blockvideos shows how to build a cinderblock compost bin for recycling needs. The builder will need 20 corner blocks, 36 AB York blocks, 12 AB Dublin blocks, 17 wall caps, 5 fifty pound bags of crushed rock, and and 2 tubes of masonry adhesive. To begin, find a location to build the compost bin and lay out the first layer of back wall and side wall blocks, lining them up straight. Check the dimensions of the layout. Once confirmed accurate, use a shovel to mark the grass around the blocks. Remove the blocks and dig out the grass 7" wide and 3" deep. Make level and fill with the crushed rock to the top to form the foundation. Level the area with a hand compactor. Replace the blocks over the foundation starting with the back wall, leveling them with a dead-blow hammer. Check the dimensions of the first layer of blocks. Start the next layer with a corner block, then use half an AB York block to start the back wall, and follow with an AB Dublin block. Place all the blocks according to the layout pattern. Place wall caps over the final layer of blocks. Once they are in place, remove and replace each cap with masonry adhesive. After letting the adhesive dry, drill holes and attach the compost cover.