Dear researchers,
I am writing to ask you about your experiences when working with kaolin-bentonite mixtures in the laboratory. My idea is to perform some characterization and consolidation tests with different proportions of kaolin (85%, 90%, 95%) and bentonite (15%, 10%, 5%).
Sincerely,
Cristian Soriano
Both Bentonite and Kaolinite are layered clay's but Bentonite have two negative charged surfaces in each layer and Kaolinite have one positive surface in each layer therefore in a mixture of these clay's bentonite layer will attract two layers of kaolinite. Therefore I think that the different proportions of this mixture should be kaoline ( 60%, 70%, 80%) and bentonite (40%, 30%, 20%).
Bentonite is a highly expansive clay. A 15% bentonite (by dry weight kaolinite) application will result in a 'highly' expansive soil as per Seed et al. (1962) classification scheme. As a result, you might experience some difficulties in specimen preparation for consolidation tests. Does your characterization include swell test? I think you need to be more specific in your question. Again, there is inherent moisture in bentonite so you have to oven dry it before you determine the percentages. Good luck, Cristian.
I recommend you to use nano particles from both kaolinite and bentonite with your mixtures
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