A ratio refers to the proportions of sand, cement, gravel, and water in your concrete mix. Getting the ratios correct is key to having batches of concrete that set appropriately. Mixing concrete ...

Specialty cement ... Portland cement. Instead, specialty concrete consists of specialty cement such as potassium silicate that is mixed with water, a coarse aggregate such as gravel or crushed stone, ...

Polymer concrete and ... materials such as Portland cement. Polymer concrete consists of polymer cement mixed with water, a coarse aggregate such as gravel or crushed stone, and a fine aggregate or ...