CN101629817B - Method for analyzing area of cement paste in concrete cross section and length of transition zone - Google Patents
Method for analyzing area of cement paste in concrete cross section and length of transition zone Download PDFInfo
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- CN101629817B CN101629817B CN2009101142795A CN200910114279A CN101629817B CN 101629817 B CN101629817 B CN 101629817B CN 2009101142795 A CN2009101142795 A CN 2009101142795A CN 200910114279 A CN200910114279 A CN 200910114279A CN 101629817 B CN101629817 B CN 101629817B
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Abstract
The invention relates to a method for analyzing the area of cement paste in a concrete cross section and the length of a transition zone. The method comprises the following steps: cutting or splitting a concrete test block to obtain a cross section; performing vertical shooting to the cross section to obtain an image; processing and analyzing the image of the cross section of the concrete test block by using a computer; rapidly and completely selecting the aggregate area of the concrete cross section and a transition zone area between the aggregate and the cement paste; and accurately calculating the area of the cement paste in the concrete cross section, the aggregate area as well as the ratio of the aggregate area occupying the concrete cross section as well as the length of the transition zone on the basis. And therefore, the invention avoids the defects of low efficiency, low accuracy and the like due to the manual operation and the manual measure in the traditional method.
Description
One, technical field
The present invention relates to a kind of analytical approach of building materials, the method for particularly a kind of analyzing area of cement paste in concrete cross section and length of transition zone.
Two, background technology
Concrete after the moulding is made up of aggregate and cement slurry, the water, solution, the gas that enter inside concrete can partly spread by the cement slurry in concrete, zone of transition between aggregate and the cement slurry can provide express passway for the diffusion of above-mentioned substance in concrete, and its diffusion is not considered in the aggregate zone usually because coefficient of diffusion is very little.So, concrete perviousness, resisting chloride ion penetration diffusion, carbonation properties etc. are directly related with cement slurry and transitional region in the concrete, therefore accurately measure the area of cement paste and the length of transition zone of concrete cross section, help accurately to calculate concrete effective diffusion zone and diffusion parameter, and evaluate concrete permanance in view of the above.
At present, the aggregate region area that calculates concrete cross section adopts paper disk method usually, it is that translucent blank sheet of paper is covered on concrete cross section, depict concrete cross section aggregate distribution plan, on behalf of the blank sheet of paper in aggregate zone, will scheme to go up cut again, its quality of weighing can get the gained quality divided by the mass area ratio of this paper the aggregate area of concrete cross section.
Length of transition zone on the analytical calculation concrete cross section adopts the cotton thread method usually, it is the edge that the cotton thread that will be soaked with tackifier is around in each aggregate on the concrete cross section, measures the length of continuous line around whole aggregates then and obtains on the concrete cross section length of zone of transition between the aggregate and cement slurry.
Above-mentioned paper disk method and cotton thread method all rely on craft to cut out stickup and the manual weighing finishes, and not only efficient is low, and low precision.
Three, summary of the invention
The present invention aims to provide a kind of method of analyzing area of cement paste and length of transition zone on the concrete cross section, it can accurately analyze the area of cement paste and the length of transition zone of concrete cross section by computing machine and image processing software, determines the effective diffusion zone of diffusate in concrete in view of the above better.
