预拌混凝土各龄期抗拉和抗压强度换算关系试验研究

Experimental study on relationships between tensile strength and compressive strength of ready-mixed concrete at different age

对225个混凝土试件分别进行了5个龄期的立方体抗压强度、劈裂抗拉强度和轴心抗拉强度试验研究。在试验数据基础上,回归了60d龄期内各个龄期混凝土的立方体抗压强度与劈裂抗拉强度、轴心抗拉强度以及劈裂抗拉强度与轴心抗拉强度之间的换算公式,公式计算结果与试验结果符合良好,可为防止和控制混凝土结构早期收缩裂缝提供重要强度指标。试验数据可为混凝土规范中有关耐久性条目修订提供参考。

Experimental study on strength indexes is studied. Based on the experimental results, the conversion formulas（ between the compressive strength and the splitting tensile strength, between the compressive and the axial tensile strength, between the splitting tensile strength and the axial tensile strength） at different ages in 60-day are received. The calculation results of the formulas are well identical with the experimental results. The above formulas can supply data and material to the code.