CN109883795B - Asphalt ductility test mold convenient to disassemble and assemble and manufacturing method of sample - Google Patents
Asphalt ductility test mold convenient to disassemble and assemble and manufacturing method of sample Download PDFInfo
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- CN109883795B CN109883795B CN201910291375.0A CN201910291375A CN109883795B CN 109883795 B CN109883795 B CN 109883795B CN 201910291375 A CN201910291375 A CN 201910291375A CN 109883795 B CN109883795 B CN 109883795B
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Abstract
The invention discloses an asphalt ductility test mould with convenient assembly and disassembly, which comprises a first end mould, a second end mould, a first side mould, a second side mould, a bottom plate and a top plate, wherein the first end mould, the second end mould, the first side mould, the second side mould, the bottom plate and the top plate enclose to form an asphalt mould cavity, the first side mould and the top plate are integrally formed, the second side mould and the bottom plate are integrally formed, a locking device is respectively arranged between the first side mould and the first end mould and between the first side mould and the second end mould, a locking device is respectively arranged between the second side mould and the first end mould and between the second side mould and the second end mould, the locking device adopts a dovetail-shaped male buckle and a dovetail groove, the test mould is vertically arranged, asphalt is poured through an asphalt pressure pouring device, and the invention also discloses a method for manufacturing a test sample by using the asphalt ductility test mould with convenient assembly and disassembly, which has the advantages of high test precision, strong integrity, one-step molding and smooth surface, high compactness and the like.
Description
Technical Field
The invention relates to the field of road and bridge engineering, in particular to a method for manufacturing a detachable asphalt ductility test mold and a sample.
Background
Asphalt ductility refers to the ductility of asphalt, and the higher the ductility is, the better the asphalt is shaped. At present, in order to test the ductility of asphalt, a ductility tester and a standard splay test model are mainly used for testing.
When the splayed test mold is filled with asphalt, the upper surface of the redundant asphalt needs to be scraped by a scraper, time, labor and force are wasted, the asphalt test deformation is easily caused in the scraping process, the test precision is influenced, and the smooth and flat upper and lower surfaces are hardly ensured. In order to solve the technical problem, the chinese patent application (cn201610572751. x) discloses a block fixing device for an extension sample, which can ensure that the upper and lower surfaces of a test are smooth to some extent, however, the top plate is provided with three drilling holes, one of which is a grouting hole and two overflow holes, and after the mold is removed, a scraper is still needed to scrape off the asphalt overflowing from the overflow holes, that is, the technical problem that the upper and lower surfaces of the asphalt are smooth is not completely solved. In addition, the two side mold baffles welded on the bottom plate are easy to deform and influence reuse due to slight carelessness (such as collision and compression) in the processes of disassembly, assembly and storage, and the bottom plate, the top plate and the ductility test mold are arranged in a split mode and need additional screws and nuts for fixing, so that the disassembly and assembly are troublesome.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology section, the invention aims to provide an asphalt ductility test mold which is convenient to disassemble and assemble, and the manufactured sample test mold has the technical effects of high test precision, strong integrity, one-step forming, smooth surface, high compactness and the like.
The second purpose of the invention is to provide a method for manufacturing asphalt ductility test samples.
In order to achieve the first purpose of the invention, the following technical scheme is adopted:
an asphalt ductility test mould convenient to disassemble and assemble comprises a first end mould, a second end mould, a first side mould, a second side mould, a bottom plate and a top plate, wherein the first end mould, the second end mould, the first side mould, the second side mould, the bottom plate and the top plate are enclosed to form an asphalt mould cavity; the locking device comprises a male buckle and a female groove, the male buckle is arranged on the side end face of each side die jointed with the end die, the female groove device is arranged on the side end face of each end die jointed with the side die, and the transverse end of the male buckle is in a dovetail shape and is arranged along the thickness direction of the side die; the female slot is a dovetail slot with the size and the shape matched with the male buckle.
Preferably, still be provided with pitch filling hole and pitch overflow hole, the pitch filling hole runs through the second end mould, pitch overflow hole runs through first end mould, the vertical setting is followed to the examination mould, the pitch filling hole is located the least significant end of die cavity, pitch overflow hole is located the topmost of die cavity.
Preferably, the bottom plate adopts the steel sheet, bottom plate inside is provided with first heating device, first heating device is evenly distributed's wave heating wire, roof and first side form adopt toughened glass integrated into one piece.
