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BASIC INDEX PROPERTIES OF CLAYS IN RELATION TO THE CONTENT OF DIATOMS
Abstract
Clay soils are generally considered to be one of the risk groups of soils due to their specific mechanical behavior in geotechnical practice. Geomechanical clay properties have been investigated depending on the content of diatoms [1]. In the framework of the research project of the Technology Agency of the Czech Republic TA 02011350 ?Investigation of properties of diatomaceous clays and methods for improving their structure", clay properties have been investigated depending on the content of diatoms. To investigate the effects of diatom microfossil content on the index properties of clay soils, measuring tests were performed on cohesive soils with different diatom microfossils content. The methods of the improvement of the structure and geomechanical properties will primarily serve for the purposes of improving the stability of slopes formed of diatom clays in the vicinity of ongoing and designed infrastructure constructions and transport constructions. Based on the observed nature of the soil?s behaviour, it was possible to design a simulation of the mixture?s behaviour for an established amount of diatoms in the mixture. The influence of diatoms on the basic index properties was discussed. Based on regression equations, it was also possible to derive basic index properties and the parameter for a mixture of certain properties (e.g. for a specified content of the diatoms)
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References4
Kraus I., Kužvart M.: Ložiska nerud, SNTL, Praha,1987, p. 232.
Aksakal E.L., Angin I., Oztas T.: Effects of diatomite on soil physical properties, CATENA, Elsevier, vol. 88/issue 1, pp 1-5, 2012.
Tanaka H., Local J.: A microstructural investigation of Osaka Bay clay: The impact of microfossils on its mechanical behavior, Canadian Geotechnical Journal, vol. 36/issue 3, pp 493-508, 1999.
Tanaka M., Tanaka H., Kamei T., Hayashi S.: Effects of Diatom Microfossil Contents on Engineering Properties of Soils, in Proceedings of the International Offshore and Polar Engineering Conference, 2003, pp 919-924.
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