Construction World July 2021

ADMI XTURES

ON BREE STREET

1 6 on Bree Street offers a broad range of accommodation: from R1,9m studio apartments, through to premium penthouse apartments valued at R13,9m. A few of the key features available in the building are the swimming pool on the 27 th level, a rooftop bar, and a one-of-its-kind electric vehicle charger. The exciting recreation, spectacular views of Table Mountain, the Atlantic Ocean, and indeed the cityscape itself, make this building a worthy visitor ’s destination on its own. 16 on Bree is a structure of high-quality build, so Sika South Africa were honoured such as Cape Quarter, V&A Waterfront and Green Point. Renowned as Cape Town’s tallest, there is a phenomenal 36-storey residential tower located on the ever-popular Bree Street. Strategically situated in the CBD, it is within walking distance of attractions

to be appointed as the product supplier to its revamp and protection project. Having a limited time frame to complete the task, it was started on 23 October 2019, and was completed by the end of February 2021. Concor, the main contractor, together with subcontractors, Skysite and engineers Aurecon/Ekcon, coordinated efforts to ensure a well planned and executed project. Simon Hareb of Skysite, played a critical role in the quality control and application of Sikagard®-550 W Elastic. The aim of the main project was to give the building façade a raw concrete look – known as off-shutter concrete, which is suited to modern contemporary design – whilst still providing an aesthetic protective coating for durability purposes. To achieve this, and to ensure the off-shutter remains in good condition year-round, required a crack-bridging and concrete repair strategy, along with

requirements. To begin with, Sikagard®-550 W Primer was applied evenly onto the concrete, and after a 5-hour drying period, was followed by an application of Sikagard®-550 W Elastic. This process was repeated two to three times, with an 8-hour waiting period between each coat.The project utilised 800 ℓ of primer and a total of 4 880 ℓ Sikagard®-550 W Elastic. In the endeavour for continued perfection, a wide range of RAL colour samples were supplied with over 10 RAL colour requests submitted. Finally, with credit to Sika’s technical manager, Wayne Smithers, the ideal colours were selected, and the desired finish of A range of Sika MonoTop® mortars were used to repair damaged concrete, which also served to give the building a refined, new look. This range, based on their application thickness specifications, allowed for strategic application on different areas of the building, both indoors and out. Needing only water to be added prior to use, a benefit of Sika’s mortars is that they are all compatible, thus facilitating the varying circumstances. Areas that required extensive repairs, were treated with Sika MonoTop®-615 HB, a high build repair and reprofiling mortar. It is designed for thick layer concrete repairs, especially for overhead the building was achieved. Concrete repair

structural strengthening. Crack bridging

As exposure to the outdoor elements can lead to a high risk of concrete cracking, a crack bridging protective coating was applied, in conjunction with the Sika concrete repair system. Sikagard®- 550 W Elastic not only offers weathering protection, but also caters for the aesthetic enhancement to the concrete structures, as per the project spec

26 CONSTRUCTION WORLD JULY 2021