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Direct / Residual Shear Test System

What is the Direct/Residual Shear test?

Direct Residual Shear Data Sheet

Sample Geotechnical Report

ShearTrac II

The ShearTrac II system performs the consolidation and shearing phases of a standard direct or residual shear test under fully automated control with convenient monitoring and instant test results. It consists of a computer-controlled unit using independent, electro-mechanical microstepper systems to apply the vertical and horizontal loads to soil specimens. No dead weights, hydraulics, or air pressure are required to operate the system, which means greater precision and significantly lower maintenance.

The rigid vertical frame is also ideal to perform consolidation (incremental or CRC/CRS) or unconfined compressive strength tests. Combined with the ability to easily upgrade the system to perform direct simple shear testing makes the ShearTrac II the most versatile shear frame available.

Applicable Test Standards

ASTM D2166, D2435, D3080, D4186, D4546, D6528
AASHTO T 208, T 216, T 236
BS 1377-5, 1377-7
ISO/TS 17892-5, 17892-10
AS 1289.6.6.1, 1289.6.2.2

Features

Stress (load) or strain (displacement) control
Tabletop design saves space
Fully automated via computer or standalone capability for control and data collection
Full automation of residual shear testing
Micro-stepper, electronic motor systems offer precise loading and shearing
More accurate, reliable, and easier to maintain than units requiring hydraulics or air pressure
Immediately produce reports according to test standards
Front panel display and keypad for observation and control of the test
Geo-Net compatibility allows access and control over a computer network
System flexibility to optionally perform Direct Simple Shear, 1-D Incremental Consolidation, Constant Rate-of-Strain (CRS) Consolidation, and Unconfined Compression testing

Specifications

Accurate displacement rate control from 0.000006 to 33 mm/min (0.0000002 to 1.3 in/min)
Vertical travel: 44.5 mm (1.75 in)
Horizontal travel: +/- 25.4 mm (1.00 in)
Dimensions: 660 x 406 x 813 mm (26 x 16 x 32 in)
Weight: 63 kg (140 lbs)
Shear boxes: 63.5 mm (2.5 in) standard; many options available (up to 100 mm (4.0 in)) including special ModCal

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Direct Residual Shear Apparatus

Related Systems

Large Direct Residual Shear

Direct Simple Shear