Development of Alkali-Activated Binders from Recycling Regional Tuff and Marble Wastes

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Tekin İ., Ciza B., Gökçe H.

El-Cezeri Journal of Science and Engineering, vol.10, no.2, pp.371-387, 2023 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 2
  • Publication Date: 2023
  • Doi Number: 10.31202/ecjse.1225457
  • Journal Name: El-Cezeri Journal of Science and Engineering
  • Journal Indexes: Scopus
  • Page Numbers: pp.371-387
  • Keywords: Alkali-activated cements, Ca(OH)2 activator, Marble wastes, Mechanical properties, NaOH activator, Physical properties, Volcanic tuff, Waste disposal, Waste management
  • Dokuz Eylül University Affiliated: Yes

Abstract

The sustainability goals of the developing world have led many industries to recycle their wastes and reduce emitting greenhouse gases. To contribute to these environmental responsibilities, this study has focused on the development of eco-friendly binder materials from regional ground tuff and marble wastes by the activation of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) or slaked lime (Ca(OH)2). The results of this study show that alkali-activated composites experienced expansion, drying shrinkage cracking, leaching, and efflorescence. The compressive strength values of the NaOH and Ca(OH)2-activated pastes reached up to 15 MPa and 9 MPa, respectively. A reduction in NaOH molarity improved the compressive strength, dimensional stability, and durability of tuff-based alkali-activated pastes.