Assess the Effects of the Ratio of Na2O Solid Oxide to Electric Arc Furnace Slag as a Binder on the Physical and Mechanical Characteristics of Alkali Activated MortarsPages 273-287
Hana Abd Alftah Aljewifi Abstract:
The purpose of the study is to reduce environmental impacts and advance sustainability through the use of electric arc furnace slag. The experimental results focus on using EAF slag to replace a portion of cement. The percentages of partial replacement are 0%, 5%, 10%, 15%, 30%, 60%, 80%, and 100%. NaOH concentrations of 2M, 4M, 6M, and 8M were employed, along with a (R=Na2SiO3/NaOH) of 0.5-1.5. Physical characteristics of the pastes, including fresh density and flow test. The effects of alkaline-activated solutions (AAS) on compression and flexural behavior strength have also been investigated after a 28-day drying process in dry air at 30°C. The optimal ratio might be thought of as 15% EAF slag. The results show that a higher Na2O content results in a higher density, a lower compressive strength, and less workability. Results showed that mixes with NH molarities of 2M, 4M, and EAF slag concentrations of 5, 10%, and 15%, respectively, could attain 28-day compressive strengths of up to about 30MPa. However, higher R led to the development of more solid oxides, which reduced mortar performance. When the molarity reaches 4M, the EAF slag ratio of greater than 15% has no discernible effect on the compressive and flexural strength.
Keywords: Electric arc furnace slag,
Alkali activators,
Hydration process,
Compressive strength,
Flexural strength
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