石膏
水泥
缓速器
烟气脱硫
熟料(水泥)
抗压强度
材料科学
硫酸盐
钙
硅酸盐水泥
废物管理
冶金
复合材料
工程类
作者
G. Tzouvalas,G. Rantis,Σ. Τσίμας
标识
DOI:10.1016/j.cemconres.2004.03.021
摘要
The aim of this paper is to investigate the possible displacement of natural gypsum (CaSO4·2H2O) in cement with an alternative setting retarder, such as the industrial by-product derived from flue gas desulfurization process called FGD gypsum. These calcium-sulfate-bearing materials (CSBM), alone or in mixtures, were ground with clinker both in laboratory and industrial scale to examine their influence on the physical and mechanical properties of cement, as well as on the industrial production line of cement. From the present work, it is extracted that the use of mixtures of sulfate-bearing materials with gypsum seems to be advantageous for the actual control of setting time. The addition of FGD gypsum increases setting time without affecting compressive strength profile. During the industrial trial, the formation of hemihydrate form of calcium sulfate dihydrate has a profound regulatory effect on the setting and strength performance of the cement partially replaced with FGD gypsum.
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