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THE IMPACT OF LABORATORY AIR TEMPERATURE AND RELATIVE HUMIDITY ON BENTONITE WATER ABSORPTION CAPACITY
Helena Strgar
Dubravko Domitrović
Biljana Kovačević Zelić
Sažetak
Bentonite, which is a mineral component of geosynthetic clay liners,
has important physical and chemical properties that ensure very
small hydraulic permeability. The main component of bentonite is a clay
mineral called sodium montmorillonite whose very low permeability
is due to its ability to swell. The deposits of bentonite are spread all
over the world, however, only a very small number of those deposits
satisfies all the quality and durability demands that must be met if the
bentonite is to be used in the sealing barriers. Depending on the location
of installation and their purpose, geosynthetic clay liners must meet
certain requirements. Their compatibility with the prescribed criterion
is confirmed through various laboratory procedures. Amongst them are
tests examining the index indicators (free swell index, fluid loss index,
and water absorption capacity). This paper presents results regarding the
impact of laboratory air temperature and relative humidity of the testing
area on the water absorption capacity. This is one of the criteria that
bentonite must satisfy during the quality and durability control of the
mineral component of geosynthetic clay liner.
Ključne riječi
bentonite; geosynthetic clay liner; free swell index; fluid loss; water absorption capacity; permeability; chemical composition
Hrčak ID:
75129
URI
Datum izdavanja:
4.12.2011.
Posjeta: 2.629 *