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Evaluation of Synthetic Resins as Conservative of Stone for the Conservation of Historic Buildings

合成树脂作为石材防腐剂对历史建筑保护的评价

基本信息

批准号：
08555149
负责人：
NISHIURA Tadateru
金额：
$ 7.36万
依托单位：
Tokyo National Research Institute of Cultural Properties
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555149/
关键词：
Conservation of Cultural Property Historic Buildings Consolidation of Stone Synthetic Resins

项目摘要

Evaluation tests of synthetic resins as consolodant used for the conservation of historic stone buildings were carried out. Penetration speed into a stone, consolidation ability to a stone, durability after treatment, etc., were evaluated by various tests in labolatory and in situ. Tested resins are some kinds of silicone resin, acrylic resins and epoxy resins, which are in actual use for the conservation of stone monuments. As for penetration speed, relation between water content of a stone and the penetration speed of a resin solution into the stone was measured. As for consolidation ability, relation between penetration depth of a resin and the hardness of the stone impregnated with the resin was measured. As for durability after treatment, some kinds of accelerated aging tests to the treated stone were done. Those tests mentioned above were experimental. As for test in situ, penetration degree of resin solutions and consolidation effect were evaluated at the field. As the results, the following remarks were obtained :・into a moist stone, resin solution in an organic solvent penetrates much more deeply than a resin solution in water.・When a stone is impregnated with a resin solution by capilality, outer part of the stone is consolidated more hardly than the inner part of the stone. This is because that resin moves to the outer part by the volatilization of the solvent. So, acrylic resin and epoxy resin, which are to be solved in a higher amount of a solvent, have this characteristeic rather than the other tested silicone resins.・When a stone is impregnated with hydrophobic silane, its permiability to water vapor decreased to quite a large extent. This phenomenon can be explained that water vapor becomes liquid water in the stone and stays there due to the hydrophobicity given by impregnated hydrophobic silane.

对合成树脂作为石质古建筑保护加固剂进行了评价试验。对石材的渗透速度、对石材的固结能力、处理后的耐久性等，通过实验室和现场的各种试验进行了评价。试验树脂为目前实际用于石质文物保护的有机硅树脂、丙烯酸树脂和环氧树脂。至于渗透速度，测量了石头的含水量与树脂溶液进入石头的渗透速度之间的关系。关于固结能力，测量树脂的渗透深度与浸渍有树脂的石材的硬度之间的关系。对于处理后的耐久性，对处理后的石材进行了各种加速老化试验。上面提到的测试都是实验性的。现场试验方面，对树脂溶液的渗透程度和加固效果进行了评价。作为结果，得到以下说明：·在潮湿的石头中，有机溶剂中的树脂溶液比水中的树脂溶液渗透得更深。当石头通过毛细作用被树脂溶液浸渍时，石头的外部比石头的内部更难固结。这是因为树脂通过溶剂的挥发而移动到外部。因此，与其他测试的有机硅树脂相比，丙烯酸树脂和环氧树脂具有此特性，因为它们需要在更高量的溶剂中溶解。·当石材浸渍有疏水性硅烷时，其对水蒸气的渗透性在相当大的程度上降低。这种现象可以解释为水蒸气在石头中变成液态水，并且由于浸渍的疏水硅烷所赋予的疏水性而停留在那里。