Concrete Mix Design Cheat Sheets 2026 | IS 10262 Quick Reference — MixDesignCalc

📋 IS 10262:2019 · IS 456:2000 · PRINT-READY · 2026

Mix Design Cheat Sheets

Quick-reference cards for every key IS 10262 and IS 456 value — keep these on your desk, share with your team, or print for site use. Every critical number in one place.

📋 IS 10262 Nine Steps 🔢 IS 456 Table 5 💧 Water Content Table 2 🌿 SCM k-Factors 📊 QC Acceptance 💰 Cost Formulas

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Reference Cheat Sheets

10 quick-reference cards — all critical IS 10262:2019 and IS 456:2000 values in compact form

How to use these sheets: Each card contains one specific set of reference data. The orange formula boxes show exact IS 10262 equations. Blue rows are key values. Green rows indicate good/safe conditions. Red rows are limits or non-compliant conditions. Use Ctrl+P (or ⌘+P on Mac) to print — the cards will reformat to two columns for A4.

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IS 10262:2019 — Nine Steps

Complete mix design procedure at a glance

TMS: fcr = fck + 1.65 × S (S from IS 10262 Table 1)

w/c: From IS 10262 Fig.1 (OPC 53: w/c = (102−fcr)/116) then check IS 456 Table 5 max. Adopt lower value.

Water: Read IS 10262 Table 2 for MSA and slump. Adjust for agg type, zone, SP.

Cement: C = W ÷ w/c. Check IS 456 min/max (300–450 kg/m³).

SCM: Add FA, GGBS, SF. Check effective w/c = W ÷ (C + Σ k·SCM) ≤ IS 456 max.

CA: From IS 10262 Table 3. CA = jc × DRBD.

FA sand: V_FA = 1.000 − V_c − V_w − V_CA − V_SCM − V_air. FA = V_FA × SG_FA × 1000.

Moisture: Batch water = Design W − free moisture in FA − free moisture in CA.

Trial mixes: 3 batches min. Accept: 28d mean ≥ fcr AND slump ±25mm.

Volume check = 1.000 m³ IS 10262 Cl. 9 — mandatory trial

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IS 456 Table 5 — Durability Limits

Minimum requirements by exposure class

Exposure	Min Grade	Max w/c	Min C (kg/m³)	Cover* (mm)
Mild	M20	0.55	300	20–25
Moderate	M25	0.50	300	30
Severe	M30	0.45	320	45
V. Severe	M35	0.45	340	50
Extreme	M40	0.40	360	75

Max cement (IS 456 Cl. 8.2.4.2)450 kg/m³

SP mandatory when?M40 Extreme (C>450 without SP)

*Nominal cover to main reinforcement. Slab typically lower end; column higher end of IS 456 Table 16 range.

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IS 10262 Table 2 — Water Content

Litres per m³ · Crushed · Zone II · 27°C

MSA	25mm	50mm	75mm ⭐	100mm	125mm	150mm
10mm	208	212	220	228	234	242
20mm ⭐	175	180	186	194	200	208
40mm	159	163	168	175	180	188

Rounded aggregate adjustment−10 L/m³

M-Sand (moderate dust)+8 L/m³

PCE SP 20% WR× 0.80

FA Zone III (finer sand)+8 L/m³

Fly ash ball-bearing (25%)−6 L/m³ (approx)

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IS 10262 Table 3 — jc Values

Volume fraction of coarse aggregate · CA = jc × DRBD

MSA	Zone I	Zone II ⭐	Zone III	Zone IV
10mm (crushed)	0.54	0.52	0.50	0.48
20mm (crushed) ⭐	0.66	0.64	0.62	0.60
40mm (crushed)	0.74	0.72	0.70	0.68
10mm (rounded)	0.59	0.57	0.55	0.53
20mm (rounded)	0.71	0.69	0.67	0.65

Typical DRBD (crushed stone)1380–1550 kg/m³

Most common: 20mm, Zone II, crushedjc=0.64 → CA=928 kg/m³

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IS 10262 Table 1 — Standard Deviation

