01158053

Component

This paper presents an experimental study to characterize the mechanical behavior of bituminous mixtures containing high rates of RAP. Two semi-dense mixtures of 12 and 20 mm maximum aggregate size and containing 40 and 60% RAP, respectively (S-12 and S-20, in accordance with Spanish specifications), which were used for rehabilitation of a Spanish highway section, were evaluated. First, the effect of RAP variability on the recycled mixtures was analyzed. Their mechanical properties were then studied by determining the stiffness modulus and indirect tensile strength and applying a new direct tensile test, i.e. Fénix test, and the three-point bending beam test. Results show that high rates of recycled material can generally be incorporated into bituminous mixes by proper characterization and handling of RAP stockpiles.

01147878

10-2046

English

17p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (11) ; Maps (2) ; Photos (2) ; References (17) ; Tables (5)

Bituminous materials; Bituminous mixtures; Flexural strength; Mix design; Reclaimed asphalt pavements; Recycled materials; Stiffness matrix; Tensile strength

Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings

Transportation Research Board Annual Meeting 2010 Paper #10-2046

TRIS, TRB

Jan 25 2010 10:56AM