高强混凝土立方体抗压强度的尺寸效应研究

Size Effect on Compressive Strength of High-Strength Concrete Cube

通过大量试验,分别对C60、C80高强混凝土不同尺寸(边长分别为100 mm,150 mm,200 mm)的立方体试件抗压强度进行了统计分析,发现高强混凝土的不同尺寸之间相关性较好,C60混凝土的换算系数fcu,100/fcu,150为0.932,fcu,200/fcu,150为1.066;C80混凝土的换算系数fcu,100/fcu,150为0.919,fcu,200/fcu,150为1.084。高强混凝土尺寸效应比普通混凝土更加显著,这主要与其自身脆性高有关。

This paper conducts statistic analysis on the cube specimen of C60,C80 high strength concrete with different sizes（ length： 100 mm,150 mm,and 200 mm）through experiments respectively. It finds that there is better relevance between different dimensions. The conversion coefficient fcu,200/ fcu,150 of C60 concrete is1. 066 and the conversion coefficient fcu,100/ fcu,150is0. 932,while the conversion coefficient fcu,100/ fcu,150 of C80 concrete is 0. 919 and the conversion coefficient fcu,200/ fcu,150 is 1. 084. The size effect of high strength concrete is more significant than ordinary concrete,which mainly relates to its own high brittleness.