Document Type

Article

Publication Date

2012

Journal or Book Title

Proceedings of the ICE - Construction Materials

Volume

165

Issue

6

First Page

355

Last Page

365

DOI

10.1680/coma.11.00007

Abstract

The resilient modulus (MR) of unbound materials is a required input in most of the mechanistic-based pavement analysis and design process and has a significant effect on the projected pavement performance in the mechanistic– empirical pavement design guide programme or AASHTOWare DARwin. The Iowa Department of Transportation (DOT) recently acquired a servo-hydraulic dynamic loading materials test system known as the Nottingham asphalt tester (NAT). The Iowa DOT NAT is a hybrid servo-hydraulic machine designed for testing not only hot-mix asphalt performance properties but also unbound materials’ MR (although this has not been verified so far). The primary objectives of this research are to update and verify the capacity of the Iowa DOT hybrid NAT for testing unbound material’s MR through a detailed laboratory testing programme and regression analyses using non-linear stress-dependent models.

Research Focus Area

Construction Engineering and Management, Transportation Engineering

Comments

This article is from Proceedings of the Institution of Civil Engineers - Construction Materials 165 (2012): 355-365, doi: 10.1680/coma.11.00007

Copyright Owner

ICE Publishing

Language

en

File Format

application/pdf

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