CN101482396A - Measuring method for cellular concrete surface pore diameter - Google Patents
Measuring method for cellular concrete surface pore diameter Download PDFInfo
- Publication number
- CN101482396A CN101482396A CNA2008102184466A CN200810218446A CN101482396A CN 101482396 A CN101482396 A CN 101482396A CN A2008102184466 A CNA2008102184466 A CN A2008102184466A CN 200810218446 A CN200810218446 A CN 200810218446A CN 101482396 A CN101482396 A CN 101482396A
- Authority
- CN
- China
- Prior art keywords
- cellular concrete
- image
- concrete surface
- aperture
- pore diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
Abstract
The invention provides a simple method for determining the aperture of porous concrete combining the CCD imaging technology in digital camera or video camera, image processing and statistics analysis. The method comprises the following steps: acquiring the digital image of porous concrete surface by digital camera; performing gray scale treatment to the acquired image by a image analysis software to obtain a black white binarization image; calculating equivalent aperture; filtering the obtained aperture data and importing into the statistics analysis software to obtain the frequency distribution and normal state curve map of the surface equivalent aperture in this specification; and calculating the average aperture. The invention can effectively reduce the imaging cost and needed time with little loss in precision, and achieves good effect.
Description
Technical field
The invention belongs to field of measuring technique, particularly a kind of assay method of cellular concrete surface pore diameter.
Background technology
Cellular concrete is because of the good acoustically effective of tool, water-permeable and air permeable performance, as materials such as sound insulation, pavement of road, artificial marine habitats and obtain widespread use.
For obtaining certain aperture and voidage, cellular concrete generally adopts simple grain level aggregate to make, and according to different application requirements, aggregate size is many between 2.5～40mm, therefore how uneven the Free Surface of cellular concrete is, particularly evident when aggregate size is big.The aperture is the important parameter of cellular concrete, directly has influence on permeable, ventilative and other various functions of cellular concrete.When porosint was in the past studied, complicated more than the surface pore because of the material internal hole, general many supposition hole tool isotropy characteristics were promptly represented whole porosint with the surface pore feature with being without loss of generality.And the complicacy of cellular concrete surface makes that the accurate measurement of its surface apertures is very difficult, lacks effective measuring method so far always.At present, the cellular concrete surface pore diameter that rarely has is measured two kinds of basic ideas: the one, and direct method is as the inscription rubbing method; Another kind is an indirect method, by measuring the average pore size that parameters such as voidage and infiltration coefficient characterize cellular concrete.More or less there is performance difficulty in direct method, the problem that accuracy is difficult to guarantee, and the rationality of indirect method also lacks verification experimental verification.
Summary of the invention
In order to solve the weak point that above-mentioned prior art exists, the object of the present invention is to provide a kind of method of simple and easy to do mensuration aperture of porous concrete combining.
Purpose of the present invention is achieved through the following technical solutions: a kind of aperture of porous concrete combining assay method is the CCD imaging technique that utilizes digital photographing or video camera, and combining image is handled and cellular concrete surface pore diameter is measured in statistical study.
Above-mentioned aperture of porous concrete combining assay method specifically comprises the steps:
(1) cellular concrete surface is provided with scale, the digital picture of the cellular concrete of the CCD imaging technique affix chi of employing digital photographing or video camera, and effect is as the criterion with effective differentiation hole and entity.
(2) picture shot is carried out gray scale with image analysis software and handle, obtain calculating effective aperture behind the black and white binary image.
(3) the aperture data that obtain are carried out filtration treatment, the micropore data of diameter＜1.0mm are given up without exception;
(4) will handle after filtration in the surface apertures data importing statistical analysis software of back acquisition, the frequency that obtains the surperficial effective aperture of this kind specification distributes and normal curve figure, calculates average pore size thus.
To better implement the present invention,
In the above-mentioned steps (1), the process of obtaining the digital picture of cellular concrete is to adopt distance element to take under well-lighted condition.
Above-mentioned distance element is taken and is adopted the main incident ray angle substantially parallel with the cellular concrete section.
