ABSTRACT
In order to ameliorate the adverse effects of expansive soil on engineering, lignin and cement were used as modifiers to study the dynamic characteristics of modified expansive soil under different lignin content and moisture content based on resonance column test. The experimental results show that the dynamic shear modulus of modified expansive soil is larger than that of plain soil, and the damping ratio is smaller than that of plain soil. The dynamic shear modulus of modified soil reaches the maximum when 4% cement + 1% lignin is added. Under the same mixing content and confining pressure, the dynamic shear modulus and damping ratio of the improved soil decrease with the increase of moisture content.
