CN113310822A - Airport pavement sealing layer high horizontal force shearing test device and test method - Google Patents
Airport pavement sealing layer high horizontal force shearing test device and test method Download PDFInfo
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- CN113310822A CN113310822A CN202110575186.3A CN202110575186A CN113310822A CN 113310822 A CN113310822 A CN 113310822A CN 202110575186 A CN202110575186 A CN 202110575186A CN 113310822 A CN113310822 A CN 113310822A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a large horizontal force shear test device for an airport pavement sealing layer, which comprises a UTM (Universal test machine) and is characterized in that: the epoxy asphalt mortar is characterized by also comprising a cement concrete plate, an epoxy asphalt sand fog seal layer, an epoxy adhesive and a metal plate. The epoxy adhesive bonds and fixes the metal plate, the cement concrete plate and the epoxy asphalt sand fog seal layer into a three-layer structure test piece; the three-layer structure test piece is fastened and fixed by a left chuck and a right chuck on a fixing frame of the UTM machine, and vertical stress is applied by a load chuck of the UTM machine.
Description
Technical Field
The invention relates to a large horizontal force shear test method for an airport pavement sealing layer, and belongs to the technical field of airport pavement sealing layer performance test.
Background
At present, no instrument specially aiming at the sealing layer shearing force of the airport pavement surface is available, and the instrument mainly aims at the shearing instrument of the bonding material between the highway pavement layers and mainly comprises three types of direct shearing type, torsion type and oblique shearing type test instruments. The direct shear type experiment instrument adopts one end of a fixed test piece and applies a force parallel to the plane of the bonding layer to the other end to realize the shear strength test of the bonding layer; the torsion type experiment instrument completes the shear strength test by fixing one end of the test piece and applying torque to the other end; the oblique shear type tester is different from the direct shear type tester in that an oblique bonding surface is arranged, and the shear strength test of the bonding layer is completed by applying the axial force of the bonding layer. The above described shearing apparatus has the following disadvantages:
the direct shear type tester comprises: a large bending moment is generated at the bonding layer part, and the interlaminar damage cannot be ensured to be completely caused by shearing damage;
a torsion tester: the influence of interlayer friction is not considered, and under the condition of an actual airport pavement, the horizontal force acted on the pavement by the airplane usually comprises the friction between the airplane wheel and the pavement when the airplane normally slides;
③ oblique shearing type tester: failure prior to bonding surface can occur during the course of the experiment.
Along with the continuous increase of air traffic, under the long-term effect of load and environment, the phenomenon that more and more airport cement pavements have not enough anti-skidding performance appears, brings the hidden danger for airport safe operation. As a preventive maintenance technology, the sand fog seal layer has a good treatment effect on the insufficient skid resistance of the airport pavement, but the problem of stripping which occurs when the service life is not reached in the actual engineering becomes a key for restricting the popularization of the technology. The adhesion of the seal needs to be accurately evaluated, and in the aspect of evaluating the influence of large horizontal force on the seal, no large horizontal force shear test aiming at complex stress of the seal of the airport pavement and special environments of airports exists at present, and more interlayer adhesion tests such as additional pavement of new and old pavements, white and black airfield pavement and the like are concentrated.
The seal layer is very thin, and according to the previous test method, the measured interlaminar shear cannot be guaranteed to be generated between the cement pavement and the seal layer, so that the test has large errors, and the seal layer cohesiveness cannot be evaluated correctly. Therefore, a high-horizontal-force shear test method for the airport pavement sealing layer needs to be designed.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems and the defects in the prior art, the invention provides the method for the airport pavement sealing layer large horizontal force shear test, which has the advantages of simple test, strong operability and high precision.
The technical scheme is as follows: big horizontal force shear test device of airport pavement sealing, including the UTM testing machine, its characterized in that: the epoxy asphalt mortar is characterized by also comprising a cement concrete plate, an epoxy asphalt sand fog seal layer, an epoxy adhesive and a metal plate.
The epoxy adhesive bonds and fixes the metal plate, the cement concrete plate and the epoxy asphalt sand fog seal layer into a three-layer structure test piece; the three-layer structure test piece is fastened and fixed by a left chuck and a right chuck on a fixing frame of the UTM machine, and vertical stress is applied by a load chuck of the UTM machine.
