Effect of silica fume and superplasticizer on the grout material of fully-grouted rockbolts

This study is related with the factors that effect the load capacity of fully grouted rockbolts. For this aim, bolts were embedded into bazalt blocks. Relationship between grout material ? compressive and shear strength and curing time were investigated in the laboratory. A grout material concrete showed the highest compressive that including %8 silica fume. Water ? binder ratio was 0,40 amount of grout mixture displayed the lowest bolt load strength. Other mixtures showed same strength for 28 curing time.Current investigation showed how bolt capacity, bonded capacity in mixtures having different properties connected curing time. Also showed how effect of addition cilica fume and plasticizer on fully grouted rockbolts.