固化剂与糯米浆固化土的工程性能对比分析

Comparative Analysis on Engineering Performance of Stabilized Soil with Curing Agent and Glutinous Rice Slurry

[目的]通过分别掺入离子固化剂、糯米浆对工业废料铁尾矿砂与黄土混合土进行固化试验,研究对比两种固化剂对目标土样的固化效果差异,为后续的工程应用及研究提供理论支持。[方法]采用离子固化剂与糯米浆分别对目标混合土进行固化研究,通过干湿、冻融循环试验和自然风化试验对试件抗压强度的改变,综合评价两种固化剂对试件强度和耐久性的影响,并根据扫描电镜试验与比表面积试验测得孔隙结构对强度的影响。[结果]掺入1.5%离子固化剂的混合土强度改善效果优于其他掺量的离子固化剂改良土,比素土提升50%强度;掺入10%糯米浆的混合土强度使素土强度增加110%。经过耐久性试验之后,掺入1.5%离子固化剂的混合土强度损失率更小,掺入10%糯米浆的混合土强度残余更高。[结论]离子固化剂与糯米浆作为固化剂,均可提升土体材料的强度性能。糯米浆作为固化剂的固化效果优于离子固化剂。

[Objective] The a curing test of industrial waste iron tailings sand and loess mixed soil by adding an ionic curing agent or a glutinous rice slurry was conducted, and the curing effects of the two curing agents on the target soil sample were compared in order to provide theoretical support for subsequent engineering application and research. [Methods] An ionic curing agent and a glutinous rice paste were used to solidify the target mixed soil. The influence of the two curing agents on the strength and durability of the soil specimen was comprehensively evaluated through changes in the compressive strength of the soil specimen through dry-wet, freeze-thaw cycles and natural weathering tests. The influence of pore structure on compressive strength was measured using a scanning electron microscope and a specific surface area test. [Results] The strength increasing effect of mixed soil with a 1.5% ionic curing agent was better than that of other ionic curing agents, and was 50% greater than that of untreated soil. The strength increasing effect of soil mixed with 10% glutinous rice pulp was greater than observed for other rates of glutinous rice pulp mixed with soil, and the strength of the treated soil increased by 110%. After the durability test, the strength loss rate of soil mixed with the 1.5% ionic curing agent was smaller, and the residual strength of soil mixed with 10% glutinous rice pulp was greater. [Conclusion] Both the ionic curing agent and the glutinous rice pulp treatments can increase the strength performance of soil materials. Glutinous rice paste could be better curing agent than the ionic curing agent.