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# What-is-the-1.54-Constant-for-Concrete-in-Quantity-Survey

## What is 1.54 Constant for Concrete in Quantity Survey?

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For example
We need to calculate dry mortar for 1cum concrete

We have 1m x 1m x 1m = 1 cum (cubic meter)

1 cum is wet volume
Now we need to convert 1 cum wet volume into 1cum dry volume

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3. ### How do you take off a Staircase

Dry volume = wet volume + 54% of wet volume

So
Dry volume = 1 + ((55/100) x 1)
Dry volume = 1 + (.54 x 1)
Dry volume = 1 + .54
Dry volume = 1.54 cum
when you need to calculate
Dry volume of concrete than just multiply wet volume with 1.54 to calculate dry morter

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