Separation type concrete humidity field measuring device and method

Abstract

The invention discloses a separation type concrete humidity field measuring device and method. The device includes a first pipe, a second pipe, a third pipe, a rubber piston, a humidity sensor and a wireless acquisition device; the two ends of the first pipe are open; one end of the second pipe is closed, the other end of the second pipe is open, and the outer diameter of the second pipe is slightly smaller than the inner diameter of the first pipe. The two ends of the third pipe are open, the outer diameter is slightly smaller than the inner diameter of the first pipe; the rubber piston and the humility sensor are placed in the third pipe, the humidity sensor is located on the lower portion of a rubber plug and connected with the wireless acquisition device.

Description

technical field [0001] The invention relates to the field of prestressed concrete humidity detection, in particular to a separate concrete humidity testing device and method. Background technique [0002] An important reason for the cracks on the concrete surface is the dry shrinkage stress or wet stress on the concrete surface. The humidity inside the concrete will cause the concrete to deform, and the relative humidity will increase, and the concrete will expand, and vice versa, it will shrink. There are two main situations in which shrinkage cracks appear in concrete structures: one is that the overall shrinkage of concrete causes penetrating cracks under the constraints of the external structure, which mainly occurs when the cross-sectional size of the component is small, and the dehydration and shrinkage of the surface layer plays a leading role; the other is that Under the effect of internal and external humidity gradient, the uncoordinated deformation caused by the d...

AI Technical Summary

Problems solved by technology

[0003] During the solidification process of concrete, there is a process of transition from liquid to solid state, and the humidity sensor is difficult to survive after being exposed to water. Therefore, the humidity sensor cannot be embedded in advance before pouring concrete, which makes the test of the internal humidity field a worldwide problem.

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