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September 2015
D
eon de Kock, a.b.e. KwaZulu-
Natal explained that three
a.b.e. products were selected
for the fast-track repair project car-
ried out by Lowazi Projects. “After
extensive consultations with SANRAL
engineers, a.b.e.’s durarep FluidMicro
Content (FMC), epidermix 345, and
silocoat, were specified for the repair
project.
a.b.e.’s durarep FMC is a cement-
based, non-shrink concrete reinstate-
ment grouting, applied by pouring or
pumping. The select grading of aggre-
gates and special additives prevent
segregation during pouring, and also
ensures that the thermal coefficient
of the cured product matches that of
the concrete. The end-result is im-
proved and a decrease in permeabil-
ity. It adheres to substrates without
the need for primers, while its fluid
properties prevent honeycombing
of concrete, even without vibration
or additional compacting.
“The product’s high strength and
low permeability, provide protection
against chloride and carbon dioxide
corrosion, and its alkaline nature
protects the reinforcing steel against
corrosion. Shrinkage control - both
during the plastic andhardened stage
- has been built into the durarep FMC
formula, and the ‘dustless’ cementi-
tious product eliminates unhealthy
dust on building sites,” said de Kock.
a.b.e’s epidermix 345 is a struc-
tural wet-to-dry epoxy concrete
Ashburton Bridge
South African National Roads Agency Limited (SANRAL) chose a.b.e
products for the repair of the Ashburton Bridge over the N3 highway
between Pietermaritzburg and Durban after a truck crashed and
caused fire damage to the bridge.
T
he Jericho Water and Sani-
tation Forum in Madibeng,
North West, will brief local
residents about the details of a plan
to reticulate drinking water to the
water-scarce village. A workforce of
300 people have been recruited from
the local community to work on the
project.
This forms part of a drive by the
Department of Water and Sanitation
and the provincial Department of
Local Government andHuman Settle-
ment to restore water to 19 villages
that fall under the Madibeng Local
Municipality.
Majakanengwas the first village to
benefit from the department’s plan,
which was implemented in March
2015. Approximately 30 000 villagers
have already benefitted from the
multimillion water project being
implemented by Magalies Water.
The project will roll out in five
phases:
•
Initiation and planning sched-
uled for completion in August
2015
•
Design which is scheduled for
completion in September 2015
•
Implementation which will be
rolled out between October –
March 2016
•
Commissioning scheduled for
March 2016
Part of thework in Jericho includes
optimising existing boreholes that
are not working, equipping two new
boreholes, refurbishing and laying a
supply line between the boreholes
to the reservoir. This will involve re-
pairing the reservoir, installation of
water meters and telemetry, as well
as water treatment with chemicals.
■
Water for
Jericho
adhesive with extended open-time
capability. “It is useful where rebar
and shuttering have to be installed
prior to the new concrete being
poured. The adhesive’s high ultimate
strength exceeds that of concrete
and, as it is solvent free, it can be used
in any location.”
He added that the final a.b.e. prod-
uct used for the Ashburton Bridge
repair was silocoat, an elastomeric
two-component polymer modified
cementitious coating, primarily
designed to protect and repair silos
but also suitable for other concrete
structures.
“The silocoat coating withstands
hydrostatic pressures, and can easily
be mixed on site, prior to application
with brush, roller or spray. It provides
an effective barrier against sulphates
and chlorides and will bond to damp
concrete.”
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Infrastructure & Mixed Use