Here is another very useful video tutorial presented by Civil Engineers YouTube Channel about Grade of Concrete, Groups and Mix Ratio.

With the help of this video, you will learn more about grade of Concrete, groups and mix ratio.

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Factors influencing choice of mix design:

Grading of Combined Aggregates

The relative proportions of the fine and coarse aggregate in a concrete mix is one of the important factors affecting the strength of concrete.

For dense concrete, it is essential that the fine and coarse aggregate be well graded. In the case when the aggregate available from natural sources do not confirm to the specified grading, the proportioning of two or more aggregate become essential.

What are Concrete Mix Design:

Concrete mix design may be defines as the art of selecting suitable ingredients of concrete and determining their relative proportions with the object of producing concrete of certain minimum strength & durability as economically as possible.