Thermo-physical characteristics of acrylic-based building external isolation panels produced from different geological materials


Here we describe a new type of environmentally sensitive insulation panels which can be used on exteri-or wall surfaces to minimize all the negative aspects of existing coating materials by taking advantage of natural rock properties. We investigate the decorative characteristics and insulation performance of this new product, obtained by applying materials from different lithologies to Expanded Polystyrene Surfaces (EPS). First, a mortar with 25% acrylic and 75% sand was applied to the EPS by a stripping method using sand size materials from various lithologies (granite, micaschist, basalt, quartzite, and pumice). To determine the optimum thickness, insulation panels containing plaster of 2, 4, 6, and 8 mm thickness were prepared for each lithology. Their thermal conductivity coefficient, bending and compressive strength were tested. Predictably, thermal conductivity coefficient yielded lowest values in 2 mm panels and highest in 8 mm panels for all lithologies. The bending strength also increased proportionaly with thickness. In the compressive strength tests, the highest values were measured for the 2 mm panels while relatively low values were obtained for the 4, 6 and 8 mm panels, except for the micaschist and basalt-based panels. As a result, basalt and pumice offer superior features in the three measured parameters, so, it is expected that different combinations of these two lithologies would offer positive features. In this context, considering its high fire resistance and low thermal conductivity coefficient perpendicular to the planar surface of muscovites, micaschist is the third lithology that can be utilized with the two materials mentioned above. Compared with previous materials, the products investigated in this study are cost effective because they reduce paint costs, application time and total building load. The geomaterials also have aesthetic appeal.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • Al-Homoud, D.M.S., 2005. Performance characteristics and practical applications of common building thermal insulation materials. Building andEnvironment40(3),353-366.

  • ASTM C 518, Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus. Annual Book of ASTM Standards.

  • Cabeza, L. F., Castell, A., Medrano, M., Martorell, I., Pérez, G., Fernández, I., 2010. Experimental study on the performance of insulation materials in mediterranean construction. Energy and Buildings, 42(5), 630-636.

  • Celik, S., Family, R., Menguc, M.P., 2016. Analysis of perlite and pumice based building insulation materials. Journal of Building Engineering, 6, 105-111.

  • Demirboğa, R., Gül, R., 2003. The effects of expanded perlite aggregate, silica füme and fly ash on the thermal conductivity of lightweight concrete. Cement and Concrete Research, 33(5), 723-727.

  • Demirboga, R., 2003. Influence of mineral admixtures on thermal conductivity and compressive strength of mortar. Energy and buildings, 35(2), 189-192.

  • Dombayci, A., 2007. The environmental impact of optimum insulation thickness for external walls of buildings. Building and Environment 42(11), 3855-3859.

  • Ekici, B. B., Gulten, A.A., Aksoy, U.T., 2012. A study on the optimum insulation thicknesses of various types of external walls with respect to different materials, fuels and climate zones in Turkey. Applied Energy, 92, 211-217.

  • Gül, R., Uysal, H., Demirboğa, R., 1997. Investigation of the thermal conductivity of lightweight concrete made with Kocapınar’s pumice aggregate, In Advanced in Civil Eng., III. Technical Congress, 2, 553-562.

  • Hanu, L., Simon, G., Cheng, Y.B., 2006. Thermal stability and flammability of silicone polymer composites. Polymer Degradation and Stability, 91(6), 1373-1379.

  • ISO 8301, Thermal Insulation, Determination of Steady-state Thermal Resistance and Related Properties. Heat Flow Meter Apparatus, ISO, Geneva, Switzerland.

  • Jelle, B.P., 2011. Traditional, state-of-the-art and future thermal building insulation materials and solutions-properties, requirements and possibilities. Energy and Buildings, 43(10), 2549-2563.

  • Karataş, M.Z., Rızaoğlu, T, 2017. Technical characteristics of building isolation plates produced from natural materials such as:perlite,pumice, micaschist and arenitized granite. Romanian Journal of Materials, 47(2), 244-251.

  • Kaynaklı, O., 2012. A review of the economical and optimum thermal insulation thickness for building applications. Renewable and Sustainable Energy Reviews, 16(1), 415-425.

  • Korjenic, A., Petránek, V., Zach, J., Hroudová, J., 2011. Development and performance evaluation of natural thermal-insulation materials composed of renewable resources. Energy and Buildings, 43(9), 2518-2523.

  • Onésippe, C., Passe-Coutrin, N., Toro, F., Delvasto, S., Bilba, K., Arsène, M.A., 2010. Sugar cane bagasse fibres reinforced cement composites: thermal considerations: Composites Part A. Applied Science and Manufacturing, 41(4), 549-556.

  • Özel, M., 2011. Thermal performance and optimum insulation thickness of building walls with different structure materials. Applied Thermal Engineering, 31(17-18), 3854-3863.

  • Papadopoulos, A.M., 2005. State of the art in thermal insulation materials and aims for future developments. Energy and Buildings, 37(1) 77-86.

  • Reis, J., 2006. Fracture and flexural characterization of natural fiber-reinforced polymer concrete. Construction and Building Materials, 20(9), 673-678.

  • Rızaoğlu, T., Parlak, O., İşler, F., 2005. Esence granitoyidinin (Göksun-Kahramanmaras) jeokimyası, GD Türkiye. Yerbilimleri Dergisi, 26(1), 1-13.

  • Tasdemir, C., 2003. Istanbul’daki yapılarda korozyon sorunları. Yapı Yalıtım Teknolojileri Dergisi, 44, 40-42.

  • TS825-Binalarda Isı Yalıtım Kuralları, Institute of Turkish Standards, Ankara, Turkey, 1998.

  • Uysal, H., Demirboğa, R., Şahin, R., Gül, R., 2004. The effects of different cement dosages, slumps, and pumice aggregate ratios on the thermal conductivity and density of concrete. Cement and concrete research, 34(5), 845-848.

  • Zhou, X. Y., Zheng, F., Li, H. G., Lu, C. L., 2010. An environment-friendly thermal insulation material from cotton stalk fibers. Energy and Buildings, 42 (7), 1070-1074.


Journal + Issues