矿渣风积沙混凝土力学性能试验研究

王尧鸿; 曹建勋; 姜丽云; 董伟; 张宇

doi:10.13204/j.gyjzG21052108

矿渣风积沙混凝土力学性能试验研究

doi: 10.13204/j.gyjzG21052108

王尧鸿^1,2,
曹建勋¹,
姜丽云^1,2, ,,
董伟³,
张宇¹

1. 内蒙古工业大学土木工程学院, 呼和浩特 010051;
2. 内蒙古自治区土木工程结构与力学重点实验室, 呼和浩特 010051;
3. 内蒙古科技大学土木工程学院, 内蒙古包头 014010

基金项目:

国家自然科学基金项目(51868059)。

详细信息

作者简介:
王尧鸿,男,1981年出生,副教授。

通讯作者:
姜丽云,jiang_liyun@126.com。

计量
- 文章访问数: 78
- HTML全文浏览量: 8
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-21

Experimental Research on Mechanical Properties of Concrete Mixed with Slag and Aeolian Sand

1. School of Civil Engineering, Inner Mongolia University of Technology,Hohhot 010051, China;
2. Key Laboratory of Civil Engineering Structure and Mechanics, Inner Mongolia University of Technology, Hohhot 010051, China;
3. College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

摘要

摘要: 为了研究矿渣和风积沙对混凝土强度的影响,设计制作了一批单掺矿渣(取代率为0%~30%)替代等质量的水泥、单掺风积沙(取代率为0%~30%)替代等质量的河沙和复掺矿渣(取代率为30%)、风积沙(取代率为0%~30%)替代等质量的水泥和河沙的混凝土试块,对其进行抗压强度、劈裂强度、抗折强度试验研究,以及通过拉拔试验对不同风积沙取代率的矿渣风积沙混凝土黏结强度进行对比研究,并采用扫描电镜(SEM)对混凝土微观结构形貌进行分析。结果表明:单掺矿渣和风积沙情况下,风积沙对混凝土抗压强度和劈裂强度提高的作用比矿渣更显著,但矿渣和风积沙取代率的提高会使混凝土抗折强度降低;复掺矿渣和风积沙能够有效提高混凝土的抗压强度、劈裂强度以及混凝土与钢筋间的黏结强度,其中,矿渣和风积沙的取代率均为30%时,混凝土的力学性能相对较好。
- 矿渣 /
- 风积沙 /
- 混凝土 /
- 强度 /
- 微观结构
Abstract: In order to study the influence of slag and aeolian sand on the strength of concrete, a batch of single-mixed slag (replacement ratios from 0% to 30%) was designed to replace cement of equal masses in initial concrete and single-mixed aeolian sand (replacement ratios from 0% to 30%) to substitute river sand of equal masses in initial concrete, and mixed slag (a replacement ratio of 30%) and mixed aeolian sand (replacement ratios from 0% to 30%) in the same time to respectively substitute the equal masses of cement and river sand, and the compressive strength, splitting strength, flexural strength and pull-out tests were conducted to compare the effect of slag and aeolian sand on concrete in different replacement ratios. Scanning electron microscope (SEM) was used to analyze the concrete microstructure. The results showed that when slag and aeolian sand were mixed separately, the effect of aeolian sand on the improvement of the compressive strength and splitting strength of concrete was more significant than that of slag, but with the increase of the replacement ratio of slag or aeolian sand, the flexural strength of concrete decreased. The combined action of slag and aeolian sand could effectively improve the compressive strength, splitting strength of concrete and the bonding strength between concrete and steel bars. When the replacement ratios of slag and aeolian sand were 30%, the mechanical property of concrete was better.
- slag /
- aeolian sand /
- concrete /
- strength /
- micro structure

HTML全文

参考文献(15)

[1]	申向东,邹欲晓,薛慧君,等.风积沙掺量对冻融-碳化耦合作用下混凝土耐久性的影响[J].农业工程学报,2019,35(2):161-167.
[2]	王尧鸿,楚奇,韩青.库布齐风积沙对各分级河砂的填充效应[J].建筑材料学报,2021,24(1):191-198.
[3]	杨维武,陈云龙,刘海峰,等.沙漠砂高强混凝土力学性能研究[J].混凝土,2014(11):100-102.
[4]	陈民,韦雪琼.矿物添加剂对混凝土力学性能的影响[J].混凝土,2019(11):127-131.
[5]	时宇,朱金华,和德亮,等.矿物掺合料对混凝土力学性能与开裂趋势的影响[J].硅酸盐学报,2019,47(11):1605-1610.
[6]	施惠生,许碧莞,阚黎黎.矿渣微粉对混凝土气体渗透性及强度的影响[J].同济大学学报(自然科学版),2008(6):782-786.
[7]	董伟,肖阳,苏英,等.风积沙混凝土轴心受压力学性能研究[J].工程科学与技术,2020,52(3):86-92.
[8]	杨斌,盛彬,王珺卓,等.粉煤灰与矿渣在单掺和复掺情况下对混凝土强度的影响研究[J].中外公路,2017,37(3):212-215.
[9]	李玉根,张慧梅,刘光秀,等.风积砂混凝土基本力学性能及影响机理[J].建筑材料学报,2020,23(5):1212-1221.
[10]	何静,申向东,董伟,等.风积沙掺量对水泥砂浆力学性能和微观结构的影响[J].硅酸盐通报,2015,34(9):2609-2613.
[11]	中华人民共和国住房和城乡建设部.混凝土结构试验方法标准:GB/T 50152-2012[S].北京:中国建筑工业出版社,2012.
[12]	中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB/T 50010-2010[S].北京:中国建筑工业出版社,2010.
[13]	惠存,王文迪,杨子胜,等.钢筋与钢纤维再生混凝土黏结滑移性能试验研究[J].混凝土,2020(9):77-81.
[14]	张泽平,王尧鸿,楚奇,等.风积沙混凝土与钢筋的黏结性能试验研究[J].混凝土与水泥制品,2020(6):17-21.
[15]	朱亚鹏,余亮,吕健,等.粉煤灰与矿渣对混凝土物理力学性能及耐久性能的影响[J].武汉大学学报(工学版),2018,51(增刊1):130-134.