Production of functional building materials using wet-sieving sludge from MSWI bottom ash.

• Main Authors: Shin-YuenPeng, 彭信源
• Other Authors: Juu-En Chang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/bu3x36

碩士 === 國立成功大學 === 環境工程學系 === 102 === This study investigates on development of functional building materials. Furthermore, it was intended to utilize wet-sieving sludge from municipal solid waste incineration bottom ash (BAS) in production of functional building materials. Several parameters must be determined including fiber content, calcium to silica ratio (Ca/Si), water to solid ratio (W/S), press time and autoclave curing condition. The products have the highest flexural strength about 10.10 N/mm2 when fiber content, W/S ratio and press time are 8 wt.%, 1.45 L/kg and 3 min. Besides, the products with Ca/Si ratio around 0.83 under 12-atm saturated steam pressure for 15 h would have better formation of tobermoirte (Ca5(OH)2Si6O16•4H2O). In addition, this study investigates unique chemical analysis to define reactive CaO and SiO2 of BAS. Besides, the results reveal that products have better flexural strength and formation of tobermorite comparing to others which using parameters of total SiO2 and CaO in BAS. The products with 15 wt.% BAS have no significant change at 550℃ for 30 min. They exceed the fire-resistance limitation of reinforced concrete. In terms of leaching test, leaching of heavy metals from products meet TCLP and green building material limit under the condition at acetic acid. Furthermore, from tank leaching test, leaching of heavy metals of building material decree (BMD) is not detected.