碱渣掺量对固废基胶凝材料性能的影响

doi:10.16552/j.cnki.issn1001-1625.2025.0015

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (7): 2597-2607.DOI: 10.16552/j.cnki.issn1001-1625.2025.0015

碱渣掺量对固废基胶凝材料性能的影响

李志全^1,2, 张广田^3,4, 张艳佳^3,4, 贾彪^1,2, 刘东基^3,4, 张彪^1,2

1.唐山三友化工股份有限公司,唐山 063305;
2.河北省纯碱碱渣减量与资源化技术创新中心,唐山 063305;
3.河北省建筑科学研究院有限公司,石家庄 050021;
4.河北省固废建材化利用科学与技术重点实验室,石家庄 050021

收稿日期:2025-01-23 修订日期:2025-02-08 出版日期:2025-07-15 发布日期:2025-07-24
通信作者: 张广田,博士,高级工程师。E-mail:syzx1206@163.com
作者简介:李志全(1973—),男,高级工程师。主要从事化工机械研究、优化与管理、废渣资源化利用的研究。E-mail:543336227@qq.com
基金资助:
河北省重大科技成果转化专项(23283801Z);中央引导地方科技发展资金项目(自由探索类基础研究)(246Z3806G);重点实验室建设补助经费(246790147H)

Effect of Alkali Residue Content on Properties of Solid Waste-Based Cementitious Materials

LI Zhiquan^1,2, ZHANG Guangtian^3,4, ZHANG Yanjia^3,4, JIA Biao^1,2, LIU Dongji^3,4, ZHANG Biao^1,2

1. Tangshan Sanyou Chemical Co., Ltd, Tangshan 063305, China;
2. Hebei Province Soda Ash Reduction and Resource Utilization Technology Innovation Center, Tangshan 063305, China;
3. Hebei Provincial Institute of Building Science and Technology Co., Ltd, Shijiazhuang 050021, China;
4. Hebei Province Science and Technology Key Laboratory of Solid Waste for Building Materials, Shijiazhuang 050021, China

Received:2025-01-23 Revised:2025-02-08 Published:2025-07-15 Online:2025-07-24

摘要/Abstract

摘要： 采用碱渣、矿渣、钢渣和脱硫石膏制备固废基胶凝材料,考察了碱渣掺量对固废基胶凝材料标准稠度、凝结时间、流动度、抗压强度的影响规律,并通过XRD、TG-DSC、SEM-EDS测试手段,对比分析了水泥、固废基胶凝材料的水化产物及微观结构,探究了碱渣对固废基胶凝材料水化产物和微观结构的影响。结果表明:碱渣能够提高胶凝材料标准稠度,降低胶砂流动度;碱渣最佳掺量为15%(质量分数),此时胶凝材料标准稠度为28.4%,初凝时间为292 min,终凝时间为359 min,1 d抗压强度为7.1 MPa,3 d抗压强度为27.4 MPa,7 d抗压强度为36.4 MPa,28 d抗压强度为49.6 MPa。碱渣中的氯盐和硫酸盐能够加速胶凝材料早期水化反应进程,生成较多的Friedel's盐、钙矾石(AFt)和水化硅(铝)酸钙(C-(A)-S-H)凝胶,使早期强度提高;后期水化产物不断生成,相互穿插、搭接,形成致密结构,保证了胶凝材料后期强度增长。

关键词: 碱渣, 胶凝材料, 凝结时间, 抗压强度, 水化产物, 微观结构

Abstract: In this paper, alkali residue, slag, steel slag and desulfurization gypsum were used to prepare solid waste-based cementitious materials. The effect of alkali slag content on the standard consistency, setting time, fluidity and compressive strength of solid waste-based cementitious materials was investigated. The XRD, TG-DSC and SEM-EDS test methods were used to compare and analyze the hydration products and microstructure of cement and solid waste-based cementitious materials. The effect of alkali residue on the hydration products and microstructure of solid waste-based cementitious materials was investigated. The results show that the alkali residue can increase the standard consistency of cementitious materials and reduce the fluidity. The optimum content of alkali residue is 15% (mass fraction). At this time, the standard consistency of cementitious materials is 28.4%, the initial setting time is 292 min, the final setting time is 359 min, the 1 d compressive strength is 7.1 MPa, the 3 d compressive strength is 27.4 MPa, the 7 d compressive strength is 36.4 MPa and the 28 d compressive strength is 49.6 MPa. The chloride and sulfate in alkali residue can accelerate the early hydration reaction process of cementitious materials, and generate more Friedel's salt, ettringite (AFt) and calcium aluminosilicate hydrate (C-(A)-S-H) gel, so that the early strength is improved. The later hydration products are continuously generated, interspersed and overlapped to form a dense structure, which ensures the later strength growth of cementitious materials.

Key words: alkali residue, cementitious material, setting time, compressive strength, hydration product, microstructure

中图分类号:

TU526

李志全, 张广田, 张艳佳, 贾彪, 刘东基, 张彪. 碱渣掺量对固废基胶凝材料性能的影响[J]. 硅酸盐通报, 2025, 44(7): 2597-2607.

LI Zhiquan, ZHANG Guangtian, ZHANG Yanjia, JIA Biao, LIU Dongji, ZHANG Biao. Effect of Alkali Residue Content on Properties of Solid Waste-Based Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2597-2607.

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碱渣掺量对固废基胶凝材料性能的影响

Effect of Alkali Residue Content on Properties of Solid Waste-Based Cementitious Materials

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