A composite organic hydraulic pavement slurry infusion testing device and method

Abstract

The invention relates to a composite organic hydraulic pavement slurry infusion testing device, comprising a bracket (1), a main testing mechanism (2), an infusion mechanism (3), a vibration mechanism (4) and a measurement and analysis mechanism (5); the main testing mechanism (2) comprises a test piece table (21), an asphalt mixture test piece (22), a rubber membrane (23), a pressure ring (24), a discharge pipe (25) and a storage tank (27); the infusion mechanism (3) comprises a storage bin (31), and a discharge port (33) at the bottom of the storage bin (31) faces the asphalt mixture test piece (22); the vibration mechanism (4) comprises a vibration motor (43), a vibration plate (44) and a telescopic rod (41) that cooperate with each other; the measurement and analysis mechanism (5) comprises a high-precision electronic scale (51) and a host computer (52) connected to the bottom of the test piece table (21). The invention has the advantages of reasonable structure, simple operation, intuitive test data output, reduced errors in manually measuring the infusion degree, and high practicality.

Description

Technical Field

[0001] The invention relates to the technical field of composite organic hydraulic pavement construction, in particular to a composite organic hydraulic pavement slurry infusion testing device and method. Background Art

[0002] Flexible asphalt pavement is very sensitive to temperature changes. At high temperatures, the viscosity of asphalt materials decreases, which can easily cause damage such as rutting, waves, and bumps. At low temperatures, the stiffness modulus of asphalt materials increases, showing brittleness, which can easily cause asphalt concrete pavement to crack, seriously affecting driving safety. Although rigid cement pavement has the advantages of strong deformation resistance, long service life, and low daily maintenance costs, this type of pavement structure has poor driving comfort and is difficult to repair after the pavement structure is damaged.

[0003] Composite organic hydraulic pavement is between rigid and flexible pavement. It is a new type of pavement material composed of large-void asphalt mixture with a void ratio of 20% to 35% and specially modified cement-based materials. It has the excellent characteristics of both cement pavement and asphalt pavement, and its road performance is more reasonable. The presence of cement paste increases the skeleton component of the material and reduces the relative proportion of asphalt material, thereby reducing the temperature sensitivity of the mixture and improving the bearing capacity of the pavement. It can effectively solve the problems of rutting, water damage and cracking of flexible asphalt pavement and extend the service life of the pavement.

[0004] In composite organic hydraulic pavement, cement paste with high fluidity is generally poured into the asphalt pavement through a large number of interconnected pores in the asphalt mixture. Therefore, the degree of cement paste pouring, that is, the ratio of cement paste to cement grouting asphalt mixture, largely determines the road performance of composite organic hydraulic pavement, and is also extremely critical to the engineering cost in actual engineering.

[0005] In recent years, there have been more and more studies on the penetration of composite organic hydraulic pavement slurry, but most of them are obtained by manual measurement afterwards, and it is impossible to monitor the penetration in real time during the slurry injection process. At present, there is no device for testing the penetration of composite organic hydraulic pavement slurry in the field of road engineering. Therefore, it is of great practical significance to design a device for testing the penetration of composite organic hydraulic pavement slurry. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the penetration degree of the existing composite organic hydraulic pavement slurry cannot be monitored in real time and there is no specific equipment for effective measurement. A composite organic hydraulic pavement slurry penetration test device is provided, which can record the slurry penetration degree during the composite organic hydraulic pavement grouting process in real time, reduce the error existing in the manual measurement of the penetration degree, and has high practicality.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A composite organic hydraulic pavement slurry infusion testing device comprises a bracket, on which a main body testing mechanism, an infusion mechanism, a vibration mechanism and a measurement and analysis mechanism are respectively arranged.

