CN100485363C - Tensile bonding strength test method - Google Patents
Tensile bonding strength test method Download PDFInfo
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- CN100485363C CN100485363C CN 200610044692 CN200610044692A CN100485363C CN 100485363 C CN100485363 C CN 100485363C CN 200610044692 CN200610044692 CN 200610044692 CN 200610044692 A CN200610044692 A CN 200610044692A CN 100485363 C CN100485363 C CN 100485363C
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- test block
- test
- steel
- adhesive
- tackifier
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- 238000010998 test method Methods 0.000 title abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 238000012423 maintenance Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000008261 styrofoam Substances 0.000 claims description 25
- 229920006328 Styrofoam Polymers 0.000 claims description 24
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 10
- 238000007405 data analysis Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 238000009413 insulation Methods 0.000 abstract description 8
- 239000004793 Polystyrene Substances 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 229920002223 polystyrene Polymers 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000002791 soaking Methods 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 description 7
- 229920000647 polyepoxide Polymers 0.000 description 7
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a tensile bonding strength test method of an adhesive and a polystyrene board in an external thermal insulation system of an external wall, in particular to a uniform stretching test method of a sleeve frame, wherein the polystyrene board to be measured is cut into a square board as a test block, the adhesive is coated on one side surface of the test block and dried, the adhesive is coated on the other opposite side surface of the test block, and a curing test block is formed after curing for 10-20 days; soaking the maintenance test block in water for 40-60 hours, taking out and airing for 2 hours; and (3) respectively uniformly bonding and pressing the two sides of the maintenance test block coated with the adhesive with the two smooth steel plates, and testing the bonding strength of the maintenance test block by oppositely applying tension along the outer sides of the two steel plates, wherein the tested polystyrene board and the adhesive are damaged as test base points. The invention adopts a combined structure type to carry out microcomputer control test measurement on the adhesive and the polystyrene board material, and the method has the advantages of reliable principle, uniform loading (force), high test accuracy, and accurate recorded data and analysis result.
Description
Technical field:
The present invention relates to the tensile bond strength testing method of tackifier and styrofoam in a kind of external wall heat insulation system, particularly a kind of method that adopts the even pulling method of cover frame the tensile bond strength of tackifier and styrofoam to be carried out experimental measurement.
Background technology:
In recent years, the External Thermal Insulation Technology for External development is rapid, and especially external wall heat insulation system has obtained promoting widely.In external wall heat insulation system, the tensile bond strength of tackifier and styrofoam is an important indicator weighing certain heat insulation system quality.The existing test method of measuring this intensity mainly contains two kinds: first kind is direct pulling method, described in People's Republic of China's industry standard " external wall outer insulation engineering rules " JGJ144-2004:A.8 bar tensile bond strength testing method: the plate that styrofoam is cut into 100mm * 100mm * 50mm, coating adhesive on surface of styrofoam, thickness are (3 ± 1) mm.Through after the maintenance, the two sides bonds with suitable tackifier (as epoxy resin) and the steel sole plate that is of a size of 100mm * 100mm; Stretched until destroying the tensile bond strength of measuring tackifier and styrofoam.Second kind is cover frame pulling method, described in People's Republic of China's building industry industry standard " expansion polyphenyl plate thinly plastered external insulation system of outer wall " JG149-2003:6.3 bar tensile bond strength testing method, styrofoam is cut into the plate of 70mm * 70mm, tackifier thickness is 3mm, the sand-cement slurry test block is of a size of 40mm * 40mm, and is stretched until destroying the tensile bond strength of measuring tackifier and styrofoam.End is got up, and there is following defective in these two kinds of methods: at first, method one is because steel plate adds size out of true or surface irregularity during stick steel plate in man-hour, and test block upper and lower surface pulling force application point makes sample generation diagonal tension failure not point-blank; Secondly, the test block in the method two is non-homogeneous tension, and bond area is big more, and influence heterogeneous is obvious more; In addition, during the reinforcing bar of these two kinds of methods on clamp top board and base plate (or cover frame), all can produce torque, test block is destroyed in advance test block.Above defective all will cause the limit stretching resistance of test block less than normal, and destroy in advance.Therefore, existing many colleague experts improve sex exploration and research to current test method, but Shang Weijian has outstanding progress.
Summary of the invention:
The objective of the invention is to overcome the shortcoming that exists in the art methods, seek to design the even pulling method of a kind of employing cover frame and measure tackifier and styrofoam tensile bond strength testing method, realize accurately measuring the tensile bond strength of tackifier and styrofoam.
