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2 Journal of Ecological Engineering

2 2019

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The Effect of Using Naphthalene and Local Soil with Concrete Mixture on Thermal Conductivity, Case of Mafraq City – Jordan

Alzoubi Hussain H., Al-Olaimat Duha J.

Journal of Ecological Engineering

2019

Vol. 20, nr 4

42--53

This study explores the effect of direct incorporation of different ratios of naphthalene with soil into the concrete used in Mafraq-Jordan on the thermal conductivity of concrete mixtures. The methodology involved testing 72 concrete cube samples. The basic samples were prepared only from a mixture of water, silica sand, and cement without additives. The additives of local soil and naphthalene of different ratios: 2.5%, 5%, 7%, 10% and 15%, were added to the tested samples. The samples were classified into two groups in terms of size and dimensions; 36 cubes with 5×5×5 cm were tested only for thermal conductivity, and 36 cubes with 3×3×3 cm were tested for compressive strength and thermal conductivity. All samples were tested after 28 days of casting, according to the concrete standards. The results show that adding naphthalene and soil to the cementitious mixtures substantially decreases the thermal conductivity of concrete elements. A reasonable reduction in thermal conductivity was achieved compared with the basic case samples. However, the compressive strength of samples remained within the acceptable values from the stand point of structural engineering. This enhancement in the thermal properties of concrete can be applied in building systems as concrete blocks used in internal and external walls.

A Comparative Study for the Traditional and Modern Houses in Terms of Thermal Comfort and Energy Consumption in Umm Qais city, Jordan

Alzoubi Hussain H., Almalkawi Amal T.

Journal of Ecological Engineering

2019

Vol. 20, nr 5

14--22

This research presents a comparison study between the vernacular architecture represented by the heritage houses (Fallahy Houses) and the typical contemporary houses in Umm Qais city in the northern part of Jordan, in terms of thermal performance. It analyzes the parameters of the heritage houses to explore the impact on the human thermal comfort and energy consumption compared with the typical modern houses. The study investigates the performance of the vernacular houses and how they respond to the physical and climatic conditions. It also shows how these houses depend on passive design to control solar gains, and decrease heating and cooling loads keeping a good level of thermal comfort inside. The study compares these vernacular houses with the traditional contemporary house in Umm Qais. The selected samples from each type of houses were taken to evaluate the impact of the vernacular principles of design, building construction and materials on the thermal performance and the thermal comfort inside the houses. Computer simulation, accompanied with measuring tools and thermal cameras, was used for thermal analysis in the selected houses. Revit software was also used for this purpose to validate the results and compare it with the real field results. The results show that the passive design strategy in the vernacular houses is substantial and more effective than the techniques used in the modern houses.