High-performance asphalt forming mold with strain real-time monitoring function

Abstract

The utility model discloses a high-performance asphalt forming mold with a strain real-time monitoring function, which comprises a stainless steel mold main body, and the stainless steel mold main body consists of a first mold and a second mold which are detachably connected; a cavity for forming the high-performance asphalt test piece is formed in the second mold, a transverse strain gauge assembly and a longitudinal strain gauge assembly are mounted on the side wall of the cavity, and the transverse strain gauge assembly and the longitudinal strain gauge assembly are respectively used for detecting the horizontal strain and the vertical strain of the high-performance asphalt test piece in the cavity. When the high-performance asphalt test piece is manufactured, operation is easy, demolding is easy, the size accuracy is high, the mold is not prone to deformation, the size stability of the high-performance asphalt test piece can be effectively guaranteed, meanwhile, horizontal strain and vertical strain at different depths in the curing or cooling process of the high-performance asphalt test piece can be detected in real time, and the detection accuracy is high. And a data source is provided for exploring the influence of the high-performance asphalt cement on the strain response at different depths.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt forming molds, and in particular to a high-performance asphalt forming mold with real-time strain monitoring. Background Art

[0002] Traditional asphalt pavement is often affected by factors such as traffic load and temperature changes during use, and is prone to cracks and deformation, leading to safety hazards. Therefore, it is necessary to test its key mechanical properties, one of which is the tensile stress and strain test, which is used to characterize the ability of the test sample to resist external tension and deformation, and to use asphalt molding molds to obtain samples with stable performance.

[0003] However, existing asphalt molding molds usually use polytetrafluoroethylene material molds to prepare high-performance asphalt specimens. However, it is found during operation that demolding is often difficult when using polytetrafluoroethylene molds to prepare high-performance asphalt specimens. The specimens are easily damaged during forced demolding, resulting in experimental errors and inability to accurately characterize the mechanical properties of the high-performance asphalt itself. The prior art CN206804377U discloses a mold for making epoxy asphalt specimens and a mold for making the mold. The mold for preparing high-performance asphalt specimens is made of silicone. Under high temperature conditions, such as 150-180°C (general mixing and curing temperature of hot-mixed high-performance asphalt), the mold is extremely easy to deform, resulting in unstable specimen size, thereby affecting the stability of the experimental results.

[0004] To sum up, for the existing asphalt molding molds, the use of polytetrafluoroethylene molds or silicone molds to prepare high-performance asphalt specimens has great disadvantages, which brings great difficulties to the evaluation of high-performance asphalt. At the same time, the existing asphalt molding molds do not have strain detection functions and cannot monitor the strain of the test specimens in real time. Therefore, there is an urgent need for a high-performance asphalt molding mold with real-time strain monitoring. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a high-performance asphalt molding mold with real-time strain monitoring.

[0006] The utility model discloses a high-performance asphalt molding mold with real-time strain monitoring, comprising a stainless steel mold body, wherein the stainless steel mold body is composed of a first mold and a second mold that are detachably connected;

[0007] The second mold is provided with a cavity for molding a high-performance asphalt specimen, and a release agent coating is provided on the side wall and the bottom wall of the cavity;

[0008] A transverse strain gauge assembly and a longitudinal strain gauge assembly are installed on the side wall of the cavity, and the transverse strain gauge assembly and the longitudinal strain gauge assembly are used to detect the horizontal strain and vertical strain of the high-performance asphalt specimen in the cavity, respectively.

[0009] As a further improvement of the present invention, the first mold and the second mold are both rectangular molds, and the first mold and the second mold are both placed in a vertical direction;

[0010] Buckles are symmetrically installed at both ends of the second mold, and buckle connecting ports that cooperate with the buckles are symmetrically installed at both ends of the first mold. The first mold and the second mold are connected through the buckles and the buckle connecting ports.

[0011] As a further improvement of the present invention, the first mold is a smooth stainless steel panel;

[0012] The buckles are symmetrically mounted at both ends of the stainless steel panel.

