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再生骨料对混凝土性能的影响及其强化技术研究现状

Research on the influence of recycled aggregates on concrete properties and the current situation of strengthening techniques
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摘要 总结了再生骨料的颗粒级配、表观密度、压碎值及吸水率等特性,分析了再生骨料对混凝土工作性能、力学性能、体积稳定性及耐久性能的影响。结果表明,再生骨料较天然骨料表观密度小、吸水率高、压碎值大。探讨了多种再生骨料强化技术,包括机械研磨、热处理、酸处理、微生物强化、碳化强化、矿物掺合料强化、纳米材料改性和聚合物浸渍等方法,并分析了各自的优缺点,以期推动再生骨料的规模化高值利用。 The study summarizes the characteristics of recycled aggregates such as particle gradation,apparent density,crushing value,and water absorption,and analyzes the impact of recycled aggregates on the workability,mechanical properties,volume stability,and durability of concrete.The research indicates that recycled aggregates have defects such as lower apparent density,higher water absorption,and greater crushing value compared to natural aggregates.To address these defects,various strengthening technologies for recycled aggregates are discussed,including mechanical grinding,thermal treatment,acid treatment,microbial reinforcement,carbonation reinforcement,mineral admixture reinforcement,nanomaterial modification,and polymer impregnation,and their respective advantages and disadvantages are analyzed,with the aim of promoting the large-scale and high-value utilization of recycled aggregates.
作者 王稷良 高鹏飞 宝群群 杨占云 WANG Jiliang;GAO Pengfei;BAO Qunqun;YANG Zhanyun(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Research Institute of Highway,Ministry of Transport,Beijing 100088,China;Project Management Branch of Inner Mongolia Communications Group Co.Ltd.,Hohhot 010052,China;Inner Mongolia Road and Bridge Group Co.Ltd.,Hohhot 010051,China)
出处 《新型建筑材料》 2024年第11期11-17,共7页 New Building Materials
基金 内蒙古自治区交通运输科技项目(NJ-2020-28,NJ-2022-13)。
关键词 建筑固废 再生骨料 力学性能 耐久性能 骨料强化 construction solid waste recycled aggregates mechanical properties durability aggregate strengthening
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