Concrete and Mortar Guide Mix Ratios, Curing Times and More
Sep 01, 2018· For example, a simple sand and cement mix should be at least 3 part sand (the aggregate) to one part cement. A strong concrete mix would be something like 1:3:5 (Cement, Sand, Coarse Gravel). In this case, both the sand and gravel are the aggregate. In premix concrete, the aggregate is already mixed with the cement.