Experimental study on shrinkage properties of commercial concrete

commercial concrete;  Shrinkage;  Experimental studies

Through the measurement of the shrinkage strain of 180 commercial concrete specimens in 24 groups for 99 consecutive days, the calculation formula of shrinkage strain of commercial concrete under standard conditions was analyzed, and the multi-coefficient shrinkage strain calculation formula of commercial concrete under non-standard conditions was analyzed by multi-coefficient superposition method ε(t)=ε(t)0β1β2β3β4β5. In addition, the calculation formula of shrinkage strain proposed by the experiment is analyzed and compared with the ACI contraction formula, the contraction formula of China Academy of Building Research and the contraction formula of Wang Tiemeng, and the results show that the formula proposed in this paper is more suitable for the calculation of shrinkage strain of commercial concrete.