不同标准下ECC抗压强度与弹性模量的试验研究

Experimental study on the compressive strength and modulus of elasticity of ECC according to different standards

依据国内三种试验标准规定的试验方法和块型进行了ECC的弹性模量和抗压强度的试验研究。试验结果表明,ECC的抗压强度和弹性模量均存在形状和尺寸效应。ECC与水泥砂浆基材相比,立方抗压强度与轴心抗压强度平均降低5%,而ECC的弹性模量与基材相比总体略有提高。按照不同试验规范方法得到的弹性模量与抗压强度的关系呈现一致的规律,可按线性关系或幂函数关系进行计算。

The elastic modulus and compressive strength of ECC were studied according to different test method and block shape. The results show that the compressive strength and elastic modulus of ECC have both shape and size effect.Compared with the cement mortar base material,the cube and the axial compressive strength of ECC decrease by an average of 5%. The elastic modulus of ECC is slightly higher than that of cement mortar. The relationship between elastic modulus and compressive strength is consistent according to different test specifications,and can be calculated according to the linear relationship or the power function.