01122418

Component

With the increasing awareness of building sustainable transportation systems, recycled materials and industrial byproducts are increasingly being used for highway construction, especially in pavement base course. When compared to traditional base materials, such as crushed aggregates, the recycled materials and industrial byproduct often have unique properties. The physical properties of recycled materials and industrial byproducts have to be characterized for the purpose of pavement design. This study evaluated the properties of three base materials used at MnROAD test facility: full-depth reclaimed pavement material (RPM), RPM stabilized with high carbon high calcium fly ash, and crushed aggregates as control, in terms of resilient modulus (Mr) and California Bearing Ratio (CBR). Unconfined compressive strength (Qu) and flexural strength of fly ash stabilized RPM were also evaluated. These properties are essential for the mechanistic-empirical pavement design guide (MEPDG) of flexible pavement with either bound or unbound granular base materials. This paper also studied the Level 2 input in the MEPDG for prediction of Mr or flexural strength from other routine tests, such as CBR (unbound material) or Qu (bound materials). In addition, the effects of testing protocols on the Mr measurements were investigated.

01120148

09-3160

English

13p

2009

Transportation Research Board 88th Annual Meeting

DVD

Figures (5) ; References (12) ; Tables (1)

Base course (Pavements); California bearing ratio; Compressive strength; Flexural strength; Fly ash; Laboratory tests; Pavement design; Soil mechanics

Mechanistic-Empirical Pavement Design Guide

Resilient modulus

Minnesota

Construction; Geotechnology; Highways; Pavements; I52: Construction of Pavements and Surfacings

Transportation Research Board Annual Meeting 2009 Paper #09-3160

TRIS, TRB

Jan 30 2009 7:33PM