ONE OF the largest UK marine engineering applications of a non toxic concrete impregnator is currently taking place on the north coast of Scotland.
Chem-Crete Pavix CCC100 (Pavix) is being applied to the sea-facing top surfaces of a new 380m long reinforced concrete wave wall to repel salt water spray.
Scrabster Harbour is situated near the west entrance of the Pentland Firth, well known for having some of the world's strongest and fastest tides.
The work at Scrabster comes on the back of Pavix distributor ASI Solutions applying the product to the 1.25km Sheppey Crossing in Kent.
Pavix water-repelling concrete impregnator is relatively new to the UK market but has an established track record in the US, Russia and the Czech Republic.
The solution penetrates into the surface, where its crystals adhere tightly to concrete pores. The crystals rst attract moisture towards them, then swell to form a water-repelling barrier that prevents the further penetration of water or brine.
Consultant Jacobs Babtie is designer and project manager at Scrabster.
'Pavix offers the perfect solution for further protecting the new development at Scrabster Harbour from its constant exposure to sea spray and the threat of penetrating moisture from wave action and prevailing winds, ' said Jacobs Babtie technical director Eric Macaulay.
'It is a single application, totally non-toxic and highlyeffective treatment that can be applied even when surfaces are damp, making it ideal for marine engineering applications such as this.'
Until Pavix was widely introduced to the UK market in 2004, there was no environmentally friendly way of protecting concrete marine structures from corrosive sea salts and penetrating moisture.
The alternative, silane, required two applications and was highly toxic to sh, animals and vegetation. It had the added risk that it might not cure properly under certain weather conditions.