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首页> 外文会议>Twenty-Eighth International Conference - 2002 Athens Conference on Coatings Science and Technology, Jul 1-5, 2002, Vouliagmeni (Athens), Greece >CRITERIA AND METHODOLOGY FOR THE EVALUATION OF CONSERVATION INTERVENTIONS ON TREATED POROUS STONE SUSCEPTIBLE TO SALT DECAY
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CRITERIA AND METHODOLOGY FOR THE EVALUATION OF CONSERVATION INTERVENTIONS ON TREATED POROUS STONE SUSCEPTIBLE TO SALT DECAY

机译：盐易腐烂的多孔多孔石的保护措施评价的标准和方法

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摘要

Susceptibility of stone to salt decay is directly related to its microstructural and mechanical characteristics. In the present work, a porous stone from a quarry in Cyprus was examined. Samples of this stone were consolidated and protected with certain conservation materials. The modification of microstructural characteristics of the stone was evaluated by mercury intrusion porosimetry, while its mechanical characteristics were measured by compressive and bending strength tests. From these data, the susceptibility of Cyprus stone to salt (NaCl) decay was estimated. The values of crystallization pressure of NaCl were calculated and compared to the experimentally measured compressive and tensile strength of the stone, in order to examine the probability of stone disruption due to salt crystallization. The development of the phenomenon after coarse pores' filling with crystals, i.e. crystallization of salts in capillaries or mechanical failure of the stone, was determined by thermodynamic analysis. Additionally, artificial weathering tests of marine salt spray were performed for the evaluation of stone' s durability after the conservation. The treated stone proved to be resistant to salt decay, as it presented ameliorated microstructural and mechanical characteristics, concerning decay due to soluble salt crystallization. The most possible thermodynamic scenario was small pores repletion with crystals, avoiding mechanical failure of the stone.
机译：石材对盐分腐蚀的敏感性直接与其微观结构和机械特性有关。在目前的工作中，检查了塞浦路斯采石场的一块多孔石头。该石头的样品经过加固，并用某些保护材料保护。通过压汞法评估了石材的微观结构特征，同时通过抗压强度和弯曲强度测试来测量其机械特性。从这些数据中，可以估算出塞浦路斯石头对盐（NaCl）衰减的敏感性。计算NaCl的结晶压力值，并将其与实验测量的石材抗压强度和拉伸强度进行比较，以检查由于盐结晶而导致石材破裂的可能性。通过热力学分析确定粗孔填充晶体后现象的发展，即毛细管中盐的结晶或石材的机械破坏。此外，还进行了人造海水盐雾的人工风化试验，以评估养护后石材的耐久性。经处理的石材经证明具有抗盐蚀性，因为它具有改善的微观结构和机械特性，涉及可溶盐结晶引起的锈蚀。最可能的热力学场景是充满晶体的小孔隙，避免了石材的机械故障。

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