[0009] The main testing mechanism is arranged in the middle of the bracket, and includes a test piece table, an asphalt mixture test piece, a rubber membrane, a pressure ring, a discharge pipe and a storage tank. The test piece table is a cylindrical structure, and the asphalt mixture test piece is arranged in the test piece table, and a layer of rubber membrane is connected to the outer wall higher than the test piece table to seal the side of the test piece and prevent the slurry from leaking out.

[0010] A pressure ring matching with the asphalt mixture specimen is sleeved on the upper end thereof, and the pressure ring includes a pair of semicircular valve seats, and the two valve seats are connected by clamping rings at both ends thereof, and the asphalt mixture specimen is fixed between the two valve seats, and the side wall of the pressure ring is higher than the top of the asphalt mixture specimen, so as to prevent the slurry from flowing outward when being poured into the specimen;

[0011] A discharge pipe is connected to the bottom of the test bench, and the discharge pipe is horizontally arranged on the side of the test bench. A valve is provided on the discharge pipe to discharge cement slurry seeping from the asphalt mixture in the test bench and control the opening and closing of the connection through the valve;

[0012] The storage tank is connected to the bracket below the discharge pipe and is arranged opposite to the outlet of the discharge pipe to store the slurry flowing out of the test piece table.

[0013] The pouring mechanism is arranged at the upper part of the bracket, and includes a storage bin, a circular feed port is arranged at the top of the storage bin, and a funnel-shaped discharge port is arranged at the bottom, the discharge port is directly opposite to the upper part of the asphalt mixture specimen of the main testing mechanism, and a rotary valve is connected thereto to control the opening and closing of the discharge port and adjust the pouring speed of the cement slurry;

[0014] A stirrer is provided in the storage bin, which is connected to the top of the storage bin through a vertical connecting rod to stir the cement slurry in the storage bin, improve the uniformity of the cement slurry, and prevent the cement slurry from losing fluidity after hardening and agglomeration.

[0015] The vibration mechanism is arranged on one side of the main test mechanism, and includes a vibration motor, a vibration plate and a horizontal telescopic rod. One end of the telescopic rod is connected to the bracket and the other end is connected to a motor seat. The vibration motor is fixed on the motor seat. One side of the motor seat is connected to the vibration plate. The vibration plate is semicircular in shape, and its curvature is the same as that of the asphalt mixture specimen and is connected to one side of the asphalt mixture specimen to apply vibration to the asphalt mixture specimen.

[0016] The measurement and analysis mechanism is arranged below the main testing mechanism, and includes a high-precision electronic scale and a host computer. The high-precision electronic scale is connected to the bottom of the specimen table, and is communicated with the host computer through a signal transmission line, so as to calculate the slurry penetration degree of the asphalt mixture specimen according to the specimen mass change obtained by the high-precision electronic scale and display it in real time.

[0017] Furthermore, the bracket includes a base, on which a group of vertical support rods are fixed, and a group of horizontal bars that can slide up and down are connected between the support rods. The high-precision electronic scale of the measurement and analysis mechanism and the material storage tank of the main test mechanism are both arranged on the base.

[0018] Furthermore, the storage bin of the pouring mechanism is connected to the crossbar of the bracket to facilitate the up and down movement of the storage bin, the installation of the test piece and the pouring of cement slurry.

[0019] Furthermore, the vibration frequency of the vibration motor is adjustable to meet different needs.

[0020] Furthermore, three gaskets are provided on the discharge port of the injection mechanism, and the pore sizes and pore densities of the gaskets are different. The gaskets are connected to the rotary valve, so that the type of the gaskets can be adjusted by rotating the rotary valve, thereby adjusting the injection speed of the cement slurry.

[0021] Furthermore, the telescopic rod of the vibration mechanism is movably connected to the support rod of the bracket, so that the telescopic rod can slide up and down along the support rod, thereby adjusting the height of the vibration mechanism.

