Study on the Influence of Stone Powder on the Shrinkage and Strength of Recycled Machine-Made Sand Concrete
The recycled machine-made sand concrete has significant economic and environmental benefits.In this paper,the influence of stone powder content on strength and shrinkage performance of the recycled machine-made sand concrete is studied.The results showed that the stone powder can improve the working performance and increase the compressive strength of concrete when its content is less than 9%,and 9%stone powder can in-crease the compressive strength of concrete by about 10%.An appropriate amount of stone powder can reduce the early self-shrinkage of concrete,but there is no obvious correlation between the self-shrinkage of 3 days concrete and the content of stone powder.When the content of stone powder is less than 6%,the dry shrinkage of recycled machine-made sand concrete can be inhibited.The research conclusions provide references for the application of recycled sand concrete.
万方数据
维普
