دانلود رایگان مقاله عملکرد حرارتی آجر خاک رس در ساخت و ساز

ABSTRACT

The objective of this study is to demonstrate and to study the sustainability and the qualities of the earthen construction in real conditions. A demonstrative building was designed and built with unfired clay bricks, were industrially produced by the factory “Briqueteries du Nord” (BdN). This industrial plant is located in the north of France. This project aims to create conditions for the development of earthen construction techniques in the north of France. Moreover, it aims to prove the benefits of this material on the sanitary quality of the building. This article is composed of three parts. Firstly, the identification of raw materials was performed in order to study the mains properties of these building materials. The second part of this work presented an experimental study conducted to investigate the dynamic thermal performance of unfired clay bricks. To complete the tests already carried out in laboratory, an experimental investigation was carried out in situ on a demonstrative building. The hygrothermal performance of building is monitored for two consecutive years. The first analysis of the obtained data proved clearly that the earthen wall reduces the fluctuations of the outside temperature.

5. Conclusion

The dynamic thermal characterization of unfired clay bricks showed that the optimum thickness of earthen wall is equal to 400 mm. It enables to achieve the optimum values of thermal inertia, with a significant impact on the damping factor and on the thermal lag. It ensures a reduction of the fluctuations of the outdoor temperature and a limitation of the risk of overheating the building. The demonstrative building enabled the study of unfired clay bricks under real life conditions and over time. The campaign of measurement tests performed on the two walls of this experimental building has confirmed the role of earthen materials in mitigating the fluctuations of outdoor temperatures. This experimental construction has received several visits intended to promote the earthen construction in northern France and initiate an integrative approach of active involvement of regional stakeholders. The laboratory scale and on-site tests have demonstrated the thermal performance of unfired clay bricks and their contribution in creating thermal comfort in buildings. Earthen construction has a promising future and is fully compatible with sustainable development aspirations. A correlation between the two test results at laboratory scale and in situ will be more developed, gradually with the results obtained of the building thermal performance.