CN104101324B - Method for evaluating concrete surface spalling degree - Google Patents
Method for evaluating concrete surface spalling degree Download PDFInfo
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- CN104101324B CN104101324B CN201410379730.7A CN201410379730A CN104101324B CN 104101324 B CN104101324 B CN 104101324B CN 201410379730 A CN201410379730 A CN 201410379730A CN 104101324 B CN104101324 B CN 104101324B
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Abstract
The invention discloses a method for evaluating concrete surface spalling degree. The method for evaluating the concrete surface spalling degree uses mechanical transmission between components of a concrete surface spalling degree measuring apparatus, a probe passes through the spalled concrete surface, the surface profile thereof is reflected to a register plate through a rotating shaft and a connecting bar connected with the probe, and quantitative analysis result of the concrete surface spalling degree is obtained through measuring the length of the surface profile and comparing with the surface outline before spalling. The method for evaluating the concrete surface spalling degree is easy to operate and capable of quickly measuring the roughness of a measured sample, compared with an existing method, the method for evaluating the concrete surface spalling degree is low in measuring cost, quick in measuring speed, easy to observe a test result and high in reliability.
Description
Technical field
The present invention relates to the measuring method of concrete works and test, more particularly to a kind of evaluation concrete surface stripping
The method of the degree that falls.
Background technology
Concrete is one of contemporary topmost civil engineering material.Because it has abundant raw material, cheap, produce work
The simple feature of skill, and consumption is increasing.Concrete also has compression strength height, good endurance, strength grade scope simultaneously
Wide the features such as.These features make its range quite varied, not only use in various civil engineerings, or shipbuilding industry, machine
Tool industry, ocean development, the important materials in geothermal engineering etc..With concrete continuous development in the industry, to concrete
It is more scientific that the evaluation result of property indices needs more accurate, corresponding evaluation method to be accomplished by.
In China, for preventing concrete road surface winter snow cover impact road traffic from normally running, it is to avoid traffic accident, Chang
Cryosel, deicing liquid are spread on road surface eliminating snow melt.Thus deicer salts, deicing liquid can inevitably be connect with concrete road surface
Touch, cause the surface deterioration of concrete to destroy.Therefore in concrete property indices, it is to investigate coagulation that degree is peeled off on surface
One important indicator of soil property amount.
The method being used for evaluating concrete surface peeling degree at present is that " normal concrete is long-term according to gb50082-2009
Performance and endurance quality test method standard " 4 freeze proof experiments in the content of 4.3 one side freeze-thaw methods (or claim salt freeze method) part enter
Row evaluation.This method is concrete to be put into the Frozen-thawed cycled carrying out in one side freezing-thawing test case repeatedly, finally by meter
Calculate mass loss rate in whole frozen-thaw process for the concrete, that is, the quality of concrete surface spall accounts for former coagulation soil property
The percentage of amount peels off degree the surface to evaluate concrete.This method is due to the difference of thawing time, mistake in process of the test
When the difference of water speed, measurement, the not multiple on an equal basis destabilizing factor of air themperature and humidity, can make result of the test occur larger
Deviation, reduces the accuracy of result of the test.
Additionally, this method can only evaluate the average degree of concrete surface peeling, but the in fact, stripping of concrete surface
The degree that falls is different, peels off serious place and can be easier to be corroded under equivalent assay conditions and peel off more serious.
The method can not comprehensively and truly evaluate the peeling conditions of each point of concrete surface, to the follow-up reality determining concrete after deterioration
Border protective layer thickness and deterioration weak spot, and calculating chloride permeability depth is not provided that accurate data further, actual
Application value is had a greatly reduced quality.And the equipment realizing this evaluation method is one side freezing-thawing test case, this equipment volume is big, be not easy to remove
Fortune, cost are high, and during use, experimental condition is required with harsh, test period length, complex operation.
