摘要
为了克服水泥能耗高、污染大、碳排放当量高的固有缺陷,开发可替代水泥的新型低碳环保胶凝材料已成为业界共识。通过碱性物质激发富含铝硅酸盐的矿物固废先导组分,在常规条件下制备复合地聚物胶凝材料(CGC),具有清洁利废、绿色低碳、高性能的优势,可望成为新一代无机胶凝材料。基于关键氧化物摩尔比和矿物聚合反应机理,优化CGC多种原料的搭配。通过试验研究,评析先导组分、碱激发组分、水固比、养护介质等关键因素对CGC强度的影响。结果表明:常规方法制备的CGC能满足使用要求;矿渣和偏高岭土占比越高,CGC的强度越高;粉煤灰占比越高,CGC的强度越低;CGC的强度与水玻璃和氢氧化钠的用量呈非线性关系;与标准养护相比,海水浸泡养护造成CGC强度降低约7%。
In order to overcome the defects of Portland cement with its high energy consumption,high pollution and high CO_(2)emission,it has reached a consensus on the development of new low-carbon cementing materials that can replace Portland cement.In this paper,composite geopolymer cement(CGC)was prepared by using alkaline solution to activate multi-componental aluminum silicates under normal conditions.Based on the molar ratio of key oxides and geopolymeric reaction mechanism,the mixture proportions of CGC were designed.The effects of key parameters including precursor,alkali activator,water-solid ratio,curing medium on compressive strength of CGC were discussed.The results showed that the prepared CGC under normal conditions met the usage requirements well.When the contents of slag and metakaolin in the precursor were higher,the strength of CGC was greater.When the content of fly ash was higher,the strength of CGC was lower.The relation between CGC’s strength and the contents of water glass and NaOH was non-monotonic.The strength of CGC specimens immersed in artificial seawater was nearly 7%lower than the one stored in standard conditions.
作者
江晨晖
童慧芝
陈泽锋
江鹏飞
JIANG Chenhui;TONG Huizhi;CHEN Zefeng;JIANG Pengfei(Zhejiang College of Construction,Hangzhou 311231,China;Zhejiang Tongji Vocational College of Science and Technology,Hangzhou 311231,China;Zhejiang Huawei Ready-Mixed Concrete,Co.,Ltd.,Hangzhou 311228,China;Hongrun Construction Group Co.,Ltd.,Shanghai 200235,China)
出处
《工业建筑》
北大核心
2023年第2期190-196,共7页
Industrial Construction
基金
2020年度浙江省基础公益研究计划项目(LGG20E090001)
2021年浙江省中华职业科研项目(ZJCV2021E35)
2019年度浙江建设职业技术学院教研教改项目(JGT201901)
关键词
复合地聚物胶凝材料
抗压强度
先导组分
碱激发组分
配合比
composite geopolymer cement(CGC)
compressive strength
precursor meterial
alkali activator
mixture proportion
