Bending tests on mortar incorporating residues from the heat treatment of industrial waste (rpt)
Research also applies to the reuse of used tires, which may for example be recycled as pellets, incorporated in acoustic undercoats or in lightweight concrete or used as a floor covering for sport rooms or gymkhana rings. At the request of ALIAPUR (an association composed of tire manufacturers and created within the framework of the Manufacturer’s Broadened Responsibility), CSTB has participated in a tire pellet characterization study for the development of synthetic turf. CSTB experts have also been asked to provide help in recycling residues from the heat treatment of waste water treatment plant sludge. "These ashes are mineral materials with properties making them suitable for use in the concrete industry", says Emmanuel Jayr. We can recommend the most relevant reuse application, depending on the characteristics of the material."
Consultancy is the other service offered by CSTB to manufacturers who would like to use or reuse secondary raw materials. "Once the properties of the waste have been characterized, we can suggest ways of reusing it, targeting products into which it could be incorporated: insulation, structural material, etc., states Emmanuel Jayr. We can then assist the manufacturer in the development of a product incorporating the secondary raw material: formulation, technical performances, environmental and health characterizations, economic approach, etc."
The manufacturers involved either stock waste on the input side, or manufacture products on the output side. "We always need to form this pre / post partnership to make sure the industry will be sustainable, and to bring all players into contact with each other, adds the expert. Note that considering the rarefaction of raw materials, the demand is not only from manufacturers. More and more design and engineering offices and owners are asking us to given them lists of products containing recycled waste"
This output side pressure is becoming increasingly strong and is related to the emergence of environmental concerns, and should encourage manufacturers to incorporate more secondary raw materials in their products.