DYNAJET efficiency: cleaning a bunker silo

The 60 metre long and 2.60 metre high walls of an ageing bunker silo had been coated all over with bitumen to prevent the silage juice from damaging the concrete and contaminating the groundwater. It had also had to permanently withstand being continuously driven over by vehicles filling and removing silage from the silo. After a while, bunker silos must be properly restored so that they can continue to comply with these legal conditions. The special challenge lay in treating the two different areas of the silo correctly: on the one hand, the area that was previously covered by the silage, where the coating and concrete had been attacked by the silage juice; on the other, the area above, where the coating was weathered, but the concrete was still intact.

With the DYNAJET 800th wireless hot- and cold-water trailer, both areas could be cleaned rapidly, efficiently and economically. For the area previously covered by the silage, the RDS-Easy 3000-6 rotor nozzle was deployed. At a working pressure of 500 bar (7,250 PSI) and with hot water, the coating and the loose concrete could be reliably removed. Afterwards, the underlying surface still had sufficient tensile strength. For the area above, the RDS-Easy 3000-6 rotor nozzle could also be used without problem. Here, the coating was completely removed and the concrete slightly roughened with hot water at a pressure of 800 bar (11,600 PSI). So, the entire silo was freed of its old coating within just one day.

Further links:

• Application report & video
• DYNAJET 800th wireless
• RDS-Easy 3000-6 rotor nozzle