Geopolymer is a kind of three-dimensional network structure from non-crystalline to half-crystalline inorganic polymer, synthesized by using aluminosilicate minerals or solid wastes and alkali-activate agent at 20~ 200℃. This paper has mainly studied the rapidly synthetic condition of geopolymer and its resistance to acid and alkali. Orthogonal experiments L9(34) of the raw material proportion of geopolymer were carried out, with the calcination temperature of kaolin, added content of kaolin, water glass and sodium hydroxide as the variable quantity. The optimum raw material proportion is that kaolin is calcined at 600℃ for 4 h, with the mass proportion of kaolin, water glass and sodium hydroxide being 7:4.5:1, and the early compressive strength is the highest: 62.25 Mpa. On the basis of the optimal raw material proportion, the orthogonal experiments L9(34) for the preparation condition of geopolymer were conducted, with solidification temperature, curing temperature and curing time as the variables. The optimal condition was that the mixture was solidified at 60℃ and then cured at 60℃ for 1 h, in which the early compressive strength of geopolymer was 85 Mpa. Geopolymer in 0.5 mol/L HC1, H2SO4 and NaOH solution was soaked for 60 h, mass changes were - 2.03%, - 5.33% and 2.90% .respectively, the compressive strength changes were - 12.68% and 17.07%; When geopolymer in 0.25~l .0 mol/L acid and alkali solution was soaked for 24 h, with the increasing concentration, its mass and compressive strength increased in NaOH solution, changed insignificantly in HC1 solution, and were significantly reduced in H2SO4 solution. The results show that the geopolymer can well resist HCl but its resistance to H2SO4 is poor, while NaOH can promote the compressive strength development of geopolymer.%以高岭土、水玻璃和NaOH为原料,在常压和一定温度下,快速合成矿物聚合物.研究原料配比、固化温度、养护温度和养护时间对矿物聚合物早期抗压强度的发展及矿物聚合物耐HCl、H2SO4和NaOH的腐蚀性.通过2个正交实验得出矿物聚合物的最佳合成条件为:高岭土600℃煅烧4h,m(MK)∶m(水玻璃)∶m(NaOH) =7∶4.5∶1,60℃固化,60℃养护1h,矿物聚合物早期抗压强度可达85 MPa.矿物聚合物耐HCl腐蚀性强,耐H2SO4腐蚀性稍差,NaOH能促进矿物聚合物的早期抗压强度发展.
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