Utilization of wet screening incineration fine bottom ash as raw materials in autoclaved aerated concrete production

• Main Authors: Chi-HouLo, 羅智豪
• Other Authors: Juu-En Chang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/s8b3gc

碩士 === 國立成功大學 === 環境工程學系 === 102 === Bottom ash-fine aggregate (BA-FA) and bottom ash-fine (BA-F) are products during Wet screening incineration bottom ash fine (BA-Fs), require more methods to reuse and improve the dealing problem. It has much more CaCO3 in BA-F and to be considered as the influence of concrete hydration and the rate of hydration and reveal by chemical analysis observing. BA-Fs is rich in calcium and silica elements, so that have the potential to be used in the production of autoclaved aerated concrete (AAC) as an alternative raw material. Use CaCO3 and BA-F replace the AAC ratio of calcium and silica to be the aggregate, and the reactivity as CaO. The concentration of CaCO3 of aggregate from 0% increase to 16wt. %, the compression strength changes from 11.5MPa to 6.70MPa, when CaCO3 replaced CaO, the compression strength became 7.50MPa. Increase the ratio of the replacement as BA-F to 50wt. %, BA-FA to 30wt. %, it can be in accordance with AAC standard, and in the dissolution tests are all in accordance with the hazardous industrial waste Criteria. It has the negative effects to the AAC productions which contain CaCO3, and to replace CaO can increase the ratio and the characteristic of the products.