Assumed σ when production data unavailable

Grade Range	Assumed σ (MPa)	Margin = 1.65σ
M10 – M15	3.5	5.78 MPa
M20 – M25	4.0	6.60 MPa
M30 – M55	5.0	8.25 MPa
M60+ (init.)	6.0 (rec.)	9.90 MPa

TMS Formula

fcr = fck + 1.65 × S

M30 Example

fcr = 30 + 1.65×5.0 = 38.25 MPa

When you have ≥30 results

Use actual σ (not Table 1)

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SCM k-Factors (IS 10262 Cl. 5.7)

Effective w/c = W ÷ (OPC + Σ k·SCM)

SCM	k-Factor	SG	Max % of OPC	IS Standard
Fly Ash (FA)	0.25	2.20	35%	IS 3812
GGBS	0.60	2.90	50%	IS 16714
Silica Fume (SF)	2.50	2.20	12%	IS 15388
OPC (reference)	1.00	3.15	—	IS 12269

Effective w/c Formula

(w/c)_eff = W / (C + k_FA×FA + k_GGBS×GGBS + k_SF×SF)

SF Water Demand Increase

+2 L/m³ per 1% SF addition

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IS 10262 Figure 1 — w/c Equations

Linearised strength-w/c relationships by cement type

OPC 53 Grade (IS 12269)

w/c = (102 − fcr) / 116

OPC 43 Grade (IS 8112)

w/c = (90 − fcr) / 110

PPC (IS 1489)

w/c = (82 − fcr) / 108

Valid range only

M10 – M55 (fcr 16–64 MPa)

M30 OPC 53: fcr=38.25w/c=(102−38.25)/116=0.549

M30 OPC 43: fcr=38.25w/c=(90−38.25)/110=0.471

Above M55IS 10262 Annex C (not Fig.1)

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Absolute Volume Method

All volumes must sum to exactly 1.000 m³

Volume of each ingredient

V = Mass (kg) / (SG × 1000)

Fine aggregate volume (balance)

V_FA = 1.000 − V_C − V_W − V_CA − V_SCM − V_air

FA sand mass

FA_sand = V_FA × SG_FA × 1000

Material	Typical SG
OPC 53 cement	3.15
Fly ash (SCM)	2.20
GGBS (SCM)	2.90
Silica fume	2.20
Crushed granite/basalt CA	2.68
River sand / M-Sand FA	2.65
Air (assumed)	1.5% = 0.015 m³
Water	1.00

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SP Water Reduction — Quick Guide

IS 9103 Type F/G · Cement savings per WR%

SP Type	Typical WR%	Water (L/m³)	Cement saved (w/c=0.45)
No SP (base)	0%	186	—
NSF Type F	12–18%	153–164	49–74 kg/m³
PCE Type F	18–25%	140–153	74–102 kg/m³
PCE Type G	18–30%	130–153	74–124 kg/m³
PCE High-WR	28–38%	115–134	116–157 kg/m³

Water after SP

W_design = W_table2 × (1 − WR/100)

Cement saved per 1% extra WR (w/c=0.45)

ΔC ≈ 186×0.01/0.45 ≈ 4 kg/m³

SP mandatory at M40 Extreme (base water 186)

Without SP: C=186/0.40=465 > 450 kg/m³ ✗

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QC — IS 456 Cl. 15 Acceptance

Both criteria must pass simultaneously

When n < 15 results

Mean criterionf̄ ≥ fck + 3 MPa

Individual criterionEach fi ≥ fck − 3 MPa

When n ≥ 15 results

Mean criterionf̄ ≥ fck + 0.825 × σ

Individual criterionEach fi ≥ fck − 3 MPa (same)

Non-conforming actionIS 456 Cl. 16 — cores, NOT demolish

Min sampling (IS 456 Cl. 15.2)1 per 50 m³ (or part thereof)

Test result definitionAverage of 3 cubes (150mm, 28d)

One cube outlier ruleDiscard if >15% from avg of other two

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Moisture Correction (IS 10262 Annex A)

Applied every batch — without this, your w/c is wrong

Free moisture % = Total moisture % − Absorption %

Free% = Measured% − Abs%

Batch aggregate mass

Batch_FA = SSD_FA × (1 + Free%_FA/100) Batch_CA = SSD_CA × (1 + Free%_CA/100)

