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Materials 2017, 10(2), 176; doi:10.3390/ma10020176

Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties

1
Faculty of Engineering Mochis, Autonomous University of Sinaloa, Fuente de Poseidón y Ángel Flores s/n, Col. Jiquilpan, Module B2, Los Mochis, Sinaloa 81210, Mexico
2
Barcelona School of Building Construction, Polytechnic University of Catalonia, Av. Doctor Marañón 44-50, Barcelona 08028, Spain
3
Barcelona School of Civil Engineering, Polytechnic University of Catalonia, C. Jordi Girona 1-3, Building C2, Barcelona 08034, Spain
*
Author to whom correspondence should be addressed.
Received: 16 December 2016 / Accepted: 7 February 2017 / Published: 14 February 2017
(This article belongs to the Section Porous Materials)
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Abstract

In the field of construction, sustainable building materials are currently undergoing a process of technological development. This study aims to contribute to understanding the behavior of the fundamental properties of concretes prepared with recycled coarse aggregates that incorporate a polyethylene terephthalate (PET)-based additive in their matrix (produced by synthesis and glycolysis of recycled PET bottles) in an attempt to reduce their high porosity. Techniques to measure the gas adsorption, water porosity, Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to evaluate the effect of the additive on the physical, mechanical and microstructural properties of these concretes. Porosity reductions of up to 30.60% are achieved with the addition of 1%, 3%, 4%, 5%, 7% and 9% of the additive, defining a new state in the behavioral model of the additive (the overdosage point) in the concrete matrix; in addition, the porous network of these concretes and their correlation with other physical and mechanical properties are also explained. View Full-Text
Keywords: PET additives; recycled concrete; concrete porosity; polymeric resins; porosimetry of gas adsorption; acoustic resonance spectroscopy PET additives; recycled concrete; concrete porosity; polymeric resins; porosimetry of gas adsorption; acoustic resonance spectroscopy
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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. (CC BY 4.0).

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MDPI and ACS Style

Mendivil-Escalante, J.M.; Gómez-Soberón, J.M.; Almaral-Sánchez, J.L.; Cabrera-Covarrubias, F.G. Metamorphosis in the Porosity of Recycled Concretes Through the Use of a Recycled Polyethylene Terephthalate (PET) Additive. Correlations between the Porous Network and Concrete Properties. Materials 2017, 10, 176.

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