Question:
What is the difference between the two forms of bentonite, do they both serve the same earthing applications?
Answer:
Bentonite moisture retaining clay is available in two forms, Granulated and Powder. Granular is the preferred option for filling trenches where the conductor is covered and then water poured over and mixed in the trench. The powder form of Bentonite, on the other hand, is the preferred method for pouring into bore holes to ensure the mixture is of a thin enough consistency to reach the bottom of the bore hole.
Over time both types would be washed through and potentially, to maintain the required resistivity reading, more product would need to be added in the future. An alternative to using bentonite as a ground enhancement material, is Marconite which offers a more permanent solution.
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