Batch water (reduce for aggregate moisture)

Batch_W = Design_W − (SSD_FA × Free%_FA/100) − (SSD_CA × Free%_CA/100)

Example (FA 4% total, 1% abs; CA 1.5% total, 0.5% abs)

Free_FA = 3%, Free_CA = 1% Batch_W = 186 − (877×0.03) − (928×0.01) = 186 − 26.3 − 9.3 = 150.4 L/m³

Test FA moisture every shift IS 2386 Part III

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Key Formulas — Quick Reference

Every critical IS 10262 equation on one card

Target Mean Strength

fcr = fck + 1.65 × S

w/c from strength (OPC 53)

w/c = (102 − fcr) / 116

Cement content

C = W / w/c

Coarse aggregate

CA = jc × DRBD

Volume of ingredient

V = Mass / (SG × 1000)

FA sand (balance)

V_FA = 1.000 − V_C − V_W − V_CA − 0.015

Effective w/c with SCM

(w/c)_eff = W / (C + k_FA×FA + k_SF×SF)

SP water reduction

W_new = W_old × (1 − WR%/100)

Characteristic str from data

fck_est = f̄ − 1.65 × σ_production

Cement saving from SP

ΔC = W_old × WR% / (100 × w/c)

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Aggregate Quality Limits

IS 2386 — minimum requirements by concrete grade

Test	M20–M30	M35–M45	M50–M55	M60+
LA Abrasion	≤ 30%	≤ 25%	≤ 22%	≤ 18%
ACV	≤ 30%	≤ 25%	≤ 22%	≤ 18%
SG (SSD)	≥ 2.60	≥ 2.65	≥ 2.68	≥ 2.70
Flakiness Index	≤ 35%	≤ 25%	≤ 20%	≤ 15%
Water Absorption	≤ 2.0%	≤ 1.5%	≤ 1.0%	≤ 0.8%

Best HSC rock typesBasalt > Granite > Quartzite

Never for HSC M45+Sandstone, shale, weak limestone

Rounded gravel max gradeM40 (jc reduction applies)

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Nominal Mix Ratios — IS 456 Table 9

Volume ratios · M5–M25 · Above M25: design mix only

Grade	C : FA : CA	Max w/c	Water / 50kg bag
M5	1 : 5 : 10	0.60	30 L
M7.5	1 : 4 : 8	0.60	30 L
M10	1 : 3 : 6	0.60	30 L
M15	1 : 2 : 4	0.60	30 L
M20 ⭐	1 : 1.5 : 3	0.55	27.5 L
M25	1 : 1 : 2	0.50	25 L
M30+	Design mix only	—	—

All ratios by volume (loose)Not by mass

Sand bulking error15–40% — weight batch for IS 10262

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Cost Quick Reference — 2026 India

Approximate market prices · Use for optimisation analysis

Material	Unit	Approx. Price	CO₂ (kg/kg)
OPC 53 Grade	₹/t	4,800–6,200	0.890
OPC 43 Grade	₹/t	4,500–5,800	0.890
PPC (blended)	₹/t	4,200–5,500	0.600
Fly Ash (SCM)	₹/t	600–1,000	0.014
GGBS	₹/t	2,200–3,400	0.068
Silica Fume	₹/t	15,000–22,000	0.014
NSF SP	₹/L	18–35	—
PCE SP	₹/L	55–100	~2.20
River sand	₹/t	1,100–2,200	0.005
M-Sand	₹/t	800–1,400	0.005
Crushed CA	₹/t	900–1,400	0.0065

CO₂ factors: ICE Database v3.0 (2023). Prices: 2026 India average — regional variation ±30%.

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IS 456 Nominal Cover — Table 16

Minimum cover to main reinforcement (mm)

Member	Mild	Moderate	Severe	V. Severe	Extreme
Slab	20	30	45	50	75
Beam	25	30	45	50	75
Column	25	40	45	50	75
Foundation	40	40	50	50	75
Retaining wall	25	30	45	50	75

Construction tolerance added+10 mm (nominal cover + 10mm = min cover)

Fire resistanceIS 456 Cl. 26.4.3 — check against exposure cover

Cover definitionTo outermost steel (including links/stirrups)

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