CN112924381A - Method for measuring ice-asphalt pavement bonding force - Google Patents
Method for measuring ice-asphalt pavement bonding force Download PDFInfo
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- CN112924381A CN112924381A CN202110171589.1A CN202110171589A CN112924381A CN 112924381 A CN112924381 A CN 112924381A CN 202110171589 A CN202110171589 A CN 202110171589A CN 112924381 A CN112924381 A CN 112924381A
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- spindle
- ice
- test
- asphalt pavement
- polyester felt
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
Abstract
The invention provides a method for measuring the bonding force between ice-asphalt pavements; the area of a test area is fixed by adopting nail-free glue, so that the thickness of the water film is consistent in each test process; the metal plate is bonded with the drawing spindle through epoxy resin and a curing agent, the metal plate is bonded with the polyester felt through self-carried super glue, and the interface separation between the ice layer and the asphalt pavement can only occur at the interface when the drawing device applies pulling force by utilizing the water absorption of the polyester felt and the reinforcement effect of the polyester felt surface fibers on ice. The technical problem that the water film thickness cannot be controlled, and the measured value of the adhesive force between the ice layer and the asphalt pavement is actually the resultant force of the adhesive force between the real ice layer and the asphalt pavement and the cohesive force when the ice layer is broken in the prior art is solved skillfully. The invention has real and accurate measuring result and universality.
Description
Technical Field
The invention belongs to the field of material ice and snow prevention performance test; in particular to a method for measuring the bonding force of ice-asphalt pavement.
Background
With the increasing development of road ice and snow removal technology, the research on anti-freezing and anti-sticking road surfaces and snow melting road surfaces is also deepened gradually, and the research on corresponding evaluation methods is also very important for better popularization of the functional road surface materials. Since the research of the technology starts earlier in Japan and Europe, a relatively mature system is formed by corresponding evaluation methods, but in recent years, the evaluation methods are not upgraded and updated, most of the evaluation methods continue to use some qualitative evaluation methods proposed before, and cannot meet the new materials which are different day by day; most of evaluation methods proposed in China in recent years are mainly large instruments, and are single in function, low in practicability, high in price and insufficient in system.
FIG. 1 is a flow chart of a prior art measurement method.
As shown in FIG. 1, the method for measuring the adhesion of the ice-asphalt pavement in the prior art mainly comprises the following steps:
firstly, manufacturing a cement concrete spindle by using cement mortar as required, and fixing a screw rod for connecting the spindle and a tester in the cement mortar in advance during molding;
then, completely assembling the manufactured spindle, the test piece and each part of the tester, placing the whole device in a test box, and preserving heat for a certain time at a test temperature;
slowly pouring a certain amount of deionized water from the center of the test area to fill the test area with deionized water and ensure that most of the deionized water is in the test area;
then, slowly superposing the spindle with a test area filled with water from one end to the other end, avoiding the existence of air bubbles at the bottom of the spindle, and setting the test temperature and the freezing time to enable the test piece and the spindle to be frozen and adhered;
and finally, slowly loading and reading data through the testing device.
However, in the ice-asphalt pavement adhesion force measuring method in the prior art, the water film thickness is inconsistent in each testing process because the water film area cannot be controlled; the ice sheet area is greater than the test contact area, and when the pulling force device applyed the load and made ice sheet and bituminous paving interfacial separation, it is greater than the test area or because there is the bubble in the ice sheet inside to easily take place to pull the area off, and then leads to ice sheet self to produce the fracture for bituminous paving remains a large amount of ices.
The cohesive force loss caused by the fracture of the ice layer cannot be deducted, so the value of the adhesive force between the ice and the asphalt pavement detected by the measuring method in the prior art is actually the adhesive force between the real ice layer and the asphalt pavement and the cohesive force when the ice layer fractures per se, and the resultant force of the adhesive force and the cohesive force.
That is, the test results of the prior art measurement method are not real and inaccurate.
Disclosure of Invention
The invention aims to provide a method for measuring the bonding force of an ice-asphalt pavement.
