Dry weight of sand mortar

Mortar is heterogeneous mixture of cement sand and water. Water reacts chemically with cement ingredients resulting in hydration of cement and fills the voids between cement and sand. As water is added to dry cement sand mixture the volume reduced. For quantity estimate of cement sand mortar the wet mortar’s volume should be increased to account for Water required for hydration. Water required filling of voids. Dry weight of mortar = Wet weight of mortar * 1.33

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Number of bricks required in 1m3 of wall

Standard size of brick = 240mm*115mm*57mm as per NBC Assume the size of mortar as 10mm Size of brick with mortar = 250mm*125*67mm Volume of 1 brick = (240*115*57)/10003=1.573*10-3 m3 Volume of 1 brick with mortar= (250*125*67)/10003=2.093*10-3 m3 Volume of mortar = 2.093*10-3-1.573*10-3 m3=5.2*10-4 m3 No of bricks required in 1m3 wall without mortar= 1/1.573*10-3 =635.72 numbers No of bricks required in 1m3 wall with mortar = 1/2.093*10-3 =477.78 numbers Assume 10% wastage , No of bricks for 1m3 wall

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