高强硫铝酸盐水泥基材料固化垃圾焚烧飞灰的试验研究

doi:10.16552/j.cnki.issn1001-1625.2025.0210

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (9): 3280-3287.DOI: 10.16552/j.cnki.issn1001-1625.2025.0210

高强硫铝酸盐水泥基材料固化垃圾焚烧飞灰的试验研究

董发鑫¹, 徐子凡¹, 汪峻峰², 鲁刘磊^2,3, 叶伟开², 尚春静¹

1.防灾科技学院土木工程学院,廊坊 065201;
2.深圳大学土木与交通工程学院,深圳 518061;
3.海南热带海洋学院海洋科学技术学院,三亚 572022

收稿日期:2025-02-26 修订日期:2025-04-16 出版日期:2025-09-15 发布日期:2025-09-19
通信作者: 鲁刘磊,博士,副研究员。E-mail:luliulei521@163.com; 尚春静,博士,教授。E-mail:chunjingshang@163.com
作者简介:董发鑫(1998—),男,硕士研究生。主要从事硫铝酸盐水泥基材料的研究。E-mail:417178622@qq.com
基金资助:
海南省重点研发项目(ZDYF2022SHFZ322);中国工程科技发展战略海南研究院重点咨询研究项目课题(HN-19-XZ-07)

Experimental Study on Solidification of Municipal Solid Waste Incineration Fly Ash Using High-Strength Sulfoaluminate Cement-Based Materials

DONG Faxin¹, XU Zifan¹, WANG Junfeng², LU Liulei^2,3, YE Weikai², SHANG Chunjing¹

1. School of Civil Engineering, Institute of Disaster Prevention, Langfang 065201, China;
2. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518061, China;
3. College of Marine Science and Technology, Hainan Tropical Ocean University, Sanya 572022, China

Received:2025-02-26 Revised:2025-04-16 Published:2025-09-15 Online:2025-09-19

摘要/Abstract

摘要： 垃圾焚烧飞灰(MSWI FA)因富含重金属、二噁英等有害物质,被列入国家危险废物名录,其安全处置是当前环境保护的迫切需求。硫铝酸盐水泥(SAC)以早强、快硬、耐腐蚀及低碳排放优势,成为固化MSWI FA的理想胶凝材料。通过在SAC中掺入5%~20%(质量分数,下同)的MSWI FA制备高强砂浆,研究了不同MSWI FA掺量对固化体力学性能、微观结构及环境安全性的影响。结果表明:当MSWI FA掺量为5%时,砂浆的6 h抗压强度达44.8 MPa,与空白组相比仅降低了3.9%,28 d抗压强度达91.6 MPa,与空白组相比降低了16.2%,且凝结时间缩短了34.9%;当MSWI FA掺量为20%时,砂浆的28 d抗压强度为60.2 MPa,孔隙率为18.0%。微观分析表明,氯离子通过与硫铝酸钙反应生成水铝钙石,抑制钙矾石形成,导致孔隙粗化。此外,各组高强固化体的重金属浸出浓度均满足《生活垃圾填埋场污染控制标准》(GB 16889—2024)限值,且在20%MSWI FA掺量下碳排放较传统硅酸盐水泥降低44.7%,为危险废物资源化与低碳建材开发提供理论可能。

关键词: 垃圾焚烧飞灰, 硫铝酸盐水泥, 孔结构, 重金属浸出, 碳排放

Abstract: Municipal solid waste incineration fly ash (MSWI FA) is included in the national hazardous waste list because it is rich in harmful substances such as heavy metals and dioxins. Its safe disposal is an urgent need for environmental protection. Sulfoaluminate cement (SAC) has become an ideal cementitious material for solidifying MSWI FA due to its advantages of early strength, fast hardening, corrosion resistance and low carbon emission. High-strength mortar was prepared by adding 5%~20% (mass fraction, the same below) MSWI FA into SAC. The effect of MSWI FA content on mechanical properties, microstructure and environmental safety of solidified body was studied. The results show that when the content of MSWI FA is 5%, the 6 h compressive strength of mortar is 44.8 MPa, which is only 3.9% lower than that of blank group. The compressive strength at 28 d is 91.6 MPa, which is 16.2% lower than that of blank group, and the setting time is shortened by 34.9%. When the content of MSWI FA is 20%, the 28 d compressive strength of mortar is 60.2 MPa and the porosity is 18.0%. Microscopic analysis shows that chloride ions react with calcium sulfoaluminate to form hydrocalumite, which inhibits the formation of ettringite and leads to pore coarsening. In addition, the leaching concentration of heavy metals in each group of high-strength solidified body meets the limit value of “Pollution control standard for domestic waste landfill site” (GB 16889—2024), and the carbon emission is 44.7% lower than that of traditional Portland cement at 20% MSWI FA content, which provides a theoretical possibility for the recycling of hazardous waste and the development of low-carbon building materials.

Key words: municipal solid waste incineration fly ash, sulfoaluminate cement, pore structure, heavy metal leaching, carbon emission

中图分类号:

TQ172

董发鑫, 徐子凡, 汪峻峰, 鲁刘磊, 叶伟开, 尚春静. 高强硫铝酸盐水泥基材料固化垃圾焚烧飞灰的试验研究[J]. 硅酸盐通报, 2025, 44(9): 3280-3287.

DONG Faxin, XU Zifan, WANG Junfeng, LU Liulei, YE Weikai, SHANG Chunjing. Experimental Study on Solidification of Municipal Solid Waste Incineration Fly Ash Using High-Strength Sulfoaluminate Cement-Based Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3280-3287.

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高强硫铝酸盐水泥基材料固化垃圾焚烧飞灰的试验研究

Experimental Study on Solidification of Municipal Solid Waste Incineration Fly Ash Using High-Strength Sulfoaluminate Cement-Based Materials

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