Experimental analysis and modeling of the thermal conductivities for a novel building material providing environmental transformation

ABSTRACT

In this study, a mathematical equation was developed to determine the thermal conductivity of the materials by producing porous heterogeneous materials with expanded vermiculite aggregates, waste basalt powder, and the mixture of molten tragacanth added building materials. Experimental thermal conductivity of the samples was determined by using the hot wire method. Experimental thermal conductivity of the samples produced varied between 0.196 W/mK and 0.522 W/mK depending on the expanded vermiculite ratio, the ratio of waste basalt powder, and the ratios of tragacanth and cement. In addition, the developed mathematical thermal conductivity ranges from 0.201 W/mK to 0.455 W/mK. The experimental values deviated from the values in the developed model in the range of 3–19%. This equation was developed based on the porosity ratio of the produced samples, the density and thermal conductivity of the materials in the samples. The thermal conductivity results obtained by the experimental and theoretically developed equation were compared with each other and it was observed that the results were compatible.

KEYWORDS:

• Thermal conductivity
• modeling
• porous heterogeneous material
• expanded vermiculite
• waste basalt powder
• tragacanth

Nomenclature

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Additional information

Notes on contributors

Fatih Koçyiğit

Fatih Koçyiğit, born 1977, received his Msc and PhD at the Unıversity of Firat, Elazığ, Turkey, in 2008 and 2012, respectively, while working in the institute of science and technology, mechanical education department. At present, he is employed at the University of Dicle. His fields of interests include materials science, energy, build materials.

Fatih Ünal

Fatih Ünal, born 1981, received his Msc and PhD at the Unıversity of Yildiz Thechnical, İstanbul, Turkey, in 2010 and 2014, respectively, while working in the institute of science and technology, mechanical education department. At present, he is employed at the University of Mardin Artuklu. His fields of interests include thermodynamic, energy, solar energy, heat transfer.

Şermin Koçyiğit

Şermin Koçyiğit, born 1978, received her Msc and PhD at the Unıversity of Firat, Elazığ, Turkey, in 2004 and 2016, respectively, while working in the institute of science and technology, building education department. At present, she is employed at the University of Dicle. Her fields of interests include materials science, hydraulic, build materials.