The future wall solution

by Tania Wannenburg
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Lafarge South Africa is continually introducing innovative products that enhance building methods and productivity in the local construction industry. This industry giant is backed by the unparalleled technical strength of its parent company, Lafarge, the world leader in building materials.

One of Lafarge’s groundbreaking products is Agilia®, the first truly self-compacting, self-levelling concrete in the world. The product’s exceptional fluidity enables it to fill all corners and areas in formwork or moulds effortlessly. It offers maximum performance and excellent finishes for demanding construction requirements, while opening up new design possibilities for architects.

Project application
Lafarge Readymix recently supplied Agilia® Vertical for the construction of two facade walls, each approximately six metres high by eight metres wide, at House Bradbury in Bakoven, Cape Town.

Since April 2011, when Mark Bruinders and Brent Paterson of Lafarge had first proposed Agilia® as a solution to the challenging specifications for the walls, extensive discussions had been held with the relevant parties in the project such as Berrisford Construction, Freespace Architects, iCE Group Engineering and Manduka’s Formwork Contractor.   

After evaluating the various building method issues, such as formwork pressures, shutter preparations and pumping procedures, Lafarge recommended Peri-Wiehahn to help with the design and supply of formwork for the job. As a benchmark to rate the finish achieved using Agilia®, it was agreed to compare it with the outstanding off-shutter quality of the Agilia® walls at the Good Hope construction site in Mannenberg.
Manduka’s Formwork erected the formwork for the first wall, which included shutters for two windows, and was tied into two suspended slabs. In September 2011, Lafarge Readymix supplied 10,5m³ of Agilia® Vertical, which was pumped from the bottom up through a valve in the formwork. Although some people on site expressed concern about the hydrostatic pressure on the formwork, everything went according to plan and the pumping of the concrete was completed within approximately 45 minutes.
With renewed confidence, the formwork for the second wall was then erected. This was supposed to be a suspended wall, similar in size to the first one but without windows and tapering to 40mm thick on one side. Shuttering for windows was not required as the glasswork would be installed at a later stage. This wall required 11,5m³ of Agilia® Vertical, which was also pumped successfully from the bottom up in approximately the same time as the first wall.
The client and all the role players in the project were extremely happy with the results and in particular with the excellent finishes that compared well with the Good Hope benchmark.

The Lafarge Readymix team, including the Paarden Eiland Readymix plant staff and Rhuwayda Lalla’s technical team, were congratulated on making this wall project a great success.

Lafarge Industries
Tel: 011 657 0000
Fax: 011 657 1092
E-mail: enquiries@lafarge.com
Website: www.lafarge.co.za

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