By adopting an innovative and practical bio-enzyme-based soil improved technology, the physical property, characteristic of swelling-shrinkage and strength of Louyi Highway roadbed expansive soil are studied. As suggested by the experimental results, the liquid limit, plastic limit, and plasticity index of bio-enzyme-optimized expansive soil are subtly reduced. Meanwhile, its swelling indices, including free swelling rate, swelling rate under 0 and 50 kPa, drop significantly. Bio-enzyme-treated expansion soil technology to promote the shear str...
