Patent ID: 9670409
Date: 2017-06-06
CPC Classifications: A01G,B09C,C04B,C09K,E02D

Claim:
1. A method of reducing the swell potential of an expansive clayey soil comprising at least one expansive clay mineral, the proportion of the weight of the at least one expansive clay mineral relative to the total weight of the expansive clayey soil being P ECM , the expansive clayey soil having a water content and a cation exchange capacity (CEC) expressed in meq/100 g dry expansive clayey soil, the method comprising: (a) calculating a first amount of a swelling reduction agent to be incorporated into the expansive clayey soil to form a first swelling reduction agent incorporated expansive clayey soil with a reduced swell potential S wherein the first swelling reduction agent incorporated expansive clayey soil comprises a first swelling reduction agent incorporated at least one expansive clay mineral having a swell potential represented by S wherein the swelling reduction agent is at least one selected from the group consisting of calcite, gypsum, potassium chloride, a composition comprising exchangeable K wherein the incorporation of the first amount of the swelling reduction agent produces a modified total cohesive energy density (TCEDm) of the first swelling reduction agent incorporated at least one expansive clay mineral calculated according to Equation (6): where TCEDm=modified TCED, C=Proportion of calcite weight relative to the total weight of the first swelling reduction agent incorporated expansive clayey soil×P wherein the TCEDm of the first swelling reduction agent incorporated at least one expansive clay mineral results in S where IDD is initial dry density of the first swelling reduction agent incorporated at least one expansive clay mineral, where FDD is final dry density of the first swelling reduction agent incorporated at least one expansive clay mineral when the first swelling reduction agent incorporated at least one expansive clay mineral reaches the swell potential S wherein the reduced swell potential of the first swelling reduction agent incorporated expansive clayey soil S (b) incorporating the first amount of the swelling reduction agent into the expansive clayey soil to form the first swelling reduction agent incorporated expansive clayey soil.