详情

原文传递 PERFORMANCE OF EPOXY-COATED REBARS IN BRIDGE DECKS.

题名：	PERFORMANCE OF EPOXY-COATED REBARS IN BRIDGE DECKS.
作者：	Smith-JL; Virmani-YP
关键词：	REINFORCED-CONCRETE-BRIDGES; BRIDGE-DECKS; DETERIORATION-; REINFORCING-BARS; CORROSION-; EPOXY-COATINGS; EVALUATION-; RESEARCH-; FEDERAL-HIGHWAY-ADMINISTRATION; STATE-HIGHWAY-DEPARTMENTS; FIELD-TESTS; LABORATORY-TESTS
摘要：	Deterioration of reinforced concrete structures is a serious and costly problem for highway agencies and is linked primarily to the corrosion of steel reinforcing bars due to chlorides. The two main sources of chlorides are deicing chemicals and seawater. To prevent chloride-induced corrosion of steel reinforcing bars, epoxy-coated reinforcing steel (ECR) was introduced. The Federal Highway Administration (FHWA), in response to reports of poor performance of ECR, recommended that states evaluate the performance of ECR in existing bridge decks. Several states initiated studies and prepared reports documenting their findings. The FHWA report "Performance of Epoxy Coated Rebars in Bridge Decks" (FHWA-RD-96-092) summarizes the results of those studies. This article is a synopsis of that report and is based on field evaluations of the structures and the laboratory evaluation of concrete cores taken from the various structures. A brief summary of the overall condition of the structures, average concrete cover, average chloride content, and the condition of ECR segment extracted from the cores are included in the article. Generally, the overall condition of bridge decks was good. Even though deck cracking was prevalent, it did not appear to be corrosion-related. The use of an adequate, good quality, concrete cover; adequate inspection; finishing and curing of the concrete; and the proper manufacturing and handling of ECR complement the use of ECR in providing effective corrosion protection for concrete bridge decks.
总页数：	Public Roads. 1996. Fall 60(2) pp6-12 (2 Phot., 1 Tab., 18 Ref.)
报告类型：	科技报告