Above-mentioned steps (2) is picture shot to be carried out gray scale with Photoshop software to original image handle, and obtains the black and white binary image; The black and white binary image that obtains imports Image Pro Plus software, calculates the effective aperture data.
In the above-mentioned steps (4), statistical analysis software is selected SPSS for Windows for use.
Compared with prior art, the present invention has following beneficial effect: the present invention utilizes CCD (Charge-Coupled Detector) imaging technique of digital photographing or video camera, combining image is handled and statistical analysis software is measured cellular concrete surface pore diameter, under the little prerequisite of loss of significance, can effectively be lowered into picture expense and required time, obtain good effect.
Description of drawings
Fig. 1 is the former figure of porous concrete specimens sample.
Fig. 2 is a porous concrete specimens black and white binary image.
Fig. 3 is that the frequency in porous concrete specimens aperture distributes and normal curve figure.
Fig. 4 is the former figure of porous concrete specimens sample.
Fig. 5 is a porous concrete specimens black and white binary image.
Fig. 6 is that the frequency in porous concrete specimens aperture distributes and normal curve figure.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further concrete description, but embodiments of the present invention are not limited thereto.
Embodiment 1
Sub-elect the rubble of 5～10mm and two kinds of size fractionated of 10～16mm by different apertures square hole screen, press water cement ratio 0.3 according to forefathers' experience, cement-aggregate ratio 1:8 ratio becomes porous concrete specimens with 42.5 Portland cement manual manufacture.Its external mold makes with the pvc pipe of Φ 160 * 4mm, pipe range 30cm; Porous concrete specimens is cylindric, thickness 15cm, and every kind of 30 of specification making is standby.
Adopt Pentax Optio S40 digital camera, select the stronger period of light, adopt the main incident ray angle substantially parallel with the test specimen section, operating distance is that the distance element of 30.0cm is taken, obtain the former figure of test specimen sample surfaces, wherein the set of diagrams sheet of each test specimen (for ease of showing the actual size of test specimen, utilizes Photoshop6.0 software to add new scale according to former length of the scale among each figure) as shown in Figure 1.
Utilize softwares of Photoshop 6.0, original image is carried out the black and white binary conversion treatment, obtain set of diagrams picture (, utilizing Photoshop6.0 software to add new scale according to former length of the scale among each figure) as shown in Figure 2 for ease of showing the actual size of test specimen.
Black and white binary image (not containing scale) is imported Image Pro Plus 5.1 softwares, gray scale threshold values (R120, G120, B120) operation is set, select " diameter " to measure, obtain the surperficial effective aperture data of the cellular concrete of different-grain diameter aggregate making; Again with surperficial effective aperture in each sample〉the data importing SPSS 13.0 for Windows softwares of 1mm, the frequency that can obtain the surperficial effective aperture of 5～10mm and 10～16mm sample distributes and normal curve figure, and the result is as shown in Figure 3.
As shown in Figure 3, the surface pore average pore size of 5～10mm and 10～16mm sample is respectively 3.20mm, 4.29mm.
Sub-elect the rubble of 16～20mm, 20～25mm and three kinds of size fractionated of 25～32mm by different apertures square hole screen, press water cement ratio 0.3 according to forefathers' experience, cement-aggregate ratio 1:8 ratio becomes porous concrete specimens with 42.5 Portland cement manual manufacture.Its external mold makes with the pvc pipe of Φ 250 * 4mm, pipe range 15cm; Porous concrete specimens is cylindric, thickness 9cm, and every kind of 20 of specification making is standby.
Adopt Pentax Optio S40 digital camera, select the stronger period of light, adopt the main incident ray angle substantially parallel with the test specimen section, operating distance is that the distance element of 30.0cm is taken, obtain the former figure of test specimen sample surfaces, wherein the set of diagrams sheet of each test specimen is illustrated in figure 4 as (for ease of showing the actual size of test specimen, utilizing Photoshop6.0 software to add new scale according to former length of the scale among each figure).
Utilize softwares of Photoshop 6.0, original image is carried out the black and white binary conversion treatment, obtain set of diagrams picture (, utilizing Photoshop6.0 software to add new scale according to former length of the scale among each figure) as shown in Figure 5 for ease of showing the actual size of test specimen.
