Tag Archivesconcrete

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THE ROLE OF SYNTHETIC FIBRES IN CONCRETE

Deficiency in tension in both plastic and  hardened concrete made with portland cement can be overcome by the use of conventional rod reinforcement and the inclusion of a sufficient volume of certain fibres. While synthetic fibres can be used to improve the strength of hardened concrete, it is primarily used for crack control in plastic […]

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LAFARGE LAUNCHES SUPASET, AN INNOVATIVE SOLUTION FOR POLE SETTING

SupaSet, a remarkable ready-to-use product for quickly setting poles in position has been launched by Lafarge South Africa, the local presence of the international Lafarge Group, the world leader in building materials. A first of its kind in our market, SupaSet takes only 10-15 minutes to set compared with up to 2 days for a […]

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SAICE ACCREDITS UNIQUE AFRISAM COURSE WITH CPD POINTS

A course on good concrete practices and cement manufacturing devised by AfriSam has been qualified by the South African Institute of Civil Engineers (SAICE) to be presented as part of its CPD (Continuous Personal Development) initiative. The new course was reviewed by an external academic and accredited with 0.4 CPD points. Mike McDonald, AfriSam product […]

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PRECAST CONCRETE PREDOMINATES AT ‘THE WILLIAM’

Prestressed hollow-core slabs and concrete staircases are some of the precast concrete elements being used to construct 110 eight-unit apartment blocks at The William, a middle-income high-density residential development currently being constructed by Balwin Properties in northern Johannesburg. Other precast concrete products being used include bricks, paving blocks, retaining wall blocks, L beams and lintels. […]

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MUCH-MALIGNED CONCRETE HAS ‘EXCELLENT ECOLOGICAL PROFILE’

Concrete and cement are often unfairly blamed for unacceptably high carbon-dioxide emissions, says Bryan Perrie, MD of The Concrete Institute. Perrie says the current average worldwide consumption of concrete is about a ton per year for every living person. “Notwithstanding this extensive use, the global cement  industry still accounts for only about 5% of man-made […]

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Proper curing vital to achieve concrete’s full potential, says The Concrete Institute

All newly-cast concrete must be cured to ensure that hydration continues until the full potential strength of the hardened concrete is achieved and to minimise the tendency to crack, advises Bryan Perrie, MD of The Concrete Institute. “This means ensuring that the concrete is prevented from drying out and at a temperature that allows cementing […]

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Imported cement offers no advantage

Concrete manufacturers should think again before buying cut-price imported cement as it offers little if any advantage in the marketplace and contributes nothing towards our local economy. So said Grant Neser of Afrisam, in an address to the South African Readymix Association (Sarma), at its annual conference held in Broederstroom recently. He added that any […]

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Concrete, the liquid stone of the 21st century

In his university days, PPC’s newly appointed Architectural Concrete Specialist, Daniel van der Merwe, shared the common perception that concrete was ‘dull and boring’, being a mere construction material. Today, this perception among architects and other key decision makers has changed and they are fast finding alternate uses for the mere construction material. “The use […]

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Ash Resources provides the key to green engineering

Ash Resources introduced the ‘green’ into South African concrete over thirty years ago.  Since then, the company’s fly ash products have made an increasingly important impact on the ‘greening’ of our houses, shopping malls, dams, harbours, bridges – in fact the construction industry as a whole. Each ton of fly ash used in a cement […]

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CBP USED IN SHOVAGAKULA PAVING PROJECT

Precast concrete block pavers (CBP) and kerbing have been used to construct safe, attractive and durable pavements in Olievenhoutbosch Ext 36, for both pedestrians and cyclists. Known as the City of Tshwane’s Shovagakula (Easy) Paving Project, it is being run over three years in several phases and aims to encourage the use of bicycles in […]

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