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Predictive Service Life Tests for Roofing Membranes: Phase II investigation of Accelerated Aging Tests for Tracking Degradation of Roofing Membrane Materials; Final rept
| 题名： | Predictive Service Life Tests for Roofing Membranes: Phase II investigation of Accelerated Aging Tests for Tracking Degradation of Roofing Membrane Materials; Final rept |
| 作者： | Bailey, D. M.; Cash, C. G.; Davies, A. G. |
| 关键词： | Aging(Materials); Life expectancy(Service life); Degradation; Military facilities; Government procurement; Exposure(General); Field tests; Long range(Time); High strength; Accelerated testing; Roofs |
| 摘要： | The average service life of roofing membranes used in low-slope applications on U.S. Army buildings is estimated to be considerably shorter than the industry-presumed 20-year design life, even when installers carefully adhere to the latest guide specifications. This problem is due in large part to market- driven product development cycles, which do not include time for long-term field testing. To reduce delivery costs, contractors may provide untested, interior membranes in place of ones proven satisfactory in long-term service. Federal procurement regulations require that roofing systems and components be selected according to desired properties and generic type, not brand name. The problem is that a material certified to have satisfactory properties at installation time will not necessarily retain those properties in service. The overall objective of this research is to develop a testing program that can be executed in a matter of weeks to adequately predict a membrane's long-term performance in service. This report details accelerated aging tests of 12 popular membrane materials in the laboratory, and describes outdoor experiment stations set up for long-term exposure tests of those same membranes. The laboratory results will later be correlated with the outdoor test results to develop performance models and predictive service life tests. |
| 总页数： | 55p |
| 报告类型： | 科技报告 |
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