Product (instrument) used under transportion circumstances.

Hawkeye 2000 Series

Introduction

The 2000 Series is a professional and highly specialised range of survey products designed to meet the most demanding survey applications. The modular design of the system enables complete scaleability for future growth and can be installed in a wide variety of vehicles due to its limited requirement of computer hardware. Once your requirements are established, simply customise the Hawkeye 2000 to meet your specifications. Combined with the Hawkeye range of acquisition and processing software, you have all the tools you need to make informed decisions about your network. Various Hawkeye 2000 modules are typically installed onto a dedicated Network Survey Vehicle (NSV). The type of vehicle used as the NSV is entirely the client's choice and is commonly dictated by specific requirements of the project, end user and location the vehicle will be operated in.

Applications

  • network and project level road and asset collection surveys
  • routine pavement monitoring surveys
  • roadside inventory and asset management
  • road geometry and mapping surveys
  • contractor quality control
  • road safety assessment
  • airport runway maintenance
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Hawkeye 1000 Series

Introduction

The 1000 Series provides a selection of portable products designed to offer economical, portable solutions for road profiling and video data collection. The low cost of the 1000 Series and the fit for purpose specifications, make it an ideal solution for both video and road profiling applications. Most importantly, the 1000 Series is fully compatible with other Hawkeye products, enabling full data integration across the entire range. The Hawkeye 1000 range consists of:
a) H1000 Digital Laser Profiler .
b) H1000 Digital Imaging System .
c) H1000 DUO

Applications

  • routine pavement monitoring surveys
  • roadside inventory and asset management
  • contractor quality control
  • road safety assessment
 


Roughometer III

Introduction

The Roughometer III is a cost-effective, easy to install, portable device which provides objective and repeatable roughness results. The Roughometer III is a World Bank Class 3 roughness measurement device, which actually exceeds the specifications of the category. Whilst the Roughometer is a response-type roughness device, it eliminates the uncertainties associated with the vehicle, such as the suspension or passenger weight, by directly measuring the axle movement with a precision accelerometer. The system is suitable for use on both sealed and unsealed roads and is capable of collecting up to 13,000 km of data. Practical and easy-to-use, the Roughometer III provides a simple technique for road quality assessment and now has the advantage of an integrated GPS unit. Once a survey has been undertaken, the Roughometer III processing software enables the data to be formatted into custom graphs, tables and maps.

Applications

  • provide objective data for true evaluation of the roughness level of the road
  • objectively compare and analyse which roads are in need of repair
  • monitoring roughness deterioration trends
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Walking Profiler G2

Introduction

The Walking Profiler (WP) G2 is a precise measurement instrument for collecting and presenting continuous paved surface information. The WP G2 meets World Bank Class 1 Profilometry requirements and produces outputs including profile, grade, distance and International Roughness Index (IRI). The WP G2 samples the pavement surface at a walking pace. As the built-in data acquisition module collects and stores the data, the results are displayed in real time for simple and quick data analysis. This compact and easy to use device is accepted by PIARC (2002), FHWA (2000) and TxDOT (2000) as a reference tool for the calibration of other roughness measuring equipment including laser profilers.

Applications

  • provides accurate measurements of true profile height, grade and level
  • reference tool for calibrating and assessing high speed profilers
  • suitable for many surfaces, including pavements, foothpaths, airfields, runways, building slabs, sporting surfaces, bridges and carparks
 


Falling Weight Deflectometers : LWDs for quality assurance

Introduction

Using a portable falling weight deflectometer, PRIMA 100 LWD, is the fastest, easiest and most secure way of bearing capacity determination and quality assurance of unbound layers. PRIMA 100 measures the surface modulus and presents results immediately to allow in-situ decisions.

Applications

  • Road construction:
    216PE PRIMA226 Control of road base structures such as (sub)base, base layer gravel, recycled concrete, recycled asphalt, slag and crushed aggregate. Isotope measuring and Protor cannot be applied for recycled concrete and crushed aggregate. For this purpose PRIMA 100 is well suited, as static load bearing testing is slower and far more expensive.
  • Ramps, parking spaces, terminals, etc.:
    Control of base structures for ramps, approach areas near industrial buildings, freight terminals, stocks, parking spaces, harbour terminals, etc.
  • Industrial flooring:
    Control of base structures before concrete or asphalt paving in industrial buildings, stocks, etc. In the three cases above the employer's consultant controls the E modulus values, as the E moduli form the basis of the movement structure design.
  • Excavations:
    In connection with excavations and re-establishment of road areas etc. the E moduli are determined frequently in connection with the excavation work and when re-instating, compaction should reach the same modulus value. In this way differential settlements are avoided.
  • Construction of interim haulroads for e.g. construction work and timber transports:
    In connection with construction of interim haulroads for heavy loads, the bearing capacity is controlled during construction as the bearing capacity requirements can be very demanding in these cases.
  • Construction with geogrids:
    In connection with structures containing geogrids for reinforcement of the sublayer, the measurements will show, whether the geogrid has the expected effect.

