CN104007183B - A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect - Google Patents
A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect Download PDFInfo
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- CN104007183B CN104007183B CN201410240702.7A CN201410240702A CN104007183B CN 104007183 B CN104007183 B CN 104007183B CN 201410240702 A CN201410240702 A CN 201410240702A CN 104007183 B CN104007183 B CN 104007183B
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- Prior art keywords
- couplant
- gypsum
- surface roughness
- vinyl
- transverse wave
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Abstract
The invention discloses a kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect.Couplant of the present invention is with materials cheap and easy to get such as gypsum, the plaster of paris, polyvinyl alcohol, white glue with vinyl, calcium oxide and magnesium chlorides, make a kind of powder material by certain operation and be stored in sealing bag stand-by, mix with water during use, it is applied in testee surface after being sufficiently stirred for and ultrasonic probe is installed, the most just can carry out ultrasonic test.This couplant is in liquid-plastic state at ultrasonic test pretreatment stage, can be sufficient filling with the space between probe and testee end face, eliminates the surface roughness impact on ultrasonic test.It is in hard plastic state when ultrasonic test, there is suitable adhesion strength ultrasonic probe is sticked to one with testee, the most vertical the most available transverse wave testing effect.The present invention calculates the reaction mass of each material by chemical equation simultaneously, makes couplant close to neutral, reduces the corrosion to measured object Yu probe.
Description
Technical field
The present invention relates to the ultrasonic tests such as rock, concrete, the detection of steel construction and flaw detection
Field, particularly to a kind of coupling eliminating surface roughness impact and improving vertical transverse wave testing effect
Mixture.
Background technology
Ultrasonic listening technology, as one of the main exploration method of geophysical exploration, extensively should
Differentiate for rock Rock Engineering Properties, integrality judges, coalfield and oil field prospecting etc. etc. neck
Territory.Ultrasonic listening technology simultaneously is also widely used in the industries, such as concrete such as work China Democratic National Construction Association,
The Non-Destructive Testing of the materials such as steel construction.But ultrasonic wave can not penetrate ultrasonic probe and measured object
Air between body, so must couple protection through row between transducer with testee.At present,
The use of couplant lacks specification, and multiple different couplant is used in the middle of production, scientific research；
Owing to the coupling effect of couplant is different, reduce the reliability of test result, the most unfavorable
Test result comparative analysis under the conditions of same material difference couplant.
At present, couplant great majority are liquid, such as machine oil, vaseline；Solid-state less,
Such as aluminium foil.Although the couplant of these liquid can pass through compressional wave, but can not pass through shear wave；
And coupling tightness degree that the couplant of solid-state is under low-stress is very poor.In addition, sound
Ripple test is higher to testee end face flatness requirement, it is impossible to be widely used in different end face thick
The test of rugosity.Along with the intensification of current ultrasonic wave theory and practice application, ripple one is visited in length and breadth
Head increasingly popular, to can indulge transverse wave testing and be applicable to the coupling of different surface roughness simultaneously
Agent is the most urgent.
Summary of the invention
For the test error overcoming prior art to bring because of the selection of couplant, and also to simple
Change experiment and reduce requirement of experiment, it is an object of the invention to provide a kind of elimination surface roughness
Impact and improve the couplant of vertical transverse wave testing effect, can test simultaneously in length and breadth ripple, be applicable to not
With roughness end face, nontoxic ultrasonic test.
For reaching above-mentioned purpose, the technical scheme is that
A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect, bag
Include:
Consolidating agent: plaster of paris CaSO4·0.5H2O,
Consolidation strength conditioning agent: gypsum CaSO4·2H2O,
Lubricant and early strength agent: white glue with vinyl, polyvinyl alcohol,
The mixing powder that it be also possible to use magnesium chloride Mg Cl and calcium oxide CaO in severe cold region does
Heat additive.
