Alkali activation of electric arc furnace slag: Mechanical properties and micro analyzes

Ozturk M., Bankir M. B., Bolukbasi O. S., Sevim U. K.

JOURNAL OF BUILDING ENGINEERING, cilt.21, ss.97-105, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.jobe.2018.10.005
  • Dergi Adı: JOURNAL OF BUILDING ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.97-105
  • Anahtar Kelimeler: Alkali activation, Sodium concentration, Silicate modulus, Electrical arc furnace slag, Micro structure, MICROSTRUCTURE, STRENGTH, CEMENT
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

Research on sustainable concrete has drawn scientist's attentions on industrial by-products and wastes. Thus, consumption of raw materials would be diminished. In this study alkali activation of electric arc furnace slag (EAFS) was studied with a comprehensive test program. Different silicate modulus, sodium concentrations, curing conditions, curing temperatures and relative humidity condition variables were selected. Their effects on mechanical and micro structural behaviors of the mortar were investigated through SEM - XRD analyses. Result of this study, EAFS was activated with sodium hydroxide and sodium silicate solutions. Test results also revealed that increase in relative humidity, curing temperature and curing time had positive effects on strength parameters due to diminishing micro cracks and altering hydration reactions. With the current study utilization of EAFS is thought to be successfully disposed.