Trade Journals for the Concrete Industry

Returned concrete is the unused ready-mixed concrete that comes back to the plant in the concrete truck as excess material. Typically, the amount of waste concrete generated by ready-mixed deliveries can be as low as 0.4% to 0.5% of total production. However, during peak periods, when pressure for supply is greatest, the waste can increase to 5% to 9%. Considering that the estimated global concrete production is roughly 25 billion tonnes, over 125 million tonnes of returned concrete are globally generated every year. These data confirm that returned concrete is a heavy burden for the ready-mixed plants and sums to the other C&DW.