led Content Calculation for Concrete • Postconsumer Preconsumer Components Weight (Ibs) % Weight (Ibs) % Weight (Ibs) Cement 282 10% 28 Fly Ash 282 100% 282 Water 275 Slag 750 100% 750 Recycled Concrete Aggregate 1000 100% 1000 Sand 1200 Sample Totals 3.789 1000 1060 Postc