Content of the invention
For technological deficiency present in prior art, the one kind that provides of the present invention being capable of exact evaluation concrete surface
The method of peeling degree, comprises the following steps:
(1) test specimen test is faced up, be placed horizontally on desktop or ground；
(2) choose a line of test specimen test surfaces, mark several Along ents respectively, with these Along ents as intersection point,
Make some vertical lines of this edge, measure these vertical lines corresponding test surfaces surface profile line length l；Use concrete surface
Peel off surface profile line length l that degree measuring instrument measures described vertical line, its step is to make the downward probe of described measuring instrument
It is fully contacted with test specimen test surfaces；Slowly move described probe, so that Along ent from test specimen for the probe is moved to along this vertical line
Till the opposite side on Along ent place side；Take out the drawing in the data board being connected with probe, that is, obtain the corresponding test of this vertical line
Face surface profile line；Repeat the surface profile line of the other bar vertical line of this step measurement, finally measure each vertical line corresponding surface wheel
Profile length l；
(3) length difference of test surfaces surface profile line length l before calculating each point surface profile line length l and do not peel off
ra, ra=l-l, using length difference raNumerical value quantitative assessment test specimen test surfaces peeling degree, raNumerical value is higher, peels off degree
More serious.
In said method, described concrete surface peels off degree measuring instrument and includes the uncovered cuboid vehicle frame in lower end, has a t
Type frame is located on the Vierendeel girder on vehicle frame top and one group of opposite side perpendicular to Vierendeel girder, and the lower end of t type frame is stretched in vehicle frame and led to
Cross rotating shaft and be connected with probe holder and connecting rod, described probe is installed on the other end of probe holder straight down, described data board is connected to
The connecting rod other end.
Described probe holder is by the crossbeam all vertical with each side of t type frame and montant group with beam vertical and straight down
Become, described probe is located at the lower end of montant.
In said method, described concrete surface is peeled off the test surfaces surface profile line of degree measuring instrument gained, amplify
Several times print, then line taking rope allow cotton rope to overlap with described surface profile line, after just can measuring amplification several times
Surface profile line length, then length l just obtaining original surface outline line divided by multiplication factor.
Described crossbeam is provided with balancing weight.
The weight of described balancing weight is less than 10kg.
Described vehicle frame lower end is provided with wheel.
Described Vierendeel girder upper surface is provided with the sliding tray that the roller being set with described t type frame lower surface is matched.
Described connecting rod is provided with recording pen near one end of data board, and described data board is provided with paper, and described recording pen is
Pencil, ball pen, pen.
The method operating procedure that the evaluation concrete surface that the present invention provides peels off degree is simple, can quickly measure tested
The roughness of sample, for existing method, measurement cost is low, and measuring speed is fast, and test result is easy to observe and reliable
Property high.This method peels off the machine driving of each part between degree measuring instrument by concrete surface, directly reflects test specimen test surfaces
Roughness, reduce in the middle of measurement error, save drying weighing procedures, reduce test error, also accelerate test result
Draw speed.The certainty of measurement of the inventive method can reach 0.01mm, can be subsequent measurements concrete surface roughness value,
Determine the real protection thickness degree of concrete and deterioration weak spot after deteriorating, and for calculating chloride permeability depth further
Accurate data is provided, can also be failure mechanism under multifactor corrosion synergy for the evaluation concrete and endurance quality offer
Reference frame.
Brief description
Fig. 1 show the structural front view that concrete surface peels off degree measuring instrument；
Fig. 2 show the structural side view that concrete surface peels off degree measuring instrument；
Fig. 3 show the structure top view that concrete surface peels off degree measuring instrument；
Fig. 4 show the length difference r that the inventive method recordsaGraph of a relation with scaling amount.
Specific embodiment
The method evaluating concrete surface peeling degree of the present invention is to make use of concrete surface to peel off degree measuring instrument
Machine driving between each part, is passed through along the concrete surface that peeling occurs by probe, and the profile on its surface is passed through
Reflect on data board with the rotating shaft that is connected of probe and connecting rod etc., then the length by measurement surface profile and with peeling front surface
Profile is compared and can get the quantitative analysis results that concrete surface peels off degree.
