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ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.3/5 (555 download)
Download or read book Effectiveness of Antistripping Additives: Final report written by and published by . This book was released on 1989 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. W. Maupin
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (359 download)
Download or read book Effectiveness of Antistripping Additives in the Field written by G. W. Maupin and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (555 download)
Download or read book Effectiveness of Antistripping Additives: Literature review written by and published by . This book was released on 1989 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (13 download)
Download or read book Laboratory investigation of hydrated lime as an antistripping additive written by and published by . This book was released on 1983 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this laboratory study was to determine the effectiveness of hydrated lime as an antistripping additive when used in bituminous mixes incorporating aggregates frequently used in such mixes in Virginia. The application of 1% hydrated lime to dry aggregate deterred stripping in 60% of the mixes tested. Applied at the same rate to wet aggregate, the hydrated lime decreased the stripping susceptibility to or very near an acceptable level for all but one mix. An aggregate dust coating reduced the effectiveness of the lime in one mix. It has been recommended that the use of hydrated lime as an antistripping additive be allowed.
Author : David G. Tunnicliff
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.3/5 (555 download)
Download or read book Use of Antistripping Additives in Asphaltic Concrete Mixtures written by David G. Tunnicliff and published by Transportation Research Board National Research. This book was released on 1984 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Russell G. Hicks
Publisher : Transportation Research Board
ISBN 13 : 9780309049245
Total Pages : 104 pages
Book Rating : 4.0/5 (492 download)
Download or read book Moisture Damage in Asphalt Concrete written by Russell G. Hicks and published by Transportation Research Board. This book was released on 1991 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.3/5 (91 download)
Download or read book Federally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1985 written by and published by . This book was released on 1986 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David G. Tunnicliff
Publisher : Transportation Research Board
ISBN 13 : 9780309053747
Total Pages : 68 pages
Book Rating : 4.0/5 (537 download)
Download or read book Use of Antistripping Additives in Asphaltic Concrete Mixtures written by David G. Tunnicliff and published by Transportation Research Board. This book was released on 1995 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bradley J. Putnam
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (1 download)
Download or read book Laboratory Evaluation of Anti-strip Additives in Hot Mix Asphalt written by Bradley J. Putnam and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.3/5 (91 download)
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1993 written by and published by . This book was released on 1993 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J.G. Cabrera
Publisher : CRC Press
ISBN 13 : 0203223276
Total Pages : 348 pages
Book Rating : 4.2/5 (32 download)
Download or read book Performance and Durability of Bituminous Materials written by J.G. Cabrera and published by CRC Press. This book was released on 2003-09-02 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers new advances in materials and methods, particularly orientated towards the optimization of energy expenditure required for the preparation of aggregates, bituminous binders and bituminous mixtures and the implications which arise with regard to the European specifications and codes of practice.
Author : G. W. Maupin
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (1 download)
Download or read book Quantitative Determination of Asphalt Antistripping Additive written by G. W. Maupin and published by . This book was released on 2004 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (3 download)
Download or read book Public Roads written by and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Cooperative Highway Research Program
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.3/5 (91 download)
Download or read book Summary of Progress - National Cooperative Highway Research Program written by National Cooperative Highway Research Program and published by . This book was released on 1994 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1226 pages
Book Rating : 4.:/5 (31 download)
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1947 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (31 download)
Download or read book Virginia State Documents written by and published by . This book was released on 2002 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. W. Maupin
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (213 download)
Download or read book Use of Hydrated Lime as an Antistripping Additive written by G. W. Maupin and published by . This book was released on 1983 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this investigation is to evaluate the effectiveness of hydrated lime as an antistripping additive in several test sections. The two sections installed in 1982 contain S-5 surface mixes with (1) hydrated lime, (2) a chemical additive, and (3) no additive. Stripping tests on the mixes have predicted that those containing hydrated lime are less susceptible to stripping than the identical mixes with conventional chemical additives. The construction of at least two additional test sections is planned for 1983.
