花岗岩石粉细度与砂浆强度灰熵分析

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (6): 16-21.

花岗岩石粉细度与砂浆强度灰熵分析

张云升^*, 胡向楠, 薛翠真

兰州理工大学土木工程学院, 甘肃兰州 730050

收稿日期:2023-03-16 出版日期:2023-12-28 发布日期:2024-01-05
通讯作者: 张云升(1973-),男,河北沧州人,博士,教授.Email:zhangys279@163.com
基金资助:
国家自然科学基金(U21A20150,52108219),甘肃省交通厅科技项目(2020Y21)

Grey entropy analysis of the fineness of granite powder and mortar strength

ZHANG Yun-sheng, HU Xiang-nan, XUE Cui-zhen

School of Civil Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2023-03-16 Online:2023-12-28 Published:2024-01-05

摘要/Abstract

摘要： 为提高机制砂石粉的利用率,在分析花岗岩机制砂石粉(以下简称石粉)掺量和细度对砂浆强度影响规律的基础上,采用灰关联熵分析法研究石粉细度对砂浆强度影响的显著性,并采用SEM分析方法研究石粉对砂浆微观性能的影响.研究表明:随着石粉掺量的增加,砂浆强度呈现先上升后下降的规律.随着石粉的粉磨时间增加,石粉比表面积增大,表现为粒径小于10 μm颗粒含量的增加和大于40 μm颗粒含量的减小.灰熵结果分析表明,石粉的颗粒参数及分布对砂浆强度均有一定的影响,其中比表面积对砂浆强度的影响最为显著,是影响石粉活性的显著因子.10~40 μm的石粉颗粒对砂浆强度的提高是最为有益的.微观分析结果表明,合适掺量及细度的石粉通过改善胶凝体系内部水化产物数量及形貌进而影响砂浆宏观力学性能.

关键词: 花岗岩石粉, 砂浆强度, 细度, 灰关联熵分析, 微观形貌

Abstract: In order to improvethe utilization rate of mechanism sand powder,based on the analysis of the mechanism of granite sand powder (hereinafter referred to as stone), the influence of fineness and dosage of particle characteristics on mortar strength, the significant impact of stone powder fineness on mortar strength was investigated employing the grey relational entropy analysis method. Additionally, the effects of limestone on the micro-properties of mortar were analyzed using scanning electron microscopy (SEM) analysis method. The results showed that the strength of mortar increases first and then decreases with the increase of stone powder content. With the increase of grinding time of stone powder, the specific surface area of stone powder is increased,which is characterized by an increase in particle content with a size of less than 10 μm and a decrease in particle content with a size of greater than 40 μm. The analysis of ash entropy results showed that the particle parameters and particle distribution of stone powder have a certain influence on mortar strength, among which the specific surface area has the most significant effect on mortar strength, which is a significant factor affecting the activity of stone powder. The stone powder in the range of 10~40 μm prove to be the most beneficial for improving the strength of mortar. The results of microscopic analysis showed that the appropriate amount and fineness of stone powder can improve the quantity and morphology of hydration products in the cementitious system, thereby affecting the macroscopic mechanical properties of mortar.

Key words: granite powder, mortar strength, fineness, grey relational entropy analysis, micro-morphology

中图分类号:

TB321

张云升, 胡向楠, 薛翠真. 花岗岩石粉细度与砂浆强度灰熵分析[J]. 兰州理工大学学报, 2023, 49(6): 16-21.

ZHANG Yun-sheng, HU Xiang-nan, XUE Cui-zhen. Grey entropy analysis of the fineness of granite powder and mortar strength[J]. Journal of Lanzhou University of Technology, 2023, 49(6): 16-21.

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