Laboratory Evaluation Of Typical Adot Asphalt Concrete
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Author | : Michael S. Mamlouk |
Publisher | : |
Total Pages | : 78 |
Release | : 1990 |
Genre | : Pavements, Asphalt concrete |
ISBN | : |
A typical Arizona Department of Transportation (ADOT) asphalt concrete mixture was evaluated based on the Asphalt-Aggregate Mixture Analysis System (AAMAS) procedure (NCHRP Project 9-6(1)). Two sets of ADOT asphalt concrete specimens were prepared using the California kneading compactor and the Marshall hammer. All tests recommended by the AAMAS project were performed. The test results were analyzed using the AAMAS guidelines. It was found that the diametral resilient moduli of the ADOT mixture are within the acceptable range. A typical AASHTO structural layer coefficient is recommended. The rutting potential is low in some cases and moderate in other cases. Recommendations for the evaluation of fatigue cracking and thermal cracking are provided. The potential for moisture damage is high, while the potential for disintegration is marginal.
Author | : Lowell J. Zearley |
Publisher | : |
Total Pages | : 36 |
Release | : 1978 |
Genre | : Asphalt concrete |
ISBN | : |
Author | : Anne Stonex |
Publisher | : |
Total Pages | : 268 |
Release | : 2007 |
Genre | : Asphalt-rubber |
ISBN | : |
A research project was conducted to identify and document current modifications to ARIZONA 815c (75-blow Marshall method) used to develop gap-graded asphalt rubber asphalt concrete (GG AR AC) mix designs, and to develop and test improvements to provide a standard mix design method for use by contractors and consultants. Based on field performance data provided by the Arizona Department of Transportation (ADOT), the existing mix design method was successful and should serve as the standard for comparison of proposed improvements. Best practices were synthesized to develop proposed improvements. Three aggregate sources and two asphalt rubber (AR) binders were used for initial testing of the existing (control) mix design method and of the proposed changes. Rebound of compacted AR AC specimens was evaluated, as were Rice test results at 6% and 7% AR binder by weight of mix. The composition of the AR binders (rubber gradation and content) had more effect on the results than which mix design method was used. Additional replicate testing was performed by MACTEC and ADOT to confirm these findings. Changes to the AR AC mix design method consist primarily of making and curing Rice specimens in the same manner as Marshall specimens, tighter temperature ranges for mixing and compaction, incorporating Asphalt Institute calculations in a "User's Guide," and improving presentation. An ADOT construction project was used as an "acid test" to pilot the proposed mix design method and provide materials for a four-laboratory round robin to evaluate the precision of testing AR AC materials. The precision of round robin testing appears very similar to that of conventional asphalt concrete mixtures based on data from Proficiency Sample Programs of the AASHTO Materials Reference Laboratory and ADOT. The results indicate that the mix design method developed can be used by qualified laboratories to provide suitable AR AC mix designs
Author | : Rudolf August Jimenez |
Publisher | : |
Total Pages | : 40 |
Release | : 1984 |
Genre | : Pavements, Asphalt |
ISBN | : |
Author | : John Harvey |
Publisher | : |
Total Pages | : 530 |
Release | : 1994 |
Genre | : Pavements |
ISBN | : |
Author | : Arizona. Department of Transportation |
Publisher | : |
Total Pages | : 118 |
Release | : 1989 |
Genre | : Pavements, Asphalt concrete |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 266 |
Release | : 2004 |
Genre | : Asphalt |
ISBN | : |
Author | : Dimitirios G. Goulias |
Publisher | : |
Total Pages | : 474 |
Release | : 1997 |
Genre | : Asphalt concrete |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 38 |
Release | : 1980 |
Genre | : Asphalt concrete |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 340 |
Release | : 1994 |
Genre | : Highway engineering |
ISBN | : |