In most cases determining E moduli is more relevant than measuring compaction degrees. This means that it is more relevant to use a light weight deflectometer than to perform isotope measurements or use laboratory determined Proctor density for comparisons. PRIMA 100 is the first portable equipment to offer measurement of in-situ E moduli. This has not possible with portable equipment in the past. Isotope and PRIMA 100 measurements are done equally rapidly, whereas Proctor results will not be ready before the day after the measurements were performed.

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Falling Weight Deflectometers : PRIMAX Trailer-mounted FWD

Introduction

The PRIMAX FWD trailer is the classic and flexible solution from Grontmij, Pavement Consultants. Mounted on a double-axle trailer it is independent of the towing vehicle and can be towed by any vehicle. The only cable connecting the trailer with the towing vehicle is the PC computer cable. The operator controls all FWD functions from the PC, which is placed in the towing vehicle. This makes the measuring work simple and easy and only one operator is needed for the work.

Modular principle:
The modular principle means that there is no need for investment in new equipment if the demands on the equipment change. All that is necessary to upgrade the equipment from a standard 7-150 kN FWD to a 7-250 kN Heavy Weight Deflectometer (HWD) or even to a 7-350 kN Super Heavy Weight Deflectometer (Super HWD) is to add more weights, a larger load cell and upgrade software. The trailer-mounted FWD can also be integrated in a van without having to invest in new basic measuring equipment. Bil 20Mm Like all FWD equipment from Grontmij, the standard trailer-mounted FWD is supplied with:
a) Personal computer
b) Windows FWD software
c) Time history module
d) Transport lock
e) DMI (Distance Meter Indicator) integrated in the software
f) Three temperature sensors
g) Four-split loading plate
h) 9 to 17 or more geophones
i) Warning lights
Additional functions can easily be added such as video or marking equipment, GPS (Geographic Positioning System), which allows presentation of data in maps or general plans on site.
Data processing:
For data processing Grontmij supplies RoSy DESIGN, a back-calculation software for both road and/or airport data analysis. However, files generated from the equipment can be applied in any other back-calculation program.
Safe and reliable system:
Grontmij attaches great importance to supplying safe and stable equipment and the available newest technology forms the basis of the FWD equipment. The PRIMAX software incorporates alarms that are displayed on the computer screen. If the operator ignores vital warnings, certain functions cannot be performed with the FWD e.g. in connection with measurement of pavement temperature: After having inserted the asphalt temperature sensor in a hole in the pavement, the sensor registers when the temperature is stable. The temperature is measured while the loading plate is placed on the pavement and cannot be raised before the temperature sensor is placed in its holder. The equipment cannot be driven to another position with the loading plate lowered down and strategically placed emergency switches allow the operator to stop the equipment at any time while operating manually.
 


PRIMAX Van-Integrated FWD

Introduction

The van-integrated PRIMAX FWD from Grontmij, Pavement Consultants is the solution when the equipment is used daily or very frequently. It is well suited for measuring in towns and densely populated areas, areas with a heavy traffic load or in areas where safe, accurate and quick manoeuvre is required, such as airports and when measuring concrete slabs. The van-integrated FWD equipment may be driven at normal driving pace and the clear and good view from the van while testing offers optimum road safety. VanThe FWD unit is well-protected in the van and leaves space for further equipment or even a small laboratory. Another possibility is to bring along the portable FWD, PRIMA 100 LWD. The combination of the traditional FWD equipment and the PRIMA 100 light FWD allows in-situ quality control in connection with rehabilitation of pavements or new constructions.

Modular design:
The modular principle means that there is no need for investment in new equipment if the demands on the equipment change. All that is necessary to upgrade the equipment from a standard 7-150 kN FWD to a 7-250 kN Heavy Weight Deflectometer (HWD) or even to a 7-350 kN Super Heavy Weight Deflectometer (Super HWD) is to add more weights, a larger load cell and upgrade software. Like all FWD equipment from Grontmij the standard van-integrated FWD is supplied with: a) Personal computer b) Windows FWD software c) Time history module d) Transport lock e) DMI (Distance Meter Indicator) integrated in the software f) Three temperature sensors g) Four-split loading plate h) From 9 to 17 or more geophones i) Warning lights j) Additional functions can easily be added such as video or marking equipment, GPS (Geographic Positioning System), which allows presentation of data in maps or general plans of site.
Data processing:
For data processing Grontmij supplies RoSy DESIGN, a back-calculation software for both road and/or airport data analysis. However, files generated from the equipment can be applied in any other back-calculation program. Safe and reliable system: Grontmij attaches great importance to supplying safe and stable equipment and the available newest technology forms the basis of the FWD equipment. The PRIMAX software incorporates alarms that are displayed on the computer screen. If the operator ignores vital warnings, certain functions cannot be performed with the FWD e.g. in connection with measurement of pavement temperature. The equipment cannot be driven to another position with the loading plate lowered down and strategically placed emergency switches allow the operator to stop the equipment at any time while operating manually.
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RetroReflective Meter_LTL-XL

