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Mammoth rehab for Blue Bulls home

Online since 3.11.2015 • Filed under Advertorial • From Issue 16 page(s) 143
Mammoth rehab for Blue Bulls home

Loftus Versveld Stadium in Pretoria has recently undergone a mammoth concrete rehabilitation project.

Attending structural engineer, Erhard Kruger from HGK Consulting, specified concrete repair and protection products from Swiss-based, Sika, for the rehabilitation of Loftus Versveld Stadium. The contractor, Stefanutti Stocks, commenced the project early in 2014. Many challenges were faced during this project,  including a prohibitive time schedule, with no work permissible on weekends or when a sporting event was scheduled. Sika’s technical sales manager, Jacobus Pretorious, ensured the smooth running of product supply, and comments that the following products were used in major repair work:

• SikaTop Armatec-110 EpoCem containing corrosion inhibitors was used as bonding primer and steel reinforcement protection – an epoxy resin coating material that provides extended open times for repair mortars, is certified for application under dynamic load conditions, and is internationally approved.

• SikaGrout-212, a high-strength fluid-expanding grout with adjustable consistency and excellent flow characteristics, was used to repair the large concrete floor and seating areas.

• Large scale repairs to concrete walls including all vomitory walls at the stadium were achieved using Sikacrete-214, a free-flowing, high-strength cementbased micro concrete with a maximum aggregate size of 9mm. Both SikaGrout-212 and Sikacrete-214 are shrinkage compensated and display rapid strength development.

• Overhead concrete sections requiring applications to a maximum depth of 35mm were repaired with Sika Rep LW, a cement-based, multi-purpose patching and repair mortar.

• Thick layer overhead repairs, up to a depth of 70mm, were reached using Sika MonoTop-615 HB, a high-build cementitious polymer-modified repair and reprofiling mortar containing silica fume and corrosion inhibitors. Its adjustable consistency and thixotropic behaviour provide excellent workability characteristics. Both products offer high resistance to freeze/thaw cycling.

• Once concrete repairs were completed, the waterproofing and protection phase commenced. For increased concrete cover and overall concrete protection, SikaTop Seal-107 ZA was applied. This is a two-part, polymer-modified waterproofing mortar slurry comprising a liquid polymer and a cement-based mix with ad-mixtures, which is ideally suited for protection against ingress, and provides moisture control and increased resistivity.

• Concrete box gutters at the stadium were protected with internationally-approved Sikalastic-152, a twopack, elastic fibre-reinforced, waterproofing coating. Thanks to its high elasticity, it provides optimum adhesion onto almost all substrates and can be applied to many different structures including those subject to thermal movement or vibration.

• Concrete column heads were waterproofed with Sika Cemflex, an acrylic-based emulsion that is watertight, oil resistant and UV stable. Although the playing field at Loftus Versveld has not changed in over a century, the spectator and player facilities have been considerably improved. With these vast concrete structures having received rehabilitation treatment, SA’s famous stadium will be safely hosting many more spectacular sporting events far into the future.

Sika South Africa (Pty) Ltd

T +27 31 792 6500

W www.sika.co.za

Issue 16

Issue 16

November 2015

This article was featured on page 143 of
To Build Magazine Issue 16.

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