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Service Life and Cost Comparisons for Four Types of CDOT Bridge Decks.
| 题名： | Service Life and Cost Comparisons for Four Types of CDOT Bridge Decks. |
| 作者： | hearn, g. xi, y. |
| 关键词： | life cycle costs, annualized costs, concretes, bridge surfaces, coatings, epoxy coatings, reinforcing steels, durability, waterproofing, membranes, corrosion prevention, performance evaluation |
| 摘要： | This study examines costs and performance of four types of reinforced concrete bridge decks currently in service on Colorado DOT (CDOT) highway bridges. These four types allow a comparison between bare decks and decks with waterproofing membranes, and between decks with uncoated steel reinforcement and decks with epoxy-coated steel reinforcement. Histories of deck condition ratings are used to estimate deck service life and to generate population models of service life. Decks with waterproofing membrane have longer service life than bare decks. Condition data indicate longer service life for decks with uncoated reinforcing steel, but this outcome may be due to the limited extent of condition data for decks having epoxy-coated reinforcement. Costs for bridge decks are evaluated as initial costs, present values, and annualized costs. By all present value and annualized cost measures, decks with waterproofing membrane are least expensive. This outcome is not sensitive to the value of the discount factor. / NOTE: Final rept. / Supplementary Notes: Sponsored by Colorado Dept. of Transportation, Denver. Research Branch. and Federal Highway Administration, Denver, CO. Colorado Div. / Availability Note: 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： | u0803；118p |
| 报告类型： | 科技报告 |
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