Document Type

Article

Publication Date

2012

Journal or Book Title

Journal of Transportation Engineering

Volume

138

Issue

4

First Page

406

Last Page

413

DOI

10.1061/(ASCE)TE.1943-5436.0000348

Abstract

Rubblization is considered one of the sustainable surface preparation techniques before placing a hot mix asphalt (HMA) overlay that involves breaking the concrete pavement into pieces. The design of the structural overlay thickness for rubblized projects is difficult as the resulting structure is neither a true rigid pavement nor a true flexible pavement. The most important aspect of the design procedure is to characterize the rubblized concrete layer in terms of a layer coefficient and modulus for the empirical and the mechanistic-empirical (M-E) pavement design methods. This paper describes a field study undertaken to investigate the performance of rubblized pavements in Iowa, which includes characterization of the rubblized Portland cement concrete (PCC) layer (layer coefficient and modulus) using a neural networks-based layer moduli backcalculation program. The average rubblized PCC layer coefficient and backcalculated modulus of the rubblized layer in Iowa were found to be 0.19 and 539 MPa (78 ksi), respectively. The M-E design program developed in-house seems to estimate the HMA overlay thickness reasonably well to achieve long-lasting performance of HMA-overlaid rubblized PCC pavements.

Research Focus Area

Transportation Engineering

Comments

This is a manuscript of an article from Journal of Transportation Engineering 138 (2012): 406, doi: 10.1061/(ASCE)TE.1943-5436.0000348.

Copyright Owner

American Society of Civil Engineers

Language

en

File Format

application/pdf

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