CN108444792B - Forming die for testing bonding performance between concrete layers and testing method thereof - Google Patents
Forming die for testing bonding performance between concrete layers and testing method thereof Download PDFInfo
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- CN108444792B CN108444792B CN201810671945.4A CN201810671945A CN108444792B CN 108444792 B CN108444792 B CN 108444792B CN 201810671945 A CN201810671945 A CN 201810671945A CN 108444792 B CN108444792 B CN 108444792B
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- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 239000010410 layer Substances 0.000 claims abstract description 46
- 239000011229 interlayer Substances 0.000 claims abstract description 41
- 239000011230 binding agent Substances 0.000 claims abstract description 20
- 238000010998 test method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 27
- 238000011056 performance test Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- General Health & Medical Sciences (AREA)
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- Immunology (AREA)
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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 forming die for testing the bonding performance between concrete layers and a test method thereof, belonging to the technical field of highway engineering. The die comprises a cylindrical die, a rectangular base, a measuring ruler and a trowelling plate; the rectangular base is provided with a fixed clamping groove, and the bottom end of the cylindrical die is clamped in the fixed clamping groove; a plurality of leveling bolts are arranged around the rectangular base; the cylindrical die comprises a left semicircular shell and a right semicircular shell, and one side of the left semicircular shell is hinged with one side of the right semicircular shell; the other side of the left semicircular shell is detachably connected with the other side of the right semicircular shell; the dipperstick sets up perpendicularly, and bottom mounting is on the screed that the level set up. The die is used for integrally forming the interlayer binder and the concrete structure layer, can accurately control the dosage and thickness of the binder, is convenient for fixing and disassembling a test piece, and maximally avoids disturbance of human factors on interlayer binding capacity, thereby achieving the purpose of accurately evaluating the performance of the interlayer binder.
Description
Technical Field
The invention belongs to the technical field of highway engineering in traffic transportation engineering, and particularly relates to a concrete interlayer bonding performance test forming die and a test method thereof.
Background
The pavement structure is a multi-layer composite structure formed by combining different materials, the bonding capacities among different structural layers are obviously different due to the difference of interlayer bonding materials, and under the action of running load, the different interlayer bonding can directly influence the capacity of the pavement structure for transmitting load, and meanwhile, the stress strain level in the pavement structure, especially the interlayer bonding position, can be influenced, and even the normal service performance and the service life of the pavement structure can be seriously influenced. In the indoor test of the bonding capacity of the interlayer bonding material, the interlayer bonding material is coated after the concrete structure layer is independently prepared and cured, and no good integrated forming tool exists, so that the method is not in line with the actual engineering that the interlayer bonding material and the concrete structure layer are paved and cured simultaneously, the influence of the interpenetration of the interlayer bonding material and the concrete structure layer in the preparation and curing process is ignored, the coating amount and thickness of the bonding material are difficult to accurately control, and the evaluation result of the bonding capacity of the interlayer bonding material is influenced. Meanwhile, the sizes of the prepared test pieces are not uniform, and the test pieces are required to be cut when being tested, so that disturbance on interlayer binders is avoided. Therefore, in order to facilitate the integrated formation of the interlayer binder and the concrete structure layer, meet the practical engineering requirements, and accurately evaluate the bonding capability of the interlayer binder on the concrete structure layer, it is highly desirable to develop a test forming die for testing the bonding capability between the concrete layers and a test method thereof.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a forming die for testing interlayer bonding performance of concrete and a testing method thereof, which are used for integrally forming interlayer bonding materials and a concrete structure layer, accurately controlling the dosage and thickness of the bonding materials, simultaneously facilitating the fixing and the disassembly of test pieces, reducing the influence of human factors on the performance of the interlayer bonding materials, avoiding the disturbance of human factors on the interlayer bonding capacity to the maximum extent, and further achieving the purpose of accurately evaluating the performance of the interlayer bonding materials.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a concrete inter-layer bonding performance test forming die comprises a cylindrical die, a rectangular base, a measuring ruler and a trowelling plate;
the rectangular base is provided with a fixed clamping groove, and the bottom end of the cylindrical die is clamped in the fixed clamping groove;
a plurality of leveling bolts are arranged around the rectangular base;
The cylindrical die comprises a left semicircular shell and a right semicircular shell, and one side of the left semicircular shell is hinged with one side of the right semicircular shell; the other side of the left semicircular shell is detachably connected with the other side of the right semicircular shell;
the measuring ruler is vertically arranged, and the bottom end of the measuring ruler is fixed on a horizontally arranged trowelling plate.
