CN103698190A - Dip dyeing method for preparation of concrete microanalysis sample under normal temperature and pressure - Google Patents

Dip dyeing method for preparation of concrete microanalysis sample under normal temperature and pressure Download PDF

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Publication number
CN103698190A
CN103698190A CN201210470819.5A CN201210470819A CN103698190A CN 103698190 A CN103698190 A CN 103698190A CN 201210470819 A CN201210470819 A CN 201210470819A CN 103698190 A CN103698190 A CN 103698190A
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China
Prior art keywords
concrete
dip dyeing
sample
fluorescence
micro
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CN201210470819.5A
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Chinese (zh)
Inventor
李曙光
陈改新
鲁一晖
田军涛
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China Institute of Water Resources and Hydropower Research
Beijing IWHR KHL Co Ltd
Original Assignee
China Institute of Water Resources and Hydropower Research
Beijing IWHR KHL Co Ltd
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Application filed by China Institute of Water Resources and Hydropower Research, Beijing IWHR KHL Co Ltd filed Critical China Institute of Water Resources and Hydropower Research
Priority to CN201210470819.5A priority Critical patent/CN103698190A/en
Publication of CN103698190A publication Critical patent/CN103698190A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a dip dyeing method for preparation of a concrete microanalysis sample under normal temperature and pressure, and the method can perform dip dyeing on a concrete microstructure (microcracks and air holes) under ordinary laboratory conditions. The method includes: firstly soaking a concrete slice sample in a fluorescence liquid solution, then daubing another fluorescence liquid material that can harden and consolidate in microcracks and air holes on the sample surface uniformly, thus finishing dip dyeing. The method disclosed by the invention is simple to operate, and has no need for heating, vacuum pumping or high pressure applying and other relevant devices or equipment. While strengthening the contrast of the microstructure and the matrix in a concrete fluorescence microscopic image, the method maximumly avoids interference to the original microstructure of concrete during dip dyeing, and improves the reliability of microanalysis results.

