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Evaluation Of Asphalt Stripping Resistance For Different Types Of Aggregates And Additives

Submitted2019-08-27
Last Update2019-08-27
TitleEvaluation Of Asphalt Stripping Resistance For Different Types Of Aggregates And Additives
Author(s)Author #1
Author title:
Name: Taisir Khedaywi
Org: Civil Engineering Department, Faculty of Engineering, Jordan University of Science and Technology, Irbid, Jordan.
Country:
Email: Khedaywi@just.edu.jo

Author #2
Author title:
Name: Nabil Al Kofahi
Org: Civil Engineering Department, Faculty of Engineering, Jadara University, Irbid, Jordan
Country:
Email: Alkofahi@jadara.edu.jo

Other Author(s)
Contact AuthorAuthor #2
Alt Email: alkofahi@jadara.edu.jo
Telephone:
KeywordsAsphalt, Stripping, Additives, Boiling test, Rolling bottle test, Visual assessment
AbstractStripping is the separation of the asphalt binder film from the aggregate surface due to the action of water. It results from many factors, but moisture or vapor moisture is considered the major reason. Many methods are used to predict stripping and effectiveness of anti-stripping agents. This study was a part of a comprehensive study, which was conducted to solve asphalt road deteriorations in Jordan and conserve natural resources and budgets of road construction and maintenance. To achieve this objective, three types of aggregate (the most used in Jordan) were used: crushed limestone, uncrushed valley gravel and crushed basalt. Asphalt binder of (60/70) penetration and two anti-stripping additives: hydrated lime and a liquid additive (polyamine) were used as well. ASTM (D 3625), Texas boiling test, modified Texas boiling test by stirring and rolling bottle test were run on loose mixtures. Test results have shown that limestone is superior to valley gravel and basalt aggregates. Moreover, lime additive (1.5-2% by weight of aggregate) is better than polyamine (0.75-1% by weight of AC). It was also revealed that aggregate type was the most significant variable affecting stripping. Anti-stripping agents are recommended to be used by the Ministry of Public Works and Housing where stripping potential is high.
Paperview paper 4773.pdf (425KB)

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