MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202411103885 A) filed by Center Of Innovative And Bioprocessing on December 27, 2024, for Synthesis Of Lignosulfonate-Based Cement Admixture From Lignin Waste And Applications Thereof.
Inventors include Saswata Goswami; Jayeeta Bhaumik; Anshu Priya; and Yeddula Nikhileshawar Reddy.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: Abstract With the rapid construction industry improvement, high-performance concrete with desired rheological behavior and workability is needed to build structures with superior compressive strength and durability. The major constraint in the production of high-performance concrete is the water content in the concrete mixture. Compressive strength of cement depends on low water to cement ratio; lower water content increases compressive strength, but reduces workability. Less water in cement makes concrete sticky, slows flow, and makes handling harder. Plasticizers and superplasticizers are often added as cement/concrete admixtures for cement particle dispersion to improve workability and compressive strength with low water content. Sulphonated melamine-formaldehyde condensate, sulphonate naphthalene- formaldehyde condensates, polycarboxylic acid, and lignosulfonates are the four main superplasticizers used in cement mixtures. Except for lignosulfonates, fossil- based superplasticizers are expensive and require high dosages. In contrast, lignosulfonates are bio-based, sustainable, and eco-friendly superplasticizers that are cheaper. Lignosulfonates based superplasticizers with superior cement compatibility, water retention, and slump retention will be in high demand for stiff, robust construction with earthquake resistance. Lignin valorization for value-added products has grown in popularity as consumers seek greener options. Due to its many uses, lignosulfonate-based cement additive is becoming more popular. Thus, formaldehyde, and sodium sulfite were used to synthesise lignosulfonate-based cement additive as superplasticizers from lignin waste in good to moderate yield. Bio-based, biodegradable, high performance lignosulfonate-based cement admixtures were made from cheap and abundant lignin waste. To increase dispersion, durability, bending strength, and water retention lignosulfonate-based cement admixture’s physicochemical properties were adjusted. The synthesised lignosulfonate would improve concrete workability and strength as a superplasticizer and water reduction. The production technique is innovative, green, technically possible and circular economy friendly.
Disclaimer: Curated by HT Syndication.
