硅钙渣 脱硫石膏 粉煤灰等固体废弃物制硅酸钙板试验分析-experimental analysis of calcium silicate board made from solid waste such as silica-calcium slag desulfurization gypsum and fly ash.docxVIP

内蒙古科技大学硕士学位论文内蒙古科技大学硕士学位论文IIIIAbstractIn this paper, the calcium silicate sheet as a new kind of building materials was be prepared by calcium silicate slag, flue gas desulfurization gypsum and high-alumina fly ash. All this materials are industrial residues that come from Inner Mongolia tuo county power plant.In this paper, the physical and chemical properties of calcium silicate slag, flue gas desulfurization gypsum and fly ash ware researched, and pretreatment of calcium silicate slag was studied. The autoclaved curing process of silicate slag sheet ware explored. The industrial trial productions meet the requirements in national standard of JC/T 564.2-2008. The microstructure, structure characteristics and generation mechanism of production was tested by XRD, TG-DSC, SEM-EDS and Raman spectrum.The alkalinity of calcium silicate slags were 3.33%. It was approved that mild re-alkali test specimen can be produced under the condition of the calcium silicate slag content of 40%. And fly ash can inhibit the alkali to a certain extent. The alkalinity can be reduced to 1.02% by three times after rinsing.It was approved that the calcium silicate sheet can be produced by desulfurization gypsum, calcium silicon slag, fly ash and cement based on the properties research of those raw materials and related experiments. And the best ratio of components was follows: 50% of calcium silicate slag, 10% of cement, 20% of fly ash, and 20% of desulfurization gypsum.The best conditions of autoclaved curing was 180℃ and 8h according to the conditionexperiment study.The composition of calcium silicon slag and fly ash were complex through the analysis of the microstructure of calcium silicon plate. The XRD analysis shows that the test of calcium silicon plate main ingredients for tobermorite and xonotlite, as well as part of the ettringite, calcium hydroxide, quartz, etc. The SEM test shows that the specimen to generate a large number of xonotlite fibers, ensure the strength of calcium si