Compressive Strength Test using Accelerated Curing Method 1. After the test specimens (whose 28 days strength to be determined) have been made, store it in moist air of at least 90 percent humidity for 23 hours + 15 min. 2. Cover the specimens with flat steel cover plate to avoid distortion during the use.
Compressive strength test: Compressive strength test,, mechanical test measuring the maximum amount of compressive load a material can bear before fracturing. The test piece, usually in the form of a cube, prism, or cylinder, is compressed between the platens of a compressiontesting machine by a gradually applied load.