 |
St.
Anne’s Court is a historic Grade II ‘Star’ Listed
Structure which was designed and built in 1937 by the famous
minimalist architect of the ‘Modern Movement,’ Raymond
McGrath. In this structure McGrath also pioneered the use of
Oregon Pine timber forms to produce an architectural
boardmarked concrete finish.
By the mid 1990s, the carbonation process had progressed
beyond the depth of the steel and, where moisture ingress
had also occurred, expansive corrosion of the steel had led
to detrimental cracking and spalling. A full survey
identified all the existing damage and further indicated
a large number of exposed concrete surfaces with a high risk
of damage due to the progressive loss of protective
alkalinity.
The damaged concrete was repaired with polymer modified
cementitious mortars, special cosmetic grades of which were
finished by hand tooling to recreate the original board
texture. To protect against further damage development, the
surface was then treated with a penetrating corrosion
inhibitor to form a protective layer on the surface of the
steel. Finally, a water-based anti-carbonation and
waterproofing coat was applied over the entire restored
board profile concrete in the originally specified off-white
color.
This project symbolizes what can be achieved by the use of
21st century repair and protection technologies in
combination with a sympathetic approach to the refurbishment
of our heritage.
|
LOGIN
