Abstract This paper reports results of strength and reaction products of blast-furnace slag cements activated using a mixture of MgO-NaOH with a ratio 50/50 incorporated at 4, 6 and 8% relative to the slag mass. Pastes and mortars were prepared and cured at 20 °C and 60 °C-24 h-20 °C up to 90 days. The results indicated that the combination of MgO-NaOH acts as an effective alkaline activator of the slag, as samples cured at 20 °C developed 54 MPa at 90 days, while those at 60 °C-24 h-20 °C had a rapid strength gain at early ages but in the long run strengths of ~42 MPa at 90 days were observed. The microstructures consisted of (C-(A)-S-H), third aluminate hydrates and hydrotalcite. The formation of the latter increased at higher MgO:NaOH concentration lowering the Al uptake by C-S-H. MgO and Mg(OH)2 were not detected, indicating an effective incorporation of Mg2+ ions into the atomic structure of the reaction products.

中文翻译：

---

用 MgO-NaOH 反应混合物活化的新型高炉矿渣水泥浆和砂浆的表征

摘要 本文报告了使用比例为 50/50 的 MgO-NaOH 混合物活化的高炉矿渣水泥的强度和反应产物的结果，相对于矿渣质量的比例为 4%、6% 和 8%。在 20 °C 和 60 °C-24 h-20 °C 下制备和固化糊剂和砂浆长达 90 天。结果表明，MgO-NaOH 组合作为渣的有效碱性活化剂，因为在 20 °C 固化的样品在 90 天时达到 54 MPa，而在 60 °C-24 h-20 °C 下固化的样品在早期强度增加，但从长远来看，观察到 90 天时强度约为 42 MPa。微观结构由(C-(A)-SH)、第三铝酸盐水合物和水滑石组成。后者的形成在较高的 MgO:NaOH 浓度下增加，从而降低了 CSH 对铝的吸收。未检测到 MgO 和 Mg(OH)2，