The development of fully integrated building materials supply and management solutions by Lafarge South Africa focuses strongly on the needs of its construction contractor customers and their projects. The approach is proving to be highly effective, offering customers both peace of mind and better value in a competitive marketplace. The company is in a unique position to meet the needs of the construction industry through having a strong presence in all of its construction related business lines of cement, aggregates, ready-mixed concrete and fly ash.
Lafarge South Africa is a member of the LafargeHolcim group, the world leader in the building materials industry. With its commitment to drive sustainable solutions for better building and infrastructure, and to contribute to a higher quality of life, the Group is best positioned to meet the challenges of increasing urbanisation. In South Africa, the emphasis is on building better communities by contributing to solutions for decent housing, hospitals, schools and offices, together with the associated infrastructure to connect and service cities, such as roads, airports, as well as water and power utilities.
Key supplier for Eteza interchange
An efficient integrated service package is being supplied by Lafarge South Africa for the SANRAL contract to construct an overload control facility and full diamond interchange at Eteza on the N2 in KwaZulu-Natal. Construction began in October 2014 and is scheduled for completion in January 2017.
The motivation for the project, which is approximately 20 km from Richards Bay, was to provide a vehicle management facility that would take overloaded vehicles off the road and create a safer environment for all road users. The normal lifespan of a freeway is 30 years but overloaded heavy vehicles travelling to and from the local port can reduce the usable life by over a third because of accelerated deterioration of the pavement.
The project raised two main concrete issues: the first being to place the Continuous Reinforced Concrete Pavement (CRCP) on time and within specification when the closest commercial ready-mixed concrete plant was 45 km from the project site. The second concern was ameliorating the Heat of Hydration (HOH) in the extremely hot, humid conditions.
Lafarge South Africa's successful offer to supply all main building materials, concrete, cement, fly ash, and 165 000 tons of road aggregates, as well as 4 500 tons of the company's specialised cementitious roadbinder, RoadCem 32,5 N, made it viable to provide a Lafarge mobile concrete batching plant on site. This will enable the required combined total of 13 000 m³ of CRCP mix and other Conventionally Vibrated Concrete (CVC) to be supplied without compromising the quality or integrity of the concrete.
The solution for assisting with the control of HOH is the supply of 6 500 tons of Lafarge's Powercrete Plus CEM II 42,5 R premium technical cement. This unique product is not only a Low Heat Cement with a typical HOH value of 227 J/g (compared with the EN 197-1 criterion of < 270 J/g at 41h), but it can also be extended further on site with fly ash to meet the various mix requirements.
Taking responsibility for durability
Lafarge South Africa is providing similar support for the ongoing SANRAL contract to upgrade Section 14 of the N1 freeway between the Trompsburg Interchange and Fonteintjie, a distance of 20,8 km. The existing pavement had deteriorated badly and, instead of a normal pavement upgrade, it was decided to build a greenfield carriageway. However, it is an extremely busy section of freeway, involving bridges and many other structures. Another challenge was the fact that the site is some 120 km from the nearest fixed commercial ready-mixed concrete plant and this represented a potentially significant risk in terms of compliance with the tight durability specification.
The solution from Lafarge South Africa was to position a mobile concrete batching plant optimally on site to service the major concrete pours and take on the durability risk. This was conditional on being awarded the full supply package of building materials. The successful outcome was the contract to supply of 10 000 m³ CVC concrete, on-specification and on-time. This involves supplying 3 500 tons of Lafarge Powercrete Plus 42,5R cement, 7 000 tons of aggregates, 1 000 tons of fly ash, as well as 8 000 tons of the cementitious roadbinder, RoadCem.
The project started in October 2014 and has a scheduled duration of 24 months.
"Our construction contractor customers are appreciating the benefits of having their building materials supplied and managed from a single reliable source," comments Unathi Batyashe-Fillis, Lafarge South Africa's Country Communications Manager. "By matching the extensive capabilities of Lafarge South Africa with the needs of the specific construction project and the individual construction company, we achieve consistent quality and better value all round for the stakeholders."
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With a well-balanced presence in 90 countries and a focus on Cement, Aggregates and Concrete, LafargeHolcim (SIX Swiss Exchange, Euronext Paris: LHN) is the world leader in the building materials industry. The Group has 115,000 employees around the world and combined net sales of CHF 33 billion (EUR 27 billion) in 2014. LafargeHolcim is the industry benchmark in R&D and serves from the individual homebuilder to the largest and most complex project with the widest range of value-adding products, innovative services and comprehensive building solutions. With a commitment to drive sustainable solutions for better building and infrastructure and to contribute to a higher quality of life, the Group is best positioned to meet the challenges of increasing urbanisation. More information is available on www.lafargeholcim.com
About Lafarge South Africa
Lafarge South Africa, a member of the LafargeHolcim group, manufactures and supplies cement, aggregates and readymixed concrete, fly ash, gypsum plasterboard and interior building fittings through its various business units. It focuses on providing solutions to help the sustainable development of better cities that benefit the country's people. Through having a strong presence in all of its business lines, it is in a unique position to contribute to urban construction, while also helping to build better cities, rural towns and villages. For further information, visit our website on: www.lafarge.co.za
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Tel: +2711 657 1109