Below in conjunction with the drawings and specific embodiments, further illustrate present disclosure, and the present invention is made further
Illustrate, but these embodiments have absolutely not any restriction to the present invention.Those skilled in the art are under the enlightenment of this specification to this
Any variation made in inventive embodiments all will belong in the range of claims of the present invention.
The concrete surface that the present invention mentions peels off degree measuring instrument and includes a vehicle frame 1, and it is in rectangular that this vehicle frame 1 is one
The uncovered frame body in the lower end of body or square, frame body is by being rectangle or foursquare Vierendeel girder 2 and support 3 are constituted.
Vierendeel girder 2 is joined end to end successively by 4 metallic rod and constitutes, and, below four angles of Vierendeel girder 2, this support 3 is perpendicular to frame for support 3
Set a roof beam in place the plane at 2 places.The lower end of support 3 is provided with wheel 4.Vehicle frame 1 center is set a roof beam in place between 2 and support 3 and is constituted Vierendeel girder 2
Metallic rod between can be to be fixedly connected or detachable connection, the material of vehicle frame 1 is not limited to metal, also may be used
With from timber, synthetic material, Inorganic Non-metallic Materials, composite etc..
Place a moveable t type frame 5 above the parallel metallic rod of Vierendeel girder 2 one of which, and organize metallic rod at this
Upper surface has the sliding tray matching with the roller of t type frame 5 lower surface, and the t word horizontal edge of t type frame 5 is perpendicular to its gold of placement
Belong to bar and keep this plumbness to slide along this metallic rod, the t word vertical edge of t type frame 5 then puts in vehicle frame 1.The t word of t type frame 5
The glide direction of vertical edge lower end edge t type frame is provided with a probe holder 6, and probe holder 6 includes one perpendicular to the t word vertical edge of t type frame 5
Crossbeam 61, and one perpendicular to this crossbeam 61, parallel to support 3 and the montant 62 that extends downwardly, makes probe holder 6 be in one along suitable
Clockwise have rotated 90 ° of l type.One balancing weight 7 is fixed with the crossbeam 61 of probe holder 6, the lower end of montant 62 is provided with use
In contact test specimen test surfaces probe 8, balancing weight 7 ensure that probe 8 during moving along test specimen test surfaces all the time with
Test specimen test surfaces contact, and the weight of balancing weight can adjust in the range of less than 10kg with being actually needed.
The t word vertical edge lower end of t type frame 5 is connected with a connecting rod 9, and the other end of connecting rod 9 is connected with data board 10.Connecting rod 9 and probe
The crossbeam 61 of frame 6 is connected with the t word vertical edge lower end of t type frame 5 by same rotating shaft 11, then by probe 8 along test specimen test surfaces
Movement locus pass through probe holder 6, rotating shaft 11 and connecting rod 9 are reflected on the drawing of data board 10, probe 8 is along test specimen test surfaces
Movement locus be peel off after test specimen test surfaces surface profile, then by its with peel off before surface profile make comparisons, just
The peeling degree of test specimen test surfaces can be obtained.
During use, (concrete cube test specimen is according to mixed for the concrete cube test specimen that one piece of bottom surface is 10cm × 10cm
Solidifying earth forming step put into standard test mode concrete cube test specimen) measurement face up, lie in the glove of level
On platform or ground；Choose an initial line as measurement for a line of test specimen measuring surface, go out 5 Along ents by length mark, with
This 5 Along ents are intersection point, make 5 vertical lines of this initial line；Concrete surface is peeled off degree measuring instrument and is put in test specimen
Top, allows test specimen be placed in this concrete surface and peels off the crossbeam 61 and wherein keeping probe holder 6 in the vehicle frame of degree measuring instrument
Bar vertical line overlaps, and allows probe 8 to be fully contacted with test specimen test surfaces；The Vierendeel girder 2 slowly moving t type frame 5 along vehicle frame 1 slides,
So that till probe 8 opposite side of initial line from the Along ent on test specimen moves to along this vertical line；Take out the drawing in data board,
Obtain the surface profile line of this vertical line corresponding test specimen test surfaces.Concrete surface is peeled off the surface of degree measuring instrument gained
Outline line, is amplified 5 times and prints, then line taking rope allow cotton rope to be overlapped with surface profile line, after just can measuring amplification
The length of surface profile line, then length l being just amplified front surface outline line divided by 5.Gauging surface profile line length l with not
The length difference r of surface of test piece profile line length l before peelinga, i.e. ra=l-l.Calculate this 5 according to identical operation respectively
The surface profile line of vertical line corresponding test specimen test surfaces with do not peel off before surface of test piece outline line length difference ra, 5 will be obtained
Individual raAverage.
