Concrete repairs on Durban Harbour Tunnel

a.b.e.-CC-Durban-Harbour-TunnelVarious concrete repair and waterproofing products have been supplied by a.b.e. Construction Chemicals for repairs on the Transnet underwater tunnel which follows the perimeter of the Port of Durban’s Pier 1. a.b.e. technical sales consultant in Durban, Deon de Kock, says the company’s durarep FR, epidermix 344, duraflex and durakol GHM, were applied by contractor, GVK Siya Zama, to repair spalled concrete areas in the container terminal’s services tunnel.

“durarep FR and epidermix 344 form a highly effective combination for concrete repairs. In this case, the system was used to increase the tunnel’s resistance to chloride and carbon dioxide penetration and extend the durability of the structure,” says de Kock.


durarep FR is a fibre-reinforced structural repair mortar suitable for vertical and overhead applications. The product is supplied ready to use and is simple to apply. It offers superior bonding to concrete and is a non-shrink mortar with a high ultimate strength. In addition, durarep FR is resistant to salt, frost and thawing and has an abrasion resistance four to six times stronger than plain rendering. It is chloride-free and non-toxic.

De Kock adds that, “a.b.e.’s duraflex flexible waterproofing system was applied to all internal walls and floors of the tunnel, to prevent the seawater from penetrating the tunnel on the edge of the pier. All joints were subsequently sealed with durakol GHM sealant.”


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