Description

The dip dyeing method of preparing concrete micro-analysis sample under normal temperature and pressure
Technical field
The present invention relates to prepare under a kind of normal temperature and pressure the dip dyeing method of concrete micro-analysis sample, can under the condition of conventional test chamber, to concrete microstructure (micro-crack and pore), carry out dip dyeing, in strengthening concrete fluorescence microscope images in micromechanism and matrix contrast, avoided to greatest extent the interference to the original micromechanism of concrete in dip dyeing process, improve micro-analysis reliability of structure, be specially adapted to the automatic measuring fractional analysis that utilizes digital image-processing methods to carry out concrete micro-image.
Background technology
Concrete physico mechanical characteristic and the permanance microstructure characteristic (micro-crack and pore) inner with it is inseparable, so concrete micro-analysis technology is research emphasis and the difficult point of concrete field.Because the contrast of micro-crack, pore and the matrix of inside concrete is not high, so in micro-analysis, need concrete to carry out dip dyeing, to strengthen the contrast of micro-crack in micro-image, pore and matrix, be convenient to identification and the quantitative analysis of micromechanism.Vacuum fluorescence epoxy impregnation method is current comparatively conventional dip dyeing method, but utilize the method in sample making course, to need concrete sample to carry out heat drying, vacuumize or apply HIGH PRESSURE TREATMENT, therefore testing laboratory's relevant device is had relatively high expectations, also easily cause the generation of inside concrete secondary micro-crack, the observation and analysis of impact to original flaw shape state in sample simultaneously.How simplifying dip dyeing process and reducing dip dyeing process is the study hotspot of researcher to the interference of inner microstructure always.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes to prepare under a kind of normal temperature and pressure the dip dyeing method of concrete micro-analysis sample, can simplify dip dyeing process and reduce the interference of dip dyeing process to inner microstructure.
The present invention is simple to operate, does not need concrete to carry out heat drying, vacuumize or apply HIGH PRESSURE TREATMENT, has reduced to greatest extent the artificial interference to sample in dip dyeing process, has improved the reliability of Micro-Structure Analysis result.
Accompanying drawing explanation
Fig. 1 is by the inventive method gained concrete section micro-image one.
Fig. 2 is by the inventive method gained concrete section micro-image two.
Wherein:
1 micro-crack, 2,3 bubbles.
Embodiment
The dip dyeing method of preparing concrete micro-analysis sample under a kind of normal temperature and pressure of the present invention, comprises two steps below:
The first step, concrete section sample is placed in a kind of fluorescence liquid solution and soaks;
Second step, takes out this concrete section sample, and the concrete section sample surfaces after immersion is evenly smeared the fluorescence fluent material that one deck can harden fixed in micro-crack and pore.
The first step is soaked concrete section sample fluorescence liquid solution used and is configured and form according to a certain percentage by fluorescent dye and water-soluble liquid, due to the mutual solubility with water, in immersion process, fluorescence liquid solution cements out the free water in concrete substrate be filled in pore and micro-crack.The described fluorescence liquid solution that is used for soaking concrete sample can be also the solution being formed by fluorescent dye and alcohol configuration
In second step, smear fluorescence fluent material and also inner fluorescent dye material is played to the effect of sealing up for safekeeping when filling surface pores.This fluorescence fluent material is fluorescent polymer.Preferably, this fluorescence fluent material is the fluorescence epoxy resin being comprised of epoxy resin, rigidizer and fluorescent dye.
In the dip dyeing process of above-mentioned whole concrete section sample, all under the condition of conventional test chamber, carry out, do not need concrete section sample to carry out heat drying, vacuumize or apply high pressure.
A specific embodiment of the inventive method is:
Cut out the thick square of 20mm section (length of side 10cm) living through deteriorated concrete (concrete test block in this example had born the compressive load that is subject to that is equivalent to its compressive strength 70%) inside, after polishing, cleaning, be soaked in the closed container that fills fluorescence liquid solution (fluorescent dye and alcohol are formed for 1:99~1:9 mixed preparing by volume) 3~7 days; Taking out section dries at room temperature until alcohol volatilizees completely; On the sightingpiston of sample, coat the fluorescence epoxy resin of skim 0.1% concentration (quality of fluorescent dye and epoxy resin is 1:1000); After epoxy cure, the slice surface of polishing is gently removed unnecessary epoxy.Section after polishing is placed under fluorescent microscope and is observed, and the fluorescence microscopy picture of gained is shown in Fig. 1 and Fig. 2 (being 40 times of enlargement factors), by Fig. 1 and Fig. 2, can clearly see micro-crack 1 and the pore 2,3 in concrete.In Fig. 1, white stria is micro-crack 1, containing two white stripes of different in width.In Fig. 2, white stria is micro-crack 1, and white circular spot is bubble 2,3.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of making within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (9)