Described couplant makes and divides three steps: the first step, with gypsum: poly-vinyl alcohol solution:
White glue with vinyl: the mass ratio of boiling water=50:15:5:15 is by gypsum, polyvinyl alcohol colloidal sol and Virgin's milk
Glue stirs in boiling water, then dries 1 between temperature 140 °～170 ° in baking oven
Hour, it is heat-treated and forms plaster of paris hybrid solid；Second step, interpolation consolidation strength conditioning agent:
Gypsum, by plaster of paris mixture: the mass ratio of gypsum=10:1 uniformly mixes, in obtaining
Speed couplant；3rd step, under particular demands, adds heating agent, obtains cold-resistant couplant.
Further, described couplant is chosen, by couplant: magnesium chloride: calcium oxide=
The mass ratio of 150:20:13 uniformly mixes, and obtains cold-resistant couplant.
Further, the most ground 0.075mm sieve, gained couplant before all solids mixing
It is sealed in sealing bag stand-by, mixes with warm water 0.8:1～1:1 in mass ratio in use i.e.
Can use.
There is before it is an advantage of the current invention that the semi-consolidated time preferable plasticity, can closely knit fill out
Fill the space between coupling surface, smooth end face coarse.Apply this couplant can reduce sample end
The process in face, thus reduce sample preparation cost, it is also applied for field in-situ test roughened end surface situation.
After ultrasonic probe is installed, couplant is gradually become solid-state from soft plastic state, has appropriateness
Transducer is sticked to one by adhesion strength with testee, can save spy during special acoustical testing
Head fixing device.After arriving consolidation time, couplant is hard plastic state, can be preferably by vertical
Shear wave.The present invention adds consolidation strength conditioning agent according to actual conditions, prevents probe consolidation sacrifices consisting of an ox, a sheep and a pig
Gu, it is not easy to the generation of the situation that measured object separates.The present invention is accompanied by heating pulvis, can answer
Pay the impact on experiment of the bad weathers such as severe cold.
Accompanying drawing explanation
Fig. 1 is the sonic test schematic diagram of the present invention；
Fig. 2 is loose sand end face contrast before and after couplant of the present invention processes；
Fig. 3 standard aluminum sample (Φ 50 × 100) vaseline contrasts with couplant coupling effect of the present invention；
Fig. 4 standard fine sand rock sample (Φ 50 × 100) vaseline and couplant coupling measurement of the present invention
Contrast on effect；
Fig. 5 standard granite sandstone (Φ 50 × 100) vaseline couples survey with couplant of the present invention
Examination Contrast on effect.
Detailed description of the invention
Below in conjunction with the accompanying drawings and technical solution of the present invention is done further in detail by detailed description of the invention
Describe:
A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect, bag
Include:
Consolidating agent: plaster of paris CaSO4·0.5H2O,
Consolidation strength conditioning agent: gypsum CaSO4·2H2O,
Lubricant and early strength agent: white glue with vinyl, polyvinyl alcohol,
The mixing powder that it be also possible to use magnesium chloride Mg Cl and calcium oxide CaO in severe cold region does
Heat additive.
Described couplant makes and divides three steps: the first step, with gypsum: poly-vinyl alcohol solution:
White glue with vinyl: the mass ratio of boiling water=50:15:5:15 is by gypsum, polyvinyl alcohol colloidal sol and Virgin's milk
Glue stirs in boiling water, then dries 1 between temperature 140 °～170 ° in baking oven
Hour, it is heat-treated and forms plaster of paris hybrid solid；Second step, interpolation consolidation strength conditioning agent:
Gypsum, by plaster of paris mixture: the mass ratio of gypsum=10:1 uniformly mixes, in obtaining
Speed couplant；3rd step, under particular demands, adds heating agent, obtains cold-resistant couplant.
Further, described couplant is chosen, by couplant: magnesium chloride: calcium oxide=
The mass ratio of 150:20:13 uniformly mixes, and obtains cold-resistant couplant.
