矿渣风积沙混凝土力学性能试验研究  

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

作　　者：王尧鸿[1,2] 曹建勋 姜丽云 董伟[3] 张宇 WANG Yaohong;CAO Jianxun;JIANG Liyun;DONG Wei;ZHANG Yu(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Civil Engineering Structure and Mechanics,Inner Mongolia University of Technology,Hohhot 010051,China;College of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[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

出　　处：《工业建筑》2022年第3期177-182,共6页Industrial Construction

基　　金：国家自然科学基金项目(51868059)。

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。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.

关 键 词：矿渣 风积沙 混凝土 强度 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]