石膏矿渣水泥混凝土抗硫酸钠侵蚀性能研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (8): 2844-2850.

石膏矿渣水泥混凝土抗硫酸钠侵蚀性能研究

孔亚宁, 周建伟, 高育欣, 杨文, 余保英, 程宝军

中建西部建设建材科学研究院有限公司,成都 610000

收稿日期:2022-01-26 修回日期:2022-05-18 出版日期:2022-08-15 发布日期:2022-08-30
通讯作者: 高育欣,博士,高级工程师。E-mail:470526380@qq.com
作者简介:孔亚宁(1988—),男,博士,高级工程师。主要从事水泥基材料相关研究。E-mail:kongyaning@cscec.com
基金资助:
2020年度国家重点研发计划“固废资源化”重点专项项目(2019YFC1907200);国家自然科学基金面上项目(52078394);四川省科技计划(2021YJ0530)

Sodium Sulfate Corrosion Resistance of Gypsum Slag Cement Concrete

KONG Yaning, ZHOU Jianwei, GAO Yuxin, YANG Wen, YU Baoying, CHENG Baojun

China West Construction Academy of Building Materials, Chengdu 610000, China

Received:2022-01-26 Revised:2022-05-18 Online:2022-08-15 Published:2022-08-30

摘要/Abstract

摘要： 石膏矿渣水泥具有低水化热、良好抗化学侵蚀性能等优点,是一种低碳绿色胶凝材料。为了明确原材料对石膏矿渣水泥混凝土抗硫酸盐侵蚀性能的影响,对比研究了不同化学组成及活性矿粉制备的石膏矿渣水泥混凝土的强度发展及抗硫酸钠侵蚀性能。结果表明:提高矿粉中Al₂O₃含量可以有效提高石膏矿渣水泥混凝土早期3 d强度;石膏矿渣水泥混凝土在硫酸钠环境下表现出强度软化型劣化;提高水泥用量、降低水灰比可以有效提高低活性矿粉制备的石膏矿渣水泥混凝土的抗硫酸钠侵蚀性能,但不利于高活性矿粉制备的石膏矿渣水泥混凝土的抗硫酸钠侵蚀性能。研究为低活性矿粉制备石膏矿渣水泥混凝土及其寿命预测提供试验数据支撑。

关键词: 石膏矿渣水泥, 混凝土, 化学组成, 硫酸钠侵蚀, 抗压强度, 耐蚀系数

Abstract: Gypsum slag cement with low hydration heat and good chemical erosion resistance is a low carbon dioxide emission green cementitious material. To clearify to the effect of raw materials on the resistance of gypsum slag cement concrete to sulfate attack, the strength development and sodium sulfate corrosion resistance of gypsum slag cement concrete prepared with different chemical composition and active granulated blast furnace slag (GBFS) were studied. The results show that increasing the content of Al₂O₃ in GBFS effectively improves the early 3 d strength of gypsum slag cement concrete. The strength of gypsum slag cement concrete increases first and then decreases in sodium sulfate environment, showing strength softening disadvantage. Increasing the amount of cement and reducing the water to cement ratio effectively improves the sodium sulfate corrosion resistance of gypsum slag cement concrete prepared with low active GBFS, but it is not conducive to the sodium sulfate corrosion resistance of gypsum slag cement concrete prepared with high active GBFS. The research provides experimental data supporting for the preparation of gypsum slag cement concrete with low active GBFS and predicting for its life.

Key words: gypsum slag cement, concrete, chemical composition, corrosion of sodium sulfate, compressive strength, corrosion resistance coefficient

中图分类号:

TQ177.3⁺7

孔亚宁, 周建伟, 高育欣, 杨文, 余保英, 程宝军. 石膏矿渣水泥混凝土抗硫酸钠侵蚀性能研究[J]. 硅酸盐通报, 2022, 41(8): 2844-2850.

KONG Yaning, ZHOU Jianwei, GAO Yuxin, YANG Wen, YU Baoying, CHENG Baojun. Sodium Sulfate Corrosion Resistance of Gypsum Slag Cement Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2844-2850.

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