Sulphur concrete walls
• The ingredients of sulphur concrete are elemental sulphur, send end a plasticizer. Sulphur concrete remains unaffected by impurities, such as salts, which are harmful to reinforced cement concrete.
• The most appropriate use of sulphur concrete for walls is to make hollow blocks, especially interlocking blocks, which can be assembled with great speed and accuracy.
• Block production requires some skill and experience in the use of sulphur, as the molten sulphur hardens quickly. Because of the short curing time, only few moulds are required. Any broken blocks can be remelted and recycled.
• The illustrations overleaf show a practical example of interlocking sulphur concrete block walls in Dubai, United Arab Emirates. The blocks were based on the LOK BLOK system developed by Professor Bruce Etherington (see LOK BILD System) and adapted to sulphur concrete by Bernard Lefebvre.
Further information: Alvaro Ortega, Research Consultant, 3460 Peel Street, Apt. 811, Montreal P.Q., Canada; Bibl. 18.06, 18.07.
Sulphur Concrete Block Walls in Dubai, United Arab Emirates (Photos: A. Ortega)
• The interlocking blocks are quickly assembled without mortar.
• The smooth, non-absorbing marble-like surfaces eliminate the need for plastering or painting, and can easily be cleaned by washing with plain water.
• Depending on the aggregates, different coloured blocks can be made, producing attractive wall surfaces.
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