再生骨料强化技术研究  

Research on intensifying technique of recycled aggregate

作　　者：杨宁[1] 王崇革[1] 赵美霞[2] 

机构地区：[1]山东省土木工程防灾减灾重点实验室,山东科技大学,山东青岛266510 [2]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《新型建筑材料》2011年第3期45-47,共3页New Building Materials

基　　金：国家科技支撑计划项目(2009BAJ28B02)

摘　　要：在水泥裹骨料工艺的基础上,研究了一种全新的再生骨料强化技术,即通过在再生骨料表面喷洒聚乙烯醇溶液形成聚乙烯醇粘结层,然后在聚乙烯醇粘结层表面再包裹1层水泥形成水泥外壳,从而增加了再生骨料对水泥的粘附力,达到了提高再生混凝土强度的目的。同时,通过试验对聚乙烯醇溶液外裹水泥法和纯水泥浆、水泥浆外掺矿粉、水泥浆外掺硅藻土、水泥浆外掺硅粉等4种不同化学浆液强化法强化的再生骨料及再生混凝土进行了相关物理力学性能的对比分析。结果表明,骨料表面喷洒聚乙烯醇溶液外裹水泥的方法可以提高再生混凝土的立方体抗压强度约22%。On the basis of aggregate wrapping around cement,a new recycled aggregate intensifying technique which sprayed the PVA solution on recycled aggregate surface to form PVA bond course wrapped around cement was studied. It could improve strength of recycled aggregate concrete. Meanwhile,relative analysis on physical and mechanical properties of recycled aggregate and recycled aggregate concrete were carried through intensified test which included PVA solution wrapping around cement, neat cement grout,grout mixed powdered ore, grout mixed diatomite, and grout mixed ganister sand. The results show that PVA solution wrapping around cement can raise cube compressive strength of recycled concrete about 22%.

关 键 词：再生骨料强化 再生混凝土 再生粗骨料 

分 类 号：TU528.041[建筑科学—建筑技术科学] X799.1[环境科学与工程—环境工程]