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地质聚合物作为一种新型的绿色胶凝材料,与硅酸盐水泥相比,地质聚合物具有环境友好、耐高温、耐久性好等优点.本实验采用工业固体废物粉煤灰和矿渣,配以石英砂和碱硅酸盐激发剂,制备得到地质聚合物材料.以制品抗压强度为指标,研究了粉煤灰与矿渣复合比、碱硅酸盐激发剂的模数与固含量、以及液胶比对地质聚合物性能的影响规律.结果表明:随着粉煤灰占总胶凝材料比例的增加,体系中CaO的含量降低,地质聚合物的抗压强度逐渐降低;当碱硅酸盐激发剂固含量为32%时,地聚物抗压强度随其模数的增大表现为先增大后减小,当模数为1.2时,试样7d抗压强度达到94.9 MPa;对于液胶比,随液胶比的增大,地聚物的抗压强度先增大后减小,液胶比为0.48时,抗压强度最大.
Geopolymer, as a new type of green cementitious material, has the advantages of environment-friendliness, high temperature resistance and good durability compared with Portland cement.In this experiment, industrial solid waste fly ash and slag The geosynthetic materials were prepared by using quartz sand and alkali silicate as stimulants.The compounding ratio of fly ash to slag and the modulus and solid content of alkali silicate activator were studied based on the compressive strength of the products. The results showed that the content of CaO in the system decreased with the increase of the proportion of fly ash to the total cementitious material and the compressive strength of the geopolymer decreased gradually. When the solid content of salt activator is 32%, the compressive strength of geopolymer increases first and then decreases with the increase of its modulus. When the modulus is 1.2, the compressive strength of sample 7d reaches 94.9 MPa; The ratio of liquid to plastic, with the increase of liquid to plastic ratio, the compressive strength of the geopolymer first increases and then decreases, and the maximum compressive strength when the liquid to rubber ratio is 0.48.