Building Materials
Excess of alumina in brick earth makes the brick

To crack and warp on drying
Impermeable
To lose cohesion
Brittle and weak

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Building Materials
A queen closer is a

Brick laid with its breadth parallel to the face or direction of wall
Brick with half the width at one end and full width at the other
Brick laid with its length parallel to the face or direction of wall
Brick having the same length and depth as the other bricks but half the breadth

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