D.H. Nguyen This email address is being protected from spambots. You need JavaScript enabled to view it.1, H. Le Quang2, T.-D. Nguyen1, A.-T. Tran3, and T. A. Do3
1University of Transport and Communications, Department of Construction Materials, 3 Cau Giay, Dong Da, Hanoi, Vietnam 2MSME, Univ Gustave Eiffel, CNRS UMR 8208, Univ Paris Est Creteil, F-77454 Marne-la-Vallee, France 3University of Transport and Communications, Department of Bridge Engineering and Underground Infrastructure, 3 Cau Giay, Dong Da, Hanoi, Vietnam
Received: November 30, 2021 Accepted: February 16, 2022 Publication Date: April 7, 2022
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
The present work aims to estimate the macroscopic thermal conductivity of fine concretes with recycled PET (Polyethylene terephthalate) flakes (Concrete withWaste Recycled Plastic - CWRP). To achieve this objective, the PET flakes are first assumed to exhibit a penny-shaped inclusion form whose aspect thickness/width (t/w) ratio is given as t/w = 1/33.33. These PET flakes are then supposed to be randomly distributed and oriented in a mortar phase consistuting of a cement paste (matrix) and silicious sand (inclusions). Next, a simple analytical two-scale homogenization method based both on different homogenization schemes and on the Eshelby’s solution is proposed to determine first at the mesoscopic scale the conductivity of the mortar and compute then at the macroscopic scale the effective conductivity of the fine concrete with recycled PET flakes. Finally, by varying the volume percentage of sand including 5, 10, 15, 30, 50 and 100 % of PET flakes, we show that the analytical results obtained for the effective thermal conductivity of CWRP by using the analytical homogenization method are in good agreement with experimental values.
Keywords: Homogenization method, Eshelby’s solution, Thermal conductivity, Fine concete with recycled pet flakes
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