ASTM C595 (Standard Specification for Blended Hydraulic Cements)

ASTM C595 is a set of industry standards that define the composition, properties, and performance requirements for blended hydraulic cements. These cements are made by combining traditional Portland cement with supplementary materials like fly ash or slag. The specification ensures that such blended cements meet consistent quality, strength, and durability standards for construction use. It helps manufacturers produce reliable materials and provides engineers and builders confidence that the cement will perform as expected in concrete applications, supporting safe and durable structures.