宁夏工程技术2024，Vol.23Issue(1)：48-53,6.
压滤渣粉活性及其对水泥胶砂性能的影响研究
Study on the Activity of Filter Slag Powder in Concrete Batching Plants and Its Effect on the Properties of Cement Mortar
摘要
Abstract
Addressing the resource utilization of filter slag powder in concentrate batching plants,this study analyzed its mineral composition,used chemical titration and thermogravimetric methods to estimate the content of unhydrated cement in the slag,and examined its effects on the water demand and mechanical properties of cement mortar.The results showed that the mineral types in the filter slag powder were stable,and its water demand was higher compared to cement.The mass fraction of unhydrated cement in the slag was about 27.7%after 18 days of storage,indicating low activity.Grinding treatment had a negligible effect on improving the activity of the filter slag powder.Compared to the original filter slag powder,the ground filter slag powder had a minimal effect on improving the compressive strength and flexural strength of cement mortar.The drying shrinkage performance of concrete mixed with finely ground filter slag powder was poorer than the control group,and the drying shrinkage rate reached its maximum at 28 days.After 28 days of standard curing,the surface of the filter slag powder concrete exhibited discontinuous fibrous C-S-H gel,which was disordered and not in a network structure.关键词
压滤渣粉/水泥胶砂/力学性能/需水性/水泥含量Key words
filter slag powder/cement mortar/mechanical property/water demand/cement content分类
土木建筑引用本文复制引用
王宁辉,张晓静,熊梓铭,汪一铖,王德志..压滤渣粉活性及其对水泥胶砂性能的影响研究[J].宁夏工程技术,2024,23(1):48-53,6.基金项目
宁夏回族自治区重点研发计划项目(2022BEE03001) （2022BEE03001）
国家自然科学基金项目(51968060) （51968060）
宁夏自然科学基金项目(2023AAC03040) （2023AAC03040）
