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The utilization of thin film transistor liquid crystal display waste glass as a pozzolanic material
This investigation elucidates the pozzolanic behavior of WGBC (waste glass blended cement) paste used in TFT-LCD (thin film transistor liquid crystal displays). XRD (X-ray diffraction) results demonstrate that the TFT-LCD waste glass was entirely non-crystalline. The leaching concentrations of the clay and TFT-LCD waste glass all met the current regulatory thresholds of the Taiwan EPA. The pozzolanic strength activity indices of TFT-LCD waste glass at 28 days and 56 days were 89% and 92%, respectively. Accordingly, this material can be regarded as a good pozzolanic material. The amount of TFT-LCD waste glass that is mixed into WGBC pastes affects the strength of the pastes. The strength of the paste clearly declined as the amount of TFT-LCD waste glass increased. XRD patterns indicated that the major difference was the presence of CSH (hydrates of calcium silicate, 2 theta = 32.1 ), aluminate and aluminosilicate, which was present in WGBC pastes. Portland cement may have increased the alkalinity of the solution and induced the decomposition of the glass phase network. WGBC pastes that contained 40% TFT-LCD waste glass have markedly lower gel/space ratios and exhibit less degree of hydration than OPC (ordinary Portland cement) pastes. The most satisfactory characteristics of the strength were observed when the mixing ratio of the TFT-LCD waste glass was 10%.
The utilization of thin film transistor liquid crystal display waste glass as a pozzolanic material
This investigation elucidates the pozzolanic behavior of WGBC (waste glass blended cement) paste used in TFT-LCD (thin film transistor liquid crystal displays). XRD (X-ray diffraction) results demonstrate that the TFT-LCD waste glass was entirely non-crystalline. The leaching concentrations of the clay and TFT-LCD waste glass all met the current regulatory thresholds of the Taiwan EPA. The pozzolanic strength activity indices of TFT-LCD waste glass at 28 days and 56 days were 89% and 92%, respectively. Accordingly, this material can be regarded as a good pozzolanic material. The amount of TFT-LCD waste glass that is mixed into WGBC pastes affects the strength of the pastes. The strength of the paste clearly declined as the amount of TFT-LCD waste glass increased. XRD patterns indicated that the major difference was the presence of CSH (hydrates of calcium silicate, 2 theta = 32.1 ), aluminate and aluminosilicate, which was present in WGBC pastes. Portland cement may have increased the alkalinity of the solution and induced the decomposition of the glass phase network. WGBC pastes that contained 40% TFT-LCD waste glass have markedly lower gel/space ratios and exhibit less degree of hydration than OPC (ordinary Portland cement) pastes. The most satisfactory characteristics of the strength were observed when the mixing ratio of the TFT-LCD waste glass was 10%.
The utilization of thin film transistor liquid crystal display waste glass as a pozzolanic material
Lin, K.L. (author) / Huang, Wu-Jang (author) / Shie, J.L. (author) / Lee, T.C. (author) / Wang, K.S. (author) / Lee, C.H. (author)
Journal of Hazardous Materials ; 163 ; 916-921
2009
6 Seiten, 10 Bilder, 3 Tabellen, 12 Quellen
Article (Journal)
English
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