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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (4): 1256-1265.DOI: 10.16552/j.cnki.issn1001-1625.2025.0972

• 资源综合利用 • 上一篇    下一篇

粉煤灰与水库淤泥制备烧结砖及性能研究

张世瑜1(), 周阳1,2(), 李志强1(), 陈雨闲1, 周树斌1, 楚永焱1, 沈鹏程1   

  1. 1.石河子大学水利建筑工程学院,石河子 832003
    2.新疆兵团水科院有限公司,乌鲁木齐 830000
  • 收稿日期:2025-10-03 修订日期:2025-11-12 出版日期:2026-04-20 发布日期:2026-05-14
  • 通信作者: 周阳,博士,副教授。E-mail:zhougroup@shzu.edu.cn;
    李志强,博士,教授。E-mail:zhiqiangli2023@163.com
  • 作者简介:张世瑜(1999—),男,硕士研究生。主要从事固体废弃物资源化利用的研究。E-mail:1470819878@qq.com
  • 基金资助:
    兵团重点科技攻关项目(2024AB074)

Fabrication and Performance of Sintered Bricks from Fly Ash and Reservoir Sediment

ZHANG Shiyu1(), ZHOU Yang1,2(), LI Zhiqiang1(), CHEN Yuxian1, ZHOU Shubin1, CHU Yongyan1, SHEN Pengcheng1   

  1. 1.College of Water Conservancy & Architectural Engineering,Shihezi University,Shihezi 832003,China
    2.Xinjiang Corps Hydraulic Research Institute Co. ,Ltd. ,Urumqi 830000,China
  • Received:2025-10-03 Revised:2025-11-12 Published:2026-04-20 Online:2026-05-14

摘要:

为解决水库淤泥与粉煤灰堆存造成的环境污染与资源浪费问题,本研究以夹河子水库淤泥为原料、粉煤灰为调质剂,采用模压成型法制备烧结砖试件,研究粉煤灰掺量和烧结温度对烧结砖体积密度、体积变化率、吸水率和抗压强度的影响,并结合TG-DSC、XRD及SEM分析其作用机理。结果表明:烧结温度的升高使所有烧结砖试件的抗压强度和体积密度增大、吸水率减小;粉煤灰掺量的增加使烧结试件的体积密度降低、吸水率升高。所有烧结砖试件的体积随烧结温度的升高均呈先膨胀后收缩的趋势,但其体积变化率与粉煤灰掺量呈负相关。随粉煤灰掺量增加,烧结砖试件的抗压强度在1 000 ℃时持续下降,在1 050~1 100 ℃时则呈先升后降趋势。微观分析表明:烧结温度的升高促进了熔融玻璃相的生成并形成更致密的微观结构,同时促进钠长石、钙长石及透辉石晶相的形成,从而提高烧结砖试件的抗压强度并降低吸水率。研究成果为高强、低成本的全固废基烧结砖工业化生产提供理论依据。

关键词: 水库淤泥, 粉煤灰, 烧结砖, 烧结温度, 微观分析, 体积变化率

Abstract:

To address environmental pollution and resource waste caused by reservoir sediment and fly ash stockpiling, this study used Jiahezi reservoir sediment as the raw material and fly ash as an modifier to fabricate sintered brick specimens by compression molding. The influences of fly ash content and sintering temperature on bulk density, volumetric change rate, water absorption and compressive strength were investigated, while the underlying mechanisms were elucidated by TG-DSC, XRD, and SEM analyses. Results show that increasing sintering temperature enhances compressive strength and bulk density while reducing water absorption across all sintered brick specimens. Conversely, higher fly ash content decreases the bulk density but increases the water absorption of sintered brick specimens. All sintered brick specimens exhibit an initial expansion followed by contraction as the sintering temperature increases. The volumetric change rate is negatively correlated with the fly ash content. At 1 000 ℃, compressive strength of sintered brick specimens continuously decreases with increasing fly ash content. In the range of 1 050~1 100 ℃, however, compressive strength increases first and then decreases. Microstructural analysis reveals that elevated sintering temperatures promote the formation of molten glass phase, resulting in a denser microstructure and facilitating crystallization of albite, anorthite, and diopside minerals, thereby enhancing compressive strength and reducing water absorption. These findings provide theoretical foundations for the industrial production of high-strength, low-cost sintered bricks entirely based on solid wastes.

Key words: reservoir sediment, fly ash, sintered brick, sintering temperature, microstructural analysis, volumetric change rate

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