GUIDES
Concrete Mix Design Guides
Practical guides to concrete grades, mixes and durability, grounded in IS 10262:2019, IS 456:2000 and IS 383. Each guide links through to the calculator so you can apply what you read.
All guides
Concrete Grades ExplainedWhat M20, M25, M30 and M40 mean, and how fck is definedNominal Mix vs Design MixWhen IS 456 permits a nominal mix, and when a design mix is requiredDurability & Exposure ConditionsIS 456 exposure limits on grade, w/c and cement contentSlump & WorkabilityHow the slump test works and how to choose workabilityFly Ash & GGBSUsing supplementary cementitious materials in concreteCommon Mix Design MistakesPitfalls to avoid, from aggregate moisture to skipped trialsIS 10262: 2009 vs 2019What changed between the two editionsMaterial Cost CalculatorCost of concrete per m³ from your ratesCarbon Impact EstimatorEmbodied CO2e of concrete per m³
Suggested reading order
- Start with grades and exposure: read the concrete grades guide and the durability and exposure guide to decide the minimum grade, w/c and cement content for your element.
- Decide how the concrete will be specified: the nominal vs design mix guide explains when IS 456 allows nominal proportions and when a design mix is required.
- Choose the binder: the fly ash and GGBS guide covers PPC, PSC and site-blended mixes and their effect on curing and strength gain.
- Run the calculation in the IS 10262 calculator with your actual material properties.
- Confirm on site: the trial-mix, slump and common-mistakes guides explain how to turn the calculated mix into a reliable field mix.
Which standards the guides refer to
- IS 10262:2019 — concrete mix proportioning guidelines (the calculation method).
- IS 456:2000 — plain and reinforced concrete code of practice (durability limits, cover, nominal mixes, curing).
- IS 383:2016 — coarse and fine aggregates.
- IS 269, IS 1489, IS 455 — OPC, PPC and PSC cements.
- IS 516 and IS 1199 — testing of hardened and fresh concrete.
Always check the edition and amendments in force for your project.
Frequently asked questions
Are these guides a substitute for the standard?
No. These guides explain the concepts in plain language, but the current applicable BIS codes — IS 10262, IS 456, IS 383 and related standards — are always the reference for a real project.
Do I need to be an engineer to use them?
No. They are written to be useful to practising engineers as well as students and site staff who need a clear explanation of a term or a step.