Like the elastomer compounds themselves, their formulation is subject to continuous development driven by the implementation of new technologies and alternative raw materials.  In contemporary elastomer compounding, the origin of raw materials, their associated carbon footprint, and their impact on the circular economy of industrial operations have become critical considerations. Among these materials, alternative fillers particularly those derived from secondary, or waste sources are gaining prominence over traditionally used fillers such as carbon black and silica. This study investigates the substitution of conventional carbon black type N550 in rubber formulations intended for conveyor belt applications with an alternative filler obtained from the thermal processing of industrial waste. The research focuses on the mixing process, rheological behaviour, and vulcanisation characteristics of compounds containing carbon-rich residues. Particular attention is given to how the alternative filler influences compound processing and behaviour during vulcanisation, as these factors are critical to both the manufacturing process as well as the final properties of the product.

Acknowledgement: This research work was created within the project „Development of a new elastomeric composite system with specific properties containing two types of alternative fillers based on industrial waste as a complete replacement for the standard carbon black filler - modification of the patented formula (PP 50073-2018)“, code of the project MVP05_2024, based on the financial support from the Internal Grant Scheme of the Alexander Dubček University of Trenčín (Call for proposals: Early Stage Grants), it has been also supported by the Operational Program Integrated Infrastructure, co-financed by the European Regional Development Fund by the project: Advancement and support of R&D for "Centre for diagnostics and quality testing of materials" in the domains of the RIS3 SK specialization, Acronym: CEDITEK II., ITMS2014+ code 313011W442.