2016 CON JUNE FINAL LOW RES PDF with links

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Forming part of Sika’s Concrete
Repair and Protection System, Sika
FerroGard-903+ and Sika MonoTop-610
were specified by Sika’s John Zehmke.“Corrosion
protection provided by these products increases
the service life and reduces the maintenance
life cycle of reinforced concrete. SP Excel Plant
& Civil were contracted to apply the numerous
Sika products,” said Zehmke.
As a Migratory Corrosion Inhibitor (MCI),
Sika FerroGard-903+ was spray applied onto the
concrete to form a protective monomolecular
layer on the surface of the reinforcing steel.
This passivation of the steel delays the onset
of chloride-induced corrosion and reduces the
rate of corrosion.
Based on organic compounds, Sika
Ferrogard-903+ does not alter the water vapour
diffusion of concrete, prevents development of
incipient anodes and its easy applicationmakes it
suitable for use where other repair or prevention
options are not affordable.
Sika MonoTop-610, a cementitious, polymer
modified, one-component, bonding slurry and
primer with active corrosion inhibitors, was used
for protection of the reinforcing steel. It provides
excellent adhesion and good resistance to water
and chloride penetration.
For repairs on the deteriorated concrete,
Sika Rep, a one component, cement-based
multi-purpose patching and repair mortar
was used. It is shrinkage compensated, vapour
permeable and provides excellent adhesion.
SikaGrout-212, a high performance, non-cor-
rosive, cementitious grout was used for repairing
concrete. Easy to mix with an adjustable
consistency, it provides rapid strength devel-
opment and high final strengths. It expands by
MAITLAND RIVER MOUTH PIPELINE
Last year Port Elizabeth’s Nelson Mandela Bay
Municipality determined that after more than
20 years without maintenance, the city’s main
water pipeline at Maitland River Mouth was in
need of refurbishment. Engineers from Aurecon
turned to Sika to supply its highly durable
products for waterproofing and protection of the
pipeline itself, as well as repairs to the concrete
base structures supporting the pipeline.
gas generation whilst still in the plastic state
of curing, resisting the tendency of grouts to
shrink away from restraining surfaces during
the setting phase.
Remaining cracks in the concrete were
injected with Sikadur-52 ZA, a two-part, solvent-
free, low viscosity injection liquid, based on
high strength epoxy resins. It not only forms an
effective barrier against water infiltration and
corrosion promoting media, but also structurally
bonds concrete sections together.
“All of these high performance Sika products
used enable easy mixing and application. Upon
completion of this yearlong project, 432 m2 of
concrete were completely rehabilitated thereby
significantly increasing the expected lifespan of
this vital pipeline,“ concluded Zehmke.
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