Mix Design
Nominal Mix
// Definition
A pre-defined volumetric proportioning of cement, sand, and aggregate (e.g., 1:2:4 for M15) used for small-scale work without formal mix design.
Permitted only up to M20 per IS 456. Less reliable than design mixes — strengths vary with material quality. RMC is always design mix.
// Related Indian Standards
IS 456
// Cross-references
Mix Design
The process of selecting cement, water, aggregates, and admixtures in correct proportions to produce concrete that meets strength, workability, and durability requirements.
Design Mix
A concrete mix proportioned through laboratory testing to achieve a specified characteristic strength with statistically defined safety margin.
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