废渣基土壤固化剂与不同土质的适应性研究  

Research on the adaptation to different soils with waste residue-based soil solidification agent

作　　者：孟建伟[1] 华苏东[1] 姚晓[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《新型建筑材料》2016年第8期77-80,91,共5页New Building Materials

基　　金：高性能土木工程材料国家重点实验室开放基金资助项目(2015CEM011)

摘　　要：试验采用自主研制的工业废渣基土壤固化剂PS,与水泥-石灰无机固化剂分别对不同地区的黏性土、盐碱土、砂质土、粉质土等4种代表性土壤进行了固化试验。考察了固化土的无侧限抗压强度、水稳性能、抗冻性能。结果表明:PS固化土的各项性能都明显优于水泥-石灰稳定土,固化黏性土的28 d抗压强度高达4.3 MPa;对于盐碱土和砂质土的水冻稳定性改善效果更为优异,对各种土壤具有广泛的适应性。采用XRD和SEM对PS固化土试样进行表征,结果表明,PS固化剂与土壤反应生成的水化硅酸钙、钙矾石的等结晶状产物填充了空隙,起到稳定土壤的作用。Solidification test of four representative soils from different regions of China, including clay, saline soil,sand and silt,were carried with self-made industrial waste residue-based stabilizer PS,which compared with inorganic cement-lime solidifica- tion. The unconfined compression strength,water stability and anti-frost property of solidified soil were analyzed. Results showed that various properties of PS solidified soil were obviously better than that of cement-lime solidified soil,which the compressive strengths at 28 d of clay are above 4.3 MPa. Solidified soil PS has extensive adaptability for a variety of soils with a better im- proved effect for saline soil and sand. The results from the scanning electron microscopy （SEM） and X-ray diffraction （XRD） tests showed that tobermorite and ettringite crystals are generated which fill the interspace and stabilize the soil.

关 键 词：土壤固化剂 无侧限抗压强度 土质 适应性 

分 类 号：TU442[建筑科学—岩土工程]