Asphalt mixture asphalt fluctuation detection device and method

Abstract

The invention provides an asphalt mixture asphalt fluctuation detection device and method.The asphalt mixture asphalt fluctuation detection device comprises a device body and a measuring assembly assembled on a vibration table of the device body, and the measuring assembly comprises a forming cylinder and a height measuring device assembled with the forming cylinder in a combined mode; the height measuring device is arranged on one side far away from the vibration table; the forming cylinder comprises a filler cylinder and a test mold cylinder which are detachably arranged in a communicating manner, and the test mold cylinder is arranged on one side close to the vibration table; the height measuring device comprises a detection plate, the detection plate is suspended in the forming cylinder and moves up and down in the height direction of the cylinder, and the height measuring device is used for monitoring the height change of the asphalt mixture in the cylinder so as to judge whether the fluctuation of the asphalt content meets the requirement or not. The detection device provided by the invention can be used for detecting the asphalt volatility of the asphalt mixture, and is high in detection accuracy, convenient to operate, non-toxic and harmless.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering, and in particular to a device and method for detecting asphalt fluctuations in asphalt mixtures. Background Art

[0002] Excessive fluctuations in the grading and asphalt content of asphalt mixture will have an adverse effect on the structural properties of asphalt concrete, so it is necessary to control the fluctuations within a certain range.

[0003] The existing extraction method is a common method for testing fluctuations. This method uses trichloroethylene, but this solvent is volatile and toxic, and pollutes the environment.

[0004] Therefore, it is very necessary to develop a detection method that does not rely on trichloroethylene solvent to detect the volatility of asphalt mixture. Summary of the invention

[0005] The main purpose of the present invention is to provide a device and method for detecting asphalt fluctuations in asphalt mixtures. The detection device provided by the present invention can be used to detect asphalt fluctuations in asphalt mixtures. It has high detection accuracy, is easy to operate, and is non-toxic and harmless.

[0006] In order to achieve the above objectives, the present invention provides the following technical solutions.

[0007] The first aspect of the present invention provides an asphalt fluctuation detection device for asphalt mixture, which includes a device body and a measuring component mounted on a vibration table of the device body, the measuring component includes a molding cylinder and a height measuring device assembled with the molding cylinder, the height measuring device is placed on a side away from the vibration table; the molding cylinder includes a detachable and connected filling cylinder and a test mold cylinder, the test mold cylinder is placed on a side close to the vibration table; the height measuring device includes a detection plate, the detection plate is suspended inside the molding cylinder and moves up and down along the height direction of the cylinder, and the height measuring device is used to monitor the height change of the asphalt mixture in the cylinder to determine whether the fluctuation of its asphalt content meets the requirements.

[0008] In some embodiments of the present invention, the filling tube and the trial mold tube are each independently in the shape of a cylinder with both ends open, and the inner diameter of the filling tube is the same as the inner diameter of the trial mold tube.

[0009] In some embodiments of the present invention, the height measuring device further includes a magnetostrictive sensor and a magnetic ring that moves synchronously with the detection plate, and the magnetostrictive sensor is used to monitor the position height and / or moving distance of the detection plate in real time.

[0010] In some embodiments of the present invention, the height measuring device also includes a guide shaft and a support column, one end of the guide shaft is connected to the detection plate, and the end of the guide shaft away from the detection plate is used to connect to the magnetic ring; the magnetostrictive sensor is arranged at one end of the support column, and the magnetic ring is sleeved on the support column and reciprocates along the length direction of the support column.

[0011] In some embodiments of the present invention, the height measuring device also includes a magnetic ring connecting plate, one end of the magnetic ring connecting plate is connected to the magnetic ring, and the end of the magnetic ring connecting plate away from the magnetic ring is connected to the end of the guide shaft away from the detection plate.

[0012] In some embodiments of the present invention, the height measuring device further includes a linear bearing assembly connected and cooperated with the guide shaft.

