Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2006.1322.1326KaramanSedatSirri SahinHikmet GunalIbrahim OrungSabit Ersahin6200666The objectives of this study were to utilize sunflower stalks and grinded pumice as components of composite materials and to evaluate mechanical and physical properties of composite materials composed of sunflower stalk and sunflower stalk plus grinded pumice. The experiment was conducted in two stages. In the first stage, varying rates of sunflower stalks were mixed with gypsum and in the second stage, varying rates of sunflower stalk and pumice were mixed with gypsum. Increasing the ratio of sunflower stalk added in gypsum gradually decreased the unit weight and increased thermal insulation capacity that could be described by a linear regression equation (R^{2} = 0.89 and R^{2} = 0.81). However, mechanical and bending resistances decreased and water absorption capacity increased that could be described by a second degree polynomial regression equation in the former case and linear regression equation in the later case (R^{2} = 0.94, R^{2} = 0.85 and R^{2} = 0.84). When used together with pumice, increasing rates of sunflower stalk affected thermal and physical properties of the final product differently compared to when used alone. Low unit weight and good heat insulation feature favored the use of final products.]]>Anonymous,1982Arikan, M. and K. Sobolev,2002Herhandez, O.F., M.R. Bollatti, M. Rio and B.P. Landa,1999Li., G., Y. Yu, Z. Zhao, J. Li and C. Li,2003Lindley, J.A. and J.H. Whitaker,1996Ragsdale, L.A. and E.A. Raynham,1972Savastano, Jr.H., P.G. Warden and R.S.P. Coutts,2001Uzer, F.,1996Uzun, S.,2001