Preferably, the asphalt pressure filling device comprises an asphalt pressure tank body, an asphalt pressure tank cover, a piston plate, a hydraulic telescopic device, a second heating device and an extrusion opening, wherein the asphalt pressure tank cover is arranged at the top of the asphalt pressure tank body in a sealing manner in an openable manner, the piston plate is matched with the inner wall of the asphalt pressure tank body in a sealing manner, the hydraulic telescopic device is arranged between the bottom of the piston plate and the bottom of the pressure tank body, and the hydraulic telescopic device can drive the piston plate to slide up and down along the inner wall of the asphalt pressure tank body; the second heating device is arranged on the inner wall of the asphalt pressure tank body and the top surface of the piston plate, the extrusion port is arranged in the middle of the asphalt pressure tank cover, and the extrusion port is connected with the asphalt injection hole through a pressure pipe.
Preferably, the cross section of the pitch pressure tank body is circular, the pitch pressure cover is outside cone, the top surface of piston plate is the conical surface with pitch pressure cover looks adaptation, it is located to extrude the mouth the central point of pitch pressure cover puts, the winding has the heating wire on the pressure pipe.
In order to achieve another purpose of the invention, the following technical scheme is adopted:
a method for manufacturing an asphalt ductility test sample comprises the following steps:
(1) providing the asphalt ductility test mold, and uniformly coating an isolating agent on the positions of the first side mold, the second side mold, the bottom plate and the top plate, which correspond to the mold cavity;
(2) horizontally placing the bottom plate with the second side die on a test bed in a mode that the second side die faces upwards, enabling the first end die to be assembled with the dovetail-shaped male buckle on the end face of one side of the second side die from the top end to the bottom end of the second side die in a sliding and inserting mode through the corresponding dovetail groove on the first end die, and enabling the second end die to be assembled with the male buckle on the end face of the other side of the second side die in a sliding and inserting mode from the top end to the bottom end of the second side die through the corresponding dovetail groove on the second end die;
(3) the top plate with the first side die faces towards the first side die, after the male buckles of the first side die are in one-to-one correspondence with the corresponding dovetail grooves of the first end die and the second end die, the male buckles on the end faces of the two sides of the first side die are respectively assembled with the corresponding dovetail grooves of the first end die and the second end die in a sliding and inserting mode along the vertical direction;
(4) fixing the assembled test mold on a test bed in a vertical mode that a first end mold is arranged on the upper part and a second end mold is arranged on the lower part;
(5) communicating an extrusion opening and an asphalt injection hole of the asphalt pressure filling device through a pressure pipe, opening an asphalt pressure tank cover, and injecting test asphalt into the asphalt pressure tank;
(6) switching on the second heating device, closing the asphalt pressure tank cover when asphalt in the asphalt pressure is in a molten state, switching on the first heating device and the electric heating wires on the pressure pipe, and starting the hydraulic stretching device;
(7) molten asphalt is slowly injected into the die cavity through an asphalt injection hole, the asphalt filling state is observed at any time through a transparent top plate, the filling compactness is ensured, and when asphalt overflows from an asphalt overflow hole, the hydraulic telescopic device is closed, and the power supply of electric heating wires on the first heating device, the second heating device and the pressure pipe is cut off;
(8) after the asphalt is initially cooled, removing the pressure pipe, and timely cleaning redundant asphalt in the pressure pipe and the asphalt pressure perfusion device;
(9) and after the asphalt is cooled, removing the side mold with the top plate and the side mold with the bottom plate, placing the sample in a constant-temperature water bath box for maintenance, and waiting for the test.
The invention can achieve the following technical effects:
(1) the first side die and the top plate are ingeniously integrally formed, the second side die and the bottom plate are integrally formed, the top plate with the side dies and the bottom plate with the side dies are formed, the relative positions of the side dies, the top plate and the bottom plate can be accurately controlled, and the test precision is improved; be provided with latch device between first side form, second side form and first end mould and the second end mould, only need can accomplish the equipment of examination mould through the roof of taking the side form and the bottom plate of taking the side form and the latch device joint that corresponds of passing through of two end moulds, saved fixing bolt, easy dismounting.