[0013] As a further improvement of the present invention, a pouring port communicating with the cavity is provided on the top side of the second mold;

[0014] The length and width of the pouring port are adapted to the length and thickness of the cavity.

[0015] As a further improvement of the present invention, the cavity is a rectangular cavity; the length of the rectangular cavity is 150mm-300mm; the width of the rectangular cavity is 140mm-250mm; and the thickness of the rectangular cavity is 1-5mm.

[0016] As a further improvement of the utility model, the release agent coating includes but is not limited to a polytetrafluoroethylene emulsion coating;

[0017] The polytetrafluoroethylene emulsion coating is provided on the side wall and the bottom wall of the cavity.

[0018] As a further improvement of the present invention, the transverse strain gauge assembly includes a plurality of first strain gauges parallel to the long side direction of the cavity and a plurality of second strain gauges parallel to the short side direction of the cavity;

[0019] The longitudinal strain gauge assembly includes a plurality of third strain gauges laid along the thickness direction of the cavity;

[0020] The spacing between two adjacent first strain gauges, the spacing between two adjacent second strain gauges and the spacing between two adjacent third strain gauges are all 10-25 mm.

[0021] As a further improvement of the utility model, it also includes a computer display;

[0022] The transverse strain gauge assembly and the longitudinal strain gauge assembly are respectively connected to the computer display, and the computer display is used to display the stress detection values ​​and images of the transverse strain gauge assembly and the longitudinal strain gauge assembly.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model is simple to operate and easy to demould when making high-performance asphalt test pieces, which improves the stability of high-performance asphalt test pieces. At the same time, by adopting stainless steel molds, compared with existing polytetrafluoroethylene and silicone materials, the shrinkage is small, the dimensional accuracy is high, and the chemical corrosion resistance, high temperature resistance and tear resistance are good, the durability is good and it is not easy to be damaged;

[0025] The utility model can sense the horizontal strain and vertical strain at different depths during the curing or cooling process of high-performance asphalt specimens by installing transverse strain gauge components and longitudinal strain gauge components on the side wall of the cavity, providing a data source for exploring the influence of high-performance asphalt binder on strain response at different depths. At the same time, the strain gauge component can monitor the internal strain of the high-performance asphalt specimen binder in real time, discover potential problems in time, and help improve the uniformity and durability of the asphalt pavement. By monitoring stress data through the strain gauge component, a scientific pavement maintenance plan can be formulated to extend the service life of the pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The three structural views of a high-performance asphalt forming mold with real-time strain monitoring disclosed in an embodiment of the utility model;

[0027] Figure 2 The three structural views of the first mold of the high-performance asphalt molding mold with real-time strain monitoring disclosed in one embodiment of the utility model;

[0028] Figure 3 The structural three views of the second mold of the high-performance asphalt molding mold with real-time strain monitoring disclosed in one embodiment of the utility model;

[0029] Figure 4 It is a schematic structural diagram of a transverse strain gauge assembly and a longitudinal strain gauge assembly of a high-performance asphalt molding mold with real-time strain monitoring disclosed in an embodiment of the utility model.

[0030] In the figure:

[0031] 1. Stainless steel mold body; 11. First mold; 111. Buckle connection port; 12. Second mold; 121. Cavity; 122. Buckle; 2. Longitudinal strain gauge assembly; 21. Third strain gauge; 3. Transverse strain gauge assembly; 31. First strain gauge; 32. Second strain gauge; 4. Release agent coating. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0036] like Figure 1 As shown, a high-performance asphalt molding mold with real-time strain monitoring provided by the utility model includes a stainless steel mold body 1, which is composed of a first mold 11 and a second mold 12 that are detachably connected; wherein, a cavity 121 for molding a high-performance asphalt specimen is provided in the second mold 12, and a release agent coating 4 is provided on the side walls and bottom walls of the cavity 121; a transverse strain gauge assembly 3 and a longitudinal strain gauge assembly 2 are installed on the side walls of the cavity 121, and the transverse strain gauge assembly 3 and the longitudinal strain gauge assembly 2 are respectively used to detect the horizontal strain and vertical strain of the high-performance asphalt specimen in the cavity 121.

