ASTM C684-99 (R2003) PDF Download

The ASTM C684-99 (R2003) standard describes four procedures for making, curing, and testing concrete specimens under accelerated strength development conditions. These procedures are: Procedure A - Warm Water Method, Procedure B - Boiling Water Method, Procedure C - Autogenous Curing Method, and Procedure D - High Temperature and Pressure Method.

The standard provides guidelines on how to prepare and cure the concrete specimens using these different methods in order to accelerate the development of strength. The Warm Water Method involves storing the specimens in warm water, while the Boiling Water Method requires immersing the specimens in boiling water. The Autogenous Curing Method involves placing the specimens in sealed containers to allow them to cure under their own internal heat and moisture, while the High Temperature and Pressure Method subjects the specimens to elevated temperatures and pressures.

The purpose of these accelerated curing methods is to simulate and expedite the natural process of concrete strength development. By subjecting the specimens to these controlled conditions, the standard aims to obtain compressive strength values that can be used for quality control and performance evaluation of concrete.