Rock, Concrete and Asphalt Extensometers

Designed primarily for compressive strength tests on rock, concrete and other large compression samples, this model measures axial strain on opposite sides of the test specimen, and the output is an average of the two readings. Gauge lengths from 1 to 8 inches (25 to 200 mm) and measuring ranges from .050 to .250 inches (1.2 to 6 mm) are available.

Gauge Lengths: 25 – 200 mm
Measuring Ranges: ±1.2 mm to ±6.0 mm
Temperature Range: -270 °C to 200 °C with -LHT option
Key Features: Averaging axial rock/concrete extensometer

With gauge lengths of 1 and 2 inches (25 and 50 mm) and measuring ranges of 0.050 and 0.100 inches (1.2 and 2.5 mm), the Model 3442RA1 was designed for applications where tensile or compressive strength tests on small rock, concrete and other small compression samples is desired.

Gauge Lengths: 25 – 50 mm
Measuring Ranges: ±1.25 mm and ±2.5 mm
Temperature Range: -270 °C to 200 °C with -LHT option
Key Features: Miniature averaging axial rock/concrete extensometer

Designed for concrete and rock compression testing or for compression tests on other large samples. This model may be used simultaneously with the Model 3542RA axial extensometers.

Diameter Range: 50 – 200 mm
Measuring Ranges: 2 mm to 12 mm
Temperature Range: -270 °C to 200 °C with -LHT option
Key Features: Circumferential

Designed to many of the needs for testing asphalt core samples in 4 and 6 inch diameters. The unit meets test method requirements for strain measurement developed under the U.S. Federal Highways SHRP program.

Gauge Lengths: 25 – 100 mm
Measuring Ranges: ±0.5 mm
Temperature Range: -270 °C to 200 °C with -LHT option
Key Features: Biaxial

Designed to meet many of the needs for testing asphalt core samples in 4 and 6 inch diameters. It meets test method requirements for strain measurement developed under the U.S. Federal Highways SHRP program.

Specimen Size: 100 mm and 150 mm
Measuring Ranges: 0.76 mm to 2.0 mm
Temperature Range: -270 °C to 200 °C with -LHT option
Key Features: Indirect tensile testing of asphalt

Designed for accurate measurement of small diametral strains such as those required to determine Poisson’s ratio of rock, concrete and asphalt samples. The units are designed to be used in conjunction with the Model 3542RA axial averaging extensometer.

Specimen Size: Customizable
Measuring Ranges: 0.76 mm to 2.0 mm
Temperature Range: -270 °C to 200 °C with -LHT option
Key Features: Diametral