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不同搅拌方式水泥稳定再生集料的性能研究
作者：万暑1，2，吴超凡3，4，向水生1，2，欧阳添资1，2
（1.湖南省建筑固废资源化利用工程技术研究中心，湖南 长沙 410007；2.湖南云中再生科技股份有限公司，湖南 长沙 410007；3.湖南交通职业技术学院，湖南 长沙 410100；4.湖南省道路与轨道交通绿色建造与数智运维工程技术研究中心，湖南 长沙 410100）
摘要：由于再生集料吸水率大，且表面粗糙、多棱角，导致水泥稳定再生集料混合料在常规的搅拌方式下较难搅拌均匀。主要研究了不同搅拌方式条件对水泥稳定再生集料力学性能、抗冲刷性能和干缩性能的影响。结果表明：采用振动搅拌和分步搅拌比常规搅拌制备的混合料无侧限抗压强度、劈裂强度和弹性模量都有一定程度的提高，且抗冲刷性能和干缩性能均改善；采用分步加振动搅拌对混合料性能的提高效果最佳，与采用常规搅拌时相比，混合料的无侧限抗压强度提高了8%~20%、劈裂强度提高了16%~
33%、干缩减少了30%~39%。
关键词：建筑垃圾；水泥稳定再生集料；搅拌方式；力学性能
中图分类号：TU528.37 文献标识码：A 文章编号：1001-702X（2023）04-0061-05
The research on performance of cement stabilized recycled aggregate under different stirring methods
WAN Shu1，2，WU Chaofan3，4，XIANG Shuisheng1，2，OUYANG Tianzi1，2
（1.Hunan Province Research and Construction Center for Building Solid Waste Utilization Technology，Changsha 410007，China；2.Hunan Yunzhong Recycling Technology Co. Ltd.，Changsha 410007，China；3.Hunan Communication Engineering Polytechnic，Changsha 410100，China；4.Hunan Province Road and Rail Transit Green Construction and Digital Intelligence Operation and Maintenance Engineering Technology Research Center，Changsha 410100，China）
Abstract：Due to the high water absorption rate，rough surface and multi-angle of recycled aggregate，it is difficult for cement-stablilized recycled aggregate mixture to stir uniformly under conventional stirring method. This paper mainly studies the mechanical properties，anti-scour properties and dry shrinkage of cement stabilized recycled aggregates under different stirring methods. Through the studies，it is concluded that the unconfined compressive strength，splitting strength，elastic modulus，anti-scour performance and dry shrinkage performance of mixture produced by vibration stirring and multi-step stirring have been improved to a certain extent. The use of multi-step with vibration stirring has the best effect on improving the performance of the mixture. Compared with using traditional stirring method，the unconfined compressive strength of the mixture is increased by 8%~20%，the splitting strength is increased by 16%~33%，and the dry shrinkage is reduced by 30%~39%.
Key words：construction and demolition waste，cement-stablilized recycled aggregate，stirring methods，mechanical properties