The market for processed builders’ rubble in South Africa is growing and architects, engineers and the rest of the building industry should take note. When Dr Kirsten Barnes, waste economy analyst from GreenCape, started investigating a builders’ rubble market, the perception existed that the material was rubbish and that she was wasting her time. This […]
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As one of the most widely used materials on the planet, concrete presents an ideal opportunity for the industry to minimise its environmental impact. At the Loeriesfontein Wind Farm, the amount of activator used was reduced to 0.4%, or four litres of activator per cubic metre of concrete. Image credit: Loeriesfontein Wind Farm Concrete is […]
One cubic metre of concrete has a carbon footprint of 350kg of CO2, making this staple material in the construction industry one of the biggest contributors to greenhouse gases in the world. This fact was shared by Cyril Attwell, researcher and director at ARC Projects, at this year’s annual GBCSA Green Building Convention. Attwell, however, […]
Addendum A features a study conducted by Cyril N. Atwell that explores the distinct advantages of hybrid concrete based on results gathered from practical application of the products in three separate construction sites in Southern Africa since 2010. These advantages include: Lower costs environmentally. Lower costs economically. Better abrasion resistance. Lower heat of hydration. Crystalline […]
With using ARC technology, Murray & Roberts were able to use a water with high sulphates and nitrates as mixing water for the concrete. This water would have been considered inadequate as it is not potable and the water would have to have been transported from approximately 100km away from site, Loeriesfontein is in the […]
On September 13, 2013, the first commercial and industrial 0% Portland cement concrete was cast in South Africa at the Transnet City Deep Container Terminal. Three large test sections were cast to review the longer-term durability, compressive strengths and abrasion resistance. The 0% Portland cement exceeded all specifications and out-performed the Portland cement concrete. The […]
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