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Self-Consolidating Concrete for Precast Structural Applications: Mixture Proportions, Workability, and Early-Age Hardened Properties.
| 题名： | Self-Consolidating Concrete for Precast Structural Applications: Mixture Proportions, Workability, and Early-Age Hardened Properties. |
| 作者： | koehler, e. p. fowler, d. w. |
| 关键词： | mixture proporations, workability, hardened properties, bridge beams, evaluation, recommendations |
| 摘要： | Self-consolidating concrete (SCC) is an advanced type of concrete that can flow under its own mass without vibration, pass through intricate geometrical configurations, and resist segregation. The use of SCC in precast structural applications can result in increased construction productivity, improved jobsite safety, and improved concrete quality. Certain changes in mixture proportions, which are necessary to achieve SCC workability, may affect hardened properties. A joint research project (TxDOT Project 0-5134: Self-Consolidating Concrete for Precast Structural Applications) was conducted at the Center for Transportation Research (CTR) and the Texas Transportation Institute (TTI) to evaluate the suitability of SCC for prestressed concrete bridge beams. The CTR researchers related SCC workability to materials and mixtures proportions, developed a series of SCC mixtures expected to be representative of SCC produced in Texas for prestressed concrete bridge beams, evaluated the early-age engineering properties (up to 24 hours) and shrinkage of these mixtures, and developed recommendations for specifying and inspecting SCC. The TTI researchers evaluated the longer-term engineering properties of these mixtures and tested full-scale beams. This report describes the research conducted by the CTR researchers. / Supplementary Notes: Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas 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： | u0816；372p |
| 报告类型： | 科技报告 |
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