Rate Constant Functions for Strength Development of Concrete

The rate constant for strength of a particular concrete mixture is the initial slope of the relative strength-versus-age curve at constant temperature curing. The form of the rate constant versus temperature function is needed to describe the combined effects of time and temperature on strength development. This study investigates the relationship between the rate constant and curing temperature. Study conclusions are presented that are based on strength gain data for concrete and mortar specimens made with Type I cement and cured at 10, 23, and 40 C.