Addenbrookes Hospital – Concrete Repair and Coatings

Any nurse knows that you can’t just stick a plaster on a serious wound and expect all to be well; some cleaning up and repair work may be required! The situation is similar with buildings; in this case, a concrete repair treatment is necessary. You cannot restore a building structure simply by giving it a new coat of paint! Careful examination, diagnosis and finally treatment are required to ensure recovery back to full health.


The nurses’ accommodation at Grantchester House, is a high rise block of flats situated at Addenbrooke’s Hospital, Cambridge. The windows needed replacing, and the facades required restoration. First of all RonaBond HB40 concrete repair mortar was used for the concrete repair. Finally, the ‘operation’ – the finished facades were coated with RonaBond Anti-Carbonation Coating WB.


RonaBond HB40 – Concrete Repair

RonaBond HB40 is a pre-packed high build, medium strength repair mortar for repairing concrete and protecting reinforcing steel. It is used to repair concrete facades and is suited for overhead applications. Its combination of ease of use and strength makes it an ideal product. It can be applied in thick-section layers up to 75mm on walls and soffits. As a result, it provides good cover to steel reinforcement.


RonaBond Anti-Carbonation Coating WB – Protection

RonaBond Anti-Carbonation Coating WB is a smooth, coloured, water-borne acrylic anti-carbonation coating for use on vertical surfaces, soffits and at DPC level.  It allows the passage of moisture vapour so it is particularly suited for application to substrates which may contain entrapped moisture.  The coating can be applied to external walls and facades and protects against water, frost, and weathering. In addition, it is also an effective barrier against the damaging effects of carbon dioxide gas.
Notably, RonaBond Anti-Carbonation Coating WB is available in a standard range of more than 300 colours. BS or RAL colours can be produced, and the life expectancy of the system is more than ten years.


BS 8204-1 “Concrete bases and cementitious levelling screeds to receive floorings — Code of practice” section 6.11.1 suggests the following calculation for drying of screeds with no fast drying additi ...

Read more


Aggregate is usually 0–4 mm and is mixed with cement in the ratio of 1:3 or 1:4 cement to sand, depending on strength requirements and drying requirements. For total screed thicknesses in excess of 50 ...

Read more

Carbonation of Reinforced Concrete

Carbonation is the single most common cause of reinforcement corrosion in above ground structures and although many construction professionals and contractors are familiar with the progression of carb ...

Read more

Here to help...