The invention also discloses a large horizontal force shear test method for the airport pavement sealing layer, which adopts the experimental device of claim 1 and is characterized by comprising the following steps:
first, the combined test piece is formed
Uniformly spraying prepared sealing layers with different mixing ratios on a cement concrete slab, and after the sealing layer maintenance is finished, cutting the combined test block longitudinally and transversely to divide the combined test block into square test pieces with the length and the width of 10cm so as to adapt to the size of a fixed support chuck in a shearing test device;
second, testing step
2.1) adhering the metal plate to one side of a seal layer of the combined test piece by using epoxy resin AB glue strong glue to manufacture a three-layer structure of a cement flat plate, the seal layer and the metal plate; fixing a test piece by using a UTM machine fixing frame, and uniformly applying the acting force of a load chuck on a cement concrete slab to ensure that a shearing acting surface is positioned between a hardened cement slab and a sand fog sealing layer;
2.2) the situation of large horizontal force applied to the airplane during turning is effectively simulated through the vertical stress applied by the load chuck; the influence of the air temperature on the shear strength of the seal layer when the airplane turns is effectively simulated by adjusting the temperature in the UTM testing machine box to 10 ℃, 30 ℃, 50 ℃ and 70 ℃; recording tangential vertical load and tangential displacement data of the test piece by a computer, calculating the shearing strength Tc of the interlayer interface by a formula (1), drawing a shearing stress-displacement curve graph and carrying out descending curve stage fitting:
in the formula: tc-interlaminar interfacial shear strength (MPa);
p-shear load (N);
a-interfacial layer area (mm)2)；
2.3) calculating the interlaminar fracture energy according to equation (2) based on the shear stress-displacement curve of step 2.2:
in the formula:
interfacial fracture energy (J/m)2)；
Tc-interlaminar interfacial shear strength (MPa);
area (mm) of curve formed by S-shear stress-displacement curve and coordinate axis2)；
And thirdly, analyzing results, and more accurately evaluating the crack resistance of the airport pavement sealing layer by calculating the fracture energy.
The test method also comprises a test piece forming step, and specifically comprises the following steps:
firstly, weighing the mass of various materials according to the mixing proportion of cement concrete, and mixing by adopting a small concrete mixer;
then, pouring the cement concrete into a wood test mold, vibrating and compacting the cement concrete on a cement concrete vibrating table, scraping the place with uneven surface by using a scraper, and performing surface grooving or stone embedding treatment according to the scheme requirement after the cement concrete surface is slightly dry and hard;
and finally, demolding, placing the concrete slab into a standard curing room for curing, and preparing the cement concrete slab.
Has the advantages that: compared with the prior art, the invention has the following advantages:
1) the invention is different from the defects that most of common shear tests can only measure the adhesive force between new and old pavements of a highway pavement, between bridge layers and between white-to-black layers of an airport pavement, and provides a novel method for shear test of the large horizontal force of the airport pavement sealing layer by considering the factors of the large horizontal force of the airport pavement and the thinner thickness of the airport pavement sealing layer.
2) According to the invention, by changing the bonding mode between the test piece materials, the shearing action is ensured to be only generated between the cement concrete slab and the seal layer, the test error is reduced, and the accuracy of the measurement result is improved.
3) The invention utilizes the UTM testing machine to change the test temperature, thereby effectively simulating the influence of the load effect and the air temperature of the airplane on the shear strength of the seal layer when the airplane turns, acquiring the change of the shear strength of the seal layer under the actual temperature condition, and conforming to the influence of the actual service environment on the seal layer of the airport pavement.
4) The invention fills the blank of the prior art for the shear test method of the airport pavement sealing layer, provides the shear test method of the airport pavement sealing layer under the action of large horizontal force, and provides real and effective theoretical support for deeply researching the adhesiveness of the airport pavement sealing layer.
Drawings
Fig. 1 is a schematic structural diagram of a shear test apparatus according to an embodiment of the present invention.
FIG. 2 is a graph of shear load versus displacement and a fitted graph of a descending curve according to an embodiment of the present invention.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
As shown in fig. 1, the present embodiment provides a large horizontal force shear test device for an airport pavement sealing layer, which mainly includes a fixing frame 1, a cement concrete slab 3, an epoxy asphalt sand fog sealing layer 4, an epoxy adhesive 5, a load chuck 2 and a metal plate 6.
The epoxy adhesive 5 adopts epoxy resin AB strong glue, and the epoxy resin AB strong glue is used for respectively bonding and fixing the metal plate 6 and the cement concrete plate 3-epoxy asphalt sand fog seal 4 into a three-layer structure test piece.
The fixing frame 1 comprises a left fixing support and a right fixing support, the left fixing support and the right fixing support are respectively provided with a fixing chuck, and the three-layer structure test piece is fixed through the left fixing support chuck and the right fixing support chuck of the fixing frame. The fixing frame 1 and the load chuck of the embodiment are both based on the existing structural components on the UTM testing machine.
