LCD 폐유리 콘크리트의 염화물 확산에 관한 연구

Abstract

The purpose of this study is to use waste resources and improve the physical properties of concrete by crushing LCD waste glass for which an appropriate recycling method has not been developed and mixing it into concrete. LCD waste glass was pulverized into two sizes with an average particle diameter of 5㎛ and 10㎛ using a ball mill, and cement paste and concrete were produced by substituting 10% and 20%. Cement paste was used for XRD analysis, and concrete was used for compressive strength test, micropore structure test, and repid chloride penetration test. As a result of analyzing the hydrate composition by XRD, the reduction of calcium hydroxide due to LCD substitution was roughly confirmed, and in the result of compressive strength, concrete including LCD powder showed higher strength than OPC, and was up to 24% higher at 5㎛-20%. In addition, the replacement of the LCD powder reduced the size of the pores inside the concrete, and reduced the penetration rate of chloride. The reason for this result is believed to be due to the pozzolanic reaction caused by SiO2 contained in a large amount of waste LCD glass. Calcium hydroxide produced by the hydration reaction reacts with SiO2 to form C-S-H gel, and it is thought that the gel fills the voids in the concrete to increase the compressive strength and prevent the penetration of harmful ions.