The effect of concrete CS modifier content on the freshly mixed and mechanical properties of C30 and C40 concrete was studied.The results show that the fresh workability of C30 and C40 concrete is improved by CS modifier when the cement dosage is reduced by 10％.CS modifier can significantly promote the strength development of C30 and C40 concrete,and the higher the cement content is,the more significant the effect is,and the effect of C40 system is better than that of C30 system.
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