Correlation between rebound hammer number and mechanical properties of steel fibre reinforced pavement quality concrete

The experimental investigation was conducted to assess the impact of steel fibre reinforced granite powder blended pavement quality concrete (PQC) with reference to destructive and non-destructive tests of concrete. M35 grade of concrete was used in this study. The quantity of granite powder (GP) mixed in this concrete was fixed as 10% from the results obtained in an earlier studies. In order to improve the performance of PQC, the steel fibre was added in the concrete at 0.25, 0.5, 0.75, 1.0, 1.25 and 1.5% by volume of concrete. The performance of hardened concrete was examined in terms of compressive strength, rebound hammer test and flexural strength. The substitution of granite powder improves the strength performance of concrete marginally. The results showed that the addition of steel fibre causes the reduction of slump value but improve the mechanical properties up to 1.1% addition of fibres in concrete. The correlation between rebound hammer number and compressive strength / flexural strength of granite powder blended PQC was developed. (C) 2020 The Authors. Published by Elsevier Ltd.

Automated summary

The study evaluates the performance of steel fibre reinforced granite powder blended pavement quality concrete, and finds that the substitution of granite powder and addition of steel fibre have certain effects on the concrete performance, with a moderate improvement in mechanical properties with appropriate fibre addition.