Concrete Shrinkage Strain Calculator

Estimate shrinkage strain in concrete using drying time, humidity, and mix design factors according to ACI 209R-92 and Eurocode 2 standards.

Concrete Age at Loading (days)

Age at Which Shrinkage is Calculated (days)

Ambient Relative Humidity (%)

Volume to Surface Ratio (mm)

Cement Content (kg/m³)

Water-Cement Ratio

Slump (mm)

Fine Aggregate Content (%)

Air Content (%)

Calculation Standard

Shrinkage Strain (×10⁻⁶)

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Shrinkage Strain Rate (×10⁻⁶/day)

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Time to 50% Shrinkage (days)

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Interpretation

Enter your concrete parameters and click calculate to see results.

About Concrete Shrinkage

Concrete shrinkage strain is the contraction of concrete due to moisture loss and chemical changes. This calculator estimates the total shrinkage strain based on mix design and environmental conditions.

Calculation Methods

ACI 209R-92: Empirical method based on extensive laboratory data considering time, humidity, and member size.

Eurocode 2: European standard method accounting for cement type, relative humidity, and notional size of member.

Factors Affecting Shrinkage

Water-cement ratio (higher = more shrinkage)
Cement content (higher = more shrinkage)
Relative humidity (lower = more shrinkage)
Member size (thinner sections shrink faster)
Curing conditions (poor curing increases shrinkage)