ON THE COVER: The world’s most powerful range of small angle grinders from Bosch offers even faster work progress, thereby improving the productivity of tradespeople dramatically.
Four models are available, each with a power output of 1 900 W, and covering a range of applications for different trades. These are the GWS 19-125 CI Professional, an all-round tool for all grinding and cutting operations, and the GWS 19-125 CIE Professional, which is ideal for material-friendly applications using low speeds and special accessories such as brushes.
While cracking of plaster is the most common problem encountered by property-owners or contractors, there are also several other types of plastering defects to cause headaches. John Roxburgh, lecturer at The Concrete Institute’s School of Concrete Technology, explains other types of plastering defects, what causes it, and what to do about it.
Sharing its expertise to help customers build their businesses is a vital part of the way AfriSam works, and now the company has developed a special value-added service to boost efficiency among concrete product manufacturers (CPMs).
With so many reports of poor workmanship in the construction of houses and other buildings, it is worth going back to basic truths about how to achieve a high standard of mortar and plaster.
Brenton Brouard, technical manager:concrete at CHRYSO Southern Africa, explains that an acceptable standard mix design demands the use of ingredients that are of an acceptable quality.
From left: Plaster popping as a result of expansion of ash bricks; the Vodacom Data Centre where a waterproof plaster was used to prevent tiles from falling off the façade and one of the most valuable aspects of the Efficiency Audit is the access that customers gain to AfriSam’s SANAS-accredited laboratory at the Centre of Product Excellence’s Roodepoort premises.
Waste management and recycling
An innovative approach saw several impressive environmental initiatives implemented by Murray & Roberts Infrastructure on the Loeriesfontein Wind Farm and Khobab Wind Farm project in the Northern Cape.
After years of trying to responsibly resolve the headache of readymix wastage and returns, AfriSam’s Jukskei Quarry in Midrand has made a breakthrough that will see this unsightly and potentially problematic material reused in its G5 sub-base product for road-building.
From left: Marli van Rooy, environmental officer for Murray & Roberts Infrastructure, outside the modular water treatment plant; another initiative aimed specifically at reducing water consumption at Loeriesfontein was the construction of a specialised wash bay solution at the on-site batch plant; AfriSam has used concrete returns around its readymix plant to pave large areas.
Nearly half of all the office development taking place in South Africa right now is happening in Sandton. Sandton Central is the epicentre of this development, which includes many of the most cutting-edge, exciting and innovation new buildings on the continent.
Menlyn Park Shopping Centre’s R2,5-billion, two-year phased refurbishment has positioned the mall as the dominant super-regional shopping centre in Tshwane.
Discovery’s new head office; Village Walk and Menlyn Park Shopping Centre.