三元矿物掺和料胶砂试件性能研究
Study on the Properties of Ternary Mineral Admixture Mortar Specimens
张延年 1李加明 2苏艳军 3辛全明 3赵健 4安路明4
作者信息
- 1. 沈阳建筑大学 土木工程学院,辽宁 沈阳 110168;大连交通大学 土木工程学院,辽宁 大连 116028
- 2. 沈阳建筑大学 土木工程学院,辽宁 沈阳 110168
- 3. 中国建筑东北设计研究院有限公司,辽宁 沈阳 110006
- 4. 中铁建大桥工程局集团第四工程有限公司,广东 广州 510000
- 折叠
摘要
为解决煤矸石及钢渣作为单一掺和料强度不足的问题,以煤矸石、钢渣和矿粉为原材料制备复合掺和料水泥砂浆.研究不同配合比下掺和料对水泥砂浆抗压强度的影响,并利用X射线衍射(XRD)、热重-差热分析(TG-DTA)、扫描电镜(SEM)等手段分析不同体系试块的水化机理和微观结构.结果表明,单掺煤矸石、钢渣均表现出较低的活性,而矿粉具有良好的反应活性;三元掺和料中煤矸石-矿粉-钢渣复掺比例为1∶7∶2时,试块的抗压强度最高,28 d抗压强度可以达55.26 MPa.在三元掺和料体系中,煤矸石、矿粉和钢渣可以相互促进水化,增多水化产物,加深水化程度,三者具有一定的耦合作用,具有制备三元矿物掺和料的潜力.
Abstract
In order to solve the problem of insufficient strength of mortar prepared by coal gangue or steel slag,coal gangue,steel slag and mineral powder were used as raw materials to prepare composite admixture cement mortar.The effects of admixtures on the compressive strength of cement mortar under different mixing ratios were studied,and XRD,TG-DTA,SEM were used to test hydration mechanism and microstructure analysis of blocks in different systems.The results showed that the single coal gangue and steel slag showed low activity,while the ore powder had good reactivity.When the mass ratio of coal gangue-mineral powder and steel slag in the ternary admixture was 1∶7∶2,the compressive strength of the test block was the highest,and the compressive strength of the test block could reach 55.26 MPa in 28 d.In the ternary admixture system,coal gangue,mineral powder and steel slag could promote hydration with each other,promoted the increase of hydration products and deepened the degree of hydration,and the three had a certain coupling effect,which had the potential to prepare ternary mineral admixture.
关键词
煤矸石/钢渣/矿粉/掺和料/水化产物/耦合活化Key words
coal gangue/steel slag/mineral powder/admixtures/hydration products/coupling activation引用本文复制引用
基金项目
国家自然科学基金重点项目(52234004)
沈阳市科技计划(22-322-3-04)
出版年
2024
NETL
NSTL
万方数据