CN101871863A - Test piece preparation mould special for shearing test and preparation method thereof - Google Patents
Test piece preparation mould special for shearing test and preparation method thereof Download PDFInfo
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- CN101871863A CN101871863A CN 201010228745 CN201010228745A CN101871863A CN 101871863 A CN101871863 A CN 101871863A CN 201010228745 CN201010228745 CN 201010228745 CN 201010228745 A CN201010228745 A CN 201010228745A CN 101871863 A CN101871863 A CN 101871863A
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Abstract
The invention discloses a test piece preparation mould special for a shearing test and a preparation method thereof, and relates to the technical field of road inter-layer binding performance tests. The invention solves the problems that no special forming mould for preparing a test piece is available and in the conventional method, the uniformity of the structures at the middle base and the surface layer is poor, the strength of the cut base layer of the test piece is reduced and the accuracy of the test result is affected. Two parallel side plates in the mould are connected with the two ends of a supporting bottom plate; two pairs of slots are oppositely formed in the inner walls of the two side plates; split bearing baffles are symmetrically inserted between two bearing baffles through the slots; the method comprises the following steps of: 1, uniformly stirring broken stones, water and cement and pouring the mixture into a mould provided with a second split bearing baffle; 2, controlling the speed of a pressure head so that the distance between the pressure head and the upper end of the second split bearing baffle is 40 mm; 3, coating priming oil on the test piece and then standing for 24 hours; 4, after the priming oil penetrates, arranging a first split bearing baffle, sealing with the broken stone and placing the sealed first split bearing baffle on the test piece for 4 hours; 5, pressing and forming; and 6, demoulding and preserving. The test piece preparation mould is used for a shearing test for measuring the road interlayer binding performance.
Description
Technical field
The present invention relates to bonding properties technical field of measurement and test between path layer, especially a kind of test material preparation mould that is exclusively used in shear test and preparation method thereof.
Background technology
The interlaminar bonding problem of bituminous pavement top and basic unit is the focus of road circle common concern in recent years, in construction process of asphalt pavement, takes to be provided with structural measures such as layer, following seal to strengthen the cementation power between basic unit and surface layer.Studies show that good interlaminar bonding ability can effectively be avoided the generation of road diseases such as interlayer slip, prolonged the serviceable life of road.Shear test is that mensuration and evaluation interlaminar bonding ability are the most directly perceived, effective method, for cementation power between the path layer of Disposal Measures between different path layers provides foundation than choosing, but be not specifically designed to basic unit and surface layer forming mould at present, way commonly used is to use traditional rut test piece mould to solve this type of moulding problem, adopt the deficiency of rut die trial shaping test piece to be: on the one hand, this designs rut for moulding individual layer asphalt, and in simulation moulding basic unit, during the surface layer double-decker, every layer height only is half of rut test piece height, work as surface layer, when the nominal particle diameter that gathers materials in the base mixture is big, because the restriction of die trial height causes the basic unit of institute's moulding and surface layer structure homogeneity relatively poor, lack of homogeneity is very unfavorable for measuring the interlaminar bonding performance; On the other hand, the formed in mould sample dimensions of rut is bigger, after need cutting, can use by test specimen, come off seriously but basic unit's part pellet is loose after cutting, cause foundation base intension to reduce significantly, foundation base intension reduces the variation that will cause the shear failure form, and promptly shear failure is not to appear between basic unit and the surface layer, but come across basic unit self, and then influence the accuracy of test findings.
Summary of the invention
The objective of the invention is in shear test, not to be specifically designed to basic unit and surface layer forming mould in order to solve; In the forming method of traditional rut test piece mould, the restriction of test specimen height causes the basic unit of institute's moulding and surface layer structure homogeneity relatively poor, and the formed in mould sample dimensions of rut is bigger, test specimen basic unit's part pellet after cutting is loose to come off seriously, cause foundation base intension to reduce significantly and cause the problem of accuracy of the variable effect test findings of shear failure form, and then a kind of test material preparation mould that is exclusively used in shear test and preparation method thereof is provided.
