FAQ Bagged Concrete, Mortar and Cement Mix
The two most prevalent concrete mixes are "standard" strength Concrete Mix (also known as "Gravel Mix") which contain stone, coarse sand and Portland cement. These mixes are supposed to reach 3500 psi at 28 days when used correctly. "High Early" or "High Strength" are often used for mixes that are designed to meet 5000 psi.