赤泥/粉煤灰免烧矿物聚合物材料的制备和强度

Preparation and Compressive Strength of Red-mud and Fly Ash Based Non-sintering Geopolymer

以赤泥、粉煤灰为主要原料,采用水玻璃作为碱激发剂,制备出一种具有较高早期强度的免烧成矿物聚合物胶凝材料。通过实验初步探讨了碱激发剂对该矿物聚合物强度发展的影响。利用合适配比的赤泥/粉煤灰胶凝材料作为基质原料,用细沙作骨料,制成了一种赤泥/粉煤灰基矿物聚合物免烧材料。当赤泥的加入量在60%～70%范围时,各组试样的3d抗压强度均在10MPa以上,符合非承重墙体建筑材料的强度MU10级要求。同时本文还对该矿物聚合物材料中胶凝反应机理进行了初步探讨。

The high early compressive strength geopolymer is prepared by using red-mud and fly ash as the main raw materials,adding suitable water glass as alkali exciting agent. Influence of alkali exciting agent to the development of compressive strength of the samples was discussed in this paper. The non-sintering materials were prepared by using silver sand as the aggregate cementing with red-mud and fly ash geopolymer. When adding amounts of red-mud are between 60%-70%,the compressive strength of all samples in the third day is higher than 10 MPa,they satisfy the demand of MU10 high quality for free-bearing wallboard materials. The mechanism of cementing reaction is also discussed briefly.