Nondestructive detector for strength of lightweight aggregate concrete

Abstract

The invention discloses a lightweight aggregate concrete strength nondestructive detector, and belongs to the field of concrete quality detection. The lightweight aggregate concrete strength nondestructive detector comprises a shell, a detachable upper end plug is installed at the top of the shell, a lower end plug is installed at the bottom of the shell, a fixing plate is installed on the outer side wall of the top of the shell, and a center guide rod is installed at the bottom of the fixing plate; the outer side wall of the center guide rod is slidably sleeved with an elastic hammer, the outer side wall of the elastic hammer is fixedly connected with a protruding block, and the outer side wall of the shell is provided with a movable opening a corresponding to the protruding block. According to the invention, the outer side wall of the shell is provided with a T-shaped limiting block and a limiting spring a, when a pointer block reaches a certain position, the T-shaped limiting block is pressed towards the direction of the shell, so that the T-shaped limiting block can be pressed into the shell, the pointer block is limited, and the situation that the position of the pointer block cannot be fixed when the pointer block is moved to other places to observe the position of the pointer block is avoided; and detection errors are prevented.

Description

technical field [0001] The invention relates to the field of concrete quality detection, in particular to a non-destructive detector for the strength of lightweight aggregate concrete. Background technique [0002] As we all know, the strength and quality of concrete is related to the overall safety and service life of the building structure. Therefore, it is particularly important to do a good job in the quality control, quality supervision and quality inspection of concrete during the entire life cycle of the building. The rebound method is widely used in construction projects because of its simple operation, convenient use, economy, rapidity and considerable detection accuracy. [0003] In recent years, lightweight aggregate concrete has been widely used in various fields of construction engineering because of its light weight, high strength, good thermal insulation effect, excellent fire resistance and durability. At present, lightweight aggregate concrete has become an...

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Problems solved by technology

(5) When the radius of the spherical surface at the top of the bullet is small, the energy absorbed by the concrete surface is large, the rebound value is low, and the detection accuracy is reduced. At the same time, it is easy to cause the deviation of the test angle when the hammer is used. When the concrete surface absorbs less energy

[0008] However, this strength non-destructive detector has a complex structure. When the position of the spring hammer needs to be reset, the buffer compression spring needs to be squeezed, and the spring spring must be stretched at the same time. It is laborious to reset the spring hammer. At the same time, the There is no device for temporarily fixing the pointer block on the non-destructive detector. When it is necessary to move to another place to observe the position of the pointer block, the position of the pointer block cannot be temporarily fixed, which will easily lead to errors in the data detected by the detector.

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