Analog detecting method for concrete grown volume deformation and device thereof

A technology of volume deformation and temperature detection device, which is applied in the field of concrete, can solve problems such as concrete differences, and achieve the effect of temperature balance and good stability

Active Publication Date: 2011-01-05
JIAHUA SPECIAL CEMENT
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Problems solved by technology

Taking 20°C as the test temperature is not in line with the site conditions, so the measured deformation of the concrete is very different from the actual deformation on site

Method used

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  • Analog detecting method for concrete grown volume deformation and device thereof
  • Analog detecting method for concrete grown volume deformation and device thereof
  • Analog detecting method for concrete grown volume deformation and device thereof

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Embodiment Construction

[0030] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] The method for simulating and detecting autogenous volume deformation of concrete of the present invention comprises the following steps:

[0032] a. Mix the concrete to make concrete specimen 1, while making concrete specimen 1, if Figure 5 As shown, a strain gauge 4 is embedded in the center of the concrete specimen 1 and integrally formed; the strain gauge 4 adopts a differential resistance. The strain gauge 4 has the function of detecting the internal temperature and deformation of the concrete specimen 1 .

[0033] b. In order to facilitate the improvement of detection accuracy and data comparison, at least two concrete specimens 1 are formed into a group and put into the thermal insulation specimen cavity 2; figure 1 As shown, two thermal insulation specimen cavities 2 are used, and two concrete specimens 1 are respectively pla...

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Abstract

The invention discloses an analog detecting method for concrete grown volume deformation, comprising the following steps: a, integrally forming concrete and a strain gauge; b, placing concrete into a heat insulation sample chamber; c, detecting the temperature in the heat insulation sample chamber, and controlling a cooling device or a heating device to enable the temperature change curve in the heat insulation sample chamber to be consistent with concrete on-site temperature change curve; d, detecting internal temperature and deformation of the concrete sample to obtain change curves of internal temperature and deformation of the concrete sample; and e, processing the temperature change curve and the change curves of the internal temperature and deformation of the concrete sample to obtain detection experimental data and complete detection. The invention further discloses a detecting device for realizing the method. The invention can accurately simulate the process of on-site large-volume concrete deformation and has little error between detected concrete deformation and on-site condition, and therefore, the invention has high practicality for concrete characteristic estimation.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a method and device for simulating and detecting autogenous volume deformation of concrete. Background technique [0002] The quality of concrete widely used in bridge engineering, road bridges, railways, dams and other construction projects plays a decisive role in the quality of buildings. The key factor affecting the quality of concrete is the hydration heat characteristics of cement. Cement generates a lot of heat during the hydration process, which increases the temperature of the concrete, increases its volume, and changes its shape. Excessive deformation will cause internal cracks, or form cavities, and the structure is loose, which seriously affects the strength and quality of buildings. . The autogenous volume deformation of concrete is mainly caused by the hydration of the cementitious material. The hydration rate of the cementitious material interacts with the temperature. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
Inventor 吴勇阳运霞韩建国曾雪玲付颖范有银王田堂季真强
Owner JIAHUA SPECIAL CEMENT
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