Technical scheme of the present invention is: the test material preparation mould that is exclusively used in shear test of the present invention comprises supporting baseplate, two side plates, two first split type pressure-bearing baffle plates and two second split type pressure-bearing baffle plates, on described each side plate, following two ends are respectively equipped with outer convex edge, two side plates that be arranged in parallel are vertically connected on the two ends of supporting baseplate, be oppositely arranged two pairs of vertical slots on the inwall of two side plates, two second split type pressure-bearing baffle plates are symmetrical arranged and are inserted between two side plates by slot, two first split type pressure-bearing baffle plates are inserted in two pairs of slots respectively and are positioned at the top of the second split type pressure-bearing baffle plate, described supporting baseplate, two side plates, two first split type pressure-bearing baffle plates and two second split type pressure-bearing baffle plates constitute chamber.
The test material preparation method that is exclusively used in shear test of the present invention is as follows:
Step 1: at normal temperatures rubble and water are stirred, obtain the potpourri of rubble and cement after fully to wherein adding the cement mix, inject demixing in the specimen molding mould that the second split type pressure-bearing baffle plate is installed and carry out suitably inserting smashing, prepare isostatic compaction;
Step 2: the specimen molding mould that will be loaded with through the potpourri of step 1 places under the pressure head, and the press-in speed of controlling pressure head simultaneously is 1.5kN/s～2.0kN/s, when the distance between the pressure head end face and the second split type pressure-bearing baffle plate upper surface is 40mm, obtain basic unit's test specimen of moulding;
Step 3: will leave standstill 3h～4h through basic unit's test specimen of step 2 aftershaping, and evenly smear priming oil at the upper surface of basic unit's test specimen of moulding then, and make basic unit's test specimen of moulding under normal temperature, leave standstill 24h;
Step 4: after the infiltration of priming oil on basic unit's test specimen to be formed, the first split type pressure-bearing baffle plate is installed on the second split type pressure-bearing baffle plate, seal down is laid on basic unit's test specimen of moulding and is statically placed in 4h under the normal temperature;
Step 5: will be through the test specimen that step 4 the obtains moulding of in the specimen molding mould, exerting pressure;
Step 6: to the test specimen demoulding after the moulding.
The present invention has following beneficial effect: test material preparation mould of the present invention is dismantled when satisfying the moulding needs simply, satisfied the integrality of specimen molding, dismountable split type pressure-bearing baffle design, be convenient to the laying of interlayer Disposal Measures, make the specimen molding size moderate, satisfy the homogeneity of shaping test piece, variability is little, this preparation mould cooperates pressure head, can satisfy different forming methods; The test material preparation method is simple, quick and convenient, and the specimen molding error is little, can guarantee that adhesive surface is of the required size, and mats formation for bituminous pavement and selects suitable binding material or tack coat construction quality that convenient, reasonable and effective method are provided.
Description of drawings
Fig. 1 is the side view of test material preparation mould of the present invention; Fig. 2 is the A-A cut-open view of Fig. 1; Fig. 3 is the B-B cut-open view of Fig. 2; Fig. 4 is the structural representation of split type pressure-bearing baffle plate; Fig. 5 is a structural representation of tiltedly cutting anchor clamps.
Embodiment
Embodiment one: the test material preparation mould that is exclusively used in shear test that present embodiment is described in conjunction with Fig. 1 to Fig. 4, it comprises supporting baseplate 2, two side plates 3, two first split type pressure-bearing baffle plates 8 and two second split type pressure-bearing baffle plates 9, on described each side plate 3, following two ends are respectively equipped with outer convex edge, two side plates 3 that be arranged in parallel are vertically connected on the two ends of supporting baseplate 2, be oppositely arranged two pairs of vertical slots 4 on the inwall of two side plates 3, two second split type pressure-bearing baffle plates 9 are symmetrical arranged and are inserted between two side plates 3 by slot 4, two first split type pressure-bearing baffle plates 8 are inserted in two pairs of slots 4 respectively and are positioned at the top of the second split type pressure-bearing baffle plate 9, described supporting baseplate 2, two side plates 3, two first split type pressure-bearing baffle plates 8 and two second split type pressure-bearing baffle plates 9 constitute chamber 10.
