 Analysis of rebound detection technology
The rebound method uses a spring-driven weight to hit the concrete surface through a force transmission rod, then measures the distance after the weight is rebounded, and uses the rebound value as the relevant index of the measured object to determine the Measure the strength of the concrete. The rebound method is a method for detecting the quality of concrete according to the relationship between the strength of the concrete and the hardness of the concrete surface. Using the rebound method to test the strength of concrete in dams or other parts is fast, economical and reliable. The rebound test method will not affect the normal use of concrete, nor will it affect the actual quality and uniformity of Huining map. Although various non-destructive testing methods have emerged this year, the rebound method has always been considered as a very representative concrete testing method. The instrument structure of the rebound method is relatively simple.
Application of rebound detection technology
Before using the rebound method for testing, you need to understand the construction drawings of the tested project, the strength design of the concrete, and the mix ratio of the concrete, and understand the concrete pouring and curing methods; The test surface is clean and certified, and there must be no problems with transportation and dirt in Germany. The measuring area of each structure to be tested should be above 10cm. If the surface size of the structure being tested is too small, the number of measuring areas can be appropriately reduced. The distance between two adjacent measurement areas must be controlled at 2m or more. When testing, the axis of the rebound tester must be perpendicular to the testing surface of the concrete, and then full and uniform pressure is applied. Do not use excessive force or sudden impact during the test. The test points should be evenly distributed in the test area, and the military strength of the test points on the exposed steel bars should be guaranteed to be more than 30mm. And the measuring point cannot be set on the air holes or exposed stones. After the rebound value measurement is completed, a representative position can be selected to measure the carbonization depth value, and the average value is used as the carbonization depth value. When calculating the rebound value, all the rebound values in the measured area should be stated. Among them, 3 maximums and 3 minimums are removed, and then the remaining rebound average is removed. (责任编辑：admin) |