The invention is realized by the following technical scheme:
the invention relates to a method for measuring the bonding force between ice and asphalt pavements, which comprises the following steps:
firstly, manufacturing a cement concrete spindle by using cement mortar as required, and fixing a screw rod for connecting the spindle and a tester in the cement mortar in advance during molding;
secondly, combining the polyester felt with the metal plate with a spindle through epoxy resin and a curing agent, and fixing the periphery of the polyester felt on the spindle by using a fixing metal ring and screws;
thirdly, determining a plurality of test areas on the surface of the track plate according to the size and the shape of the spindle;
fourthly, surrounding the test area by using nail-free glue;
fifthly, completely assembling the spindle with the polyester felt, the test piece and each part of the tester, then placing the whole device in a test box, and preserving heat for a certain time at the test temperature;
sixthly, slowly pouring a certain amount of deionized water from the center of the test area to fill the test area with the deionized water;
seventhly, slowly placing the spindle into a testing area in the nail-free glue, rotating left and right to avoid bubbles at the bottom of the spindle, and setting the testing temperature and the freezing time to enable the test piece and the spindle to be frozen and adhered;
and step eight, slowly loading and reading data through the testing device.
According to the method for measuring the bonding force between the ice and the asphalt pavement, the nail-free glue is introduced, and the water film thickness in each measuring process is consistent by utilizing the strong bonding property, the good sealing property and the consistent size of a test area of the nail-free glue and the asphalt pavement;
the invention relates to a method for measuring the adhesive force between ice and asphalt pavements, which introduces a polyester felt, enhances the cohesive force of ice by utilizing the water absorption of the polyester felt and the reinforcement effect of fine fibers on the surface of the polyester felt on an ice layer, and adopts a simple and practical technical means to ensure that only the adhesive force between ice and an asphalt pavement interface can be measured when the adhesive force between ice and asphalt pavements is measured: under the action of load applied by a testing device, only the interface separation of the ice layer and the asphalt pavement can be generated at the interface, and the phenomenon of the self fracture of the ice layer in the prior art can not be generated, thereby skillfully solving the problem that the size and the thickness of a water film can not be controlled in the prior art; the detected value of the adhesion between the ice and the asphalt pavement is actually the technical problem of the resultant force of the actual adhesion between the ice and the asphalt pavement and the cohesion when the ice layer breaks.
The method for measuring the bonding force between the ice and the asphalt pavement has the advantages of real and accurate measurement result and controllable measurement precision.
The adhesive force of the ice-asphalt pavement is smaller than that of a spindle, epoxy resin and a curing agent, adhesive force of a metal plate, the epoxy resin, the curing agent and a strong adhesive and adhesive force of a polyester felt and the strong adhesive.
The scheme of the invention is not limited to polyester felt, and the polyester felt is made of similar materials which have similar functions, certain thickness and enough toughness; for other types of spindles, the size and shape of the edge fixing metal ring and the metal plate are changed to fix the polyester felt.
The invention has the following advantages: according to the method for measuring the bonding force between the ice and the asphalt pavement, the nail-free glue is introduced, and the water film thickness in each measuring process is consistent by utilizing the strong bonding property, the good sealing property and the consistent size of a test area of the nail-free glue and the asphalt pavement; according to the method for measuring the bonding force between the ice and the asphalt pavement, the polyester felt is introduced, and the cohesion of the ice is enhanced by utilizing the water absorption of the polyester felt and the reinforcement effect of fine fibers on the surface of the polyester felt on an ice layer; the method for measuring the bonding force between the ice and the asphalt pavement has the advantages of real and accurate measurement result and controllable measurement precision.
Drawings
FIG. 1 is a flow chart of a prior art measurement method;
FIG. 2 is a process flow diagram of a test method of the present invention;
FIG. 3 is an operational diagram of the test method of the present invention;
fig. 4 is a graph showing the effect of the present invention compared with the prior art.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only illustrative of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The present embodiment relates to a method for measuring the adhesion between ice and asphalt pavement, as shown in fig. 2 and 3: the method comprises the following steps:
firstly, manufacturing a spindle 1 used for testing by using hydrophilic quartz sand cement mortar, wherein the molding height is 68mm, the diameter is 101mm, and the connecting spindle and a screw 2 of an XH-40 type concrete strength drawing instrument of Beijing Tiandi spark science and technology development Limited company are fixed in the cement mortar in advance during molding, and the pre-buried depth is 50 mm;
secondly, combining a polyester felt 4 with a circular metal plate 3 with the diameter of 101mm with a spindle through epoxy resin and a curing agent, wherein the polyester felt is 3mm thick, and is fixed on the spindle 1 by a fixing metal ring 5 with the width of 15mm and reserved with 4 screw holes of 5mm and M5 screws 6 with the width of 20 mm;
thirdly, four circular test areas 8 with the diameter of 102mm are determined on the surface of an AC-5 rutting plate 7 with the diameter of 300mm multiplied by 50mm according to the size and the shape of the spindle 1;
fourthly, using green butterfly ecological nail-free glue 9 to enclose and block the periphery of the test area 8, wherein the enclosing height is 10 mm;
fifthly, completely assembling the spindle with the polyester felt, the test piece and each part of the tester, then placing the whole device in a test box, and preserving heat for 30min at-4 ℃;
sixthly, slowly pouring 20ml of deionized water from the center of the test area 8 to fill the test area with the deionized water;
seventhly, slowly placing the spindle into a testing area in the nail-free glue, rotating left and right to avoid bubbles at the bottom of the spindle, and setting the temperature to be 4 ℃ below zero and the freezing time to be 3 hours to enable the test piece and the spindle to be frozen and adhered;
and step eight, slowly loading and reading data through the testing device.