In order to evaluate the adhesiveness of the airport pavement sealing layer, the present example also provides a shear test method of the airport pavement sealing layer with a large horizontal force. The main equipment for the high horizontal force shear test is a large-scale material testing machine UTM. For the epoxy resin asphalt sand fog seal, water-based epoxy resin (A component), amine curing agent (B component), emulsified asphalt and basalt aggregate are selected as main seal materials, seal materials with different mixing ratios and thicknesses are designed and uniformly sprayed on a formed cement concrete slab to manufacture a seal combined test piece.
The airport pavement sealing layer high horizontal force shear test mentioned in the embodiment comprises the following steps:
first, test piece forming
1.1) Cement concrete slab test piece Molding
Firstly weighing the mass of various materials according to the mixing proportion of cement concrete, mixing by adopting a small concrete mixer, pouring into a wood test mould, vibrating on a cement concrete vibrating table to be compact, scraping the place with uneven surface by using a scraper, performing surface grooving or stone embedding treatment according to the scheme requirement after the surface of the cement concrete is slightly dry and hard, then demoulding, and finally putting into a standard curing room for curing, and preparing the cement concrete slab.
1.2) preparation of epoxy resin asphalt Sand fog seal
Preparing epoxy asphalt sand fog seal layers with different mixing proportions by using aqueous epoxy resin (A component), amine curing agent (B component), emulsified asphalt and basalt aggregate.
1.3) Forming of Combined test pieces
The prepared sealing layers with different mixing ratios are uniformly sprayed on a cement concrete slab, and after the sealing layer maintenance is finished, the combined test block is cut longitudinally and transversely and is divided into square test pieces with the length and the width of 10cm so as to adapt to the size of a fixed support chuck in a shearing test device.
Second, testing step
And 2.1) adhering the metal plate to one side of the seal layer of the combined test piece by using epoxy resin AB glue strong glue to manufacture a three-layer structure of a cement flat plate, the seal layer and the metal plate. The test piece is fixed by the fixing frame, and the size of the cross section of the load chuck is half of that of the cement concrete slab, so that the acting force from the UTM is uniformly applied to the cement concrete slab, and the shearing acting surface is ensured to be positioned between the hardened cement slab and the sand fog sealing layer.
2.2) the situation of large horizontal force applied to the airplane during turning is effectively simulated through the vertical stress applied by the load chuck; the influence of the air temperature on the shear strength of the seal layer when the airplane turns is effectively simulated by adjusting the temperature in the UTM testing machine box to 10 ℃, 30 ℃, 50 ℃ and 70 ℃. Recording tangential vertical load and tangential displacement data of the test piece by a computer, calculating the shearing strength Tc of the interlayer interface by a formula (1), drawing a shearing stress-displacement curve graph and carrying out descending curve stage fitting:
in the formula: tc-interlaminar interfacial shear strength (MPa);
p-shear load (N);
a-interfacial layer area (mm)2)。
The shear stress-displacement curve and curve-down phase fit are shown in figure 2.
2.3) calculating the interlaminar fracture energy according to equation (2) based on the shear stress-displacement curve of step 2.2:
in the formula:
interfacial fracture energy (J/m)2)；
Tc-interlaminar interfacial shear strength (MPa);
area (mm) of curve formed by S-shear stress-displacement curve and coordinate axis2)。
Third step, result analysis
The method fully considers the characteristic that the sealing layer of the airport pavement is thinner, fixes the metal plate and the cement slab-sealing layer by the epoxy adhesive to prepare a cement slab-sealing layer-metal block three-layer test piece, and ensures that the shearing action comes from between the sealing layer and the cement concrete slab; the shear test device of the embodiment has a delicate structure, and can directly simulate the condition of large horizontal force borne by the airport pavement in an actual service state through the shear test device; meanwhile, the crack resistance of the airport pavement sealing layer can be more accurately evaluated by calculating the fracture energy.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (3)
1. Big horizontal force shear test device of airport pavement sealing, including the UTM testing machine, its characterized in that: the epoxy asphalt mortar is characterized by also comprising a cement concrete plate, an epoxy asphalt sand fog seal layer, an epoxy adhesive and a metal plate; the epoxy adhesive bonds and fixes the metal plate, the cement concrete plate and the epoxy asphalt sand fog seal layer into a three-layer structure test piece; the three-layer structure test piece is fastened and fixed by a left chuck and a right chuck on a fixing frame of the UTM machine, and vertical stress is applied by a load chuck of the UTM machine.
