Infrastructure is critical for development of any nation. AnÂ appropriate level of quality can be determined during all phases of the construction project by using Quality Equipment, especially in
construction and commissioning stages. It is therefore suggested noÂ compromises should be done with use of Quality Instruments as theseÂ Â ensure construction of desired standards and life.
Quality check of Road construction includes properly evaluating the pre and post construction activities, which is a very sensitive andÂ intensive activity. Rightly choosing the effective substitute methodsÂ to conventional methodologies can improve the quality control checkÂ for soil compaction in a highly cost effective, less human interventionÂ and errorless way.
Light Weight Deflectometer (LWD)
The Dynatest Light Weight Deflectometer (LWD), also knownÂ as the light falling weight Deflectometer (LFWD), light drop weightÂ test and dynamic plate load test, is a portable device that measuresÂ the soil in-situ LWD dynamic modulus (Stiffness and in-situ elastic modulus). Typically, this modulus is used to evaluate the subsoil degreeÂ of compaction. Thus, it is suitable for compaction quality control ofÂ soil-surfaced roads, embankments and replacement fill.
Falling Weight Deflectometer (FWD)
The Dynatest Falling Weight Deflectometer (FWD) applies a dynamic load that simulates the loading of a moving wheel. The pavement response is analysed with
Dynatestâ€™s ELMOD (Evaluation of Layer Moduli and Overlay Design) software to determine the elastic moduli, stresses and strains of each modelled layer. ELMOD reports the weakest layer of failure, residual life and determines the optimum rehabilitation alternatives. The FWD is available as a trailer or a truck mounted version (USA only) meeting all FWD standards worldwide.
The Aimil Visco 2000 Viscometer is specially designed to perform ASTM 04402 & BIS 73 high temperature testing of asphalt binders. The viscometer featuresÂ an electrically heated thermal chamber with an auto – tuned PIO controller for precise regulation of asphalt temperatures up to 300Â°C supplied complete with a C25Â titanium bob & stainless-steel cup. Single point measurements can be performed via the instrument front panel and displayed on the built-in keyboard or optional printer, eliminating the need for a PC. However, if more sophisticated tests and analysis is needed, the viscometer can be interfaced with a PC and can be used
in conjunction with Aimil Visco software.
Dynamic Shear Rheometer
The Malvern Kinexus DSR Series is the next generation rotational rheometer platform for Asphalt testing thatâ€™s been developed from extensive market knowledge and feedback, integrating innovative instrument design with a revolutionary software interface, to deliver an intelligent solution that will exceed your rheological expectations. A modular rheometer with true â€˜plug and playâ€™ functionality is available for all measuring systems and environmental controlÂ units. The Kinexus DSR SeriesÂ enables pioneering Standard Operating Procedure (SOP) based testingÂ with a built-in comprehensive library of standard test protocols forÂ the Asphalt industry.
Universal Testing Machine
The Cooper UTM machine is aÂ development of the NAT, which wasÂ developed by Keith Cooper and ProfessorÂ Steven Brown at the University ofÂ Nottingham. The use of a high precision
servo-valve in conjunction with a lowfrictionÂ actuator and sophisticated dataÂ acquisition and control, results in aÂ performance that is equal to many servohydraulicÂ systems.
Accurate, digitally generatedÂ waveforms are applied by the actuatorÂ producing repeatable stress variations in test specimens that areÂ simulative of those in a road pavement due to moving traffic. TheÂ actuator is double-acting allowing both compressive and tensile forcesÂ to be applied. Different attachments are available for the measurementÂ of Resilient Modulus (ASTM D7369), Dynamic Creep, ITD for Asphalt,Â unbound soil testing etc.
Compression Testing Machine
Automatic Compression TestingÂ Machine are fully automated version ofÂ the manual/semi-automatic compressionÂ testing machine. The machine is availableÂ in 50kN to 5000kN capacity ranges. ItÂ has provision for automatically turning theÂ pump on & off, controlling the set pace
rate & switching the machine off underÂ predetermined conditions. The controlÂ releases the pressure at the end of everyÂ run & reinitializes the machine at theÂ beginning of every test. The pace rate is maintained by means of fullÂ three term PIO feedback control using high torque stepper motors &Â driver sets. Data acquisition, storage, management & analysis are all
The â€œTrue Speedâ€ load frame provides a long term, very lowÂ maintenance, value for money operation. The frame works on anÂ internal feedback system and eliminates the fixed gear system. TheÂ limitation of speed drops in the older load frames with increase inÂ load is now removed, giving higher accuracy. True Speed Pave FrameÂ is used for applications such as CBR, UCS, Marshall both standard andÂ modified, indirect Tensile, Triaxial and other routine tests.
Bump Integrator also known as Roughometer or Automatic RoadÂ Unevenness Recorder gives quantitative integrated evaluation ofÂ surface irregularities on a digital counter or LCD screen. It comprisesÂ of a single wheeled trailer, with a pneumatic tyre mounted on aÂ chassis, on which an integrating device is fitted. The machine has aÂ panel board fitted with two or four sets sets of digital counters forÂ accounting the unevenness index value. The operating speed of the
machine is 32Â±0.5 km/hr.
Asphalt Content Tester (IRC Accredited)
This machine is used to determine the asphalt content of hot mixÂ asphalt (HMA), paving mixtures and pavement samples by removingÂ the asphalt in an ignition furnace by means of sample heating not byÂ means of solvents.