1. a dip dyeing method of preparing concrete micro-analysis sample under normal temperature and pressure, is characterized in that comprising two steps below:
The first step, is placed in the concrete sample of cutting into slices a kind of fluorescence liquid solution and soaks;
Second step, takes out this concrete section sample, and this concrete section sample surfaces after immersion is evenly smeared the fluorescence fluent material that one deck can harden fixed in micro-crack and pore.
2. under normal temperature and pressure as claimed in claim 1, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that it is the solution being formed by fluorescent dye and water-soluble liquid configuration that the fluorescence liquid solution of concrete sample is soaked in described being used for.
3. under normal temperature and pressure as claimed in claim 1, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that it is the solution being formed by fluorescent dye and alcohol configuration that the fluorescence liquid solution of concrete sample is soaked in described being used for.
4. under normal temperature and pressure as claimed in claim 3, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that described fluorescence liquid solution forms fluorescent dye and alcohol by volume for 1:99 to 1:9 mixed preparing.
5. under normal temperature and pressure as claimed in claim 1, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that the described fluorescence fluent material that can harden fixed is fluorescent polymer in micro-crack and pore.
6. under normal temperature and pressure as claimed in claim 1, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that the fluorescence epoxy resin of the described fluorescence fluent material that can harden fixed for being formed by epoxy resin, rigidizer and fluorescent dye in micro-crack and pore.
7. under normal temperature and pressure as claimed in claim 6, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that, in described fluorescence epoxy resin, the mass ratio of fluorescent dye and epoxy resin is 1:1000.
8. under normal temperature and pressure as claimed in claim 1, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that all under the condition of conventional test chamber, carrying out in the dip dyeing process of whole concrete section sample, do not need concrete section sample to carry out heat drying, vacuumize or apply high pressure.
9. under normal temperature and pressure as claimed in claim 1, prepare the dip dyeing method of concrete micro-analysis sample, it is characterized in that:
In the first step, the sample of concrete being cut into slices is placed in the closed container 3~7 days that fills described fluorescence liquid solution; Described fluorescence liquid solution forms fluorescent dye and alcohol by volume for 1:99~1:9 mixed preparing;
In second step, take out this concrete section sample, dry at room temperature until alcohol volatilizees completely, this concrete section sample surfaces after immersion is evenly smeared fluorescence fluent material described in one deck; Described fluorescence fluent material is the fluorescence epoxy resin being comprised of epoxy resin, rigidizer and fluorescent dye; In described fluorescence epoxy resin, the mass ratio of fluorescent dye and epoxy resin is 1:1000.
CN201210470819.5A 2012-11-20 2012-11-20 Dip dyeing method for preparation of concrete microanalysis sample under normal temperature and pressure Pending CN103698190A (en)

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CN201210470819.5A CN103698190A (en) 2012-11-20 2012-11-20 Dip dyeing method for preparation of concrete microanalysis sample under normal temperature and pressure

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CN201210470819.5A CN103698190A (en) 2012-11-20 2012-11-20 Dip dyeing method for preparation of concrete microanalysis sample under normal temperature and pressure

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108254294A (en) * 2018-03-26 2018-07-06 杭州培聚教育科技有限公司 The visualization of cement-based material crack water absorption course and water absorption rate measuring device and method
CN111751188A (en) * 2020-07-08 2020-10-09 郑州大学 Macroscopic fracture mechanical analysis method for large-mixing-amount rubber concrete

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0196541A (en) * 1987-10-08 1989-04-14 Toagosei Chem Ind Co Ltd Crack detecting agent
US20020187274A1 (en) * 2001-06-11 2002-12-12 Parviz Soroushian Preparation of concrete samples for microscopic analysis
JP2004264233A (en) * 2003-03-04 2004-09-24 Mitsubishi Paper Mills Ltd Method for visualizing crack in concrete member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0196541A (en) * 1987-10-08 1989-04-14 Toagosei Chem Ind Co Ltd Crack detecting agent
JP2551033B2 (en) * 1987-10-08 1996-11-06 東亞合成株式会社 Crack detection agent
US20020187274A1 (en) * 2001-06-11 2002-12-12 Parviz Soroushian Preparation of concrete samples for microscopic analysis
JP2004264233A (en) * 2003-03-04 2004-09-24 Mitsubishi Paper Mills Ltd Method for visualizing crack in concrete member

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
H. HORNAIN等: "《MICROSCOPIC OBSERVATION OF CRACKS IN CONCRETE - A NEW SAMPLE PREPARATION TECHNIQUE USING DYE IMPREGNATION》", 《CEMENT AND CONCRETE RESEARCH》, vol. 26, no. 4, 31 December 1996 (1996-12-31), pages 576 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108254294A (en) * 2018-03-26 2018-07-06 杭州培聚教育科技有限公司 The visualization of cement-based material crack water absorption course and water absorption rate measuring device and method
CN108254294B (en) * 2018-03-26 2024-05-10 杭州科以才成科技有限公司 Device and method for visualization and water absorption rate measurement of crack water absorption process of cement-based material
CN111751188A (en) * 2020-07-08 2020-10-09 郑州大学 Macroscopic fracture mechanical analysis method for large-mixing-amount rubber concrete
CN111751188B (en) * 2020-07-08 2023-01-10 郑州大学 Macroscopic fracture mechanical analysis method for large-mixing-amount rubber concrete

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Application publication date: 20140402