地质聚合物的制备及其在尾矿免烧制品中的应用

采用钢渣和粉煤灰作为原料,加入一定量的碱激发剂,制备出了一种较高强度的地质聚合物胶凝材料。当钢渣与粉煤灰比值为1∶1时,加入10%、模数为1的水玻璃,3d强度为29.20MPa,28d强度可达53.71MPa。并以其作为胶凝材料,以铁矿尾矿粉作为骨料,试制了一种钢渣粉煤灰基地质聚合物胶凝尾矿免烧制品。当尾矿加入量为50%或55%时,各个样品的3d强度均在10MPa以上,最高可达16.24MPa,28d强度均在15MPa以上,最高可达23.43MPa。本文还对胶凝聚合反应机理进行了初步探讨。

The Preparation of High Compressive Strength Geopolymer and Its Application in Non-sintering Tailing Building Materials

The high compressive strength geopolymer is prepared by using steel slag and fly ash,and adding suitable alkali exciting agent.The compressive strength of the third day is 29.20MPa and the compressive strength of the twenty-eighth day is 53.71MPa when the ratio of steel slag and fly ash is 1∶1,and adding 10% water glass of 1 modulus.The non-sintering tailing building materials were prepared by using iron ore tailings as the aggregate cementing with steel slag and fly ash geopolymer.When adding amounts of the tailings are 50% or 55%,the compressive strength of samples in the third day is higher than 10MPa,the highest value is 16.24MPa;the compressive strength of samples in the twenty-eighth day is higher than 15MPa,the highest value is 23.43MPa.The mechanism of cementing reaction is discussed in brief in this paper.