Preserving Reinforced Concrete
Author(s)
A. Foster, C. Atkins & L. Buckley
Abstract
There is some debate as to when reinforcement was first added into concrete.
Most concur that the Parthenon in Rome was fibre reinforced with animal hair
almost 2000 years ago. After this, there is a difference of opinion between the
French and the British as to the first iron reinforcement in the mid 1800s, with
both claiming precedent. The first formally designed systems for reinforced
concrete date from the 1900s produced by Hennebique and Mouchel.
Early reinforced concrete structures are now falling within the remit of
heritage structures, for example the Liver Building in Liverpool dates back to
1908 and is located on a UNESCO world heritage site. As time passes more and
more post war structures are becoming recognised for their uniqueness and
achieving protected status. This naturally includes increasingly large numbers of
reinforced concrete structures.
This paper discusses the various degradation mechanisms of reinforced
concrete and methods of protection available. In addition the sustainability
arguments for preserving rather than replacing concrete structures are
highlighted, regardless of the aesthetics.
Keywords: reinforced concrete, corrosion, repair, sustainability.
1 Introduction
Formally designed reinforced concrete structures are part of our heritage, and are
becoming recognised as such. However, durability has only been considered as
an issue within design codes within the last 30 years (although corrosion of
reinforcement was identified as a problem as early as 1910 [1]). The fact that any
reinforced concrete structures are durable was not an original design
consideration, but more a happy coincidence or side effect. The result of this is
that a large number of the reinforced concrete heritage is in an increasingly poor
condition. This paper presents a review of the historical systems that were in use,
Keywords
reinforced concrete, corrosion, repair, sustainability.
Related Book
Other papers in this volume
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