建筑垃圾—矿渣地聚合物材料的制备及性能  

Preparation and Properties of Geopolymer Based on Construction Waste-Slag

作　　者：汪海风[1] 刘杰[1] 阙永生[1] 徐意[1] 张鹤[1] 杨辉[1,2] 

机构地区：[1]浙江大学浙江加州国际纳米技术研究院,浙江杭州310058 [2]浙江大学材料科学与工程学院,浙江杭州310027

出　　处：《材料科学与工程学报》2016年第6期895-899,共5页Journal of Materials Science and Engineering

基　　金：国家科技支撑计划资助项目(2014BAL03B01;2014BAL07B02)

摘　　要：以建筑垃圾、矿渣为原料,以硅酸钠为碱激发剂制备地聚合物材料,考察硅酸钠模数、建筑垃圾/矿渣重量比、水胶比及硅酸钠用量等因素对地聚合物初凝时间、抗压强度和抗折强度的影响规律。结果显示:当硅酸钠模数为1.0,建筑垃圾/矿渣重量比为0.5,水胶比为0.26,硅酸钠用量为10%时,地聚合物综合性能最佳:初凝时间65min;7d(28d)抗压强度33.3MPa(45.6MPa);7d(28d)抗折强度6.0MPa(4.5MPa)。SEM分析显示建筑垃圾包覆在地聚合物材料中,界面结合紧密。Geopolymers were prepared using construction waste and slag as starting materials and sodium silicate as alkali activator.The experimental parameters,which affected the initial setting time,compressive strength and flexural strength of geopolymers,were discussed,such as SiO2/Na2 O molar ratio of sodium silicate,construction waste/slag weight ratio,water to binder ratio and sodium silicate amount.The geopolymer exhibits the best properties with initial setting time of 65 min,7d（28d）compressive strength of33.3 MPa（45.6MPa）,7d（28d）flexural strength of 6.0MPa（4.5MPa）when SiO2/Na2 O molar ratio of sodium silicate is 1.0,construction waste/slag weight ratio is 0.5,water to binder ratio is 0.26,and sodium silicate amount is 10%.SEM results demonstrate the structure of geopolymer is dense due to construction waste bonded together tightly.

关 键 词：地聚合物 建筑垃圾 矿渣 强度 初凝时间 

分 类 号：TB332[一般工业技术—材料科学与工程]