Device and method for measuring early-age relative humidity of cement-based material

A cement-based material and relative humidity technology, applied in the direction of material inspection products, etc., can solve the problems of low measurement error, less early relative humidity, and little significance of data research, so as to reduce test cost, accurate and reliable test data, and avoid damage Effect

Active Publication Date: 2015-08-12
HOHAI UNIV
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Problems solved by technology

Moreover, the internal relative humidity of cement-based materials in the early stage is generally above 98%. Such an internal environment determines the difficulty of measuring the relative humidity in the early stage of cement-based materials.
Although some low-accuracy humidity sensors can start measuring earlier, due to the low accuracy, the...

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  • Device and method for measuring early-age relative humidity of cement-based material
  • Device and method for measuring early-age relative humidity of cement-based material

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1As shown, in the actual application process, a relative humidity measuring device of a kind of cement-based material designed by the present invention includes a casing 1, a humidity sensor 2 and a data acquisition instrument 3; wherein, the probe 4 of the humidity sensor 2 is formed by the casing The top opening of 1 is inserted into casing 1, the probe 4 of humidity sensor 2 is located at the bottom of casing 1, and does not protrude from the opening at the bottom of casing 1; the side wall of casing 1 is in the same position as probe 4 of humidity sensor 2 At least one through hole 6 is set at the corresponding position, and the design of the through hole 6 is to enable the humidity sensor 2 to have enough contact space with the cement-based material to ensure the accuracy of the humidity sensor...

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Abstract

The invention relates to a device for measuring early-age relative humidity of a cement-based material. In order to measure the early-age relative humidity of the cement-based material, a brand new design structure is adopted, the early-age internal high temperature of the cement-based material and damage of high humidity on a sensor probe can be effectively avoided, and an early-age relative humidity curve of the cement-based material can be accurately obtained. The invention also relates to a method for measuring the early-age relative humidity of the cement-based material. Aiming at previous data, a spot measurement method is adopted, the condition that the sensor probe is damaged by the continuous saturated relative humidity and the high temperature can be avoided, and when the humidity of the cement-based material is lower than 100 percent, the humidity is automatically collected by a computer, a high-precision humidity curve can be obtained, and the sensor can be prevented from being damaged.

Description

technical field [0001] The invention relates to a relative humidity measuring device and a measuring method for cement-based materials at an early age, and belongs to the technical field of building material measurement. Background technique [0002] With the continuous progress and development of society, the performance requirements of concrete and other cement-based materials are getting higher and higher in actual engineering. At the same time, cracking caused by high shrinkage of high-performance concrete is becoming more and more common. Cracking of concrete structures is a One of the main reasons for the reduction of durability of actual structural engineering at present. Relative humidity inside concrete is one of the important parameters to study shrinkage. Therefore, in order to ensure the durability of concrete structures, it is necessary to study the humidity measurement of cement-based materials such as concrete. [0003] At present, high-precision measurement...

Claims

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Application Information

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IPC IPC(8): G01N33/38
Inventor 赵海涛骆勇军陈育志唐易民周亮亮盛韬桢朱晓琳
Owner HOHAI UNIV
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