SULPHUR CONCRETE AND SULPHUR INFILTRATED CONCRETE: PROPERTIES, APPLICATIONS AND LIMITATIONS.

Sulfur concrete consists of elemental sulfur, stone and fine aggregates and contains no water or cement. Its high compressive strength makes it ideal for small precast units for outdoor use; its good chemical durability makes it suitable in industrial plants. However, its low melting point at 119 degree C, its vulnerability to combustion and the production of toxic gases, its corrosive effect on reinforcing steel under wet or humid conditions and its brittleness make it unfit for most structural uses. Sulfur-infiltrated concrete is produced by infiltrating conventional portland cement concrete having water to cement ratios of the order of 0. 70, with or without pressure. The infiltrated composite has increased mechanical properties. This concrete is more durable than conventional concretes in acidic environments but is unstable in alkaline solutions and when left submerged in water over long periods.