Research on Influence of Water-Cement Ratio on Early-Age Shrinkage of Concrete

The influence of different water-cement ratio on early-age autogenous shrinkage and total shrinkage of concrete under dry condition is experimented in this paper.Research results show that the temperature peak value of hydration is higher and the early-age temperature deformation of concrete at the low water-cement ratio is bigger than that of the high water-cement ratio.It is also demonstrated that the autogenous shrinkage,the total shrinkage under dry condition and the ratio of the autogenous shrinkage in total shrinkage of concrete at very early age increase evidently with water-cement ratio decreasing.During 1 day age,the autogenous shrinkage develops rapidly and at a low water-cement ratio,the total shrinkage is mostly attributed to the autogenous shrinkage.