生活垃圾焚烧渣细骨料混凝土冻融及自愈试验  

Freeze-thawing and Self-healing Test of Fine Aggregate Concrete with Municipal Solid Waste Incineration Slag

作　　者：石东升[1] 张鹏[1] 姜文超 韩平 马政 SHI Dongsheng;ZHANG Peng;JIANG Wenchao;HAN Ping;MA Zheng(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010000,China;Mengdian Project Construction and Management Branch,Inner Mongolia Electric Power(Group)Co.,Ltd.,Hohhot 010000,China;Xingtai Construction Group Co.,Ltd.,Hohhot 010000,China)

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010000 [2]内蒙古电力(集团)有限责任公司蒙电项目建管分公司,呼和浩特010000 [3]兴泰建设集团有限公司,呼和浩特010000

出　　处：《材料导报》2023年第19期124-128,共5页Materials Reports

基　　金：国家自然科学基金(51868058,52068058);兴泰建设集团研究开发项目(XTXM-RD-01)。

摘　　要：针对生活垃圾焚烧渣量大、难以利用的问题,本工作研究了利用生活垃圾焚烧渣代替天然砂用作混凝土细骨料。选用0.2、0.4、0.6三种水胶比及0%、25%、50%(质量分数)三种代砂率,研究了生活垃圾焚烧渣细骨料混凝土和普通混凝土在不同冻融次数和冻融后自愈的宏观力学性能和微观结构的变化规律。结果表明,随冻融循环次数的增加两种混凝土的抗压强度均逐渐降低,但生活垃圾焚烧渣细骨料混凝土强度降低幅度小于普通混凝土,说明其抗冻融性能优于普通混凝土。经过自愈养护,焚烧渣混凝土与普通混凝土强度均有一定上升,由于垃圾焚烧渣具有一定的潜在水硬性,自愈强度增长率要大于普通混凝土。Aiming at the problem of a large amount of municipal solid waste(MSW)incineration slag and difficult utilization,the research topic of using MSW incineration slag instead of natural sand as the fine aggregate of concrete is proposed.Three water-binder ratios(0.2,0.4 and 0.6)and three sand replacement ratios(0%,25%and 50%)were selected.The change laws of macro-mechanical properties and micro-structure of MSW incineration slag fine aggregate concrete and ordinary concrete under different freeze-thaw cycles and self-healing after freeze-thaw were studied.The results show that the compressive strength decreases gradually with the increase of freeze-thaw cycles,but the strength reduction of MSW incineration slag fine aggregate concrete is less than that of ordinary concrete,indicating that the freeze-thaw resistance is better than that of ordinary concrete.After self-healing curing,the strength of MSW incineration slag concrete and ordinary concrete has a certain increase,because of the potential hydraulic hardness of MSW incineration slag,the growth rate of self-healing strength is greater than that of ordinary concrete.

关 键 词：生活垃圾焚烧渣 混凝土 细骨料 冻融循环 自愈 

分 类 号：TU502[建筑科学—建筑技术科学]