基于固废的粉土固化材料干缩性能试验研究

Experimental Study on Dry Shrinkage Properties of Solidified Material Based on Solid Waste

为了验证基于固体废物的固化材料对粉土干缩性能的提升作用,采用3种掺量(2%、4%和6%)的固化材料、6%水泥固化土和素土,进行干缩试验对比分析收缩特性。结果表明:掺加基于固体废物的固化材料能明显提高粉土的前期保水能力,失水过程主要发生在试验的前7天,同时能大幅降低粉土的干缩应变和干缩系数,且随着掺量的增加,效果越明显。基于固体废物的固化材料能提高粉土的抗裂性能,为路基路床填料提供了一种新的参考措施,也为固体废物的循环利用提供了一种新的思路。

In order to verify the effect of solidified materials based on solid waste on the dry shrinkage performance of silt, three kinds of solidified materials (2%, 4% and 6%), 6% cement stabilized soil and plain soil were used to carry out dry shrinkage tests to compare and analyze the shrinkage characteristics. The results show that the addition of solidified materials based on solid waste can significantly improve the early water retention capacity of silt, the water loss process mainly occurs in the first 7 days of the test, and can significantly reduce the dry shrinkage strain and dry shrinkage coefficient of silt, and the effect is more obvious with the increase of the content. The solidified material based on solid waste can improve the crack resistance of silt, which provides a new reference measure for subgrade and roadbed filling, and also provides a new idea for the recycling of solid waste.