BUILDING: Can This Be Child's Play
Recent Western Cape Business News
The new blocks have certain special features; they are fireproof and exceptionally strong (with a 7Mpa rating). They also have excellent insulating properties, making it possible to use them in the construction of cold rooms at a 50% lower cost, Esterhuizen claims.
He says the blocks are ideally suited to the building of any structure that requires additional insulation – chicken pens, soundproof rooms and cold rooms. “Using them, it is possible to soundproof a studio at a fraction of the usual cost or to build internal walls without extra foundations. Their thermal properties make them suitable for large factories, especially those involved in food handling.”
The blocks will enable relatively unskilled block layers to construct the walls of quality thermal homes in 20% of the time required in the laying of conventional blocks,” he says.
“Perlite blocks,” he says, “will be warm in winter and cool in summer, and will need only a fraction of the electricity required in conventional block or brick built homes.”
The light weight of the Perlite blocks (6kg) again makes them ideal for the DIY operator as they help eliminate or reduce the need for scaffolding.
Another advantage of the new blocks is that the design makes it possible to install all services in the cavities – there is no need to cut or grind walls.
Complementing the Stumbelbloc system is Blockgrip, a product developed by Technical Finishes. This is a fast curing thin-bed mortar ‘glue’ into which the blocks are dipped to create a bond between them. 1kg of concentrate mixed up with 50kg of OPC cement and one wheelbarrow of dry plaster sand will produce sufficient ‘glue’ for 600 blocks at a cost of 31 cents per block. The thin bed mortar ‘glue’ bonds the blocks together quicker and stronger than conventional mortar (dagha).
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