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PERFORMANCE OF EPOXY-COATED PRESTRESSING STRANDS AT ELEVATED TEMPERATURES.
| 题名： | PERFORMANCE OF EPOXY-COATED PRESTRESSING STRANDS AT ELEVATED TEMPERATURES. |
| 作者： | Washer-GA |
| 关键词： | STEEL-WIRE; EPOXY-COATINGS; PRESTRESSING-STRANDS; PERFORMANCE-; HIGH-TEMPERATURE; SOFTENING-; BONDING-; EXPERIMENTS-; FEDERAL-HIGHWAY-ADMINISTRATION |
| 摘要： | The Federal Highway Administration recently completed experiments to assess the performance of epoxy-coated prestressing strands at elevated temperatures. The purpose of the experiments was to determine the temperature at which epoxy softening causes slip, the effect of that slip on the stress in the strands and the transfer length, and the effect of cyclic temperature variations. This article describes the study specimens, the test apparatus and instrumentation, and test procedures. Results indicate that temperatures in the vicinity of 66 deg C will undermine the strand's bonding ability. Further, temperatures as low as 63 deg C may soften the epoxy coating on a strand and reduce its ability to bond with the surrounding concrete. |
| 总页数： | Public Roads. 1995. Summer 59(1) pp6-7 (1 Phot., 7 Ref.) |
| 报告类型： | 科技报告 |
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