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- W603614533 abstract "THE TECHNICAL MATERIAL CONSISTS OF AN ABBREVIATED DISCUSSION OF CERTAIN TECHNIQUES IN SOLVENT EXTRACTION AND ADSORPTION SEPARATION PROCEDURES FOR ASPHALT. IT IS SHOWN THAT SHARP FRACTIONATION IS OBTAINED BY SELECTIVE ADSORPTION OF METHYL CYCLOHEXANE SOLUTIONS ON SILICA GEL. THESE SEPARATIONS PRODUCE FRACTIONS SIMILAR TO THOSE FROM SOLVENT FRACTIONATION BASED ON ULTRAVIOLET ABSORPTION MEASUREMENTS. ADDITIONAL INFORMATION IS ALSO INDICATED BY INFRARED ABSORPTION STUDIES BUT THE IMPLICATIONS AT THESE LATTER ENERGY LEVELS ARE NOT CLEAR AT THIS TIME. THIS INFORMATION PROVIDES A BASIS FOR EVALUATING THE DIFFERENCES IN CHEMICAL COMPOSITION OF ASPHALTS WHICH CAN BE VALUABLE IN CLASSIFYING BITUMINOUS MATERIALS INTO SEPARATE CATEGORIES. BASED ON A GROSS CLASSIFICATION INTO NAPHTENIC, INTERMEDIATE OR AROMATIC TYPE ASPHALTS, THE RANGE OF PHYSICAL PROPERTIES PREDICTED FOR EACH TYPE AS A FUNCTION OF PROCESSING ARE DISCUSSED. THE PHYSICAL PROPERTIES CONSIDERED ARE PENETRATION, SOFTENING POINT, DUCTILITY AND CONSISTENCY IN ABSOLUTE UNITS. GENERALIZED CHARTS RELATING CONSISTENCY AND COMPLEX FLOW AND THE COMMON PHYSICAL TESTS USED BY ASPHALT TECHNOLOGISTS ARE PRESENTED. COMMENTS ARE MADE CONCERNING THE DURABILITY OF ASPHALTS AS A FUNCTION OF THEIR COMPOSITION. /AUTHOR/" @default.
- W603614533 created "2016-06-24" @default.
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- W603614533 date "1958-01-01" @default.
- W603614533 modified "2023-09-23" @default.
- W603614533 title "ASPHALT COMPOSITION AND PROPERTIES" @default.
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