Concrete Creep Shrinkage: ACI_209#shrinkage_strain#40pct#3000psi#I
Concrete creep and shrinkage parameters per ACI 209R-92 and fib Model Code 2010 — creep coefficients and shrinkage strains at varying humidity, V/S ratio, loading age, concrete strength, and cement type
| model param rh | vs loading key | cement type | concrete strength psi (psi) | correction factor humidity (dimensionless) | correction factor member size (dimensionless) | model | notes | parameter type | relative humidity pct (percent) | shrinkage strain microstrain (microstrain) | ultimate shrinkage microstrain (microstrain) | volume to surface ratio in (inch) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ACI_209#shrinkage_strain#40pct#3000psi#I | 1in#na | I | 3,000 | 1 | 0.98 | ACI_209 | V/S=1 in (25.4 mm): gamma_sh_vs=1.2*exp(-0.00472*25.4)=1.069; eps_sh=780*1.0*1.069 | shrinkage_strain | 40 | 712 | 780 | 1 |
| ACI_209#shrinkage_strain#40pct#3000psi#I | 2in#na | I | 3,000 | 1 | 0.93 | ACI_209 | V/S=2 in (50.8 mm): gamma_sh_vs=1.2*exp(-0.00472*50.8)=0.940 | shrinkage_strain | 40 | 680 | 780 | 2 |
| ACI_209#shrinkage_strain#40pct#3000psi#I | 3in#na | I | 3,000 | 1 | 0.9 | ACI_209 | Moist-cured; RH correction for shrinkage: if h<=0.80: gamma_sh_lambda=1.40-1.0*h=1.40-0.40=1.00; V/S correction: gamma_sh_vs=1.2*exp(-0.00472*V/S_mm) | shrinkage_strain | 40 | 650 | 780 | 3 |
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