碱激发胶凝材料及其固化Pb^2＋的试验研究

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Ph^2＋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Pb^2＋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30MPa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（Ph^2＋）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。

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

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.