What Is Concrete Mix Ratio? In the process of making concrete is crucial to select the correct concrete mixing ratios to make the most durable, long-lasting and durable concrete mix. To make concrete, you need four fundamental ingredients: cement, sand, water, aggregate and mix-ins. The mixture's ratio the aggregate to sand is a significant aspect in determining the strength of the compressive capacity of concrete mix. This concrete mix proportion of 1 part cement, 1 part sand, and three components aggregate can make a concrete mixture of around 2500-3000 psi. Mixing water with the cement, sand, and aggregate will produce an emulsion that will hold the components until the mixture hardens. The strength properties of concrete are proportional to the ratio of water-cement. The basic concept is that the greater the amount of water you put in to mix this concrete, the weaker the mix of concrete. The less water you utilize to mix the concrete, the greater the strength of the mixin