Rice husk ash (RHA), rich in silica content, can be produced from rice husk using appropriate combustion technique for use in concrete as a supplementary cementitious material. This paper discusses production process of RHA from rice husk and the quality of RHA produced using rudimentary furnace ...
Brisil produces precipitated silica and highly dispersible silica using biomass (rice husk ash & others) for tires, rubber products, paint, toothpaste, footwear, food and other industries.
silica extractionRice husk ashThe motivation for this study was to find a possible economic alternative for the residual Rice Husk Ash (RHA) as well as a way to mitigate the growing environmental problem in Southern Brazil (illegal deposition of exceeding rice husks and RHA). For this, an ...
The objective of the present work is to develop a procedure for obtaining and characterization active silica with a high specific surface area from rice husk ash. The relative amount of silica was increased after burning out the carbonaceous material at different times and temperatures. A 95% sili...
white rice husk ashmechanical propertiesThe potential of using white rice husk ash (WRHA) to partially replace the silica content in silica filled natural rubber vulcanizates was studied. Results show that the optimum weight ratio of WRHA/silica to obtain maximum enhancement of tensile and tear ...
In this work a complete characterization of rice husk ash (RHA) was conducted in order to evaluate mainly the composition and the thermal reactivity in terms of crystalline phase evolution. Moreover, the screening results of the research conducted on the possibility to use RHA as silica precursor...
Sulfonated rice husk ash (RHA-SO3H), a newly reported solid acid catalyst, was efficiently used for the synthesis of 4,4′-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols), 3,3′-(arylmethylene)-bis-(4-hydroxycoumarins) and bis(indolyl)methanes. The procedure gave the products...
Statically compacted soil specimens have been prepared at optimum moisture content and maximum dry density by adding 4, 8, 12, 16 and 20% by weight of rice husk ash to the parent soil. Specimens have been subjected to increments of vertical pressure of 0.25, 0.50, 1.00, 2.00 and 4.00 kg...
On the other hand, rice is one of the most important food crops generating around 22% in weight of husk during its milling, a material that is mainly used as fuel for energy generation, resulting in ash. Rice husk ash (RHA) contains over 70% of silica in amorphous form. In this ...
Rice husk is one of the most silica rich raw materials containing about 90-98% silica. Rice husk large ash content and sodium silicate content in the ash it becomes economical to extract silica from the rice husk ash, which has wide market and also takes care of ash disposal. Rice husk ...