热焖钢渣对水泥胶凝材料力学性能影响的研究
Study on the Effect of Hot-stewed Steel Slag on the Properties of Cementitious Materials
任卫岗 1田尔布 2饶婕 1邓明伟 1王春芳 1张发兵2
作者信息
- 1. 江西建设职业技术学院,江西南昌 330200
- 2. 三明学院建筑工程学院,福建三明 365004
- 折叠
摘要
钢渣具有一定的胶凝性能,可作为混凝土掺合料,但处理工艺对其具有重要影响.目前多数研究针对的是非热焖工艺钢渣,对热焖钢渣的研究较少.文章基于水泥胶砂试验方法,对比研究了热焖钢渣部分取代水泥后的胶砂在标准养护和压蒸条件下的基本力学性能,并采用XRD、FESEM和EDS等技术进行了微观分析.结果表明:在标养条件下,热焖钢渣能够水化生成C3AH6和C-S-H,28 d活性指数达到76％;在压蒸条件下,有片状Tobermorite和纤维状Xonotlite矿物生成,活性指数高达92％,且随着钢渣掺量的增加(总量≤70％),胶砂的抗折强度有提高趋势,而抗压强度呈降低趋势且在70％时显著降低.
Abstract
Steel slag has certain gelling properties and can be used as concrete admixture,but the treat-ment process has an important effect on it.At present,most of the research is aimed at the non-hot-steaming process steel slag,and there are fewer studies on hot-steaming steel slag.Based on the test method of ce-mentitious sand,the basic mechanical properties of cementitious sand after partially replacing cement by hot-steaming steel slag were comparatively studied under standard curing and pressure-steaming conditions,and microanalysis was carried out by XRD,FESEM and EDS.The results show that,under the standard condi-tion,the hot-steamed steel slag can hydrate to generate C3AH6 and C-S-H,and the activity index reaches 76％at 28 d.Under the pressure steaming condition,Tobermorite and Xonotlite minerals are generated,and the activity index is as high as 92％,and with the increase in the dosage of steel slag(the total amount of steel slag is ≤70％),the flexural strength of the mastic sand has a tendency to increase and the compressive strength has a tendency to decrease,and the compressive strength shows a decreasing trend and is signifi-cantly lower at 70％.
关键词
热焖钢渣/压蒸/力学性能/微观分析Key words
hot-stewed steel slag/pressure steaming/mechanical properties/microanalysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据