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Flexural properties of cemented granular materials for pavement design

Version 2 2024-06-02, 14:02
Version 1 2020-03-03, 14:24
conference contribution
posted on 2016-01-01, 00:00 authored by A Sounthararajah, L Wong, Nhu NguyenNhu Nguyen, H H Bui, J Kodikara, P Jitsangiam
Cementation stabilization of unbound granular materials often offers a feasible solution for the strengthening of existing degraded unbound pavements. The primary determination mode of cemented pavement materials is fatigue cracking. Flexural properties including flexural modulus and tensile strain at break are incorporated into the fatigue criteria of cemented materials. However, there are no universally accepted testing protocols available for cemented pavement materials to determine the aforementioned properties in the laboratory. The four-point bending test is chosen in this paper to study the flexural properties of two different cemented pavement materials as it more closely simulates the stress/strain gradients generated in service. The results from this study revealed that, the strain at break could not be determined with sufficient precision as the tensile strain at the bottom of the specimen just prior to the point of fracture increases uncontrollably without further increase in tensile stress. Based on the response of cemented materials to different loading conditions, an equation is tentatively proposed for determination of the modulus for pavement design.

History

Event

RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements (2016 : 8th :Nantes, France)

Volume

13

Pagination

403 - 409

Publisher

Springer

Location

Nantes, France

Place of publication

Berlin, Germany

Start date

2016-06-07

End date

2016-06-09

ISBN-13

9789402408676

ISBN-10

9402408673

Language

eng

Publication classification

E1.1 Full written paper - refereed

Editor/Contributor(s)

A Chabot, W Buttlar, E Dave, C Petit, G Tebaldi

Title of proceedings

RILEM 2016 :8th International Conference on Mechanisms of Cracking and Debonding in Pavements