Mechanical Response of a Sand, Reclaimed-Asphalt Pavement, and Portland Cement Mixture
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 9
Abstract
This research was developed for the evaluation of the mechanical response of a mixture of soil and reclaimed-asphalt pavement (RAP) stabilized with cement. Mixtures were made containing 70% Osorio sand and 30% reclaimed-asphalt pavement (RAP), and portland cement. Tests of unconfined strength, pulse-velocity, durability, and simple shear were performed. The unconfined strength tests showed that the porosity/cement index controls the unconfined compressive, splitting tensile, and flexural tensile strength of the mixtures. The replacement of part of the Osorio sand by RAP did not present an expressive drop of strength in these tests. The pulse-velocity test presented that the initial shear modulus and the porosity/cement index, unconfined compressive strength, and tensile strength could be related. Wetting–drying durability tests displayed that the accumulated loss of mass increased when the cement content and the dry unit weight decreased. The monotonic shear response showed that the inclusion of RAP positively influenced the internal friction angle of the material and the cohesive intercept presented higher values for samples with lower porosity/cement index. The cyclic shear response presented that the shear modulus degradation was lower when the stress variation was lower. For higher variations, the degradation was greater.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors wish to express their gratitude to the Brazilian Research Council CNPq for supporting the research group (Grant Nos. 307289/2018-4 and 407593/2016-0).
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 9 • September 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 10, 2021
Accepted: Jan 6, 2022
Published online: Jun 22, 2022
Published in print: Sep 1, 2022
Discussion open until: Nov 22, 2022
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