Characterization of an aged alkali-activated slag roof tile after 30 years of exposure to Northern Scandinavian weather.
Characterization of an aged alkali-activated slag roof tile after 30 years of exposure to Northern Scandinavian weather.
复制标题
作者：
120 多年来，碱活化材料 (AAM) 一直被认为是建筑领域的替代水泥基粘合剂。 20 世纪 50 年代至 80 年代，欧洲建成了多座采用 AAM 的建筑。在过去 30 年中，由于与波特兰水泥相比，AAM 的二氧化碳足迹可能更低，因此人们对 AAM 的兴趣重新燃起。然而，AAM 经常提出的一个问题是缺乏有关现实条件下耐久性的长期研究。在本研究中，我们检查了一种屋顶瓦，该屋顶瓦由碱活化高炉矿渣砂浆制成，并在芬兰图尔库暴露于北斯堪的纳维亚半岛恶劣的天气条件下约 30 年。这种屋顶瓦的表征提供了有关 AAM 生命周期内发生的变化的独特而重要的信息。通过一系列分析技术获得的结果表明，屋顶瓦保持了优异的耐久性能，在现实生活实验室条件下几乎没有结构解体的迹象，从而在一定程度上保证了基于 AAM 的粘合剂可以在恶劣的气候下安全使用。这里报告的相组装和纳米结构表征结果进一步阐明了 AAM 中发生的长期变化，并为加速耐久性测试和热力学建模提供参考点。本文报道的相组合和纳米结构表征结果进一步阐明了碱活化高炉矿渣粘合剂中发生的长期变化。
Alkali-activated materials (AAMs) have been known as an alternative cementitious binder in construction for more than 120 years. Several buildings utilizing AAMs were realized in Europe in the 1950s–1980s. During the last 30 years, the interest towards AAMs has been reinvigorated due to the potentially lower CO2 footprint in comparison to Portland cement. However, one often-raised issue with AAMs is the lack of long-term studies concerning durability in realistic conditions. In the present study, we examined a roof tile, which was prepared from alkali-activated blast furnace slag mortar and exposed to harsh Northern Scandinavian weather conditions in Turku, Finland, for approximately 30 years. Characterization of this roof tile provides unique and crucial information about the changes occurring during AAM lifetime. The results obtained with a suite of analytical techniques indicate that the roof tile had maintained excellent durability properties with little sign of structural disintegration in real-life living lab conditions, and thus provide in part assurance that AAM-based binders can be safely adopted in harsh climates. The phase assemblage and nanostructural characterization results reported here further elucidate the long-term changes occurring in AAMs and provide reference points for accelerated durability tests and thermodynamic modelling. The phase assemblage and nanostructural characterization results reported here further elucidate the long-term changes occurring in alkali activated blast furnace slag binders.
登录
查看更多内容
影响因子：
11.4
作者：
Bernal, Susan A.;Provis, John L.;van Deventer, Jannie S. J.
通讯作者：
van Deventer, Jannie S. J.
影响因子：
4.6
作者：
Bernal, Susan A.;Rose, Volker;Provis, John L.
通讯作者：
Provis, John L.
影响因子：
2
作者：
De Choudens-Sanchez, Vionette;Gonzalez, Luis A.
通讯作者：
Gonzalez, Luis A.
影响因子：
3.8
作者：
Gluth, Gregor J. G.;Arbi, Kamel;Provis, John L.
通讯作者：
Provis, John L.
影响因子：
11.4
作者：
Ben Haha, M.;Le Saout, G.;Lothenbach, B.
通讯作者：
Lothenbach, B.