Innovative use of brick powder and marble dust as a mineral admixture in concrete

The objective of this study is to analyze the effect of brick powder and marble dust used as admixtures on the properties of concrete. The various properties like consistency, specific gravity, setting time of cement and compressive strength are analyzed by varying the amount of brick powder and marble dust in concrete. The results showed that brick powder and marble dust helps in increasing the workability and strength of concrete if mixed in certain proportion. The mix prepared in this study is M-25. It is found that marble dust replaced between 5-7.5% increases the compressive strength but compressive strength is reduced if the amount of marble dust is extended beyond 10%. The results for the brick powder are more encouraging as compared to the marble dust. The addition of brick powder as admixture shows significant increase in 28 days compressive strength of concrete.