Black and white binary image (not containing scale) is imported Image Pro Plus 5.1 softwares, gray scale threshold values (R120, G120, B120) operation is set, select " diameter " to measure, obtain the surperficial effective aperture data of the cellular concrete of different-grain diameter aggregate making; Again with surperficial effective aperture in each sample〉the data importing SPSS 13.0 for Windows softwares of 1mm, the frequency that can obtain the surperficial effective aperture of 5～10mm and 10～16mm sample distributes and normal curve figure, and the result is as shown in Figure 6.
As shown in Figure 6, the surface pore average pore size of 16～20mm, 20～25mm and 25～32mm is respectively 6.71mm, 7.75mm and 9.65mm.
Claims (5)
1, a kind of assay method of cellular concrete surface pore diameter is characterized in that comprising following concrete steps:
(1) cellular concrete surface is provided with scale, and the CCD imaging technique of employing digital photographing or video camera obtains the digital picture of the cellular concrete of affix chi;
(2) picture shot is carried out gray scale with image analysis software and handle, obtain calculating effective aperture behind the black and white binary image;
(3) the aperture data that obtain are carried out filtration treatment, the micropore data of diameter＜1.0mm are given up without exception;
(4) will handle after filtration in the surface apertures data importing statistical analysis software of back acquisition, the frequency that obtains the surperficial effective aperture of this kind specification distributes and normal curve figure, calculates average pore size thus.
2, the assay method of cellular concrete surface pore diameter according to claim 1 is characterized in that: in the described step (1), the process of obtaining the digital picture of cellular concrete is to adopt distance element to take under well-lighted condition.
3, the assay method of cellular concrete surface pore diameter according to claim 2 is characterized in that: described distance element is taken and is adopted the main incident ray angle substantially parallel with the cellular concrete section.
4, the assay method of cellular concrete surface pore diameter according to claim 1 is characterized in that: described step (2) is picture shot to be carried out gray scale with Photoshop software to original image handle, and obtains the black and white binary image; The black and white binary image that obtains imports Image Pro Plus software, calculates the effective aperture data.
5, the assay method of cellular concrete surface pore diameter according to claim 1 is characterized in that: in the described step (4), statistical analysis software is selected SPSS for Windows for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102184466A CN101482396A (en) | 2008-10-20 | 2008-10-20 | Measuring method for cellular concrete surface pore diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102184466A CN101482396A (en) | 2008-10-20 | 2008-10-20 | Measuring method for cellular concrete surface pore diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101482396A true CN101482396A (en) | 2009-07-15 |
Family
ID=40879608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102184466A Pending CN101482396A (en) | 2008-10-20 | 2008-10-20 | Measuring method for cellular concrete surface pore diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101482396A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267516A (en) * | 2013-02-27 | 2013-08-28 | 北京林业大学 | Sample plot measuring technology by using digital camera as tool |
| CN103411866A (en) * | 2013-07-15 | 2013-11-27 | 同济大学 | Pore structure analysis method for foam concrete |
| CN107621436A (en) * | 2017-10-11 | 2018-01-23 | 云南省交通规划设计研究院 | A kind of cement concrete pore property analysis system and its method of testing |
| CN107655807A (en) * | 2017-09-13 | 2018-02-02 | 广西大学 | The permeable method for analyzing efficiency of pervious concrete based on heavy slurry index |
| CN107864770A (en) * | 2017-09-21 | 2018-04-03 | 中南林业科技大学 | A kind of vegetation form cellular concrete vegetation implantation methods based on aperture grading |
| CN108918357A (en) * | 2018-06-29 | 2018-11-30 | 浙江工业大学 | A kind of simple and easy method of application slice photocopy analysis permeable pavement material pore-size distribution |
| CN109509176A (en) * | 2018-10-15 | 2019-03-22 | 南京交通职业技术学院 | The recognition methods and voidage calculation method of effective connectivity gap in porous pavement |
