Materials / Compare

Concrete vs. Wood

Compare Concrete vs. Wood strength, stiffness, weight and thermal properties.

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ConcreteCast
WoodNatural
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Mechanical
Yield strengthnot sourcednot given (tensile used)
Ultimate tensile strengthnot sourced99MPasourcemodulus of rupture (no direct tensile value)
Compressive strength27.6MPasourcespecified compressive strength class (f'c), not a measured typical46.6MPasourcecompression parallel to grain (maximum crushing strength), 12% MC
Flexural strengthnot sourced99MPasourcemodulus of rupture (static bending), 12% MC
Elongation at breaknot sourcednot sourced
Young's modulus (stiffness)not sourced12.5GPasourcebending MOE, parallel to grain
Density2,240–2,400kg/m³sourcerange for normalweight concretenot sourced
Strength to weightnot sourcednot sourced
Stiffness to weightnot sourcednot sourced
Poisson's ratio0.15–0.2sourcegeneral range at normal ambient conditions (overall 0.11-0.32)0.35sourcemu_LR (red oak group, ~12% MC)
Shear modulusnot sourced4.63GPa
Bulk modulusnot sourced13.9GPa
Speed of soundnot sourcednot sourced
Thermal
Thermal conductivity0.9W/m·Ksourcetypical (comparative value)0.18W/m·Ksourceacross grain, 12% MC (Table 4-7, approximate)
Thermal expansion8–12µm/m·Ksourcetypical range for portland cement concrete (aggregate dependent)3.1–4.5µm/m·Ksourceparallel to grain, ovendry wood, range across species
100 mm part over a 50 °C swing50µm growth19µm growth2.63x less
Specific heat900J/kg·Ksourcetypical (NIST guidance for thermal analysis)1,700J/kg·Ksourcesolid wood (all species), 12% MC, 27 C
Heats up and cools (diffusivity)0.431mm²/snot sourced
Thermal shock resistancenot sourced244W/m
Max service temperature65°Csourcecode long-term temperature limit (ASME Code, concrete containments)not sourced
Values forNormal-weight portland cement concrete, strength class f'c = 4000 psi (28 MPa) per NRMCA CIP 35; density NRMCA CIP 36; thermal conductivity USDA FPL Wood Handbook; service temperature ORNL/NRC reviewNorthern red oak (Quercus rubra), clear straight-grained specimens at 12% MC, parallel to grain unless stated; USDA FPL Wood Handbook FPL-GTR-282 (2021) Ch. 4 and Ch. 5

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Which conducts heat better, Concrete or Wood?

Concrete conducts heat better: 0.9 W/m·K against 0.18 W/m·K for Wood.

Which expands less with temperature?

Wood expands less: 3.8 µm/m·K against 10 µm/m·K for Concrete.

Among 59 materials

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Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrick
Strength against density

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