Cement & Concrete

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M2 restoration

A night-time view of a section of the M2

Taking an increasingly heavy toll over the years, sections of the M2 recently required emergency repairs, partly due to a lack of maintenance and rising traffic volumes. These works were carried out by main contractor Stefanutti Stocks between February and October 2019 on behalf of the Johannesburg Roads Agency.

Bordering the Johannesburg CBD, the M2 is an important conduit into and out of the city, as well as a vital link between the N1 and N3 freeways.

Four of Sika’s products were used on the span of the road. Sikadur-32 Normal, a bonding agent, was used to bond the new concrete to the old. In turn, Sika MonoTop-412 NFG – the latest addition to the Sika mortar range – was used for road repairs. The product is suitable for restoration work, structural strengthening and for preserving passivity.

Sika Ferrogard-903 Plus was applied to the concrete surface as a corrosion inhibitor. As a product that is based on organic compounds, it both delays the start and reduces the rate of corrosion. Finally, SikaTop Seal-107 ZA – a waterproofing, chloride and carbonation protective coating – was used for coating the barriers, finishing off a well-executed renovation.

Refurbishment of bridge sections forming part of the M2 bordering Johannesburg’s CBD