The required slum of concrete beam and pile structures

The workability is very important in concreting in pile foundation. We will not go to workability rather we provide some information about slump requirements for different types and different level of difficulties in concreting in pile. A slump of (3-6)inch or more is suggested to obtain design concrete strength of piles that are cast-in-situ. For a smooth and straight pipe that is driven vertically, a slump of 3.5in. can perform well. For a pile that has difficulties in reaching concrete to the tip of the pile like vertical pile having heavy reinforcement or having a corrugated shell or in case of batter piles, the slump value must be at least 6 inches.