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Laboratory evaluation of moisture performance of weather resistive barriers.

机译:耐候性屏障的湿气性能的实验室评估。

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摘要

The objective of this thesis aimed (1) to evaluate the effectiveness of the existing test methods used in characterizing moisture performance of weather resistive barrier (WRB) products, and (2) to provide a benchmark for assessment of different boundary conditions. The test materials were placed between a layer of water and various types of hygroscopic sinks including vacuum cast gypsum, oriented strand board (OSB), thick adsorbing paper (blotter) and a desiccant (anhydrous calcium chloride). The WRB were either placed directly in contact with the hygroscopic sink or were separated from it by an air gap. These tests indicated that moisture transport was highly dependent on the conditions introduced on the upper and the lower surfaces of the WRB.; This thesis reports the results of a series of experimental studies, which examined moisture transport to characterize WRB for input into material standards. The new test methods developed in the thesis include: modified inverted cup (MIC) test for measuring the maximum possible total moisture transmission, moisture flux (MF) test for measuring moisture flow to an OSB or plywood substrate, and liquid penetration resistance (LPR ) test for measuring onset and the rate of the liquid phase transport.; The test methods were used to examine moisture transport through new WRB. The test were also used to evaluate effect of penetrations, outdoor weathering, and contribution of detergent dissolved in the interstitial water. Subsequent to the material testing, an assembly testing provided a comparative evaluation of such effects as penetrations or additives in a stucco layer. Proposed in this thesis are new laboratory test methods and the acceptance criteria to be incorporated in the next edition of North American material standards. (Abstract shortened by UMI.)
机译:本文的目的旨在(1)评估用于表征耐候性屏障(WRB)产品的水分性能的现有测试方法的有效性,以及(2)为评估不同边界条件提供基准。将测试材料置于水层和各种吸湿性水槽之间,包括真空浇铸石膏,定向刨花板(OSB),厚吸附纸(吸墨纸)和干燥剂(无水氯化钙)。 WRB要么直接与吸湿水槽接触,要么通过气隙与其隔开。这些测试表明水分的输送高度依赖于WRB上表面和下表面所引入的条件。本论文报告了一系列实验研究的结果,该实验研究了水分传输以表征WRB的特征,以输入材料标准。本文开发的新测试方法包括:用于测量最大可能总水分传输的改良倒杯 MIC )测试,水分通量(使用 MF 测试来测量流向OSB或胶合板基材的水分,使用耐液体渗透性 LPR )测试来测量起效和速率。液相传输。测试方法用于检查水分通过新的WRB的传输。该测试还用于评估渗透,室外风化以及溶解在间隙水中的洗涤剂的影响。在材料测试之后,组装测试提供了对灰泥层中渗透或添加剂等效果的比较评估。本文提出了新的实验室测试方法和将在下一版北美材料标准中纳入的验收标准。 (摘要由UMI缩短。)

著录项

  • 作者

    Pazera, Marcin.;

  • 作者单位

    Concordia University (Canada).;

  • 授予单位 Concordia University (Canada).;
  • 学科 Engineering Materials Science.; Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2003
  • 页码 198 p.
  • 总页数 198
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;建筑科学;
  • 关键词

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