Correlation of Compressive Strength of Concrete with Aggregate Impact and Crushing Values of Coarse Aggregates

This paper will explore the influence of the Aggregate Impact Value and Aggregate Crushing Value of coarse aggregates on the compressive strength of concrete, specifically the use of basalt, granite, and marble aggregates. This research would provide insights into the impact of the mechanical properties of different aggregates on concrete. Cement, fine aggregates, and coarse aggregates were analysed in the laboratory by determining specific gravity, water absorption, and crushing strength. Cubes of concrete were cast in mix proportions in accordance with IS 10262 and subjected to a compressive strength test after 3, 7, and 28 days. The outcome revealed that basalt, which has a low crushing and Aggregate Impact, had a better compressive strength than both granite and marble. The results indicate that the materials with low crushing and Aggregate Impact can possess high compressive strengths, and thus this latter characteristic is important in the design of concrete mix. To strengthen these findings, statistical analyses were performed comparing ANOVA, regression analysis, and Pearson correlation. These confirmed that the type of aggregate played a significant role in compressive strength, with there being strong negative correlations (r =-0.93) between the Impact of Crushing of Aggregates and strength, and the regression models gave usable predictive equations of the strength at 7 and 28 days. The study also examines how the specific gravity of aggregates relates to their aggregate crushing value, giving an overall idea of how these attributes impact the performance of concrete. The data of the averaged compressive strength values showed that basalt recorded the highest values, followed by granite and marble, which illustrates the potential benefits associated with using basalt to make concrete. The results identify the necessity to pay attention to the aggregate properties in the course of design mix to increase structural integrity and performance. This study helps to optimize concrete mix designs, providing useful information about the impact of aggregate qualities, and accordingly, directly develops high-quality and strong concrete.