Comparative Analysis Of Compressive Strength In Concrete Cylinders And Cubes

Abstract

Concrete's compressive strength is vital for assessing its ability to withstand loads. This study compares the compressive strength of concrete using cube and cylindrical specimens to understand the reasons for observed variations. Specimens were prepared with a target strength of 30 MPa at 28 days, using Ordinary Portland Cement (OPC), river sand, and crushed granite. Cube (100 mm x 100 mm) and cylinder (100 mm x 200 mm) specimens were cured for 7, 14, and 28 days, and tested for compressive strength. The strength variation is due to differences in specimen geometry, stress distribution, and failure modes. Cubes experience uniform stress distribution, while cylinders show concentrated stress at the ends, leading to lower strength.This study concludes that cubes provide higher compressive strength than cylinders, with implications for concrete testing standards and quality control. Further research on concrete grade, specimen size, and curing methods is recommended.