Device for measuring internal humidity of concrete and arrangement method thereof

Abstract

The invention discloses a device for measuring internal humidity of concrete and an arrangement method of the device. The device comprises a humidity sensor, and is characterized in that the humiditysensor is arranged in a protective shell body, the surface of the protective shell body is covered with a layer of concrete slurry, and a plurality of breathable filter holes are formed in the surfaceof the protective shell body. In addition, the invention further discloses the arrangement method corresponding to the device. According to the device and the arrangement method, concrete internal humidity data can be effectively measured for a long time, the device can be quickly and conveniently arranged in combination with a concrete pouring construction process, the phenomenon that the measuring device is damaged in concrete pouring construction is effectively avoided, data support is provided for researching humidity distribution and evolution characteristics in concrete, and the deviceand the arrangement method have positive guiding significance for preventing and treating concrete cracks.

Description

technical field [0001] The invention relates to the technical field of concrete construction in water conservancy projects, in particular to a device for measuring the internal humidity of concrete and an arrangement method thereof. Background technique [0002] In water conservancy and hydropower projects, various large-volume concrete buildings abound, which have made important contributions to the development of the national economy and social progress. The mixed and stirred heterogeneous brittle material often cracks with the passage of service time and the influence of internal and external forces, which seriously affects its 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 temperature and moisture changes in the structure, and the internal tensile stress of the structure reaches a certain stress level under constraint condit...

AI Technical Summary

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

Images