
cbr standard value for crushed stone
•A CBR of 3 equates to tilled farmland, •A CBR of 4.75 equates to turf or moist clay, 220 psi = .22, or 22% •Moist sand may have a CBR of 10. 1000 psi •High quality crushed rock has a CBR over 80. 300 psi = .20, or 20% •The standard material for this test is crushed California 1500 psi limestone which has a value Contact Supplier
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