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S.L. Barbour J.V. Headley 1999 Diffusion and adsorption of benzene in Regina clay Can. Geotech. J./Rev. can. geotech
Abstract
Thermal degradation of granite and marble industry reject (GMIR), a red clay (RC)and their composites were studied by non-isothermal thermogravimetry (TG/DTG) in nitrogen atmosphere, differential thermal analysis (DTA) and derivative thermogravimetry(DTG) in air atmosphere. Measurements were made in the temperature range of 25–1000,25–1200 and 25–1400C. The kinetic parameters were determined by Flynn–Wall and Kissinger's methods. The results indicate the absent dominance of one mechanism of reaction, and the composites show smaller values of kinetic parameters than GMIR or RC.
Abstract
This research was aimed to investigate the role of clay on the combustion and kinetic behavior of crude oils in limestone matrix. For this purpose, simultaneous TG (thermogravimetry) and DTA (differential thermal analysis) experiments were performed at three different heating rates as 10–15 and 20C min–1, respectively. A uniform trend of decreasing activation energies was observed with the addition of clay. It was concluded that clays surface area affects the values of Arrhenius constant, while it is the catalytic properties of clay, which lower the activation energies of all the reactions, involved in the combustion process.
deterioration of this kind of stone has been reported [ 4 – 7 ]. One of the main weathering processes is the dissolution of feldspars and volcanic glass and the formation of secondary clay minerals such as halloysite, smectite, illite, allophane, and kaolinite
. Pécsi, M. 1985: The Neogene red clays of the Carpathian Basin. - Studies in Geogr. in Hung., 19, pp. 89-98, Akad. Kiadó, Budapest. The Neogene red clays of the Carpathian Basin Studies in Geogr. in
References 1. Lambert J-F , Bergaya F : Smectite-polymer nanocomposites . In. Handbook of clay science , Eds: Bergaya F , Lagaly G
). P Görög 2007 Engineering geologic properties of the Oligocene Kiscell Clay Central European Geology, Acta Geologica Hungarica 50 4
to produce concrete with sustainable curing technique in which the potential cracking would be substantially reduced. Graded Clay Brick Waste (CBW) was employed as internal curing agent as alternative martial with 10% and 15% volumetric percentage
Committee 1980: - Clays and Clay Minerals, 28/1, pp. 73-78. Summary of Recommendations of AIPEA Nomenclature Committee Clays and Clay Minerals 28
155 (The Kiscell Clay).