(2) The locking device adopts the male buckle which is generally arranged along the side die with the dovetail-shaped cross section and the dovetail groove matched with the male buckle on the end die, so that the assembly and disassembly of the test die can be further simplified through simple sliding insertion assembly, in addition, the mushroom head can effectively limit each component of the test die, and the test precision is improved.
(3) The asphalt injection hole and the asphalt overflow hole are both positioned on the end mold, and the end mold needs to be reserved (does not need to be dismounted) during asphalt ductility test, so that the situation that the sample still needs to be scraped at the asphalt injection hole and the asphalt overflow hole after the mold is dismounted is avoided, and therefore, the asphalt sample is formed at one time, and the absolute smoothness of the surface of the sample after the mold is dismounted is ensured. In addition, the vertical setting of examination mould, pitch filling hole are located the bottom of die cavity, and pitch overflow hole is located the die cavity top, changes traditional pitch filling mode, adopts the method of returning the notes from bottom to top, can effectively guarantee the closely knit degree that pitch was filled.
(4) The first heating device is additionally arranged in the bottom plate, so that the asphalt injected into the mold cavity can be prevented from being hardened too fast, the heating flowing state is always kept, the method for injecting the asphalt from bottom to top is easier to implement, in addition, the asphalt can flow to the whole mold cavity, and the problems of bubbles, unfilled corners and the like in the formed test mold are prevented.
(5) The invention skillfully arranges the asphalt pressure filling device, the second heating device in the asphalt pressure filling device can realize the rapid heating and melting of asphalt, the asphalt is pressurized and filled in a manner similar to toothpaste squeezing through the hydraulic telescopic device and the piston plate, the smooth implementation of back filling from bottom to top is utilized, simultaneously, the compactness of the sample is further ensured, and the filling efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is a top perspective view of a trial of the present invention;
FIG. 4 is a side view of a trial of the present invention;
FIG. 5 is a schematic structural view of an end mold of the present invention;
FIG. 6 is a top and side view of a sideform with a base plate of the present invention;
fig. 7 is a top and side view of a sideform with a top plate of the present invention.
In the figure: 1-first end die, 12-asphalt overflow hole, 2-second end die, 22-asphalt injection hole, 31-top plate, 32-first side die, 41-bottom plate, 42-second side die, 43-first heating device, 5-locking device, 51-female groove, 52-male buckle, 6-die cavity, 7-asphalt pressure filling device, 71-asphalt pressure tank body, 72-asphalt pressure tank cover, 73-piston plate, 74-extrusion opening, 75-second heating device and 76-hydraulic expansion device.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example 1:
as shown in fig. 1-5 and 7, an asphalt ductility test mold convenient to assemble and disassemble includes a first end mold 1, a second end mold 2, a first side mold 32, a second side mold 42, a bottom plate 41 and a top plate 31, wherein the first end mold 1, the second end mold 2, the first side mold 32, the second side mold 42, the bottom plate 41 and the top plate 31 enclose to form an asphalt mold cavity 6, the first side mold 32 and the top plate 31 are integrally formed, and the second side mold 42 and the bottom plate 41 are integrally formed, so that the top plate 31 with the side molds and the bottom plate 41 with the side molds are formed, the relative positions of the side molds, the top plate 31 and the bottom plate 41 can be accurately controlled, and the test precision is improved.
All through latch 5 joint assembly between first side mould 32 and first end mould 1 and the second end mould 2, also all through latch 5 joint assembly between second side mould 42 and first end mould 1 and the second end mould 2. The fixing bolt is omitted, and the dismounting is convenient.
The locking device comprises a male buckle 52 and a female groove 51, the male buckle 52 is arranged on the side end face of each side die jointed with the end die, the female groove 51 is arranged on the side end face of each end die jointed with the side die, the transverse end of the male buckle is in a dovetail shape and is arranged along the thickness direction of the side die; the female slot is a dovetail slot with the size and the shape matched with the male buckle.
Furthermore, an asphalt injection hole 22 and an asphalt overflow hole 12 are further arranged, the asphalt injection hole 22 penetrates through the second end mold 2, the asphalt overflow hole 12 penetrates through the first end mold 1, and the end mold needs to be reserved (does not need to be disassembled) during asphalt ductility test, so that the situation that the sample still needs to be scraped to remove redundant asphalt at the asphalt injection hole 22 and the asphalt overflow hole 12 after mold disassembly is avoided, and therefore, the asphalt sample is formed at one time, and the surface of the sample after mold disassembly is guaranteed to be absolutely smooth.
