Concrete
Pad Caps and Retainer Rings - Steel
Meets ASTM C-1231 and AASHTO T-22 specifications.
Retainer Rings
These plated, high-alloy steel rings hold neoprene pad caps that fit into the ends of concrete test cylinders. The steel resists rust and deformation fatigue. Bearing surfaces machine-planed to within 0.002". Sold two per set.
Pad Caps
These inserts are made from a tough elastomeric material that evens out and fills irregularities in the ends of concrete cylinders to assure even distribution of test loads for consistent results. Sold individually.
- Requirements for use of neoprene pads:
Compressive Strength, psi:
Less than 1,500, not permitted
1,500 to 6,000, 50 durometer
2,500 to 7,000, 60 durometer
4,000 to 7,000, 70 durometer
7,000 to 12,000, 70 durometer with qualification testing
Greater than 12 000, not permitted
