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In areas that have a limited clay source, bentonite can be mixed with certain soils and compacted into place, forming a free-swelling water barrier.
I work with a low-fire clay body consisting of ball clay, talc and bentonite .
Three types of soils, residual soils, kaolinite and bentonite , were used in the study.
Sedimentary rocks such as mudstones often contain a variety of clay minerals, including swelling clays such as bentonite .
Like most clays, bentonite is a hydrated compound of aluminium and silicon oxides, but it differs in ways that are useful to wine-makers.
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