asphalt

Do You Want to Increase Efficiency When Pumping Asphalt?

This is how to permanently reduce wear when pumping asphalt 

Choosing the right pump is crucial for the efficiency of your system. But the variety of different pump types is enormous. Identifying the right pump type for an application can quickly become challenging. 
A Dutch road repair company faced the same problem.

As a global specialist in complex fluid management, NETZSCH Pumps & Systems has a broad product portfolio and the expertise to support you in choosing the right pump solution from the start. Our experts will work with you to find the optimum pump for your application. We will show you how to avoid unplanned downtimes and sustainably increase your efficiency when pumping asphalt.

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Asphalt, NETZSCH, Pumps, Systems

Pump asphalt on-site and clear the road for traffic in less than an hour

Whether car drivers, motorcyclists, lorry drivers or cyclists, everyone knows about the problems road potholes cause. According to the federally owned Autobahn GmbH, in 2023, there will be 552 road works on German motorways alone, causing traffic jams and loss of time. But not every closure necessarily has to last long. To reopen the streets for traffic as quickly as possible in the case of minor road damage, a Dutch company has developed a unique technology. A fast-curing synthetic resin-based repair asphalt is mixed and applied directly on-site on a particular vehicle. The major advantage of this method is that the road can be cleared for traffic after less than an hour.

Challenges to consider when pumping asphalt

To prepare the special mortar, cold asphalt is transported directly on-site on a particular vehicle from a tank with a stirring unit to a static mixer and pumped through it. Afterwards, the same vehicle shovels gravel from a reservoir over the cold asphalt. For the first step, conveying the mixture of resin, sand and silver sand, a rotary lobe pump was previously used, which had to be operated at speeds of around 250 to 300 revolutions per minute. This led to high pulsations and increased wear due to the very abrasive medium. The elastomer lobes were particularly affected. They had to be replaced by a specialist every two to three weeks. As a result, the vehicle was often out of order. This resulted in high downtimes and enormous costs for the Dutch company. The appropriate pump from NETZSCH provided the remedy. The specialist for pumping complex media has the optimal solution in its portfolio for reducing unplanned downtimes and, thus, your maintenance costs.

10000

mPas are no problem

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With the NEMO® BY progressing cavity pump in FSIP® design with xLC® stator adjustment system, you can reduce your maintenance time by up to 66 percent.

Reduce your downtime with this asphalt pump

Choosing the right pump depends on many factors, such as the pumped medium, flow rate, pressure, viscosity or temperature. After thoroughly analysing the requirements and operating conditions, NETZSCH advised the Dutch company to replace the rotary lobe pump previously used to convey the cold asphalt with a NEMO® progressing cavity pump in FSIP® design. Progressing cavity pumps offer gentle conveying with little shearing and pulsation. This makes the NEMO® particularly suitable for pumping cold and viscous asphalt om the repair verhicle. A large pump model has been selected which makes optimum use of the space on the vehicle and, at the same time, ensures the lowest possible rotation. This allows for prolonged and precise pumping at 50 to 75 revolutions per minute. At the same time, the delivery rate could be doubled to one cubic metre per hour. This significantly increased the efficiency of the plant of the Dutch specialist for road repairs. 

Thanks to the stainless steel components and the EPDM (ethylene propylene diene rubber) elastomer parts, the asphalt pump works without any problems. In addition, service and maintenance work can easily be carried out on the selected model. When changing the stator, you can save up to 66 percent of working time thanks to the innovative FSIP® design. All wearing parts can be replaced in less than half the previous time. However, the progressing cavity pump offers another decisive advantage in pumping asphalt. Since it works trouble-free compared to the previous pump, it has a positive effect on the operating times of the machine but also on the curing time of the asphalt to be repaired. Due to the coupling rod's auger flights, the medium's components are continuously mixed well with each other. Thus the through drying of the mortar is completed in a shorter amount of time. Thanks to choosing the right pump for pumping the asphalt, the roads can be opened to traffic even sooner.

NEMO® progressing cavity pump in FSIP® design

  • Medium: Mixture of resin, sand and silver sand
  • Speed: 50 to 75 rpm
  • Flow rate: 1 m³/h
  • Temperature: 20 °C
  • Pressure: 5 bar
  • Viscosity: 7,000 to 10,000 mPas
NEMO® Progressing Cavity Pump in FSIP® Design, NETZSCH, Pumps, Systems