Hello everyone,
This is Syed Sharfuddin and I'm back with my next blog. Today let me fill your brains with some knowledge of Rice husk ash which can be used as an alternative building material.
Rice husk ash is obtained by burning rice husk in a controlled manner without causing environmental pollution. When properly burnt, it has high SiO2 content and can be used as a concrete admixtures. Rice husk ash exhibits high pozzolanic characteristics and contributes to high strength and high impermeability of concrete.
Rice husk ash (RHA) essentially consists of amorphous silica (90% SiO2) , 5% carbon ,2% K2O. The specific surface area of RHA is between 40-100m²/g.
INDIA produces about 122 million ton of paddy every year. Each ton of paddy produces about 40kg of RHA. There is a good potential to make use of RHA as a valuable Pozzolanic material to give almost the same properties as that of microsilica.
USE OF RHA IN CONCRETE BLOCKS
There is a great demand for environmentally safe reuse of rice husk ash thanks to high rate of its generation in India. This is also need of time to develop alternate methods of brick manufacturing in order to reduce the use of fertile soil in brick manufacturing, thus,protecting it for agricultural use. Concrete blocks containing rice husk ash should be promoted as a new construction material to replace the existing blocks in market.
In USA highly pozzolanic rice husk ash is patented under trade name Agrosilica and is marketed. Agrosilica exhibit super pozzolanic property when used in small quantity .i.e. 10% by weight of cement and it greatly enhances the workability and impermeability of concrete.
It is a material of future as concrete admixtures.
Thanks for reading :)
This is Syed Sharfuddin and I'm back with my next blog. Today let me fill your brains with some knowledge of Rice husk ash which can be used as an alternative building material.
Rice husk ash is obtained by burning rice husk in a controlled manner without causing environmental pollution. When properly burnt, it has high SiO2 content and can be used as a concrete admixtures. Rice husk ash exhibits high pozzolanic characteristics and contributes to high strength and high impermeability of concrete.
Dark ballistic aggregates mixed with rice husk ash(RHA) |
INDIA produces about 122 million ton of paddy every year. Each ton of paddy produces about 40kg of RHA. There is a good potential to make use of RHA as a valuable Pozzolanic material to give almost the same properties as that of microsilica.
USE OF RHA IN CONCRETE BLOCKS
There is a great demand for environmentally safe reuse of rice husk ash thanks to high rate of its generation in India. This is also need of time to develop alternate methods of brick manufacturing in order to reduce the use of fertile soil in brick manufacturing, thus,protecting it for agricultural use. Concrete blocks containing rice husk ash should be promoted as a new construction material to replace the existing blocks in market.
Block prepared from rice husk ash |
It is a material of future as concrete admixtures.
Thanks for reading :)