Soil On-Specimen Measurement
The GCTS Soil Deformation Devices (DEF-AXC & DEF-SRCP Series) provide precise measurements of axial and average radial strain on specimens.
The DEF-AXC Series features upper and lower LVDT support rings compatible with submersible or standard LVDTs. The split support rings are clamped with rubber bands, preventing rotation and allowing lateral expansion. For soft specimens, clamps can be used on the top and bottom platens to avoid damage.
The DEF-SRCP Series includes a circumferential roller assembly with anodized aluminum and Teflon rollers for smooth displacement. It features an integrated submersible proximity sensor with a 5 mm range and can be adjusted for specimens with diameters from 35 mm to 150 mm by adding or removing assembly links.
The Large-Scale DEF-SRCP-600 combines DEF-S1610 Axial Deformation Gages with DEF-SRCP-600 circumferential gauges. Each DEF-S1610 has a 150 mm radius LVDT holder and rod extension for measuring axial strains, avoiding platen end effects. The DEF-SRCP-600 includes a 10 mm range water-submersible LVDT, with three positional settings providing various deformation ranges. Multiple DEF-S1610 devices can be used for comprehensive axial deformation measurement.
DEF-AXC Series
HIGHLIGHTS
- Standard available sizes include: 71 mm, 100 mm, and 150 mm diameter specimens (other sizes optionally available)
- Horizontally guided to prevent rotation
- Made of acrylic with lightening holes for minimum mass
- Can be used for Uniaxial or Triaxial testing
- Measures axial strains directly on specimen
- Very easy to setup and use
- Meets NCHRP requirements
DEF-SRCP
HIGHLIGHTS
- Measures average radial strains
- 2,000 kPa water service
- Accommodates specimens with an initial diameter from 35 mm to 150 mm
- 5 mm maximum deformation range
- 0.2 um resolution
- Made of lightweight materials for minimum mass
- Can be used for uniaxial or triaxial testing
- Includes non-contacting sensor
- Very easy to setup and use
DEF-S1600
HIGHLIGHTS
- Measures average axial and radial strains on 300 mm diameter specimens
- Waterproof to 2,000 kPa
- Can be use for testing soils, asphalt and other materials
- Includes axial LVDTs with 25 mm range and 1.0 micron repeatability
- Includes radial strain device with three ranges (100 mm, 25 mm, and 10 mm) and LVDT with 1.0 micron repeatability
- User configurable
- Small strain measurements on large-scale specimens
- Range selection for small, medium, and large radial strains
- Other available devices for cylindrical specimens with diameters from 200 mm to more than 1,000 mm