Introduction

LTL-XL and LTL-X are robust, long lasting and advanced instruments designed for professionals using the latest developments in light and sensor technology. Using DELTA's gradient index technology and patented optical system, the instruments can measure all types of flat and profiled markings. The sensor response, combining the CIE eye response and the CIE illuminant A, meets both CEN and ASTM requirements for profile capacity and colour. LTL-XL and LTL-X comply with the following standards: EN 1436, ASTM E 1710, ASTM E 2176, ASTM E 2177, ASTM E 2302, ASTM E 2832

Features

  • LTL-XL and LTL-X measure all types of road markings at a simulated
  • distance of 30 m with the highest level of accuracy. The instruments
  • operate with a reproducibility of +/- 5 % and a repeatability of +/- 2 %.
  • Rl(nighttime visibility), Qd (daytime visibility), visibility under dry, wet and continuous wetting.
  • LTL-XL and LTL-X measure white and yellow markings with no adjustment.
  • LTL-XL and LTL-X have automatic stray light compensation, so
  • daylight and other outside light sources will not affect the accuracy of the measurements.
  • The Road Sensor Control (RSC) software supplied with the instrument, combined with the USB interface, makes it easy to download data and generate reports like MS-Excel reports. GPS data can easily be transferred to a GPS program like Goggle Earth for visual overview showing the results and where measurements have been taken.
 


RetroSign retroreflectometers instruments- GR3

Introduction

RetroSign instruments are modern retroreflectometers for measuring retroreflection of road signs, license plates and safety clothing. The photometric filter in the RetroSign is among the most accurate, sensitive and durable filters in the world. When combined with the point aperture geometry, laboratory precision readings for all colours and all types of retroreflective sheetings are ensured. The point aperture geometry specified by the American Society for Testing and Materials (ASTM) ensures accurate readings that replicate real-world driving conditions and corresponds to laboratory measurements. Due to the proprietary gradient index ultra hard coating (UHC) technology, available only from DELTA, the sensor response meets the ASTM 1709 requirements for combining the CIE eye response and CIE illuminant "A". RetroSign instruments comply with the following standards: EN 471, EN 20471, EN 12899, ASTM E 1709 and ASTM E 2540.

Features

  • Features a unique triple geometry that makes it easy to undertake measurements of a range of observation angles at the same time.
  • This provides the user with a significantly more comprehensive
  • image of the retroreflection of road sign.
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MIT - SCAN2 - BT

Introduction

Proper dowel bar alignment is essential for efficient load transfer between concrete pavement slabs. The operating principle behind the MIT-SCAN2-BT is pulse-induction. The pulse induction method utilizes the magnetic properties of tie bars to create a magnetic field and is referred to as Magnetic Imaging Tomography (MIT). The equipment emits a weak, pulsating, magnetic signal and detects the transient magnetic response signal induced in the metal bars. The response signals are measured with high precision using special receivers in the testing device, permitting the determination of horizontal misalignment, vertical misalignment, side shift and depth of the dowel bar from the top of the pavement.

The MIT-SCAN2-BT consists of a compact rail-guided measuring carriage, an easily assembled GRP (robust glass fiber reinforced plastic) rail system and a Pocket PC. The emission unit as well as the sensor field are placed inside the measuring carriage, which is pulled on a rail along the joint of a highway. The control of the measurement, the recording and the analysis of data are done by a Pocket PC, which communicates via Bluetooth connection with the measuring carriage. A more detailed analysis of the data can be done by the software MagnoProof on a desktop PC in the lab.

MIT-SCAN2-BT dowel scan & dowel position measurement

  • Nondestructive testing of dowel bar alignment in concrete pavement – analog to ASTM Standard E3013 / E3013M-2015
  • Joints in concrete pavements of highways, airport runways and container surfaces are exposed to high load of traffic and temperature fluctuations. To equalize the stress and to ensure equal altitudes of the concrete slabs, steel dowels and anchors are installed to distribute the load. To ensure the integrity of the joint zone in the long term, the exact installation position and permissible deviations of the anchors are regulated by standards.

Measuring carriage – Rail system – Pocket PC

The handling of the measuring carriage couldn’t be simpler. It is placed on a rail and, after starting the measurement, the carriage is pulled on this rail along the joint. A joint with the length of several lanes can be measured and analyzed within a minute. MIT-SCAN2-BT is a compact and easy to handle measuring device that can be carried by a single person. The rail consists of pluggable segments and can be transported easily. Additionally, a Pocket PC that controls measurement records, and analyzes the data is a part of the measuring unit.

