Detection of Antistripping Additives with Quick Bottle Test PDF Download
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Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 4
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Book Description
Several variations of the quick bottle test were evaluated to determine the procedure having the best repeatability. Naphtha was selected over kerosene and white gas as the solvent for use in the test, and room temperature was selected over 140°F as the test temperature. The procedure incorporating these variables was used to test several concentrations of three additives. The results revealed that in some cases the presence of additives was indicated in concentrations considerably less than the dosages specified in the field in Virginia. For this reason, the test is useful to check for the presence of additive, but not to indicate the concentration.
Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 4
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Book Description
Several variations of the quick bottle test were evaluated to determine the procedure having the best repeatability. Naphtha was selected over kerosene and white gas as the solvent for use in the test, and room temperature was selected over 140°F as the test temperature. The procedure incorporating these variables was used to test several concentrations of three additives. The results revealed that in some cases the presence of additives was indicated in concentrations considerably less than the dosages specified in the field in Virginia. For this reason, the test is useful to check for the presence of additive, but not to indicate the concentration.
Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 24
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Book Description
A small device (StripScan) has been developed by InstroTech, Inc., that uses litmus paper and a spectrophotometer to analyze vapors from hot liquid asphalt binders and mixtures to determine the percentage of antistripping additive present. Approximately 60 five-point additive content-color index count regressions were performed on binders and mixtures to determine how well the StripScan device measured additive content. The regressions basically fit the quadratic format that is used by the manufacturer in the recommended calibration process. The regressions were best when the litmus color index count was calculated by subtracting the initial count of the blank strip from the final count after exposure for the mixtures. Changes to the instrument software and testing temperature were necessary as the investigation progressed to accommodate different grades of binders. After the planned testing was completed, some retesting of the binders was performed using modified equipment and procedures. The changes appeared to improve the consistency of the results; therefore, the author believes that additive content in binders can be determined within +0.2 percent 95 percent of the time using the modified equipment and procedures. Test results for mixtures were less accurate than for binders; however, if the vapor trap is modified as described, the accuracy for mixtures should be improved substantially. Since the test can be performed quickly, multiple tests on a sample are possible. This would increase the confidence of the test results. Additional research and development is recommended and necessary before the device can be used for quality assurance testing. An accuracy of +0.1 percent is a worthy goal.
Author: Harry T. Craft
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 428
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Book Description
Author: Association of Asphalt Paving Technologists
Publisher:
ISBN:
Category : Asphalt industry
Languages : en
Pages : 664
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Book Description
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 1026
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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: 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:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1034
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Book Description
Author: Pennsylvania Transportation Institute
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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Book Description
Author: Asphalt Institute
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102
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Book Description
