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含城市固体废弃物焚烧（MSWI）粉再生混凝土的抗SO/Cl侵蚀性能及机理研究

Study on SO/Cl Erosion Resistance and Mechanism of Recycled Concrete Containing Municipal Solid Waste Incineration (MSWI) Powder.

作者信息

Dong Yun, Ma Yuanshan, Peng Ningbo, Qiu Jianchun

机构信息

Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, Huai'an 223001, China.

College of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No.1, Nanjing 210098, China.

出版信息

Materials (Basel). 2022 Aug 3;15(15):5352. doi: 10.3390/ma15155352.

DOI:10.3390/ma15155352
PMID:35955289
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9369516/
Abstract

In this paper, the strength characteristics and erosion resistance of solid waste incineration (MSWI) powder were studied. Firstly, the optimum process for the preparation of regenerated powder from MSWI bottom slag by ball milling was determined as follows: rotational speed 350 r/min, time 45 min. The strength activity index of regenerated powder reached the maximum when the substitute content of powder was 30%. Secondly, the semi-erosion method was used to study the strength variation rule of mortar with different content of MSWI powder in semi-immersion of salt solution. It was found that the higher the content of MSWI powder, the greater the anti-erosion coefficient of mortar specimen. Finally, the capillary rise test, crystallization test and capillary pore water absorption test were used to study the total porosity, coarse capillary-pore porosity and fine-capillary pore porosity of concrete containing MSWI powder. The results showed that, with the increase in MSWI powder content, the above pore structure properties were improved. The results revealed the transport and crystallization process of salt solution in concrete mixed with MSWI powder and the mechanism of corrosion resistance.

摘要

本文研究了城市固体废弃物焚烧（MSWI）飞灰的强度特性和抗侵蚀性能。首先，确定了采用球磨法将MSWI底渣制备再生飞灰的最佳工艺：转速350转/分钟，时间45分钟。当飞灰替代量为30%时，再生飞灰的强度活性指数达到最大值。其次，采用半侵蚀法研究了不同MSWI飞灰掺量的砂浆在盐溶液半浸泡状态下的强度变化规律。结果发现，MSWI飞灰掺量越高，砂浆试件的抗侵蚀系数越大。最后，通过毛细吸水试验、结晶试验和毛细孔吸水试验，研究了含MSWI飞灰混凝土的总孔隙率、粗毛细孔孔隙率和细毛细孔孔隙率。结果表明，随着MSWI飞灰掺量的增加，上述孔隙结构性能得到改善。研究结果揭示了盐溶液在含MSWI飞灰混凝土中的传输和结晶过程以及耐腐蚀机理。

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