[0013] In some embodiments of the present invention, the measuring assembly further comprises a cylinder cover cooperating with the forming cylinder, wherein the cylinder cover is placed on a side away from the vibration table; and the detection plate extends into the interior of the forming cylinder through the cylinder cover.

[0014] In some embodiments of the present invention, the device body further comprises a support frame for supporting the measuring component.

[0015] According to a second aspect of the present invention, a method for detecting asphalt fluctuation of asphalt mixture is provided, and the detection method is based on the asphalt fluctuation detection device for asphalt mixture according to the first aspect; the detection method comprises: assembling a measuring component on a vibration table; filling a molding cylinder with a prepared asphalt mixture, starting the vibration table to compact the asphalt mixture, and a detection plate abuts against the upper surface of the asphalt mixture to obtain the height H1 of the asphalt mixture at this time; disassembling the molding cylinder, starting the vibration table again, presetting the vibration frequency and vibration time T, so that the asphalt mixture flows under the action of vibration, and the detection plate moves downward with the asphalt mixture to obtain the height H2 of the asphalt mixture at this time, and calculating the fluidity V of the asphalt mixture; wherein V=(H1-H2) / T; judging whether the asphalt content fluctuation meets the requirements according to the fluidity V of the asphalt mixture.

[0016] In some embodiments of the present invention, the asphalt mixture includes BBME0-14 asphalt mixture, and when the fluidity of the asphalt mixture is below 1.55 cm / s, the asphalt content fluctuation meets the quality requirements.

[0017] Compared with the prior art, the present invention achieves the following technical effects:

[0018] The invention provides a detection device which can be used for detecting the volatility of asphalt in asphalt mixture, has high detection accuracy, is easy to operate, and is non-toxic and harmless.

[0019] In the detection method of the present invention, when the fluidity of the asphalt mixture is below 1.55 cm / s, it can be determined that the fluctuation of the asphalt content of the asphalt mixture meets the requirements.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0022] Figure 1 A schematic diagram of the structure of an asphalt mixture asphalt fluctuation detection device according to one or more embodiments;

[0023] Figure 2 is a schematic diagram of the structure of a measurement component according to one or more embodiments;

[0024] Figure 3 is a cross-sectional view of a measurement assembly according to one or more embodiments;

[0025] Figure 4 This is a curve chart showing the relationship between the oil-stone ratio and fluidity of BBME0-14 asphalt mixture.

[0026] Reference numerals:

[0027] 1000. Asphalt fluctuation detection device;

[0028] 100. Device body; 10. Vibration table; 11. Support frame;

[0029] 200, measurement components;

[0030] 20. forming cylinder; 30. height measuring device; 40. cylinder cover;

[0031] 21. Filling cylinder; 22. Trial mold cylinder;

[0032] 31. Detection plate; 32. Magnetotropic sensor; 33. Magnetic ring; 34. Guide shaft; 35. Support column; 36. Magnetic ring connecting plate; 37. Linear bearing assembly; 371. Linear bearing seat; 372. Linear bearing; 38. Magnetotropic sensor base. DETAILED DESCRIPTION

[0033] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0040] The present invention mainly utilizes the main characteristics of hot-mix asphalt mixture to design the detection method. The first is the flow variability of hot-mix asphalt mixture under vibration conditions. Theoretically, an asphalt mixture with a certain mix ratio should have a unique corresponding flow velocity when subjected to external force vibration under the same conditions. The second is the bulk density fluctuation of hot-mix asphalt mixture. An asphalt mixture with a certain mix ratio should have a corresponding hot-mix asphalt mixture bulk density value range.

