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Corresponding Author

李文凯li wen kai

Abstract

To improve the durability of concrete structures, alkali activated materials are introduced in the concrete mix design. Alkali activated material is a new type of cementitious material that is low-carbon and environmentally friendly and can effectively alleviate CO2 emissions during the production of ordinary Portland cement, with its physical, mechanical, and long-term durability properties to be verified. This paper selected alkali activated slag/fly ash composite concrete for research, and conducted tests on slump, water absorption, compressive strength, and resistance to chloride ion penetration of concrete with different slag contents, Na2O contents, water ash ratios, and sand ratios. The results show that with the increasing slag content, the fluidity and water absorption of concrete gradually decrease, while the compressive strength and resistance to chloride ion penetration gradually increase. As the Na2O content increases, the concrete fluidity first decreases and then increases, and the compressive strength and resistance to chloride ion penetration gradually rise, with the gradually decreasing water absorption rate. As the water ash ratio increases, the fluidity and water absorption of concrete gradually grow, while the compressive strength and resistance to chloride ion penetration gradually decrease. As the sand content increases, the fluidity and compressive strength of concrete first increase and then decrease, the water absorption rate gradually increases, and the resistance to chloride ion penetration is not significantly different. The mixing of alkali activated materials can improve the durability of concrete structures.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.039

First Page

216

Last Page

220

Submission Date

April 2025

Reference

[1] 成金华, 尤喆. “山水林田湖草是生命共同体” 原则的科学内涵与实践路径[J]. 中国人口·资源与环境, 2019, 29(2): 1-6. CHENG Jinhua, YOU Zhe. Scientific connotation and practical paths about the principle of ‘taking mountains, rivers, forests, farmlands, lakes, and grasslands as a life community’[J]. China Population, Resources and Environment, 2019, 29(2): 1-6. [2] 陈爱华. 论绿色发展方式和生活方式理念蕴含的生态伦理辩证法[J]. 思想理论教育, 2019(2): 45-49. CHEN Aihua. On the eco-ethical dialectics in the concept of green development mode and lifestyle[J]. Ideological & Theoretical Education, 2019(2): 45-49. [3] 梁健俊, 马玉玮, 黄科, 等. 粉煤灰物理化学性能对碱激发材料的影响[J]. 硅酸盐通报, 2016, 35(8): 2497-2502. LIANG Jianjun, MA Yuwei, HUANG Ke, et al. Influence of the physical and chemical properties of fly ash on the alkali-activated fly ash/slag[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(8): 2497-2502. [4] 黄科, 马玉玮, 郭奕群, 等. 碱激发粉煤灰/矿渣复合体系的性能研究[J]. 硅酸盐通报, 2015, 34(10): 2769-2774. HUANG Ke, MA Yuwei, GUO Yiqun, et al. Properties of alkali-activated fly ash/slag composite system[J]. Bulletin of the Chinese Ceramic Society, 2015, 34(10): 2769-2774. [5] 杨敬斌,方媛,李东旭.碱胶凝材料水化产物 C—A—S— H 与 N—A—S—H 的研究进展[J].硅酸盐通报,2017,36(10):3292-3297. Yang Jingbin, Fang Yuan, Li Dongxu. Research progress on hydration products C-A-S-H and N-A-S-H in alkali-activated cementitious materials[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(10): 3292–3297. [6] 梁健俊.水玻璃模数与矿渣掺量对碱激发粉煤灰/矿渣复合体系的影响[D].广州:广州大学,2017. Liang Jianjun. Effect of Water glass modulus and slag content on alkali-activated fly ash/slag composite system[D]. Guangzhou: Guangzhou University, 2017. [7] 史才军, 张留洋, 张健, 等. 碱激发材料氯离子传输性能测试方法及影响因素研究进展[J]. 材料导报, 2017, 31(15): 95-100. SHI Caijun, ZHANG Liuyang, ZHANG Jian, et al. Advances in testing methods and influencing factors of chloride ion transport properties of alkali-activated materials[J]. Materials Reports, 2017, 31(15): 95-100. [8] 张留洋. 碱激发材料氯离子传输特性及测试方法研究[D]. 长沙: 湖南大学, 2017. ZHANG Liuyang. Study on chloride ion transport characteristics and testing methods of alkali-excited materials[D]. Changsha: Hunan University, 2017. [9] 赵建伟. 碱激发偏高岭土氯离子渗透性研究[D]. 长沙: 长沙理工大学, 2017. ZHAO Jianwei. Study on chloride ion permeability of alkali-activated metakaolin[D]. Changsha: Changsha University of Science & Technology, 2017. [10] 邹向农, 龙俊贤, 陈宇翔, 等. 腐蚀预应力混凝土桥梁抗力退化预测方法[J]. 中外公路, 2019, 39(3): 84-89. Zou Xiangnong, Long Junxian, Chen Yuxiang, et al. Prediction method for resistance degradation of corroded prestressed concrete bridges[J]. Journal of China & Foreign Highway, 2019, 39(3): 84–89. [11] 武越锋, 马昆林, 黄正华, 等. 酸性环境对不同材料组成混凝土侵蚀深度的试验研究[J]. 中外公路, 2019, 39(4): 224-228. Wu Yuefeng, Ma Kunlin, Huang Zhenghua, et al. Experimental study on the erosion depth of concrete with different material compositions in acidic environments[J]. Journal of China & Foreign Highway, 2019, 39(4): 224–228. [12] 马显东, 刘强, 褚保镇, 等. 预制基质客土的强度及渗透性试验研究[J]. 中外公路, 2019, 39(4): 243-247. Ma Xiandong, Liu Qiang, Chu Baozhen, et al. Experimental study on the strength and permeability of prefabricated matrix soil[J]. Journal of China & Foreign Highway, 2019, 39(4): 243–247.

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