FIELD: building. SUBSTANCE: for determination of optimum moisture content Wo in clayey grounds the samples of clayey soil having the thickness not more than 2 m are moistened to flow of ground followed by determining the plasticity index Jp of a soil sample which is then compressed under load Po the value of which are estimated according to formula Po=0.13+13.57/Jp = 0.13+Wo. Residual moisture content of a soil sample is determined after compression of it. EFFECT: increased accuracy. 1 cl, 1 tbl
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