Understanding Rock And Gravel Grades And Uses Mdi Rock
Crushed rock that’s smaller than 1/4 inch can be used to improve traction on icy surfaces and to fill in the spaces between larger stones. crushed rock comes in different grades depending on the percentage of “fines” in the mix. fines are any bits of rock smaller than the size indicated. so for 3/4-inch rock, for instance, fines would mean anything less than 3/4 inch all the way down to dust. grades of material..Crushed stone #67 – sizes from 3/4″ down to fine particles. for fill, road and slab base. crushed stone #1 – sizes are from 2″ to 4″. the largest of the crushed stone grades. for larger jobs such a culvert ballast. crushed stone #8 – sizes from 3/8″ to 1/2″. for concrete and asphalt mix. crushed stone #3 -sizes from 1/2″ to.