November 17, 2017
This week’s video shows the processing plant and classifying tank at Martin Marietta Materials‘ New Harvey Sand near Des Moines, Iowa. The processing plant separates the rock from the sand. The rock goes through a screen that separates it into different sizes for stockpiling. The classifying tank separates the sand into concrete/asphalt sand and fill sand, then sends them in different directions to dewatering screws and on to stockpiles for loadout.