[0037] In this embodiment, by setting a stainless steel mold body 1 and installing a transverse strain gauge assembly 3 and a longitudinal strain gauge assembly 2 in the cavity 121 of the second mold 12, it is achieved that when making high-performance asphalt specimens, the operation is simple and the demolding is easy, and the stability of the high-performance asphalt specimens is improved. At the same time, compared with the existing polytetrafluoroethylene and silicone materials, the material of the stainless steel mold has small shrinkage, high dimensional accuracy, good chemical corrosion resistance, high temperature resistance and tear resistance, good durability and is not easy to be damaged; at the same time, the setting of the transverse strain gauge assembly 3 and the longitudinal strain gauge assembly 2 can sense the horizontal strain and vertical strain at different depths during the maintenance or cooling process of the high-performance asphalt specimens, providing a data source for exploring the influence of high-performance asphalt binder on the strain response at different depths.

[0038] Specific:

[0039] like Figure 1 As shown, in the above embodiment, preferably, the first mold 11 and the second mold 12 are both rectangular molds.

[0040] like Figure 2 As shown, in the above embodiment, preferably, the first mold 11 includes a rectangular stainless steel panel placed in the vertical direction, the surface of the rectangular stainless steel panel is flat and smooth, and two groups of snap connection ports 111 are symmetrically installed at both ends of the rectangular stainless steel panel, and the number of each group of snap connection ports 111 is 2.

[0041] like Figure 3 As shown, in the above embodiment, preferably, a pouring gate connected to the cavity 121 is provided on the top side of the second mold 12, and the length and width of the pouring gate are adapted to the length and thickness of the cavity 121; buckles 122 cooperating with two groups of snap connection ports 111 are symmetrically installed at both ends of the second mold 12, and the number of buckles 122 in each group is 2. During actual assembly, the first mold 11 and the second mold 12 are snap-connected through the buckles 122 and the buckle connection ports 111.

[0042] In the above embodiment, preferably, the cavity 121 is a rectangular cavity; the length of the rectangular cavity is 150mm-300mm; the width of the rectangular cavity is 140mm-250mm; the thickness of the rectangular cavity is 1-5mm. The size of the rectangular cavity can be adjusted according to the test requirements of the high-performance asphalt specimen.

[0043] In the above embodiment, preferably, the release agent coating 4 includes but is not limited to a polytetrafluoroethylene emulsion coating. During actual processing, the polytetrafluoroethylene emulsion can be evenly applied to the side wall, the bottom wall of the rectangular cavity and the inner wall of the first mold to form a polytetrafluoroethylene emulsion coating; the polytetrafluoroethylene emulsion in this embodiment can also be replaced by other release agents.

[0044] like Figure 1 and Figure 4 As shown, in the above embodiment, preferably, the transverse strain gauge assembly 3 includes a plurality of first strain gauges 31 parallel to the long side direction of the cavity 121 and a plurality of second strain gauges 32 parallel to the short side direction of the cavity 121; the longitudinal strain gauge assembly 2 includes a plurality of third strain gauges 21 laid along the thickness direction of the cavity 121; during actual installation, since the long side wall at the top of the cavity 121 is connected to the pouring port, no strain gauge is installed on the long side wall at the top of the cavity 121, the longitudinal strain gauge assembly 2 is installed on one short side wall of the cavity 121, and the transverse strain gauge assembly 2 is installed on the other short side wall Part 3, a longitudinal strain gauge assembly 2 is installed in the middle section of the long side wall at the bottom of the cavity 121, and transverse strain gauge assemblies 3 are symmetrically installed at both ends of the longitudinal strain gauge assembly 2. In this embodiment, the transverse strain gauge assembly 3 and the longitudinal strain gauge assembly 2 can sense the horizontal strain and vertical strain at different depths during the curing or cooling process of the high-performance asphalt specimen, which provides a data source for exploring the influence of high-performance asphalt binder on the strain response at different depths. At the same time, it can eliminate the difference in test results caused by different transverse and longitudinal arrangements, further ensuring the rationality and scientificity of the test results.