Further, the most ground 0.075mm sieve, gained couplant before all solids mixing
It is sealed in sealing bag stand-by, mixes with warm water 0.8:1～1:1 in mass ratio in use i.e.
Can use.
Embodiment 1, a kind of coupling eliminating surface roughness impact and improving vertical transverse wave testing effect
Mixture, including:
Consolidating agent: plaster of paris CaSO4·0.5H2O,
Consolidation strength conditioning agent: gypsum CaSO4·2H2O,
Lubricant and early strength agent: white glue with vinyl, polyvinyl alcohol,
The mixing powder that it be also possible to use magnesium chloride Mg Cl and calcium oxide CaO in severe cold region does
Heat additive.
Described couplant makes and comprises the steps:
(1) boiling water, the polyvinyl alcohol sol of 8% and white glue with vinyl are mixed in the ratio of 20:14:1
Merge and be sufficiently stirred for forming high temperature dilution poly-vinyl alcohol solution.
(2) gypsum powder and the synthesizing high temperature sol 3:2 in mass ratio of 0.075mm sieve will be crossed
Ratio mixing, form the higher starchiness mix reagent of denseness.
(3) putting into after being sufficiently stirred for by above-mentioned mix reagent in baking oven, oven temperature controls
Between 140 °～170 °, it is dehydrated through the heat treatment of 1 hour, makes gypsum (CaSO4·2H2O)
Mix reagent age gypsum (CaSO4·0.5H2O) hybrid solid.The above-mentioned plaster of paris is mixed
Solid ground 0.075mm sieve and formed plaster of paris mixed-powder, then press plaster of paris mixture:
Gypsum=10:1 uniformly mixes, and forms couplant, and is stored in sealing bag stand-by.
(4), when using, water is mixed with couplant 0.8:1～1:1 in mass ratio and is sufficiently stirred for
Form starchiness ultrasonic wave-coupled agent；Rapidly the couplant prepared is applied in testee end face
Then transducer is installed and applies the slightly pressure several seconds, such as Fig. 1 after consolidation exceedes consolidation time
Shown in, carry out ultrasonic measurement.If under severe cold condition, for ensureing test effect, can add
The magnesium chloride of the 20:13 adding 5%: calcium oxide mixed-powder improves water temperature.This couplant performance is joined
Number is shown in Table 1.
Table 1 couplant performance parameter
Note: probe set time and consolidation time start timing after installing for probe.
The technical scheme used of the present invention and mentality of designing be: water met by this consolidation couplant
Rear formation is thick, interacts with Van der Waals force between particle.And due to polyvinyl alcohol and
White glue has lubrication, has bigger stream plasticity at this stage couplant.The present invention is at this
The time of the end accounting for leading role power between definitions particles with Van der Waals force is the semi-consolidated time.
Before the semi-consolidated time, couplant stream plasticity is good, can carry out testee end before sonic test
The installation that the couplant in face is smeared with ultrasonic probe is fixed.According to test to different semi-consolidated time
Between demand, present invention potassium sulfate and sodium chloride mixing powder shorten the semi-consolidated time and six
Phosphorus meta-acid sodium extends the semi-consolidated time.After ultrasonic probe coupling is installed and is fixed, gypsum
Water suction, contact with each other between aquation nucleus raised growth, crystal connection, forms crystalline texture net
In solid-state.Along with the intensification of the state of cure of couplant, ultrasonic wave-coupled effect also improves, directly
Reaching to a certain degree to solidification, coupling effect is not further added by, and the present invention defines this time for consolidation
Time.After consolidation time, so that it may carry out ultrasonic test.For preventing consolidation strength too big,
It is unfavorable for that probe separates with testee, uses gesso to make consolidation strength conditioning agent.For
Can be suitably used for the adverse circumstances such as field severe cold, the present invention heats with magnesium chloride and calcium oxide
Agent.