If wanting to make measurement result more accurate, the quantity of Along ent being increased, having test specimen to survey thus obtaining more records
The drawing of examination face surface profile line, obtains more surface profile line length difference ra.
Measure normal concrete, flyash concrete and agstone respectively with concrete surface peeling degree measuring instrument to mix
Solidifying soil freezes the length difference r of 14 times, 28 times and 42 times through salta, and pass through International Structure material testing laboratory and expert federation rilem
The cif method (rilem tc176) recommended measures, is calculated concrete corresponding peeling value, and measurement result is shown in Table 1.
The length difference r of surface profile line after supersalt jelly for the various concrete of table 1aWith corresponding scaling amount
With raIt is worth for abscissa, scaling amount is ordinate, three kinds of concrete is frozen the r of 14 times, 28 times and 42 times through saltaValue
Reflect in the diagram with the relation of scaling amount.R as can be seen from Figure 4aFine with the linear dependence of scaling amount, with the present invention
The r that calculates of methodaValue, is in one-to-one relationship with the peeling value measured by rilem tc176, and can get linear side
Journey y=556.2x+138.8, degree of fitting r is 0.979, and r is describedaVery good with the linear dependence of scaling amount.Acceptable from Fig. 4
Find out, the r being determined with the method for the present inventionaValue is not limited to the species of concrete that is to say, that the r of any kind of concretea
Value and peeling magnitude relation are suitable for this linear equation, therefore, it can peel off degree measuring instrument and Ben Fa by concrete surface
The r to concrete for the bright method sceneaValue measures, then substitutes in above-mentioned linear equation, has just obtained detected concrete
Peeling degree (i.e. scaling amount), eliminate conventional method need to process through filtering, drying, weigh, save human and material resources, wealth
Power, measuring speed is fast, more efficiently.
It is therefore seen that, method of the present invention operating procedure is simple, easily operates, can quickly measure the coarse of sample
Degree, for existing method, measurement cost is low, and measuring speed is fast, and test result is easy to observe and reliability is high.This method
Peel off the machine driving of each part between degree measuring instrument by concrete surface, directly reflect the roughness of test specimen test surfaces, subtract
The error of measurement in the middle of few, saves drying weighing procedures, reduces test error, also accelerate test result draws speed.Mixed
Degree measuring instrument structure is peeled off simply in solidifying soil surface, can now be assembled with existing, and for one side freezing-thawing test case, body
Long-pending light and handy, it is easy to carry.The certainty of measurement of the inventive method can reach 0.01mm, can be thick for subsequent measurements concrete surface
Rugosity value, determines the real protection thickness degree of concrete and deterioration weak spot after deteriorating, and for calculating chlorion further
Penetration depth provides accurate data, failure mechanism and durable that can also be for evaluation concrete under multifactor corrosion synergy
Performance provides reference frame.
The above is only the preferred embodiment of the present invention it is noted that common skill for the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also should be regarded as protection scope of the present invention.
