MODEL 3442RA1 Miniature Averaging
Axial Extensometers
Designed for tensile or compressive strength tests on rock, concrete, and other small diameter compression samples. Axial strain is measured on opposite sides of the test specimen and the output is the average of these two readings.
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Model 3542RA Averaging
Axial Extensometers
Designed for tensile or compressive strength tests on rock, concrete, and other large compression samples. Axial strain is measured on opposite sides of the test specimen and the output is the average of these two readings. This model may be used simultaneously with the Model 3544 circumferential extensometer or the Model 3975 diametral extensometer.
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Model 3544 Circumferential Extensometers
Designed for concrete or rock compression testing or for compression tests on other large samples. This model may be used simultaneously with the Model 3542RA axial extensometer.
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Model 3909 Extensometers for Simple
Performance Testing of Asphalt
Designed for measuring axial displacements in the simple performance tests prescribed by NCHRP Report 465, and determining dynamic modulus of hot mix asphalt per AASHTO TP062.
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Model 3910 Extensometers for
Creep Compliance and Tensile
Strength Testing of Asphalt
Designed for creep compliance and tensile strength testing per AASHTO T322. This model meets many of the needs for testing asphalt core samples in 4 and 6 inch diameters. They meet the requirements developed under the U.S. Federal Highways SHRP program.
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MODEL 3911 Extensometers for
Indirect Tensile Testing of Asphalt
Designed in accordance to AASHTO TP31 and ASTM D4123. This model meets many of the needs for testing asphalt core samples in 4 and 6 inch diameters. They meet the requirements developed under the U.S. Federal Highways SHRP program.
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MODEL 3975 Extensometers for
Diametral Rock and Concrete Testing
Designed for accurate measurement of the small diametral strains such as those required to determine the Poisson's ratio of rock, concrete, and asphalt samples. This model may be used simultaneously with the Model 3542RA axial extensometer.
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