活化赤泥基胶凝材料的抗冻融性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (3): 965-976.

所属专题：资源综合利用

活化赤泥基胶凝材料的抗冻融性能研究

李子超, 朱俊阁, 乐红志, 马来君, 赵浩宇, 钟佳意

山东理工大学材料科学与工程学院,淄博 255049

收稿日期:2023-09-25 修订日期:2023-12-01 出版日期:2024-03-15 发布日期:2024-03-27
通信作者: 乐红志,博士,副教授。E-mail:yhz@sdut.edu.cn
作者简介:李子超(1999—),男,硕士研究生。主要从事生态环境材料的研究。E-mail:lzc990827@163.com
基金资助:
山东省科技型中小企业创新能力提升项目(2023TSGC0968);山东省自然科学基金项目(ZR2022QE171)

Freeze-Thaw Resistance of Activated Red Mud Based Cementitious Materials

LI Zichao, ZHU Junge, YUE Hongzhi, MA Laijun, ZHAO Haoyu, ZHONG Jiayi

School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049, China

Received:2023-09-25 Revised:2023-12-01 Online:2024-03-15 Published:2024-03-27

摘要/Abstract

摘要： 赤泥资源化利用对氧化铝行业可持续发展和环境保护具有重要意义。本文以赤泥和热活化赤泥为主要原料与钢渣等多种固废协同制备赤泥基胶凝材料,并对其抗冻融性能进行了研究。分别对养护14和28 d的胶凝材料试样进行冻融试验,用万能试验机、XRD、SEM、工业CT等检测方法对试样冻融前后的强度、物相、显微结构、孔隙率等进行表征,并对冻融损伤机理进行了探究。结果表明,赤泥基胶凝材料冻融前后的质量损失、强度损失、显微结构差异显著。其中,赤泥-普通硅酸盐水泥胶凝材料较其他赤泥基胶凝材料的抗冻性能优异,其养护14 d试件冻融前后的质量损失和强度损失分别为23.68%和50.75%;用热活化赤泥制备的赤泥-钢渣胶凝材料冻融后的质量损失率较冻融前降低了16.30%。

关键词: 冻融损伤, 活化赤泥, 钢渣, 水泥, 胶凝材料

Abstract: The utilization of red mud resources is of great significance for the sustainable development of the alumina industry and environmental protection. The article studied the freeze-thaw resistance of red mud based cementitious materials prepared by red mud and thermally activated red mud as the main raw materials, and various solid wastes as auxiliary materials such as steel slag. The working conducted freeze-thaw experiments on gel samples cured for 14 and 28 d, and characterized the strength, phases, microstructure, porosity of samples before and after freeze-thaw using universal testing machines, XRD, SEM, industrial CT and other detection methods.The freeze-thaw damage mechanism in samples also was discussed based on characterization results. The results show that there are significant differences in mass loss, strength loss and microstructure of cementitious materials prepared by the synergistic method of red mud and different industrial solid wastes before and after freeze-thaw. The freeze-thaw resistance of cementitious material prepared by red mud and ordinary Portland cement is significantly better than that of other red mud solid waste cementitious materials. Its mass loss and strength loss of sample cured for 14 d before and after freeze-thaw are 23.68% and 50.75%, respectively. The mass loss of red mud-steel slag cementitious material prepared from heat-activated red mud was reduced by 16.30% after freeze-thaw compared to that before freeze-thaw.

Key words: freeze-thaw damage, activated red mud, steel slag, cement, cementitious material

中图分类号:

TU528.41

李子超, 朱俊阁, 乐红志, 马来君, 赵浩宇, 钟佳意. 活化赤泥基胶凝材料的抗冻融性能研究[J]. 硅酸盐通报, 2024, 43(3): 965-976.

LI Zichao, ZHU Junge, YUE Hongzhi, MA Laijun, ZHAO Haoyu, ZHONG Jiayi. Freeze-Thaw Resistance of Activated Red Mud Based Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(3): 965-976.

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活化赤泥基胶凝材料的抗冻融性能研究

Freeze-Thaw Resistance of Activated Red Mud Based Cementitious Materials

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