摘要
古砖的烧制温度决定了其物理力学性质。本研究提出基于磁化率来确定古砖烧制温度的方法。通过对古砖重新加温,测量不同温度下古砖的磁化率,得到磁化率差值的平方-温度曲线图。图中第一个较大的偏差对应的横坐标即为古砖的烧制温度。利用上述方法测得实际烧制温度为700℃、800℃和900℃的黏土砖的烧制温度分别为690℃、810℃和870℃。二者误差较小,认为利用该方法确定砖的烧制温度可行。本研究利用该方法确定了平遥古城10块古砖的烧制温度,发现其烧制温度在650~690℃和850~870℃两个区间范围内。据此推测平遥古城古砖是以秸秆和木柴为燃料烧制而成。本研究实验结果可为古建筑修复和保护提供理论参考。
The firing temperature of ancient bricks determines their physical and mechanical properties.This paper proposes a new method to determine the firing temperature of ancient bricks based on magnetic susceptibility.By reheating ancient bricks,the magnetic susceptibilities of the ancient bricks at different temperatures were measured,and a magnetic susceptibility change-rising temperature figure was thus obtained.The first large deviation in the figure is the firing temperature of the ancient bricks.Using this method,the estimated firing temperatures of clay bricks that were fired at actual temperatures of 700℃,800℃and 900℃were obtained:690℃,810℃and 870℃,respectively.The small difference between the estimated and the actual temperatures proved the feasibility of the proposed method in determining the firing temperatures of bricks.In this paper,the firing temperatures of 10 ancient bricks in Pingyao ancient city were determined using this method.It was found that the firing temperatures were in the range of 650℃~690℃and 850℃~870℃.Based on this,it is speculated that ancient bricks of Pingyao ancient city were heated by burning straw and firewood.The experimental results of this study could provide a theoretical reference for restoration and conservation of ancient buildings.
作者
申佳妮
张中俭
SHEN Jiani;ZHANG Zhongjian(School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China)
出处
《文物保护与考古科学》
北大核心
2020年第5期81-85,共5页
Sciences of Conservation and Archaeology
基金
国家自然科学基金资助(41602329),教育部基本科研业务费资助(2652017073)。
关键词
磁化率
古砖
黏土砖
烧制温度
平遥古城
修复和保护
Magnetic susceptibility
Ancient brick
Clay brick
Firing temperature
Pingyao ancient city
Restoration and conservation
