In a housing industry that is desperate for high quality, robust and affordable properties, state-of-the-art setting up technology frontrunner, Sanjo Fabtech Sterling has been collaborating with building products chief, AfriSam, to deliver just that in Thembisa.
At the coronary heart of the 500 unit, rapidly tracked housing venture is Sanjo Fabtech Sterling’s advanced, light-weight wall technological innovation, delivering good four-storey ‘walk-up’ residential buildings that will be ready by mid-yr. According to Jonathan Peel, director at Sanjo Fabtech Sterling, the walling systems utilized in Thembisa have lately also been utilized in upmarket Sandton flats and hotel projects.
AfriSam is providing an ground breaking light-weight readymix remedy designed and formulated by Sanjo Fabtech Sterling’s sister firm, SanteQ Liteweight Building Technology, for the Thembisa project. The lightweight concrete mix styles combine recycled polystyrene with SanteQ’s specialised concrete mixes.
The readymix infill for the walling procedure is equipped by AfriSam and pumped into the void among the fibre cement boards which functions as everlasting formwork. The polystyrene results in mechanical air bubbles, lowering the bodyweight of the walls by 50 to 75% when in comparison to regular masonry materials, and supplying unique layout and engineering positive aspects.
“Due to dolomitic soil situations in the Thembisa space, the bodyweight gain of the walls significantly diminished the design and style of the raft foundation.” states Peel. “Despite their lighter excess weight, the partitions are as reliable as brick and mortar, move the ‘knock test’ and give improved seem and thermal insulation.”
“Delivering from our nearby Olifantsfontein plant, we could provide Sanjo Fabtech Sterling with 48 to 102 cubic metres a day of their unique blend in our readymix vehicles,” claimed Luigi van der Made, AfriSam’s readymix functions supervisor. “Using 4 of our 6 cubic metre capability readymix trucks, we had been ready to increase the polystyrene on site and develop a homogenised combine.”
The special lightweight concrete blend – which does not use coarse aggregate – consists of high-quality and coarse sands as perfectly as fly ash with the cement. CHRYSO® Omega 140 AFR ZA, a significant array, drinking water minimizing plasticiser is also provided to raise the slump though minimizing the drinking water prerequisite.
“Keeping a constant offer flowing with four committed readymix vans, we ensured that the mix remained steady, workable and cost-efficient,” says van der Built. “The closing infill combination was then be pumped into the partitions, rushing up the design method.”
He notes that the process experienced to be closely managed to prevent residual polystyrene in the readymix vans from contaminating any other approach back at the plant. This demanded a watchful cleaning system, which also integrated a recycling circuit to independent the polystyrene and return it to SanteQ for recycling.