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quantifying the influence of tree rootlets on clay foundations

quantifying the influence of tree rootlets on clay foundations
Posted by: brian griffiths (IP Logged)
Date: February 09, 2020 23:59

Here's a question.
We know that clay soils will expand and contract with wet and dry seasons. Also, we know that this volumeric change can be exasperated by the presence of mature trees.
Is there some formulaic measure regarding the amount of rootlets present in a sample?
For example; a percentage per unit volume.
Perhaps the sample volume should be, say, a 10cm cube (0.001m3) with regard to building foundations.
Would a 0.5% presence of rootlets (by volume) have negligible or no effect on the volumeric change experienced by the clay?
Would a 5% presence by significant?
Could a quantitative scale of risk be developed along these outlines?

Thank you.

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|  quantifying the influence of tree rootlets on clay foundations brian griffiths 09/02/2020 23:59

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