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POROUS FLY ASH-BASED GEOPOLYMER USABLE AS AN UNCONVENTIONAL CONSTRUCTION MATERIAL


BOGDAN-VALENTIN PAUNESCU 1, LUCIAN PAUNESCU 2*, ENIKO VOLCEANOV 3, 4
1. Consitrans SA, 56 Polona street, Sector 1, Bucharest, 010504, Romania
2. Cosfel Actual SRL, 95-97 Calea Grivitei, Sector 1, Bucharest, 010705, Romania
3. University “Politehnica” of Bucharest, Faculty of Science and Materials Engineering, 313 Independence Splai, Sector 6, Bucharest, 060042, Romania
4. Metallurgical Research Institute SA, 39 Mehadia street, Sector 6, Bucharest, 060543, Romania
* Corresponding author, email: lucianpaunescu16@gmail.com

Issue:

JESR, Number 3, Volume XXIX

Section:

Issue Nr. 3 - Volume 29(2023)

Abstract:

Geopolymer foam with thermal insulation properties was made by foaming the alumino-silicate mixture composed of fly ash and clay brick waste activated with alkaline activator (water glass and sodium hydroxide in aqueous solution). Other mixture components were expanded perlite as siliceous additive, usual fine aggregate (quartz sand), and less frequently used surfactant (olive oil). The main characteristics of the geopolymer foam were: low density, low thermal conductivity, and relatively high compressive strength. The residual materials contributed to low costs and the complete replacement of ordinary cement led to the significant reduction of CO2 emissions.

Keywords:

geopolymer foam, alumino-silicate binder, coal fly ash, hydrogen peroxide, alkaline activator.

Code [ID]:

JESR202303V29S01A0006 [0005596]

Note:

DOI:

Full paper:

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