CAJ | 학술논문

研究了脱硫石膏-粉煤灰复合胶凝材料的力学性能及微观结构.结果表明:磨细粉煤灰较原样粉煤灰对脱硫石膏的力学性能有较大的改善,掺加20%磨细粉煤灰可以得到较高强度的脱硫石膏-粉煤灰复合胶凝材料.由超景深显微镜和 XRD 分析推断出:粉煤灰的滚珠效应和骨架作用改善了脱硫石膏的力学性能,但在干燥环境下,粉煤灰的水化反应得不到有效进行,复合胶凝材料的强度主要来源于水化产物CaSO4.2H2O.
연구료탈류석고-분매회복합효응재료적역학성능급미관결구.결과표명:마세분매회교원양분매회대탈류석고적역학성능유교대적개선,참가20%마세분매회가이득도교고강도적탈류석고-분매회복합효응재료.유초경심현미경화 XRD 분석추단출:분매회적곤주효응화골가작용개선료탈류석고적역학성능,단재간조배경하,분매회적수화반응득불도유효진행,복합효응재료적강도주요래원우수화산물CaSO4.2H2O.
This paper studied the mechanical properties and microstructure of FGD gypsum–fly ash composite cementitious material. The results showed that mechanical performance of FGD gypsum was more significantly improved by adding ground fly ash than original one and higher strength of FGD gypsum–fly ash composite cementitious material could be obtained by mixing 20%ground fly ash. By means of super depth field microscope and XRD, we could infer that the fly ash improved mechanical properties of FGD gypsum owing to its ball bearing and skeleton effect. The hydration reaction of fly ash could not progress in dry surroundings, the strength of composite cementitious material mainly come from the hydration body CaSO4?H2O.