详情

原文传递 PERFORMANCE OF FIRST STRUCTURE BUILT WITH HIGH-PERFORMANCE CONCRETE IN VIRGINIA.

题名：	PERFORMANCE OF FIRST STRUCTURE BUILT WITH HIGH-PERFORMANCE CONCRETE IN VIRGINIA.
作者：	Ozyildirim-C
关键词：	Beams-; Bridge-decks; Bridge-substructures; Compressive-strength; Concrete-bridges; Cost-effectiveness; Cracking-; High-performance-concrete; Monitoring-; Performance-; Permeability-; Prestressed-concrete; Silica-fume; Slag-; Steam-curing; Virginia-
摘要：	The preparation and placement operations, concrete properties, cost-effectiveness, and 5-year performance were evaluated for the first bridge containing high-performance concrete built by the Virginia Department of Transportation. High-performance concrete was used in the prestressed beams and cast-in-place substructure and deck concrete. The concrete in the beams contained silica fume, and the concrete in the cast-in-place substructure and deck contained slag. A high compressive strength was specified for the prestressed beams, normal strengths were specified for the cast-in-place substructure and deck concretes, and low permeability was specified for all concretes. Steam-cured specimens for the beams had high early strengths, but moist-cured specimens developed high long-term strengths. The permeability was much lower than specified. Concretes were easily placed, and the strengths were higher than specified. The structure was monitored during construction and surveyed after construction and at 5 years. Some cracking occurred in the deck, but the cracks were tight. High-strength concrete is recommended for use in beams if economically feasible. Temperature-matched curing should be used to determine the strength of elements where high temperature increases are expected, and pozzolans or slag should be used to reduce permeability.
总页数：	Transportation Research Record. 2002. (1798) pp43-50 (3 Fig., 10 Tab., 12 Ref.)
报告类型：	科技报告