Clay soil modification with Ca²⁺ exchangeable cation

摘要

A method of reducing the swell potential of an expansive clay mineral. The method includes (a) carrying out a forcefield-modified molecular level simulation to determine an amount of a swelling reduction agent to be incorporated into the expansive clay mineral to form a swelling reduction agent incorporated expansive clay mineral with a reduced swell potential S_i(ECM) that is no greater than a pre-set level T, wherein the swelling reduction agent comprises at least one cementation material of calcite, gypsum, and potassium chloride and/or at least one exchangeable cation of K⁺, Ca²⁺, and Mg²⁺, and wherein the forcefield-modified molecular level simulation comprises molecular mechanics, molecular dynamics, and Monte Carlo simulation techniques configured to simulate the reduced swell potential S_i(ECM), and (b) incorporating the amount of the swelling reduction agent into the expansive clay mineral to form the swelling reduction agent incorporated expansive clay mineral.