Nu-5 and Nu-10 SERVO-HYDRAULIC UNIVERSAL TESTING SYSTEM ASPHALT PHYSICAL TESTING SYSTEM mastrad  logohome








CRT-SH SERVO-HYDRAULIC UNIVERSAL TESTING SYSTEM ASPHALT PHYSICAL TESTING

Nu-5 and Nu-10 SERVO-HYDRAULIC UNIVERSAL TESTING SYSTEM

Highway Engineering Pavement Design

"Almost all standard mechanical asphalt and triaxial unbound material tests can be run with this system"

A SERVO-HYDRAULIC TEST SYSTEM OFFERS SIGNIFICANTLY MORE POWER THAN PNEUMATIC SYSTEMS WITH HIGHER FORCES WHICH ARE CONTROLLABLE OVER A WIDER RANGE OF FREQUENCIES. FOR THESE REASONS SERVO-HYDRAULIC SYSTEMS ARE THE FIRST CHOICE OF RESEARCH CENTRES ALL OVER THE WORLD. UNTIL RECENTLY THE HIGH COST OF SERVO-HYDRAULIC SYSTEMS HAS PLACED THEM BEYOND THE REACH OF MANY LABORATORIES. NOW, HOWEVER, THE NEW CRT-SH RANGE PROVIDES EQUIPMENT AT THE RIGHT PRICE TO MEET YOUR REQUIREMENTS.see also NAT Asphalt Testing System


BASE SYSTEM CRT-SH-10kN


CRT-SH SERVO-HYDRAULIC UNIVERSAL TESTING SYSTEM ASPHALT PHYSICAL TESTING
Assembled base capable of applying loads up to 10kN at frequencies up to 50 Hz* with full instructions and comprising:
  • Test frame with stainless steel base columns and adjustable height cross-head mounted on a base unit
  • Hydraulic actuator with integral displacement transducer. Maximum force 10kN. Stroke 35mm fitted with fatigue rated load cell transducer 10kN capacity and Moog 760-531 MFB servo-valve.
  • 2.2 kW power pack (hydraulic pump and tank) complete with all unload and relief valves, filter and hoses to actuator
  • Programmable servo-control unit.
  • Computer Boards CIO-AS1602 for interfacing computer.
  • Transducer signal conditioning interface unit for load, dispalcement and temperature transducers.

Dimensions:- 80 x 60 x 190cms Weight:- 140kgs

AUTOMATED TEST SYSTEM

crt-sh servo-hydraulic universal testing system asphalt physical testing

Automated Test System (ATS) software for true Closed Loop Test Control with Windows (3.1 or '95)interface, context sensitive help, pop-up menus and customizable on-screen displays. Full report templates, transducer calibration routines and ATS Scope for optional dual-trace oscilloscope displays in X,Y or X-Y modes.

DYNAMIC-REPETITIVE-CREEP-RAMP-SEQUENCER-DATA-WAIT-LIMIT

Almost all standard mechanical asphalt and triaxial unbound material tests can be run with this software which can control up to 4 closed loop procedures.

Test Routines include:-

  • AASHTO T294/SHRP P46 -AASHTO TP7/SHRP P005
  • AASHTO TP10 - AASHTO TP0/SHRP M005 - ASTM D3497
  • ASTM D4123/SHRP PO7/AASHTO TP31 - M009
  • RSST-CH (TP/P005) - 2 Degree of freedom controller
  • (Custom Test Modules can be implemented)
TEST MODULES FOR TESTING SYSTEM - CRT-SH-10kN

CRT-IT-SH

Indirect tensile module with full instructions and comprising:

  • sub-frame
  • alignment jig
  • loading strips
  • LVDT transducer yokes and transducer adjusters
  • two 0.1mm range LVDT displacement transducers
  • steel check ring for checking IT transducer accuracy

Dimensions:- 40 x 30 x 40cms Weight:- 15kgs

for measuring resilient modulus (indirect tensile stiffness modulus) of 100mm and 1 150mm diameter asphalt concrete and cement stabilised specimens

CRT-PD-SH

Permanent deformation module with full instructions and comprising:

  • hardened and ground platens (1 100mm diameter)
  • hardened and ground platens 150mm diameter)
  • LVDT displacement transducer clamps and slide rods
  • two 10,Omm range LVDT displacement transducers

for uniaxial creep and dynamic creep tests on 1 100mm and 150mm diameter asphalt concrete Specimens.

Dimensions:- 40 x 30 x 20cms Weight:- 20kgs

CRT-4PT-BFAT-SH

Beam fatigue module with full instructions and comprising..

  • cradle assembly and clamps for 50.8 x 63.5 x 3 1 8mm specimens
  • dummy specimen
  • two 5.Omm range LVDT displacement transducers

for controlled strain or Controlled stress 4 point bending beam fatigue tests

Dimensions:- 60 x 30 x 30cms Weight:- 30kgs

CRT-100UBTRIAX-SH

Unbound materials triaxial test module with full instructions and comprising:

  • triaxial cell for 10Omm dia. x 200mm high samples with axial and radial deformation and,cell pressure measurement system, sample caps with porous disc interfaces
  • cell pressurisation system including regulator, filters and pressure gauge
  • split mould (10O mm ID) for specimen preparation
  • set of 100 neoprene membranes for 100mm dia
  • PVC dummy specimen 10Omm dia. x 200mm high
  • Compressor, 4cfm at 10bar

Note:As there arc, a number variations of equipment depending upon the type of material to be tested only the basic equipment for unstabilised, non-cohesive unbound materials is included.

Dimensions:- 50 x 60 x 70cms Weight:- 50kgs

CRT-TCC1-SH

Environmental chamber to enclose asphaltic concrete material test modules with split chamber system for quick removal when testing non temperature dependent materials. 10C to +60C 0.5C accuracy.

Dimensions:- 80 x 80 x 150cms Weight:- 120kgs

*Note: With all servo-systems (hydraulic or pneumatic) the applied load range decreases as frequency decreases. This depends on a number of factors including the test configuration and the nature of the material being tested.

crt-sh servo-hydraulic universal testing system asphalt physical testing