PRESS RELEASE: Putzmeister has been expanding its range of mechanised shotcrete equipment in recent months.
Its new Wetkret 4 concrete sprayer is suitable for the construction of narrow galleries in underground mining, due to its heavy-duty chassis with a compact size (1,900mm in width and 2,200mm in height) and a reduced turning radius. It includes two spraying arm versions, adapting to the client's gallery requirements, one with a maximum vertical reach of 10m and one with 7.5m.
According to Putzmeister, the Wetkret 4 shotcrete pump guarantees a homogeneous application, ensuring the required quality and layer of thickness, as well as reducing rebound. Its concrete flow of 20m3/h allows for increased productivity.
Wetkret 4 also comes equipped with automatic synchronisation of the additive dosage with the concrete flow, a FOPS/ROPS-certified cabin that faces the direction of travel, ICVD hydrostatic transmission, an integrated air compressor and optimal weight distribution.
Mixkret 3, in turn, expands Putzmeiter's Mixkret family (Mixkret 3, Mixkret 4 and Mixkret 5), and is designed to improve the overall shotcrete process.
The mixer is compact and robust, small in size and turning radius, and suitable for narrow-vein mining. It also complements the Wetkret 4 concrete sprayer, which contains the same components, facilitating and improving spare parts management.
Putzmeiter said the Mixkret 3 is the only mixer in the market of its height (2,200mm) that has a mixing capacity of 3m3.
Like the rest of the Putzmeister's Mixkret range, the new model comes with a powerful motor (a diesel engine with four cylinders and 106kW), offering good capacity for climbing and transfer, as well as the ability to work at height. It also has a continuously variable hydrostatic transmission system (ICVD) without gear changes, which improves climbing ability, transfer speed, starting acceleration and fuel consumption.