There is before it is an advantage of the current invention that the semi-consolidated time preferable plasticity, can closely knit fill out
Fill the space between coupling surface, smooth end face coarse.Apply this couplant can reduce sample end
The process in face, thus reduce sample preparation cost, it is also applied for field in-situ test roughened end surface situation,
Comparing result is shown in Fig. 2.After ultrasonic probe is installed, couplant is gradually become from soft plastic state
Solid-state, transducer is sticked to one by the adhesion strength with appropriateness with testee, can save spy
Probe fixing device during different acoustical testing.After arriving consolidation time, couplant is hard plastic state,
Can be preferably by ripple in length and breadth, comparing result is shown in Fig. 3, Fig. 4, Fig. 5.The present invention is according to reality
Border situation adds consolidation strength conditioning agent, prevents probe consolidation too strong, is not easy to measured object and divides
From the generation of situation.The present invention is accompanied by heating pulvis, can deal with the bad weathers pair such as severe cold
The impact of experiment.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also
It is not limited to this, any change expected without creative work or replacement, all should contain
Within protection scope of the present invention.Therefore, protection scope of the present invention should be with claims
The protection domain limited is as the criterion.
Claims (3)
1. eliminating surface roughness impact and improve a couplant for vertical transverse wave testing effect, its feature exists
In, including:
Consolidating agent: plaster of paris CaSO4·0.5H2O,
Consolidation strength conditioning agent: gypsum CaSO4·2H2O,
Lubricant and early strength agent: white glue with vinyl, polyvinyl alcohol,
Magnesium chloride Mg Cl is also used in severe cold region2Additive is heated with the mixing powder of calcium oxide CaO；
Described couplant makes and divides three steps: the first step, with gypsum: poly-vinyl alcohol solution: white glue with vinyl: boiling water
Gypsum, polyvinyl alcohol colloidal sol and white glue with vinyl are sufficiently stirred for all in boiling water by the mass ratio of=50:15:5:15
Even, then dry 1 hour in baking oven between temperature 140 °～170 °, be heat-treated and form plaster of paris mixing
Solid；Second step, interpolation consolidation strength conditioning agent: gypsum, by plaster of paris mixture: gypsum=10:1
Mass ratio uniformly mix, obtain middling speed couplant；3rd step, under particular demands, adds heating agent,
Obtain cold-resistant couplant.
The most according to claim 1, couplant, it is characterised in that choose middling speed couplant, by middling speed coupling
Mixture: magnesium chloride: the mass ratio of calcium oxide=150:20:13 uniformly mixes, obtains cold-resistant couplant.
3. according to couplant described in right 1 or 2, it is characterised in that the most ground before all solids mixing
0.075mm sieves, and gained couplant is sealed in sealing bag stand-by, in use with warm water in mass ratio
0.8:1～1:1 mixing can use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240702.7A CN104007183B (en) | 2014-05-30 | 2014-05-30 | A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240702.7A CN104007183B (en) | 2014-05-30 | 2014-05-30 | A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104007183A CN104007183A (en) | 2014-08-27 |
| CN104007183B true CN104007183B (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410240702.7A Expired - Fee Related CN104007183B (en) | 2014-05-30 | 2014-05-30 | A kind of couplant eliminating surface roughness impact and improving vertical transverse wave testing effect |
Country Status (1)
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| CN (1) | CN104007183B (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060280899A1 (en) * | 2005-06-14 | 2006-12-14 | United States Gypsum Company | Method of making a gypsum slurry with modifiers and dispersants |
| CN1924571B (en) * | 2006-09-21 | 2010-06-02 | 浙江建设职业技术学院 | Ultrasonic determination method of light-weight soil wave speed characteristic value |
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2014
- 2014-05-30 CN CN201410240702.7A patent/CN104007183B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN104007183A (en) | 2014-08-27 |
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Granted publication date: 20160824 Termination date: 20190530 |