CN110864979A - Method for detecting high-temperature shear resistance of waterproof coiled material - Google Patents
Method for detecting high-temperature shear resistance of waterproof coiled material Download PDFInfo
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- CN110864979A CN110864979A CN201911163919.1A CN201911163919A CN110864979A CN 110864979 A CN110864979 A CN 110864979A CN 201911163919 A CN201911163919 A CN 201911163919A CN 110864979 A CN110864979 A CN 110864979A
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- test piece
- protective layer
- layer
- stress simulation
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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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0033—Weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
Abstract
The application relates to the technical field of building waterproof engineering, in particular to a method for detecting the high-temperature shear resistance of a waterproof coiled material. The detection method comprises the following steps: s1, providing a test piece, wherein the test piece comprises a substrate layer, a coil layer and a protective layer which are sequentially bonded; s2, adhering a negative weight on the surface of the protective layer of the test piece; s3, placing the test piece at a first angle in an inclined mode at a first temperature so as to perform stress simulation on the test piece; and S4, determining the position change of the protective layer of the test piece before and after the stress simulation. Through the scheme, the accuracy of the detection result can be improved, and the probability of abnormal actual use links caused by only considering the high-temperature resistance and shear resistance of the coiled material can be reduced.
Description
Technical Field
The application relates to the technical field of building waterproof engineering, in particular to a method for detecting the high-temperature shear resistance of a waterproof coiled material.
Background
The waterproof roll is usually hidden inside a building in the application process, and the application of roof and basement roof is taken as an example: the coiled material forms good bonding with the structure, and the protective layer of coiled material upper surface all need by conducting to the substrate layer through the coiled material with other structures on upper portion, and under the circumstances that there is the certain slope in the substrate layer, the coiled material will bear certain shearing force. In the prior art, the material testing link of the waterproof coiled material does not consider the external shearing force bearing, so that the actual use link is abnormal although the product is qualified in the test.
Disclosure of Invention
The technical problem that this application mainly solved provides a waterproofing membrane high temperature resistance to shear ability's detection method, can improve the accuracy of testing result, can reduce because only consider the high temperature resistance to shear performance of coiled material self and the unusual probability of appearance of in-service use link that leads to.
In order to solve the above problems, the present application provides a method for detecting high temperature shear resistance of a waterproof roll, comprising:
s1, providing a test piece, wherein the test piece comprises a substrate layer, a coil layer and a protective layer which are sequentially bonded;
s2, adhering a negative weight on the surface of the protective layer of the test piece;
s3, placing the test piece at a first angle in an inclined mode at a first temperature so as to perform stress simulation on the test piece;
and S4, determining the position change of the protective layer of the test piece before and after the stress simulation.
Preferably, before the surface of the protective layer of the test piece is adhered with a negative weight, the method further comprises the following steps:
the test piece is horizontally placed to be cured.
Preferably, after determining the position change of the protective layer of the test piece before and after the stress simulation, the method further includes:
s5, when the position change is smaller than a first preset threshold value, increasing the weight of the negative weight, and repeating the steps S2 to S4; when the position change is greater than or equal to a first preset threshold, the weight of the negative-weight block is the shear strength of the web layer at a first temperature and at a first angle.
Preferably, before detecting the position change of the protective layer of the test piece before and after the stress simulation, the method further includes:
and horizontally placing the test piece after the stress simulation so as to cool the test piece.
Preferably, the base material layer is a roof boarding, and/or the protective layer is a plywood.
Preferably, the area of the roll layer is equal to the area of the protective layer, and the area of the substrate layer is larger than the area of the roll layer.
Preferably, the first temperature is 40 ℃ to 70 ℃.
Preferably, the first angle is 5 ° to 90 °.
Preferably, the negative weight is adhered to a central position of the protective layer.
