Published Paper Details:

This experimental study shows how the strength of concrete changes when sand is replaced by crushed sand (CS) and quarry dust (QD) in 10% increments from 0% to 30%. M25 grades of concrete were studied with a constant slump of 60mm. The compressive strength of concrete cubes at the age of 7 and 28 days were obtained at room temperature. Also the temperature effect on concrete cubes at 100 degree C on 28th day of casting was carried out to check the loss of strength. From test results it was found that the maximum compressive strength is obtained only at 30% replacement at room temperature and net strength after loss due to hike in temperature was above the recommended strength value due to 30% replacement itself. This study clearly shows that quarry dust can be used in concrete mixtures as a good alternative for natural river sand, providing greater strength at 30% replacement. In an experimental research of the strength characteristics of concrete utilising crushed stone dust as fine aggregate, it was discovered that the compressive strength, flexural strength, and tensile strength of concrete increased. The current study demonstrates that the properties of mortars and concrete including crushed stone dust as fine aggregate are better to those of natural river sand as fine aggregate. The findings apply to the most often used grading zone - II sand. Crushed stone dust created from hard rock that falls within the grading Zone II sand, grading restrictions given by IS 383 code, is appropriate as fine aggregate in building mortars. Additionally, the IS-2116 and IS 383 regulations allow for the use of crushed stone fine aggregate in masonry mortars. This research discusses the effect of stone dust content in sand on mortar characteristics.