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Concrete early thermal expansion coefficient testing device and testing method thereof

A technology of thermal expansion coefficient and testing device, applied in the direction of material thermal expansion coefficient, etc., can solve the problems of heat conduction, affecting test accuracy, deformation, etc., to avoid humidity exchange, convenient and effective operation, and eliminate drying shrinkage.

Inactive Publication Date: 2012-07-25
福建省融旗建设工程有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the curing test barrel cannot be deformed together with the specimen, and it also has a certain impact on heat conduction, which affects the test accuracy

Method used

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  • Concrete early thermal expansion coefficient testing device and testing method thereof
  • Concrete early thermal expansion coefficient testing device and testing method thereof
  • Concrete early thermal expansion coefficient testing device and testing method thereof

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Embodiment Construction

[0040] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

[0041] Such as figure 1 and figure 2 As shown, the bellows test mold used in the present invention includes a bellows 1 , a thermocouple 2 and a test terminal 3 . Such as Figure 3 ~ Figure 5 As shown, the bellows test mold fixing device used in the present invention includes a screw rod 4 , a bottom plate 5 , a fixing clip 6 and a nut 7 .

[0042] Before pouring concrete, the four screw rods 4 and the bottom sheet 5 are vertically connected with nuts 7, and the nuts 7 are tightened, and placed vertically. Align the center of the corrugated tube test mold with the test end 3 on the bottom surface with the centroid of the negative plate 5, and place it vertically. In the direction of the vertical screw 4, fixed clips 6 are placed at regular intervals, and t...

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Abstract

The invention relates to a concrete early thermal expansion coefficient testing device and a testing method. The testing device comprises: a corrugated pipe test die for pouring concrete to be measured so as to form a concrete corrugated pipe test piece, a corrugated pipe test die fixing device for fixing the corrugated pipe test die so that the corrugated pipe test die keeps in a vertical state so as to be convenient for pouring, a length measuring device for measuring the deformation of the concrete corrugated pipe test piece, and a temperature control box for containing the length measuring device on which the concrete corrugated pipe test piece is arranged, and for controlling the temperature of the test environment, wherein the corrugated pipe test die is composed of two test terminals and a corrugated pipe connected to the two test terminals; and a thermocouple for monitoring the change rule of the internal temperatures of the concrete is arranged in the inner cavity of the corrugated pipe. The testing device is simple in structure, convenient for fabrication, high in test accuracy, and convenient in test operation.

Description

technical field [0001] The invention relates to a test device for early thermal expansion coefficient of concrete and a test method thereof, belonging to the field of civil engineering. Background technique [0002] High-performance concrete contains external admixtures (fly ash and slag, etc.) and admixtures (high-efficiency water reducer, etc.), with complex components, a large amount of cementitious materials, large self-shrinkage of concrete, and high sensitivity to cracking. The early performance of high-performance concrete changes drastically. Under the influence of load, external environment and uncertain factors, early cracks form and develop inside high-performance concrete, which affects the durability and service life of concrete structures. Studies have shown that the thermal expansion coefficient of early concrete varies greatly, and it is unreasonable to ignore the time dependence of the thermal expansion coefficient. If the early concrete thermal expansion co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/16
Inventor 季韬江其东陈先锋张永霞周丰
Owner 福建省融旗建设工程有限公司
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