Preferably, before the force simulation, the method further comprises: acquiring a first shot image of the test piece;
after the force simulation, the method further comprises the following steps: acquiring a second shot image of the test piece;
the determining the position change of the protective layer of the test piece before and after the stress simulation comprises:
determining the position change of the protective layer of the test piece before and after stress simulation based on the first shot image and the second shot image;
or the like, or, alternatively,
before the stress simulation, the method further comprises the following steps: marking the position of the protective layer to obtain a first mark;
after the force simulation, the method further comprises the following steps: marking the position of the protective layer to obtain a second mark;
the determining the position change of the protective layer of the test piece before and after the stress simulation comprises:
and determining the position change of the protective layer of the test piece before and after the stress simulation based on the first mark and the second mark.
The beneficial effect of this application is: according to the detection method, the load is arranged on the protective layer bonded with the coil layer to simulate the stress condition of the coil layer in the actual application process, and the environment condition of the coil layer in the actual application process is simulated by setting the first temperature and the first angle.
Drawings
FIG. 1 is a flow chart of a first embodiment of the method for testing the high temperature shearing resistance of a waterproof roll according to the present application;
FIG. 2 is a schematic view of a test piece in the detection method of the present application;
FIG. 3 is a schematic cross-sectional view of a test piece in the detection method of the present application;
FIG. 4 is a flow chart of a second embodiment of the method for testing the high temperature shearing resistance of the waterproof roll of the present application;
FIG. 5 is a flow chart of a third embodiment of the method for testing the high temperature shearing resistance of the waterproof roll of the present application;
FIG. 6 is a flow chart of a fourth embodiment of the method for testing the high temperature shearing resistance of the waterproof roll.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for detecting high temperature shear resistance of a waterproof roll according to a first embodiment of the present invention. Referring to fig. 1, the detection method specifically includes the following steps:
s101, providing a test piece, wherein the test piece comprises a substrate layer, a coil material layer and a protective layer which are sequentially bonded.
In this embodiment, referring to fig. 2 and 3, the test piece 100 includes a substrate layer 101, a roll layer 102 adhered to the substrate layer 101, and a protection layer 103 adhered to the roll layer 102.
Specifically, a substrate of a desired size is selected, the waterproof roll to be tested is cut into a desired size, the protective material is cut into a desired size, in an alternative embodiment, a tile of 235mm × 115mm × 15mm can be selected as the substrate, and the waterproof roll and the protective material are cut into the same size, for example, a size of 100mm × 150 mm; then, a 100mm × 150mm waterproof roll was stuck to the middle of the base material, the upper surface of the waterproof roll was coated with a thermosetting adhesive, and a 100mm × 150mm protective material was stuck to the upper surface of the waterproof roll in alignment to form a test piece 100 shown in fig. 2 and 3; the test piece 100 is then placed flat in the curing chamber to cure the thermosetting adhesive between the web layer 102 and the protective layer 103. It will be appreciated by those skilled in the art that in other embodiments, the substrate, waterproofing membrane, and protective material used to form the test piece 100 may be configured in other sizes.
In an alternative embodiment, the substrate layer 101 is a roofing board or roofing tile and the protective layer 103 is a plywood, for example, a plywood. It should be understood by those skilled in the art that in other embodiments, the substrate layer 101 is not limited to a roofing tile or panel, but may be a cementitious product of other blocks.
S102, adhering a negative weight on the surface of the protective layer of the test piece.
In this embodiment, a weight 104 is adhered to the center of the protection layer 103 of the test piece 100, the weight 104 is used for simulating the force applied to the coil layer 102 by other structures on the roof of the building above the substrate layer 101 in the subsequent steps, and the weight 104 is disposed on the protection layer 103 instead of being directly disposed on the coil layer 102, so that the force applied to the coil layer 102 by the weight 104 is more uniform by using the protection layer 103 as a fixed and dispersed bearing plate, and the influence of stress concentration on the test result is avoided.
In this embodiment, the weight of the weight block 104 may be 0.5kg to 5 kg. Further, the weight block 104 may be an iron block.
S103, placing the test piece obliquely at a first angle at a first temperature so as to perform stress simulation on the test piece.
In an alternative embodiment, the test piece 10 may be placed in an oven with the substrate layer 101 facing downward, and the oven may be set to a first temperature, and placed in the oven for 2h to 72h to simulate the stress of the roll layer 102 at the first angle and the first temperature. Of course, those skilled in the art will appreciate that in other embodiments, other devices may be used to simulate the force applied to the test piece 100.
