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《Yellow River》 2015-01
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Study on Modified Feldspathic Stone Composite Materials

DONG Jingliang;WANG Lijiu;ZHANG Liqing;Faculty of Infrastructure Engineering,Dalian University of Technology;  
Feldspathic stone is the main source of the Yellow River sediment. Feldspathic stone when combined with suitable alkali activators can be converted into geopolymer cement to realize the resources utilization of feldspathic stone. This paper studied the water resistance and the change of the water resistant coefficient with the age of Pisha Sandstone after the modified. And also studied the influence of the sodium hydroxide dosage,density of the modified feldspathic stone,slag powder dosage to the compressive strength of the modified feldspathic stone.With 20% slag,2% Na OH and 8% water,the water resistant coefficient of modified feldspathic stone reached 0. 76 at 28 days. With slag content was 40%( by weight),the density of the modified feldspathic stone was 2. 2g / cm3,the alkali activator content was 2%,the 7 days compressive strength of the modified feldspathic stone can reach 32 MPa. In comparison to samples which had no slag,the 7 days compressive strength increased by 602%. SEM and XRD were used to analysis microscopic morphology and reaction products of the modified feldspathic stone. It found a lot of the amorphous minerals which had gelling properties appeared,and the number of micro cracks in modified feldspathic stone were greatly reduced or even disappeared.
【Fund】: “十二五”国家科技支撑计划项目(2013BAC05B03)
【CateGory Index】: TV41
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