This report presents a study of the influence of different additives on three important qualities of asphalt cement: consistency, durability and resistance to water action. The consistency is analyzed by kinematic viscosity tests at 275 F, (135 C) penetration tests at 77 F (25 C) and ductility tests at 77 F (25 C). The durability is studied using the AASHO Thin Film Oven test, and the resistance to water action is studied using immersion compression tests, wet abrasion tests and two other kinds of stripping test. A 85-100 grade paving asphalt was used for the study. Two rubber latex and four antistripping agents were added at different percentages to this asphalt cement. A general discussion on additives is firstly presented. Then, A brief description of the test is given (specially on the modification brought to the standard tests). Finally, the results are discussed. These results show that a low content of the latex additive in asphalt cement decreases its consistency while a high content increases it. The antistripping additives decrease the consistency of asphalt cement. The resistance to water action as measured by the compression test is slightly increased by the antistripping additives. But the wet abrasion test shows that all the a additives decrease the resistance of the asphalt cement to water action. The other types of stripping test give no valuable conclusion for asphalt cement, but they are very useful for cutback and road oils. The correlation between road performance and the wet abrasion test has not been established for hot mixes. but a good correlation had been already established by Kari and Coyne for slurry seal. No significant mathematical or graphical relation was established between the results of the Immersion Compression Tests and the Wet Abrasion Tests. /AUTHOR/

  • Authors:
  • Publication Date: 1972


  • French

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  • Accession Number: 00096456
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM