Calculating Concrete Materials for 1.68m³ Base

In summary, the task is to make a concrete base that is 1.68 metres cubed in total, with a ratio of 1 part cement to 2 parts sand and 3 parts gravel. The question is how much cement, gravel, and sand are needed in kilograms. To solve this, one would need to know the density and molecular weight of each component.
  • #1
matfive
2
0

Homework Statement


hello I have to make a concrete base in metres cubed total 1.68 metres cubed.
The ratio to concrete is 1 part cement to 2 parts sand and 3 parts gravel.
how much cement,gravel, and sand in kilograms?


Homework Equations



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The Attempt at a Solution


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  • #2
You need to find rough numbers for the density of sand, cement and gravel to do this problem.
 
  • #3
is it 1/6 times 1.68 metres for cement and how to convert it to kilograms.
 
  • #4
is it 1/6 times 1.68 metres for cement and how to convert it to kilograms.

Not necessarily. One part (molecule) of cement could take up twice the volume as 1 part (molecule) of sand. You need to know the molecular weight (kg / mol) by knowing the chemical composition as well as the density (in kg/m^3).
 
Last edited:

1. What materials do I need to calculate for a 1.68m³ concrete base?

To calculate the materials needed for a 1.68m³ concrete base, you will need to determine the amount of cement, sand, gravel, and water required.

2. How do I calculate the amount of cement needed for a 1.68m³ concrete base?

To calculate the amount of cement needed, you will need to determine the volume of the base by multiplying the length, width, and height measurements. Then, multiply the volume by the ratio of cement to total volume, which is typically 1:4 for a base. This will give you the amount of cement in cubic meters.

3. What is the formula for calculating the amount of sand and gravel for a 1.68m³ concrete base?

The formula for calculating the amount of sand and gravel is to multiply the volume of the base by the ratio of sand or gravel to total volume, which is usually 2:4 for sand and 3:4 for gravel. This will give you the amount of sand and gravel in cubic meters.

4. How much water is needed for a 1.68m³ concrete base?

The amount of water needed for a 1.68m³ concrete base will vary depending on the type and amount of cement used. Generally, the water to cement ratio is 0.5, meaning you will need half the volume of water as compared to cement. Therefore, for a 1.68m³ base, you will need around 0.84m³ of water.

5. Can I use pre-mix concrete for a 1.68m³ base?

Yes, you can use pre-mix concrete for a 1.68m³ base. However, you will still need to calculate the amount of pre-mix needed by using the ratios mentioned above. Keep in mind that pre-mix concrete may have a different ratio, so be sure to check the instructions on the packaging for accurate measurements.

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