Experimental study on municipal solid waste incineration ash micro-powder as concrete admixture

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Li Hanghang, Shi Dongsheng, Li Hao, Ren Dongdong
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引用次数: 0

Abstract

To improve the utilization rate of municipal solid waste incineration (MSWI) ash and achieve resource recycling, this article conducted research on grinding MSWI ash into fine powder for use as a concrete admixture. Initially, the physical and chemical properties of the MSWI ash micro-powder were tested. Subsequently, different amounts of MSWI ash powder concrete were prepared. The macro and micro properties of the concrete were then tested. Finally, a life cycle assessment was utilized to evaluate and compare ordinary concrete with MSWI ash micro-powder concrete. The results indicate that the chemical composition of the MSWI ash micro-powder is similar to that of cement clinker. It exhibits potential hydraulicity and a slow hydration reaction, making it an active admixture suitable for concrete raw materials. With the increasing proportion of MSWI ash micro-powder, the rate of hydration reaction in concrete slows down, resulting in decreased mechanical properties. The microhardness value of the hardened cement paste in MSWI ash micro-powder concrete is lower than that of ordinary concrete. Moreover, the addition of MSWI ash micro-powder helps mitigate the environmental impact of concrete in terms of non-biological energy loss and CO2 emissions.
城市固体废物焚烧灰微粉作为混凝土外加剂的试验研究
为提高城市固体废弃物焚烧灰的利用率,实现资源循环利用,本文对将城市固体废弃物焚烧灰研磨成细粉用作混凝土外加剂进行了研究。首先,测试了 MSWI 灰微粉的物理和化学性质。随后,制备了不同用量的 MSWI 灰微粉混凝土。然后测试了混凝土的宏观和微观性能。最后,利用生命周期评估对普通混凝土和 MSWI 灰微粉混凝土进行评估和比较。结果表明,MSWI 灰微粉的化学成分与水泥熟料相似。它表现出潜在的水化性和缓慢的水化反应,是一种适用于混凝土原材料的活性外加剂。随着 MSWI 灰微粉比例的增加,混凝土中的水化反应速度减慢,导致力学性能下降。在 MSWI 灰微粉混凝土中,硬化水泥浆的显微硬度值低于普通混凝土。此外,添加 MSWI 灰微粉有助于减轻混凝土在非生物能量损失和二氧化碳排放方面对环境的影响。
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来源期刊
Reviews on Advanced Materials Science
Reviews on Advanced Materials Science 工程技术-材料科学:综合
CiteScore
5.10
自引率
11.10%
发文量
43
审稿时长
3.5 months
期刊介绍: Reviews on Advanced Materials Science is a fully peer-reviewed, open access, electronic journal that publishes significant, original and relevant works in the area of theoretical and experimental studies of advanced materials. The journal provides the readers with free, instant, and permanent access to all content worldwide; and the authors with extensive promotion of published articles, long-time preservation, language-correction services, no space constraints and immediate publication. Reviews on Advanced Materials Science is listed inter alia by Clarivate Analytics (formerly Thomson Reuters) - Current Contents/Physical, Chemical, and Earth Sciences (CC/PC&ES), JCR and SCIE. Our standard policy requires each paper to be reviewed by at least two Referees and the peer-review process is single-blind.
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