Evaluation of Anti-stripping Additives for Asphaltic Concrete Mixes Effectiveness and Recommended Usage PDF Download
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Author: Fred Field
Publisher:
ISBN:
Category : Pavements, Asphalt concrete
Languages : en
Pages : 18
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Book Description
Author: Fred Field
Publisher:
ISBN:
Category : Pavements, Asphalt concrete
Languages : en
Pages : 18
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Book Description
Author: David G. Tunnicliff
Publisher: Transportation Research Board
ISBN: 9780309053747
Category : Technology & Engineering
Languages : en
Pages : 68
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Book Description
Author: Bradley J. Putnam
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 178
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Book Description
The use of hydrated lime or other liquid anti stripping agents (ASA) is the most common method to improve the moisture susceptibility of asphalt mixes. However, most laboratory test conditions used to evaluate the moisture susceptibility of the mixes are only for a short duration of time. This might not be a good representation of the field conditions (i.e., several months or years of service). Thus, a study to evaluate the effects of conditioning the mixes for longer durations was initiated. Also, another problem with the use of the liquid anti stripping agents is their heat storage stability. This report addresses these two issues, by preparing and testing mixtures made with fresh binder for indirect tensile strength after conditioning the samples for 1, 7, 28, 90 and 180 days, and samples prepared from binder stored for three days at 160° C after conditioning them for 1, 28 and 90 days. The results of this study indicated that hydrated lime and the liquid anti stripping agents were equally effective for the mixes used in this research when conditioned beyond one day. In the case of samples prepared from stored binder, there was no significant difference in the effectiveness of hydrated lime and the liquid anti stripping agents even after conditioning for one day. Though it was observed that none of the ASA treatments performed better than others in the case of samples prepared with stored binder, it was also observed that almost all mixes gave significantly similar wet ITS and TSR values as samples prepared from fresh binder.
Author:
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 60
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Book Description
Author: David G. Tunnicliff
Publisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 60
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Book Description
Author:
Publisher:
ISBN:
Category : Bituminous materials
Languages : en
Pages : 94
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Book Description
Author: Christine W. Curtis
Publisher:
ISBN:
Category : Aggregates (Materials)
Languages : en
Pages : 30
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Book Description
The purpose of this literature review is to search the literature in the area of chemical and mineral agents used to promote adhesion of asphalt-aggregate mixes. In addition, tests performed to measure the effectiveness of these agents were reviewed. The information gained through this literature search and review provides background information for the research being performed in the SHRP A-003B contract. This literature search was performed using on-line chemical abstracts for documents in the time period of 1967 to present.
Author: Zein A. Eid
Publisher:
ISBN:
Category : Pavements, Asphalt concrete
Languages : en
Pages : 392
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Book Description
Author: Philip J. Arena
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
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Book Description
Author: Frazier Parker
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 62
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Book Description
The freeze thaw stress pedestal test, the boil test and the indirect tensile test were evaluated for assessing the stripping potential of typical Alabama asphalt concrete mixes and the effectiveness of antistripping additives. This was accomplished by testing surface and base/ binder mixes with five aggregate combinations, two sources of asphalt cement and three antistripping additives. Because of the test complexity and lack of a strong correlation with stripping performance, the freeze thaw stress pedestal test is not recommended. The boil and indirect tensile tests, in combination, offer a viable, although, imperfect, system for stripping evaluation. The lack of a strong correlation with reported field performance detracts from both tests. However, the imprecise and subjective nature of the reported performance and the correlations obtained by others are mitigating factors.
