Research on the Influence of Recycled Sand Powder on the Strength of Concrete
This article studies the influence of the replacement rate of recycled sand powder on the mechanical strength of concrete at different ages through experimental scheme design.The results indicate that recycled sand powder can be used to replace some of the cement in the con-crete.When the replacement rate of recycled sand powder is appropriate,although the strength of the concrete may decrease,it can still meet the strength design requirements.The strength of concrete significantly decreases with the increase of the replacement rate of recycled sand pow-der,and the splitting strength of concrete is more sensitive to the content of recycled sand powder.The threshold values for the replacement rate of recycled sand powder for the compressive strength and splitting strength of concrete are 15.0%and 10.0%,respectively.When this value is exceeded,the concrete strength shows a linear smaller trend with the increase of the replacement rate of recycled sand powder.
国家科技期刊平台
NSTL
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