An investigation of resistance of sodium meta silicate activated slag mortar to acidic and basic mediums

  • Şinasi Bingöl Tokat Gaziosmanpaşa University (Turkey). Engineering and Architecture Faculty, Department of Civil Engineering
  • Cahit Bilim Mersin University (Turkey). Engineering Faculty, Department of Civil Engineering
  • Cengiz Duran Atiş Erciyes University (Turkey). Civil Engineering Department
  • Uğur Durak Erciyes University (Turkey). Civil Engineering Department
  • Serhan İlkentapar Erciyes University (Turkey). Civil Engineering Department
  • Okan Karahan Erciyes University (Turkey). Civil Engineering Department

Abstract

This study presents the resistance of sodium meta-silicate activated ground granulated blast furnace slag (GGBFS) to acidic and basic mediums. Geopolymer mortars were prepared with GGBFS activated by sodium meta-silicate activator having 4, 8, and 12% sodium concentrations by mass of slag. These mortars were exposed to two types of acid solutions, H2SO4 and HCl with a 5% concentration of acid-water solution. Similarly, some specimens were exposed to a basic medium composed of 25% NaOH solution with water. Exposure time for the acidic and basic mediums was set to one year. Comparison of results obtained from slag based geopolymer mortar was made with normal Portland cement control mortar. Normal control samples lost compressive strength significantly after exposure to acidic and basic medium in comparison to alkali activated slag mortar. Particularly, after exposure to H2SO4, the compressive strength of the normal control samples decreased by about 40%. Contrary to this, the slag based geopolymer mortar gained compressive strength after exposure to the acidic or basic mediums. An up to 21% strength increase was observed from the alkali activated slag mixtures made with 4% and 8% Na content.


 


 


 

Author Biographies

Şinasi Bingöl, Tokat Gaziosmanpaşa University (Turkey). Engineering and Architecture Faculty, Department of Civil Engineering

 

 

 

Cahit Bilim, Mersin University (Turkey). Engineering Faculty, Department of Civil Engineering

 

 

Cengiz Duran Atiş, Erciyes University (Turkey). Civil Engineering Department

 

 

 

Uğur Durak, Erciyes University (Turkey). Civil Engineering Department

 

 

 

Serhan İlkentapar, Erciyes University (Turkey). Civil Engineering Department

 

 

 

Okan Karahan, Erciyes University (Turkey). Civil Engineering Department

 

 

Published
2020-04-29
How to Cite
BINGÖL, Şinasi et al. An investigation of resistance of sodium meta silicate activated slag mortar to acidic and basic mediums. Journal of Construction, [S.l.], v. 19, n. 1, p. 127-133, apr. 2020. ISSN 0718-915X. Available at: <http://ojs.uc.cl/index.php/RDLC/article/view/12324>. Date accessed: 01 june 2020. doi: https://doi.org/10.7764/RDLC.19.1.127-133.