Of the present inventionly achieve the above object by the following technical programs: the method for a kind of analyzing area of cement paste in concrete cross section and length of transition zone comprises the steps:
(1) concrete test block is severed or is rived, obtain section, described section is vertically taken, obtain image,
(2) utilize Computer Image Processing software described image is chosen whole concrete test block section, concrete cross section laterally or the aggregate zone of vertical dimension and concrete cross section,
(3) set, fill the color of institute's favored area foreground, the concrete cross section that obtain the concrete cross section complete area that is positioned at figure layer 2 that this color indicates, is positioned at figure layer 3 laterally or vertical dimension and the aggregate zone that is positioned at the concrete cross section of figure layer 4, the color of described setting, filling institute favored area foreground is meant the color of setting, fill foreground respectively in figure layer 2～4 each constituency
(4) utilize the pixel shrinkage instrument of Computer Image Processing software, the processing of 1 pixel shunk in the aggregate district that selectes in the figure floor 4, delete this regional center section then, obtain the zone of transition between aggregate and cement slurry on figure layer 5 concrete cross section,
(5) utilize the computed image process software to read figure layer 2～5 each figure layer pixel value respectively, the ratio of the actual value by each figure layer pixel value and the concrete total area and diameter length calculates the length of transition zone between aggregate area, the aggregate shared section ratio in zone and the aggregate and the cement slurry of concrete test block section.
The concrete cross section of described concrete cross section for adopting machine cuts, grinding machine polishing or splitting instrument splitting concrete to obtain.
The color of described foreground is a kind of solid color in the software.
The present invention will the zone in having graphics process accurately chooses in the image processing software of the function that reads with pixel and finishes, and this type of software must be installed in personal computer in advance.
Outstanding advantage of the present invention is:
Compare with the cotton thread method with traditional paper disk method, the present invention not only is suitable for section rule, ganoid section, and can be under irregular, shaggy concrete cross section condition, utilize that computing machine and image processing software carry out accurately, the aggregate area, ratio and the length of transition zone that the aggregate zone accounts for section of analytical calculation concrete cross section intuitively, avoided defectives such as low precision that paper disk method and the utilization of cotton thread method manual operations and artificial tolerance brings, poor efficiency, provide convenient effective method for studying concrete diffusion and permanance better.
Four, description of drawings
Fig. 1 is the photographic images of circular concrete test block section
Fig. 2 is the analysis image in circular concrete test block section total area zone
Fig. 3 is the analysis image of circular concrete test block vertical extension
Fig. 4 is the analysis image in circular concrete test block section aggregate zone
Fig. 5 is the analysis image in the zone of transition zone of circular concrete test block section
Fig. 6 is the photographic images of Rectangular Concrete test block section
Fig. 7 is the analysis image in Rectangular Concrete test block section total area zone
Fig. 8 is the analysis image of Rectangular Concrete test block vertical extension
Fig. 9 is the analysis image in Rectangular Concrete test block section aggregate zone
Figure 10 is the analysis image in the zone of transition zone of Rectangular Concrete test block section
Five, embodiment
By the following examples technical scheme of the present invention is described in further detail.
Graphical analysis among the embodiment is mainly at Adobe
Photoshop
Finish in CS 2.0 image processing softwares, this software must be installed in personal computer in advance.
Embodiment 1
1, Fig. 1 carries out machine cuts with cutting machine to concrete test block, section is vertically taken the picture that obtains with digital camera.
2, Fig. 2 opens Adobe
Photoshop
CS 2.0 image processing softwares, choose the section of whole concrete test block with " the oval select tool " in the toolbar, the color of foregrounding look is red in toolbar, press " Shift+Ctrl+N " newly-built figure layer, obtain figure layer 2, and in figure layer 2, the filling of foreground is carried out in the constituency with " Alt+Del " key, can obtain concrete test block total area zone.
3, Fig. 3 hides Layers 2, uses Adobe
Photoshop
" single column marquee tool " in CS 2.0 toolbars chosen at concrete vertical dimension maximum, and accurately revise the constituency with " rectangular marquee ", make this constituency be the known vertical dimension length of concrete test block just, press " Shift+Ctrl+N " newly-built figure layer, obtain figure layer 3, and carry out the filling of foreground in 3 a pairs of constituency of figure layer with " Alt+Del " key, can obtain the concrete test block vertical extension.
