Nafuclar range of surface retarders for production of exposed aggregates concrete finishes is manufactured by utilizing latest polymer technology of MC-Bauchemie Germany by MC-Bauchemie (India) Private Limited. Nafuclar is used for roughening the concrete surfaces to enable keying of future plasters to obtain better bonding.
Nafuclar is available in several grades like W 32, W 16, W 08, W 04, for different sizes of aggregates and for different depths of etching. Nafuclar S is also available for providing sand faced effect on the surfaces. These properties of Nafuclar enable the architect to design the surfaces and exteriors and interiors in various types. Rounded and coloured aggregates can be incorporated in the mix to give several effects. Nafuclar is also an excellent aid for precast manufacturers of vases, flowerbeds, ashtrays, garden paving, kerbstones, etc. The use not only imparts the surfaces aesthetic view but also avoids the dusting of surfaces, as cement slurry does not come into contact with foot traffic etc.
Nafuclar in normal face down process should be applied to the formwork and allowed to dry. It has mould release properties therefore additional form oil is not necessary. A special grade of Nafuclar called Nafuclar P 20 is available for spraying on the wet surfaces, this enables exposed aggregate surfaces on both the sides for compound walls, partition walls etc. The concrete normal or with special aggregates can be cast in the normal fashion. After opening the form work the next day, the surfaces should simply be cleaned with a jet of water to obtain a flawless exposed aggregate surfaces with even depth of etching. By virtue of formulation only the top cement skin is retarded and other aggregates are more firmly bound in the mass of concrete to avoid falling off of the aggregates.
NAFUCLAR Surface Retarder for Exposed Aggregates Finishes
- NBM&CW November 2012
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