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Title |
Strength Development of Blended Sodium Alkali-Activated Ground Granulated Blast-Furnace Slag (GGBS) Mortar
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Keywords |
고로슬래그 ; 수산화나트륨 ; 탄산나트륨 ; 알칼리 품질계수 ground granulated blast-furnace slag ; sodium hydroxide ; sodium carbonate ; alkali-activator |
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Abstract |
Strength model for blasted furnace slag mortar blended with sodium was investigated in this study. The main parameters of AAS (alkali activated slag) mortar were dosage of alkali activator, water to binder ratio (W/B), and aggregate to binder ratio (A/B). For evaluating the property related to the dosage of alkali activator, sodium carbonate (Na2CO3) of 4~8% was added to 4% dosage of sodium hydroxide (NaOH). W/B and A/B was varied 0.45~0.60 and 2.05~2.85, respectively. An alkali quality coefficient combining the amounts of main compositions of source materials and sodium oxide (Na2O) in sodium hydroxide and sodium carbonate is proposed to assess the compressive strength of alkali activated mortars. Test results clearly showed that the compressive strength development of alkali-activated mortars were significantly dependent on the proposed alkali quality coefficient. Compressive strength development of AAS mortars were also estimated using the formula specified in the previous study, which was calibrated using the collected database. Predictions from the simplified equations showed good agreements with the test results.
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