Patents

A Process for the Production of Geopolymer Cement from Fly Ash and Granulated Blast Furnace Slag, Copolymer Cement Made Thereby and Process of Making Products Thereof

The process for the production of geopolymer cement from fly ash and granulated blast furnace slag uses very high proportion (60 to 95%) of industrial waste such as fly ash and granulated blast furnace slag. In the process granulated blast furnace slag is fine grounded and/or mechanically activated in conventional grinding mills or high-energy mills. The fly ash, which is found in powder form and fine powder of granulated blast furnace slag, is thoroughly mixed with sodium or potassium based alkaline activator and water. The paste is cured at room temperature during which the dissolution of silica and alumina present if fly ash and granulated blast furnace slag starts. After the initial dissolution, the paste is heat treated at the temperature in the range of 60-200 degree C. The process does not require large energy consumption and also produces no CO2 emission. Also the processing steps are simple and easy.

Patent Assignee:

Patent No: IN291555 [India]

Application No: 728/DEL/2006

Inventor(s): Kumar Sanjay; Kumar Rakesh; Mittra Balai Kumar; Mehrotra Surya Pratap

Issue Date: 01-09-2018

Filing Date: 20-03-2006

Implementing institute: National Metallurgical Laboratory (CSIR-NML), Jamshedpur, Jharkhand

Funding agency: Council of Scientific and Industrial Research (CSIR), Government of India

IPC Classification: C04B 28/00

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