ABSTRACT
Because of the production process, the material itself and the dry-wet circulation, the concrete‘s interior emerges micro injury and changes functions .At present,Both at home and abroad, according to the structure of concrete structure concrete effect of tiny cracks in the mechanical properties of the more research,About the damage and the deteriorating law especially nondestructive testing of experimental study is less。Tendons nondestructive testing technology generally USES ultrasonic,With acoustic detection methods of concrete damage and deteriorating law. This experiment was different degree of different strength damaged state sixty of the grain concrete cube acoustic properties of the samples,The concrete analysis in different strength of concrete under different degree of damage the change rule of acoustic properties.Are analyzed in the same strength of concrete under different degree of damage and different strength the same damage degree of the change rule of acoustic properties,compared the waveform, frequency, sound while parameters,discusses the acoustic characteristics of concrete were using the damage degree of possibility。This proof,we can through the sound waves test to detect the quality of concrete condition as well as the possible existence of safety problems,deal with problems in time to ensure the project safety。
KEY WORDS: Concrete , Different intensity, Acoustic characteristics , Break , Regular