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frank
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In the past decades, fly ash has been studied as a potential raw material for use in ceramic products, valuable element extraction, in environmental engineering, and in Portland cement. However, the utilization of fly ash is still far below the amount produced. The difficulty in manufacturing products with fly ash to meet market specifications contributes to the reluctance to utilizing fly ash. Also the extra costs associated with retrofitting conventional factories discourage small manufacturers from converting current operations (Fatiah et al 2005). For fly ash bricks to be a viable solution, several conditions must be met. The product must meet or exceed current regulations for conventional building bricks. Also, the production of fly ash bricks cannot be prohibitively expensive. Finally, fly ash brick must meet current health standards for building materials. |
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发表于 2008-3-18 14:00:19
[ 本帖最后由 晴天冰羽 于 2008-3-31 12:21 编辑 ]
,我也来报到,请多指教