Air has a higher specific heat capacity (at 1.0035 J/(g*K)) than concrete (.880 J/(g*K)).
Specific heat capacity is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by unit degree (Wikipedia). Because air requires more joules of energy per gram to raise it one degree Kelvin than concrete does, it is therefore a better insulator.
Reinforced concrete is just normal concrete with steel reinforement placed inside.
Normal Concrete refers to the fresh concrete which haven't yet cured providing that there was no add mixtures/any accelerators being infused upon mixing fine aggregates, gravel and cement plus water.
Normal Weight Concrete at 150 pcf has an R value of 1.22 per inch thickness
it has more cement than the normal mix
Concrete cracks. You can do everything right and use the best materials, it will still have hairline cracks. It's normal.
Rubber is an insulator for normal voltages.
chalk is an insulator because heat does not flow through it as easily.
Reinforced concrete is just normal concrete with steel reinforement placed inside.
Normal houses of bricks, concrete, wood etc.
Because saltwater has a higher density. It's like if you were to try to float a rock in water and then in wet concrete, it will stay afloat on the concrete because it is more dense.
I took an art course using concrete and it was normal everyday concrete. We were making stepping stones.
Normal Concrete refers to the fresh concrete which haven't yet cured providing that there was no add mixtures/any accelerators being infused upon mixing fine aggregates, gravel and cement plus water.
8"X16"
Normal Weight Concrete at 150 pcf has an R value of 1.22 per inch thickness
In general, foam is a better insulator than metal, and so foam would be expected to keep water hotter longer under most normal circumstances.
it has more cement than the normal mix
Concrete cracks. You can do everything right and use the best materials, it will still have hairline cracks. It's normal.