Weathering of roofing materials - An overview

被引：181

作者：

Berdahl, Paul ^{[1
]}

Akbari, Hashem ^{[1
]}

Levinson, Ronnen ^{[1
]}

Miller, William A. ^{[2
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2008年 / 22卷 / 04期

关键词：

weathering; roofing materials; photodegradation; soiling; solar reflectance;

D O I：

10.1016/j.conbuildmat.2006.10.015

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

An overview of several aspects of the weathering of roofing materials is presented. Degradation of materials initiated by ultraviolet radiation is discussed for plastics used in roofing, as well as wood and asphalt. Elevated temperatures accelerate many deleterious chemical reactions and hasten diffusion of material components. Effects of moisture include decay of wood, acceleration of corrosion of metals, staining of clay, and freeze-thaw damage. Soiling of roofing materials causes objectionable stains and reduces the solar reflectance of reflective materials. (Soiling of non-reflective materials can also increase solar reflectance.) Soiling can be attributed to biological growth (e.g., cyanobacteria, fungi, algae), deposits of organic and mineral particles, and to the accumulation of fly ash, hydrocarbons and soot from combustion. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：423 / 433

页数：11

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