Many of the UK’s 60,000-70,000 masonry arch bridges are well over 100 years old, are often listed structures and urgently require structural repair and strengthening. Weathering and increasing loads and stresses have, in numerous cases, led to problems. These could range from movement in the spandrel wall to separation and cracking.

We at MC-Building Chemicals have a range of solutions from concrete repair to also waterproofing solutions to prevent further corrosion and damage.

Our Nafufill KM250 repair mortar is a structural, high strength material. Nafufill KM250 is a versatile mortar and can be used to repair damaged structures or fireproof any existing host concrete to provide compliance, to site specific fireproofing requirements. The system is rapidly applied using wet spray technology, allowing return to service of structures within 24 hours of completion, providing a robust structurally enhanced mortar finish that meets modern fire regulations.

As for our waterproofing solution, we specialise in bridge deck waterproofing in particular. We have developed a resin injection that gives engineers the capabilities to carry out work from the underside of any structure providing significantly reduced costs and disruption by eliminating expensive track up or highway excavations. In fact, all works are carried out with road and rail traffic functioning as normal.

Droitwich Viaduct

Client: Network Rail

A 7 span traditional rail over road masonry brick structure suffering from water ingress issues.

Network Rail’s options were to use traditional ‘track up’ waterproofing means, however this solution was quickly ruled out due to track disruption and excessive cost.

The MC elastomer waterproofing solution was adopted as a suitable system with all waterproofing works being carried out from the underside of the structure without disruption or speed restriction to rail traffic above.

Network Rail and their contracting partners have both expressed their complete satisfaction with the MC system and have gone on to adopt this technique on numerous other structures.