For construction companies that build large structures like bridges, tunnels, stadiums, office towers, detached houses, apartment buildings, factories and assembly halls, processing large volumes of concrete is critical to your business. Finished parts, liners, railroad ties/sleepers, girders and pillars must meet demanding standards for longevity and resistivity, as well as frost and water resistance. One highly effective method for achieving these standards is to apply vibration with an industrial vibrator to the concrete as it’s drying. This forces any trapped air bubbles to the surface, thereby strengthening the final product.
Proven technology combined with innovative solutions
At NetterVibration, we have developed highly innovative compaction solutions for the construction industry, including the the prize-winning GyroShake, which operates in complete silence, eliminating unsafe noise levels, as well as high performance shakers for slipform pavers and pneumatic external vibrators for tunnel formwork. NetterVibration also supplies vibrators and equipment for the conveying, sieving and dosing of aggregates.
With more than 60 years of experience manufacturing internal and external vibrators, NetterVibration has a long track record of meeting the demands required by builders on construction sites and in precast factories.
Our experienced application experts here to help you determine which solution is right for your application and make sure that meets your needs once it’s up and running. Just contact us and let us know how we can make your operation more efficient and more profitable.
As part of a case study in a research project, our customer examined the ideal length of wooden breakwater posts which are to be embedded in the sand, protecting the beach against coastal erosion. The goal was to reduce the length of the piles to a minimum in order to reduce the amount of material and energy used. At the same time, the wooden piles should be stable enough to withstand the swell.
As there was no possibility to use the sensitive measuring devices required in salty seawater, the piles were set on the waterfront. The customer used a pneumatic linear vibrator series NTK 25 fixed on the piles to simulate the force and frequency of the ocean waves. In this way, the long-term effect of the swell could be successfully replicated.
With the knowledge gained, the consumption of wooden piles can be reduced to a sustainable level. The reduction of resources, energy and time necessary to install the piles, that are too long, is also very beneficial for the environment.
A NetterVibration customer in the construction industry in Laos was contracted to build a hydropower dam made of several hundred thousand cubic meters of concrete. The aggregates mixed to this concrete were of a size between 20 and 150 mm. The customer wanted NetterVibration to provide a solution that would compact such concrete in a short time, as they had to pour about 180 m³ of concrete per hour.
They purchased 8 NetterVibration NVI 3 Mass Concrete Compacting Units to be mounted on hydraulic excavators. Each equipment consisting of 3 vibrators was connected to the hydraulic system of the excavator and therefore completely autonomous. The NVI 3 works by inserting the internal vibrators (diameter 150 mm) into the moist concrete, applying vibration, and then moving on to the next spot until the whole concrete block has been compacted. The size of one block is such that 2 or 3 excavators work in one block simultaneously.
After one block is compacted the excavators with the NetterVibration NVI 3 Compacting Unit is moved by crane to the next block.
A NetterVibration customer is involved in the manufacture of precast concrete slabs for a variety of uses. In order to compact concrete while it is poured into the mold, NetterVibration supplied him with pneumatic vibrators and brackets adapted to his automatic carousel production.
The customer purchased some NetterVibration NTS 50/08 Pneumatic Linear Vibrators and installed them on the vibrating table according to NetterVibration application engineers’ advice. Once completely cured, the concrete slabs were of high resistance due to the density of the concrete, and impermeable to water intrusion. The vibration also gave the slabs a smooth surface and cut down on the manual flushing time.
With a customised vibration table from NetterVibration, Roland Schulze Baudenkmalpflege GmbH, a provider for the preservation of historical monuments, gained a much more effective production process in the field of concrete restoration work on listed buildings.
The traditional family business from Potsdam, Germany, uses the vibration system for the production of high quality, bespoke concrete parts, such as steps and columns in parks or for the restoration of house facades and balconies. The new vibration table from NetterVibration replaces the previously used concrete compaction method with internal vibrators.
The tailored vibration table is driven by two external electric vibrators mounted on the underside of the table. The constant vibration deaerates the concrete and ensures uniform compaction in the moulds on the tabletop. The result: absolutely air-free concrete parts for the further processing and finishing.
With the associated frequency converter, the effective speed of the electric vibrators can be set according to the application and conveniently switched on and off. Another technical detail is the levelling feet, which are height-adjustable to compensate for uneven floors and give the table a firm hold. In addition, this makes it easy to move the unit with a pallet truck.
A NetterVibration customer in the construction industry manufactures concrete railroad sleepers on a semi-automated circular production plant. In order to ensure that the pre-stressed railroad sleepers would conform to the high quality standards of the railroad company, the concrete needed to be vibrated intensely.
The company purchased Netter NEG Series Electric External Vibrators and a special frequency control. The vibrators where installed on the vibrating table that received the molds, applying vibration during filling of the concrete into the mold. The size of the vibrators, the appropriate frequency and the correct location was determined by NetterVibration .
As a result the rail broad sleepers were perfectly compacted at the minimum possible noise level.
A customer asked NetterVibration for a study to implement pneumatic high frequency vibrators on the formwork to compact concrete. NetterVibration supplied the technical drawing that showed the spots where the vibrator had to be mounted and thus the mold supplier was able to manufacture the mould accordingly.
This customer purchased a large quantity of Netter NTV 61 Pneumatic External Vibrators that were installed in strategically chosen spots on the mold. These spots were determined by engineers from NetterVibration. The high frequency rotary pneumatic vibrators applied to the mold compact the concrete efficiently to the total satisfaction of the customer and the German railway company.
As a result, once the concrete was cured, the absence of trapped air led to more density and stability.
A NetterVibration customer in the shipping and transport industry was experiencing difficulty in thoroughly emptying hopper cars of ash upon delivery. Because ash tends to retain some moisture, it was forming clumps and sticking to the inside of the car. Frequently, workers would have to dislodge the ash manually, which is time consuming and risky, or the trains would simply return without completely emptying the car.
The customer purchased an NHW 7000 hydraulic vibrator and, using a front loader, applied the vibration to the hopper car while it was being unloaded. This shook the ash off of the sides and bottom of the car, allowing it to fall freely out of the car. As a result, the car is emptied faster, and because it is emptied thoroughly, it can be re-filled completely, allowing more material to be delivered with each trip.
A Netter customer in the construction industry was working with gravel consisting of rocks of varying sizes, which needed to be separated into groups of large and small rocks while conveying the gravel from one station in the process to the next.
The customer purchased a KRD-FL 80-350 closed trough and sieve with dual outlets, one for larger rocks and one for smaller rocks. The sieve is driven by a NTK 85 NF pneumatik linear vibrator connected via series FlexiLink. During processing, the smaller rocks fell through the openings of the sieve and were conveyed through one outlet, while the larger rocks stayed on top of the mesh and were conveyed through the other outlet.