Friday, 20 June 2014

FIRE

Fire test
A brick which is used for construction should not flammable in open flame, so this test was carried out for the bricks. This test was carried out only for fibrous concrete bricks not for padobe brick. Because padobe brick was already heated in kiln at high temperature so, it won’t burn. The following are the steps involved in this test,
o   First, the brick was wiped with cloths and all the foreign matters were removed.
o   Then the flammable sticks were fired. After that, the bricks were held on the flame for five minutes.
o   After five minutes fixing was stopped and the bricks were observed.
          From the above test, it was observed that the fibrous concrete bricks did not burn with an open flame. They smoldered like charcoal. But these brick would be reduced to ashes after burning several hours. If the interior plaster and exterior stucco is provided on the fibrous concrete bricks, the bricks won’t burn. The only weak point is inside the block, near electrical outlets, switches and other places where wires gives through walls, into boxes etc.,. Properly wired places never cause fire. If we apply the plaster without any hole or leakage on the bricks, it won’t burn or smolder inside. Because there will be lack of oxygen for burning

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