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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。
Taking the application of recycled aggregate concrete in the frame structure as the engineering background, the regeneration and common concrete members distributed symmetrically in the frame structure are monitored for a long time, and the feasibility of applying the recycled aggregate concrete to different types of components is analyzed. In the laboratory, the in-situ pouring regeneration and ordinary aggregate concrete compressive strength were tested. Long-term comparative monitoring of concrete strain on recycled and common aggregate concrete beams, slabs and columns was carried out on site. The results show that the recycled aggregate concrete with the optimal mix ratio is slightly lower than ordinary aggregate concrete. When recycled aggregate concrete is applied to all kinds of solid components, the early age resistance is caused by the shrinkage effect However, the capacity of recycled aggregate concrete to resist deformation due to load and temperature changes is inferior to that of ordinary aggregate concrete. The strain of recycled aggregate concrete components is similar to that of ordinary components. The recycled aggregate concrete Can be applied to the frame structure of beams, plates, columns and other components.