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原文传递 EVALUATION OF MIX TIME ON CONCRETE CONSISTENCY AND CONSOLIDATION.

题名：	EVALUATION OF MIX TIME ON CONCRETE CONSISTENCY AND CONSOLIDATION.
作者：	Cable-JK; Brink-M (Editor)
关键词：	CONCRETE-; CONCRETE-PAVEMENTS; CONSISTENCY-; CONSOLIDATION-; MIX-DESIGN; MIXERS-; MIXING-; TIME-
摘要：	In an effort to look at ways to improve the quality of the finished concrete pavement product, the Iowa Department of Transportation and Iowa State University conducted research on two existing highway projects in 1997. The objectives of that research included evaluation of two alternative types of central mixers, the effect of the type of hauling equipment, the mix design, and the mixing time employed to product the mix on the consistency, consolidation and air matrix in the concrete pavement. The concrete was tested at the plant site and at the grade by standard methods employed in the testing of ready mixed concrete delivery. The results of that research have provided some insight into the consistency and consolidation of the concrete produced and placed. In addition, core analysis of the hardened concrete by the Scanning Electron Microscope (SEM) have given more information relative to the impact of the paving operation on the air matrix on the finished product. This paper will report some of those results and indicate how they may be shaping the future mix design and construction of concrete pavements.
总页数：	Conference Title: Crossroads 2000. Location: Ames, Iowa. Sponsored by: Iowa State University and Iowa Department of Transportation. Held: 19980819-19980820. 1998. pp76-77 (1 Ref.)
报告类型：	科技报告