Civil Engineering - Concrete Technology - Discussion

400m for real? I have wroked with a pump which can pour upto 40m only.

0.5 - 0.65 w/c ratio should be when the concrete transported by pumps.

What should be the water/cement ratio in concrete transportation by pumps?

The effective pumping distance:

300-1000ft for horizontal.
100-300ft for vertically.
So 400m is right option.

Refence book - Concrete Construction Engineering by Edward G. Nawy.

It is the maximum limit or minimum limit?

300 m is the right answer.

The latest pump concreting in horizontal distance upto 2000 meter & vertical 400 meter by Puzmesister pump machine. It depends upon machine "Bar power".

It will be maximum vertical distance of 50m.

I totally agree with your statement @Abhishek Paliwal.

Two types of concrete pumps are used:

Direct-acting, horizontal piston type with semi-rotary valves set to permit always the passage of the largest aggregate particles. This type of pump can cover a horizontal distance of 1000 m and a vertical distance of 120 m. The concrete is fed in by gravity and is also partially sucked in during the suction stroke. The valves open and close with definite pauses so that concrete moves in a series of impulses, but the pipe always remains full. These pumps are capable of pumping 130 m3 of concrete per hour with 8-inch pipes.