A device and method for testing the impermeability performance of hardened concrete under restraint

A testing device and concrete technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as large shrinkage, inconsistent concrete forming and hardening process, and affecting the durability of concrete, and achieves convenient operation, accurate measurement, and simple structure Effect

Active Publication Date: 2011-12-28
POWERCHINA ZHONGNAN ENG
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Problems solved by technology

However, the widely used high-strength high-performance concrete has a large early shrinkage, which can cause early cracking of the concrete under constraint conditions. The generation of cracks will reduce the impermeability of the concrete, thereby affecting the durabili

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  • A device and method for testing the impermeability performance of hardened concrete under restraint
  • A device and method for testing the impermeability performance of hardened concrete under restraint
  • A device and method for testing the impermeability performance of hardened concrete under restraint

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Embodiment Construction

[0034] Such as figure 1 As shown, the device of the present invention is composed of a concrete constraint cracking frame 1, a chloride ion penetration test device 2 and a support frame 3. Among them, four ribs 1-1, 1-2 have been added to the outside of each side of the concrete restraint cracking frame 1 to improve the rigidity of the test device, and 14 fully threaded bolts 1-2 are assembled on the four sides of the test device. 1 Constrains the shrinkage of concrete. The chloride ion permeation test device 2 is composed of a cathode chamber 2-6 and an anode chamber 2-7, both of which are symmetrical structures. The two pole chambers are respectively composed of terminal posts 2-2, 2-10, electrodes 2-3, and cooling holes 2-5, and there are four holes 2-9 at the two pole chambers 2-1 respectively. The supporting frame 3 is composed of a flat plate 3-2 and a vertical beam 3-1.

[0035] The specific test method is as follows:

[0036] Lay a plastic sheet on a level ground, ...

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Abstract

The invention discloses a detection apparatus for impermeability of hardened concrete under a constraint state, and a method thereof, and belongs to the field of the impermeability of the hardened concrete. In the prior art, the concrete is not under the constraint state when the impermeability of the concrete is detected through the existing experimental apparatus and the existing method, the detection result deviates from the actual result. The purpose of the present invention is to solve the problem in the prior art. The apparatus provided by the present invention comprises a support frame. The support frame is provided with a concrete restraining cracking support. The concrete restraining cracking support is provided with a chloride ion penetration test device. The chloride ion penetration test device comprises a cathode chamber and an anode chamber, wherein both the cathode chamber and the anode chamber comprise binding posts and electrodes. The detection method comprises: detecting the current between the two binding posts through an ammeter, calculating the electric flux to evaluate the impermeability of the formed concrete under the constraint state. According to the present invention, the detection for the impermeability of the hardened concrete is performed under the constraint state, and the theoretical support and the test tool are provided for in-depth study of the durability of the concrete, optimization of mix ratio and structure design of the concrete.

Description

technical field [0001] The invention relates to the field of anti-seepage of hardened concrete, in particular to a device and method for measuring the anti-seepage performance of hardened concrete in a restrained state. Background technique [0002] The permeability resistance of concrete is a measure of the ability of concrete to resist the diffusion of external corrosive media into the interior of the concrete. However, the widely used high-strength and high-performance concrete has a large early shrinkage, which can cause early cracking of the concrete under constraint conditions. The generation of cracks will reduce the impermeability of the concrete, thereby affecting the durability of the concrete. [0003] At present, the research on the impermeability of concrete is carried out in the free state of concrete, which is inconsistent with the concrete forming and hardening process in actual engineering, so the measurement results deviate from reality. Therefore, invest...

Claims

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Application Information

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IPC IPC(8): G01N13/04
Inventor 冯树荣李中华苏超
Owner POWERCHINA ZHONGNAN ENG
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