不同来源垃圾焚烧炉渣的理化性质及再生砂浆的强度变异性  

Physical and Chemical Characteristics of Incineration Bottom Ash(IBA)from Different Sources and Strength Variability of IBA Recycled Mortar

作　　者：陈春红 张海燕[1] 张勇刚[3] 唐婷 卜继斌 CHEN Chunhong;ZHANG Haiyan;ZHANG Yonggang;TANG Ting;BU Jibin(State Key Laboratory of Subtropical Building and Urban Science,South China University of Technology,Guangzhou 510640,Guangdong,China;School of Civil Engineering and Architecture,Guizhou Minzu University,Guiyang 550025,Guizhou,China;Guangzhou Environmental Protection Investment Group Building Materials Co.,Ltd.,Guangzhou 510700,Guangdong,China;School of Health Management,Guiyang Institute of Information Science and Technology,Guiyang 550025,Guizhou,China;Guangzhou Pearl River Decoration Engineering Co.,Ltd.,Guangzhou 510060,Guangdong,China)

机构地区：[1]华南理工大学亚热带建筑与城市科学全国重点实验室,广东广州510640 [2]贵州民族大学建筑工程学院,贵州贵阳550025 [3]广州环投建材有限公司,广东广州510700 [4]贵阳信息科技学院健康管理学院,贵州贵阳550025 [5]广州珠江装修工程有限公司,广东广州510060

出　　处：《华南理工大学学报（自然科学版）》2024年第10期87-100,共14页Journal of South China University of Technology(Natural Science Edition)

基　　金：亚热带建筑与城市科学全国重点实验室开放基金资助项目(2022KB13);贵州省高校人文社会科学研究项目(2024RW306);广东省住房和城乡建设厅研究开发项目(2022-K2-043638)。

摘　　要：城市生活垃圾炉渣(IBA)随着垃圾的组成、焚烧工艺和贮存条件等不同而产生较大的异质性,一批再生混凝土(砂浆)有效的配合比对另一批可能无效,导致再生混凝土(砂浆)性能产生较大的离散性,使其应用受到限制。为探究不同来源垃圾焚烧炉渣的异质性及再生砂浆的强度变异性,文中收集了不同焚烧厂以及不同月份来源的共计14批次IBA样品,测试了不同来源IBA试样的理化性质以及再生砂浆的工作性能和抗压、劈裂抗拉强度,统计分析了IBA再生砂浆的强度变异性水平。结果表明:IBA的压碎指标、空隙率、硫化物和氯化物含量均超出了规范关于再生细骨料的要求,不同来源的IBA存在明显的异质性;单一焚烧厂不同月份的IBA以50%取代率配制M_(2)0强度等级以下的再生水泥砂浆时,强度相较于天然骨料砂浆降低不显著,且强度变异性与普通再生骨料混凝土相当,标准差也低于规范建议值,但用于M_(2)0以上再生砂浆时强度降低较多(约23%~32%);两座不同焚烧厂的IBA再生砂浆的抗压强度变异系数较高,建议不同焚烧厂来源的IBA再生砂浆不混合使用。Municipal solid waste incineration bottom ash(IBA)shows large heterogeneity because of different gar⁃bage composition,incineration process and storage conditions.The effective cooperation for one batch of recycled concrete(mortar)may be ineffective for another batch,resulting in large dispersion of recycled concrete(mortar)per⁃formance,which limits its application.In order to explore the heterogeneity of IBA from different sources and the strength variability of recycled mortar,this study collected a total of 14 batches of IBA samples from different incinerators and different monthly sources and tested for their physical and chemical properties.And it investigated the workability,compressive strength,and splitting tensile strength of IBA recycled mortar.Statistical analysis was conducted to assess the level of strength variability in IBA recycled mortar.The test results showed that the crushing index,porosity,sulfide,and chloride content of IBA did not meet the specifications for recycled fine aggregates,and there is significant heterogeneity in IBA from different origins.When the recycled cement mortar below M_(2)0 strength grade is prepared with a substitution rate of 50%IBA which is from a single incineration plant of different months,the strength is not significantly reduced compared with that of natural aggregate mortar,and the strength variability is similar to that of ordinary recycled aggregate concrete and the standard deviation is also lower than the recommended value of the specification.However,when used to prepare the recycled cement mortar above M_(2)0,the reduction in compressive strength was significant(reduced by 23%~32%).Due to higher compressive strength variability of IBA recycled mortars from two different incineration plants,it was not recommended to use IBA recycled mortars from different incineration plants together.

关 键 词：垃圾焚烧炉渣 异质性 再生砂浆 强度 变异性 

分 类 号：TU502[建筑科学—建筑技术科学]