CN107560937B - Clamp and method for testing anti-shearing performance of road joint sealing adhesive - Google Patents
Clamp and method for testing anti-shearing performance of road joint sealing adhesive Download PDFInfo
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- CN107560937B CN107560937B CN201711035253.2A CN201711035253A CN107560937B CN 107560937 B CN107560937 B CN 107560937B CN 201711035253 A CN201711035253 A CN 201711035253A CN 107560937 B CN107560937 B CN 107560937B
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Abstract
The invention provides a clamp and a method for testing the anti-shearing performance of a road joint sealant, belongs to the technical field of traffic roads, and particularly relates to a clamp and a method for testing the anti-shearing performance of a road joint sealant. The test fixture comprises a clamping and stretching assembly and a forming assembly; the test method comprises the following specific processes: firstly, manufacturing a plurality of asphalt concrete test blocks; step two, manufacturing a plurality of test pieces; shearing a plurality of groups of test pieces to obtain a shearing displacement curve of the crack pouring glue; step four, calculating failure strain epsilon and failure shear stress tau; and step five, evaluating the shear resistance of the crack pouring adhesive according to the failure strain epsilon and the failure shear stress tau. The invention solves the problem that the prior art can not effectively evaluate the shearing resistance of the road joint sealant, so that the road maintenance department has defects in analyzing the failure mechanism of the joint sealant. The invention can be used for testing the performance of the crack pouring sealant.
Description
Technical Field
The invention belongs to the technical field of traffic roads, and particularly relates to a clamp and a method for testing the anti-shearing performance of a road crack pouring adhesive.
Background
Cracks are the most common pavement diseases, the current method for treating pavement crack diseases is usually crack pouring, and the road crack pouring glue is widely applied by maintenance departments as a common crack pouring material. The road joint sealing glue has good low-temperature deformation capability, the method for testing the low-temperature deformation performance of the road joint sealing glue is mainly a tensile test, and the invention patent with the patent number of 201310133624.6 provides a loading device for testing the low-temperature performance of the joint sealing material through the document retrieval before. However, the road joint sealing glue is subjected to the comprehensive shearing action of temperature stress and wheel load in the service process, the road joint sealing glue is made of a modified asphalt high-molecular polymer material, most of the road joint sealing glue is a mixture of asphalt, rubber and other modifiers, the shearing resistance and tensile strength of the material are obviously different, the traditional tensile test cannot effectively evaluate the shearing resistance of the road joint sealing glue, and the defect exists in the road maintenance department when the failure mechanism of the joint sealing glue is analyzed. Therefore, it is necessary to develop a shearing fixture for road joint sealing glue and to provide a new method for testing the shearing resistance of road joint sealing glue based on the shearing fixture.
Disclosure of Invention
The invention provides a clamp and a method for testing the shearing resistance of a road joint sealant, aiming at solving the problem that the shearing resistance of the road joint sealant cannot be effectively evaluated in the prior art, so that the road maintenance department is insufficient in analyzing the failure mechanism of the joint sealant.
The invention relates to a test fixture for the anti-shearing performance of road joint sealing glue, which comprises a clamping and stretching assembly and a forming assembly;
the clamping and stretching assembly comprises two oppositely arranged clamping arms, and each clamping arm comprises a bottom plate and a side plate vertically and fixedly arranged on the bottom plate; the inner side of one bottom plate is provided with a limiting groove, the inner side of the other bottom plate is provided with a limiting bulge, and the limiting groove is matched with the limiting bulge; the side plate extends inwards to form a sample groove;
the forming assembly comprises a cushion block and two limiting blocks, the two limiting blocks are symmetrically arranged on the cushion block, and the inner side surfaces of the two limiting blocks and the cushion block form a rectangular hole groove; the width of the cushion block is equal to that of the two limiting blocks;
the height of the sample groove is equal to the sum of the height of the rectangular hole groove and the height of the two times of the cushion block, and the distance between the two side surfaces of the sample groove is larger than the distance between the two side surfaces of the rectangular hole groove;
when the clamping and stretching assembly is folded, namely the limiting groove is sleeved with the limiting protrusion, the two sample grooves are aligned, and the distance between the two sample grooves is equal to the width of the cushion block.
