外掺剂对冻融循环水泥土强度影响的试验研究

Experimental study on the strength of cement soil impacted by the mixed agent under the cycling of freeze-thaw

水泥土的缺点是抗冻性差,如何将其应用于季节性冻土区和多年冻土区一直是工程实践面临的一个重大课题。无侧限抗压强度是水泥土最基本、最重要的力学指标,通过室内试验,选择当地几种廉价的建筑材料与工业废料作为外掺剂,通过单掺和复掺试验,分析了这几种外掺剂对水泥土冻融循环前后无侧限抗压强度的影响及其促进作用。冻融循环试验结果表明:水泥土通过添加适量的外掺剂,能够达到提高水泥土强度和抗冻耐久性能的双重作用,并配制了一种以水泥土为主剂的性价比较高的复合水泥土,为外掺剂在寒区水泥土中的应用和工程设计提供理论和试验数据。

The shortcoming of the cement soil is its poor anti-freezing property.It has been a great challenge to use cement soil in the seasonal frozen areas and permafrost zones.Unconfined compressive strength is a fundmental important index.Serveral local cheap construction material and industrial waste are selected as mixed agents to do indoor experiments,the improvement and impacting of the mixed agents to the unconfined compressive strength under cycling of freeze-thaw conditions are analyzed through single agen...