矿产综合利用2024，Vol.45Issue(2)：81-88,8.DOI:10.3969/j.issn.1000-6532.2024.02.013
活化煤废料替代水泥制备混凝土的基本特性
Basic Characteristics of Concrete Prepared with Activated Coal Powder instead of Cement
摘要
Abstract
This is an article in the field of ceramics and composites.To explore the feasibility of using coal waste to replace cement for concrete preparation,the activated coal slag powder and coal gangue powder were used to replace cement at a ratio of 0％,10％,20％,30％,and 40％to prepare concrete samples and prepare concrete samples.The slump,compressive strength,flexural strength and high-temperature performance were tested,and the results show that:as the substitution ratio increases,the slump,compressive strength and flexural strength all increase first and then decrease;The optimal substitution ratio is 20％～30％.The early strength growth rate of the activated coal slag powder sample is large;while the long-term strength growth rate of the activated coal gangue powder sample is large.When the water-cement ratio=0.45,the compressive strength of the sample increases first and then decreases with the increase of temperature,and reaches the maximum at 100 ℃;when the water-cement ratio=0.5,the compressive strength of the concrete sample increases with the temperature;the hydration cement structure in the interface area of the activated coal slag powder sample is the most,followed by the control group,and the activated coal gangue powder sample is the least.With the increase in temperature,the pores and cracks on the surface of the sample increased significantly and the degree of fracture of the damaged surface gradually increased.关键词
陶瓷及复合材料/混凝土/煤废料/坍落度/强度/耐高温特性Key words
Ceramics and composites/Concrete/Coal waste/Slump/Strength/High temperature resistance分类
矿业与冶金引用本文复制引用
冯娜,崔自治,李永琴,袁飞..活化煤废料替代水泥制备混凝土的基本特性[J].矿产综合利用,2024,45(2):81-88,8.基金项目
银川能源学院校级科研(2023-KY-Y-13) （2023-KY-Y-13）
宁夏回族自治区大学生创新创业训练计划项目"矿物成分改性混凝土的强度研究" （）