[0041] In the embodiment of the present invention, after the dense-graded hot-mix asphalt mixture is mixed, the viscosity inside the graded asphalt mixture is determined within the compaction temperature range (e.g., 155±5°C). This viscosity is related to the asphalt content in the mixture and the ability of the mineral in the mixture to absorb asphalt. When the asphalt content is insufficient or excessive, the viscosity between the aggregates inside the asphalt mixture will decrease. By applying a certain vibration force to the asphalt mixture within the compaction temperature range and under certain peripheral constraints, the asphalt mixture can be bonded into a whole of a certain shape. As the asphalt content in the asphalt mixture changes, this integrity will change accordingly, and the corresponding bulk density will also be different. This property is used to determine whether the asphalt content in the asphalt mixture is appropriate, or to determine the volatility of the quality of the hot-mix asphalt mixture.

[0042] It is worth mentioning that the detection method in the present invention is based on the detection device designed by the present invention.

[0043] The present invention provides a Figure 1 The asphalt mixture asphalt fluctuation detection device 1000 shown in FIG. Figures 2 to 3It is introduced that it includes a device body 100 and a measuring component 200 assembled on the vibration table 10 of the device body 100, the measuring component 200 includes a forming cylinder 20 and a height measuring device 30 assembled in combination with the forming cylinder 20, and the height measuring device 30 is placed on a side away from the vibration table 10; the forming cylinder 20 includes a detachable and connected filling cylinder 21 and a test mold cylinder 22, and the test mold cylinder 22 is placed on a side close to the vibration table 10; the height measuring device 30 includes a detection plate 31, the detection plate 31 is suspended inside the forming cylinder 20 and moves up and down along the height direction of the cylinder, and the height measuring device 30 is used to monitor the height change of the asphalt mixture in the cylinder to determine whether the fluctuation of its asphalt content meets the requirements.

[0044] In the embodiment of the present invention, when in use, the asphalt mixture can be filled into the inner cavity of the forming cylinder 20, wherein the forming cylinder 20 can also be preheated before being filled with the asphalt mixture, and the asphalt mixture can also be prepared in advance and placed in an oven at a specified temperature for insulation. During the inspection process, the temperature of the sample can also be measured using instruments such as a non-contact infrared thermometer to facilitate data comparison later.

[0045] See also Figure 1 As shown, the device body 100, or can be understood as the device host, has a vibration table 10 with a vibration table surface not less than 60cm*60cm, a vibration frequency adjustable from 0 to 100Hz, an amplitude of 0 to 5mm, and a vibration time adjustable from 0 to 40s.

[0046] In the embodiment of the present invention, when the forming cylinder 20 is placed on the vibration table 10 , the bottom end of the forming cylinder 20 abuts against the table surface of the vibration table 10 , and the table surface of the vibration table 10 forms the bottom surface of the forming cylinder 20 .

[0047] Continue to see Figure 1 As shown, the device body 100 further includes a support frame 11 , which can be disposed on the vibration table 10 , for supporting and installing the measurement component 200 .

[0048] In an embodiment of the present invention, the support frame 11 may also be configured as a retractable structure. When the vibration table 10 vibrates, the support frame 11 supports the filler tube 21 away from the vibration table 10 to facilitate the asphalt mixture to flow under vibration.

[0049] In the embodiment of the present invention, the device body 100 further has a computing system, a weighing system and a display system.

[0050] See also Figure 2 and Figure 3 As shown, the filling tube 21 and the trial mold tube 22 in the forming tube 20 are independently cylindrical with both ends open, and the inner diameter of the filling tube 21 is the same as the inner diameter of the trial mold tube 22.

[0051] In the embodiment of the present invention, the size of the filling tube 21 can be set according to actual needs, such as a stainless steel cylindrical tube with a diameter of 16 cm and a height of 32 cm, or a stainless steel cylindrical tube with a diameter of 20 cm and a height of 40 cm, or a stainless steel cylindrical tube with a diameter of 11.2 cm and a height of 22.4 cm, or a stainless steel cylindrical tube with a diameter of 8 cm and a height of 16 cm, etc., without specific limitation. Correspondingly, the filling tube 21 is connected to a detachable test mold tube 22 with the same diameter, and the height of the test mold tube 22 can be 8 cm, or 10 cm, or 5.6 cm, or 4 cm, etc., without specific limitation.

