Triaxial Test Research about Reshape Laterite Strength

The law of stress and deformation about laterite was researched by triaxial test under different compaction degree,the Duncan-Chang model parameters of laterite with the different compaction degree was obtained.The results showed that the cohesion,internal friction angle of laterite,the tangent elastic modulus and bulk modulus were increased with the increasing of compaction degree.The sample with low initial compaction degree presented the behavior from shear contraction to shear dilatancy.The sample with high initial compaction degree presented shear dilatancy behavior under only low confining pressure and shear contraction behavior under high confining pressure.The parameters derived from the test could provide reference for design and calculation of projects in laterite regions.