In this embodiment, the first angle may be 5 ° to 90 °, preferably 15 °; the first temperature may be 40 ℃ to 70 ℃.
During the placement of the test piece 100, the web layer 102 is subjected to a shearing force by the weight block 104, and when the shearing force exceeds the ultimate strength of the web layer 102, the web layer 102 is cut, causing the protective layer 103 on the web layer 102 to slide relative thereto.
And S104, determining the position change of the protective layer of the test piece before and after the stress simulation.
In the present embodiment, the ability of the web layer 102 to resist shear slip, i.e., the shear resistance, is reflected by the change in position of the protective layer 103.
According to the detection method provided by the embodiment of the invention, the load is arranged on the protective layer bonded with the coil layer to simulate the stress condition of the coil layer in the practical application process, and the environment condition of the coil layer in the practical application process is simulated by setting the first temperature and the first angle.
Referring to fig. 4, fig. 4 is a flowchart illustrating a method for detecting the high temperature shear resistance of a waterproof roll according to a second embodiment of the present invention. Referring to fig. 4, the detection method specifically includes the following steps:
s201, providing a test piece, wherein the test piece comprises a substrate layer, a coil material layer and a protective layer which are sequentially bonded.
S202, adhering a negative weight on the surface of the protective layer of the test piece.
S203, placing the test piece obliquely at a first angle at a first temperature so as to perform stress simulation on the test piece.
S204, determining the position change of the protective layer of the test piece before and after the stress simulation.
S205, when the position change is smaller than a first preset threshold, increasing the weight of the weight block, and repeating the steps S202 to S204; when the position change is greater than or equal to a first preset threshold, the weight of the negative-weight block is the shear strength of the web layer at a first temperature and a first angle.
Steps S201 to S204 refer to the first embodiment specifically, and are not described in detail herein.
In this embodiment, in order to detect the shear strength of the coil layer 102 at a specific temperature and a specific inclination angle, a first temperature and a first angle are set, and the weight of the weight block 104 is gradually increased from small to large until the position change of the protective layer 103 reaches a preset threshold, at this time, the weight of the corresponding weight block 104 is the guiding weight of other structures on the roof of the building above the substrate layer 101.
In step S205, when the position change is smaller than the first predetermined threshold, the weight of the weight block needs to be increased to continue the detection until the position change is greater than or equal to the first predetermined threshold, so as to approach as close as possible to the threshold value (the weight threshold value of the weight block) of which the position change exceeds the first predetermined threshold.
In this embodiment, the first preset threshold may be 2 mm.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for detecting the high temperature shear resistance of a waterproof roll according to a third embodiment of the present invention. Referring to fig. 5, the detecting method specifically includes the following steps:
s301, providing a test piece, wherein the test piece comprises a substrate layer, a coil material layer and a protective layer which are sequentially bonded.
S302, adhering a negative weight on the surface of the protective layer of the test piece.
S303, marking the position of the protective layer to obtain a first mark.
S304, placing the test piece obliquely at a first angle at a first temperature so as to perform stress simulation on the test piece.
S305, marking the position of the protective layer to obtain a second mark.
S306, based on the first mark and the second mark, determining the position change of the protective layer of the test piece before and after the stress simulation.
Step S301, step S302, and step S304 refer to the description of the first embodiment specifically, and are not described in detail here.
In the present embodiment, the positions of the protective layers 103 are respectively marked before and after the force simulation, for example, marking lines are directly drawn. In step S306, the distance between the first marker and the second marker is taken as the position change. Those skilled in the art will appreciate that in other embodiments, location identification may be performed in other ways.
In this embodiment, in order to facilitate the identification of the position of the protection layer 103, in an alternative embodiment, the area of the roll layer 102 is equal to the area of the protection layer 103, and the area of the substrate layer 101 is larger than the area of the protection layer 103.
