A study of the possibility of using TFT-LCD waste glass as an admixture for steam-cured PHC piles Available to Purchase

In the high-tech industry in Korea, the use of thin-film transistor liquid-crystal display (TFT-LCD) glass products has increased significantly in recent years and large amounts of TFT-LCD waste glass are produced during the manufacturing process. This research studied the effect of TFT-LCD waste glass proportions on binder in mortar when added with an appropriate amount of activator. Experiments were conducted to determine the optimal replacement content to ensure that the quality of prestressed high-strength concrete (PHC) products is maintained. The results indicate that the use of TFT-LCD waste glass powder as an admixture for PHC piles was efficient in reducing alkali–silica reaction expansion and increasing workability. The compressive strength of mortars with TFT-LCD waste glass was also improved compared with that of normal mortar, due to the increased amount of calcium silicate hydrates created by pozzolanic reaction between the waste glass and activator. In field tests, the compressive strength of a PHC pile with TFT-LCD waste glass powder was about 3 MPa higher than that of a normal PHC pile. Guidelines are suggested for the recycling of TFT-LCD waste glass in steam-cured concrete products such as PHC piles.