01336730

Component

This research compares the open graded friction course (OGFC) mix design methods which are currently being used in the United States. OGFC is a type of porous pavement that has been used in the United States since 1944, but has provided inconsistent and highly variable performance results. The design procedures of several agencies were obtained, and then compared for similarities. Fourteen mix design methods were then conducted to determine the optimum binder contents (OBC) using two aggregate sources and a single aggregate gradation. The design methods which are currently used fall into three categories. The first is a property and performance specification where samples are compacted at various binder contents and tested for certain criteria to determine the OBC. The second is an oil absorption method where the oil absorption of the aggregate is used in a series of empirical calculations to determine the OBC. The final method is a visual determination where binder draindown is visually analyzed to determine the optimum binder content. The design methods produced optimum binder contents which had high variability. The oil absorption and visual determination methods all produced a single optimum binder content which varied over 0.5%. The property and performance specification results showed a range of results which were only capped by the binder content range used in research.

01329018

11-3747

English

17p

2011

Transportation Research Board 90th Annual Meeting

DVD

Figures (3) ; References (24) ; Tables (6)

Absorption; Aggregate gradation; Aggregates; Binder content; Friction course; Mix design; Oils; Open graded aggregates; Pavement design; Pavement performance; Porous materials

United States

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

Transportation Research Board Annual Meeting 2011 Paper #11-3747

TRIS, TRB

Feb 17 2011 6:37PM