| CN109738473A (en) * | 2018-12-20 | 2019-05-10 | 云南大学 | A method of measurement porous material stomata tortuosity |
-
2008
- 2008-10-20 CN CNA2008102184466A patent/CN101482396A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267516A (en) * | 2013-02-27 | 2013-08-28 | 北京林业大学 | Sample plot measuring technology by using digital camera as tool |
| CN103411866A (en) * | 2013-07-15 | 2013-11-27 | 同济大学 | Pore structure analysis method for foam concrete |
| CN107655807A (en) * | 2017-09-13 | 2018-02-02 | 广西大学 | The permeable method for analyzing efficiency of pervious concrete based on heavy slurry index |
| CN107655807B (en) * | 2017-09-13 | 2019-12-10 | 广西大学 | Permeable concrete water permeability efficiency analysis method based on slurry sedimentation index |
| CN107864770A (en) * | 2017-09-21 | 2018-04-03 | 中南林业科技大学 | A kind of vegetation form cellular concrete vegetation implantation methods based on aperture grading |
| CN107621436A (en) * | 2017-10-11 | 2018-01-23 | 云南省交通规划设计研究院 | A kind of cement concrete pore property analysis system and its method of testing |
| CN108918357A (en) * | 2018-06-29 | 2018-11-30 | 浙江工业大学 | A kind of simple and easy method of application slice photocopy analysis permeable pavement material pore-size distribution |
| CN109509176A (en) * | 2018-10-15 | 2019-03-22 | 南京交通职业技术学院 | The recognition methods and voidage calculation method of effective connectivity gap in porous pavement |
| CN109738473A (en) * | 2018-12-20 | 2019-05-10 | 云南大学 | A method of measurement porous material stomata tortuosity |
| CN109738473B (en) * | 2018-12-20 | 2022-06-10 | 云南大学 | Method for measuring porous material pore tortuosity factor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101482396A (en) | Measuring method for cellular concrete surface pore diameter | |
| CN104596911A (en) | Method for detecting character of pores of pervious concrete by processing images | |
| Rattanasak et al. | Pore structure of cement/pozzolan composites by X-ray microtomography | |
| CN108844881B (en) | Method for predicting relative permeability coefficient of unsaturated soil based on VG model | |
| CN102590483B (en) | The method of testing of setting time of cement-based material | |
| CN103575751A (en) | Characterization method of pore structure of porous concrete based on CT (Computerized Tomography) technology | |
| CN107807082B (en) | Method for measuring gaps of cross section of asphalt mixture based on laser scanning | |
| CN103076347B (en) | Measurement method for mechanical injury of brittle material based on in-situ X-ray tomography | |
| CN109142189A (en) | A kind of macro thin view hole structure recognition of cement-based material and evaluation method | |
| Wang et al. | Characterizing frost damages of concrete with flatbed scanner | |
| Rao et al. | Vertical distribution of pore-aggregate-cement paste in statically compacted pervious concrete | |
| CN113155042A (en) | Method for measuring thickness of transition zone of concrete internal interface | |
| CN105588546A (en) | Method and system for measuring slurry shape parameters and changes of slurry shape parameters over time | |
| CN114544717B (en) | ECT quantitative monitoring water transmission method | |
| CN108535156A (en) | Test method is continuously tracked in cement material degree of hydration | |
| JP2011153924A (en) | Method for estimating compression strength of concrete cured body | |
| CN114092661B (en) | CT imaging technology-based three-dimensional reconstruction method for internal damage of concrete material | |
| Segura et al. | Measurement of the degraded depth in cementitious materials by automatic digital image processing | |
| CN113640324B (en) | Local porosity characterization method combining tomography imaging and enhanced contrast | |
| CN104181289B (en) | Method for measuring concrete surface layer moisture distribution | |
| JP3866257B2 (en) | Method and apparatus for measuring three-dimensional shape and opening width of crack | |
| CN113341113B (en) | Method for matching corresponding drying shrinkage under humidity gradient in cement-based material | |
| CN204389019U (en) | A kind of high resolving power multiwavelength laser intensity distribution detection device | |
| Kurumisawa et al. | Three-dimensional visualization of pore structure in hardened cement paste by the gallium intrusion technique | |
| CN112285136B (en) | X-ray measuring method for instantly tracking two-dimensional water absorption process of concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090715 |