MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202641017865 A) filed by Vel Tech Rangarajan Dr. Sagunthala R&D Institute Of Science And Technology, Chennai, Tamil Nadu, on Feb. 17, for 'manufacturing of concrete paver blocks using partial replacement of geopolymer aggregate made from industrial waste.'
Inventor(s) include Dr. M. Vinod Kumar; Dr. T. Udhayakumar; and Dr. A. Chithambar Ganesh.
The application for the patent was published on Feb. 27, under issue no. 09/2026.
According to the abstract released by the Intellectual Property India: "The invention relates to sustainable concrete paver blocks using geopolymer aggregate (GPA) manufactured from industrial waste streams. The GPA is produced by alkali activation of aluminosilicate precursors including fly ash, ground granulated blast-furnace slag (GGBS), and silica fume using sodium hydroxide and sodium silicate, followed by casting the fresh geopolymer mix into molded bodies, curing to form a hardened geopolymeric matrix, and crushing to obtain a nominal 20 mm graded aggregate. Concrete paver blocks are then manufactured by partially replacing conventional 20 mm coarse aggregate with the GPA, preferably at about 50% by mass, and molding/compacting by vibration and/or pressing followed by controlled curing. The resulting paver blocks provide a favorable balance of compressive strength, density, and water absorption suitable for paving applications while reducing dependence on natural aggregates and enabling beneficial utilization of industrial by-products."
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