MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202611100614 A) filed by Madan Mohan Malaviya University Of Technology on August 20, 2026, for Sustainable Hot Mix Asphalt Using Reclaimed Asphalt Pavement Without Rejuvenator.
Inventors include Chitransha Chandra; and Arun Kumar Mishra.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: The present invention relates to a sustainable Hot Mix Asphalt (HMA) composition incorporating Reclaimed Asphalt Pavement (RAP) as a substitute for virgin aggregates in flexible pavement layers, produced entirely without chemical rejuvenating agents. The composition comprises a mineral aggregate blend containing 25% to 60% RAP by total weight of the aggregate blend and 40% to 75% virgin aggregate, combined with virgin bitumen binder added at an Optimum Binder Content (OBC) ranging from 2.95% to 4.05% by total weight of the mix. The mix design conforms to Dense Bituminous Macadam Grade-II (DBM-II) gradation requirements under MoRTH specifications. By leveraging the alkaline surface character (?"CaO/SiO" ?_2 ratio of approximately 0.30) and dual-layer morphology of the RAP aggregate, the HMA mix achieves superior Marshall stability, cracking resistance (ITS), and moisture durability (TSR) without relying on chemical additives or bio- rejuvenators. The invention further provides a method for preparing the rejuvenator-free high-RAP hot mix asphalt.
Disclaimer: Curated by HT Syndication.
