Concrete cracks are a common problem in construction engineering. Structural cracks on concrete can be divided into two major categories: structural and non-structural; structural cracks are caused by loads, and their cracks correspond to loads. Insufficient force is also a sign that the structure begins to break or the strength is insufficient; the non-structural crack is mainly caused by non-structural causes such as settlement, temperature, shrinkage, etc., which is characterized by the constraint and limitation of the deformation of the member. The stress is greater than the allowable tensile stress of the concrete, causing the concrete to be cracked;
The crack depth detection is suitable for ultrasonic method(hereinafter referred to as ultrasonic flaw detector). According to the relationship between the depth of the crack and the thickness of the tested member and the testable surface condition, the single-sided flat test method, the double-sided oblique test method and the borehole test method can be selected.
Ultrasonic flaw detector sound frequency is 0.4-25 megahertz, the most used is 1-5 megahertz, more than human hearing. The use of sound to detect the quality of an object has long been used. For example: pat the watermelon by hand to hear if it is cooked; the doctor knocks on the patient's chest to check whether the internal organs are normal; knock the porcelain bowl by hand to see if the porcelain bowl is broken. Because the ultrasonic flaw detector has a large detection distance, the ultrasonic flaw detector is small in size, light in weight, easy to carry to the site for flaw detection, and the ultrasonic flaw detector speed is fast, and only the coupling agent and the wear probe are consumed in the flaw detection, and the total inspection cost is low, and the current construction industry market this method is mainly used for detection. For more information on ultrasonic flaw detectors, please feel free to contact us!
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