### How to calculate the quantity of adhesives & AAC blocks required in AAC block wall works?

Let us consider an AAC block wall of size 3m. × 10m. × 0.2m.  as shown in the drawing.

Now, we will build this wall with an AAC block of size 200 mm × 200 mm × 600 mm as shown in the image below.

Generally, the AAC block wall is constructed with 3mm. to 4mm. thick adhesive joints. Let us consider 4mm. thickness for the calculation purpose.

Given data:

Length of the block wall = 10m.

Height of the block wall = 3m.

The thickness of the block wall = 0.2m.

AAC block size = 0.2m × 0.2m × 0.6m.

Adhesive joint thickness = 4mm = 0.004m.

To calculate the number of blocks required to build this wall, first, we will find out the volume of the wall and the volume of a single AAC block with or without adhesive.

The volume of the block wall

= Length × Height × Thickness

= 3m. × 10m. × 0.2m.

= 6 CUM.

Now, the volume of the AAC block

= length × height × thickness

= 600 mm × 200 mm × 200 mm

( By converting them into m.)

= 0.6m × 0.2m × 0.2m.

=0.024 CUM.

From the drawing given below, you can observe that the addition of the adhesive thickness comes on the 2 sides of every block. I have denoted them with the nos. 1, & 2.

So, the volume of the AAC block with adhesive

=  0.604m × 0.204m × 0.2m.

=0.02464 CUM.

1.  The number of AAC blocks required

= volume of the wall ÷ volume of the block with adhesive

= 6 CUM. ÷ 0.02464 CUM.

=243.50 nos.

The volume of adhesive required

= volume of the block wall - the volume of the total no. of AAC blocks

= [volume of the block wall - ( no. of blocks  × vol. of a single block.)]

= [6 CUM. - (243.5 nos. × 0.024 CUM.)]

=   [6 CUM. - 5.844 CUM.]

=0.156 CUM.

The 40 kg of adhesive bag covers 6 to 8 sqm. wall area in 4mm. joint thickness. This coverage area is considered for the 200mm. thick  AAC block wall.

Let us consider the average cover area of 7 sqm. for 1 adhesive bag.

The area of the block wall

= length × height

= 10m. × 3m.

= 30 sqm.

The no. of adhesive bags (40kg.) required

= [total area of block wall ÷ area covered by 1 bag]

= [30 sqm. ÷ 7 sqm.]

= 4.28 bags.

Let us now find out the materials required for 1 CUM. & 1 cu ft. of an AAC block wall.

1.  AAC blocks:

Blocks required for 1 CUM. of AAC block wall

For 6 CUM of block wall       👉 243.5 nos. of AAC block.

So, for 1 CUM of block wall  👉 _ nos. of AAC block?.

=[ 1 CUM × 243.5 nos. ÷ 6 CUM.]

40.58 nos.

Blocks required for 1 cu ft. of wall

= 40.58 nos. ÷ 35.315

( As 1CUM = 35.315 cu ft.)

1.149 nos.

2.  Adhesive:

Adhesive required for 1 CUM. of AAC block wall

=[ 1 CUM × 4.28 bags. ÷ 6 CUM.]

0.713 bags

Adhesive required for 1 cu ft. of block wall

= [0.713 bags ÷ 35.315]

0.021 bags.

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