Experimental study on compressive performance of steel fiber self-compacting concrete

Self-compacting concrete;  steel fiber;  Compressive properties

Through the compressive test of the cube test block, the effects of steel fiber volume rate, steel fiber type, pouring method and fly ash replacement rate on the compressive strength of self-compacting concrete were studied. The results show that the steel fiber improves the compressive strength of self-compacting concrete. Within a certain range of steel fiber volume ratio, vibration improves the strengthening effect of steel fiber on the compressive strength of self-compacting concrete. The compressive strength of self-compacting concrete decreases with the increase of fly ash replacement rate, and gradually increases with the increase of age. On the basis of experimental research, a calculation formula for the cubic compressive strength of self-compacting concrete with fly ash replacement rate of 20% and 30% with age is given.