Calculating Density of Concrete

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To calculate the density of a concrete cube, use the formula density equals mass divided by volume. Given the weight in air (2.345 kg) and the dimensions (height 1900 mm, width 320 mm, depth 180 mm), the volume can be calculated as 0.10976 m³. The density is then calculated as 2.345 kg divided by 0.10976 m³, resulting in approximately 21300 kg/m³. While specific gravity can be considered, it is not necessary for this calculation. Accurate unit conversion and attention to buoyant effects are advised, though they may not significantly impact the result.
SiCharlton
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Hi all,
My problem is concerning density and how to calculate it. Basically, calculating density of a concrete cube. I've been given;

Weight (kg) In Air - 2.345,2.340
In Water - 1.348, 1.360

Dimensions - Height - 1900mm
Width - 320mm
Depth - 180mm

I need to calculate the Density kg/m^3

Does it include the specific gravity etc..? I've searched google for ages but to no avail. Could it be, Weight in air/(weight in air - weight in water) to give S.G, thus 2.35...therefore a ratio 1:2.35 of water to cement. Taking density of water as 1000kg/m^3, density of concrete is 2350kg/m^3?

Any help will be really appreciated.

Thanks
Simon
 
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You seem to have been given rather too much information. If you have the dimensions and the weight in air then you have the density ( simply mass / volume )
Be carefull of the units.

If you wanted to be really picky you could include the bouyant effects of the air - although this wouldn't be worth it given the accuracy the dimensions are quoted to.
 

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