以抗弯拉强度为控制指标的道路混凝土配合比设计

作为刚性路面的水泥砼路面,水泥砼的抗弯拉强度远小于抗压强度,因此,决定水泥砼板强度的指标是抗弯拉应力。在道路砼配合比设计时,应以抗弯拉强度为设计指标的计算方法进行。阐述了以抗弯拉强度为设计指标的道路砼的配合比设计方法,结合昆明市高新开发区管网道路路面砼配合比设计及实际使用效果,说明以抗弯拉强度为控制指标来配制道路混凝土是可行且必要的。

Road Cement Concrete Mix Design Based on Flexural Strength

Since cement concrete road is rigid, cement concrete flexural strength is much smaller than the compressive strength, therefore, the decision of cement concrete strength of the indicator is flexural stress. When designing road concrete mixture, we should be based on the design flexural strength index as calculation methods. This paper describes the road concrete mix design based on the flexural strength index. We combined pipe and road surface concrete mix design with the actual result of high-tech development district of Kunming. So we think the way of producing road Cement Concrete feasible and necessary according to the flexural strength.