Mortar analysis of historic buildings damaged by recent earthquakes in Italy
Mortar analysis of historic buildings damaged by recent earthquakes in Italy
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意大利近期地震受损历史建筑的砂浆分析
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
D. Liberatore
中科院分区：
文献类型：
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作者：
G. Roselli;D. Mirabile Gattia;O. AlShawa;P. Cinaglia;G. Di Girolami;C. Francola;F. Persia;E. Petrucci;R. Piloni;F. Scognamiglio;L. Sorrentino;S. Zamponi;D. Liberatore
摘要：本文介绍了一项对意大利中部地震(2016-2017)后受损或倒塌的历史和纪念性建筑的砂浆样本进行的实验研究。通过一系列诊断性调查对61个样本进行了分析，以确定砂浆的特征并将其与砖石结构的性能相关联。所使用的技术有：X射线衍射、扫描电子显微镜和微量分析、差示扫描量热法、量热法、傅立叶变换红外光谱分析、电导法分析可溶性盐和离子色谱分析阴离子物种的用量、粒度分析、直接剪切。对迫击炮的微观结构特征表明，不同来源的迫击炮在组成上存在差异。特别是，诺西亚的样品中含有大量方解石，而在普雷塔雷的砂浆中，发现了白云石。在阿马特里切的情况下，只有几个样品显示出晶相和可归因于粘结剂的化合物。这些结果在很大程度上得到了其他化学和物理分析的证实，力学测试也显示出低粘聚力。测试表明，在几乎所有的样品中，都使用了质量较差的砂浆，在某些情况下，粘结剂砂浆的效果也不佳。
Abstract.The paper presents an experimental study on mortar samples taken from historic and monumental buildings damaged or collapsed following the seismic events in Central Italy (2016-2017). Sixty-one samples were analysed via a set of diagnostic investigations to characterize the mortar and correlate it with the performance of the masonry. The techniques used were: X-ray diffraction, scanning electron microscopy and microanalysis, differential scanning calorimetry, calcimetry, Fourier-transform infrared spectroscopy, soluble salt analysis by conductimetry and dosage of anionic species by ion chromatography, particle-size analysis, direct shear. Microstructural characterization of the mortars revealed differences in mortar composition depending on their provenance. In particular the samples from Norcia contained large quantities of calcite while in the mortars from Pretare, dolomite was identified. In the case of Amatrice, only a few samples showed crystalline phases and compounds ascribable to binders. These results were largely confirmed by the other chemical and physical analysis performed, and mechanical tests also demonstrated low cohesion. The tests showed that in almost all the samples, poor quality mortars were used, and, in some cases, underachieving binder mortar.