固化剂与低剂量石灰综合稳定土的应用研究  

Application Research on Soil Stabilized with Firming Agent and Low Dosage Lime

作　　者：刘树堂[1] 毛洪录[1] 高雪池[2] 商庆森[1] 

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]山东省交通厅公路局,山东济南250002

出　　处：《建筑材料学报》2009年第4期487-492,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50708056)

摘　　要：为考察固化剂和低剂量石灰综合稳定土的效果,选择了5种有代表性的土质,采用3种低石灰剂量,拟定了15组配比进行研究.结果表明,固化剂和低剂量石灰对黏性土具有较好的稳定效果,而对粉质土稳定作用小;不同的黏性土其获得的强度不同.由回归分析发现,各龄期稳定土的无侧限抗压强度与土的阳离子交换量之间具有很强的线性关系,阳离子交换量越大,稳定土的无侧限抗压强度越高.与相应剂量的石灰土或固化土相比,固化剂与低剂量石灰综合稳定土的抗渗性能和收缩性能都占明显优势,且其抗冻性能良好.通过试验比较发现,覆盖养生比喷洒固化剂溶液养生的效果好.In order to investigate the effect of firming agent and low dosage of lime on stability of soil five kinds of representative soil and three small dosages of slaked lime were selected to form fifteen mixture compositions with same dosage of firming agent. Test results show that firming agent and low dosage of slaked lime have a positive effect on stabilization of clay, but a little impact on silt, and the strengths of stabilized clay are different for different clays. There is a good linear correlation between the unconfined compressive strength of stabilized soil at different ages and the cation exchange capacity（CEC） of soil. The value of the CEC of soil is higher; the unconfined compressive strength of stabilized soil is higher. Compared with those of the lime soil and the soil solidified by firming agent the anti-permeability and shrinkage properties of the soil stabilized by both lime and firming agent are much better. The anti-freezing performance of the stabilized clay is acceptable and covered curing is better than the curing by spraying firming agent solution.

关 键 词：固化剂 石灰 阳离子交换量 稳定土 无侧限抗压强度 

分 类 号：U418.5[交通运输工程—道路与铁道工程]