Concrete admixes and pigments for coastal pier

Chryso SA concrete pigments for Umhlanga pierChryso SA has supplied essential admixtures and pigmentation products for the concrete used in the construction of the new Umhlanga stormwater pier on the KwaZulu-Natal north coast.

The company’s KZN regional manager, Vishnu Beeput, says Chryso supplied Optima 207 and Lanxess iron oxide pigmentation for the project. The super-plasticiser, Chrysofluid Optima 207, was included in the concrete mix to provide workability, high-strength and durability. The Lanxess iron oxide pigmentation formed part of Lafarge’s Artevia decorative concrete used to colour the Umhlanga pier’s paving.

Chryso and Lafarge are now engaged in close co-operation globally to maximise the potential of Lafarge’s increasingly popular Artevia decorative concrete for exterior structures.

The new Umhlanga pier was built because the old stormwater system that collects runoff from the greater part of Umhlanga Rocks would be inadequate to handle projected increased volumes of runoff that will result from extensive development in the area.

The new outfall pier, which forms part of the upgrading of the overall stormwater drainage system, carries the stormwater discharge across the beach and as far into the surf zone as possible.

The pier’s superstructure is a reinforced concrete ‘double box’ section with six 12-metre spans and a 7.5 metre cantilevered viewing platform at the end. The whale skeleton-inspired deck finish consists of a combination of fibre-reinforced pigmented concrete paving and decorative mosaics.

The main contractor for the project was the Icon/Esor Joint Venture.

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