Concrete pump makes precast manhole production more economical
Manufacturers of precast concrete products are often faced with the problem of providing economic production options even for processing small concrete quantities. One example is the production of precast manhole components for sewers. The channel of these components require a wide range of diameters and connection angles with different inclinations.
The Austrian Schlüsselbauer Technology GmbH & Co.KG has developed a production system with which – using negative mold bodies and special formwork – elements of highly individual shapes can also be easily manufactured. With this system, even the production of small quantities is profitable. The new system is ideal in combination with a mechanical concrete batcher and a concrete pump that is specifically designed for the purpose of relatively small delivery rates.
Economical production even for components with individual dimensions
A new plant, based on the so-called “Perfect” system, was recently commissioned in the Czech concrete and precast plant Betonika plus s.r.o. in Luzec nad Vitavou, around 25 km north of Prague. Betonika plus s.r.o., with a workforce of around 90 and a market share of 20%, apart from the production of ready-mixed concrete (approx. 30,000 m3/year), is one of the most successful and strongest Czech manufacturers of precast concrete components for rainwater and wastewater sewers. The product line comprises concrete containers, slotted concrete gullies, pipes, manhole bottoms, manhole rings and special parts that are cast in a single step. The manhole bottoms, through which sewer channels run, used to pose a real challenge during production: in the first production step, the manhole bottom was manufactured by the classic precast construction method; in a second processing step, the work-intensive manual lining with ceramic tiles took place. The “Perfect” plant solves this problem with a negative polystyrene rigid foam mold that is cut to the desired diameter, angle and inclination of the channel and fixed-in place in the two-part formwork.
