The influence of water cement ratio and sand ratio on the compressive strength of ceramic aggregate concrete at room temperature

This research explores the influence of water-cement and sand-aggregate ratios on ceramic aggregate concrete's compressive strength at ambient temperature. By fabricating nine specimens with distinct mix proportions, the study explored the influence of cement content varying from 16.6% to 17.5%. The specimens were subjected to compressive strength tests at 3, 7, and 28 days, and the interrelationships between the water-to-cement ratio, sand-to-aggregate ratio, and the 28-day compressive strength were scrutinised using grey relational analysis. The results indicate that the sand-to-aggregate ratio profoundly affects the 28-day compressive strength of ceramic aggregate concrete across various mix ratios, with a grey correlation degree of 0.7645, underscoring its significance as a pivotal parameter. The water-to-cement ratio also played a role in the experiment, albeit with a lower grey correlation degree of 0.5811, suggesting that it should not be overlooked.