Further, preferably, the specific connection mode of the detachable connection is as follows: the other side of the left semicircular shell is hinged with a hinge rod, and the hinge rod is fixedly connected with a fixing bolt; the other side of the right semicircular shell is provided with a bayonet; the articulated rod rotates together with the fixing bolt and is clamped in the bayonet.
Further, it is preferable that the diameter of the fixing bolt screw is larger than that of the hinge rod.
Further, preferably, the side of the hinge rod, which is close to the fixing bolt, is provided with external threads, and one end, far away from the head, of the fixing bolt is provided with a screw hole matched with the external threads of the hinge rod; the articulated rod is connected with the fixing bolt through external threads and screw holes.
Further, it is preferable that one side of the left semicircular case is connected with one side of the right semicircular case through two hinges, and the two hinges are arranged symmetrically up and down.
Further, preferably, 4 leveling bolts are arranged around the rectangular base and are respectively arranged at four corners of the rectangular base.
Further, it is preferable that the inner diameter of the cylindrical mold is 101.6mm and the height is 160mm.
Further, it is preferable that the scale of the measuring scale is 0mm to 160mm from top to bottom.
The invention also provides a test method for testing the bonding performance between concrete layers, which adopts the test forming die for testing the bonding performance between concrete layers and comprises the following steps:
opening a cylindrical mold, smearing mold release oil on the inner wall of the cylindrical mold and the rectangular base, fully closing the cylindrical mold, clamping the cylindrical mold into a fixing clamping groove of the rectangular base for fixing, and leveling by a leveling bolt to keep the whole mold horizontal;
adding a lower layer concrete material into a cylindrical die, measuring the height of a lower layer concrete test piece by a measuring ruler with a trowelling plate until the height reaches the test requirement height, and trowelling the surface of the lower layer concrete test piece by the trowelling plate;
then adding an interlayer binder, controlling the thickness of the interlayer binder through a measuring ruler, and trowelling the surface of the interlayer binder by a trowelling plate when the thickness of the interlayer binder reaches the design thickness of the test;
then adding an upper layer concrete structure material, controlling the height of the upper layer concrete structure through a measuring ruler, and then adopting a trowelling plate to carry out surface trowelling treatment to prepare a test piece;
placing the whole test piece together with the mold at the temperature and humidity required by the test, standing for more than 12 hours, taking out the cylindrical mold from the fixed clamping groove, opening the cylindrical mold, taking out the test piece, placing the test piece into a standard curing room for conventional curing, and waiting for the test.
Further, it is preferable that the temperature and humidity conditions required for the test are specifically: the temperature is 20+/-5 ℃ and the relative humidity is more than 50 percent.