Off-centre, torque and the tension of the present invention when eliminating the sample tension is inhomogeneous, has done following 2 improvement, and the one, catch on the steel top board of band annulus, off-centre when eliminating tension and torque with the rod iron of band crotch with this; The 2nd, the steel sole plate that bonds below test block avoids inhomogeneous stressed, and then is inserted in steel cover frame, off-centre in the time of so just can adjusting the test block tension and torque, and can make the even tension of test block.
The present invention earlier with the styrofoam side of the cutting into body plate of usefulness to be measured as test block, smear tackifier in another opposite flank again after smearing tackifier and dry in a side of test block, maintenance under certain condition formed curing test block after 10～20 days; Curing test block was soaked in water 40～60 hours, dry in the air after the taking-up and put 2 hours; Select for use bi-component epoxide-resin as cementing agent, the side that two of curing test block have been smeared tackifier respectively with two level and smooth steel plates bondings evenly and compress solid, add its cohesive strength of tensile test in opposite directions along the two steel plates outside, damaged with tested styrofoam and tackifier as the test basic point.
When selecting steel plate for use, the shiny surface size of one block plate is identical with test block as the steel top board, the shiny surface of another block plate greater than the test block size as steel sole plate, on the steel top board, be shaped on the pulling force rod iron so that be connected with external force, the square bar base plate adopts the afterburning form of steel cover frame, be convenient to the even of pulling force, realize measurement accuracy.Use system controlled by computer electronics universal testing machine during measurement, the upper and lower part is clamped the rod iron on steel top board and the steel cover frame respectively, press the draw speed loading of per minute 5mm and keep the steel top board parallel with steel sole plate centering, damaged until test block is stretched, the line data analysis of going forward side by side of pulling force when record is damaged and damaged position is obtained a result.
The present invention adopts combination structure eliminant that tackifier and styrofoam material are carried out micro-processor controlled experimental measurement, and its method principle is reliable, loads (power) evenly, the test accuracy height, and record data and analysis result are accurate.
Description of drawings:
Fig. 1 is the experiment unit construction principle synoptic diagram of method of testing of the present invention, comprises steel cover frame 1, steel sole plate 2, styrofoam 3, tackifier 4, steel top board 5, crotch rod iron 6 and rod iron 7 etc.
Embodiment:
Specify the method and the process of the tensile bond strength between test tackifier 4 and the styrofoam 3 below by embodiment.
1. test condition:
(1) determined styrofoam of external wall heat insulation system and polystyrene board adhesive generally adopt 18kg/m
3～22kg/m
3Styrofoam 3, and adopt the polymer cement rubber cement as tackifier 4.
(2) bi-component epoxide-resin, two kinds of set of dispense composition and division in a proportion are epoxy resin (E-44): hardening agent (T-31)=4: 1.
(3) test fixture: the annulus on the steel top board 5 must firmly be welded on the center of steel top board, and the rod iron 7 under the steel cover frame 1 is welded on the center of cover frame.
2. test block is made:
(1) with heating wire or hand papercutter styrofoam material to be measured is cut into the plate that is of a size of 40mm * 40mm * 30mm, permissible variation in dimension is ± 1mm, it is impaired to note avoiding making styrofoam 3 during cutting, smear the tackifier 4 of thick (3 ± 1) mm in styrofoam 3 one sides, floating with blade, treat to smear at another side again after tackifier dries the tackifier of thick (3 ± 1) mm, floating back curing test block under following two kinds of conditions: the one, maintenance is 14 days under 23 ± 2 ℃ and 50 ± 5% standard conditions, 5 test blocks of one group of making; The 2nd, maintenance was soaked 48 hours in the water after 14 days, dried in the air after the taking-up 2 hours, made 5 test blocks for one group.
(2) through after the maintenance, with smooth with steel top board 5 bondings above the test block, the 40mm * 40mm with steel sole plate 2 centers below the test block partly bonds, and guarantees that steel top board 5 is parallel with steel sole plate 2 with bi-component epoxide-resin.After the bonding unnecessary epoxy resin is extruded and wiped off, in order to avoid make the surface of steel plate out-of-flatness.
(3) treat to carry out tension test behind the epoxy resin cure.
