01151057

Component

In recent years, significant amount of research effort has been spent by engineers worldwide to develop alternative asphalt surface mixtures that are quieter, safe, and durable. These mixtures typically have very high air-void contents, placed in thin layers, and compacted in a way different from conventional dense-graded asphalt mixtures. Different compaction methods have been applied to fabricate specimens in laboratory studies. The effect of compaction on mix performance has not been sufficiently studied. This paper investigates the impact of compaction methods on the performance of quiet (porous) asphalt mixtures. Four different compaction methods are included: Marshall impact, Hveem kneading, Superpave gyratory, and rolling wheel compaction. The rolling wheel compaction is selected as a surrogate for field compaction. Specimens of four different porous mixtures with nominal maximum aggregate sizes varying from 4.75 mm to 19.0 mm are compacted by the four methods, and are tested for various performance indices, including permeability, sound absorption, moisture sensitivity, and resistance to raveling and aging. It is found that each compaction method has its own advantages and disadvantages. The effect of compaction methods also varies with the aggregate gradation. Mix performance indices also have different sensitivities to the compaction method.

01147878

10-2736

English

17p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (10) ; References (12)

Air voids; Asphalt mixtures; Bituminous materials; Dense graded aggregates; Pavement layers; Porous materials; Superpave; Traffic noise

Marshall compaction; Rolling wheel compaction

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

Transportation Research Board Annual Meeting 2010 Paper #10-2736

PRP, TRIS, TRB

Jan 25 2010 11:20AM