TG固化剂水泥石灰稳定土强度及微观结构和固化机理的分析  

Analysis on the Strength and Microscopic Structure of TG Curing Agent Cement Lime Stabilized Soil and Curing Mechanism

作　　者：杨林[1] 匡以寿 

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040

出　　处：《森林工程》2014年第3期143-146,共4页Forest Engineering

基　　金：黑龙江省交通运输厅科技项目(20101018)

摘　　要：以TG固化剂、水泥、石灰3种固化材料为影响因素,它们的剂量为因素水平,7d无侧限抗压强度为考核指标,对稳定土进行正交试验设计,并对试验结果进行极差和方差分析。结果表明:TG固化剂、水泥、石灰均是7 d无侧限抗压强度的显著性因素,可靠度达95%。在保证强度并考虑经济的情况下,对稳定土的配比方案进行优化,最终确定最优方案为TG固化剂∶石灰∶水泥为0.02%∶4%∶4%。同时,对最优配比下的稳定土进行微观结构的观察和固化剂机理的分析得出,当3种固化材料同时加入时,固化效果较好,能形成致密、稳定和高强的胶凝结构,而只加入水泥和石灰时,虽然能够形成团状骨架大颗粒,有一定强度和稳定性,但结构不够致密,不能形成胶凝状结构。Three kinds of curing materials including TG curing agent,cement and lime were treated as the influencing factors, their dosage were the factors and levels,and 7d unconfined compressive strength was as the index,then an orthogonal experimental design was carried out on the stabilized soil. The range and variance analysis were conducted on the test results. Results showed that TG curing agent,cement and lime are the significant factors of 7d unconfined compressive strength,with reliability of 95%. In the case of ensuring the strength and considering the economic,the mix scheme of soil stabilization was optimized as： TG curing agent： lime： cement = 0. 02% ： 4% ： 4%. At the same time,the observation of microscopic structure and the analysis of curing mechanism were carried out on the stabilized soil under the optimal ratio. When the three kinds of curing materials were mixed together at the same time,the curing effect was good with compact,stable and high strength gel structure. However,when only cement and lime were added,although particles of custering skeleton can be formed with certain strength and stability,the structure was not compact enough withouth a gel like structure.

关 键 词：稳定土 微观结构 固化机理 强度 

分 类 号：S773.3[农业科学—森林工程]