地质聚合物教材.docVIP

摘 要 本文以钢渣、矿渣为主要原料，采用压制成型的方法，制备地质聚合物。该，制备过程中不需要高温煅烧，几乎不排放CO2，是一种典型的绿色建筑材料。地质聚合物材料应用的主要泛碱。 本文研究了地质聚合物的在 ABSTRACT In this paper, a kind of geopolymer blocks was prepared by slag, sand and steel slag as main raw materials through the compression method to molding. The geopolymer, which can consume a lot of waste, preparation process does not require high temperature calcination, emits virtually no CO2, is a typical green building materials. However, the most important factor of the restriction on apply of geopolymer material is efflorescence problem. Therefore, it is very crucial that we probe the measures about efflorescence suppressed of geopolymer material. Orthogonal test and univariate variables method were used in this paper, Study on the fly ash and zeolite powder on steel / slag based geopolymer efflorescence, mechanical properties and durability improvement were conducted. The results show that, 23.3% steel slag, 15% fly ash, 23.3% pulverized blast furnace slag, 33.3% sand,5% zeolite powder 10% water and activator with 5% NaOH is the optimum formula of the raw materials for the geopolymer. The optimal molding pressure is 20MPa and it should be cured in the curing room.In this ratio, compared to a single mix with 15% fly ash, pH value of the specimen leaching solution (11.31) samples decrease by 1.7% .Compared to a single mix with 15% fly ash, carbonate ion concentration is (1105.7mg/L) ,it was reduced by 23.8%. ,which have a greatest extent efflorescence inhibition of geopolymer.Its 28d compressive strength were best, up to 152MPa. The water and alkali resistance of the samples is better. Softening coefficient is 0.89.Water absorption rate for 1d is 2.95%. When it soaks for 7 days at 0.5wt%, 1wt%, 3wt% NaOH solution,its mass loss rate is 1.31%, 1.44%, 1.24% respectly .And its compressive strength is not only not reduced but increased to some extent. It has a better alkali resistance. Keywords: steel ; slag ; geopolymer; efflorescence 目 录 摘要 I ABSTRACT