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Method for measuring concrete pore structure and dedicated forming device

A technology for forming devices and pore structures, applied in measuring devices, material analysis using wave/particle radiation, instruments, etc., can solve the problems of inaccurate concrete pore structure, limited application of highly toxic substances, etc., and achieve the effect of avoiding damage

Active Publication Date: 2017-11-17
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The present invention provides a method for measuring the pore structure of concrete, which solves the technical problems of inaccurate determination of the pore structure of concrete and limited application of highly toxic substances

Method used

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  • Method for measuring concrete pore structure and dedicated forming device
  • Method for measuring concrete pore structure and dedicated forming device
  • Method for measuring concrete pore structure and dedicated forming device

Examples

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Embodiment Construction

[0020] The invention is further invented below in conjunction with the drawings.

[0021] Such as Figure 1-4 As shown, the pore structure of P·I52.5 Portland cement is used for the determination, the Portland cement is mixed with 1000g cement and 600g into the slurry to be tested, and the slurry to be tested is first injected into the molding device. In the centrifugal tube 1 of the forming device, cover the centrifugal tube plug 3 with a rod. After the slurry has solidified and hardened, remove the centrifugal tube plug 3 with a rod and cover the centrifuge tube cap 4 for 14 days of maintenance. After curing, the centrifuge tube cap 4 Take it down, terminate the hydration with alcohol, and then put it into a vacuum drying box for drying. The drying time and temperature are set according to the slurry to be tested. The drying process of the Portland cement to be tested is set to 65 Drying for 3 days under the condition of ℃, the sample with the cavity is obtained; then the tempe...

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Abstract

The invention discloses a method of measuring the concrete pore structure. The method comprises the following steps: pouring slurry to be measured into a forming device, after the slurry solidifies, carrying out maintenance for a required period; adopting a solvent to stop hydration, drying the mould in a vacuum drying box to obtain a sample with a cavity; melting temperature variable alloy, pouring alloy into the cavity of the dried sample, placing the sample in a thermal insulation apparatus, placing the sample on a centrifuge to carry out a centrifugal treatment to obtain a sample with a measurable pore structure, and using electron microscope and CT to measure the positions, which are occupied by the temperature variable alloy, of the sample, namely the pore structure. The molten temperature variable alloy is pressed into the pores by the centrifugal force, the shortage that the pore structure is broken by a conventional sampling method is avoided; moreover, the temperature variable alloy is nontoxic and harmless, no pollution is generated during the operation process, the human body is not harmed, the pore structure of concrete is not changed, and the reality of the concrete pore structure is represented.

Description

Technical field [0001] The invention relates to a method and a device for testing concrete material properties, in particular to a method and a forming device for determining the pore structure of concrete. Background technique [0002] Concrete is the most important building material today and is widely used in construction, transportation, bridges, water conservancy, underground engineering and other fields. With the rapid development of the global economy and unprecedented scale of construction, the amount of concrete used has increased year by year, which is particularly prominent for China with its rapid economic development. The direct economic losses caused by the durability of concrete components in the service process are very huge. In recent years, the premature failure of concrete structures in my country has occurred from time to time. This has not only caused a large loss of national wealth, but also caused a great waste of resources and energy. , And more serious, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38G01N23/00
Inventor 张云升钱如胜
Owner SOUTHEAST UNIV
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