The test mold is vertically arranged, the asphalt injection hole 22 is positioned at the lowest end of the mold cavity 6, and the asphalt overflow hole 12 is positioned at the topmost end of the mold cavity 6. Thus, the traditional asphalt pouring mode can be changed, and the compactness of asphalt pouring can be effectively ensured by adopting a method of back pouring from bottom to top
As shown in fig. 6, the bottom plate 41 is made of a steel plate, the first heating device 43 is arranged inside the bottom plate 41, the first heating device 43 is a wave-shaped heating wire which is uniformly distributed, so that the asphalt injected into the mold cavity 6 is prevented from being hardened too fast, and a heating flowing state is always maintained, so that the method of back injecting the asphalt from bottom to top is easier to implement, and in addition, the asphalt can flow to the whole mold cavity 6, and the problems of bubbles, unfilled corners and the like in a molded test mold are avoided. Roof 31 and first side form 32 adopt toughened glass integrated into one piece, and transparent toughened glass roof 31 makes things convenient for the tester to observe the filling state of pitch at any time.
As shown in fig. 1, the asphalt pressure filling device 7 is further included, the asphalt pressure filling device 7 includes an asphalt pressure tank 71, an asphalt pressure tank cover 72, a piston plate 73, a hydraulic telescopic device 76, a second heating device 75 and an extrusion port 74, the asphalt pressure tank cover 72 is openably and closably and hermetically disposed at the top of the asphalt pressure tank 71, the piston plate 73 is in sealing fit with the inner wall of the asphalt pressure tank 71, the hydraulic telescopic device 76 is disposed between the bottom of the piston plate 73 and the bottom of the pressure tank, and the hydraulic telescopic device 76 can drive the piston plate 73 to slide up and down along the inner wall of the asphalt pressure tank 71; the second heating device 75 is arranged on the inner wall of the asphalt pressure tank 71 and the top surface of the piston plate 73, the extrusion port 74 is arranged in the middle of the asphalt pressure tank cover 72, and the extrusion port 74 is connected with the asphalt injection hole 22 through a pressure pipe.
The second heating device 75 in the asphalt pressure filling device 7 can realize the rapid heating and melting of asphalt, and the asphalt is pressurized and filled in a manner similar to toothpaste squeezing through the hydraulic telescopic device 76 and the piston plate 73, so that smooth implementation of back filling from bottom to top is utilized, and meanwhile, the compactness of the sample is further ensured, and the filling efficiency is improved.
Furthermore, the cross section of the asphalt pressure tank body 71 is circular, the asphalt pressure tank cover 72 is an outward cone, the top surface of the piston plate 73 is a conical surface matched with the asphalt pressure tank cover 72, and the extrusion port 74 is located at the center of the asphalt pressure tank cover 72, so that asphalt can be naturally gathered towards the extrusion port 74, and can be smoothly extruded; the pressure pipe is wound with an electric heating wire to compensate heat lost by the asphalt in the pressure pipe.
