The R-value of concrete is relatively low, typically around 0.08 to 0.10 per inch of thickness. For 120 mm (approximately 4.7 inches) of concrete, the R-value would be around 0.38 to 0.47. This indicates that while concrete provides some insulation, it is not highly effective compared to materials specifically designed for thermal insulation.
120mm = 0.00012km
To visualize 120mm, you can think of it as being slightly less than 5 inches, as 120mm is equivalent to about 4.72 inches. A common object that is approximately 120mm long is a standard credit card, which measures about 85.6mm by 53.98mm. You could also use a ruler to measure out 120mm to get a precise idea of its length.
The R-value of a Superior Wall typically ranges from R-11 to R-20, depending on the specific product and insulation used. Superior Walls are precast concrete foundation systems that incorporate rigid foam insulation to enhance energy efficiency. The exact R-value can vary based on the thickness of the insulation and the specific design of the wall system. Always check the manufacturer's specifications for precise values.
4.72440945
3588 centimetere
Normal Weight Concrete at 150 pcf has an R value of 1.22 per inch thickness
fiberglass
Fiberglass Insulation, R Value of 3.14. Pine board has an R Value of 1.74
Poured concrete has an R value of about 0.08/inch. Fiberglass batt has an R value of about 3.14/inch (blown fiberglass wall insulation is about 3.2/inch). From these values we can calculate that the equivalent insulating thickness of concrete would be about 3.5x3.14/0.08 = 137.4 inches. Note that concrete blocks have a somewhat better insulating value due to the incorporated air pockets. A 4" concrete block has an R value of about 0.2/inch An 8" concrete block has an R value of about 0.15/inch A 12" concrete block has an R value of about 0.1/inch
That is depending on your KL/r value . sammy Structural engineer That is depending on your KL/r value . sammy Structural engineer
M25 = 80 to 110mm in slab & beam M30 = 80 to 120mm in column
120mm = 0.00012km
Yes. Don't know for sure but its pretty low. however note that R value depends on the thickness. You double the thickness you double the R value.
The R value of a material is the thermal resistance of the material, so is dependent on the material's thickness. R is also the inverse of a material's thermal conductivity U. To work it out you need the k value ( the thermal conductivity) of the material and the thickness, then R=thickness/k. The k value for structural concrete (of density 2300kg/m3) is 1.6 W/mK (Units: Watts / (metre x degrees Kelvin) so for a thickness 100mm (0.1m) of this concrete, R=0.06 m2°C/W. Note that the R value in imperial units will not be the same. Check the units for any R value of any material that is given.
The best insulation for concrete basement walls is rigid foam insulation. It provides high R-value, moisture resistance, and is easy to install.
what is the slump value for M20 concrete
To visualize 120mm, you can think of it as being slightly less than 5 inches, as 120mm is equivalent to about 4.72 inches. A common object that is approximately 120mm long is a standard credit card, which measures about 85.6mm by 53.98mm. You could also use a ruler to measure out 120mm to get a precise idea of its length.