The basins in need of refurbishment at Schönminzbach Park had previously undergone sandblasting and cosmetic concrete repairs as part of the contract, but these were not to the client’s satisfaction.

The sandblasting process opened up the capillaries in the previously dense concrete surfaces, allowing water to seep in and causing the concrete’s alkalinity to deteriorate, thereby compromising the natural protection of the reinforcing steel against rust. Beconart therefore had to take measures to seal those capillaries once again.

It was necessary to repair numerous collapses along the edges, flaking concrete on the internal walls, and variations in height on the basin walls, as well as air voids. All exposed concrete surfaces were reworked to ensure evenness, repair damaged areas, improve surface texture and achieve colour uniformity.

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