**Contents**show

Before going for the calculation process to find out the mortar quantity for brick wall. We must have to follow these steps carefully for the mixing process of mortar.

### How to mix cement mortar?

- The mix should be by volume.
- The quantity of water should be such that the mix can be easily spread over bricks or

applied on a vertical surface. - The mix should be as per the specifications.
- Mortar should be used within half an hour of its preparation.

**Now, lets come to the calculation process.**

We assume that the required mortar for the construction of 1 m³ and the class of brick is first class and brickwork using the ration of 1:4 cement, sand mortar.

## Calculation Procedure for finding mortar required for brick wall

**Brick Size:** An standard size of **230mm x 110mm x 55mm****Mortar Thickness:** Assume **10mm thickness of mortar** and add on standard dimensions of the brick i.e size of a brick with 10 mm mortar joint-240mmx120mmx65mm.**Estimate Brickwork (V): **Let’s assume V=1 m³

**To Calculate the Number of Bricks:**

**Number of bricks for 1m³ brickwork**

= Total brickwork volume / Volume of brick with mortar

=1/0.24×0.13×0.065

=1/0.0021

= 535 no.

**To Calculate the Total Volume of Brick** = Actual size of brick x Number of brick

= 230mm x 120mm x 55mm x 535

=0.23×0.12×0.055×535

=0.95 m³

Now, **Wet Volume of Mortar** = Total volume – the total volume of a brick

= 1-0.081=0.187 m³

*Usually, dry volume is 40-53% more than the wet volume so to calculate*

**Dry Volume of Mortar** = wet volume of mortar x 1.5

= 1.5 x 0.187

= 0.2805 m³

We can also find out the volume of sand and the number of cement bags used in the 1 m³ brickwork.

As we already mentioned above we take the 1:4 cement-sand ratio in mortar.

First add the ratio i.e 1+4 = 5

Now, divide by the added ration and multiply that ration with the portion.

Volume of cement = (total dry volume of mortar / 5) x portion of cement in cement-sand mortar

= 0.2805/5

= 0.0561 m³

= 0.0561/0.034

= 1.65 bags

For the volume of the sand = (total dry volume of mortar /5) x 4

=(0.2805/5) x 4 = 0.2244 m³

In this way, we can estimate the required mortar including the number of cement bags required and the volume of sand required for the specified mortar respectively.