掺花岗岩石粉砂浆自收缩性能演变规律研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (12): 4360-4367.

掺花岗岩石粉砂浆自收缩性能演变规律研究

陈梅¹, 韩依璇², 张云升³, 胡向楠³, 薛翠真³, 王将华³

1.江苏省交通运输厅公路事业发展中心,南京 210004;
2.苏交科集团股份有限公司,在役长大桥梁安全与健康国家重点实验室,南京 211112;
3.兰州理工大学土木工程学院,兰州 730050

收稿日期:2023-07-03 修订日期:2023-08-14 出版日期:2023-12-15 发布日期:2023-12-12
通信作者: 张云升,博士,教授。E-mail:zhangyunsheng2011@163.com
作者简介:陈梅(1974—),女,高级工程师。主要从事工程材料的研究。E-mail:chenm@jsgl.cn
基金资助:
江苏省交通厅科研项目(2020Y21);国家自然科学基金地区联合基金项目(U21A20150)

Autogenous Shrinkage Performance Evolution Law of Mortar Mixed with Granite Powder

CHEN Mei¹, HAN Yixuan², ZHANG Yunsheng³, HU Xiangnan³, XUE Cuizhen³, WANG Jianghua³

1. Highway Industry Development Center of Jiangsu Provincial Transportation Department, Nanjing 210004, China;
2. State Key Laboratory of Safety and Health of Long Bridges in Service, Sujiaoke Group Co., Ltd., Nanjing 211112, China;
3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Received:2023-07-03 Revised:2023-08-14 Online:2023-12-15 Published:2023-12-12

摘要/Abstract

摘要： 为提高花岗岩石粉利用率,在分析粉磨时间对花岗岩石粉颗粒特征影响规律的基础上,系统研究了花岗岩石粉掺量及粉磨时间对砂浆自收缩性能的影响规律,并采用灰熵法分析了影响掺花岗岩石粉砂浆自收缩性能的主要因素,最后采用微观测试方法揭示花岗岩石粉对砂浆自收缩性能的影响机理。结果表明:随着粉磨时间增加,石粉颗粒细度逐渐增大,粒径小于10 μm的颗粒含量增多,粒径大于40 μm的颗粒含量降低,掺花岗岩石粉砂浆自收缩变形逐渐增大;随着花岗岩石粉掺量增加,砂浆自收缩变形呈先增大后减小的趋势;适当减小粒径小于20 μm的花岗岩石粉颗粒含量,有利于提高掺花岗岩石粉砂浆的自收缩活性指数;花岗岩石粉主要通过影响砂浆内部水化产物种类及数量,进而影响砂浆自收缩变形规律。

关键词: 花岗岩石粉, 砂浆, 自收缩, 颗粒参数, 微结构, 水化产物, 灰熵分析

Abstract: In order to improve the utilization rate of granite powder, based on the analysis of the influence of grinding time on particle characteristics of granite powder, the influences of granite powder dosage and grinding time on autogenous shrinkage performance of mortar were systematically studied. The main factors affecting the self shrinkage performance of mortar with granite powder were analyzed using grey entropy method. Finally, microscopic testing methods were used to reveal the mechanism of the influence of granite powder on self shrinkage performance of mortar. The result show that with the increase of grinding time, the fineness of stone powder particles gradually increases, the content of particles with a particle size less than 10 μm increases, the content of particles with a particle size greater than 40 μm decreases, and the self-contraction deformation of granite-doped stone powder mortar gradually increases. With the increase of granite powder content, the self shrinkage deformation of mortar shows a pattern of increasing first and then decreasing. Appropriately reducing the dosage of granite powder particles with particle size less than 20 μm is beneficial for improving the self shrinkage activity index of mortar mixed with granite powder. The granite powder mainly affects the type and quantity of hydration products inside mortar, thereby affecting its self shrinkage deformation law.

Key words: granite powder, mortar, autogenous shrinkage, particle parameter, microstructure, hydration product, gray entropy analysis

中图分类号:

TU528

陈梅, 韩依璇, 张云升, 胡向楠, 薛翠真, 王将华. 掺花岗岩石粉砂浆自收缩性能演变规律研究[J]. 硅酸盐通报, 2023, 42(12): 4360-4367.

CHEN Mei, HAN Yixuan, ZHANG Yunsheng, HU Xiangnan, XUE Cuizhen, WANG Jianghua. Autogenous Shrinkage Performance Evolution Law of Mortar Mixed with Granite Powder[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4360-4367.

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