生活垃圾焚烧飞灰用于水泥混凝土的研究进展  

Research progress of domestic waste incineration fly ash used in cement concrete

作　　者：刘星[1] 李碧雄[1] 刘月雷 欧阳金龙[1] 余弦 韩建超 LIU Xing;LI Bixiong;LIU Yuelei;OUYANG Jinlong;YU Xian;HAN Jianchao(College of Architecture and Environment,Sichuan University,Chengdu 610065,China;Sichuan Nengtou Construction Group Co.,Ltd,Chengdu 610065,China)

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川能投建工集团有限公司,四川成都610065

出　　处：《混凝土》2022年第4期93-99,103,共8页Concrete

基　　金：国家自然科学基金(51678379);四川省科技厅应用基础研究项目(2019YJ0131)。

摘　　要：焚烧是生活垃圾处理的主要方式之一。生活垃圾焚烧产生的飞灰含有大量重金属以及高毒性物质二噁英,对人类和生态带来了巨大的危害,妥善处理飞灰成为亟待解决的难题。飞灰具有一定火山灰活性,含有大量氯离子和钠盐,国内外学者尝试将其作为辅助胶凝材料应用于水泥混凝土中,实现“变毒为宝”。围绕飞灰作为辅助性胶凝材料的可行性问题,首先对不同地域飞灰的物理化学性质进行了对比,然后全面综述了国内外已有研究中有关飞灰掺量、预处理方式对混凝土的工作性能、力学性能、耐久性能的影响及机理的相关成果。综合分析认为,飞灰具有一定的火山灰活性,有望作为辅助性胶凝材料,对混凝土性能影响较为复杂,取决于飞灰的理化性质和预处理工艺;对重金属的固化作用效果较为显著。Incineration is one of the main ways of garbage disposal.The fly ash produced by municipal solid waste(MSW)incineration contains a large number of heavy metals and highly toxic substances dioxins,which brings great harm to human and ecology.Proper treatment of fly ash has become an urgent problem to be solved.Fly ash has certain pozzolanic activity and contains a large amount of chloride ion and sodium salt.Scholars at home and abroad have tried to apply fly ash as an auxiliary cementing material in cement concrete to realize“turning poison into treasure”.Around the feasibility of fly ash as the auxiliary cementitious material problem,first of all to different regional chemical and physical properties of fly ash were compared,and then of the existing research both at home and abroad is summarized about the dosage of fly ash,pretreatment method for working properties,mechanical properties and durability of the concrete and the mechanism of the influence of the related results.Comprehensive analysis shows that fly ash has certain pozzolanic activity and is expected to be used as an auxiliary cementing material.The effect of fly ash on concrete performance is complicated,which depends on the physical and chemical properties of fly ash and the pretreatment process.The curing effect of heavy metals is more obvious.

关 键 词：生活垃圾焚烧飞灰 火山灰活性 工作性能 力学性能 耐久性能 重金属固化 

分 类 号：TU528.041[建筑科学—建筑技术科学]