🔥 IS 10262:2019 · IS 456 Cl. 13.7 · ACI 207.1R · 2026

Mass Concrete Mix Design Calculator

IS 10262:2019 optimised mix design for mass concrete — raft foundations, pile caps, dams and thick walls. Includes thermal analysis, heat of hydration, temperature rise prediction, IS 456 temperature differential compliance, SCM optimisation and cooling strategy.

🔥 Heat of Hydration Analysis
⏱ Temperature Rise Prediction
✅ IS 456 Cl. 13.7 Compliance
🌿 SCM Heat Reduction
❄️ Cooling Strategy Guide

▶▶ Run Complete Mass Concrete Mix Design + Thermal Analysis

🔥Mass Concrete Design Parameters

IS 10262:2019 Cl. 4 + IS 456:2000 Cl. 13.7 — Stipulation of requirements for mass concrete elements

● Structural & Exposure Requirements

Concrete Grade
M20M25M30M35M40
IS 456 Exposure Class
Mild — max w/c 0.55Moderate — max w/c 0.50Severe — max w/c 0.45Very Severe — max w/c 0.45Extreme — max w/c 0.40
Element Type
Raft ≤ 500mm thickRaft 500mm–1500mmRaft > 1500mm (massive)Pile Cap (medium–large)Dam / Gravity BlockThick Wall > 500mm
Element Thickness (mm)

Governs adiabatic temperature rise fraction
Ambient Temperature (°C)

Peak daytime temperature at pour location
Concrete Placing Temp (°C)

IS 456 Cl. 13.7: max 40°C at placing
Standard Deviation Source
IS 10262 Table 1Actual (≥30 results)
Actual σ (MPa)

● Cement & SCM Selection

Primary Cement Type
OPC 53 Grade (IS 12269) — HIGH heatOPC 43 Grade (IS 8112) — MODERATE heatPPC — Fly Ash (IS 1489) — LOW heatPSC — GGBS (IS 455) — VERY LOW heatLow Heat OPC (IS 12600) — MINIMUM heat
SCM Added Separately (type)
None (binder = cement only)Fly Ash (k=0.25, IS 3812)GGBS (k=0.60, IS 16714)
SCM Addition (% of cement mass)

FA: max 35%; GGBS: max 65% for mass concrete
Superplasticiser
No SPPCE SP — 15% WRPCE SP — 20% WRPCE SP — 25% WR
Fly Ash (pre-blended in cement) (%, if PPC/PSC)

PPC typically 15–35% FA; PSC typically 25–70% GGBS
7-Day Heat of Hydration (J/g, auto)

PPC: 210–280 J/g — LOW heat

● Aggregate, Workability & Section Geometry

Max Aggregate Size (mm)
20 mm40 mm (mass concrete standard)80 mm (dam concrete)
Aggregate Type
Crushed (angular)Rounded (river gravel)
FA Grading Zone
Zone IZone IIZone III
Target Slump (mm)
25 mm (mass concrete, external vibration)50 mm (mass concrete, poker vibration)75 mm (standard)100 mm (pump delivery)
Pour Lift Height (mm)

Max lift height per layer for temperature control
Air Content (%)

Cooling Pipes Installed?
No cooling pipesYes — cooling pipes
Insulation on Surfaces?
None — exposed surfaceHessian / foam blanket (R≈0.5)Plywood + polystyrene (R≈1.5)

● Material Specific Gravities

Cement SG
Coarse Agg SG
Fine Agg SG
CA DRBD (kg/m³)
SCM SG (FA≈2.20, GGBS≈2.90)
Concrete Density (kg/m³)

✅ Mass Concrete Mix Design Complete — IS 10262:2019

Thermal analysis included ·
Cement—kg/m³
Water—L/m³
Fine Agg—kg/m³
Coarse Agg—kg/m³
SCM—kg/m³
w/c Ratio—adopted
Core Temp Rise—°C (predicted)
Δ T Core–Surface—°C (IS 456 max 20°C)
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📋 Copy Summary

