Abstract
The main objective of this study is to examine the possibility of using fresh basalt powder in the preparation of geopolymer pastes. Four NaOH concentrations of 2.5, 5, 7.5 and 10 M were used to alkali activation of basalt. In addition, effect of curing temperature at ambient, 45°C and 65°C were studied. The geopolymer pastes were investigated using FTIR, XRD and SEM-EDS techniques as well as compressive strength up to 90 days. The results were shown the compressive strength of prepared geopolymer increased with concentration of alkali activator up to 90 days. On the other hand, the compressive strength of prepared geopolymer pastes were improved with increased curing temperature. The results showed that there was a change in the chemical and mineral structure, due to the reaction of the sodium hydroxide with the different minerals of the basalt. In addition, the Na/Al and Si/Al ratios were completely different from that of the raw basalt. The geopolymerization reactions occurred at the surface basalt and the unreacted basalt particles actually play a supporting role in the geopolymer properties.
Highlights
Cement clinker industry is one of the largest industries consuming raw materials and energy in addition to its contribution to many environmental missions [1]
The main objective of this study is to examine the possibility of using fresh basalt powder in the preparation of geopolymer pastes
3-day compressive strength of geopolymer pastes cured at 45 ̊C was increased than that cured at ambient temperature by 50%, 33%, 3% and 28.5% for BS1, BS2 and BS3 pastes, respectively
Summary
Cement clinker industry is one of the largest industries consuming raw materials and energy in addition to its contribution to many environmental missions [1].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
