foundation system of burj al arab

Storage of Cement

Storage of cement is a noteworthy item, because proper arrangements for storing the cement have to be made in the factories before sale or on large construction projects before use. Proper Storage preserves its quality and fitness for use. To prevent its deterioration it is necessary to protect it from rain, sun, winds and moisture.

Moisture is the first and the greatest danger to be gaurded against. Cement has great affinity for moisture and hence it should be stored well shieled from moisture laden current of air. The exposed cement is attracted by air setting which gradually spreads. It gives to the formation of lumps. If the lumps fromed are so hard that they can not be powered by passing between the fingers, it should be concluded that the cement has been rendered useless for any sound construction.

Cement should be stored in dry, leakproof and moisture proof sheds. The shed for the storage of cement should have minimum number of windows and close fitting doors. The cement bags should be stacked on wooden planks placed about 150 to 200 mm above the floor of the shed and a space of 450 to 600 mm should be kept allround between the exterior walls and the stacks.
To prevent possibilities of lumping under pressure, the maximum height of stack should not exceed 15 bags. The width of stacks should not be more than four bags or 3 m. In stacks more than 8 bags high, the cement bags should be arranged alternatively lengthwise and cross-wise so as to ensure stability of the stacks and to prevent danger of the bags in stack topping over.
In monsoon or in situations when it is necessary to store cement for unusually long periods, the cement stacks should be completely enclosed by 700 gauge polyethene sheet or some other water-proofing membrane materials.
The stack should be arranged in such a manner that cement bags can be removed on principle of first come first served i.e. oldest cement should be taken out first.

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