摘要
烧结粘土砖作为中国古建筑使用最广泛的材料之一,现有的机械物理性能检测方法多为破坏性的,采用超声波无损检测法则可以最大程度保证砖的完整性。因此,本工作对比了试验台、砖表面平整度以及砖湿度等客观条件对超声波无损检测方法的影响,确定了超声波法检测古代粘土砖性能的操作流程。在初步测定采自山西南部及香港某古建筑的砖性能后发现,超声波无损技术可以标定砖的机械物理性能,并能判断同类型砖的不同劣化程度。超声波无损检测过程可以很好地保证古代砖的完整性,不会对古建筑造成破坏,而且具有便携性。研究结果表明,超声波无损检测是可以推广应用的古建筑勘察及质量监测技术。
Sintered clay bricks are among the most important masonry materials use in ancient Chinese architecture. However there are still no nondestructive test methods to characterize bricks＇ mechanical and physical properties. Nondestructive ultrasonic test might be suitable since the old bricks will not be damaged during testing. Factors such as test bed,surface status and moisture content of the brick are considered in the test. It was found that ultrasonic velocity of a brick is associated with its mechanical strength by testing bricks from southern Shanxi and from an ancient building in Hong Kong. The ultrasonic testing results can determine the level of deterioration of similar types of bricks. This method also preserves the integrity of ancient brick,does not damage the ancient building materials. The test instrument is portable and thus can be widely used for the investigation of building defects and quality monitoring.
出处
《文物保护与考古科学》
北大核心
2016年第2期16-23,共8页
Sciences of Conservation and Archaeology
基金
国家自然科学基金资助(E080102)
国家文物局文物保护科技优秀青年研究计划资助(2014223)
关键词
超声波速
烧结粘土砖
古建筑
强度
含水率
Ultrasonic velocity
Sintered clay brick
Ancient architecture
Mechanical strength
Water-content
