Abstract：
Specification for Winter Construction of Building Engineering (JGJ/T 104—2011) specifies two maturity-strength curve equations calculated according to equivalent ages and temperature-time product respectively, to deduct the standard value of concrete strength (below 60% of the design strength) at early period. Casio fx-570MS counter is used for regression calculation of two constants ɑ and ｂ in the equations and differences in application of these two equations are analyzed. Detailed calculation methods and procedures of these two equations for deduction of curing strength, temperature-time product and early-removal strength are described after determination of maturity-strength curve equation.
