A device for measuring the humidity inside concrete and its arrangement method

Abstract

The invention discloses a device for measuring the humidity inside concrete and an arrangement method thereof. The device includes a humidity sensor, which is characterized in that: the humidity sensor is arranged in a protective shell, and the surface of the protective shell is covered with a layer of concrete slurry. There are multiple air-permeable filter holes on the surface of the protective shell; in addition, the invention also discloses a corresponding arrangement method for the device; the invention can effectively measure the humidity data inside the concrete for a long time, and can be quickly and conveniently arranged in combination with the concrete pouring construction process , and effectively avoid the phenomenon of damage to the measuring device during concrete pouring construction, provide data support for the study of moisture distribution and evolution characteristics in concrete, and have positive guiding significance for concrete crack prevention.

Description

technical field [0001] The invention relates to the technical field of concrete construction in hydraulic engineering, in particular to a device for measuring internal humidity of concrete and an arrangement method thereof. Background technique [0002] In water conservancy and hydropower projects, various types of mass concrete buildings abound, which have made important contributions to the development of the national economy and social progress. Heterogeneous brittle materials mixed and stirred will often crack with the passage of service time and the influence of internal and external forces, which seriously affects their service life. [0003] Engineering practice shows that the cracking of concrete structures is mostly caused by non-load factors, that is, the volume expansion or contraction of concrete caused by changes in temperature and moisture in the structure, and the tensile stress in the structure reaches a certain stress level under constraint conditions. Amon...

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Problems solved by technology

[0007] Although the above methods have also completed the concrete humidity measurement work in some cases, they have not been recognized by everyone due to reliability and accuracy.

For example, the measurement is carried out by sealing the sensor inside the test piece, although the humidity exchange between the reserved hole and the environment can be avoided, but there is a certain difference between the moisture left in the seal and the moisture in the concrete during pouring, which affects the measurement results; and Although the plastic paint cap can cut off the contact between the sensor and the slurry, and can allow gas transmission, but for early-age concrete, the internal relative humidity starts to drop from 100%, and the test accuracy is difficult to guarantee in the case of higher humidity ; and because the concrete pouring construction is relatively rough and complicated, it is easy to cause damage to the measuring device and affect its long-term stability. In the case of ensuring the measurement accuracy, certain protection should be considered for the measuring device

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