Embodiment two: the test material preparation mould that is exclusively used in shear test that present embodiment is described in conjunction with Fig. 1 to Fig. 3, it also comprises at least four pull bars 6, described at least four pull bars 6 levels also are symmetricly set on the outside of two pairs of slots 4 of two side plates 3, and two side plates 3 connect by pull bar 6.Other compositions of present embodiment are identical with embodiment one with annexation.
Embodiment three: the test material preparation mould that is exclusively used in shear test that present embodiment is described in conjunction with Fig. 1 to Fig. 3, the dead size of described chamber 10 is long L * wide W * high H=150mm * 150mm * 190mm, the height H 1 of the first split type pressure-bearing baffle plate 8 is 75mm, and the height H 2 of the second split type pressure-bearing baffle plate 9 is 115mm.Other compositions of present embodiment are identical with embodiment one or two with annexation.
Embodiment four: the test material preparation mould that is exclusively used in shear test that present embodiment is described in conjunction with Fig. 1 to Fig. 3, it also comprises two laggings 5, described two laggings 5 are individually fixed in the outside of two pairs of slots 4, and lagging 5 contacts with slot 4, and the joint of the center line of lagging 5 and the first split type pressure-bearing baffle plate 8 and the second split type pressure-bearing baffle plate 9 is positioned at same surface level.Other compositions of present embodiment are identical with embodiment one, two or three with annexation.
Embodiment five: in conjunction with Fig. 1 to Fig. 3 the test material preparation mould that is exclusively used in shear test of present embodiment is described, the equal level in the middle part of described two side plates 3 is provided with T type transverse stiffener 3-2.Other compositions of present embodiment are identical with embodiment one, two, three or four with annexation.
Embodiment six: in conjunction with Fig. 1 to Fig. 3 the test material preparation mould that is exclusively used in shear test of present embodiment is described, the top of described two side plates 3 respectively is provided with a handle 3-1.Other compositions of present embodiment are identical with embodiment one, two, three, four or five with annexation.
Embodiment seven: in conjunction with Fig. 1 to Fig. 3 the test material preparation mould that is exclusively used in shear test of present embodiment is described, it also comprises loam cake 7, and described loam cake 7 is arranged on two side plates 3.Other compositions of present embodiment are arbitrary identical with embodiment one to six with annexation.
Embodiment eight: the preparation method of the test specimen that is exclusively used in shear test that present embodiment is described in conjunction with Fig. 1 to Fig. 4 is as follows:
Step 1: at normal temperatures rubble and water are stirred, obtain the potpourri of rubble and cement after fully to wherein adding the cement mix, inject demixing in the specimen molding mould 1 that the second split type pressure-bearing baffle plate 9 is installed and carry out suitably inserting smashing, prepare isostatic compaction;
Step 2: the specimen molding mould 1 that will be loaded with through the potpourri of step 1 places under the pressure head, and the press-in speed of controlling pressure head simultaneously is 1.5kN/s～2.0kN/s, when the distance between pressure head end face and the second split type pressure-bearing baffle plate, 9 upper surfaces is 40mm, obtain basic unit's test specimen of moulding;
Step 3: will leave standstill 3h～4h through basic unit's test specimen of step 2 aftershaping, and evenly smear priming oil at the upper surface of basic unit's test specimen of moulding then, and make basic unit's test specimen of moulding under normal temperature, leave standstill 24h;
Step 4: after the infiltration of priming oil on basic unit's test specimen to be formed, the first split type pressure-bearing baffle plate 8 is installed on the second split type pressure-bearing baffle plate 9, seal down is laid on basic unit's test specimen of moulding and is statically placed in 4h under the normal temperature;
Step 5: will be through the test specimen that step 4 the obtains moulding of in specimen molding mould 1, exerting pressure;
Step 6: to the test specimen demoulding after the moulding, and the standard health-preserving chamber of placing carries out health.
