水泥-蔗渣灰-矿粉海砂砂浆的抗压强度与抗氯盐渗透性能研究

doi:10.11896/cldb.23030005

材料导报

2024, Vol. 38

Issue (14): 23030005-10 https://doi.org/10.11896/cldb.23030005

无机非金属及其复合材料

水泥-蔗渣灰-矿粉海砂砂浆的抗压强度与抗氯盐渗透性能研究

莫耀鸿¹, 刘剑辉^1,*, 刘乐平², 陈正¹, 蒋增贵¹, 史才军^3,*

1 广西大学土木建筑工程学院,南宁 530004
2 南宁师范大学化学与材料学院,南宁 530001
3 湖南大学土木工程学院,长沙 410082

Study on Compressive Strength and Chloride Penetration Resistance of Cement-Bagasse Ash-Slag Sea-sand Mortar

MO Yaohong¹, LIU Jianhui^1,*, LIU Leping², CHEN Zheng¹, JIANG Zenggui¹, SHI Caijun^3,*

1 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
2 College of Chemistry and Materials, Nanning Normal University, Nanning 530001, China
3 College of Civil Engineering, Hunan University, Changsha 410082, China

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摘要本工作通过单纯型重心设计方法研究水泥-蔗渣灰(SCBA)-矿粉(BFS)三元胶凝材料组成对流动度、抗压强度、氯离子扩散系数、孔隙结构、水化产物以及体积电导率的影响。研究结果表明:尽管随着蔗渣灰掺量的增加,抗压强度下降,但蔗渣灰能显著降低海砂砂浆的氯离子扩散系数。随着矿粉掺量的增加,海砂砂浆抗压强度略微增加,氯离子扩散系数显著降低。当水泥掺量为70%～75%、蔗渣灰为0%～10%、矿粉为10%～30%时,三元体系海砂砂浆的强度最高,氯离子扩散系数最低。海砂砂浆的抗压强度随着毛细孔体积和最可几孔径的增大而减小,氯离子扩散系数是由孔隙结构与孔隙溶液的化学性质共同决定的。

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	莫耀鸿
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	史才军

关键词: 蔗渣灰矿粉海砂氯离子扩散系数孔隙结构

Abstract: In this work, the effect of cement-bagasse ash(SCBA)-slag (BFS) ternary cementitious on the fluidity, compressive strength, chloride diffusion coefficient, pore structure, hydration products and bulk conductivity of mortar was studied by using simplex centroid design method. The results showed that the compressive strength decreased with the increase of bagasse ash content, but it can significantly reduce the chloride diffusion coefficient of sea-sand mortar. With the increase of the content of slag, the compressive strength increased slightly, and the chloride diffusion coefficient decreased significantly. When the cement content was 70%—75%, bagasse ash was 0%—10%, and slag was 10%—30%, the strength of sea-sand mortar was the highest, and the chloride diffusion coefficient was the lowest. The compressive strength of sea-sand mortar decreased with the increase of capillary pore and the most probable pore diameter. The chloride diffusion coefficient was determined by the pore structure and the chemical properties of pore solution.

Key words: bagasse ash slag sea-sand chloride diffusion coefficient pore structure

出版日期: 2024-07-25 发布日期: 2024-08-12

ZTFLH:

TU528

通讯作者: * 刘剑辉,广西大学土木建筑工程学院副教授、博士研究生导师。主要研究方向为:(1)超高性能混凝土的收缩与控制;(2)二氧化碳养护水泥基材料;(3)固体废弃物的处理与运用。主持国家、省部级课题4项,参与国家重点研发计划、国家自然科学基金面上项目等科研项目3项;发表学术论文40余篇(其中SCI论文25篇)。liujianhui@gxu.edu.cn
史才军,国家第二批“千人计划”特聘专家、湖南省特聘专家、亚洲混凝土联合会主席、湖南大学985工程创新平台首席科学家、特聘教授、博士研究生导师。在水泥和混凝土材料的设计、测试、耐久性、智能防渗漏材料及废物的利用和处置方面做了广泛深入的研究工作,发表高水平学术论文540余篇。出版英文著作8部,中文著作5部,合编国际会议英文论文集11本。2015—2017年“建设与建造”领域中国高被引学者,2016年全球土木工程领域高被引学者,2001年、2007年和2016年分别当选为国际能源研究会、美国混凝土学会及国际材料与结构联合会的会士。cshi@hnu.edu.cn

作者简介: 莫耀鸿,2020年6月毕业于湖南工业大学,获得工学学士学位。现为广西大学土木建筑工程学院硕士研究生,在史才军教授的指导下进行研究。目前主要研究领域为胶凝材料组成在海砂水泥基中的应用。

引用本文:

莫耀鸿, 刘剑辉, 刘乐平, 陈正, 蒋增贵, 史才军. 水泥-蔗渣灰-矿粉海砂砂浆的抗压强度与抗氯盐渗透性能研究[J]. 材料导报, 2024, 38(14): 23030005-10.
MO Yaohong, LIU Jianhui, LIU Leping, CHEN Zheng, JIANG Zenggui, SHI Caijun. Study on Compressive Strength and Chloride Penetration Resistance of Cement-Bagasse Ash-Slag Sea-sand Mortar. Materials Reports, 2024, 38(14): 23030005-10.

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http://www.mater-rep.com/CN/10.11896/cldb.23030005 或 http://www.mater-rep.com/CN/Y2024/V38/I14/23030005

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