Effectiveness of Using Slag as Coarse Aggregate and Study of its Impact on Mechanical Properties of Concrete

Abstract

Traditional coarse materials like stone chips, brick chips are very costly. Httge amottnt of stone chips are being withdrawn regularly .from difJbrent sotrrces. As a result one day the amount of stone chips will be gradually ./inished possessing Ll great threat to the concrete construction sector. lndustries which use ferroalloys, .fabriccttes a large amount o.f slag as by product every- year. This iron slag deals with third class hazardous waste categoty that requires a large place.for dtrmping. Solid waste slag is transformable into resources Jbr sustainable construction w-orks which is also enyironment friendly. Perk of using low iron ,slag as coarse aggregate hqs immense e.//bct on both envirorunent and economy. By this means environmental polltttion due to the waste slag can be minimized significantly and also there will be a solution offilling the paucity oJ'nartu'al aggregate in the construction industrl;. In this paper we observed the strength properties of slag incorporuted concrete with di/ferent mix ratio. The proportion oJ'stone chips and slag used in this investigalion (ls coarse aggregctte are 100:0,90:10,80;20,70;30,60:40, 50:50,40.60, 30:70, 20:80, l0:90 and 0:100. Atotal of 396 specintens (4*4*4 cube) w*ere castu.singplainwater in norntal environmental teruperature and keptfor the periods of 7 days, 14 days, 2B days and 6 months respectively dtte to au.ing purposes. WC ratios were yaried as 0.60, 0.50 and 0.42 /br making 20MPa, 30MPa and 40MPa concrete respectivelv and compressiye as well qs tensile strength were evaluated a/ier specific exposure periods. The strength restrlts o/'the specimen provide some important informcttion regarding strength development ofslag-aggregate concrete as computed as conventional concrete.