Tiltedly the scissor test principle is exert pressure at the upper testing mould end face of piece fixture (shear test in a certain angle abbreviates oblique scissor test as with level), this pressure decomposes along the angle of shear surface, under vertical force and horizontal force combined action, make test specimen produce inter-laminar shear failure, the truth of shear action between structural sheet when can simulated roadway being subjected to traffic load, as shown in Figure 5, tiltedly cut the seaming chuck 11 of anchor clamps and the bond length of push-down head 12 and be 75mm, the length on long limit is 150mm, to place between seaming chuck 11 and the push-down head 12 through the test specimen that test material preparation mould of the present invention and preparation method prepare, make the basic unit of test specimen be positioned at the angle of push-down head 12, and make test specimen not exceed baffle plate by the fine setting of controllable register 12-1, the spheric seat interface 11-1 of the upper end of seaming chuck 11 is connected with loading system, can be by the normal pressure that loading system applies along become miter angle to produce equal-sized shear stress and normal stress with surface level at shear surface, shear stress makes the test specimen interlayer produce shear failure, and loading system adopts the MTS810 material test system of American MTS SystemsCorporation.
Claims (8)
1. test material preparation mould that is exclusively used in shear test, it is characterized in that: it comprises supporting baseplate (2), two side plates (3), two first split type pressure-bearing baffle plates (8) and two second split type pressure-bearing baffle plates (9), on described each side plate (3), following two ends are respectively equipped with outer convex edge, two side plates (3) that be arranged in parallel are vertically connected on the two ends of supporting baseplate (2), be oppositely arranged two pairs of vertical slots (4) on the inwall of two side plates (3), two second split type pressure-bearing baffle plates (9) are symmetrical arranged and are inserted between two side plates (3) by slot (4), two first split type pressure-bearing baffle plates (8) are inserted in two pairs of slots (4) respectively and are positioned at the top of the second split type pressure-bearing baffle plate (9), described supporting baseplate (2), two side plates (3), two first split type pressure-bearing baffle plates (8) and two second split type pressure-bearing baffle plates (9) constitute chamber (10).
2. the test material preparation mould that is exclusively used in shear test according to claim 1, it is characterized in that: it also comprises at least four pull bars (6), described at least four pull bars (6) level also is symmetricly set on the outside of two pairs of slots (4) of two side plates (3), and two side plates (3) connect by pull bar (6).
3. the test material preparation mould that is exclusively used in shear test according to claim 1 and 2, it is characterized in that: the dead size of described chamber (10) is long (L) * wide (W) * height (H)=150mm * 150mm * 190mm, the height (H1) of the first split type pressure-bearing baffle plate (8) is 75mm, and the height (H2) of the second split type pressure-bearing baffle plate (9) is 115mm.
4. the test material preparation mould that is exclusively used in shear test according to claim 1 and 2, it is characterized in that: it also comprises two laggings (5), described two laggings (5) are individually fixed in the outside of two pairs of slots (4), and lagging (5) contacts with slot (4), and the joint of the center line of lagging (5) and the first split type pressure-bearing baffle plate (8) and the second split type pressure-bearing baffle plate (9) is positioned at same surface level.
5. the test material preparation mould that is exclusively used in shear test according to claim 1 and 2 is characterized in that: the equal level in middle part of described two side plates (3) is provided with T type transverse stiffener (3-2).
6. the test material preparation mould that is exclusively used in shear test according to claim 1 and 2 is characterized in that: the top of described two side plates (3) respectively is provided with a handle (3-1).
7. the test material preparation mould that is exclusively used in shear test according to claim 1 and 2 is characterized in that: it also comprises loam cake (7), and described loam cake (7) is arranged on two side plates (3).
