The weight of the building materials/ cu ft. depends upon the density of that particular material.
1. Coarse aggregates:
The density of coarse aggregates used in the construction works mostly varies from 1550kg/cum. to 1850kg/cum.
Let us consider the average density of 1700kg/cum. for the calculation purpose.
As you know, 1 cum = 35.3147 cu ft.
and 1cum of aggregate weighs 1700kg.
So, 35.3147 cu ft. = 1700kg.
1 cu ft. = -------?
By cross multiplication,
The weight of 1 cu ft. of coarse aggregate
= [1700kg.÷ 35.3147]
= 48.14 kg.
2. Sand:
The density of sand used in the construction works mostly varies from 1450kg/cum. to 1800kg/cum.
Let us consider the average density of 1625kg/cum. for the calculation purpose.
As you know, 1 cum = 35.3147 cu ft.
and 1cum of sand weighs 1625kg.
So, 35.3147 cu ft. = 1625kg.
1 cu ft. = -------?
The weight of 1 cu ft. of sand
= [1625kg.÷ 35.3147]
= 46.01 kg.
Note:
What are the factors that affect the density of sand?
The density of sand depends upon
1. Type of sand material: If the sand particles are formed of heavier materials, the density of such sand is more.
2. Presence of water: Dry sand has less density & moist sand carries more density due to the presence of water in its voids.
3. Voids in the sand: Loosely filled sand weighs less when compared to packed sand.
So, to find the accurate weight/ cu ft., the best method is to find the density of sand & aggregates used in the construction works.
To go through the articles on Estimation & calculation in civil engineering, click here.
Thank you for going through these calculation steps❤. Have a good day 😄.
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