01155549

Component

This paper presents a laboratory and field study to evaluate the mean profile depth (MPD) parameter that represents the surface texture of chip seal pavements. The 3-D laser profiler is used to determine the MPD values from field pavement sections and field samples tested in the laboratory by the third-scale Model Mobile Loading Simulator (MMLS3). Data obtained from five different field-constructed chip seal sections are used to evaluate the effects of different factors on the MPD of chip seal pavements, including aggregate type, emulsion application rate, field versus MMLS3 traffic loading, and traffic volume. The results presented in this paper suggest: (1) that the chip seal pavements constructed using lightweight aggregate have larger initial MPD values and faster reduction in the MPD as a function of number of wheel passes than those constructed using granite 78M aggregate; (2) that the MPD values from the dryer section drops faster initially and more significantly, resulting in a much smaller ultimate MPD value; (3) that in general the MPD values under the MMLS3 loading are similar to those under the field traffic loading, thus allowing the translation of the laboratory MMLS3 data to the field response; and (4) that the shorter rest periods in the higher traffic volume road retards the recovery of the binder and therefore greater permanent changes in the MPD.

01147878

10-3834

English

16p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures (7) ; Photos (5) ; References (11) ; Tables (1)

Aggregates; Asphalt pavements; Bituminous materials; Chip seals; Concrete curing; Granite; Seal coats; Surface course (Pavements); Traffic loads; Traffic volume

Mean profile depth; Surface treatments

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

Transportation Research Board Annual Meeting 2010 Paper #10-3834

TRIS, TRB

Jan 25 2010 11:57AM