Example 2:
a method for manufacturing an asphalt ductility test sample comprises the following steps:
(1) providing the asphalt ductility test mold which is convenient to assemble and disassemble in the embodiment 1, and uniformly coating the positions of the first side mold 32, the second side mold 42, the bottom plate 41 and the top plate 31, which correspond to the mold cavity 6, with the isolating agent;
(2) horizontally placing the bottom plate 41 with the second side die 42 on a test bed in a mode that the second side die 42 faces upwards, enabling the first end die 1 and the male buckle 52 on the end face of one side of the second side die 42 to be in sliding insertion assembly from the top end to the bottom end of the second side die 42 through the corresponding dovetail groove on the first end die 1, and enabling the second end die 2 and the male buckle 52 on the end face of the other side of the second side die 42 to be in sliding insertion assembly from the top end to the bottom end of the second side die 42 through the corresponding dovetail groove on the second end die 2;
(3) the top plate 31 with the first side die 32 faces the first side die 32, and after the male buckles 52 of the first side die 32 correspond to the corresponding dovetail grooves of the first end die 1 and the second end die 2 one by one, the male buckles 52 on the end surfaces of the two sides of the first side die 32 are respectively assembled with the corresponding dovetail grooves of the first end die 1 and the second end die 2 in a sliding and inserting manner along the vertical direction;
(4) fixing the assembled test mold on a test bed in a vertical mode that a first end mold 1 is arranged above and a second end mold 2 is arranged below;
(5) communicating an extrusion port 74 of the asphalt pressure filling device 7 with an asphalt filling hole 22 through a pressure pipe, opening an asphalt pressure tank cover 72, and filling test asphalt into the asphalt pressure tank;
(6) switching on the second heating device 75, closing the asphalt pressure tank cover 72 when the asphalt in the asphalt pressure is in a molten state, switching on the first heating device 43 and the electric heating wires on the pressure pipe, and starting the hydraulic telescopic device 76;
(7) the molten asphalt is slowly injected into the mold cavity 6 through the asphalt injection hole 22, the asphalt filling state is observed at any time through the transparent top plate 31, the filling compactness is ensured, and when the asphalt overflows from the asphalt overflow hole 12, the hydraulic telescopic device 76 is closed, and the power supply of the electric heating wires on the first heating device 43, the second heating device 75 and the pressure pipe is cut off;
(8) after the asphalt is initially cooled, the pressure pipe is dismantled, and the excess asphalt in the pressure pipe and the asphalt pressure filling device 7 is cleaned in time;
(9) and after the asphalt is cooled, removing the side mold with the top plate and the side mold with the bottom plate, placing the sample in a constant-temperature water bath box for maintenance, and waiting for the test.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (5)
1. The utility model provides a simple to assemble and disassemble's pitch ductility examination mould, includes first end mould, second end mould, first side mould, second side mould, bottom plate, roof, first end mould, second end mould, first side mould, second side mould, bottom plate, roof enclose to close and form pitch die cavity, its characterized in that: the first side die and the top plate are integrally formed, the second side die and the bottom plate are integrally formed, the first side die and the first end die and the second end die are assembled in a clamping mode through a locking device, and the second side die and the first end die and the second end die are assembled in a clamping mode through the locking device;
the locking device comprises a male buckle and a female groove, the male buckle is arranged on the side end face of each side die jointed with the end die, the female groove device is arranged on the side end face of each end die jointed with the side die, and the transverse end of the male buckle is in a dovetail shape and is arranged along the thickness direction of the side die; the female slot is a dovetail slot with the size and the shape matched with those of the male buckle; the test mould is further provided with an asphalt injection hole and an asphalt overflow hole, the asphalt injection hole penetrates through the second end mould, the asphalt overflow hole penetrates through the first end mould, the test mould is vertically arranged, the asphalt injection hole is located at the lowest end of the mould cavity, and the asphalt overflow hole is located at the topmost end of the mould cavity.
2. The asphalt ductility test mold convenient to disassemble and assemble according to claim 1, characterized in that: the bottom plate adopts the steel sheet, bottom plate inside is provided with first heating device, first heating device is evenly distributed's wave heating wire, roof and first side form adopt toughened glass integrated into one piece.
3. The asphalt ductility test mold convenient to disassemble and assemble according to claim 2, characterized in that: the asphalt pressure filling device comprises an asphalt pressure tank body, an asphalt pressure tank cover, a piston plate, a hydraulic telescopic device, a second heating device and an extrusion port, wherein the asphalt pressure tank cover is arranged at the top of the asphalt pressure tank body in a sealing mode in an openable mode, the piston plate is matched with the inner wall of the asphalt pressure tank body in a sealing mode, the hydraulic telescopic device is arranged between the bottom of the piston plate and the bottom of the asphalt pressure tank body, and the hydraulic telescopic device can drive the piston plate to slide up and down along the inner wall of the asphalt pressure tank body; the second heating device is arranged on the inner wall of the asphalt pressure tank body and the top surface of the piston plate, the extrusion port is arranged in the middle of the asphalt pressure tank cover, and the extrusion port is connected with the asphalt injection hole through a pressure pipe.
4. The asphalt ductility test mold convenient to disassemble and assemble according to claim 3, characterized in that: the transversal of the pitch pressure tank body is personally submitted circularly, pitch pressure cover is outside cone, the top surface of piston plate be with the conical surface of pitch pressure cover looks adaptation, it is located to extrude the mouth the central point of pitch pressure cover puts, the winding has the heating wire on the pressure pipe.