Control and evaluation software

The Pocket PC – provided with the measuring system – communicate via a Bluetooth connection with the measuring device. Controlled by MagnoNorm software, the measurement data are registered locally, visualized and evaluated precisely. Software MagnoProof on the Desktop PC is available for more extensive evaluations and standardized client reports.

MagnoProof

MagnoProof was developed for the analysis of very complicated dowel bar positions and for the creation of reports on a desktop PC. This software offers a clearly arranged visualization and an exact analysis of measuring data as well as an interactive evaluation that gives reliable results even for severe misalignments. The batch processing allows for the evaluation of measurements from an entire day within minutes. MagnoProof creates an Excel-sheet that includes information on the location of joints and positions of the dowel bars. Misalignments are marked and easily recognized. As an alternative, the user can create an image that includes a color map and a display of each bar in three dimensions.



LTL-M mobile retroreflectometer

Introduction

  • Danish company Delta has unveiled its new LTL-M mobile retroreflectometer, which it says has taken about four years to develop.
  • The unit, seen at the recent Traffex show in Birmingham, UK, measures all types of road markings at a simulated distance of 30m "with the highest level of accuracy." The company says that the LTL-M is to be used mounted on a vehicle measuring retroreflection at normal traffic speed providing full overview of the condition of the road markings.
  • DELTA says the instrument operates with an accuracy of typically +/-5%, which is in line with DELTA's hand-held retroreflectometers LTL-2000, LTL-X and LTL-XL.
  • It uses the latest camera and illumination technology, which results in high accuracy independent of changes in the geometry of the system through an automatic image process compensating for vehicle movements.
  • Consisting of three units (the sensor mounted on the outside of the vehicle with camera, flashlight and GPS; processor inside the vehicle; and the graphical user interface/GUI Tablet PC placed next to the driver), the LTL-M was the subject of a study carried out by VTI, the Swedish National Road and Transport Research Institute. The results are reported in Evaluation of the LTL-M, Mobile measurement of road marking, compiled by Sven- Olof Lundkvist in 2010.
 


Non-Nuclear Pavement Quality Indicator (PQI 380)

Introduction

Introducing the next generation of TransTech Systems Non-Nuclear asphalt density gauge, the PQI 380. This version of the PQI is fully equipped with a touch screen and a user friendly graphical user interface. The PQI 380 uses Microsoft Windows CE for smooth operation, easy software upgrades and enhanced user support.

Some highlights of the PQI 380...

  • Full Color VGA display
  • LED backlight for easy visibility in light or dark situations
  • Customizable Project Entries
  • Customizable Mix Entries
  • Diagnostics reading mode
  • Data Management Screen and the ability to disable data logging
  • Rugged, Lightweight, Aluminum Shell (Reflective vinyl graphics for safety)
  • The PQI 380 also utilizes an advanced GPS system which enables position and independent time logging. A USB port enables the user to easily download data files in a comma delimited file and print out the data. The high capacity Nickel Metal Hydride rechargeable batteries are user replaceable. The easy to navigate user interface will ensure that you get setup quickly on jobs and begin taking reading in just seconds. The PQI 380 conforms to ASTM standard D7113 and AASHTO T 343-12.
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Non-Nuclear Soil Density Gauge (SDG 200)

Introduction

Introducing the next generation of TransTech Systems Non-Nuclear soil density gauge, the SDG 200. This version of the SDG is fully equipped with a touch screen and a user friendly graphical user interface. The SDG 200 uses Microsoft Windows CE for smooth operation, easy software upgrades and enhanced user support.

Some highlights of the SDG 200...

  • Full Color VGA display
  • LED backlight for easy visibility in light or dark situations
  • Customizable Project Entries
  • Customizable Material Entries
  • Diagnostics reading mode
  • Data Management Screen and the ability to disable data logging
  • Rugged, Lightweight, Aluminum Shell (Reflective vinyl graphics for safety)
  • The SDG 200 also utilizes an advanced GPS system which enables position and independent time logging. A USB port enables the user to easily download data files in a comma delimited file and print out the data. The high capacity Nickel Metal Hydride rechargeable batteries are user replaceable. The easy to navigate user interface will ensure that you get setup quickly on jobs and begin taking reading in just seconds. The SDG 200 conforms to ASTM standard D7830.
 


Servo-Pneumatic Universal Testing Machine

Introduction

Rapid determination of modulus, permanent deformation and fatigue of bituminous mixtures using cylindrical specimens that are cored from the highway or prepared in the laboratory This machine is a development of the NAT which was developed by Keith Cooper and Professor Steven Brown at the University of Nottingham. The use of a high precision servo-pneumatic valve in conjunction with a low-friction actuator and sophisticated data acquisition and control, results in a performance that is equal to many servo-hydraulic systems. Accurate, digitally generated waveforms are applied by the actuator producing repeatable stress variations in test specimens that are simulative of those in a road pavement due to moving traffic. The actuator is double-acting allowing both compressive and tensile forces to be applied. A triaxial cell system is available for the measurement of the resilient modulus of unbound materials.

