Sintering and Vesicant Study of Lightweight Aggregate Formation of Reservoir Sediments with Various Additives

• Main Authors: Chou, Tsan-Yu, 周贊祐
• Other Authors: 魏玉麟
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/40717953009925717688

碩士 === 東海大學 === 環境科學系 === 93 === Reservoir sediment is a kind of specimen rich in silica. It is well recognized that bloating compounds evolving gas after sintering are suitable additives for manufacturing lightweight aggregate. Bottom sediment, which is mostly expansibility shale and clay, from reservoirs in Taiwan has the potential of sintering lightweight aggregate not only because its ingredients fit the sintering of lightweight aggregate and vesicant mechanism but also because its particle size range can bypass the steps of previous administrating processes. There is a serious problem of bottom sediment from reservoirs in Taiwan. Among the 46 reservoirs being measured in this study, in average, the amount of deposits reaches 14,600,000 m3, which can be a rich resource of lightweight aggregate. The basic materials of the present study were sediment from reservoirs. Various bloating additives such as SiO2, Al2O3, carbonate of alkali metal, and the waste were mixed with the sediment and heated under different temperatures. Various instruments were used to examine its vesicant mechanism. Experimental parameters of this study include the kind and amount of bloating additives and sintering temperature, etc. Basic analyses include the distribution of particle size range, the element analysis of sediment and its additives, and the analysis of heat and weight. The instruments used in the present study were SEM and XRD. The results show that sediments from reservoirs have a high potential to sinter lightweight aggregate. Among the six examined reservoirs, Shihmen reservoir and Wushantou reservoir were found to hold the highest economical benefits on account of its direct pellet and sintering into lightweight aggregate. In addition, the sintering temperature can be effectively decreased. With the help of suitable vesicant additive, the signalized vesicant helps the sintering of lightweight aggregate. Additionally, compounds of gas were effective flux because of its acceleration of eutectic state. By adding adequate amount of them can not only lower the sintering temperature of lightweight aggregate but also diminish the amount of waste.