Example 2
The present embodiment relates to a method for measuring the adhesion between ice and asphalt pavement, as shown in fig. 2 and 3: the method comprises the following steps:
the procedure was as in example 1 except for the third step of AC-5 to AC-13 rut plate replacement. Table 1 shows the comparison of the test results of the prior art and the present invention:
TABLE 1
As can be seen from table 1: in the prior art, the measurement result has larger discreteness, and the measurement result is more accurate, real and stable. As can be seen from FIG. 4, the areas of the water films in the prior art are not uniform, so that the thickness of the ice layer cannot be controlled, and more ice remains on the surface of the test piece. These factors will inevitably cause large errors in measurement results and unstable data. The measuring method can ensure that the thicknesses of the ice layers are the same because the testing areas are fixed and consistent in size, and only a small amount of ice remains on the test piece after the test is finished, so that the difference of the testing results of the method is very small.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (1)
1. A method for measuring the bonding force between ice and asphalt pavements is characterized by comprising the following steps:
firstly, manufacturing a cement concrete spindle by using cement mortar as required, and fixing a screw rod for connecting the spindle and a tester in the cement mortar in advance during molding;
secondly, combining the polyester felt with the metal plate with a spindle through epoxy resin and a curing agent, and fixing the periphery of the polyester felt on the spindle by using a fixing metal ring and screws;
thirdly, determining a plurality of test areas on the surface of the track plate according to the size and the shape of the spindle;
fourthly, surrounding the test area by using nail-free glue;
fifthly, completely assembling the spindle with the polyester felt, the test piece and each part of the tester, then placing the whole device in a test box, and preserving heat for a certain time at the test temperature;
sixthly, slowly pouring a certain amount of deionized water from the center of the test area to fill the test area with the deionized water;
seventhly, slowly placing the spindle into a testing area in the nail-free glue, rotating left and right to avoid bubbles at the bottom of the spindle, and setting the testing temperature and the freezing time to enable the test piece and the spindle to be frozen and adhered;
and step eight, slowly loading and reading data through the testing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110171589.1A CN112924381A (en) | 2021-02-08 | 2021-02-08 | Method for measuring ice-asphalt pavement bonding force |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110171589.1A CN112924381A (en) | 2021-02-08 | 2021-02-08 | Method for measuring ice-asphalt pavement bonding force |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980847A (en) * | 2012-11-27 | 2013-03-20 | 东南大学 | Method for testing bonding strength of asphalt pavement and road surface ice |
| CN104374692A (en) * | 2014-09-23 | 2015-02-25 | 武汉理工大学 | Testing method for adhesion between asphalt concrete and asphalt concrete surface ice layer |
| CN106248574A (en) * | 2016-07-25 | 2016-12-21 | 哈尔滨工业大学 | A kind of Portable type ice Bituminous Pavement cohesive force sensing equipment and method |
| CN212459349U (en) * | 2020-06-03 | 2021-02-02 | 山西路桥建设集团有限公司 | Testing arrangement of ice-bituminous paving adhesion |
-
2021
- 2021-02-08 CN CN202110171589.1A patent/CN112924381A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980847A (en) * | 2012-11-27 | 2013-03-20 | 东南大学 | Method for testing bonding strength of asphalt pavement and road surface ice |
| CN104374692A (en) * | 2014-09-23 | 2015-02-25 | 武汉理工大学 | Testing method for adhesion between asphalt concrete and asphalt concrete surface ice layer |
| CN106248574A (en) * | 2016-07-25 | 2016-12-21 | 哈尔滨工业大学 | A kind of Portable type ice Bituminous Pavement cohesive force sensing equipment and method |
| CN212459349U (en) * | 2020-06-03 | 2021-02-02 | 山西路桥建设集团有限公司 | Testing arrangement of ice-bituminous paving adhesion |
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Application publication date: 20210608 |