Standards

  • EN 12697-26 Annex C
  • EN 12697-26 Annex D & E
  • ASTM D7369
  • ASTM D4123
  • ASTM D3497
  • AASHTO TP31
  • AASHTO TP62 / TP79
  • Permanent Deformation: EN 12697-25 Methods A & B
  • EN 12697-24 Annex E
  • ASTM D7313 DCT (Disc shaped compact tension test)
  • EN 12697-44 SCB (Semi circular bending test)
  • Simple Performance Tests:
  • Flow number
  • Flow time
  • NCHRP9-19; NCHRP9-29
  • Unbound Materials: AASHTO T307 (previously TP46)
  • NCHRP 1-28A

Features:

  • Low cost dynamic loading universal test system ideally suited to testing asphalt and unbound granular materials
  • Double acting low friction actuator with integral stroke transducer
  • Utilises high performance ceramic spool servo-valve
  • High quality stainless steel frame
  • Issued with UKAS accredited certificate of calibration for EN 12697-24; EN 12697-25, EN 12697-26
  • Accessories available to perform a range of standard and non standard test methods
  • Can be supplied with standard software to perform EN, ASTM and AASHTO test methods and universal software with which to design non standard test routines

Application

  • Assessment of resistance to permanent deformation (rutting)
  • Measurement of stiffness modulus
  • Assessment of resistance to fatigue cracking
  • Resilient modulus of unbound materials
  • Mix design


Servo-Hydraulic Universal Testing Machine

Introduction

  • A new generation of Universal Testing Machine combining state of the art technology with proven reliability and precision for research and standard testing
  • The Servo-Hydraulic Universal Testing Machine (CRT-UTM-HYD) is a well designed, inexpensive machine specifically developed for the testing of materials used in pavement construction. A motorized, adjustable crosshead reduces the time between test setups. The programmable temperature cabinet provides the possibility to perform frequency/temperature sweeps. Accurate waveforms are digitally generated and applied by the actuator producing repeatable conditions that are simulative of those created by moving or static vehicles. The actuator is double-acting allowing both compressive and tensile forces to be applied. Various systems are available for the measurement of the modulus of unbound materials.

Standards

  • EN 12697-26 Annex C
  • EN 12697-26 Annex D & E
  • ASTM D7369
  • ASTM D4123
  • ASTM D3497
  • AASHTO TP31
  • AASHTO TP62 / TP79
  • Permanent Deformation:EN 12697-25 Methods A & B
  • DD226
  • Flow number
  • Flow time
  • NCHRP9-19; NCHRP9-29
  • Fatigue:
  • EN 12697-24 Annex E
  • ASTM D7313 DCT (Disc shaped compact tension test)
  • EN 12697-44 SCB (Semi circular bending test)
  • Chinese Tests:
  • Bending; Creep; Splitting Test
  • T 0738-2011
  • Unbound Materials:
  • AASHTO T307 (previously TP46)
  • NCHRP 1-28A

Features:

  • Low cost dynamic loading universal test system ideally suited to testing asphalt and unbound granular materials
  • Double acting low friction actuator with integral stroke transducer
  • Utilises high performance ceramic spool servo-valve
  • High quality stainless steel frame
  • Issued with UKAS accredited certificate of calibration for EN 12697-24; EN 12697-25, EN 12697-26
  • Accessories available to perform a range of standard and non standard test methods
  • Can be supplied with standard software to perform EN, ASTM and AASHTO test methods and universal software with which to design non standard test routines

Application

  • Assessment of resistance to permanent deformation (rutting)
  • Measurement of stiffness modulus
  • Assessment of resistance to fatigue cracking
  • Resilient modulus of unbound materials
  • Mix design
 


Stand Alone Four Point Bending Beam Machine

Introduction

A low cost, accurate beam testing system which facilitates the rapid throughput of modulus and fatigue tests. Bending tests are widely used for measuring the stiffness modulus and assessing the fatigue resistance of asphaltic paving materials. Four point bending tests are included in CEN, AASHTO and Chinese test specifications. The specimen is a prismatic beam which is subjected to sinusoidal loading in either the controlled strain or controlled stress modes. The CRT-SA4PT-BB uses advanced servo pneumatic technology and a high-speed digital data acquisition and control system together with user-friendly software. During testing both graphical and tabular data are displayed on screen and test data is stored to disc in Microsoft Excel compatible format. The clamps are at 118.5mm centres (the distance between the outer clamps is 335.6mm (14 inches) according to AASHTO specifications but the height and width of the beam can be varied).Tests on beams containing aggregates greater than 20mm are not strictly in accordance with annex D of EN 12697-24 which states that this non-compliance should be explicitly mentioned in the test report.