[0052] In an embodiment of the present invention, when filling the asphalt mixture into the inner cavity of the forming cylinder 20, a circular trapezoidal funnel can be used in conjunction, wherein the material of the funnel can be stainless steel, and the size of the funnel can be selected according to actual conditions, such as the inner diameter of the funnel is equivalent to the inner diameter of the filling cylinder 21.

[0053] Continue to see Figure 2 and Figure 3 The measuring assembly 200 further includes a cylinder cover 40 that cooperates with the forming cylinder 21 , and the cylinder cover 40 is placed on a side away from the vibration table 10 ; the detection plate 31 extends into the interior of the forming cylinder 21 through the cylinder cover 40 .

[0054] Continue to see Figure 3 As shown, the height measuring device 30 is arranged on the cylinder cover 40, and it can also be understood that the cylinder cover 40 can be used as a mounting seat for the height measuring device 30. The height measuring device 30 includes a detection plate 31, and the detection plate 31 extends into the interior of the molding cylinder 21. During operation, the detection plate 31 abuts against the upper surface (top surface) of the asphalt mixture, thereby playing a role in measuring the height of the asphalt mixture in the cylinder cavity. At this time, its role is equivalent to that of a measuring head, and at the same time, it plays a role in compacting and molding the asphalt mixture during the molding process.

[0055] In an embodiment of the present invention, the detection plate 31 is disc-shaped and is used in conjunction with the filling tube 21. Therefore, the size specifications of the detection plate 31 need to be set with reference to the inner diameter of the filling tube 21. For example, the size specifications with outer diameters of 20 cm, 16 cm, 11.2 cm, and 8 cm can be adopted, and the specific selection is made according to the actual situation.

[0056] Continue to see Figure 3As shown, the height measuring device 30 also includes a magnetostrictive sensor 32 and a magnetic ring 33 that moves synchronously with the detection plate 31. The magnetostrictive sensor 32 is used to monitor the position height and moving distance of the detection plate 31 in real time, and output a signal to the device body, so as to calculate the fluidity V of the asphalt mixture. In an embodiment of the present invention, the height measuring device 30 also includes a magnetostrictive sensor base 38 to install the magnetostrictive sensor 32, and the magnetostrictive sensor 32 is used to test the height change of the asphalt mixture under the flow condition, which is used to calculate the fluidity, so as to determine whether the fluctuation of the asphalt content meets the requirements.

[0057] Continue to see Figure 3 As shown, the height measuring device 30 also includes a guide shaft 34 and a support column 35. The guide shaft 34 and the support column 35 are independently and parallelly arranged. One end of the guide shaft 34 is connected to the detection plate 31 and extends into the inner cavity of the forming cylinder 20 through the cylinder cover 40. The guide shaft 34 is slidably connected to the cylinder cover 40, that is, the guide shaft 34 moves up and down relative to the cylinder cover 40. The end of the guide shaft 34 away from the detection plate 31 is used to connect the magnetic ring 33, so as to ensure that the magnetic ring 33 and the detection plate 31 move synchronously; the magnetostrictive sensor 32 is arranged at one end of the support column 35, and the magnetic ring 33 is sleeved on the support column 35 and reciprocates along the length direction of the support column 35.

[0058] In the embodiment of the present invention, the guide shaft 34 and the support column 35 are independently arranged vertically. Figure 3 The guide shaft 34 and the support column 35 shown are respectively arranged vertically on the cylinder cover 40, and at this time, the end of the guide shaft 34 away from the detection plate 31 is connected to the magnetic ring 33 through the magnetic ring connecting plate 36, so as to realize the synchronous movement of the magnetic ring 33 and the detection plate 31. Specifically, one end of the magnetic ring connecting plate 36 is connected to the magnetic ring 33, and the end of the magnetic ring connecting plate 36 away from the magnetic ring 33 is connected to the end of the guide shaft 34 away from the detection plate 31.