1 Target Mean Strength

IS 10262:2019 Cl. 5.3.2 — fcr = fck + 1.65 × S
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fck—MPa
σ—MPa
Margin—MPa
TMS (fcr)—MPa

2 Water-Cement Ratio

IS 10262:2019 Cl. 5.6 — lower of strength-derived and IS 456 Table 5
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Strength w/c—
IS 456 Max w/c—
Adopted w/c—
Governs—

3 Water Content

IS 10262:2019 Table 2 — base value adjusted for MSA, slump, aggregate type and SP
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Table 2 Base—L/m³
SP Reduction—L/m³
Design Water—L/m³

4 Cement & Binder Content

IS 10262:2019 Cl. 5.5 — C = W / w/c; SCM addition and effective w/c calculation
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Cement Content—kg/m³
SCM Added—kg/m³
Total Binder—kg/m³
Effective w/c—
IS 456 Min—kg/m³
IS 456 Max450kg/m³

5 Aggregate Proportioning

IS 10262:2019 Table 3 — Absolute volume method; 40/80mm MSA for mass concrete
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jc Applied—
Coarse Agg—kg/m³
Fine Agg—kg/m³
Volume Balance—m³
Unit Weight—kg/m³

6 Mix Proportions Summary

Per m³ of concrete — SSD basis

Material	Quantity	Volume (m³/m³)	Ratio to Cement	Standard

7 Thermal Analysis — Heat of Hydration

IS 456:2000 Cl. 13.7 — Max placing temp 40°C · Max core–surface differential 20°C · ACI 207.1R method
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Temperature Profile

Placing Temp T₀—°C
Adiabatic Rise ΔT—°C (fully insulated)
Actual Rise (α×ΔT)—°C (α=thickness factor)
Predicted Core Temp—°C
Surface Temp—°C (ambient + insulation)
ΔT Core − Surface—°C
Placing Temp Check—IS 456 max 40°C
ΔT Differential Check—IS 456 max 20°C

8 Cement / SCM Heat Comparison

Predicted temperature differential for different binder systems at this mix design — select the lowest-heat option that satisfies ΔT ≤ 20°C
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9 Cooling Strategy & Thermal Control Measures

Recommended measures to achieve IS 456 Cl. 13.7 compliance for this pour

Measure	ΔT Reduction (°C)	Applicability	Cost Indicative	Status

10 Trial Mix & Compliance Checklist

IS 10262:2019 Cl. 9 — Trial batch 30 L minimum · IS 456:2000 compliance summary
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✅ IS 456:2000 Compliance Checklist — Mass Concrete

📄Mass Concrete Design Reference

IS 456:2000, IS 10262:2019 and ACI 207.1R requirements for mass concrete

📌 IS 456:2000 Cl. 13.7 — Temperature Limits for Mass Concrete

• Maximum placing temperature: 40°C at time of placing (IS 456 Cl. 13.7). Monitor with thermometer on each truck/batch.
• Maximum temperature differential: 20°C between core and surface during curing (IS 456 Cl. 13.7). Measured by embedded thermocouples.
• Mass concrete threshold: Elements where heat dissipation must be controlled — generally thickness > 500mm (IS 456 guidance) or where ΔT prediction exceeds 20°C with standard OPC 53.
• Cement choice: PPC (IS 1489), PSC (IS 455), or Low Heat OPC (IS 12600) strongly recommended for thickness > 500mm. OPC 53 alone is generally not suitable for > 800mm thickness without aggressive cooling.
• Lift height: Pour in lifts of 300–600mm maximum with adequate vibration overlap. Allow each lift to partially cool before placing next.
• Curing: Keep surfaces covered and moist. Insulate with hessian + polythene to slow surface cooling and reduce differential. Do NOT strip formwork early in mass pours.

⚠️ Thermal Monitoring is Mandatory for Elements > 800mm Thick: IS 456 requires that temperature be monitored during curing. Embed calibrated thermocouples at element core and surface. Record temperature every 2 hours for the first 72 hours. If ΔT approaches 18°C, increase insulation immediately or activate cooling pipes. Core temperature typically peaks at 18–36 hours after placing.