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Method for Measuring Concrete Pore Structure and Special 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: 2019-08-20
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 Special Forming Device
  • Method for Measuring Concrete Pore Structure and Special Forming Device
  • Method for Measuring Concrete Pore Structure and Special Forming Device

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention is further invented.

[0021] like Figure 1-4 As shown, the measurement adopts the pore structure of P.I52.5 Portland cement, Portland cement is made into the slurry to be tested with a ratio of 1000g cement and 600g, and the slurry to be tested is first injected into the molding device. In the centrifuge tube 1 of the forming device, cover the centrifuge tube plug 3 with a rod, remove the centrifuge tube plug 3 with a rod after the slurry has solidified and harden, and cover the centrifuge tube cap 4, and maintain for 14 days. After curing, remove the centrifuge tube cap 4 Take it off, stop 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 at 65 ℃ for 3 days to obtain a dried sample with a cavity; then melt the temperature-changin...

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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 concrete material performance testing method and device, in particular to a method and a forming device for measuring the concrete pore structure. Background technique [0002] Concrete is the most important building material today, widely used in construction, transportation, bridges, water conservancy, underground engineering and other fields. With the rapid development of the global economy and unprecedented construction scale, the consumption of concrete is increasing year by year, which is especially prominent in China, where the economy is developing rapidly. The direct economic loss caused by the durability of concrete components during service is very huge. In recent years, premature failure of concrete structures has occurred frequently in our country, which not only leads to a large loss of national wealth, but also causes a great waste of resources and energy. , and more seriously caused a large number of casualti...

Claims

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Application Information

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