What is the terminology used for the maximum stress at which concrete fails in compression?

The term used for the maximum stress at which concrete fails in compression is compressive strength. In the context of concrete testing, compressive strength measures the ability of concrete to withstand axial loads or pressures applied to it. It is a critical parameter in structural design and is determined through standardized tests, such as the cylinder test, where samples are subjected to increasing loads until failure occurs.

Compressive strength is typically expressed in pounds per square inch (psi) or megapascals (MPa) and is a key factor in determining the load-bearing capacity of concrete structures. The strength is influenced by the mix design, water-cement ratio, curing conditions, and the materials used in the concrete mix. Understanding compressive strength is essential for engineers and technicians as it directly relates to the safety and performance of concrete structures under load.