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BRICK FOUNDATION IN MUD MORTAR
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System Components
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Initial Cost Structure
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Local
Economy component = 27%
Foundation in mud mortar of 450 x 450mm over 600 x 600 mm footing in class II bricks
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DESIGN EXAMPLE : Foundation for a single storey Building
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Maximum width required = 2 x width of the wall + 0. 3m
(Assuming 23cm thick brick wall)= 2 x 0.23 + 0.3 m. = 0.76m.
Minimum depth required =
Assuming P
Safe permissible pressure on base) = 125 KN/sqm
W (weight of soil) = 18 KN/sqm
Angle of repose of the soil = 30 = 125/18x0.111 = 0.77m.
Assuming bearing capacity of soil = 200 Km/sqm
Width required = 125/200 = 0.625m
Thus provide a foundation width = 76cm and depth 77cm
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Critical Factors
· Quality of Soil
· Width and Stepping of Foundation
· Breaking of vertical joints
· Protection from water
· Availability and Cost of Bricks
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Tools Used
· Trowels
· Plumb bob
· Thread
· Pans
· Shovel
· Pick axes
· Baskets
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DO’S
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DON’T’S
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· Soil should have medium Plasticity
· Vertical Masonry joints should be properly broken
· Masonry should be stepped after one day’s Construction
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· Excessively sandy and clayey soil should not be used for masonry mortar
· Height of Masonry construction should not be more than 1m per day
· Masonry should not be allowed to dry out quickly
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