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硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (5): 1794-1803.

所属专题: 资源综合利用

• 资源综合利用 • 上一篇    下一篇

熟料-硅锰渣-石灰石复合胶凝材料水化特性研究

李雪莹1, 唐勇2, 潘伟东2, 沈惠明3, 陈霞3, 卢忠远1, 李军1   

  1. 1.西南科技大学环境友好能源材料国家重点实验室,绵阳 621010;
    2.西南水泥有限公司,成都 610000;
    3.四川利森建材集团有限公司,德阳 618400
  • 收稿日期:2022-12-04 修订日期:2023-02-22 出版日期:2023-05-15 发布日期:2023-06-01
  • 通信作者: 李 军,博士,副研究员。E-mail:lijun@swust.edu.cn
  • 作者简介:李雪莹(1997—),女,硕士研究生。主要从事水泥基胶凝材料的研究。E-mail:lxy845781@163.com
  • 基金资助:
    四川省科技计划(2019ZDZX0024);全国建材行业重大科技攻关“揭榜挂帅”项目(20221JBGS02-06)

Hydration Properties of Clinker-Silicomanganese Slag-Limestone Compound Cementitious Materials

LI Xueying1, TANG Yong2, PAN Weidong2, SHEN Huiming3, CHEN Xia3, LU Zhongyuan1, LI Jun1   

  1. 1. State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, China;
    2. Southwest Cement Co., Ltd., Chengdu 610000, China;
    3. Sichuan Lisen Building Materials Group Co., Ltd., Deyang 618400, China
  • Received:2022-12-04 Revised:2023-02-22 Online:2023-05-15 Published:2023-06-01

摘要: 发展低熟料高标号胶凝材料是水泥工业碳达峰目标达成的有效途径之一,但对水泥混合材特性利用及多种混合材协同作用也提出了更高要求。本文以四川地区工业固废硅锰渣和地域资源丰富的石灰石为主要混合材,配制了熟料-硅锰渣-石灰石复合胶凝材料,研究了复合胶凝材料性能及水化特性。研究结果表明,熟料-硅锰渣-石灰石复合胶凝材料工作性良好,后期力学性能增强,且石灰石粉的成核诱导水化效应可有效改善单独使用硅锰渣胶凝材料体系凝结时间延长和早期强度过低问题。复合胶凝材料体系中,石灰石粉的早期成核诱导水化效应和硅锰渣后期水化活性均能得到充分发挥。此外,硅锰渣和石灰石粉能够协同参与胶凝材料体系水化,消耗铝相生成水化碳铝酸盐相,增加水化产物总量,同时也能阻止AFt向AFm转变,有利于体系力学性能稳定提升。

关键词: 硅锰渣, 石灰石粉, 复合胶凝材料, 协同水化作用, 水化碳铝酸盐

Abstract: Developing of high-grade cementitious materials with lower clinker content is one of the most effective ways for the peak carbon dioxide emissions in cement industry, which proposes a higher requirement for the utilization of admixtures and the synergistic effect of different admixtures. In this study, clinker-silicomanganese slag-limestone compound cementitious materials were prepared by using local industrial solid waste silicomanganese slag and a rich resource of limestone in Sichuan province. Properties and hydration characteristics of compound cementitious materials were studied. The results show that the clinker-silicomanganese slag-limestone compound cementitious materials have proper workability and significantly improved later-stage mechanical properties. The problems of prolonged setting time and early strength too low in compound cementitious materials with silicomanganese slag used alone can be effectively improved by the addition of limestone powder. The early nucleation-hydration induction effect of limestone powder and the late hydration activity of silicomanganese slag are fully developed in the clinker-silicomanganese slag-limestone compound cementitious materials system. In addition, synergistical hydration effect of silicomanganese slag and limestone powder can consume aluminum phase to generate the carbonaluminate hydrates, increasing the hydration products and preventing the transformation from AFt to AFm, which is conducive to the stable improvement of the mechanical properties.

Key words: silicomanganese slag, limestone powder, compound cementitious material, synergistic hydration, carbonaluminate hydrate

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