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Design and Evaluation of High-Volume Fly Ash Concrete Mixes

项目名称：	Design and Evaluation of High-Volume Fly Ash Concrete Mixes
摘要：	Traditional concrete specifications limit the amount of fly ash to 35 or 40 percent cement replacement. Recent studies, including those by the investigators, have shown that higher cement replacement percentages - even up to 75 percent - can result in excellent concrete in terms of both strength and durability. Referred to as high-volume fly ash (HVFA) concrete, this material offers a viable alternative to traditional portland cement concrete and is significantly more sustainable. However, HVFA concrete is not without its problems. At all replacement rates, fly ash generally slows down the setting time and hardening rates of concrete at early ages, especially under cold weather conditions, and when less reactive fly ashes are used. Furthermore, with industrial by-products, some variability in physical and chemical characteristics will normally occur, not only between power plants but also within the same plant. Consequently, to achieve the benefits of HVFA concrete, guidelines are needed for its proper application in bridges, roadways, culverts, retaining walls, and other transportation-related infrastructure components.
状态：	Completed
资金：	150000.00
资助组织：	Missouri Department of Transportation
开始时间：	20101206
实际结束时间：	20120930
主题领域：	Design；Highways；Research；I15: Environment；I30: Materials