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Asphalt Cements

Asphalt Cements. Background History of Specifications. Asphalt Soluble in petroleum products Generally a by-product of petroleum distillation process Can be naturally occurring. Tar Resistant to petroleum products Generally by-product of coke (from coal) production. Background.

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HISTORY OF ASPHALT GRADING SYSTEMS

HISTORY OF ASPHALT GRADING SYSTEMS. Grading By Chewing. Chewing - first mode of testing to determine asphalt hardness Initially used for natural asphalts such as Trinidad Lake asphalt Trinidad asphalt contains colloidal clay of volcanic origin

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Represents asphalt - PowerPoint PPT Presentation

Asphalt Cements

HISTORY OF ASPHALT GRADING SYSTEMS