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Significance and Use
4.1 Asphalt and pitch do not go through a solid-liquid phase change when heated, and therefore do not have true melting points. As the temperature is raised, they gradually soften or become less viscous. For this reason, the determination of the softening point must be made by an arbitrary, but closely defined, method if the test values are to be reproducible.
1.1 This test method covers the determination of the softening point of asphalt and pitch in the range from 50 to 180°C by the cup-and-ball apparatus, and gives results comparable to those obtained by Test Method D36.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A314 Specification for Stainless Steel Billets and Bars for Forging
D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)
D140 Practice for Sampling Bituminous Materials
D4296 Practice for Sampling Pitch
ICS Number Code 91.100.50 (Binders. Sealing materials); 93.080.20 (Road construction materials)
UNSPSC Code 30121601(Asphalt); 30121602(Pitch)
ASTM D3461-97(2012), Standard Test Method for Softening Point of Asphalt and Pitch (Mettler Cup-and-Ball Method), ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top