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Mortars of portland cement with 50% of blast furnace slag were alkali activated with 0–10%Na 2 O using waterglass and cured at 10–40°C. The presence of the slag reduced the strength of 0%Na 2 O blends and the alkaline activation with 4%Na 2 O resulted in even lower values; 6%Na 2 O gave similar results as 0%Na 2 O and 10%Na 2 O rendered strengths similar...
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