4, Fig. 4 hides Layers 3, uses Adobe
Photoshop
" magic wand tool " in CS 2.0 toolbars tentatively chosen the aggregate zone.After tentatively choosing, with selection tool the edge, constituency is accurately revised again, pressed " Shift+Ctrl+N " newly-built figure layer, obtain figure layer 4, and carry out the filling of foreground in 4 pairs of constituency of newly-built figure layer with " Alt+Del " key, can obtain the aggregate zone of concrete test block section.
5, Fig. 5 is that duplicate layer 4 is to figure layer 5, hide Layers 4, choose figure layer 5, to scheme layer zone of last display foreground look with selection tool and be established as the constituency, click " selection "＞" modification "＞" contraction " in the menu, utilize " constituency pucker tool " that the foreground zone is shunk, the scope of setting " constituency contraction " is 1 pixel, after the processing of on the basis in constituency last time the constituency being shunk 1 pixel,, can obtain the transitional region of the concrete test block section represented as red lines among the figure with " Del " key deletion zone line.
6, choose figure layer 2, figure layer 3, figure layer 4 and figure layer 5 respectively, and read the pixel value of figure layer 2, figure layer 3, figure layer 4 and figure layer 5 in the information on " the figure layer of the selection " hurdle in histogram window respectively, the pixel value that present embodiment reads is as shown in table 1.
7, the test block of using in the present embodiment is the cylindrical concrete test block of Φ 80 * 50mm, and its cross section diameter is 80mm, learns that through calculating its area is 5026.5mm
2According to the figure layer pixel value and the ratio of the concrete total area and diameter length actual value of the figure layer 2 that reads, figure layer 3, figure layer 4 and figure layer 5, calculate the regional shared ratio of aggregate area, aggregate of concrete test block section and the length of transition zone between aggregate and cement slurry.Its result is as shown in table 1.
Table 1 concrete cross section aggregate and zone of transition analysis result
| Analysis project | Pixel value | Actual value |
| The total area | 114328 | 5026.5mm 2 |
| The aggregate area | 42776 | 1880.7mm 2 |
| Area of cement paste | 71552 | 3145.8mm 2 |
| The area of cement paste ratio | 62.6％ | 62.6％ |
| Upper and lower side length | 393 | 80mm |
| Length of transition zone | 6679 | 1359.6mm |
Embodiment 2
1, Fig. 6 vertically takes the picture that obtain with digital camera to section for the concrete cracking test instrument concrete test block is rived, and in order to increase the contrast of aggregate and cement slurry color on the section, has sprayed some water before taking on section.As seen from the figure, the concrete section of riving is very irregular, but does not influence the analysis to area of cement paste on the section and length of transition zone.
2, Fig. 7 opens Adobe
Photoshop
CS 2.0 image processing softwares, choose the section of whole concrete test block with " the rectangle select tool " in the toolbar, the color of foregrounding look is red in toolbar, press " Shift+Ctrl+N " newly-built figure layer, obtain figure layer 2, and in figure layer 2, the filling of foreground is carried out in the constituency with " Alt+Del " key, can obtain concrete test block total area zone.
3, Fig. 8 hides Layers 2, uses Adobe
Photoshop
" single column marquee tool " in CS 2.0 toolbars chosen at concrete vertical dimension maximum, and accurately revise the constituency with " rectangular marquee ", make this constituency be the known vertical dimension length of concrete test block just, press " Shift+Ctrl+N " newly-built figure layer, obtain figure layer 3, and carry out the filling of foreground in 3 a pairs of constituency of figure layer with " Alt+Del " key, can obtain the concrete test block vertical extension.
4, Fig. 9 hides Layers 3, uses Adobe
Photoshop
" magic wand tool " in CS 2.0 toolbars tentatively chosen the aggregate zone, after tentatively choosing, with selection tool the edge, constituency is accurately revised again, press " Shift+Ctrl+N " newly-built figure layer, obtain figure layer 4, and carry out the filling of foreground in 4 pairs of constituency of newly-built figure layer with " Alt+Del " key, can obtain the aggregate zone of concrete test block section.
