In a large residential development by Valumax, bonded standalone houses for private sale and government-funded blocks of RDP flats are going up in the Clayville Ext 45 area near Tembisa, between Pretoria and Ekurhuleni.
Raubex Building has recently completed work on 822 private residential houses, where AfriSam’s readymix concrete was required for the waffle raft foundations under each unit. Between 8m³ and 9m³ of concrete was poured per house, depending on the floor space, which is 45, 52 or 56m² in dimension, according to Raubex Building’s quantity surveyor, Renier Rossouw.
AfriSam delivered about 36m³ of concrete a day, amounting to about 7 000m³ over the full project duration, indicates AfriSam sales manager Adele Wentzel. This was sourced from the company’s Olifantsfontein plant, just 11km from the site, allowing cost and logistical benefits.
The first phase of a government-funded project for RDP flats has also been completed in close proximity to the private housing development. “In February, we handed over eleven three-storey blocks, comprising a total of 237 flats with a 40m² footprint each, to the client,” says Rossouw.
“Here we contracted AfriSam to provide readymix both for the raft foundations – which used 1 100m³ of 20MPa strength concrete – and for the rib and block slabs between the flats, which consumed about 500m³ of the stronger 25MPa concrete.”
A second phase of RDP flats is now underway, also with readymix supplied by AfriSam, and is scheduled for completion by Raubex Building in March 2018. This larger contract is for 484 living units in 18 four-storey blocks.
Reliable readymix supply
Due to the highly structured planning of the work cycle, a reliable supply of readymix is vital, emphasises Rossouw. “As a contractor, you are always constrained by budget and time, so we need partners that deliver as promised,” he says. “We have built a good working relationship with AfriSam over the past four years or so, and have always been impressed by their reliability, as well as the quality of their products.”
Wentzel further points out that the depth of expertise in cement and concrete technology also allows AfriSam to offer support in regard to testing and quality issues. The company can also train customers’ employees on the various procedures to be followed for testing on-site.
On the site itself, there are about 260 workers in this phase, mostly local people trained by Raubex Building. The construction methods are deliberately labour-intensive to allow a high level of job creation and skills development. Local sub-contractors are engaged to provide electrical installations in each residential unit, as well as to install plumbing, glazing and ceilings.
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Raubex Building recently completed the first phase of a government-funded project for RDP flats in Clayville Ext 45.