Stabilization of Expansive Soils Using Cement-Zeolite Mixtures: Experimental Study and Lasso Modeling.

The free swell index emerges as a highly significant predictor (β = −2.4083, p = 0.002), confirming its importance as a mediating variable.

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The main effect of cement content (β = 1.8738, p = 0.141) and the interaction term (β = 0.1313, p = 0.343) did not reach statistical significance at the conventional α = 0.05 level.

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