Category Archives: sermac concrete pump

Best pumping concrete techniques and applications

The majority of the concrete pump projects are for larger concrete placements as well as areas that are complex to reach such as a basement or second floor where there is limited access to the site. The speed and ease of using truck mounted or trailer concrete-pumps to direct concrete can save you on a lot of money, time and manpower.

Concrete Pump Types

There are generally 2 concrete types that are used to transport concrete and involve the best concrete pumping methods. These include:

1. Direct Acting Concrete Pumps

2. Squeeze Type Concrete Pumps

The Direct Acting Concrete Pumps

The main types of the concrete pumps happen to be the direct-acting that feature horizontal piston-type along with semi-rotary valves. Operation and the methods of a direct-acting pump are very simple. Concrete will be fed into a pump using gravity along with partial suction which is created from reciprocating motions of a horizontally-acting piston. The semi-rotary valves close and open alternately. The suction pressure in association to 0.08 N/mm2 will be created within the pumping-cylinder under conditions that are favorable.

The ideal suction conditions will be obtained when the diameter associated with a suction pipe happens to be the same when compared to the pumping-cylinder which means the concrete is able to flow unhindered. The concrete need to flow freely in the full-cross sections of a suction pipe and any possible blockages caused from over-sized aggregates needs to be avoided. In the ideal situation, the suction-pipe needs to be more than 3 times the largest size of aggregates inside the concrete which is pumped.

The Squeeze Type Concrete Pumps

The Squeeze Type Pump is a peristaltic and smaller portable pump type. Concrete that comes from a collecting hopper will be fed by the rotating blades which are directed into flexible pipes which are connected onto a pumping chamber. This chamber is under vacuum of around 0.08 N/mm2. This vacuum is what ensures except when it is squeezed by rotating rollers that the shape of the pipe stays cylindrical which allows for a flow of concrete that is continuous and unhindered.

The 2 rotating rollers which have been mounted onto the planetary drives are what progressively squeeze these flexible pipes. This is what pushes concreted into a delivery pipe. An output of around 20 m3/h is obtainable with the squeeze pumps that use 75-mm diameter pipelines.