Concrete in-situ non-destructive gas permeability measurement device as well as method

A gas permeability, concrete technology, used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems such as inapplicability

Active Publication Date: 2013-09-25
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to provide an in-situ non-destructive gas permeability measurement device and method for concret...

Method used

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  • Concrete in-situ non-destructive gas permeability measurement device as well as method
  • Concrete in-situ non-destructive gas permeability measurement device as well as method
  • Concrete in-situ non-destructive gas permeability measurement device as well as method

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Embodiment Construction

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] see figure 1 , figure 1 It is a structural diagram of an embodiment, including the following components:

[0024] 1—Concrete component, 2—Gas collecting hood, 3—Aeration valve, 4—Gas pressure transmitter, 5—Desiccant, 6—Filter, 7, 8, 11 and 12—Valve, 9 and 10—Different ranges Gas mass flow controller, 13—vacuum pump, 14—parallel data line of gas mass flow controller, 15—data line of gas mass flow controller, 16—data line of gas pressure transmitter, 17—data acquisition controller, 18— sealant application area;

[0025] An in-situ non-destructive gas permeability measurement device for concrete in an embodiment, comprising:

[0026] The air collecting hood 2 is used for bonding on the concrete surface to be tested to form a closed space;

[0027] The gas pressure transmitter 4 is installed on the outer surface of the gas c...

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Abstract

The invention provides a concrete in-situ non-destructive gas permeability measurement method. The device comprises a gas collecting hood, a gas pressure transmitter, a gas quality and flow rate controller, a vacuum pump, a plurality of valves and a controller, wherein the gas collecting hood is used for being bonded on the surface of to-be-tested concrete so as to form a sealed space; the gas pressure transmitter is installed on the outer surface of the gas collecting hood, and is used for collecting the pressure in the gas collecting hood when the gas collecting hood is at the negative pressure state; the gas quality and flow rate controller is installed on a pipeline between the gas collecting hood and the vacuum pump, and is used for detecting and controlling the current gas flow rate; the vacuum pump is used for extracting gases in the gas collecting hood, passing through the gas quality and flow rate controller; the plurality of valves are installed on the pipeline, and are used for controlling the gas on the pipeline to pass through; the controller is connected with the gas pressure transmitter and the gas quality and flow rate controller, and determines the gas permeability of concrete through parameters sensed by the gas pressure transmitter and the gas quality and flow rate controller. According to the device and the method, the permeability can be measured under the negative pressure state; the surface of concrete is not damaged; the measurement process is simple.

Description

technical field [0001] The invention relates to concrete testing, in particular to a device and method for measuring in-situ non-destructive gas permeability of concrete. Background technique [0002] The permeability of concrete-like materials (rock, concrete, brick, etc.) is one of the key factors affecting their durability. At present, the permeability measurement methods are distinguished according to the selected permeation medium, which can be divided into two types: liquid and gas, and the corresponding test methods are hydraulic pressure test and air pressure test method. [0003] According to the measurement method, it can be divided into two types: sampling and non-sampling. ① At present, the premise of sampling is to test the permeability of concrete specimens in the laboratory. This kind of experimental method is generally a destructive experiment. For intact concrete specimens, the sampling method destroys the integrity of the concrete components; for damaged ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 李萍王新征牛冠毅赵建伟毛燕杨伟
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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