Mechanical Behavior of Hydrated-Lime–Liquid-Stabilizer-Treated Granular Lateritic Soils

Granular lateritic soil is commonly used for road construction in humid tropical and subtropical regions. However, the high plastic clay content poor particle distribution of some laterite materials make them unsuitable bases subbases. Lime treatment a widely method improving problematic soil, liquid ionic stabilizers are considered an environmentally friendly solution reinforcing such soils. using only lime or may not be optimal. This study investigated effect treating granular with hydrated new stabilizer, Zhonglu-2A (ZL-2A). A series indoor tests, including compaction, California bearing ratio, unconfined compressive strength were conducted to evaluate effects stabilizer on mechanical properties, mineralogical composition, microstructure soil. The results show that increase dosage increases optimal moisture decreases maximum dry density. CBR lime-stabilizer-treated was at least 2–3 times higher than only-lime-treated highest observed samples treated 0.2‰ ZL-2A stabilizer. sample 6% exhibited strength, nearly linear between CBR. Further investigation stabilization mechanism X-ray diffraction mineralogy analysis scanning electron microscopy revealed inorganic substances provided basic conditions reaction generated cementitious hydrates particles. mixture wrapped by forming complex spatial structure To improve capacity subgrades actual subgrade engineering, combination should treat laterite.