8. use the described test material preparation method that is exclusively used in the test material preparation mould of shear test of claim 1, it is characterized in that the preparation method is as follows:
Step 1: at normal temperatures rubble and water are stirred, obtain the potpourri of rubble and cement after fully to wherein adding the cement mix, inject demixing in the specimen molding mould (1) that the second split type pressure-bearing baffle plate (9) is installed and insert and smash, the preparation isostatic compaction;
Step 2: the specimen molding mould (1) that will be loaded with through the potpourri of step 1 places under the pressure head, and the press-in speed of controlling pressure head simultaneously is 1.5kN/s～2.0kN/s, when the distance between the pressure head end face and second split type pressure-bearing baffle plate (9) upper surface is 40mm, obtain basic unit's test specimen of moulding;
Step 3: according to the test needs, will leave standstill 3h～4h, and evenly smear priming oil at the upper surface of basic unit's test specimen of moulding then, and make basic unit's test specimen of moulding under normal temperature, leave standstill 24h through basic unit's test specimen of step 2 aftershaping;
Step 4: after the infiltration of priming oil on basic unit's test specimen to be formed, the first split type pressure-bearing baffle plate (8) is installed on the second split type pressure-bearing baffle plate (9), seal down is laid on basic unit's test specimen of moulding and is statically placed in 4h under the normal temperature;
Step 5: will be through the test specimen that step 4 the obtains moulding of in specimen molding mould (1), exerting pressure;
Step 6: to the test specimen demoulding after the moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102287455A CN101871863B (en) | 2010-07-16 | 2010-07-16 | Test piece preparation mould special for shearing test and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102287455A CN101871863B (en) | 2010-07-16 | 2010-07-16 | Test piece preparation mould special for shearing test and preparation method thereof |
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| CN101871863A true CN101871863A (en) | 2010-10-27 |
| CN101871863B CN101871863B (en) | 2011-12-21 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241699A (en) * | 2015-09-25 | 2016-01-13 | 哈尔滨工业大学 | Asphalt small-beam specimen preparation mold and asphalt small-beam specimen preparation method |
| CN105606460A (en) * | 2015-12-22 | 2016-05-25 | 中南大学 | Contact surface equal-strain direct shear apparatus and sample preparation method thereof |
| CN106153476A (en) * | 2016-08-09 | 2016-11-23 | 宁波中加低碳新技术研究院有限公司 | Timber rolls modulus of shearing and the method for testing of intensity |
| CN106442951A (en) * | 2016-10-13 | 2017-02-22 | 沈阳建筑大学 | Combined multifunctional track plate device |
| CN108387418A (en) * | 2018-02-07 | 2018-08-10 | 长安大学 | Full-automatic Homogeneity of Asphalt Mixture test equipment and test method |
| CN108444792A (en) * | 2018-06-26 | 2018-08-24 | 云南省交通规划设计研究院 | Binding performance test molding die and its test method between a kind of concrete layer |
| CN113702176A (en) * | 2021-07-15 | 2021-11-26 | 深圳大学 | Bidirectional electromagnetic loading dynamic compression-shear experimental device and test method |
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2010
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Cited By (10)
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| CN105241699A (en) * | 2015-09-25 | 2016-01-13 | 哈尔滨工业大学 | Asphalt small-beam specimen preparation mold and asphalt small-beam specimen preparation method |
| CN105241699B (en) * | 2015-09-25 | 2017-11-03 | 哈尔滨工业大学 | A kind of preparation method of pitch girder test material preparation mould and pitch girder test specimen |
| CN105606460A (en) * | 2015-12-22 | 2016-05-25 | 中南大学 | Contact surface equal-strain direct shear apparatus and sample preparation method thereof |
| CN106153476A (en) * | 2016-08-09 | 2016-11-23 | 宁波中加低碳新技术研究院有限公司 | Timber rolls modulus of shearing and the method for testing of intensity |
| CN106442951A (en) * | 2016-10-13 | 2017-02-22 | 沈阳建筑大学 | Combined multifunctional track plate device |
| CN108387418A (en) * | 2018-02-07 | 2018-08-10 | 长安大学 | Full-automatic Homogeneity of Asphalt Mixture test equipment and test method |
| CN108387418B (en) * | 2018-02-07 | 2024-03-15 | 长安大学 | Full-automatic asphalt mixture uniformity testing instrument and testing method |
| CN108444792A (en) * | 2018-06-26 | 2018-08-24 | 云南省交通规划设计研究院 | Binding performance test molding die and its test method between a kind of concrete layer |
| CN108444792B (en) * | 2018-06-26 | 2024-05-03 | 云南省交通规划设计研究院股份有限公司 | Forming die for testing bonding performance between concrete layers and testing method thereof |
| CN113702176A (en) * | 2021-07-15 | 2021-11-26 | 深圳大学 | Bidirectional electromagnetic loading dynamic compression-shear experimental device and test method |
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| CN101871863B (en) | 2011-12-21 |
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Granted publication date: 20111221 Termination date: 20170716 |