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原文传递 Evaluation of Silica Fume in Bridge Deck Concrete Overlays.

题名：	Evaluation of Silica Fume in Bridge Deck Concrete Overlays.
作者：	montney, r. a. wojakowski, j. b.
关键词：	silicon dioxide, kansas, curing methods, concrete durability, highway construction, cracking(fracturing), admixtures
摘要：	Chlorides that are used for ice control on the Kansas highways cause serious corrosion of the reinforcing steel in concrete bridges. The Kansas Department of Transportation (KDOT) has tried various methods to prevent chloride from penetrating the concrete on bridge decks. In 1990 two silica fume bridge deck overlays were placed on I-470 in Shawnee County along side of two control bridges. While the silica fume overlays have successfully inhibited the chloride penetration of the concrete, extensive cracking occurred in the silica fume overlays. Most of the cracking occurred in the first five years of the bridge deck life. KDOT has made significant changes in curing methods since 1990 to control the early cracking in the silica fume overlays. / NOTE: Final rept. 1990-2005. / Supplementary Notes: See also PB2006-108410. Sponsored by Kansas Dept. of Transportation, Topeka. Bureau of Materials and Research. / Availability Note: Also available on CD-ROM. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0801；14p
报告类型：	科技报告