[0059] Continue to see Figure 3 As shown, the height measuring device 30 further includes a linear bearing assembly 37 connected and matched with the guide shaft 34 .

[0060] In an embodiment of the present invention, the linear bearing assembly 37 includes a linear bearing seat 371 and a linear bearing 372 mounted on the linear bearing seat 371 , and the linear bearing 372 is used in conjunction with the guide shaft 34 .

[0061] The present invention also provides a method for detecting asphalt fluctuations in asphalt mixtures, the key of which is to measure the fluidity of the asphalt mixture based on the asphalt fluctuation detection device for asphalt mixtures in the present invention, and then determine whether the asphalt content fluctuation meets the requirements.

[0062] The asphalt mixture asphalt fluctuation detection method of the present invention is carried out according to the following steps.

[0063] (1) Preparation of asphalt mixture samples.

[0064] In an embodiment of the present invention, a fixed-grade asphalt mixture sample is prepared, and the prepared sample is placed in an oven at a specified temperature for heat preservation and standby use.

[0065] In an embodiment of the present invention, the forming cylinder and the funnel are placed in an oven at the same temperature for heat preservation and standby use.

[0066] In an embodiment of the present invention, the asphalt mixture may be but is not limited to BBME0-14 asphalt mixture.

[0067] (2) Assemble the forming cylinder on a vibration table.

[0068] In an embodiment of the present invention, the forming cylinder is placed on a vibration table, and the vibration table surface forms the bottom surface of the test cylinder to prevent the asphalt mixture from escaping from the cylinder cavity and is vibrated and formed in the cylinder cavity under subsequent vibration.

[0069] (3) Fill the molding cylinder with the prepared asphalt mixture sample.

[0070] In an embodiment of the present invention, the prepared asphalt mixture sample is added into the forming cylinder using a funnel and is 5 cm to 8 cm higher than the upper edge of the filling cylinder, for example, 5 cm, 6 cm, 7 cm, 8 cm higher than the upper edge of the filling cylinder or any value satisfying the above range.

[0071] (4) Start the vibration table to compact the asphalt mixture sample, and obtain the height H1 of the asphalt mixture sample at this time through the height measuring device.

[0072] In the embodiment of the present invention, the vibration table is started to vibrate for 3s to 5s at a frequency of 60 Hz to compact the sample.

[0073] In some embodiments of the present invention, after compaction, the funnel is removed, and the cylinder cover together with the height measuring device are assembled together with the forming cylinder. At this time, the detection plate abuts against the upper surface of the asphalt mixture sample, and the detection plate also plays a role in keeping the surface of the sample flat, and the height H1 of the sample is measured at this time.

[0074] In some embodiments of the present invention, after compaction, the funnel is removed, and when the height of the molded sample is higher than the upper edge of the filling tube, the excess sample above the upper edge of the filling tube can be scraped off with a steel ruler, and then the height H1 of the sample can be measured by the detection plate.

[0075] (5) The test mold cylinder is disassembled and the vibration table is started again. Under the preset vibration frequency and vibration time T, the asphalt mixture sample is made to flow under the action of vibration. At the same time, the detection plate moves downward synchronously with the sample to obtain the height H2 of the asphalt mixture sample at this time, and the fluidity V of the asphalt mixture is calculated; wherein V = (H1-H2) / T.

[0076] In some embodiments of the present invention, the test mold cylinder is removed, and the vibration table is started to vibrate at a frequency of 60 Hz for a time T of 5 s to obtain the height H2 of the asphalt mixture sample at this time.

[0077] (6) Determine whether the asphalt content fluctuation meets the requirements based on the fluidity V of the asphalt mixture.

