摘要
以再生骨料混凝土在框架结构中的应用为工程背景,将分布于框架结构对称位置的再生及普通混凝土构件进行长期监测,分析再生骨料混凝土应用于不同类型构件的可行性。在实验室测试原位浇筑的再生与普通骨料混凝土抗压强度,在现场对再生及普通骨料混凝土梁、板、柱构件进行混凝土应变的长期对比监测。分析结果表明:采用优化配合比设计的再生骨料混凝土,其强度略低于普通骨料混凝土;当再生骨料混凝土应用于各类实体构件时,其早龄期抵抗由于干缩效应引起的拉应变的能力优于普通骨料混凝土,但再生骨料混凝土抵抗由于荷载及温度变化引起变形的能力劣于普通骨料混凝土;再生骨料混凝土各类构件应变发展与普通构件相当,再生骨料混凝土可应用于框架结构的梁、板、柱等构件中。
A frame structure which partially utilized recycled aggregate concrete（ RAC） was studied to investigate the performance of recycled and natural concrete components,which were symmetrically distributed,in order to explore the feasibility of the application of RAC in different components. Cubic compressive strength of RAC and natural aggregate concrete（ NAC） were obtained at the laboratory,while the concrete strains in target components,i. e.,beams,slabs and columns,were monitored on the construction site. Test results demonstrate that the compressive strength of RAC by using the optimized mixture proportions is marginally lower than that of NAC. The concrete strains monitored in target components on site show that the tensile strain of concrete resulted from the early-age concrete shrinkage in RAC components is smaller. However, RAC ＇s resistance to deformation induced by loads and temperature fluctuations is inferior to that of NAC. The strain development of RAC components is comparable to that of NAC. Therefore,RAC＇s application in beams,slabs and columns is feasible.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2016年第5期177-184,共8页
Journal of Building Structures
基金
高等学校博士学科点专项科研基金项目(20120101110025)
国家自然科学基金面上项目(51578489)
关键词
再生骨料混凝土框架结构
工程应用
长期监测
应变
recycled aggregate concrete frame structure
real project
long-term monitoring
strain
