高温下高强高性能混凝土性能劣化的表征方法

介绍了有关高温作用下混凝土性能劣化测试方法,包括混凝土建筑构件耐火性能的测试标准,国内外学者对混凝土高温爆裂的测试方法以及高温后混凝土损伤的红外热像法与色彩图像分析法。提出从机理方面寻找科学与全面的方法定量评价爆裂程度;红外热像法和色彩图像分析高温下混凝土损伤是无损检测技术的新发展方向。此外,设计简便可靠的混凝土高温性能测试方法,以现有成熟的物理力学与无损检测技术作为评价指标是必要的。

Test methods of HSC/HPC deteriorated performance at high temperature

Forms and mechanisms of HSC/HPC wreck at high temperature were summarized and testing methods of concrete at high temperature were introduced.The methods were fire-resistance tests of elements of building construction,testing method of concrete and spalling at high temperature,and infrared thermography and color image analysis after high temperature.A scientific and comprehensive method was proposed for quantitative analysis of spalling degree from its mechanism.Infrared thermography and color image analysis are a new developing orientation for nondestructive testing technology.Additionally,designing a simple and reliable testing method of concrete at high temperature,and combining mature physical mechanics and nondestructive testing technology as assessment is necessary.