Effect of cementation level on performance of rubberized cement-stabilized aggregate mixtures

Farhan, Ahmed Hilal and Dawson, Andrew Robert and Thom, Nicholas Howard (2016) Effect of cementation level on performance of rubberized cement-stabilized aggregate mixtures. Materials & Design, 97 . pp. 98-107. ISSN 0264-1275

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An investigation and comparison is made of the effect of cement content on the performance of rubberized cement-stabilized aggregate mixtures and on cement-stabilized aggregate mixtures containing no rubber (RCSAMs and CSAMs). These materials are intended to be used as a base course for pavement structures. Three cement contents (3%, 5%, and 7% by dry weight of aggregate) were investigated. Rubberized mixtures were manufactured by replacing 30% of one aggregate fraction that has a similar gradation of crumb rubber. Performance was evaluated under static and dynamic testing. The investigated properties are unconfined compressive strength, indirect tensile strength, indirect tensile static modulus, toughness, dynamic modulus of elasticity, dynamic modulus of rigidity and dynamic Poisson's ratio. Increasing cement content increases strength of both types of mixtures, especially in the CSAMs. It is found that using crumb rubber at low cement content is more feasible than with high cement contents. Stiffnesses increased for both types of mixture as cement content increased but decreased on incorporation of crumb rubber. Energy absorption capacity was inversely related to stiffness. Mesostructural investigation revealed that the cracks were propagated through the rubber particles for all cement contents.

Item Type: Article
Keywords: Cement-stabilized aggregate; Unconfined compressive strength; Indirect tensile testing; Rubberized cement-stabilized mixture; Resonant frequency; Static modulus of elasticity
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Civil Engineering
Identification Number: https://doi.org/10.1016/j.matdes.2016.02.059
Depositing User: Lashkova, Mrs Olga
Date Deposited: 11 Jul 2016 09:47
Last Modified: 17 Sep 2016 16:06
URI: http://eprints.nottingham.ac.uk/id/eprint/34787

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