碱激发剂对DS-ECC稳定性的影响

Influence of Alkali Activator on the Stability of DS-ECC

为研究沙漠砂为细集料制备的高韧性水泥基复合材料(DS-ECC)在碱激发剂作用下基本力学性能的稳定性,对碱激发剂作用后的DS-ECC进行基本力学试验,探究不同模数的碱激发剂对立方体抗压强度、单轴拉伸强度、泊松比以及弹性模量稳定性的影响。结果表明:经激发剂处理后,立方体抗压强度、单轴拉伸强度以及极限拉应变数据波动范围均减小、材料稳定性提高;在碱激发剂模数为1.5时,泊松比与弹性模量的值均有提升,但其数据波动范围基本不变,稳定性基本不变。

In order to study the stability of the basic mechanical properties of Desert-Sand Engineered cementitious composite (DS-ECC) prepared from the desert sand as fine aggregate under the action of alkali activator, basic mechanical tests were carried out on DS-ECC after the action of alkali activator, exploring the effects of different modulus alkali stimulants on the cubic compressive strength, uniaxial tensile strength, Poisson’s ratio and the stability of elastic modulus. The results show that after treatment with the activator, the fluctuation range of the cubic compressive strength, uniaxial tensile strength, and ultimate tensile strain data is reduced, and the material stability is improved;when the modulus of the alkali activator is 1.5, the values of Poisson’s ratio and elastic modulus are improved, but the data fluctuation range is basically unchanged, and the stability is basically unchanged.