平遥古城城墙古砖风化程度环境磁学无损检测

Study on weathering degree of ancient bricks of Pingyao ancient city wall with environmental magnetic non-destructive testing

古砖风化程度无损检测与评价是治理文物建筑风化病害的前提和基础。本文以世界文化遗产地平遥古城城墙风化古砖为研究对象,在定性描述的基础上,利用环境磁学便携式无损检测仪器,现场定量评价古砖的风化程度,并结合常用于砖石质文物风化程度检测的仪器进行现场验证。结果表明,利用环境磁学便携式SM-30磁化率仪器无损检测和评价平遥古城城墙古砖的风化程度是可行的,城墙古砖风化程度的磁化率划分标准与古砖表面力学强度具有很好的对应关系,可以在很大程度上反映古砖的风化变质情况。研究成果可为平遥古城城墙古砖的防风化保护措施的制定提供基础数据,具有重要的科学意义。

The non-destructive testing of the weathering degree of ancient bricks is the premise and foundation for the treatment of weathering diseases. Based on the qualitative observation,the quantitative evaluation of the weathering degree of ancient bricks in Pingyao ancient city,a world cultural heritage site,is carried out by means of the portable non-destructive testing instrument of environmental magnetism and verified in the field combining with the testing instrument commonly used for the weathering degree of brick and stone cultural relics. The results show that it is feasible to use the portable SM-30 magnetization instrument with environmental magnetism to detect and evaluate the weathering degree of the ancient bricks of Pingyao ancient city wall. The magnetization of the weathered ancient bricks in the city walls has a good correspondence with the surface strength,which could reflect the weathering and deterioration of ancient bricks to a great extent. The research results could provide the basic data for the protection measures of the ancient bricks of Pingyao ancient city and has important scientific significance.