The Compressometer for 4x8 Cylinders with Dial Gauge measures the average deformation and strain of concrete cylinders during compression testing for determination of modulus of elasticity.
The instruments consist of two yokes, mounted around the specimen. The bottom one is rigidly attached, and the upper one is hinged at opposite points to permit pivoting. A fixed rod connects the yokes. Yokes are lightweight aluminum alloy; other parts are cadmium plated steel.
The mechanical dial measures specimen deformation at the two opposite positions. The dial indicator has 0.2in (5.08mm) range and 0.0001in (.0025mm) divisions.
Meets ASTM C469.