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Standard Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Fluorescent UV, Water Spray, and Condensation Method)
Přeložit název
NORMA vydána dne 1.2.2023
Označení normy: ASTM D4799/D4799M-17(2023)
Datum vydání normy: 1.2.2023
Kód zboží: NS-1103200
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Vosky. Živice. Ostatní ropné produkty
Pojiva. Těsnicí materiály
Materiály pro stavbu silnic
Keywords:
accelerated weathering, bituminous materials, degradation, exposure, fluorescent UV and condensation, light exposure, roofing, ultraviolet, waterproofing ,, ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products),91.100.50 (Binders. Sealing materials),93.080.20 (Road construction materials)
Significance and Use | ||||||||||||||||
4.1?This weathering apparatus is used for comparing the weathering characteristics of bituminous materials against a control material for which the outdoor weathering characteristics are known. It is not possible to establish a precise correlation between accelerated and natural weathering because (1) there are geographical climatic variations, local weather variations, and variations in local pollutants, and (2) the relation between accelerated and natural weathering is material dependent. Acceleration factors differ between materials as well as between formulations of the same material. Guide G141 provides guidance regarding this issue. Note 1:?This practice can be used for other than bituminous
materials, but the significance and use have not been
evaluated.
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1. Scope | ||||||||||||||||
1.1?This practice describes test conditions and procedures for fluorescent UV and condensation exposures conducted according to Practices G151 and G154 for bituminous roofing and waterproofing materials. (See Terminology G113.) 1.2?The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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2. Referenced Documents | ||||||||||||||||
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