Standards

  • EN 12697-24 Annex D
  • EN 12697-26 Annex B
  • AASHTO T321-03 (TP8)

Features:

  • Frequency range 0.1 to 30Hz
  • Low cost pneumatic stand alone four point bending machine
  • Utilises a low-friction actuator and high performance ceramic spool servo-valve
  • On-specimen measurement system removes errors due to frame flexure
  • Accepts AASHTO beam sizes
  • Sinusoidal controlled strain or controlled stress fatigue test modes
  • Constant torque motorized specimen clamping to eliminate errors due to localised beam indentation
  • Self-contained loading system
  • User friendly software for determination of fatigue resistance and stiffness modulus
  • Supplied with certification of a UKAS accredited calibration

Application

  • Mix design
  • End product specification
  • Assessment of new materials
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Wheel Tracker Small Devices - 1 & 2 Arms

Introduction

The CRT-WTEN1 and CRT-WTEN2 are supplied with a UKAS certificate of accreditation validating conformance to EN 13108 Wheel tracking is used to assess the resistance to rutting of asphaltic materials under conditions which simulate the effect of traffic. A loaded wheel tracks a sample under specified conditions of load, speed and temperature while the development of the rut is monitored continuously during the test. Test specimens can be either slabs prepared with a laboratory compactor or 200mm φ cores cut from the highway. The CRT-WTEN1 wheel tracker performs both procedures A and B specified for the small scale device in EN 12697-22. Procedure A requires that six specimens are tested. For procedure B only two specimens need to be tested, but rut depth must be measured at more points along the longitudinal rut profile. To speed up the testing process the CRT-WTEN2 was designed to test two specimens simultaneously.

Standards

  • Standards
  • EN 12697-22 Small device
  • AST 01:2004
  • BS 598-110:1998

Features:

  • Tests materials for roads with axle loads up to 13 tonnes
  • Rigid test frame built from extruded aluminium section
  • Integral temperature controlled cabinet with double glazed doors
  • PID control of test temperature in the range 40°C to 62°C
  • Rack for pre-test temperature conditioning of specimens
  • The CRT-WTEN2 tests two specimens simultaneously
  • Specimens compacted with the Cooper Technology Roller
  • Compactor can be transferred directly to the wheel tracker without de-moulding
  • Closed-loop speed control
  • User-friendly Windows software
  • Supplied with certification of a UKAS accredited calibration

Application

  • Determination of the rut resistance of asphaltic paving materials
 


Hamburg (Immersion) Wheel Tracker

Introduction

The only truly sinusoidal Hamburg wheel tracker on the market. Another representation of Cooper quality and attention to detail The Hamburg type dual arm immersion wheel tracker is widely used to evaluate the resistance to rutting and moisture susceptibility of asphalt mixtures following either EN12697-22 or AASHTO-T324. The device was developed in the 1970's by Esso A.G. of Hamburg, Germany. It was based on the TRL wheel tracker which is also now included in EN12697-22. Originally the Hamburg test was used by the City of Hamburg to measure rutting susceptibility. The test was performed for 9,540 wheel passes at either 40 or 50°C. Water was used to obtain the required test temperature rather than air. The City of Hamburg later increased the number of wheel passes to 19,200 and found that some mixtures began to deteriorate from moisture damage. Greater than 10,000 wheel passes was generally needed to show the effects of moisture damage. Specimens can be prepared in the laboratory, or cores taken from the road can be used. Loaded steel or rubber wheels track a sample under regulated load, speed and temperature, whilst the development of the rut is constantly monitored and recorded throughout the test.

Standards

  • EN 12697-22
  • AASHTO-T324
  • Other national standards where relevant

Features:

  • Able to perform AASHTO-T324 and EN 12697-22
  • State of the art software which provides higher level users with options, and lab technicians ease of use
  • Advanced machine with 4 testing modes: Wet, wet heat, Dry and Dry heat (with optional heating hood)
  • A mechanical re-circulating water bath controls the temperature to within + - 0.5°C in a range of (20-75) °C
  • Variable speed range between 15 and 30RPM
  • Two displacement transducers attached to the wheel support arms measure the depth of the ruts as they develop with a resolution of 0.01mm to a maximum rut depth of 50mm
  • The depth of the rut is measured automatically and constantly as specified in the AASHTO and EN standards
  • Rubber or stainless steel wheels, and various widths to alter the applied pressure
  • Various mould options including laboratory compacted and cores (AASHTO and EN)
  • UKAS Certificate supplied
  • Cooper is the world number one wheel tracker manufacturer

