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为了研究非破损检测方法中的超声法对震后新混凝土进行受压破坏性能进行检测时,其声参数变化规律,分别制作了强度等级为C30和C50,试件尺寸为100 mm×100 mm×100 mm和100 mm×100 mm×300 mm两种规格的混凝土试块未震动与震动各30组,在进行抗压强度试验和静力受压弹性模量试验时采用超声仪器进行同步测试,得到了震后新浇注混凝土受压破坏过程的超声参数变化情况及受压破坏规律,并且与未震动混凝土进行了对比。试验结果表明,无论震动与未震动混凝土采用超声法测试的声参数变化情况与实际混凝土受压破坏荷载-变形关系曲线的各阶段基本吻合,遵循相同的破坏规律。
In order to study the non-destructive testing method of ultrasonic testing of the new concrete after compression damage performance testing, the acoustic parameters of the changes were made for the intensity level C30 and C50, the specimen size of 100 mm × 100 mm × 100mm and 100mm × 100mm × 300mm two specifications of the concrete block vibration and vibration of the 30 groups, in the compressive strength test and static compression modulus of elasticity test simultaneously using ultrasonic equipment to get the After the earthquake, the change of ultrasonic parameters and compression failure of the newly poured concrete during the compression failure process were compared with that of the unstimulated concrete. The experimental results show that the acoustic parameters measured by the ultrasonic method with or without vibrations are basically consistent with the various stages of the load-deformation curve of concrete under compression failure, and follow the same failure rules.