01518136

Component

The objective of this research study was to conduct a laboratory investigation of reclaimed asphalt pavement (RAP) containing high percentage of natural sand mixtures in terms of moisture susceptibility, permanent deformation, and fracture energy with respect to the use of both hydrated lime and liquid anti-stripping additives (ASAs). The experimental design included one base binder, one natural sand, three ASAs, two aggregate sources, two RAP contents, and two surface mix types (Type B and C). A total of 12 mixtures were investigated and a total of 160 specimens were made and tested in this study. The test results indicated that the indirect tensile strength (ITS) and tensile strength ratio (TSR) values of RAP with 20% natural sand showed that hydrated lime and liquid ASAs could be used to resist the moisture damage regardless of the aggregate source. In addition, the rut depths of surface C mixtures were generally less than 5 mm irrespective of aggregate source and ASA type. Moreover, various ASAs, aggregate source, and surface type slightly affect the dissipated energy of wet samples. Furthermore, there are some correlations between dissipated energy and its corresponding ITS values in general, in terms of aggregate source and surface type used in this study.

This paper was sponsored by TRB committee AFK40 Characteristics of Asphalt-Aggregate Combinations to Meet Surface Requirements.

01503729

14-3500

English

14p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; References; Tables

Antistrip additives; Asphalt mixtures; Calcium hydroxide; Laboratory tests; Moisture damage; Reclaimed asphalt pavements; Rutting; Sand; Tensile strength

Aggregate sources; Fracture energy; Indirect tensile strength; Moisture susceptibility; Tensile strength ratio

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

Transportation Research Board Annual Meeting 2014 Paper #14-3500

TRIS, TRB, ATRI

Jan 27 2014 3:12PM