The invention relates to well graded or all-in-aggregate prepared from crushing of blast furnace slag of steel industries; Slag dust produced after crushing of blast furnace slag; concrete composition comprising cement, all·in-aggregate, slag dust and mortar composition comprising cement, fine aggregate named as slag dust produced after crushing of blast furnace slag obtained from the iron manufacture industries. The replacement of blast furnace slag as coarse and fine aggregate increases strength by 10 to 15 percent.
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