Compared with the prior art, the invention has the beneficial effects that:
At present, no perfect test equipment is provided for testing the performance of the bonding material between pavement concrete layers in an indoor test, and the bonding material between layers is coated after the concrete structure layers are independently prepared and maintained, so that the influence of the mutual permeation between the bonding material between layers and the concrete structure layers in the preparation and maintenance processes is ignored, and the coating amount and thickness of the bonding material cannot be accurately controlled. Meanwhile, the sizes of the prepared test pieces are not uniform, and the test pieces are required to be cut when being tested, so that disturbance on interlayer binders is avoided. The invention provides a suitable test piece forming die for measuring the interlayer bonding performance of concrete, precisely controls the dosage and thickness of bonding materials, is convenient for fixing and disassembling the test piece, avoids disturbance of interlayer bonding capacity due to manpower to the maximum extent, and can accurately reflect the bonding capacity between pavement materials, thereby providing effective reference data for engineering.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of a forming die for testing bonding performance between concrete layers;
FIG. 2is a front view of the screed and measuring scale;
in the figure, 1 cylindrical mould, 2 are rectangular base, 3 are articulated pole, 4 are fixed draw-in groove, 5 are leveling bolt, 6 are fixing bolt, 7 are dipperstick, 8 are the screed, 9 are left semicircle casing, 10 are right semicircle casing, 11 are bayonet socket.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the present invention and should not be construed as limiting the scope of the invention. The specific techniques or conditions are not identified in the examples and are performed according to techniques or conditions described in the literature in this field or according to the product specifications. The materials or equipment used are conventional products available from commercial sources, not identified to the manufacturer.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. The orientation or state relationship indicated by the terms "inner", "upper", "lower", etc. are orientation or state relationship based on the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "provided" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention is understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in fig. 1-2, a concrete layer bonding performance test forming die comprises a cylindrical die 1, a rectangular base 2, a measuring ruler 7 and a trowelling plate 8;
the rectangular base 2 is provided with a fixed clamping groove 4, and the bottom end of the cylindrical die 1 is clamped in the fixed clamping groove 4;
A plurality of leveling bolts 5 are arranged around the rectangular base 2; preferably 4, are provided at the four corners of the rectangular base 2. The dimensions of the rectangular base 2 are preferably 150mm by 150mm;
The cylindrical die 1 comprises a left semicircular shell 9 and a right semicircular shell 10, and one side of the left semicircular shell 9 is hinged with one side of the right semicircular shell 10; when hinged, the two hinges can be connected through two hinges, and the two hinges are arranged symmetrically up and down, but the hinge is not limited to the hinge.
The other side of the left semicircular shell 9 is detachably connected with the other side of the right semicircular shell 10; preferably, the specific connection mode of the detachable connection is as follows: the other side of the left semicircular shell 9 is hinged with a hinge rod 3, and the hinge rod 3 is fixedly connected with a fixing bolt 6; the other side of the right semicircular shell 10 is provided with a bayonet 11; the hinging rod 3 rotates together with the fixing bolt 6 and is clamped in the bayonet 11.
The diameter of the screw rod of the fixed bolt 6 is larger than that of the hinging rod 3. When the hinging rod 3 rotates together with the fixing bolt 6 and is clamped in the bayonet 11, the step formed by the hinging rod 3 and the fixing bolt 6 is clamped on the right side of the bayonet 11, so that the mold is tightly closed.
Preferably, the side of the hinging rod 3 close to the fixing bolt 6 is provided with external threads, and one end of the fixing bolt 6 far away from the head is provided with a screw hole matched with the external threads of the hinging rod 3; the hinging rod 3 is connected with the fixing bolt 6 through external threads and screw holes. When the hinging rod 3 rotates together with the fixing bolt 6 and is clamped in the bayonet 11, the step formed by the hinging rod 3 and the fixing bolt 6 is clamped on the right side of the bayonet 11, and the fixing bolt 6 can be screwed tightly, so that the right semicircular shell 10 and the left semicircular shell 9 where the bayonet 11 is positioned are pushed to be more tightly closed, and the slurry leakage phenomenon in a forming test is prevented.
The measuring ruler 7 is vertically arranged, and the bottom end of the measuring ruler is fixed on a horizontally arranged trowelling plate 8.
The material of each component of the invention is preferably steel, the dimension of the cylinder mould is 101.6mm in inner diameter, and the height is 160mm.
The cylindrical mold 1 is used for molding a test piece.
