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Effects of particle size of liquid crystal glass powder and cement substitution on concrete properties

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Document pages: 12 pages

Abstract: The high-quality liquid crystal display (LCD) waste glass (LPWG) produced in the production process of LCD industry in Korea has the highest technical level and output in the world. It is finely ground into particles smaller than cement particles (finer than OPC) to verify its applicability and performance as a cement substitute. For the concrete mixture with w B ratio of 0.44, LPWG glass powder (LGP) was used instead of cement in the proportions of 5, 10, 15 and 20 (lgp12) and 5 and 10 (lgp5) according to the particle size to prepare cylindrical samples, test the air content and slump in the fresh concrete, and the compressive strength and splitting tensile strength of the hardened concrete. The microstructure of concrete specimens is analyzedzed through Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), and a Mercury Intrusion Porosimetry (MIP). Replacement of cement with LGP for cement could effectively decrease the quantity of cement used due to the excellent performance of LGP. It may positively contribute to the sustainable development of the cement industry as well as waste recycling and environment conservation on a national scale.

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