IS 10262:1982 is the Indian Standard (BIS) for concrete mix proportioning - guidelines. This standard provides guidelines for designing concrete mixes based on specified strength, durability, and workability requirements. It outlines a step-by-step procedure starting from calculating target strength to determining the proportions of cement, water, and aggregates, concluding with trial mixes to validate the design.
Provided guidelines for the proportioning of concrete mixes, including considerations for using admixtures.
Overview
- Status
- Superseded — superseded by IS 10262:2009
- Usage level
- Essential
- Domain
- Materials Science — Admixtures and Chemical Products for Concrete
- Type
- Guidelines
Also on InfraLens for IS 10262
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! This 1982 version is obsolete and has been superseded by IS 10262:2019. The new version is more comprehensive, including provisions for mineral and chemical admixtures and high-strength concrete.
! The accuracy of the mix design heavily depends on the precise determination of material properties like aggregate specific gravity, water absorption, and grading. These must be tested before starting the design process.
! The values in the tables (e.g., water content) are initial estimates. Trial mixes are mandatory to fine-tune the proportions to achieve the required workability and strength in real-world conditions.
Frequently referenced clauses
cementaggregateswateradmixtures
International Equivalents
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Key Values5
Quick Reference Values
Target mean strength statistical factor1.65
Assumed standard deviation for M20 concrete (Table 1)4.0 N/mm²
Estimated water content for 20mm aggregate (25-50mm slump)186 kg/m³
Approximate entrapped air for 20mm nominal max size aggregate2.0 %
Volume of coarse aggregate for 20mm aggregate in Zone II0.62 per unit vol of total aggregate
Key Formulas
f_target = fck + 1.65 * s — Target mean compressive strength
Tables & Referenced Sections
Key Tables
Table 1 - Assumed Standard Deviation
Table 2 - Maximum Water Content per Cubic Metre of Concrete for Nominal Maximum Size of Aggregate
Table 3 - Volume of Coarse Aggregate per Unit Volume of Total Aggregate
Key Clauses
Clause 3.2 - Target Mean Strength
Clause 3.3 - Selection of Water-Cement Ratio
Clause 3.4 - Selection of Water Content
Clause 3.6 - Estimation of Coarse and Fine Aggregate Proportions
Clause 4 - Trial Mixes
Frequently Asked Questions3
How is the target mean strength for a mix design calculated?+
It's calculated as: f_target = fck + 1.65 * s, where 'fck' is the characteristic strength and 's' is the standard deviation obtained from site data or assumed from Table 1 (Clause 3.2).
How is the initial water content estimated?+
The initial water content is estimated from Table 2 based on the nominal maximum size of aggregate and the required workability (e.g., slump range).
Is this code still in use?+
No, IS 10262:1982 has been withdrawn. It was first replaced by IS 10262:2009 and subsequently by the current version, IS 10262:2019. New designs must use the latest version.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.