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An experimental study on restoration technique for the Acropolis of Athens: developing the experimental set-up for pull-out testing of titanium bars embedded in marble blocks

机译：雅典卫城恢复技术的实验研究：开发在大理石块中嵌入式钛棒拉出试验的实验设置

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?his work aims at investigating the mechanisms activated during the ex¬trac¬tion of titanium bars from a marble volume (pull-out phenomenon), used for re¬joining fragmented marble structural members at the monuments of the Acropolis of Athens. The restoration protocol includes the insertion of threaded titanium bars into pre-drilled holes in the body of the structural members. The ad-hesion between marble and bars is achieved by an initially liquid cementitious material. There are two main aspects on which this project focuses. Firstly, the weak link of the marble-cement-titanium complex, the marble-cement interface, is inaccess¬ible for traditional sensing techniques. In this context, the Acoustic Emission tech¬nique is employed in order to detect failure and damages at the interior of the complex. Secondly, the specimens and the experimental procedure should simulate the same stress conditions in which all three phases within the marble-cement-titanium complex are under, while the struc¬tural member is in service. For this purpose, two modified tests are proposed aiming at efficiently simulating the bars� behavior as they are sliding through a marble epistyle. These tests provide promising results with regards to keeping the examined surface between bars and marble free from para¬sitic stresses caused by the experimental set-up
机译：？他的工作目的是调查从大理石体积（拔出现象）钛棒的ex¬trac¬tion中被激活的机制，用于在雅典卫城的古迹re¬joining碎片大理石结构构件。恢复协议包括的螺纹杆钛插入到在结构件的主体预钻孔。大理石和杆之间的广告HESION由初始液胶凝材料来实现的。有上这个项目的重点是两个主要方面。首先，大理石水泥钛络合物，大理石水泥界面的薄弱环节是inaccess¬ible传统的传感技术。在这种情况下，声发射tech¬nique采用以检测在所述复合物的内部故障和损坏。其次，将试样和实验程序应模拟相同的应力条件下，其中，大理石水泥钛复合之内的所有三个阶段下，而struc¬tural构件处于服务。为此，两个修改测试提出了旨在有效地模拟棒的行为，因为他们是通过一个大理石epistyle滑动。这些测试承诺与问候结果与所造成的实验装置para¬sitic应力免费保持酒吧和大理石之间受检面

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