Cement mortar is a well-known partner of concrete hollow blocks (CHB) and other masonry blocks. It's what binds masonry blocks together. Cement mortar material quantity can be estimated in a variety of methods. One of the easiest ways to estimate cement mortar material quantity is by area method.
Concrete hollow blocks (CHB) vary in sizes. Local hardware stores usually have 3 commercially-available CHBs that vary in thickness – 4”(10cm), 6”(15cm) and 8”(20cm).
4”(10cm) thick CHBs are usually used for interior walls while 6”(15cm) and 8”(20cm) thick CHBs are usually used for exterior walls.
Same with concrete, mortar’s compressive strength depends on your material’s mixture and proportions. You should select your mortar mix class according to your desired mix strength.
Determine the area of your wall. The formula for a square wall is Length * Height.
Make sure to take into consideration the often-overlooked information that will affect the area of your wall – for example, the depth of your beam or the underground foundation CHB.
Compute for the quantity of cement and sand needed for a Class “B” mortar mix of a standard 4” CHB wall that is 3 meters high and 2 meters long.
Specified CHB thickness = 4”
Specified mortar mix = Class “B”
Square Wall Area = Length * Height
= 2m * 3m
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