Mix Design It is a process of selecting suitable ingredients and determining their relative proportions with the objective of producing concrete of having certain minimum workability, strength and durability as economically as possible.
Requirements of concrete mix design
The requirements which form the basis of selection and proportioning of mix ingredients are :
1- The minimum compressive strength required from structural consideration
2- The adequate workability necessary for full compaction with the compacting equipment available.
3- Maximum water-cement ratio and/or maximum cement content to give adequate durability for the particular site conditions
4- Maximum cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.
