What Is The Difference Between Nominal Mix And Design Mix?
Nominal Mix 1- When the concrete is produced by taking standard arbitrary proportions of concrete ingredients, it is known as nominal mix concrete. 2- The nominal mix is a mix considering all ratio in the volume where Strength and cost of concrete and strength of concrete varies. 3- It is Prescriptive type concrete. 4- It is used in ordinary concrete involving concrete grade not higher than M20. 5- There is no quality control. 6- Water cement ratio is based on durability criteria, experience and practical trials. 7- Water content can be modified by slump value (field-based test) 8- No entrapped air content is considered. 9. Trial mixes concept is mentioned. Design Mix 1-lt can be defined as the process of selecting suitable ingredients of concrete and determining their relative proportions with the object of producing concrete of certain minimum strength and durability as economically as possible. 2- Design mix is a mix considering all ratio