[0078] In the embodiment of the present invention, the fluidity-asphalt-stone ratio curve of the asphalt mixture is drawn according to the fluidity and asphalt-stone ratio of the asphalt mixture, see Figure 4 As shown, it can be seen from the curve that when the fluidity of the asphalt mixture is below 1.55 cm / s, the asphalt content fluctuation meets the quality requirements.

[0079] It is worth mentioning that in order to ensure the accuracy of the test data, 3 to 5 parallel tests are carried out under the condition that the sample is kept within a certain temperature range.

[0080] Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The experimental reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the raw materials, instruments and equipment used in the following examples, etc., can all be purchased on the market or can be obtained by existing methods; the amounts of the experimental reagents, unless otherwise specified, are the amounts of reagents used in conventional experimental operations; the experimental methods, unless otherwise specified, are all conventional methods.

[0081] Example 1

[0082] Provides a Figure 1 The asphalt mixture asphalt fluctuation detection device is shown, and the asphalt mixture asphalt fluctuation is detected based on the detection device, and the effectiveness of the detection method in the present invention is verified.

[0083] The asphalt mixture was mixed with the determined BBME0-14 mixture ratio and subjected to vibration fluidity test. The results are as follows: Figure 4 As shown, the average fluidity of three tests at the optimal asphalt content of 5% is 0.71 cm / s, and the fluidity value when the asphalt content fluctuates within a range of plus or minus 0.3% is 1.55 cm / s. Therefore, when the fluidity is below 1.55 cm / s, the asphalt content fluctuation of the asphalt mixture meets the quality requirements.

[0084] The asphalt mixture asphalt fluctuation detection method comprises:

[0085] The prepared asphalt mixture sample is placed in an oven for heat preservation and is used for later use. The forming cylinder 20 and the funnel are kept warm in an oven at the same temperature for later use.

[0086] The sample is added into the filling barrel 21 at once by using a funnel and is 5 cm above the upper edge of the filling barrel 21. The vibration table 10 is started to vibrate at a frequency of 60 Hz for 3 seconds to compact the sample. The funnel is removed and the excess sample above the upper edge of the filling barrel 21 is scraped off with a steel ruler.

[0087] The height measuring device 30 is assembled, and the detection plate 31 is in contact with the upper surface of the molded sample, and the height H1 of the sample at this time is measured.

[0088] Remove the test mold cylinder 22, start the vibration table 10 again, and make it vibrate at a frequency of 60Hz for 5s (T). During the vibration, the detection plate 31 moves downward along with the sample flow. After the vibration is completed, the height H2 of the sample is measured. The fluidity of asphalt mixture V = (H1-H2) / T.

[0089] At the same time, the present invention uses the detection method for the production and construction quality control of PK20-PK60 asphalt base concrete and asphalt surface layer concrete in a highway project. The total amount of asphalt concrete is about 500,000 tons, and the fluidity is tested more than 500 times in total. Some test data are summarized in Table 1 below.

[0090] Table 1 Test data summary

[0091] Construction Date Asphalt Concrete Type H1 H2 Time (T) Fluidity (v) 2020.01.23 BBME 32 28.7 5 0.67 2020.0.1.24 BBME 32 28.5 5 0.7 2020.01.24 BBME 32 28.8 5 0.64 2020.01.28 BBME 32 28.6 5 0.68 2020.01.31 BBME 32 28.8 5 0.65 2020.02.2 BBME 32 28.6 5 0.68 2020.02.03 BBME 32 28.8 5 0.65 2020.02.05 BBME 32 28.7 5 0.67 2020.02.06 BBME 32 28.6 5 0.68 2020.02.07 BBME 32 28.5 5 0.7 2020.02.08 BBME 32 29.0 5 0.61

