粉煤灰基地聚合物的制备及性能研究

以电厂废渣Ⅱ级低钙粉煤灰为原料，利用碱激发搅拌法制备了粉煤灰基地质聚合物。当水玻璃模数为1.2，nSi/nAl为1.96，养护温度为60℃时，强度最高为41.13 MPa，体积密度为1.66 g/cm3；水玻璃的模数、nSi/nAl、养护温度对地质聚合物的强度、体积密度影响较大，随着参数的增加，抗压强度都表现为先增加后降低的趋势；粉煤灰地质聚合物XRD谱图与原灰相比，在29.508°处出现非晶的漫散射宽峰，且莫来石、石英衍射峰降低，说明地质聚合反应已发生，形成一种“半晶态”物质。

Synthesis and Characterization of Fly Ash-based Geopolymer

AbstractBased on power plant waste residueⅡ level low calcium lfy ash as raw material, lfy ash-based geopolymer was prepared by alkali excitation mixing method. Modulus sodium silicate was 1.2, thenSi/nAl was 1.96, the curing temperature of 60℃, The compressive strength of geopolymer by optimum process was 41.13 MPa, volume density was 1.66 g/cm3; Modulus of sodium silicate,nSi/nAl, curing temperature had a great inlfuence on the strength and bulk density of the geopolymer, with the increase of parameters, the compressive strength was ifrst increased after reducing trend; X-ray Diffraction (XRD) of lfy ash geopolymer compared with the original grey, at 29.508° amorphous non-relfecting wide peak, and mullite, quartz to reduce the diffraction peak, explain geological polymerization has occurred, “semi-crystalline materials” was synthesized.