机制砂中泥粉对砂浆与混凝土性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (7): 2372-2381.

所属专题：水泥混凝土

机制砂中泥粉对砂浆与混凝土性能的影响

余震^1,2, 孙江涛^1,3, 吴定略^1,3, 卢自立³, 何涛³, 李志堂^1,3, 沈卫国^1,2

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.武汉理工大学材料科学与工程学院,武汉 430070;
3.保利长大工程有限公司,广州 545000

收稿日期:2023-03-23 修订日期:2023-05-03 出版日期:2023-07-15 发布日期:2023-07-25
通信作者: 沈卫国,博士,教授。E-mail:shenwg@whut.edu.cn
作者简介:余震(2000—),男,硕士研究生。主要从事混凝土的研究。E-mail:2798787781@qq.com
基金资助:
保利长大工程有限公司内部课题

Effect of Clay Powder in Manufactured Sand on Properties of Mortar and Concrete

YU Zhen^1,2, SUN Jiangtao^1,3, WU Dinglue^1,3, LU Zili³, HE Tao³, LI Zhitang^1,3, SHEN Weiguo^1,2

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. Poly Changda Engineering Company Limited, Guangzhou 545000, China

Received:2023-03-23 Revised:2023-05-03 Online:2023-07-15 Published:2023-07-25

摘要/Abstract

摘要： 为研究机制砂中泥粉对砂浆和混凝土性能的影响,使用蒙脱土、高岭土、伊利土三种泥粉以不同质量比取代机制砂制备砂浆和混凝土,测试不同种类和含量泥粉下砂浆和混凝土的工作性能、力学性能和耐久性能,并通过X射线衍射(XRD)和压汞法(MIP)分析泥粉种类和含量对砂浆水化产物和孔结构的影响。结果表明,不同种类和含量泥粉的掺入会不同程度地降低砂浆和混凝土的工作性能。伊利土和高岭土在较低掺量下可以提高砂浆和混凝土的力学性能和耐久性能,在较高掺量下会产生负面影响;而蒙脱土在较低掺量下就会降低砂浆和混凝土的力学性能和耐久性能。泥粉的掺入没有明显改变砂浆的主要水化产物种类,砂浆的孔隙率、平均孔径和累计孔体积会随着泥粉掺量的增加而增大。

关键词: 机制砂, 泥粉, 砂浆, 混凝土, 水化产物, 孔结构

Abstract: In order to study the effect of clay powder in manufactured sand on the properties of mortar and concrete, mortar and concrete were prepared by replacing manufactured sand with different mass ratios using montmorillonite, kaolinite and illite. The working performance, mechanical properties and durability of mortar and concrete with different types and content of clay powder were tested. And the effects of clay powder types and content on mortar hydration products and pore structure were analyzed by X-ray diffraction (XRD) and mercury pressure (MIP). The results show that the incorporation of different types and content of clay powder reduces the working performance of mortar and concrete to varying degrees. Illite and kaolinite improve the mechanical properties and durability of mortar and concrete at lower content, and have a negative impact at higher content. Montmorillonite reduces the mechanical properties and durability of mortar and concrete at lower content. The incorporation of clay powder does not significantly change the main hydration product types of mortar, and the porosity, average pore size and cumulative pore volume of mortar increase with the increase of clay powder content.

Key words: manufactured sand, clay powder, mortar, concrete, hydration product, pore structure

中图分类号:

TU528

余震, 孙江涛, 吴定略, 卢自立, 何涛, 李志堂, 沈卫国. 机制砂中泥粉对砂浆与混凝土性能的影响[J]. 硅酸盐通报, 2023, 42(7): 2372-2381.

YU Zhen, SUN Jiangtao, WU Dinglue, LU Zili, HE Tao, LI Zhitang, SHEN Weiguo. Effect of Clay Powder in Manufactured Sand on Properties of Mortar and Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(7): 2372-2381.

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机制砂中泥粉对砂浆与混凝土性能的影响

Effect of Clay Powder in Manufactured Sand on Properties of Mortar and Concrete

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