To explore the development law of the strength of lime-treated expansive soil and red clay

the unconfined compression

consolidated quick direct shear tests and consolidation test are carried out to compare the Nanyang expansive soil and Chenzhou red clay modified by quicklime and hydrated lime respectively. The study found that during the one-year curing period of lime-treated Nanyang expansive soil and Chenzhou red clay

the unconfined compression strength is linear with the logarithm of curing age. The strength of the samples with moisture content larger than optimum moisture content for 3% after 28 days curing is higher than that of the optimum moisture content samples. In addition

the modification effect of quicklime is better than the effect of hydrated lime. Due to the different mineral composition

the modification effect of lime-treated Nanyang expansive soil is better than that of Chenzhou red clay.