Method of testing permeability of concrete on surface of reinforced bar

A test method and concrete technology, applied in the direction of analyzing materials, instruments, etc., can solve the problems of different surface permeability, non-representation, and inapplicability of conventional concrete permeability test methods

Inactive Publication Date: 2010-12-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology involves generating small amounts of hydroxide (OH) around an area where there are no other materials that could affect its properties when exposed to moisture during construction processes. By measuring this change over time it provides important data for evaluating the quality of these areas without requiring expensive equipment like laboratory tests.

Problems solved by technology

Technological Problem addressed in this patents relates to improving the quality control of concrete products due to their ability to maintain proper performance over long periods of use. However, current methods require significant amounts of laboratory analysis which makes them difficult to implement in realistic situations where there could exist multiple layers of imperviousness within the product being analyzed.

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  • Method of testing permeability of concrete on surface of reinforced bar
  • Method of testing permeability of concrete on surface of reinforced bar
  • Method of testing permeability of concrete on surface of reinforced bar

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Embodiment Construction

[0022] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings, but the implementation and protection scope of the present invention are not limited thereto.

[0023] Formed according to the mix ratio in Table 1--100×150mm concrete specimen (such as figure 1 ), a light source steel bar of 12×200mm was buried in the center of the concrete circle, and it was taken out after 90 days of curing under standard conditions for permeability testing. The internal steel bar is used as the cathode 1, and the external titanium mesh is used as the anode 4, and the specimen is placed in saturated Ca(OH) 2 In the electrolytic solution, a Φ5mm small hole 2 is drilled on the surface of the concrete to the surface of the steel bar, and a rubber hose 6 is used to connect the pressure gauge. In this embodiment, the pressure gauge is composed of a gas receiving bottle 3 and a U-shaped tube, and one end of the rubber hose 6 ...

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Abstract

The invention discloses a method of testing the permeability of the concrete on the surface of a reinforced bar. The method is that a certain amount of hydrogen near the reinforced bar or on the surface of the reinforced bar is released to the outside of the concrete and the pressure decline curve of the hydrogen is used to reflect the permeability of the concrete on the surface of the reinforced bar in a set time. The invention utilizes the pressure decline curve of the hydrogen which is released to the outside of the concrete at the reinforced bar to evaluate the permeability of the concrete on the surface of the reinforced bar, thus the problems of the existing concrete permeability test method that the permeable medium which is added from the outside can not completely reach the surface of the reinforced bar and can not be added to the surface of the concrete in the water or tidal zone and the permeability of the concrete on the surface of the reinforced bar can be accurately evaluated. The invention can be widely used in the permeability tests of the concrete on the surface of the reinforced bars of concrete structures in the fields such as industrial or civil building, water conservancy, electric power, railway and traffic.

Description

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Claims

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Application Information

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Owner SOUTH CHINA UNIV OF TECH
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