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原文传递 IOWA THICKNESS DESIGN GUIDE FOR LOW VOLUME ROADS USING RECLAIMED HYDRATED CLASS C FLY ASH.

题名：	IOWA THICKNESS DESIGN GUIDE FOR LOW VOLUME ROADS USING RECLAIMED HYDRATED CLASS C FLY ASH.
作者：	Bergeson-KL; Barnes-AG; Brink-M (Editor)
关键词：	AASHTO-; ARTIFICIAL-AGGREGATES; BASE-COURSE-PAVEMENTS; FLY-ASH; HYDRATES-; IOWA-; LAYER-COEFFICIENT-PAVEMENTS; LOW-VOLUME-ROADS; PAVEMENT-DESIGN; RECLAIMED-FLY-ASH; THICKNESS-
摘要：	This paper is intended to provide flexible pavement thickness design parameters and a design method for low volume roads and streets utilizing Iowa reclaimed hydrated Class C fly ashes as artificial aggregates for base material. AASHTO design guidelines are presented for using these materials untreated, or if higher strengths are needed, stabilized with raw fly ash or hydrated lime. Hydrated Class C fly ashes in Iowa are produced at sluice pond disposal sites at generating stations burning western sub-bituminous coals. They may be formed by dozing raw ash into the sluice pond where it hydrates to form a cementitious mass or they may be constructed as an engineered fill (above the sluice pond level) by placing the raw ash in lifts, followed by watering, compaction and subsequent hydration. The hydrated ash is typically mined by using conventional recycling-reclaiming equipment to pulverize the material where it is stockpiled on-site for use as an artificial aggregate. Research has been conducted on these materials, on an on-going basis, under the Iowa fly Ash Affiliate Research Program since 1991. Test roads have been constructed using reclaimed fly ash as an aggregate base in Marshalltown (1994) and near Ottumwa (1995). They have been, and are, performing well. Based on extensive laboratory testing, this paper presents layer coefficients for reclaimed hydrated Class C fly ash bases for use in AASHTO thickness design for low volume roads and streets.
总页数：	Conference Title: Crossroads 2000. Location: Ames, Iowa. Sponsored by: Iowa State University and Iowa Department of Transportation. Held: 19980819-19980820. 1998. pp253-258 (5 Fig., 5 Tab., 11 Ref.)
报告类型：	科技报告