2. The experimental device of claim 1 is adopted in a high horizontal force shear test method of an airport pavement sealing layer, and is characterized by comprising the following steps:
first, the combined test piece is formed
Uniformly spraying prepared sealing layers with different mixing ratios on a cement concrete slab, and after the sealing layer maintenance is finished, cutting the combined test block longitudinally and transversely to divide the combined test block into square test pieces with the length and the width of 10cm so as to adapt to the size of a fixed support chuck in a shearing test device;
second, testing step
2.1) adhering the metal plate to one side of a seal layer of the combined test piece by using epoxy resin AB glue strong glue to manufacture a three-layer structure of a cement flat plate, the seal layer and the metal plate; fixing a test piece by using a UTM machine fixing frame, and uniformly applying the acting force of a load chuck on a cement concrete slab to ensure that a shearing acting surface is positioned between a hardened cement slab and a sand fog sealing layer;
2.2) the situation of large horizontal force applied to the airplane during turning is effectively simulated through the vertical stress applied by the load chuck; the influence of the air temperature on the shear strength of the seal layer when the airplane turns is effectively simulated by adjusting the temperature in the UTM testing machine box to 10 ℃, 30 ℃, 50 ℃ and 70 ℃; recording tangential vertical load and tangential displacement data of the test piece by a computer, calculating the shearing strength Tc of the interlayer interface by a formula (1), drawing a shearing stress-displacement curve graph and carrying out descending curve stage fitting:
in the formula: tc-interlaminar interfacial shear strength (MPa);
p-shear load (N);
a-interfacial layer area (mm)2)；
2.3) calculating the interlaminar fracture energy according to equation (2) based on the shear stress-displacement curve of step 2.2:
in the formula:
interfacial fracture energy (J/m)2)；
Tc-interlaminar interfacial shear strength (MPa);
area (mm) of curve formed by S-shear stress-displacement curve and coordinate axis2)；
And thirdly, analyzing results, and more accurately evaluating the crack resistance of the airport pavement sealing layer by calculating the fracture energy.
3. The method for testing the airport pavement sealing layer shear with large horizontal force according to claim 2, further comprising a test piece forming step, and specifically comprises the following steps:
firstly, weighing the mass of various materials according to the mixing proportion of cement concrete, and mixing by adopting a small concrete mixer;
then, pouring the cement concrete into a wood test mold, vibrating and compacting the cement concrete on a cement concrete vibrating table, scraping the place with uneven surface by using a scraper, and performing surface grooving or stone embedding treatment according to the scheme requirement after the cement concrete surface is slightly dry and hard;
finally, demoulding and putting the product into a standard curing room for curing.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080047213A (en) * | 2006-11-24 | 2008-05-28 | 한국철도기술연구원 | Compressive loading machine with roller supported steel brush loading platen |
| CN201199223Y (en) * | 2008-03-24 | 2009-02-25 | 山东省交通科学研究所 | Portable tester for interlayer cementing straight scissors for highway |
| CN103743632A (en) * | 2014-01-21 | 2014-04-23 | 沈阳建筑大学 | Method for evaluating shear resistance of waterproof adhesive layer paved on asphaltic sand bridge deck |
| CN204228540U (en) * | 2014-11-24 | 2015-03-25 | 甘肃省交通规划勘察设计院有限责任公司 | A kind of compound direct shear performance test fixture of supporting UTM testing machine |
| US20180031457A1 (en) * | 2016-07-26 | 2018-02-01 | Shandong University Of Science And Technology | Shear test device and test method of rock mass discontinuities under constant normal stiffness condition |
| CN207210958U (en) * | 2017-05-12 | 2018-04-10 | 广东中和正通工程技术有限公司 | A kind of bridge deck water-proof tack coat and a kind of bridge floor |
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- 2021-05-25 CN CN202110575186.3A patent/CN113310822B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080047213A (en) * | 2006-11-24 | 2008-05-28 | 한국철도기술연구원 | Compressive loading machine with roller supported steel brush loading platen |
| CN201199223Y (en) * | 2008-03-24 | 2009-02-25 | 山东省交通科学研究所 | Portable tester for interlayer cementing straight scissors for highway |
| CN103743632A (en) * | 2014-01-21 | 2014-04-23 | 沈阳建筑大学 | Method for evaluating shear resistance of waterproof adhesive layer paved on asphaltic sand bridge deck |
| CN204228540U (en) * | 2014-11-24 | 2015-03-25 | 甘肃省交通规划勘察设计院有限责任公司 | A kind of compound direct shear performance test fixture of supporting UTM testing machine |
| US20180031457A1 (en) * | 2016-07-26 | 2018-02-01 | Shandong University Of Science And Technology | Shear test device and test method of rock mass discontinuities under constant normal stiffness condition |
| CN207210958U (en) * | 2017-05-12 | 2018-04-10 | 广东中和正通工程技术有限公司 | A kind of bridge deck water-proof tack coat and a kind of bridge floor |
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