粉煤灰/矿渣复合基沙土固化剂的制备及固化性能研究  

Study on Preparation and Curing Performance of Fly Ash/Slag-based Soil Stabilizer

作　　者：范剑明[1] 李娜[2] 冯鑫国 Fan Jianming;Li Na;Feng Xinguo(Ordos Vocational College,Ordos,Inner Mongolia,China;College of Chemical Engineering,InneT Mongolia University of Technology,Huhhot,Inner Mongolia,China)

机构地区：[1]鄂尔多斯职业学院,内蒙古鄂尔多斯,017010 [2]内蒙古工业大学化工学院,内蒙古呼和浩特,010051

出　　处：《矿产综合利用》2019年第6期105-109,54,共6页Multipurpose Utilization of Mineral Resources

摘　　要：内蒙古库布齐沙漠是中国第七大沙漠,沙土区别于其他沙漠具有特殊理化性能,因而研究针对性的沙土固化剂具有理论与实际应用意义。以内蒙古当地工业固体废弃物,电厂粉煤灰、氯碱化工企业电石渣及金尾矿,利用固体废弃物原料中富含硅铝钙等有效成分,通过单一与复合改性,对固化剂配方进行优化,制备了有机/无机复合新型土壤固化剂。研究结果表明,固化剂优化配方为:粉煤灰(FA)51%、电石渣(CS)17%、金尾矿(GS)15%,CaSO412%、Al2(SO4)33%及甲基纤维素(MC)2%。利用优化配方制备的土壤固化剂以10%比例掺杂在沙土中,固化后沙土试样7 d养护强度最高可达4.62 MPa,超过国家标准。该研究结果实现了"废旧利用、以废治废、以废治沙"的目的,为工程应用提供了参考价值。The Kubuqi desert of Inner Mongolia is the seventh largest desert in China. The sandy soilhave special physical and chemical properties from Inner Mongolia Ku Buqi desert. Therefore, it have a theoretical significance and practical value about the studyofpertinentsandy soilstabilizer. The new soil stabilizer of organic/inorganic-mineral was prepared by the method of single and composite modification, was consisted of calcium, silicon and aluminum residues from local power factory, chlor-alkali chemical factory and mining industry. The text compared and studied the unconfined compressive strength of soil. The results show that the optimized formulation was fly ash(FA) 51%, carbide slag(CS) 17%, gold slag(GS) 15%,CaSO412%, Al2(SO4)33% and methyl cellulose(MC) 2%. The new stabilizer was mixture with sandy soil in 10%. The pressure intensity of samples was up to 4.62 MPa and exceeded the national standardthrough the curing strength of 7 days. The study realized"waste utilization, waste treated waste and waste treated sandy" and provided a theoretical basis for engineering application.

关 键 词：沙土固化剂 粉煤灰 电石渣 金尾矿 

分 类 号：TD989[矿业工程—选矿]