In Beltrami County, they windrowed the top inch of aggregate on the side of the road, spread additional crusher dust at the center and bladed each side of the road twice to blend. The site had three 1/3-mile sections a control section that received 166 tons of Class 1 aggregate and test sections that received 50 or 83 tons of crusher dust derived A mix of crusher dust (10 shovels) brickys sand (4 shovels) and cement powder (2 shovels) is the customary slurry in which to lay the paving. ... How To Repair a Gravel Driveway With Crusher Run eHow. ... Allow an extra 5 cm of depth for a bed of crusher dust or road base under the slab. Read more. Sand Cement Floor Screeds - Afrisam.