The water enters into chemical action with cement and this action causes ____ and ____ of concrete.

Most important affect of corrosion is the formation of _____

Identify the given joint in Concrete Structures.

_________ vibrators are mounted on platforms or screeds.

One of the important effects of the collision is the formation of ___

Cement concrete is prove to be more economical than _____

The presence of moisture in the sand _________ the volume of the sand.

_________ vibrators consists of the Steel Tube which is inserted in fresh concrete.