摘要
废弃混凝土的妥善处置是城镇固体垃圾处理的重要议题,将废弃混凝土进行有效回收并作为再生混凝土再利用被认为是提高建筑垃圾资源化率的有效策略。本研究将水射流引入旧建筑物拆除和废弃混凝土回收领域,研究了水射流拆除旧建筑物回收再生混凝土构件和水射流致裂混凝土回收再生粗骨料的应用潜力,分析了断面粗糙度对于新老混凝土界面连接性能的影响。结果表明:水射流拆除后再生混凝土的剩余强度保留在91%到98%,表明水射流拆除对于混凝土性能的影响是微不足道的。再生混凝土的断面粗糙度保持在1.10~1.31,水射流拆除造成的粗糙表面对于新老混凝土界面的粘结非常有利。水射流冲击下,粗骨料和砂浆能够有效分离,再生粗骨料的附着砂浆含量低于10%。
Proper disposal of waste concrete is an important issue in urban solid waste treatment.It is an effective strategy that improving resource utilization and reducing construction waste by recycling waste concrete.In this work,water jet was introduced into the field of old building demolition and waste concrete recycling.The application potential of the recycled concrete components and the recycled coarse aggregates by water jet demolition was investigated,and the effects of fracture surface roughness on the connection performance of the recycled concrete components were analyzed.The results showed that the residual compressive strength of the recycled concretes after water jet demolition was 91%to 98%,which demonstrated that the effect of water jet demolition was negligible.The fracture surface roughness of the recycled concrete was between 1.10 and 1.31.The rough surface caused by water jet demolition was favorable for the connection performance of recycled concrete components.The coarse aggregates and the cement mortar could be efficient separation under the impact of water jet,and the attached mortar content of the recycled coarse aggregates was less than 10%.
作者
马方乾
王泽峰
潘超
朱佳颖
李俊霖
张子涵
胡格
MA Fangqian(School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430065,Hubei,China)
出处
《水泥》
CAS
2024年第2期41-44,共4页
Cement
基金
湖北省大学生创新创业训练计划项目(S202110488021)
湖北省教育厅科研计划项目(B2022011)
湖北省住房和城乡建设厅科技计划项目(2022070)。
关键词
水射流拆除
再生混凝土
剩余强度
断面粗糙度
再生粗骨料
water jet demolition
recycled concrete
residual strength
fracture surface roughness
recycled coarse aggregate