The invention relates to a method for testing the shearing resistance of a road joint sealing adhesive, which is realized by the following technical scheme:
step one, manufacturing a plurality of asphalt concrete test blocks: selecting asphalt concrete blocks according to the material gradation of the surface layer in the actual pavement structure, and cutting the selected asphalt concrete blocks into asphalt concrete test blocks with the same size as the sample grooves by using a cutting machine;
secondly, manufacturing a plurality of test pieces consisting of asphalt concrete test pieces and joint filling rubber pieces;
shearing a plurality of groups of test pieces to obtain a shearing displacement curve of the crack pouring glue;
the concrete process of the test piece shearing is as follows:
step three, mounting a clamping stretching assembly in a loading device for testing the low-temperature performance of the crack pouring material, and sleeving the limiting protrusion body with the limiting groove;
step two, mounting the prepared test piece in a sample groove;
step three, keeping the temperature at the specified test temperature for more than or equal to 4 hours;
step four, connecting a loading device, and setting a loading rate and a loading range;
step three, shearing the test piece to obtain a shearing displacement curve of the crack pouring glue;
step four, calculating failure strain epsilon and failure shear stress tau;
and step five, evaluating the shear resistance of the crack pouring adhesive according to the failure strain epsilon and the failure shear stress tau.
The most prominent characteristics and remarkable beneficial effects of the invention are as follows:
by adopting the shear resistance test of the invention to respectively carry out three types of crack pouring adhesives at the temperature of-15 ℃ and the loading rate of 100mm/h, the invention has the following advantages:
(1) the shearing resistance of the road joint sealing adhesive is measured by using the shearing resistance test fixture and the test method for the road joint sealing adhesive, and the aim of obtaining a shearing displacement curve on a shearing failure interface by using a loading device is fulfilled by modifying the existing equipment;
(2) the testing method is simple and easy to understand, and the clamping stretching assembly and the forming assembly can be repeatedly used for 100 ten thousand times;
(3) the length size of the test piece can be changed by adjusting the distance of the forming assembly limiting block;
(4) the test piece simulates the service environment (actual pavement structure environment) of the crack pouring adhesive, and is scientific and reasonable, and the shearing resistance of 99% of the crack pouring adhesive in an actual engineering road can be evaluated by the method.
Drawings
FIG. 1 is a schematic diagram of a clamping and tensioning assembly according to the present invention;
FIG. 2 is a schematic structural view of the molding assembly of the present invention;
FIG. 3 is a schematic illustration of the formation of a sample according to the present invention;
FIG. 4 is a schematic view of a test piece according to the present invention;
FIG. 5 is a schematic view of the clamping and tensioning assembly and test piece assembly and loading of the present invention;
FIG. 6 is a graph of the failure strain versus failure shear stress for test pieces in an example of the present invention;
FIG. 7 is a schematic view of a loading device according to the present invention;
the device comprises a clamping and stretching assembly 21, a forming assembly 22, an asphalt concrete test block 23, a test piece 24, a crack pouring adhesive 25, a sample groove 21-1, a limiting protrusion 21-2, a limiting groove 21-3, a bottom plate 21-4, a side plate 21-5, a cushion block 22-1, a limiting block 22-2 and a rectangular hole groove 22-3.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 and fig. 2, and the fixture for testing the shearing resistance of the road joint sealing compound provided by the embodiment comprises a clamping stretching assembly 21 and a forming assembly 22;
as shown in fig. 1, the clamping and stretching assembly 21 includes two opposite clamping arms, each of which includes a bottom plate 21-4 and a side plate 21-5 vertically fixed on the bottom plate; the inner side of one bottom plate 21-4 is provided with a limiting groove 21-3, the inner side of the other bottom plate is provided with a limiting bulge 21-2, and the limiting groove 21-3 is matched with the limiting bulge 21-2; the side plate 21-5 extends inwards to form a rectangular sample groove 21-1; the inner side here refers to the side opposite the two clamping arms.