3. process of the test
Test block is installed anchor clamps, adjust steel sole plate 2 and the position of overlapping frame 1 during installation, make steel sole plate 2 occupy the center of cover frame 1, rod iron 6 with the band crotch catches on steel top board 5 centers, and the top of system controlled by computer electronics universal testing machine all on a perpendicular line, is clamped the rod iron 6 of band crotch then in the center that makes test block and each anchor clamps, the rod iron 7 of steel cover frame 1 is clamped in the bottom, begin to load, draw speed is 5mm/min during loading, keeps steel top board 5 and steel sole plate 2 centerings and parallel in the drawing process.Test block is stretched to breakage, pulling force and damaged position when record is damaged.Testing machine and computer are online, and image data point is also analyzed load---displacement curve.
4. test result analysis
(1) tensile bond strength of tackifier and styrofoam should calculate by following formula:
In the formula: σ
t---the tensile bond strength of tackifier and styrofoam, unit are Mpa;
N
b---fail in tension load, unit are N;
A---sample bond area is 40 * 40mm
2
Test findings under the two breeding guard strip spares is all with the arithmetic mean value representation of 5 test figures.
(2) test block acceptability criteria: tackifier and the styrofoam tensile bond strength under above two breeding guard strip spares all must not be less than 0.1Mpa, and destroys the position and should be positioned at styrofoam.
Claims (3)
1. a tensile bond strength testing method is characterized in that the rod iron with the band crotch catches on the steel top board of band annulus; The steel sole plate that bonds below test block is inserted in steel cover frame then, keeps the steel top board parallel with steel sole plate centering; The styrofoam side of the cutting into body plate of usefulness to be measured as test block, is smeared tackifier in another opposite flank after smearing tackifier and dry in a side of test block again, and maintenance formed curing test block after 10～20 days; Curing test block was soaked in water 40～60 hours, dry in the air after the taking-up and put 2 hours; The side that two of curing test block have been smeared tackifier respectively with two level and smooth steel plates bondings evenly and compress solid, add pulling force in opposite directions along the two steel plates outside, so that test block is stretched to breakage, the result that data analysis draws the test cohesive strength is carried out at pulling force when record is damaged and damaged position.
2. tensile bond strength testing method according to claim 1 is characterized in that the shiny surface size of steel top board is identical with test block, and the shiny surface size of square bar base plate is greater than test block and adopt the afterburning form of steel cover frame.
3. tensile bond strength testing method according to claim 1 is characterized in that loading by the draw speed of per minute 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610044692 CN100485363C (en) | 2006-06-06 | 2006-06-06 | Tensile bonding strength test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610044692 CN100485363C (en) | 2006-06-06 | 2006-06-06 | Tensile bonding strength test method |
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| Publication Number | Publication Date |
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| CN1865921A CN1865921A (en) | 2006-11-22 |
| CN100485363C true CN100485363C (en) | 2009-05-06 |
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| CN 200610044692 Expired - Fee Related CN100485363C (en) | 2006-06-06 | 2006-06-06 | Tensile bonding strength test method |
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| CN103076280A (en) * | 2012-12-28 | 2013-05-01 | 东方电气集团东方汽轮机有限公司 | Method for detecting bonding strength between steam sealing teeth and steam sealing back panel |
| TWI447376B (en) * | 2011-05-10 | 2014-08-01 | Au Optronics Corp | Method for measuring sealant strength of lcd panel and measuring apparatus thereof |
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2006
- 2006-06-06 CN CN 200610044692 patent/CN100485363C/en not_active Expired - Fee Related
Non-Patent Citations (3)
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| 中华人民共和国建材行业标准 JC/T992-2006 墙体保温用膨胀聚苯乙烯板胶粘剂. 王新民 等，1-10，中华人民共和国国家发展和改革委员会. 2006 中华人民共和国建筑工程行业标准JG149-2003 膨胀聚苯板薄抹灰外墙外保温系统. 中华人民共和国建设部，1-19，中国标准出版社. 2003 |
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| TWI447376B (en) * | 2011-05-10 | 2014-08-01 | Au Optronics Corp | Method for measuring sealant strength of lcd panel and measuring apparatus thereof |
| CN103076280A (en) * | 2012-12-28 | 2013-05-01 | 东方电气集团东方汽轮机有限公司 | Method for detecting bonding strength between steam sealing teeth and steam sealing back panel |
| CN103076280B (en) * | 2012-12-28 | 2015-06-24 | 东方电气集团东方汽轮机有限公司 | Method for detecting bonding strength between steam sealing teeth and steam sealing back panel |
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| CN1865921A (en) | 2006-11-22 |
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