Light sources used in laboratory weathering of sealants and their effect on the correlation with natural weathering

Title: Light sources used in laboratory weathering of sealants and their effect on the correlation with natural weathering
Author(s): P. Brennan, E.T. Everett
Paper category : book
Book title: Durability of Building Sealants - State-of-the-Art Report of RILEM TC 139-DBS
Editor(s): A. T. Wolf
Print-ISBN: 2-912143-12-8
e-ISBN: 2351580419
Publisher: RILEM Publications SARL
Publication year: 1999
Pages: 155 - 172
Total Pages: 18
Nb references: 15
Language: English

Abstract: 
Various light sources used in accelerated weathering devices are compared with sunlight in their performance of reproducing the ultraviolet wavelength range. Background information is given on the incident solar radiation spectrum. The relationship between shorter wavelengths and material durability is explored and the results of a correlation study of accelerated and natural weathering of sealants are presented relative to (a) accelerated tests compared to 'Florida weathering', (b) fluorescent ultraviolet weathering compared to xenon arc weathering, (c) UVB-313 lamp compared to the UVA-340 lamp, and (d) duration of accelerated exposures for test methods and specifications. The authors show that accelerated laboratory testing can provide reliable indications of how materials perform under specific sets of conditions.

Online publication: 2009-12-07
Publication type : full_text
Public price (Euros): 0.00