Recycling of Rice Husks Ash for the Preparation of Resistant, Lightweight and Environment-Friendly Fired Bricks

Construction and Building materials 2021
Aleksandr Ketov, Larisa Rudakova, Iakov Vaisman, Iurii Ketov, Viktors Haritonovs, Genādijs Šahmenko

Rice husks ash was previously shown as a raw material for the foamed silicates production. This article is devoted to the use of the foamed silicates as an aggregate for the manufacture of lightweight cellular clay bricks. The coalescence of the foamed silicate structure inside a ceramic matrix leads to obtaining cellular lightweight ce-ramics in the process of firing. The present study has shown that on decreasing the ceramic brick density while using the foamed silicate filler the mechanical strength is not significantly decreased as opposed to the bricks with inert fillers. This effect is explained by obtaining a high trength glass layer on the inside surface of the cells. The lightweight cellular bricks demonstrate good heat insulation properties. Using rice husks ash as a raw for foamed granulated silicates in the manufacture of lightweight ceramic bricks not only solves the problem of rice husks as a large-tonnage waste, but also provides an environment-friendly building material with strength and heat insulation.

Keywords
Rice husks ash, Cellular structure, Foam collapse, Lightweight clay brick
DOI
10.1016/j.conbuildmat.2021.124385
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0950061821021437?via%3Dihub

Ketov, A., Rudakova, L., Vaisman, I., Ketov, I., Haritonovs, V., Šahmenko, G. Recycling of Rice Husks Ash for the Preparation of Resistant, Lightweight and Environment-Friendly Fired Bricks. Construction and Building materials, 2021, Vol. 302, Article number 124385. ISSN 0950-0618. Available from: doi:10.1016/j.conbuildmat.2021.124385

Publication language
English (en)