[0045] In the above embodiment, preferably, the transverse strain gauge assembly 3 and the longitudinal strain gauge assembly 2 are both welded to the short side walls on both sides and the long side wall at the bottom of the cavity 121 by welding.

[0046] In the above embodiment, preferably, the spacing between two adjacent first strain gauges 31 , the spacing between two adjacent second strain gauges 32 , and the spacing between two adjacent third strain gauges 21 are all 10-25 mm.

[0047] In the above embodiment, preferably, a computer monitor is also included, and the transverse strain gauge assembly 3 and the longitudinal strain gauge assembly 2 are respectively connected to the computer monitor, and the computer monitor is used to display the stress detection values ​​and images of the transverse strain gauge assembly 3 and the longitudinal strain gauge assembly 2.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-performance asphalt forming mold with real-time strain monitoring, characterized in that: It comprises a stainless steel mold body, wherein the stainless steel mold body is composed of a first mold and a second mold that are detachably connected; The second mold is provided with a cavity for molding a high-performance asphalt specimen, and a release agent coating is provided on the side wall and the bottom wall of the cavity; A transverse strain gauge assembly and a longitudinal strain gauge assembly are installed on the side wall of the cavity, and the transverse strain gauge assembly and the longitudinal strain gauge assembly are used to detect the horizontal strain and vertical strain of the high-performance asphalt specimen in the cavity, respectively.

2. The high-performance asphalt forming mold with real-time strain monitoring according to claim 1 is characterized in that: The first mold and the second mold are both rectangular molds, and the first mold and the second mold are both placed in a vertical direction; Buckles are symmetrically installed at both ends of the second mold, and buckle connecting ports that cooperate with the buckles are symmetrically installed at both ends of the first mold. The first mold and the second mold are connected through the buckles and the buckle connecting ports.

3. The high-performance asphalt forming mold with real-time strain monitoring according to claim 2 is characterized in that: The first mold is a smooth stainless steel panel; The buckles are symmetrically mounted at both ends of the stainless steel panel.

4. The high-performance asphalt forming mold with real-time strain monitoring according to claim 2 is characterized in that: The top side of the second mold is provided with a pouring port connected to the mold cavity; The length and width of the pouring port are adapted to the length and thickness of the cavity.

5. The high-performance asphalt forming mold with real-time strain monitoring according to claim 1, characterized in that: The cavity is a rectangular cavity; the length of the rectangular cavity is 150mm-300mm; the width of the rectangular cavity is 140mm-250mm; and the thickness of the rectangular cavity is 1-5mm.

6. The high-performance asphalt forming mold with real-time strain monitoring according to claim 1, characterized in that: The release agent coating includes but is not limited to a polytetrafluoroethylene emulsion coating; The polytetrafluoroethylene emulsion coating is provided on the side wall and the bottom wall of the cavity.

7. The high-performance asphalt forming mold with real-time strain monitoring according to claim 1, characterized in that: The transverse strain gauge assembly includes a plurality of first strain gauges parallel to the long side direction of the cavity and a plurality of second strain gauges parallel to the short side direction of the cavity; The longitudinal strain gauge assembly includes a plurality of third strain gauges laid along the thickness direction of the cavity; The spacing between two adjacent first strain gauges, the spacing between two adjacent second strain gauges and the spacing between two adjacent third strain gauges are all 10-25 mm.

8. The high-performance asphalt forming mold with real-time strain monitoring according to claim 1, characterized in that: Also includes computer monitors; The transverse strain gauge assembly and the longitudinal strain gauge assembly are respectively connected to the computer display, and the computer display is used to display the stress detection values ​​and images of the transverse strain gauge assembly and the longitudinal strain gauge assembly.

Images