MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202611107001 A) filed by Madan Mohan Malaviya University Of Technology on September 05, 2026, for A Sustainable Hot Mix Asphalt (hma) Composition For Pavement Construction.
Inventors include Neeraj Kumar Chaubey; and Arun Kumar Mishra.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: The invention relates to the sustainable use of copper slag (CuS), a by-product of copper production, as a partial replacement for fine natural granite aggregate (NGA) in hot mix asphalt (HMA). Copper slag was incorporated at 0%, 5%, 10%, 15%, 20%, and 25% replacement levels by weight of fine aggregates (4.75–0.075 mm). The Marshall mix design method was used to develop dense-graded HMA mixtures, and the physical, chemical, and mechanical properties of CuS were evaluated. Results showed that while Marshall stability and rutting resistance decreased, the tensile strength ratio (TSR) improved with copper slag addition. All performance values remained within permissible limits. An optimum replacement level of 20% copper slag was identified, providing a balance between mechanical performance, durability, and sustainability. The invention enables environmentally responsible utilization of copper slag in asphalt mixtures, reducing natural resource consumption and supporting sustainable pavement construction.
Disclaimer: Curated by HT Syndication.