The rectangular base 2 is used for supporting the whole test die and fixing the cylindrical die, and keeps the test piece from moving in the test process.
The hinge rod 3 can be used to open and close the cylindrical mold and fix and detach the sample.
And the fixing clamping groove 4 is used for connecting the cylindrical die with the rectangular base, keeping the test piece fixed in the test process, and the width of the bayonet is the same as the wall thickness of the cylindrical die at the upper part, and the inner diameter of the bayonet is 101.6mm.
Leveling bolts 5 are fixed at four corners of the lower rectangular bottom, and can be used for adjusting the height, so that the whole die is kept horizontal, and the flatness of a formed test piece is ensured.
The fixing bolt 6 and the bayonet 11 are used for fixing the die, so that the die can be tightly closed, and the slurry leakage phenomenon in the molding test can be prevented.
The height of the test piece can be directly read out by the measuring ruler 7, and the scale of the measuring ruler is 0mm to 160mm from top to bottom.
The trowelling plate 8 can be used for trowelling materials such as cement concrete and the like on the upper layer of the test piece, so that the surface of the whole test piece is kept flat.
The invention relates to a test method for testing the bonding performance between concrete layers, which comprises the following specific embodiments:
Opening a cylindrical mold 1, smearing mold release oil on the inner wall of the cylindrical mold 1 and a rectangular base 2, then enabling the cylindrical mold 1 to be completely closed through a hinging rod 3, a fixing bolt 6 and a bayonet 11, then clamping the cylindrical mold 1 into a fixing clamping groove 4 of the rectangular base 2 for fixing, and leveling through a leveling bolt 5, so that the whole mold is kept horizontal;
adding a lower layer concrete material into the cylindrical die 1, measuring the height of a lower layer concrete test piece through a measuring ruler 7 with a trowelling plate 8 until the height reaches the test requirement height, and trowelling the surface of the lower layer concrete test piece through the trowelling plate;
then adding an interlayer binder, controlling the thickness of the interlayer binder through a measuring ruler 7, and trowelling the surface of the interlayer binder by a trowelling plate 8 when the thickness reaches the design thickness of the test; the reading of the measuring ruler 7 is the thickness of the lower layer concrete structure and the interlayer binder;
Then adding an upper layer concrete structure material, controlling the height of the upper layer concrete structure through a measuring ruler 7, and then adopting a trowelling plate 8 to carry out surface trowelling treatment to complete the whole injection molding process, so as to prepare a test piece; the reading of the measuring ruler 7 is the height of the whole test piece of the lower concrete structure, the interlayer binder and the upper concrete structure; the upper layer concrete structure and the lower layer concrete structure are generally required to reach the same height;
The whole test piece is placed under the temperature and humidity conditions required by the test (the temperature is 20+/-5 ℃ under the normal condition, and the relative humidity is greater than 50%) together with the mold, and is kept stand for a certain period of time, wherein the period of time is generally more than 12 hours, then the cylindrical mold 1 is taken out from the fixed clamping groove 4, the cylindrical mold 1 is opened lightly through the hinge rod 3, the fixed bolt 6 and the bayonet 11, the test piece is taken out, and the test piece is placed into a standard curing room for routine curing, and is used for the test.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The test method for the inter-concrete layer bonding performance is characterized by adopting a concrete layer bonding performance test forming die, wherein the concrete layer bonding performance test forming die comprises a cylindrical die (1), a rectangular base (2), a measuring ruler (7) and a trowelling plate (8);
a fixed clamping groove (4) is formed in the rectangular base (2), and the bottom end of the cylindrical die (1) is clamped in the fixed clamping groove (4);
A plurality of leveling bolts (5) are arranged around the rectangular base (2);
The cylindrical die (1) comprises a left semicircular shell (9) and a right semicircular shell (10), and one side of the left semicircular shell (9) is hinged with one side of the right semicircular shell (10); the other side of the left semicircular shell (9) is detachably connected with the other side of the right semicircular shell (10);
