Comparison of calculating methods and applications of different concrete maturity

Abstract

Concrete maturity theory has great potential in practical engineering. In this paper, the calculation and application of the concrete maturity are presented based on the qualitative analysis and quantitative calculations. Firstly, the maturity calculations are summarized by the methods of direct calculation and equivalent age calculation, as well as a theoretical discussion of the advantages and disadvantages of each calculation method. Secondly, the main methods of compressive strength and elastic modulus predicted by the concrete maturity are also summarized, and the calculation accuracy of the main calculation methods is compared with the published test results. Finally, based on actual engineering project, the research on concrete maturity is prospected to clarify the further research direction. The results show that the calculation methods of concrete maturity consist of direct calculation method and equivalent age calculation method, and the equivalent age calculation method is more reasonable in theory. Considering the wide range of construction temperature, the Freiesleben-Hansen equivalent age equation and exponential function prediction equation are recommended to predict the strength and elastic modulus of concrete.