Referring to fig. 6, fig. 6 is a flowchart illustrating a method for detecting the high temperature shear resistance of a waterproof roll according to a fourth embodiment of the present invention. Referring to fig. 6, the detection method specifically includes the following steps:
s401, providing a test piece, wherein the test piece comprises a substrate layer, a coil material layer and a protective layer which are sequentially bonded.
S402, adhering a negative weight on the surface of the protective layer of the test piece.
S403, a first captured image of the test piece is acquired.
S404, placing the test piece in a first angle in an inclined mode at a first temperature so as to perform stress simulation on the test piece.
S405, a second captured image of the test piece is acquired.
S406, determining the position change of the protective layer of the test piece before and after the stress simulation based on the first shot image and the second shot image.
Step S401, step S402, and step S404 refer to the description of the first embodiment specifically, and are not described in detail here.
The present embodiment is different from the third embodiment in that the detection of the position change of the protective layer 103 is realized by a visualization and datamation means in the present embodiment. Specifically, by acquiring the shot images of the test piece 100 before and after the force application simulation, respectively, the positional change is acquired through the analysis of the first shot image and the second shot image in step S406.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (10)
1. A method for detecting the high-temperature shear resistance of a waterproof roll is characterized by comprising the following steps:
s1, providing a test piece, wherein the test piece comprises a substrate layer, a coil layer and a protective layer which are sequentially bonded;
s2, adhering a negative weight on the surface of the protective layer of the test piece;
s3, placing the test piece at a first angle in an inclined mode at a first temperature so as to perform stress simulation on the test piece;
and S4, determining the position change of the protective layer of the test piece before and after the stress simulation.
2. The method for detecting according to claim 1, wherein before the step of adhering a negative weight to the surface of the protective layer of the test piece, the method further comprises:
the test piece is horizontally placed to be cured.
3. The method of claim 1, wherein after determining the change in position of the protective layer of the test piece before and after the force simulation, further comprising:
s5, when the position change is smaller than a first preset threshold value, increasing the weight of the negative weight, and repeating the steps S2 to S4; when the position change is greater than or equal to a first preset threshold, the weight of the negative-weight block is the shear strength of the web layer at a first temperature and at a first angle.
4. The method according to claim 1, wherein before detecting the change in the position of the protective layer of the test piece before and after the force simulation, the method further comprises:
and horizontally placing the test piece after the stress simulation so as to cool the test piece.
5. The detection method according to any one of claims 1 to 4, wherein the base material layer is a roof board and/or the protective layer is a plywood board.
6. The detection method according to any one of claims 1 to 4, wherein the area of the web layer is equal to the area of the protective layer, and the area of the base material layer is larger than the area of the web layer.
7. The detection method according to any one of claims 1 to 4, wherein the first temperature is 40 ℃ to 70 ℃.
8. The detection method according to any one of claims 1 to 4, wherein the first angle is 5 ° to 90 °.
9. The detection method according to any one of claims 1 to 4, wherein the negative weight is adhered to a central position of the protective layer.
10. The detection method according to any one of claims 1 to 4,
before the stress simulation, the method further comprises the following steps: acquiring a first shot image of the test piece;
after the force simulation, the method further comprises the following steps: acquiring a second shot image of the test piece;
the determining the position change of the protective layer of the test piece before and after the stress simulation comprises:
determining the position change of the protective layer of the test piece before and after stress simulation based on the first shot image and the second shot image;
or the like, or, alternatively,
before the stress simulation, the method further comprises the following steps: marking the position of the protective layer to obtain a first mark;
after the force simulation, the method further comprises the following steps: marking the position of the protective layer to obtain a second mark;
the determining the position change of the protective layer of the test piece before and after the stress simulation comprises:
and determining the position change of the protective layer of the test piece before and after the stress simulation based on the first mark and the second mark.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911163919.1A CN110864979A (en) | 2019-11-25 | 2019-11-25 | Method for detecting high-temperature shear resistance of waterproof coiled material |
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| CN201911163919.1A CN110864979A (en) | 2019-11-25 | 2019-11-25 | Method for detecting high-temperature shear resistance of waterproof coiled material |
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Application publication date: 20200306 |