Non-destructive test analysis for silica fume and iron dust added concrete

Abstract

Damage to the structure may be prevented by using Non-destructive techniques. Non-destructive tests (NDT) play a crucial role in exploring the performance of concrete without damaging the actual structure. In this research work, the concrete quality is determined using the Schmidt rebound hammer test and the Ultrasonic Pulse Velocity (UPV) test. Seven different concrete series were prepared by varying the percentage of silica fume and iron dust. Silica fume was used as a partial replacement of cement and iron dust was used to replace fine aggregate partially. Percentage of silica fume (SF) and Iron dust (ID) utilized were 0 to 15% and 0 to 30% respectively. Ratio of iron dust and silica fume was kept constant as 2 in all series. The dosage of super plasticizer was adjusted to meet the slump requirement. Different series were tested for curing age of 28, 56 and 84 days. The best results of rebound hammer and UPV is obtained at 10% cement and 20% fine aggregate replace with silica fume and iron dust respectively. Optimum mix have 18%, 23.5% and 27.3% greater compressive strength value as compared to control mix for 28 days, 56 days and 84 days respectively.