Kazakhstan based oil & gas companies recover approximately 2,000 to 3,000 metric tons per day of elemental sulfur from their product streams (approximately 500 tons of elemental sulfur is recovered for every 100,000 barrels of extracted petroleum in Kazakhstan). The bulk of the sulfur is recovered by Tengizchevroil (TCO). In Europe and the United States recovered elemental sulfur is normally sold into the chemical and manufacturing market as a raw material for:

  • phosphate fertilizer (50%)

  • sulfuric acid, detergents, and other chemicals

  • metal and fiber industries

  • paint manufacture

  • rubber products

  • paper

  • pharmaceuticals

By-product elemental sulfur can potentially be used as a binder replacement in petroleum asphalt and Portland concrete as sulfur modified asphalt and concrete to meet or exceed American Society for Testing and Materials (ASTM) and/or American Concrete Institute (ACI) standards.

Potential Applications for Sulfur Polymer Concrete & Sulfur Extended Asphalt

Improving the highway infrastructure using sulfur modified concrete and asphalt might be a steady outlet for locally produced elemental sulfur. The sulfur extended asphalt can extend current Kazakhstan asphalt production capabilities by upwards of fifty weight percent (25 volume percent).

Other potential outlets for Kazakhstan produced sulfur include:

  • Sulfur polymer concrete slabs and blocks for construction

  • Sulfur Polymer Stabilization Solidification for radioactive and mercury contaminated materials

Screening-level Ecological Assessment for Sulfur Modified Concrete and Asphalt

The environmental behavior of these sulfur-modified construction materials resembles that of conventional Portland cement concrete and hot mix paving asphalt, except for the possible release of sulfur to the environment.

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