This research evaluates the long term performance of reclaimed asphalt pavement – coal fly ash - carbide lime mixtures, with and without addition of 0.5% NaCl subjected to wet-dry (WD) and freeze-thaw (FT) cycles. The reuse of these by-products in layers of road pavements, reducing the consumption of natural resources and eliminating the disposal of these residues in undue places. The splitting tensile strength and unconfined compression, as well as the accumulated loss of mass, have been evaluated as a function of the porosity/volumetric content of lime index (η/Liv). The results showed that the mixtures submitted to wet-dry cycles presented better performance than when subjected to freeze-thaw cycles. An order of effectiveness (in terms of increasing freeze-thaw durability) can be stated: Dry unit weight increase (20.6%) > NaCl (11.8%) > Carbide Lime (19.7%). Drained triaxial compression tests in specimens with dry unit weight of 17kN/m3 and 7% lime yielded a 3.4° increase in the friction angle with the addition of 0.5% NaCl, while the cohesive intercept had an increase of 42.8kPa.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 email@example.com
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 firstname.lastname@example.org