Application

  • Investigation of resistance to rutting
  • Investigation of moisture susceptibility
  • Testing of laboratory compacted slabs
  • Testing of field cores
  • Production of creep slope, stripping inflection point and stripping slope.
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Gyratory Compactor :CRT-GYR

Introduction

  • A high quality machine with which the user can easily and safely obtain accurate, repeatable results day after day
  • Gyratory compaction is considered to be one of the best methods of laboratory compaction for the assessment of compactibility and the manufacture of test specimens.
  • Compaction is achieved by the application of a vertical stress (normally 600KPa) via end platens to a known mass of asphaltic mixture within a 100 or 150mm internal φ mould. The longitudinal axis of the mould is rotated (gyrated) at a fixed angle to the vertical whilst the platens are kept parallel and horizontal.
  • During compaction the height of the sample is automatically measured and both the mixture density and void content calculated. The compaction data is shown on-screen in graphical and tabular format as compaction progresses and it is also saved in Microsoft Exce compatible format. The operator can choose whether to compact for a certain number of gyrations or until a target mixture density or void content is achieved.
  • Problems with existing compactors are mainly related to build quality and ease of use. Unlike most compactors 100 and 150mm φ moulds can be tested without changing machine parts. A filled gyratory compactor mould is heavy and often very hot. In many cases these moulds have to be lifted in and out of gyratory compactors. With the CRT-GYR no lifting of filled moulds is required. They are automatically lowered into position for compaction and then lifted up again for transfer to the integrated demoulding system.

Features

  • Complies with EN 12697-10 and EN 12697-31 . Can be configured to comply with SHRP Superpave specifications
  • Automatic mould insertion and retraction
  • 150mm and 100mm internal φ moulds can be tested without changing parts
  • Cold mix (emulsion) materials can be compacted and the expelled fluid collected
  • USB link with data acquisition and control system so that desktop can be used as host computer time
  • Compaction data stored in Microsoft Excel compatible format
  • Machine calibrated with traceable equipment
  • Option for mould up to 300mm high.

Appliicatons

  • Compaction of asphaltic paving material to a target mixture density or void content
  • Assessment of mixture compactibility . SHRP Superpave asphalt mixture design
  • Preparation of cylindrical test specimens
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Hydraulic Standard Roller Compactor Dual size

Introduction

Advanced integrated hydraulic control, precision and reliability guaranteed The Roller Compactor is considered to be the method of laboratory specimen compaction that results in slabs of asphaltic paving materials with properties that most closely simulate those of materials in the highway. Slabs can be compacted to target mixture densities using loads that are equivalent to those of full-scale compaction equipment. The CRT-RC-H2 is hydraulically powered and controlled by a programmable logic controller (PLC) connected to an HMI which the operator can use to select the number of passes. A manual pressure control is adjusted to set the required load. Its main function is to produce slabs for wheel tracking tests. Users have compacted hot asphaltic materials over stress absorbing membrane interlayers (SAMIs) on a base of cracked concrete in order to assess the effectiveness of the SAMI by using shear or bending tests.

Standards

  • EN 12697-33 Steel roller

Features:

  • Steel wheeled roller segments
  • Solid machine frame
  • Optional heated head for reducing mixture sticking to roller during compaction
  • Model for compaction of 305 x 305mm and 305 x 400mm slabs
  • Slab depth from 40 to 135 mm
  • Roller compactor moulds will fit Cooper Technology Wheel trackers so that compacted slabs can be wheel-tracked without de-moulding
  • Maximum compaction load of 30kN per 305mm roll width (equivalent to largest on-site static rollers)
  • Speed control
  • HMI for operator selection of number of passes
  • Slabs can be used as wheel-tracking specimens, and cored to make indirect tensile test specimens or cut into beams for 4 Point Bending Test
  • Vibrating roller option with adjustable frequency to simulate on-site vibratory rollers
  • CE marked

Application

  • Preparation of homogeneous asphalt slabs
  • Wheel tracking tests
  • Coring to produce specimens for indirect tensile and axial tests
  • 4 Point Bending Test Beam
 


Asphalt Rolling Thin Film Oven

Introduction

Coopers RTFO accurately simulates the short term aging of asphalt binder which occurs during mixing The Superpave PG binder specification looked for tests which would closely simulate field performance. Hotmix asphalt binder experiences significant aging during the manufacturing and laying process. Investigating this phenomenon within a laboratory environment, with a repeatable and simple test is very useful within the design process. The Rolling Thin Film Oven (RTFO) test is used to measure the effect of heat and air on a moving film of semi-solid asphalt binder. The results of this treatment are determined from measurements of the binder properties before and after the test. Repeatability of the test is directly related to the accuracy with which the oven temperature can be maintained and the reproducibility of the thermal rise time of the system. The invention of RTFO by Cooper is led to the present day AASHTO, ASTM and EN standards for Rolling Thin Film Oven test.

