Housing in Southern Africa September 2015

Infrastructure & Mixed Use

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

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.

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

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.” ■

September 2015