ASTM C109 (Standard Test Methods for Compressive Strength of Hydraulic Cement Mortars)

ASTM C109 is a standard procedure used to measure the compressive strength of mortar made with hydraulic cement. Essentially, it involves creating a set amount of mortar, molding it into standardized cubes or cylinders, and then applying pressure until it crushes. This test helps determine how strong and durable the cement mortar is, which is important for construction quality control. The procedure ensures consistent testing conditions, allowing engineers and builders to compare results accurately and select suitable materials for building safe, long-lasting structures.