5, Figure 10 is that duplicate layer 4 is to figure layer 5, hide Layers 4, choose figure layer 5, to scheme layer zone of last display foreground look with selection tool and be established as the constituency, click " selection "＞" modification "＞" contraction " in the menu, utilize " constituency pucker tool " that the foreground zone is shunk, the scope of setting " constituency contraction " is 1 pixel, after the processing of on the basis in constituency last time the constituency being shunk 1 pixel,, can obtain the transitional region of the concrete test block section represented as red lines among the figure with " Del " key deletion zone line.
6, choose figure layer 2, figure layer 3, figure layer 4 and figure layer 5 respectively, and read the pixel value of figure layer 2, figure layer 3, figure layer 4 and figure layer 5 in the information on " the figure layer of the selection " hurdle in histogram window respectively, the pixel value that present embodiment reads is as shown in table 2.
7, the test block of using in the present embodiment is the regular cube concrete test block of 100 * 100 * 100mm, and its section length of side is 100mm, learns that through calculating its area is 10000.0mm
2According to the figure layer pixel value and the ratio of the concrete total area and diameter length actual value of the figure layer 2 that reads, figure layer 3, figure layer 4 and figure layer 5, calculate the regional shared ratio of aggregate area, aggregate of concrete test block section and the length of transition zone between aggregate and cement slurry.Its result is as shown in table 2.
Table 2 concrete cross section aggregate and zone of transition analysis result
| Analysis project | Pixel value (pixel) | Actual value |
| The total area | 217156 | 10000mm 2 |
| The aggregate area | 75362 | 3470.4mm 2 |
| Area of cement paste | 141794 | 6529.6mm 2 |
| The area of cement paste ratio | 65.3％ | 65.3％ |
| Upper and lower side length | 470 | 100mm |
| Length of transition zone | 14170 | 3014.9mm |
Claims (3)
1. the method for analyzing area of cement paste in concrete cross section and length of transition zone is characterized in that, comprises the steps:
(1) concrete test block is severed or is rived, obtain section, described section is vertically taken, obtain image,
(2) utilize Computer Image Processing software described image is chosen whole concrete test block section, concrete cross section laterally or the aggregate zone of vertical dimension and concrete cross section,
(3) set, fill the color of institute's favored area foreground, the concrete cross section that obtain the concrete cross section complete area that is positioned at figure layer 2 that this color indicates, is positioned at figure layer 3 laterally or vertical dimension and the aggregate zone that is positioned at the concrete cross section of figure layer 4, the color of described setting, filling institute favored area foreground is meant the color of setting, fill foreground respectively in figure layer 2～4 each constituency
(4) utilize the pixel shrinkage instrument of Computer Image Processing software, image in the figure layer 4 is copied to figure layer 5 earlier, then selected aggregate district in the figure floor 5 is shunk the processing of 1 pixel, delete this regional center section then, obtain the zone of transition between aggregate and cement slurry on figure layer 5 concrete cross section
(5) utilize the computed image process software to read figure layer 2～5 each figure layer pixel value respectively, the ratio of the actual value by each figure layer pixel value and the concrete total area and diameter length calculates the length of transition zone between aggregate area, the aggregate shared section ratio in zone and the aggregate and the cement slurry of concrete test block section.
2. according to the method for described analyzing area of cement paste in concrete cross section of claim 1 and length of transition zone, it is characterized in that the concrete cross section of described concrete cross section for adopting machine cuts, grinding machine polishing or splitting instrument splitting concrete to obtain.
3. according to the method for described analyzing area of cement paste in concrete cross section of claim 1 and length of transition zone, it is characterized in that the color of described foreground is a kind of solid color in the software.
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| CN103822922B (en) * | 2014-02-11 | 2017-03-29 | 中国水利水电科学研究院 | The quick method for determining mortar/aggregate area fraction in concrete section |
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