Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete

Energies

Francesco Colangelo¹  Giuseppina De Luca¹  Claudio Ferone¹ 

[1] Department of Engineering, University of Napoli “Parthenope”, Centro Direzionale, Isola C4, 80143 Napoli, Italy;

关键词: geopolymer;    lightweight concrete;    thermal transmittance;    thermal conductivity;    heat transfer;    temperature contours;    vapor permeability;    numerical modeling;    recycled plastic waste aggregate;   

DOI  :  10.3390/en6116077

来源: mdpi

【 摘 要 】

The correct estimation of building energy consumptions is assuming an always increasing importance, and a detailed reproduction of building structures, with all the single components involved, is necessary to achieve this aim. In addition, the current ecological development tries to limit the use of natural raw materials as building components, in favor of alternative (waste) materials, which ensure significant advantages from the economic, energetic and environmental point of views. In this work, dynamic heat and vapor transport in a typical three-dimensional (3D) building structure, involving different types of environmental-friendly concrete mixtures, have been simulated by using finite elements. In particular, the authors propose to substitute part of the aggregates with plastic waste and to use a fly ash based geopolymeric binder for the production of low conductivity concrete, to be employed in eco-efficient buildings. Concrete produced with natural limestone aggregates has been considered as the reference benchmark. The whole characterization of the different types of concrete tested in the present work has been obtained through laboratory experiments. The structure taken into account in the simulations is a 3D thermal bridge, typical of building envelopes. The thermal and hygrometric transient behavior of this structure, employing plastic waste in different percentages and geopolymer concrete, has been analyzed by the authors.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.