[0092] It can also be seen from Table 1 that the detection method based on the detection device in the present invention has high accuracy and is easy to operate. When the fluidity of the asphalt mixture is below 1.55 cm / s, it can be determined that the asphalt content fluctuation of the asphalt mixture meets the requirements.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A device for detecting asphalt fluctuations in asphalt mixture, characterized in that: It comprises a device body and a measuring assembly mounted on a vibration table of the device body, wherein the measuring assembly comprises a forming cylinder and a height measuring device assembled with the forming cylinder, and the height measuring device is placed on a side away from the vibration table; The molding cylinder comprises a detachable and connected filling cylinder and a trial mold cylinder, and the trial mold cylinder is placed on a side close to the vibration table; The height measuring device includes a detection plate, which is suspended inside the forming cylinder and moves up and down along the cylinder height direction. The height measuring device is used to monitor the height change of the asphalt mixture in the cylinder to determine whether the fluctuation of its asphalt content meets the requirements.

2. The asphalt mixture asphalt fluctuation detection device according to claim 1, characterized in that: The filling tube and the trial mold tube are independently cylindrical with open ends, and the inner diameter of the filling tube is the same as the inner diameter of the trial mold tube.

3. The asphalt mixture asphalt fluctuation detection device according to claim 1, characterized in that: The height measuring device further comprises a magnetostrictive sensor and a magnetic ring moving synchronously with the detection plate, wherein the magnetostrictive sensor is used for monitoring the position height and / or moving distance of the detection plate in real time.

4. The asphalt mixture asphalt fluctuation detection device according to claim 3, characterized in that: The height measuring device further comprises a guide shaft and a support column, one end of the guide shaft is connected to the detection plate, and the end of the guide shaft away from the detection plate is used to connect to the magnetic ring; The magnetostrictive sensor is arranged at one end of the support column, and the magnetic ring is sleeved on the support column and reciprocates along the length direction of the support column.

5. The asphalt mixture asphalt fluctuation detection device according to claim 4, characterized in that: The height measuring device also includes a magnetic ring connecting plate, one end of which is connected to the magnetic ring, and one end of which is away from the magnetic ring and connected to one end of the guide shaft and away from the detection plate.

6. The asphalt mixture asphalt fluctuation detection device according to claim 4, characterized in that: The height measuring device also includes a linear bearing assembly connected and matched with the guide shaft.

7. The asphalt mixture asphalt fluctuation detection device according to claim 1, characterized in that: The measuring assembly also includes a cylinder cover matched with the forming cylinder, and the cylinder cover is placed on a side away from the vibration table; the detection plate extends into the interior of the forming cylinder through the cylinder cover.

8. The asphalt mixture asphalt fluctuation detection device according to claim 1, characterized in that: The device body also includes a support frame for supporting the measuring component.

9. A method for detecting asphalt fluctuations in asphalt mixture, characterized in that: The detection method is based on the asphalt mixture asphalt fluctuation detection device according to any one of claims 1 to 8; the detection method comprises: Assemble the measuring assembly on the vibration table; Fill the prepared asphalt mixture into the forming cylinder, start the vibration table to vibrate the asphalt mixture into shape, and the detection plate abuts against the upper surface of the asphalt mixture to obtain the height H1 of the asphalt mixture at this time; The test mold cylinder is disassembled, and the vibration table is started again, and the vibration frequency and vibration time T are preset to make the asphalt mixture flow under the vibration, and the detection plate moves downward with the asphalt mixture, and the height H2 of the asphalt mixture at this time is obtained, and the fluidity V of the asphalt mixture is calculated; wherein V = (H1-H2) / T; Whether the asphalt content fluctuation meets the requirements is judged according to the fluidity V of the asphalt mixture.

10. The asphalt mixture asphalt fluctuation detection method according to claim 9, characterized in that: The asphalt mixture includes BBME0-14 asphalt mixture. When the fluidity of the asphalt mixture is below 1.55 cm / s, the fluctuation of asphalt content meets the quality requirements.

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