Now, bricks from ‘waste’ sand

Think twice before dismissing something as ‘waste’. It could be the building block for something useful.

Tonnes of waste foundry mould sand generated at the State Government undertaking Autokast Ltd will now be turned into bricks for the construction sector, courtesy a technique developed by the CSIR-National Institute for Interdisciplinary Science and Technology (NIIST) at Pappanamcode here.

Autokast managing director Prasad Mathew and NIIST director A. Ajayaghosh signed an agreement for transfer of the know-how to Autokast in the presence of Industries Minister P. Rajeeve on Thursday. This eco-friendly technology can benefit housing schemes such as the Government-sponsored LIFE Mission.

Cherthala-based Autokast, which manufactures ferrous castings components, generates 600 to 700 tonnes of foundry waste sand every month. Only a fraction of it could be reused, Autokast officials said. The rest would be discarded as waste.

NIIST developed the technology to make bricks from the silica sand through a simple, cement-bonded compression moulding technique, Dr. S. Ananthakumar, Chief Scientist, Ceramics Activity Materials Science and Technology Division at NIIST, who headed the project, said.

Under the agreement, NIIST will transfer the know-how to Autokast where both the institutions will set up a brick manufacturing plant, designed to produce 4,000 bricks per day.

The cement bonding and compression moulding technique can produce high-strength bricks that meet the IS 1077 standards, according to NIIST scientists. They can also be produced in aesthetically appealing colours to suit interior designing requirements.

The project was undertaken as part of the ‘Waste to Wealth’ research programme of the Council of Scientific and Industrial Research (CSIR).

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Printable version | Nov 27, 2021 3:18:21 PM |

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