SYMPOSIA PAPER Published: 01 January 1985
STP35329S

Maximizing the Beneficial Effects of Lime in Asphalt Paving Mixtures

Source

Laboratory and field tests were conducted to evaluate the use of hydrated lime as an antistrip additive in hot mix asphalt concrete. Batch and drum mix plants were used to prepare the paving mixtures. Lime was added dry and in slurry form. Individual aggregates and the total aggregate were separately treated with lime slurry and allowed to age for different time periods from a few minutes to 30 days before mixing with asphalt. Laboratory mixed and plant mixed asphalt concrete was tested using indirect tension and resilient modulus before and after moisture conditioning. Results indicate that lime is effective in reducing moisture susceptibility and that it is most effective when applied in the presence of moisture. In addition, a time delay after application of lime to aggregate is unnecessary. There are no significant differences in mixtures produced in batch and drum plants.

Author Information

Button, JW
Texas Transportation Institute, Texas A&M University, College Station, TX
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Details
Developed by Committee: D04
Pages: 134–146
DOI: 10.1520/STP35329S
ISBN-EB: 978-0-8031-4954-0
ISBN-13: 978-0-8031-0460-0