As shown in fig. 2, the molding assembly 22 includes a cushion block 22-1 and two limit blocks 22-2, the two limit blocks 22-2 are symmetrically disposed on the cushion block 22-1, and the inner side surfaces of the two limit blocks 22-2 and the cushion block 22-1 form a rectangular hole groove 22-3; the width of the cushion block 22-1 is equal to that of the two limiting blocks 22-2;
the height of the sample groove 21-1 is equal to the sum of the height of the rectangular hole groove 22-3 and the height (thickness) of twice the cushion block 22-1, and the distance between the two side surfaces of the sample groove 21-1 is larger than the distance between the two side surfaces of the rectangular hole groove 22-3; thus, the contact surface of the joint filling rubber block 25 in the middle of the test piece 24 manufactured by the molding assembly 22 and the asphalt concrete test block 23 is positioned in the middle of the side surface of the asphalt concrete test block 23, and the upper surface and the lower surface of the joint filling rubber block 25 are both retracted inwards by a distance equivalent to the thickness of the cushion block 22-1 compared with the asphalt concrete test block 23;
when the clamping and stretching assembly 21 is folded, namely the limiting groove 21-3 is sleeved with the limiting protrusion 21-2, the two sample grooves 21-1 are aligned, and the distance between the two sample grooves 21-1 is equal to the width of the cushion block 22-1.
The second embodiment is as follows: the difference between the present embodiment and the first embodiment is that the width of the cushion block 22-1 and the width of the two limit blocks 22-2 are both 12 mm.
Other steps and parameters are the same as those in the first embodiment.
The third concrete implementation mode: the difference between this embodiment and the second embodiment is that when the clamping and stretching assembly 21 is folded and the limiting groove 21-3 is sleeved with the limiting protrusion 21-2, a gap is left between the two sample grooves 21-1, and the distance between the two sample grooves 21-1 is 12 mm.
Other steps and parameters are the same as those in the second embodiment.
The fourth concrete implementation mode: the present embodiment is different from the second embodiment in that the height of the pad 22-1 is preferably 3 to 7 mm.
The fifth concrete implementation mode: the difference between the second embodiment and the second embodiment is that the height of the rectangular hole groove 22-3 formed by the inner side surfaces of the two limit blocks 22-2 and the cushion block 22-1 is 20 mm.
Other steps and parameters are the same as those in the second embodiment.
The sixth specific implementation mode: in this embodiment, unlike the first embodiment, the material of the clamping tensile component 21 is preferably a rigid material with relatively high stiffness.
Other steps and parameters are the same as those in the first embodiment.
The seventh embodiment: the embodiment is described with reference to fig. 2, fig. 3, fig. 4, fig. 5, and fig. 7, and the method for testing the shear resistance of the road joint sealant provided by the embodiment specifically includes the following steps:
step one, manufacturing a plurality of asphalt concrete test blocks 23: selecting asphalt concrete blocks according to the material gradation of the surface layer in the actual pavement structure, and cutting the selected asphalt concrete blocks into asphalt concrete test blocks 23 with the same size as the sample groove 21-1 by using a cutting machine;
step two, as shown in fig. 3, manufacturing a test piece 24 consisting of a plurality of asphalt concrete test blocks 23 and joint sealing rubber blocks 25, as shown in fig. 4, wherein the structure of the test piece 24 is schematically shown;
step three, as shown in fig. 5, shearing a plurality of groups of test pieces 24 to obtain a shearing displacement curve of the crack pouring glue;
the specific procedure for shearing the test piece 24 is as follows:
step three, installing a clamping stretching assembly 21 in a loading device for testing the low-temperature performance of the crack pouring material, and sleeving the limiting protrusion body 21-2 and the limiting groove 21-3; in the embodiment, the loading device for testing the low-temperature performance of the crack pouring material is provided by the invention patent with the patent number of 201310133624.6, and as shown in fig. 7, the loading device comprises an oil groove 1, a bearing plate, a transmission unit, a supporting sliding unit and a loading unit;
the transmission unit comprises a motor 3, a speed reducer 4, a first bevel gear 5, a second bevel gear 6, a transmission shaft 7, a fixed frame 8 and a transmission piece 9;
the supporting sliding unit comprises a sliding rail 10, a sliding plate 11, a connecting assembly 12 and a transition plate 13;
the loading unit comprises a pressure sensor 16, a movable loading platform 14, a fixed loading platform 19 and two sets of fixtures 15;
