ASTM-D529 2004(Redline)

It is not possible to establish a precise correlation between accelerated and natural weathering because of geographical climatic variations, local weather variation from normal, and local pollutants. This weathering apparatus and procedure are used for comparing the weathering characteristics of bituminous materials against a reference material for which the outdoor weathering characteristics are known. Guide G 141 provides guidance regarding this issue.

1. Scope

1.1 This practice describes test conditions and procedures for enclosed carbon-arc exposures conducted according to Practices G 151 and G 153 for bituminous roofing and waterproofing materials that have a minimum softening point of approximately 95°C (200°F) as determined by Test Method D 36. (See also Terminology G 113.)

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus) D1669 Practice for Preparation of Test Panels for Accelerated and Outdoor Weathering of Bituminous Coatings D1670 Test Method for Failure End Point in Accelerated and Outdoor Weathering of Bituminous Materials G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials G141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests G151 Practice for Exposing Nonmetallic Materials in Accelerated