Claims (14)
1. a kind of concrete surface of evaluating peels off the method for degree it is characterised in that comprising the following steps:
(1) test specimen test is faced up, be placed horizontally on desktop or ground；
(2) choose a line of test specimen test surfaces, mark several Along ents respectively, with these Along ents as intersection point, make
Some vertical lines of this edge, measure these vertical lines corresponding test surfaces surface profile line length l；Peeled off with concrete surface
Degree measuring instrument measures surface profile line length l of described vertical line, and its step is to make downward probe and the examination of described measuring instrument
Part test surfaces are fully contacted；Slowly move described probe, make Along ent from test specimen for the probe move to decile along this vertical line
Till the opposite side on point place side；Take out the drawing in the data board being connected with probe, that is, obtain this vertical line corresponding test surfaces table
Facial contour line；Repeat the surface profile line of the other bar vertical line of this step measurement, finally measure each vertical line corresponding surface profile line
Length l；
(3) the length difference r of test surfaces surface profile line length l before calculating each point surface profile line length l and do not peel offa, ra=
L-l, using length difference raNumerical value quantitative assessment test specimen test surfaces peeling degree, raNumerical value is higher, peels off degree more serious.
2. according to claim 1 method it is characterised in that described concrete surface peel off degree measuring instrument include lower end open
Mouthful cuboid vehicle frame, have a t type frame to be located on the Vierendeel girder on vehicle frame top and one group of opposite side perpendicular to Vierendeel girder, t type frame
Lower end stretch in vehicle frame and probe holder and connecting rod be connected with by rotating shaft, described probe is arranged on the another of probe holder straight down
End, described data board is connected to the connecting rod other end.
3. according to claim 2 method it is characterised in that described probe holder is by the crossbeam all vertical with each side of t type frame
And montant composition with beam vertical and straight down, described probe is located at the lower end of montant.
4. according to claim 3 method it is characterised in that described concrete surface peel off degree measuring instrument gained survey
Examination face surface profile line, amplifies several times and prints, and then line taking rope allow cotton rope to be overlapped with described surface profile line just may be used
Measure the length of the surface profile line after amplifying several times, then length l just obtaining original surface outline line divided by multiplication factor.
5. according to claim 3 or 4 methods describeds it is characterised in that described crossbeam is provided with balancing weight.
6. according to claim 5 method it is characterised in that the weight of described balancing weight is less than 10kg.
7. according to the arbitrary methods described of claim 2-4 it is characterised in that described vehicle frame lower end is provided with wheel.
8. according to claim 5 method it is characterised in that described vehicle frame lower end is provided with wheel.
9. according to the arbitrary methods described of claim 2-4 it is characterised in that described Vierendeel girder upper surface is provided with and described t type frame
The sliding tray that the roller that lower surface sets matches.
10. according to claim 7 method it is characterised in that described Vierendeel girder upper surface is provided with and described t type frame lower surface
If the sliding tray that matches of roller.
11. according to claim 8 method it is characterised in that described Vierendeel girder upper surface is provided with and described t type frame lower surface
If the sliding tray that matches of roller.
12. according to the arbitrary methods described of claim 2-4 it is characterised in that described connecting rod is provided with note near one end of data board
Record pen, described data board is provided with paper, and described recording pen is pencil, ball pen, pen.
13. according to claim 10 method it is characterised in that described connecting rod is provided with recording pen near one end of data board,
Described data board is provided with paper, and described recording pen is pencil, ball pen, pen.
14. according to claim 11 methods described it is characterised in that described connecting rod is provided with recording pen near one end of data board,
Described data board is provided with paper, and described recording pen is pencil, ball pen, pen.
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| CN102853799A (en) * | 2012-08-27 | 2013-01-02 | 长沙学院 | Detection device of abraded shape and mass loss and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5565987A (en) * | 1995-03-23 | 1996-10-15 | Anvik Corporation | Fabry-Perot probe profilometer having feedback loop to maintain resonance |
| US5898106A (en) * | 1997-09-25 | 1999-04-27 | Digital Instruments, Inc. | Method and apparatus for obtaining improved vertical metrology measurements |
| CN101451831A (en) * | 2008-12-24 | 2009-06-10 | 昊华南方(桂林)橡胶有限责任公司 | Simple tyre contour outline measuring set |
| CN101672625A (en) * | 2009-10-13 | 2010-03-17 | 西安交通大学 | Measurement method of thickness of subsurface damaged layer of bucky optical material |
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