碱激发胶凝材料及其固化Pb^(2+)的试验研究  

Test study on alkali-activated cementing materials and their solidification of Pb^(2+)

作　　者：郑娟荣[1] 胡洁[1] 

机构地区：[1]郑州大学土木工程学院,郑州450002

出　　处：《环境工程学报》2009年第4期733-738,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50572096)

摘　　要：对碱激胶凝材料(碱-偏高岭土、碱-矿渣和碱-粉煤灰)与水-水泥体系固化Pb2+进行了试验研究,其中水-水泥体系为对比样。结果表明:对于相同稠度的碱激发胶凝材料,即使Pb2+含量达到2.4%,除了碱-粉煤灰的抗压强度略低外,其他都达到30 MPa以上,满足填埋或做建筑基材的使用要求;与水泥相比,碱激发胶凝材料能显著降低重金属离子(Pb2+)浸出浓度,其规律性与其NH4+交换容量大小的规律性一致,与其固化体的抗压强度的大小没有相关性。The solidification of heavy metal （ Pb^2＋） by alkali-activated cementing materials（alkali-metakaolinite,alkali-slag, alkali-fly ash） and water-cement was studied, in which water-cement acted as a control sample. The results showed that the compressive strengths of hardened alkali-activated cementing material pastes with the same consistency were above 30 MPa except alkali-fly ash even when Pb^2＋ content rose to 2.40% ,which met the demand of base building material or landfill; alkali-activated cementing remarkably decreased Pb^2＋ leaching concentration of the solidification bodies in the light of cement, the decreasing law were identical with law of capacity of NH4^＋ ion exchange of the solidification bodies but were not related to the compressive strengths of solidification bodies materials.

关 键 词：碱激胶凝材料 固化 重金属离子(Pb2+) NH4+交换容量 抗压强度 

分 类 号：O647.314[理学—物理化学]