Abstract
Final properties of unfired earth are influenced by composition of earth mixtures. Methylene blue test could be useful method for analysis of earth composition. This would facilitate of designing unfired earth building structures because composition of natural earth is various. Principle of methylene blue test is measure of amount of adsorbed methylene blue dye by clay. The essential component of earth mixtures is clay because clay fulfils a function of binder. Experimental measure of adsorption capacity of individual kind of clay is described in this paper. Adsorption capacity was investigated in montmorillonite, kaolinite, illite-kaolinite and illite clays. The obtained results show that the adsorption capacity of clays is significantly different.
Highlights
Unfired earth is a building material which had become minor in 2nd half of 20th century because of modern building materials such as steel or concrete have have become readily available
Basic idea of this research is that every kind of clay has different adsorption capacity of methylene blue dye
Methylene blue test is finished when a blue ring spreads around a drop sample (Fig. 3) because clay has already adsorbed the maximum amount of methylene blue dye
Summary
Unfired earth is a building material which had become minor in 2nd half of 20th century because of modern building materials such as steel or concrete have have become readily available. Earth mixture is a basic material for production of unfired earth constructions. Uncertain composition of natural earth is the main reason why using of unfired earth in construction is complicated. Methylene blue test could be a good method for analysis of the earth composition. Basic idea of this research is that every kind of clay (main component of earth mixture) has different adsorption capacity of methylene blue dye. If adsorption capacity of individual clay is known, this test could be a good method for analysing earth composition [5,6,7,8]. This paper is focused on experimental determination of adsorption capacity of clay by methylene blue test. The result of this research is the determination of the adsorption capacity of mentioned clay and determination of dependence between the amount of adsorbed dye and amount of clay in earth
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