the fixed frame 8 is arranged on a bearing plate 2 arranged on the bottom end face of the oil tank 1, a slide rail 10 is arranged on the bearing plate 2, a slide plate 11 is arranged on the slide rail 10, the slide plate 11 can slide on the slide rail 10, a movable loading platform 14 is used for installing one end of a test piece 18, and a fixed loading platform 19 is used for installing the other end of the test piece 18;
the fixed loading platform 19 is connected with the fixed frame 8, the movable loading platform 14 is connected with the sliding plate 11 through the connecting assembly 12, a set of clamps 15 are respectively installed on the fixed loading platform 19 and the movable loading platform 14, the two sets of clamps 15 are arranged oppositely, each set of clamps 15 comprises a movable plate 15-1, a fixed plate 15-2, a wrench 15-3, a column body 15-4, four spiral springs 15-5 and four jacking columns 15-6, the movable plate 15-1 and the fixed plate 15-2 in each set of clamps 15 are arranged in parallel, four jacking columns 15-6 penetrate between the movable plate 15-1 and the fixed plate 15-2, the four jacking columns 15-6 are fixedly connected with the movable plate 15-1, the four jacking columns 15-6 can slide on the fixed plate 15-2, one end of each jacking column 15-6, which is adjacent to a test piece on the movable loading platform 14, is provided with a bulge 15-7, a bulge 15-7 is arranged at one end of each top column 15-6 adjacent to a test piece on the fixed loading platform 19, a spiral spring 15-5 is sleeved on the top column 15-6 between the bulge 15-7 and the fixed plate 15-2, one end of a wrench 15-3 is rotatably connected with a movable loading platform 14 connected with the sliding plate 11, a cylinder 15-4 connected with the wrench 15-3 is arranged between the fixed plate 15-2 and the movable plate 15-1, the cylinder 15-4 can be driven to rotate by the rotation of the wrench 15-3, and the movable plate 15-1 can be driven to horizontally reciprocate by the rotation of the cylinder 15-4;
the output shaft of motor 3 sets up vertically, the output of motor 3 is connected with the input of speed reducer 4, first bevel gear 5 is installed to the output of speed reducer 4, second bevel gear 6 is installed on transmission shaft 7, first bevel gear 5 meshes with second bevel gear 6, transmission shaft 7 is connected with mount 8 rotation, the one end of transmission shaft 7 has the screw thread, transmission member 9 is installed at the one end of transmission shaft 7 and two threaded connection, pressure sensor 16 is installed to the tip of transmission member 9, be connected with one on the lower terminal surface of the removal loading platform 14 that is located between pressure sensor 16 and coupling assembling 12 and cross cab apron 13, the sensing end of pressure sensor 16 points to crossing cab apron 13.
Step two, mounting the prepared test piece 24 in the sample groove 21-1 to enable the asphalt concrete test block 23 to be matched with the sample groove 21-1;
step three, keeping the temperature at the specified test temperature for more than or equal to 4 hours;
step four, connecting a loading device, and setting a loading rate and a loading range;
step three, shearing the test piece 24 to obtain a shearing displacement curve of the crack pouring glue; the loading device applies reverse force to the two bottom plates 21-4 to force the two clamping arms of the clamping and stretching assembly 21 to separate, so that the joint sealing rubber block 25 of the test piece 24 is sheared and damaged;
step four, calculating failure strain epsilon and failure shear stress tau;
and step five, evaluating the shear resistance of the crack pouring adhesive according to the failure strain epsilon and the failure shear stress tau:
the failure strain and the failure shear stress of a plurality of groups of test pieces 24 can be obtained, an average value is obtained, then the anti-shear performance of the crack pouring adhesive is evaluated according to the failure strain epsilon and the failure shear stress tau, or a failure strain and failure shear stress curve graph is obtained according to the failure strain epsilon and the failure shear stress tau, and the anti-shear performance of the crack pouring adhesive is evaluated.
The specific implementation mode is eight: the seventh embodiment is different from the seventh embodiment in that the specific process of manufacturing the test piece composed of the asphalt concrete test block 23 and the joint sealant block 25 in the second step is as follows:
secondly, as shown in figure 2, uniformly brushing an isolating agent in the rectangular hole groove 22-3, symmetrically placing two asphalt concrete test blocks 23 manufactured in the first step on two sides of the rectangular hole groove 22-3, contacting the two asphalt concrete test blocks with the limiting blocks 22-2, and adjusting the distance between the limiting blocks 22-2 to ensure that the distance between the two side surfaces of the rectangular hole groove 22-3 is less than the length of the asphalt concrete test block 23; after the distance between the limiting blocks 22-2 is adjusted, the bottom surfaces of the rectangular hole grooves 22-3 can be brushed with the separant.
