Mechanical properties of micro silicon powder -rubber/cement mortar under dynamic and static loading

In order to study the mechanical properties of micro silicon powder (MP)-rubber/cement mortar, 16 sets of specimens were designed and analyzed by uniaxial compression test and impact test (SHPB) for peak stress, peak strain, modulus of elasticity, impact strength, damage morphology and stress-strain curves of the specimens with different micro silicon powder dosage, rubber particle sizes and curing ages. The uniaxial compressive test shows that the addition of rubber particles decreases the compressive strength and modulus of elasticity of mortar specimens and increases the peak strain at the same age of maintenance, and the strength and modulus of elasticity of the specimens recover after the addition of micro silica powder. The impact resistance test shows that: rubber will reduce the impact strength of mortar, but can improve the damage morphology of mortar, and micro silica powder not only enhances this improvement, but also improves the impact strength of rubber/cement mortar, in addition, after the addition of micro silica powder, the peak load of the stress-strain curve of the specimen will be shifted to the left due to the shortening of the elastic deformation and elasto-plastic deformation stages, but the damage stage is obviously prolonged.