Effect of Antistripping Additives on the Compaction of Bituminous Concrete PDF Download
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Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt cement
Languages : en
Pages : 13
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Book Description
The objective of this investigation was to determine the effect of antistripping additives on the compaction of bituminous concrete. To do this, the densities obtained on test sections with and without additive were compared. Comparisons of nuclear densities and the void contents of cores from the pavement revealed no significant differences. Also, there were no significant differences in the optimum numbers of roller passes required to attain maximum density on the sections with and without additive. The properties of the asphalt cement were probably not influenced enough by the additives to affect compaction. Based on the results of this investigation, the inability to achieve the desired density should not be attributed to the use of antistripping additives.
Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt cement
Languages : en
Pages : 13
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Book Description
The objective of this investigation was to determine the effect of antistripping additives on the compaction of bituminous concrete. To do this, the densities obtained on test sections with and without additive were compared. Comparisons of nuclear densities and the void contents of cores from the pavement revealed no significant differences. Also, there were no significant differences in the optimum numbers of roller passes required to attain maximum density on the sections with and without additive. The properties of the asphalt cement were probably not influenced enough by the additives to affect compaction. Based on the results of this investigation, the inability to achieve the desired density should not be attributed to the use of antistripping additives.
Author: David G. Tunnicliff
Publisher: Transportation Research Board
ISBN: 9780309053747
Category : Technology & Engineering
Languages : en
Pages : 68
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Book Description
Author: Michael K. Ho
Publisher:
ISBN:
Category : Bituminous materials
Languages : en
Pages : 74
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Book Description
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: G. W. Maupin
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 24
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Book Description
Stripping has long been recognized as a cause of asphalt pavement damage. Water may get between the asphalt film and the aggregate surface, causing an adhesive failure, or water may combine with the asphalt to affect the cohesive strength of the material. Various types of antistripping additives have been used in the attempt to alleviate or eliminate stripping. The Virginia Department of Transportation has used antistripping additives in some of its asphalt mixes since the 1960's. In the 1980's hydrated lime was found to outperform several al chemical additives. VDOT began to require asphalt contractors to use chemical additives that produced test results equal or superior to hydrated lime. Presumably, chemical additives were then improved to compete with hydrated lime. This study was undertaken to find if the new generation of additives prevented stripping in Virginia's hot mix asphalt. Twelve test sections were established, 9 using chemical additives and 3 containing hydrated lime. After 3 to 4 years, eight of the sections containing chemical additive demonstrated considerable visual stripping in cores. The sections containing hydrated lime showed much less stripping. The TSR test used on mix sampled during construction did not accurately predict the stripping that occurred. A follow-up survey of existing pavements should be conducted to verify the possible inadequacy of some chemical additives. Also, the TSR test should be examined and possibly modified to more closely duplicate Virginia's environmental conditions.
Author: Waterways Experiment Station (U.S.)
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 122
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Book Description
Author: ASTM Committee D-4 on Road and Paving Materials
Publisher: ASTM International
ISBN: 9780803102231
Category : Technology & Engineering
Languages : en
Pages : 160
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Book Description
Author: Kathryn Page Copeland
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
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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.