Standards

  • AASHTO T240
  • ASTM D2872
  • EN 12591
  • CTM 346

Features:

  • Super accurate P.I.D. controller
  • Low thermal mass RTD
  • Over temperature safety cut-out
  • Double walled temperature cabinet
  • Unique temperature control suppression
  • Made in California
  • System Elements
  • Long life sustainable bearings to overcome temperature
  • fluctuation
  • Integrated unique controller which allows for the quickest
  • response time without excessive overshoot
  • Testing jars (full set) supplied according to standard requirements
  • Stainless steel interior
  • Integral dual 4 digit LED displays allows viewing of the process temperature and set point simultaneously
  • Heavy duty "flush fit" door locking system
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Core and Beam Saws

Introduction

Easy-to-use, fast and accurate sawing systems. Best in class, safety features Cooper Technology has developed easy-to-use sawing systems for fast, accurate cutting of beams for asphalt prisms (prepared in Cooper Technology's Roller Compactors - small and large models) to be used for Four Point Bending Beam Testing in CRT-SA4PT-BB and CRT-LH4PT-BB, for Two Point Bending Beam testing in CRT-2PT, and cutting &dressing round cores and large &small wheel tracked slabs.

Features:

  • Suitable for natural and artifical slabs, asphalt, concrete, tile, marble, granite
  • Four point beam testing jigs supplied as standards
  • Variable speed and electromotive feed available as options
  • CE marked

Application

  • Cutting of prisms to be used in Four Point Beam Bending testing according to EN123697-24/26 and AASHTO T321
  • Cutting of trapezoidal specimens to be used in Two Point Beam Bending testing according to EN12697-24/26
  • Cutting and dressing of round cores up to 200mm depending on model
  • Cutting and dressing of wheel tracking slabs
 


Pendulum Skid Resistance Tester

Introduction

The Cooper-Wessex skid resistance tester is one of the best portable skid resistance tester in the world. The Cooper-Wessex Pendulum Skid Tester CRT-PENDULUM is the high quality skid resistance testing equipment. Originally designed in the 1940s in the US, the instrument was further developed in the 1960s at the UK Transport Research Laboratory for the testing of road surfaces. The CRT-PENDULUM measures the frictional resistance between a rubber slider mounted on the end of a pendulum arm and the test surface. This provides highway engineers with a routine method of checking the resistance of wet and dry surfaces to slipping and skidding, both in the lab and on site. It is based on the Izod principle: a pendulum rotates about a spindle attached to a vertical pillar. At the end of the tubular arm a head of known mass is fitted with a rubber slider. The pendulum is released from a horizontal position so that it strikes the sample surface with a constant velocity. The distance travelled by the head after striking the sample is determined by the friction of the sample surface. A reading of Skid Resistance is obtained.

Standards

  • EN 1097-8:2009
  • EN 1436:1997
  • EN 13036-4:2003
  • ASTM E303-93
  • AS/NZS 4586:1999
  • BS 812 Pt 114
  • BS 6077 Pt 1
  • BS 7044
  • BS 7188
  • BS 8204
  • BS 7976

Features:

  • Designed for laboratory and in situ road surface testing
  • Dispatched calibrated to EN1097-8 (accredited under ISO 9001:2000)
  • Low friction arm, and lightweight pointer
  • Comes with integral 'F' scale for use with small slider set for 76mm slide length. (PSV test)
  • Repeatable and reproducible
  • Supplied with robust carrying case
  • Made in the United Kingdom

Application

  • Assessment of surface friction and skid resistance properties
  • Testing of aggregates in the PSV (Polished Stone Value) test
  • Testing of new road surface materials under development
  • Testing of pedestrian walkways
  • Traffic accident investigations
  • Litigation investigations
  • Testing of pavers in the Flat Bed Polisher
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E-spott - Spot testing for road and layered surfaces.

Introduction

The e-Spott is an advanced ground Probing radar system designed specifically to measure the total bound layer depth of roads and other layered surfaces. Once the operator has activated the system by pressing the one and only button, signals begin to be transmitted into the ground. These are reflected back to the surface from any discernable material change and automatic recognition software is applied to identify those signals returning from the first significant layer interface. At the same time advanced signal processing determines the velocity of propagation within the first subsurface level and translates this into the depth reading. This all happens within 10 seconds of pressing the button and the reading is displayed for a further 10 seconds, allowing the operator ample time to record it if required. Activation of any GPR system within the UK or EU is covered by regulation and in the UK a licence is also required. The nature of the materials normally used to form the surface and binder layer of a highway have little effect on the e-Spott allowing it to distinguish between these and the base layer by their electromagnetic properties. This is possible where there is a significant difference between them. The e-Spott system is a transmission device operating between 600MHz to 2.5GHz and conforms with all current European technical standards for GPR based devices and specifically EN 302 066-1. Similar regulations may exist in other locations.