What is the Design Mix concrete
Determination of the proportions of cement, aggregates and water to achieve the required strengths in concrete is made by designing the concrete mix. Such a concrete is called as a 'Design Mix concrete'. Use of only the design mix concrete is recommended in the case of prestressed concrete construction. A maximum cement content of 530 kg/m3 is specified in the code so that shrinkage stains of concrete may be restricted within limits.