Evaluation of Stripping and Moisture Damage in Asphalt Pavements Treated with Lime and Antistripping Agents PDF Download
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Author: W. Virgil Ping
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 646
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Book Description
This report summarizes the results of determining the moisture susceptibility by the primary test methods: (a) Original Lottman Method. (b) Modified Lottman Method (Tex-531-C); (c) Tunniclif f-Root Method; and (d) Boiling Test (Tex-530-C). Comparisons were made between the laboratory mixtures, plant mixtures, and cores obtained from the field test sections to determine the effectiveness of the various antistripping additives and to evaluate the various methods for measuring that effectiveness.
Author: W. Virgil Ping
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 646
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Book Description
This report summarizes the results of determining the moisture susceptibility by the primary test methods: (a) Original Lottman Method. (b) Modified Lottman Method (Tex-531-C); (c) Tunniclif f-Root Method; and (d) Boiling Test (Tex-530-C). Comparisons were made between the laboratory mixtures, plant mixtures, and cores obtained from the field test sections to determine the effectiveness of the various antistripping additives and to evaluate the various methods for measuring that effectiveness.
Author: Wei-Chou Virgil Ping
Publisher:
ISBN:
Category : Pavements, Asphalt concrete
Languages : en
Pages : 1248
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Book Description
Author: Mansour Solaimanian
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 66
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Book Description
This report summarizes the results of a long-term field evaluation of the effectiveness of lime and various antistripping agents. This research study was a continuation of the research carried out between 1986 and 1991 (documented in CTR Research Reports 441-1 and 441-2F). Core samples were obtained from the field test sections and tested in the laboratory based on Test Methods Tex-531-C and AASHTO T283. Test results did not indicate any consistent pattern with regard to effectiveness of certain antistripping additives versus others. The field test sections, treated with antistripping agents and built in eight districts of the Texas Department of Transportation, were monitored for signs of distress during the course of the research study.
Author: Ming-Jen Liu
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 246
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Book Description
This report summarized the results of field evaluation of the effectiveness of lime and various antistripping additives using the following methods: (a) Modified Lottman Method (Tex-531-C) and (b) Boiling Test (Tex-530-C). Core samples were obtained from the field test sections up to 48 months after construction. Field data to date show very little evidence of distress which is directly related to moisture damage or stripping. This was anticipated due to the slow rate of moisture ingress under adequate construction compaction.
Author: Byron E. Ruth
Publisher: ASTM International
ISBN: 9780803104600
Category : Technology & Engineering
Languages : en
Pages : 159
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Book Description
Author: Russell G. Hicks
Publisher: Transportation Research Board
ISBN: 9780309049245
Category : Technology & Engineering
Languages : en
Pages : 104
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Book Description
This synthesis will be of interest to pavement designers, construction engineers, maintenance engineers, and others interested in avoiding or limiting moisture damage in asphalt concrete. Information is provided on physical and chemical explanations for moisture damage in asphalt concrete, along with a discussion of current practices and test methods for determining or reducing the susceptibility of various asphalt concrete components and mixtures to such damage. Moisture damage in asphalt concrete is a nationwide problem which often necessitates premature replacement of highway pavement surfaces. This report of the Transportation Research Board describes the underlying physical and chemical phenomena responsible for such damage. Current test methods used to determine the susceptibility of asphalt concretes, or their constituents, to moisture damage are described and evaluated. Additionally, current practices for minimizing the potential for moisture damage are examined.
Author: Stephen A. Cross
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 120
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Book Description
Moisture damage of asphalt mixes, better known as stripping, is a major distress affecting pavement performance. AASHTO T 283 (KT-56) has been used by many agencies over the past decade to detect moisture susceptible pavements through the determination of a tensile strength ratio (TSR). Results from AASHTO T 283 (KT-56) have been inconsistent. As a result, there has been increased interest in finding an alternative test method. Preliminary indications reveal that loaded wheel rut testers, such as the Asphalt Pavement Analyzer (APA), have the potential to detect moisture susceptible mixtures. To date no standard test methodology has been developed. The objective of this project was to evaluate the effects of sample preconditioning on APA rut depths and to further evaluate the APA's suitability for predicting moisture susceptible mixtures. Eight different mixes from seven project sites were evaluated with the APA. Samples were tested at 40 deg C using four different preconditioning procedures: dry, soaked, saturated, and saturated with a freeze cycle. The results were compared with TSR values, methylene blue values and sand equivalent. The APA was able to identify every mix with a failing TSR.
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 : 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.
