混合硫酸盐激活地面颗粒高炉渣泥混凝土的阶段演变

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Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

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Juan Manuel Etcheverry¹, Zengliang Yue², Sreejith Krishnan²

¹Magnel-Vandepitte Laboratory for Structural Engineering and Building Materials, Ghent University, Technologiepark-Zwijnaarde 60, 9052 Ghent, Belgium.

ACS sustainable chemistry & engineering

|February 5, 2024

概括

硫酸在含有磨砂颗粒高炉渣 (GGBFS) 和波特兰水泥 (PC) 的混合水泥中加速反应. 这提高了早期的性能,而不会改变最终的反应产品,有助于减少化物因素的水泥开发.

科学领域:

材料科学材料科学材料科学
土木工程土木工程是指土木工程.
地质化学地质化学

背景情况:

波特兰水泥 (PC) 生产具有显著的碳足迹.
地质颗粒高炉渣 (GGBFS) 是一种补充性水泥材料,可以降低PC含量.
活性粘合剂为可持续建筑材料提供了潜力.

研究的目的:

为了研究硫酸激活对混合GGBFS/PC水泥的水化动力学和相位发展的影响.
为了比较激活和非激活混合水泥系统的性能.
评估开发具有减少结因子的水泥的潜力.

主要方法:

用70%的GGBFS和30%的PC制备混合水泥.
使用硫酸激活.
与未激活的混合系统进行比较.
使用各种表征技术分析反应动力学,相组合和产品形成.

主要成果:

硫酸显著增加了反应动力学和反应的程度,特别是在早期 (2天).
主要反应产物是替代酸水合物 (C-A-S-H) 凝,在C-A-S-H阶段观察到硫吸附.
其次阶段,如埃特灵石和分层的双氧化物,根据固化年龄和激活而形成.
在较晚的固化年龄下,没有观察到整体相组合的显著变化.

结论:

硫酸有效地加速了高GGBFS混合水泥中的相位演变.
激活增强了早期的反应活性,而不会显著改变最终的反应产品.
这种方法是朝着开发具有减少基含量的可持续水泥迈出的有希望的一步.

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