Abstract Early-age cement paste or mortar can be enhanced by curing it in a CO 2 chamber. The study was initiated with investigation on the optimum compressive strength replacing to carbide lime 0, 5, 10, 15 and 20% of Carbide Lime Waste (CLW) content. desired CLW at 28 normal age selected similar mix proportion again casted fresh cured for 1,3 7 days under controlled curing. concentration temp...