Mechanical Characteristics of Hardened Concrete with Different Types of Cement and Aggregate Available in Bangladesh

<div>This paper presents the results of an investigation into the influence of aggregate and binding material type on the mechanical properties of hardened concrete. To perform this investigation, four different types of coarse aggregate (Brick Aggregate, Recycled Brick Aggregate, Black Stone and Shingles) and eight types of binding material have been used. Aggregates were collected and prepared according to the grading requirements of ASTM C33-03. Several tests, such as specific gravity, absorption capacity, unit weight and abrasion resistance were performed for coarse aggregate. Cylindrical concrete specimens were made with different W/C ratios and cement contents. A total of 42 different cases were considered for testing. The specimens were tested for UPV, compressive strength, stress-strain curve and Young's modulus at the age of 28 days. The major objective of this study was to investigate the mechanical characteristics of concrete for different types of aggregate and binding materials. From the study it was found that, UPV of concrete specimens made with brick aggregate and recycled brick aggregate found lower than that of made with shingles and black stone. Black stone gave the best combination of high Young’s modulus as well as high compressive strength to the concrete in comparison to others. Shingles gave the best combination of high UPV as well as high compressive strength to the concrete in comparison to others. Young’s modulus and compressive strength of concrete increased with a decrease in the w/c ratio for any type of aggregate and increased with an increase in cement content.</div>