Step two, pouring the seam filling glue heated to be in a flowing state into the rectangular hole groove 22-3 slowly until the rectangular space surrounded by the asphalt concrete test block 23 and the forming assembly 22 is filled, pouring is carried out slowly to prevent bubbles from generating, the liquid level of the seam filling glue is slightly higher than the opening surface of the rectangular hole groove 22-3, then cooling is carried out at the temperature of 20-25 ℃ for more than or equal to 2 hours, the seam filling glue is solidified into a seam filling glue block 25, and the seam filling glue block is solidified with the asphalt concrete test block 23;
and step two, scraping the joint sealant with the top surface exceeding the groove opening surface of the rectangular hole groove 22-3 by using a hot scraper, and taking out the two limiting blocks 22-2 and the cushion block 22-1 to obtain a test 24 consisting of the asphalt concrete test block 23 and the joint sealant block 25.
Other steps and parameters are the same as those in the seventh embodiment.
The specific implementation method nine: in this embodiment, different from the eighth embodiment, the method of calculating the failure strain ∈ and the failure shear stress τ in step four includes:
wherein: ε represents the strain to failure; l represents the length of the joint sealing rubber block 25 in the middle of the test piece 24 when the test piece is damaged, and the joint sealing rubber block is read by a data acquisition system of the loading device; l0The original length of the joint compound 25 in the middle of the test piece 24 (i.e., the distance between the two sides of the rectangular hole groove 22-3) is shown; τ represents failure shear stress; f represents the breaking tension which is read by a data acquisition system of the loading device, and A represents the shearing area of the test piece 24, namely the contact area of the joint grouting rubber block 25 and the asphalt concrete test block 23.
Other steps and parameters are the same as those in the ninth embodiment.
The detailed implementation mode is ten: the present embodiment is different from the ninth embodiment in that the number of groups for shearing the test piece 24 in the third step is 3 to 5.
Other steps and parameters are the same as those in the ninth embodiment.
Examples
The following examples were used to demonstrate the beneficial effects of the present invention:
firstly, manufacturing a road joint sealant anti-shearing performance test fixture, which comprises a clamping and stretching assembly 21 and a forming assembly 22; the clamping and stretching assembly 21 adoptsStainless steel, the size of the sample groove 21-1 is 40mm multiplied by 30mm (wherein, the distance between the two side surfaces of the sample groove 21-1 is 40 mm); the width of the cushion block 22-1 is 12mm, the height of the cushion block is 5mm, and the inner side surfaces of the two limiting blocks 22-2 and the cushion block 22-1 form a rectangular hole groove 22-3; the widths of the cushion block 22-1 and the two limiting blocks 22-2 are both 12 mm; the inner side surfaces of the two limit blocks 22-2 and the cushion block 22-1 form a size of l0Rectangular hole groove 22-3 with the diameter of 20mm multiplied by 12 mm.
The specific test process comprises the following steps:
step one, manufacturing 18 asphalt concrete test blocks 23: selecting asphalt concrete blocks according to the material gradation of the surface layer in the actual pavement structure, and cutting the selected asphalt concrete blocks into asphalt concrete test blocks 23 with the same size as the sample groove 21-1 by using a cutting machine;
step two, respectively manufacturing 3 (9 in total) asphalt concrete test blocks 23 and a test piece 24 consisting of a joint filling rubber block 25 by using B joint filling rubber, C joint filling rubber and D joint filling rubber; the concrete method for manufacturing the test piece 24 is as follows:
step two, uniformly brushing an isolating agent in the rectangular hole groove 22-3, symmetrically placing two asphalt concrete test blocks 23 manufactured in the step one on two sides of the rectangular hole groove 22-3, tightly attaching the two asphalt concrete test blocks to the limiting blocks 22-2, and adjusting the distance between the limiting blocks 22-2 to ensure that the length of the rectangular hole groove 22-3 is less than that of the asphalt concrete test block 23;
step two, pouring the heated flowing joint filling glue into the rectangular hole groove 22-3 slowly until the rectangular space enclosed by the asphalt concrete test block 23 and the forming assembly 22 is filled, cooling for 2 hours at the temperature of 20-25 ℃, and solidifying the joint filling glue into a joint filling glue block 25;
and step two and step three, taking out the two limiting blocks 22-2 and the cushion block 22-1 to obtain a test piece 24 consisting of the asphalt concrete test block 23 and the joint sealant block 25.
