引用本文摘 要：针对玻化微珠外墙外保温系统服役过程存在的病害特征，利用非金属超声检测仪测试了该系统在室内加速老化过程的劣化特征信号，对比分析了系统老化状态对不同部位的超声波波速、频率特征信号的影响，研究了不同热雨循环阶段该系统的超声波信号特征与宏观裂缝位置的对应性。结果表明：对于不同热雨循环下的玻化微珠外墙外保温系统，超声波信号异常位置与裂缝位置具有较好的对应性，系统饰面层的劣化特征与超声波波速信号异常数量的增长趋势一致，据此可实现该系统劣化阶段的无损检测；随着热雨循环次数的增加，超声波信号频率中心由低频向高频转移。 Abstract: Aiming at the disease characteristics of the external thermal insulation composite systems with glazed hollow bead (ETICS-GHB) during the service process, the degradation characteristic signals of the ETICS-GHB were carried out by a non-metallic ultrasonic detector in accelerated aging process indoors. The ultrasonic wave velocity and frequency characteristic signals of different parts of the ETICS-GHB were studied at different aging state. The relationship between ultrasonic signal characteristics and macro cracks location of this system in different heat-rain cycle stages was analyzed. The results show that the abnormal position of the ultrasonic signal has a good correspondence with the crack location for the ETICS-GHB under different heat-rain cycles, and the deterioration characteristics of the finish coating of the ETICS-GHB are consistent with the increasing number of abnormal ultrasonic wave velocity signals, and the degradation level of the ETICS-GHB can be achieved by the non-destructive testing. With the increase of heat-rain cycles, the frequency center of the ultrasonic signal shifts from low frequency to high frequency.
叶家辉,田静静,熊厚仁,等.基于超声波技术的玻化微珠外墙外保温系统劣化特征研究[J].混凝土与水泥制品,2020(11):74-78. YE J H,TIAN J J,XIONG H R,et al.Research on Deterioration Characteristics of External Thermal Insulation Composite Systems with Glazed Hollow Bead Based on Ultrasonic Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11): 74-78.