Effect of Calcination on the Thermal Properties of Bricks Done From Clay-Expanded Perlite on Insulating Walls

Youssef Maaloufa,Soumia Mounir,Jalal Kettar,Abdelhamid Khabbazi

doi:10.19026/rjaset.12.2337

Youssef Maaloufa, Soumia Mounir + Show 2 more

Open Access

https://doi.org/10.19026/rjaset.12.2337

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Abstract

Insulation of building envelope has become a necessity in order to reduce the energy cost, that's why, we proceeded in this study to develop materials using clay and expanded perlite by doing several studies: the first concerns the variation of volume fraction on expanded perlite and the effect of the calcination on the thermal properties of the composite clay-expanded perlite. The second is the study of the distribution of temperature inside walls composed from the composite clay-expanded perlite. In order to achieve the results wanted, this study has been divided on several steps among them the determination of the kind of clay by means of X-ray diffraction. The results show that the clay sample is mainly made up of Illite/muscovite. Then the characterization of thermal properties of clay-expanded perlite before and after calcination. The third step, is the comparison of the experimental results with analytical models of equivalent thermal conductivity. The results show that the thermal conductivity decreases by adding expended perlite and calicination from 0.51(clay alone) to 0.258 (clay-100% expanded perlite) (W/m/K). Also, the calcination decreases the depth of heat flow diffusion by 5 cm and retards the diffusion of heat flow.

Highlights

An improved performance material such as light weight, thermal conductivity, storage ... requires the development of new composite materials
A lot of work have done on clay such as the work of concerning the study of the effect of cork on the thermal properties of the composite clay-cork (Mounir et al, 2014; Muñoz et al, 2013) which object is the improvement of the thermal transmittance of single-brick walls of clay bricks lightened with paper pulp
The relation between the thickness and the time of diffusion of the heat flow inside a homogenous component inside building is defined as the product of heat capacity and thermal resistance of the same component: Fig. 11: Results of the experimental thermal conductivities confronted to the theoretical model for mixture of clay-expanded perlite = ˥$/I

Summary

Introduction

An improved performance material such as light weight, thermal conductivity, storage ... requires the development of new composite materials. The effect of the variation of the volume fraction of expanded perlite and calcination on the thermal properties of the brick is studied.

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