Thirdly, shearing 3 groups of test pieces 24 on the B crack pouring glue, the C crack pouring glue and the D crack pouring glue respectively to obtain a shearing displacement curve of the crack pouring glue;
the specific procedure for shearing the test piece 24 is as follows:
step three, mounting a clamping stretching assembly 21 in a loading device, and enabling the limiting protrusion body 21-2 to be sleeved with the limiting groove 21-3;
step two, mounting the prepared test piece 24 in the sample groove 21-1;
step three, preserving the heat for 4 hours at the temperature of minus 15 ℃;
step four, connecting a loading device, setting the loading rate to be 100mm/h and the loading range;
step three, shearing the test piece 24 to obtain a shearing displacement curve of the crack pouring glue;
step four, calculating failure strain epsilon and failure shear stress tau:
and step five, respectively acquiring the failure strain and the failure shear stress of the 3 groups of test pieces 24 by each crack pouring adhesive, and averaging to finally obtain a failure strain and failure shear stress curve diagram shown in fig. 6 for evaluating the shear resistance of the crack pouring adhesive, and obtaining the conclusion that the C crack pouring adhesive is superior to the D crack pouring adhesive and the D crack pouring adhesive is superior to the B crack pouring adhesive.
The present invention is capable of other embodiments and its several details are capable of modifications in various obvious respects, all without departing from the spirit and scope of the present invention.
Claims (3)
1. The clamp for testing the shearing resistance of the road joint sealing glue is characterized by comprising a clamping and stretching assembly (21) and a forming assembly (22);
the clamping and stretching assembly (21) comprises two oppositely arranged clamping arms, and each clamping arm comprises a bottom plate (21-4) and a side plate (21-5) vertically and fixedly arranged on the bottom plate; the inner side of one bottom plate (21-4) is provided with a limiting groove (21-3), the inner side of the other bottom plate is provided with a limiting bulge (21-2), and the limiting groove (21-3) is matched with the limiting bulge (21-2); the side plate (21-5) extends inwards to form a sample groove (21-1);
the forming assembly (22) comprises a cushion block (22-1) and two limiting blocks (22-2), the two limiting blocks (22-2) are symmetrically arranged on the cushion block (22-1), and the inner side surfaces of the two limiting blocks (22-2) and the cushion block (22-1) form a rectangular hole groove (22-3); the width of the cushion block (22-1) is equal to that of the two limiting blocks (22-2);
the height of the sample groove (21-1) is equal to the sum of the height of the rectangular hole groove (22-3) and the height of the double cushion blocks (22-1), and the distance between the two side surfaces of the sample groove (21-1) is greater than the distance between the two side surfaces of the rectangular hole groove (22-3);
when the clamping and stretching assembly (21) is folded, namely the limiting groove (21-3) is sleeved with the limiting protrusion (21-2), the two sample grooves (21-1) are aligned, and the distance between the two sample grooves (21-1) is equal to the width of the cushion block (22-1);
the width of the cushion block (22-1) and the width of the two limiting blocks (22-2) are both 12mm, and when the clamping and stretching assembly (21) is folded, the distance between the two sample grooves (21-1) is 12 mm;
the height of a rectangular hole groove (22-3) formed by the inner side surfaces of the two limiting blocks (22-2) and the cushion block (22-1) is 20 mm.
2. The clamp for testing the shearing resistance of the road joint sealing glue according to claim 1, wherein the height of the cushion block (22-1) is 3-7 mm.
3. The clamp for testing the shearing resistance of the road joint sealing glue according to claim 1, wherein the clamping and stretching assembly (21) is made of a rigid material.
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| CN201711035253.2A CN107560937B (en) | 2017-10-30 | 2017-10-30 | Clamp and method for testing anti-shearing performance of road joint sealing adhesive |
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| CN201711035253.2A CN107560937B (en) | 2017-10-30 | 2017-10-30 | Clamp and method for testing anti-shearing performance of road joint sealing adhesive |
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| CN108844811A (en) * | 2018-06-19 | 2018-11-20 | 哈尔滨工业大学（威海） | A kind of fixture and test method of measurement sandwich type connection test specimen cutting performance |
| CN111175111B (en) * | 2020-03-02 | 2022-02-01 | 湘潭大学 | Clamp for shear test of asphalt concrete contact test piece and test method thereof |
| CN112240852B (en) * | 2020-12-11 | 2021-04-23 | 南京仪汇仪器设备有限公司 | Experimental mold for testing performance of silicone adhesive |
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