建筑垃圾再生骨料改性对混凝土性能的影响  

Effect of Modified Construction Waste on the Performance of Concrete

作　　者：邹祥宇[1] 卫学玲[1] 徐峰[1] 刘艳[1] 罗清威[1] Zou Xiangyu;Wei Xueling;Xu Feng;Liu Yan;Luo Qingwei(School of Material Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]陕西理工大学材料科学与工程学院,陕西汉中723000

出　　处：《山东化工》2021年第12期114-116,共3页Shandong Chemical Industry

基　　金：陕西省教育厅项目:建筑垃圾资源化研究及应用(15JK1165);陕西理工大学人才启动项目:建筑垃圾制备新型保温节能墙体材料研究(SLGQD13(2)-18)。

摘　　要：采用硅烷偶联剂和水玻璃对再生细骨料进行表面复合改性,研究改性前后再生细骨料的物理性能及其对再生混凝土性能的影响。结果表明:再生骨料经6%水玻璃和3%硅烷偶联剂浸泡2 h后,吸水率较未改性再生骨料吸水率降低29%,压碎指标值降低到14.3%。由复合改性的再生骨料配制的再生混凝土的7 d、28 d和60 d抗压强度和抗拉强度明显提高,其抗压强度分别达到21.16 MPa,36.49 MPa,42.23 MPa。The effects of surface composite modification of regenerated fine aggregate on physical properties of recycled fine aggregate and performance of recycled concrete were studied by silane coupling agent and sodium silicate.The results show that the recycled fine aggregate were soaked for 2 hours by 6%silane coupling agent and 3%sodium silicate,the water absorption rate was reduced by 29%than that of the untreated one and the crushing index was 14.3%.The compressive strength and tensile strength of 7d,28 d and 60 d of regenerated concrete were greatly improved,the 7d,28 d and 60d compressive strength were 21.16MPa,36.49MPa,42.23 MPa,respectively.

关 键 词：再生细骨料 表面复合改性 硅烷偶联剂 水玻璃 

分 类 号：TU[建筑科学]