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Chapter: Civil - Construction Techniques, Equipment And Practices - Concrete Technology

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Transporting of concrete

Transporting of concrete
Concrete can be imported by variety of methods and equipments methods adopted for transportation of concrete

Transporting of concrete

 

Concrete can be imported by variety of methods and equipments methods adopted for transportation of concrete

 

        Mortar pan

]   Wheel barrow

        Crane, bucket and rope way

        Truck mixers and dumpers

 

        Belt conveyors

        Chute

 

        Skip and hoist

        Transit mixer

 

        Pump and pipe line

        Helicopter

 

 

Mortar pan

 

This case concrete is carried out in small quantities. This method exposes greater surface area of concrete for drying conditions. This results a geat loss of water particularly in hot weather. Mortar pan must be wetted to start with and must be kept clean.

 

Wheel barrow

 

Used for transporting concrete in ground level. This method is employed for hauling concrete in longer distance in case of concrete road construction. If the distance is long or ground is rough it is likely that the concrete get segregated due to vibration. To avoid this, wheel barrows are provided with pneumatic wheel.

 

Crane bucket and rope way

 

This is one of the right way for transporting concrete above the ground level. Crane can handle concrete in high rise construction project and are becoming familiar sites in big cities. Rope way buckets of various sizes are used.

 

Rope way method is adopted for

Concrete works in valley

Construction work of the pier in the river

For dam construction

 

Truck mixer and dumpers

 

For large concrete works particularly for concrete to be placed at ground level. These are ordinary open steel tipping lorries Dumpers having 2-3 cubic meter capacity Belt conveyors also can be used.


Chutes

 

Provided for transporting concrete from ground to lower level. The surface should have same slope not flatter than 1 vertical to 2 and a1/2 horizontal



Skip and hoist

 

Adopted method for transporting concrete vertically for 3 to 4 floors. Mortar pan with staging and human ladder is used for transporting concrete.

 

Transit mixer

 

This is the equipment for transporting concrete over a big distance particularky ready mix concrete. They are truck mounted having a capacity of 4 to 7 m3. The speed of rotation of truck mixer is 4to16 rev/min. A small concrete pump is also mounted on the truck carrying transit mixer.

 

Pumps and pipe lines

 

Universally accepted method Starts with the suction stroke for suck the concrete inside the pipe. It has a piston which moves forward and backward to have suction and delivery of concrete

 

        Choosing a correct pump involves

 

        Length of horizontal pipe

        Length of vertical pipe

 

        Number of bends

        Diameter of pipe line

 

        Length of flexible hose

        Change in line diameter

 

        Slump of concrete

 

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