可溶盐作用下水泥稳定花岗岩风化料特性

为了分析水泥稳定花岗岩风化料底基层的病害机理,并优化材料设计,通过3种不同粗集料含量的水泥稳定花岗岩风化料不同养生条件下的材料性能试验,分析了粗集料含量(质量分数)对风化料抗可溶盐腐蚀性能的影响。研究结果表明:长期的水环境,尤其是存在可溶盐腐蚀介质的水环境会导致水泥稳定花岗岩风化料性能的迅速衰减;粗集料含量小于20%时,在可溶盐腐蚀介质的作用下,材料的物理力学性能极差,随着粗集料含量的增加,除标准养生条件下材料的劈裂强度略有降低外,各种条件下的材料性能均得到明显改善;粗集料含量由20%增加到30%,对于改善各种环境下材料的抗压性能和水温稳定性,以及长期水环境下材料的抗拉性能和刚度,效果更为显著;粗集料含量由30%增加到40%,对于改善材料在可溶盐腐蚀环境下的抗拉性能和刚度,效果更为显著。

Properties of cement stabilized weathered granite material under the influence of soluble salt

In order to analyze the disease mechanism of subbase with cement stabilized weathered granite material and to optimize the material design, the influence of coarse aggregate content on soluble salt corrosion resistance was analyzed through properties tests of three kinds of coarse aggregate content cement stabilized weathered granite material under different curing conditions. Research results indicated that long-term water environment, especially soluble salt existing in water environment, would lead to rapid decay of cement stabilized weathered granite material properties. When coarse aggregate content was less than 20%, the material physical mechanic properties were very poor under the effect of soluble salt, but with coarse aggregate content increasing, material properties improved obviously under various conditions except that cleavage strength reduced slightly under standard curing condition. While coarse aggregate content increased from 20% to 30%, the material worked better in improving compressive ability, water and temperature stability under various environment, as well as tensile property and stiffness under long-term water environment. While coarse aggregate content increased from 30% to 40%, tensile property and stiffness improved more obviously under soluble salt corrosion environment.