MUMBAI, India, Feb. 27 -- Intellectual Property India has published a patent application (202641016997 A) filed by Sri Krishna College Of Engineering And Technology, Coimbatore, Tamil Nadu, on Feb. 16, for 'an optimized leca-based lightweight concrete for structural and sustainable construction applications.'

Inventor(s) include Dr. P. Subashree; Santhoshkumar B; Shenbagamoorthi A; Abdul Raheem J; and Murali Prasath M.

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: "An Optimized LECA-Based Lightweight Concrete for Structural and Sustainable Construction Applications The present invention relates to an optimized Lightweight Expanded Clay Aggregate (LECA) based lightweight concrete suitable for structural and sustainable construction. The concrete comprises cement, fine aggregate, water, conventional coarse aggregate, and LECA, wherein the LECA partially replaces the coarse aggregate in the range of about 5% to 15% by volume. The invention achieves a significant reduction in density and self-weight while maintaining mechanical properties suitable for M25 grade structural concrete. The porous structure of LECA contributes to improved thermal and acoustic insulation, making the concrete suitable for energy-efficient buildings. In one embodiment, pre-soaked or surface-treated LECA is used to control water absorption and enhance bonding with the cement matrix. Experimental evaluation demonstrates that an optimized replacement range of about 5% to 10% provides an effective balance between weight reduction and strength. The invention is applicable to structural, precast, and seismic-resistant construction systems."

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