the measuring ruler (7) is vertically arranged, and the bottom end of the measuring ruler is fixed on a horizontally arranged trowelling plate (8);
the test method for testing the bonding performance between concrete layers comprises the following steps:
opening a cylindrical mold, smearing mold release oil on the inner wall of the cylindrical mold and the rectangular base, fully closing the cylindrical mold, clamping the cylindrical mold into a fixing clamping groove of the rectangular base for fixing, and leveling by a leveling bolt to keep the whole mold horizontal;
adding a lower layer concrete material into a cylindrical die, measuring the height of a lower layer concrete test piece by a measuring ruler with a trowelling plate until the height reaches the test requirement height, and trowelling the surface of the lower layer concrete test piece by the trowelling plate;
then adding an interlayer binder, controlling the thickness of the interlayer binder through a measuring ruler, and trowelling the surface of the interlayer binder by a trowelling plate when the thickness of the interlayer binder reaches the design thickness of the test;
then adding an upper layer concrete structure material, controlling the height of the upper layer concrete structure through a measuring ruler, and then adopting a trowelling plate to carry out surface trowelling treatment to prepare a test piece;
Placing the whole test piece together with the mold under the temperature and humidity conditions required by the test, standing for more than 12 hours, taking out the cylindrical mold from the fixed clamping groove, opening the cylindrical mold, taking out the test piece, and placing the test piece into a standard curing room for conventional curing until the test piece is used;
The specific connection mode of the detachable connection is as follows: the other side of the left semicircular shell (9) is hinged with a hinging rod (3), and the hinging rod (3) is fixedly connected with a fixing bolt (6); the other side of the right semicircular shell (10) is provided with a bayonet (11); the hinging rod (3) rotates together with the fixing bolt (6) and is clamped in the bayonet (11);
the inner diameter of the cylindrical die (1) is 101.6mm, and the height is 160mm;
The temperature and humidity conditions required for the test are specifically: the temperature is 20+/-5 ℃ and the relative humidity is more than 50 percent.
2. The test method for testing the interlayer bonding performance of the concrete according to claim 1, wherein the diameter of the screw of the fixing bolt (6) is larger than that of the hinging rod (3).
3. The test method for testing the interlayer bonding performance of the concrete according to claim 1, wherein the side of the hinging rod (3) close to the fixing bolt (6) is provided with external threads, and one end of the fixing bolt (6) far away from the head is provided with a screw hole matched with the external threads of the hinging rod (3); the hinging rod (3) is connected with the fixing bolt (6) through external threads and screw holes.
4. The test method for testing the bonding performance between concrete layers according to claim 1, wherein one side of the left semicircular shell (9) and one side of the right semicircular shell (10) are connected through two hinges, and the two hinges are arranged symmetrically up and down.
5. The test method for testing the interlayer bonding performance of the concrete according to claim 1, wherein 4 leveling bolts (5) are arranged around the rectangular base (2) and are respectively arranged at four corners of the rectangular base (2).
6. The test method for testing the interlayer bonding performance of the concrete according to claim 1, wherein the scale of the measuring ruler (7) is 0mm to 160mm from top to bottom.
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| CN201810671945.4A CN108444792B (en) | 2018-06-26 | 2018-06-26 | Forming die for testing bonding performance between concrete layers and testing method thereof |
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| CN201810671945.4A CN108444792B (en) | 2018-06-26 | 2018-06-26 | Forming die for testing bonding performance between concrete layers and testing method thereof |
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| CN108760442A (en) * | 2018-08-28 | 2018-11-06 | 云南省交通规划设计研究院有限公司 | A kind of molding die and its test method of adjustable concrete Coating combination thickness |
| CN110421691A (en) * | 2019-08-14 | 2019-11-08 | 安徽省交通控股集团有限公司 | Bonding strength test model preparation method between Cement Concrete Deck Paving Course |
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