Influence of Wet-milling on Physico-chemical Properties and Strength of Fly Ash
To the mineral admixture with low chemical activity, the fineness is a key factor for its effect. The author manufactures a kind of mineral admixture slurry by means of wet milling with highly efficient stirring mill. The paper presents a study of the effect of wet-milling on physico-chemical properties and strength of fly ash treated by wet-milling. Results indicate that in the process of wet-milling and placement, the surface of the vitreous body of fly ash converts to low polymer, and the structure becomes loose, which improves the second-hydration of mineral admixture slurry. The analysis of laser particle size-distribution shows that the narrow particle size distribution of fly ash treated by wetmilling can improve the compact accumulation of solgel materials. Wet-milling can improve some indexes of fly ash, instead of deteriorating its physicochemical properties. In addition, results show that the difference between the strengths of fly ash treated by dry milling and wet milling respectively is not significant and the strengths are higher than that of raw fly ash. Moreover, the more effective utilization of admixture effect, wet milling is better for super-fine grinding of mineral admixtures than dry milling, which helps the admixture to play its effect.
wet-milling mineral admixture slurry fly ash physical and chemical properties mortar strength
X. Y. He W. Sun X.C. Gan Y. Su M. Yu
School of civil engineer and construction, Hubei University of Technology,Wuhan,430068, China School of civil engineer and construction,Hubei University of Technology, Wuhan, 430068, China Technical Supervision & Research Center for Building Materials Industry, Beijing, 100024,China School of civil engineer and construction, Hubei University of Technology, Wuhan, 430068, China
国际会议
济南
英文
1157-1162
2010-05-09（万方平台首次上网日期，不代表论文的发表时间）