A mix of concrete that is workable has less internal friction between its particles. This means that it is easier to compact the mix, overcoming the frictional resistance that it experiences. There are several factors that affect the workability of a concrete mix. These include the water content, the aggregates, the use of admixtures, and the fineness of the cement. These factors all contribute to the final strength of a mix.
The consistency of freshly mixed concrete is a measurement of its fluidity, ease of flow, and porosity. Although consistency is one dimension of workability, it does not necessarily reflect cohesion. Different mixes can have different workability properties. Some factors that affect consistency include the amount of cement and water content, the degree of plasticity in the cement paste, and the mode of compaction. A mix may need different characteristics to be more or less workable than another.
The proportion of coarse or large aggregates in a mix will affect the workability. The proportion of coarse or flaky aggregates will result in more segregation. The higher the proportion of coarse aggregates, the more water it will require to make it workable. A mix containing more small aggregates will be more workable, but this is a trade-off that can be made with care. But if you’re using this mix for a residential or commercial building, it’s best to use more water.