Concrete suppliers and contractors are sometimes accused of producing or placing low-strength concrete. While low-strength concrete does occasionally occur, many times reported cylinder strengths are ...

So that it may be certain that a concrete specimen’s mechanical properties reach the strength and deflection imperatives for its intended use, concrete specimens with specific dimensions are prepared, ...

Figure 1. ASTM D8287 sandwich CAI test fixture and specimen. Photo Credit, all images: Dan Adams Damage tolerance testing of composites refers to the testing of specimens with a centrally located ...

Contractors need to know how to correctly evaluate the in-place strength of concrete so they can determine to proper time to remove formwork, backfill or open up a pavement to traffic. Concrete must ...