Evaluation Of Test Methods To Predict Moisture Damage In Asphalt Concrete
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Author | : Bradley J. Bruce |
Publisher | : |
Total Pages | : 0 |
Release | : 1990 |
Genre | : Pavements, Asphalt |
ISBN | : |
The actual moisture susceptibility of 10 bituminous mixtures placed in the field was compared to the moisture susceptibility that was predicted during the laboratory evaluation of the same mix design. Laboratory mixtures were evaluated using the modified Lottman procedure and the Root-Tunnicliff procedure, in addition to routine moisture susceptibility testing which includes immersion compression testing. After two years, cores were taken from the field projects. The condition of the cores and their present susceptibility to moisture damage were determined by performing modified Lottman and Root-Tunnicliff testing. A feature of the evaluation process was the use of the ACMODAS program to predict the remaining service life of the plant mix cores.
Author | : Russell G. Hicks |
Publisher | : Transportation Research Board |
Total Pages | : 104 |
Release | : 1991 |
Genre | : Technology & Engineering |
ISBN | : 9780309049245 |
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 | : Robert P. Lottman |
Publisher | : |
Total Pages | : 21 |
Release | : 1982 |
Genre | : Pavements, Asphalt concrete |
ISBN | : |
Author | : Kevin D. Stuart |
Publisher | : |
Total Pages | : 36 |
Release | : 1986 |
Genre | : Pavements, Asphalt |
ISBN | : |
Procedures for evaluating the moisture susceptibility of asphalt mixtures were compared by performing them on mixtures having a known history of susceptibility. Data included the retained ratios, visual stripping, mechanical values (tensile strength, stability, etc.), saturation, and swell. The most promising procedures appeared to be the NCHRP 246 and NCHRP 274.
Author | : |
Publisher | : |
Total Pages | : 192 |
Release | : 1999 |
Genre | : |
ISBN | : |
Author | : Mansour Solaimanian |
Publisher | : Transportation Research Board |
Total Pages | : 79 |
Release | : 2007 |
Genre | : Bituminous materials |
ISBN | : 0309099064 |
Explores whether combining the environmental conditioning system with the simple performance test would provide a superior procedure for determining the moisture susceptibility of hot-mix asphalt (HMA).
Author | : Bradley J. Bruce |
Publisher | : |
Total Pages | : 104 |
Release | : 1978 |
Genre | : |
ISBN | : |
Many asphalt, aggregate, mineral filler and chemical additive combinations were tested for the correlation of the 'E' Modulus Test with visual assessment of the condition of the asphalt aggregate specimen and the results of other tests methods including Marshall Method, Resilient Modulus, Immersion Compression and Maximum Tensile Stress. Specimens used in conventional tests were treated in the manner prescribed by the method. Specimens for 'E' Modulus, Resilient Modulus and Maximum Tensile Stress were tested both before and after subjecting them to severe artificial conditions that were conceived as comparable to several years of natural exposure to the elements. 'E' Modulus was judged to be too inconsistent with other variables to be used as an acceptable criteria. The data suggests that Maximum Tensile Stress and Resilient Modulus tests would be valid tools for the evaluation of asphalt aggregate susceptibility to moisture damage. Immersion Compression data could be interpreted to provide information about stripping resistance and could serve to aid in the fabrication of mixes with reduced moisture susceptibility. The Marshall Method Testing provided inconsistent indications of moisture susceptibility using either flow or stability values.
Author | : Andrew Hanz |
Publisher | : |
Total Pages | : 216 |
Release | : 2007 |
Genre | : Adhesion |
ISBN | : |
Author | : K. D. Stuart |
Publisher | : |
Total Pages | : 28 |
Release | : 1986 |
Genre | : Pavements, Asphalt |
ISBN | : |
Procedures for evaluating the moisture susceptibility of asphalt mixtures were compared by performing them on mixtures having a known history of susceptibility. Data included the retained ratios, visual stripping, mechanical values (tensile strength, stability, etc.), saturation, and swell. The most promising procedures appeared to be the NCHRP 246 and NCHRP 274.
Author | : Brij D. Shah |
Publisher | : |
Total Pages | : |
Release | : 2003 |
Genre | : |
ISBN | : |
Pavements are a major part of the infrastructure in the United States. Moisture damage of these pavements is a significant problem. To predict and prevent this kind of moisture damage a great deal of research has been performed on this issue in past. This study validates an analytical approach based on surface energy aimed at assessing moisture damage. Two types of bitumen and three aggregates are evaluated in the study. The two types of bitumen represent very different chemical extremes and the three aggregates (a limestone, siliceous gravel, and granite) represent a considerable range in mineralogy. Moisture damage was monitered as a change in dynamic modulus with load cycles. The analysis demonstrates the need to consider mixture compliance as well as bond energy in order to predict moisture damage. Mixtures with the two types of bitumen and each aggregate with and without hydrated lime were evaluated. The hydrated lime substantially improved the resistance of the mixture to moisture damage.