回收废旧轮胎集料改性RPC最优配比研究  

Study on the optimal proportion of recycled waste tire aggregate modified RPC

作　　者：钟春玲[1] 颜蒙 张云龙[2] ZHONG Chun-ling;YAN Meng;ZHANG Yun-long(School of civil engineering,Jilin Jianzhu university,Changchun 130118,China;School of transportation science and engineering,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学土木工程学院,长春130118 [2]吉林建筑大学交通科学与工程学院,长春130118

出　　处：《吉林建筑大学学报》2022年第3期39-46,共8页Journal of Jilin Jianzhu University

摘　　要：废旧轮胎中的橡胶集料和钢纤维是活性粉末混凝土(RPC)的优异改性材料,基于响应面法中的Box-Benhnken设计(BBD)实验法,采用废旧轮胎橡胶集料替代部分细集料,以废旧轮胎钢纤维体积掺量、水胶比为因素,以抗压强度、劈裂抗拉强度、流动度为响应来探索在标准养护条件下28 d龄期掺废旧轮胎集料活性粉末混凝土的最优配比.分析结果表明,废旧轮胎钢纤维影响最为显著,具有可靠准确度的最佳配比,废旧轮胎橡胶对机制砂细集料替代量为11.221%,废旧轮胎钢纤维体积掺量为2.206%,水胶比为0.196.Rubber aggregate and steel fiber in waste tires are excellent modified materials of reactive powder concrete( RPC). By using Box-Benhnken design( BBD) experimental method based on response surface, waste tire rubber aggregate is used to replace part of fine aggregate,volume content of waste tire steel fiber and water-binder ratio are taken as factors,and compressive strength,splitting tensile strength and fluidity are taken as responses to explore the optimal proportion of RPC mixed with waste tire aggregate at 28 days under standard curing conditions.The results show that the steel fiber of waste tire has the most significant influence,and the optimal proportion with reliability and accuracy includes:(1)The replacement amount of waste tire rubber to machine-made sand fine aggregate is 11. 221 % .(2)The volume content of steel fiber in waste tires is 2. 206 % .(3)The water-binder ratio is0. 196.

关 键 词：废旧轮胎 RPC 体积掺量 水胶比 

分 类 号：TU755[建筑科学—建筑技术科学]