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Advances in Civil Engineering
Volume 2017, Article ID 3040818, 9 pages
https://doi.org/10.1155/2017/3040818
Research Article

Influence of Crumb-Rubber in the Mechanical Response of Modified Portland Cement Concrete

1Department of Civil Engineering, FES Aragón, National Autonomous University of Mexico, 57130 Nezahualcoyotl, MEX, Mexico
2Department of Structural Engineering, Institute of Engineering, National Autonomous University of Mexico, Coyoacán, 04510 Mexico City, Mexico

Correspondence should be addressed to J. Retama; xm.manu.dadinumoc@vamaterj

Received 10 February 2017; Accepted 3 April 2017; Published 2 May 2017

Academic Editor: Peng Zhang

Copyright © 2017 J. Retama and A. G. Ayala. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The influence of crumb-rubber on the mechanical properties of Portland cement concrete (PCC) is studied by experimental tests and numerical simulations. The main hypothesis of the study is that replacing part of the stone aggregate with crumb-rubber in the mix modifies the energy dissipation during the cracking process and affects the concrete behaviour under monotonically increasing loads. The experimental research program characterizes the mechanical properties of PCC for three different types of concrete with a variable content of crumb-rubber. The experimental results showed that fracture energy and other properties are directly related to the rubber fineness used in the mixture. The material properties derived for these laboratory tests are used to study, by numerical models, its response through its damage evolution. The numerical model used to simulate the damage evolution of the concrete is the Embedded Discontinuity Method (EDM). One characteristic of the EDM is that it does not need to modify the mesh topology to propagate the damage through the continuum solid. For this study, the Disk-Shaped Compact Tension specimen geometry, normed by the D7313-13 of the ASTM, is used. Results showed that the numerical methods provide good approximation of the experimental curve in the elastic and softening branches.