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

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...

AI Technical Summary

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 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 the actual

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