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RESISTANCE OF CONCRETE TO FREEZING AND THAWING.
| 题名： | RESISTANCE OF CONCRETE TO FREEZING AND THAWING. |
| 作者： | Janssen-DJ; Snyder-MB |
| 关键词： | AGGREGATES-; D-CRACKING; DURABILITY-; FREEZING-THAWING-EFFECTS; MODAL-ANALYSIS; PORTLAND-CEMENT-CONCRETE; QUALITY-; RESONANCE-FREQUENCY; STRATEGIC-HIGHWAY-RESEARCH-PROGRAM |
| 摘要： | This study, aimed at improving the freeze-thaw resistance of concrete, consists of three parts. Part I evaluates parameters affecting the freeze-thaw durability of concrete. A modification of the existing standard of method for determining the durability factor of concrete specimens is proposed, and a new procedure for fundamental transverse frequency (used in durability factor calculations) has been developed. Part II focuses on developing better methods for identifying nondurable aggregates, and has resulted in a rapid new test based on the hydraulic fracture of aggregates. Part III describes field experiments to evaluate the freeze-thaw resistance of a number of specified concrete mixes and the use of sealants to mitigate D-cracking. Preliminary field performance results are presented. |
| 总页数： | 1994/06. pp201 (20 Fig., 40 Tab., 7 Ref., 9 App.) |
| 报告类型： | 科技报告 |
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