Intellectual Property India Publishes Patent Application for Recycled Aggregate Geopolymer Concrete Product Development (combined Use Of Recycled Aggregate, Fly Ash, Ggbs, And Red Mud) And Mix Design Procedure.

MUMBAI, India, July 7 -- Intellectual Property India has published a patent application (202531007452 A) filed by Indian Institute Of Technology on January 29, 2025, for Recycled Aggregate Geopolymer Concrete Product Development (combined Use Of Recycled Aggregate, Fly Ash, Ggbs, And Red Mud) And Mix Design Procedure..

Inventors include Dr. Banoth Gopalakrishna; and Dr. Dinakar Pasla.

The application for the patent was published on July 03, 2026, under issue no. 27/2026.

Abstract: Abstract Title: Recycled aggregate Geopolymer concrete Product Development (Combined use of recycled aggregate, Fly ash, GGBS, and Red Mud) and Mix Design Procedure. The present invention discloses development of medium to high strength recycled aggregate geopolymer concrete mixes with the combination of fly ash, GGBS, and iron-rich red mud, in the proportions of 60-65%, 30-40%, 10-15% and 100% recycled aggregate respectively establishing a new relationship between 28th day compressive strength and AAC to binder material ratios is also part of the invention. This study accentuates the minimum usage of red mud to 10%, the largest percentage usage red mud in a single application. The 100% recycled aggregate used in recycled aggregate geopolymer concrete. The invention is also novel due to the user-friendly nature (user can choose either strength or AAC/binder ratio) and easy to follow steps of mix design for producing recycled aggregate geopolymer concretes using Indian red mud (has very high iron content), class F fly ash, and GGBS (to avoid heat curing as well as to improve the strength property) and recycled aggregate. The highlight feature of this invention is that it considers the specific gravities along with the combined grading to produce medium to high strength concrete using industrial wastes such as recycled aggregate, fly ash, red mud, and GGBS, in tandem. The developed green recycled aggregate geopolymer concrete with strength as high as 67 MPa on 28th day by purely using the industrial waste of recycled aggregate fly ash, red mud, and GGBS. Also, the mix design proposed is more scientific and holistic in approach rather than merely resorting to trial and error approach, which most of the existing methods follow.

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