5. A method for manufacturing an asphalt ductility test sample is characterized by comprising the following steps: the method comprises the following steps:
(1) providing the asphalt ductility test mold which is convenient to assemble and disassemble according to claim 4, and uniformly coating a separant on the positions of the first side mold, the second side mold, the bottom plate and the top plate, which correspond to the mold cavity;
(2) horizontally placing the bottom plate with the second side die on a test bed in a mode that the second side die faces upwards, enabling the first end die to be assembled with the dovetail-shaped male buckle on the end face of one side of the second side die from the top end to the bottom end of the second side die in a sliding and inserting mode through the corresponding dovetail groove on the first end die, and enabling the second end die to be assembled with the male buckle on the end face of the other side of the second side die in a sliding and inserting mode from the top end to the bottom end of the second side die through the corresponding dovetail groove on the second end die;
(3) the top plate with the first side die faces towards the first side die, after the male buckles of the first side die are in one-to-one correspondence with the corresponding dovetail grooves of the first end die and the second end die, the male buckles on the end faces of the two sides of the first side die are respectively assembled with the corresponding dovetail grooves of the first end die and the second end die in a sliding and inserting mode along the vertical direction;
(4) fixing the assembled test mold on a test bed in a vertical mode that a first end mold is arranged on the upper part and a second end mold is arranged on the lower part;
(5) communicating an extrusion opening and an asphalt injection hole of the asphalt pressure filling device through a pressure pipe, opening an asphalt pressure tank cover, and injecting test asphalt into the asphalt pressure tank;
(6) switching on the second heating device, closing the asphalt pressure tank cover when asphalt in the asphalt pressure is in a molten state, switching on the first heating device and the electric heating wires on the pressure pipe, and starting the hydraulic stretching device;
(7) molten asphalt is slowly injected into the die cavity through an asphalt injection hole, the asphalt filling state is observed at any time through a transparent top plate, the filling compactness is ensured, and when asphalt overflows from an asphalt overflow hole, the hydraulic telescopic device is closed, and the power supply of electric heating wires on the first heating device, the second heating device and the pressure pipe is cut off;
(8) after the asphalt is initially cooled, removing the pressure pipe, and timely cleaning redundant asphalt in the pressure pipe and the asphalt pressure perfusion device;
(9) and after the asphalt is cooled, removing the side mold with the top plate and the side mold with the bottom plate, placing the sample in a constant-temperature water bath box for maintenance, and waiting for the test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291375.0A CN109883795B (en) | 2019-04-12 | 2019-04-12 | Asphalt ductility test mold convenient to disassemble and assemble and manufacturing method of sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291375.0A CN109883795B (en) | 2019-04-12 | 2019-04-12 | Asphalt ductility test mold convenient to disassemble and assemble and manufacturing method of sample |
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| CN109883795A CN109883795A (en) | 2019-06-14 |
| CN109883795B true CN109883795B (en) | 2022-04-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226148A (en) * | 2016-07-21 | 2016-12-14 | 桂林理工大学 | A kind of method ensureing that in bitumen ductility test filling mold process, upper and lower surface is smooth |
| CN206248428U (en) * | 2016-11-22 | 2017-06-13 | 羽夏力 | Bituminous paving bitumen ductility sample mould |
| CN206450492U (en) * | 2017-01-23 | 2017-08-29 | 成都理工大学 | Bitumen ductility die trial |
| CN206556959U (en) * | 2017-03-13 | 2017-10-13 | 广西世诚工程检测有限公司 | The eight word die trials detected for bitumen ductility |
-
2019
- 2019-04-12 CN CN201910291375.0A patent/CN109883795B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226148A (en) * | 2016-07-21 | 2016-12-14 | 桂林理工大学 | A kind of method ensureing that in bitumen ductility test filling mold process, upper and lower surface is smooth |
| CN206248428U (en) * | 2016-11-22 | 2017-06-13 | 羽夏力 | Bituminous paving bitumen ductility sample mould |
| CN206450492U (en) * | 2017-01-23 | 2017-08-29 | 成都理工大学 | Bitumen ductility die trial |
| CN206556959U (en) * | 2017-03-13 | 2017-10-13 | 广西世诚工程检测有限公司 | The eight word die trials detected for bitumen ductility |
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| CN109883795A (en) | 2019-06-14 |
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