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What is the bulk density of concrete?

about 2,400 kg per cubic meter

What is the mass of concrete?

A normal weight concrete weighs 2400 kg per cubic meter or 145 lbs per cubic foot (3915 lbs per cubic yard). The unit weight of concrete (density) varies depending on the amount and density of the aggregate, the amount of entrained air (and entrapped air), and the water and cement content.

What is the weight of 1 m3 concrete?


Does concrete find its own level?

The thick consistency of concrete mix means that it does not level itself. … If there is space between the 2-by-4 and the surface of the concrete, more concrete must be added. The goal is for the entire surface to end up flush with the bottom of the two-by-four when laid across the form boards in any area of the slab.

What do you put down before pouring concrete?

Tip. To shore up the subsurface, sprinkle a thin layer of cement sand onto the gravel and dampen it with water. Do not leave any standing water and allow the dampened sand to dry for about an hour before pouring the concrete. Ground preparation is key to pouring sidewalk, driveway or any other concrete slab.

What’s the best base for concrete?

The base course material, according to ACI 302, “Concrete Floor and Slab Construction,” should be “compactible, easy to trim, granular fill that will remain stable and support construction traffic.” ACI 302 recommends material with 10 to 30% fines (passing the No. 100 sieve) with no clay, silt, or organic materials.

How thin can you pour concrete over concrete?

about 2 to 2 ½ inches