[0022] In order to further achieve the purpose of the present invention, a composite organic hydraulic pavement slurry infusion test method is also provided. The device used includes a main testing mechanism, an infusion mechanism, a vibration mechanism and a measurement and analysis mechanism. The specific steps are as follows, including:

[0023] (1) Set the high-precision electronic scale to zero, then place the asphalt mixture specimen on the specimen table. The high-precision electronic scale records the mass m0 of the specimen at this time and sends the data to the host computer;

[0024] (2) Put a rubber film on the side of the asphalt mixture specimen, insert the two semicircular ring valve seats of the pressure ring into the top of the asphalt mixture specimen, and buckle the clamping ring;

[0025] (3) Adjust the vibration mechanism to a suitable height and adjust the length of the telescopic rod so that the vibration plate contacts the side of the asphalt mixture specimen. The high-precision electronic scale records the mass m1 of the specimen at this time and sends it to the host computer;

[0026] (4) Pour cement slurry into the storage bin from the feed port, adjust the filling mechanism to an appropriate height, open the discharge port and start grouting. After grouting, a high-precision electronic scale records the mass m2 of the specimen at this time and sends it to the host computer;

[0027] (5) Turn on the vibration motor to apply vibration to the asphalt mixture specimen;

[0028] (6) When the slurry filling degree is too high, the valve on the discharge pipe can be opened to discharge part of the slurry to reduce the filling degree;

[0029] (7) The host computer calculates the specific penetration degree of the asphalt mixture specimen through the slurry penetration degree g = (m2-m1) / (m0+m2-m1).

[0030] In the technical solution of the present invention, the precise measurement of the penetration degree of the composite organic water-hardening pavement slurry is completed through the coordinated work of various mechanisms. The vibration plate can transmit the vibration force generated by the vibration motor to the test piece, promote the flow of cement slurry in the asphalt mixture, and quickly fill the connected pores in the asphalt mixture, so that it is more evenly distributed in the asphalt mixture, and at the same time can reduce the bubbles in the cement slurry; in addition, the metering and analysis mechanism adopts a high-precision electronic scale and is connected to the host computer, which can measure and record the mass change of the asphalt mixture specimen in real time, so as to calculate the penetration degree of the slurry; a discharge pipe connected to the specimen table is used to discharge the cement slurry in the specimen, so as to adjust the slurry penetration degree of the specimen and realize controllable slurry penetration degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of a composite organic hydraulic pavement slurry infusion testing device of the present invention;

[0032] Figure 2 It is a schematic diagram of the compression ring structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of a gasket of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the gasket 2 of the present invention;

[0035] Figure 5 It is a schematic diagram of the third structure of the gasket of the present invention;

[0036] Figure 6 It is a three-dimensional structural diagram of the vibration mechanism of the present invention. DETAILED DESCRIPTION

[0037] Example 1

[0038] To make the present invention more clear, a composite organic hydraulic pavement slurry penetration testing device and method of the present invention are further described below in conjunction with the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] See also Figure 1 A composite organic hydraulic pavement slurry infusion testing device, characterized by comprising:

[0040] a. The bracket 1 comprises a base 11 on which a pair of vertical support rods 12 are fixed, and each support rod 12 is connected to a horizontal rod 13 that can slide up and down.

[0041] b. The main testing mechanism 2 is arranged in the middle of the support 1, and includes a test piece table 21, an asphalt mixture test piece 22, a rubber membrane 23, a pressure ring 24, a discharge pipe 25 and a storage tank 27. The test piece table 21 is a cylinder, with a solid round block at the bottom, a hollow interior, and a side wall with a certain height. The asphalt mixture test piece 22 is arranged in the test piece table 21, and a rubber membrane 23 is connected to the outer wall thereof which is higher than the test piece table 21, so as to seal the side of the test piece and prevent the slurry from leaking out;

[0042] See also Figure 1 , Figure 2 The upper end of the asphalt mixture specimen 22 is sleeved with a pressure ring 24 that matches with it. The pressure ring 24 includes a pair of semicircular valve seats 24a. The two valve seats 24a are connected by clamping rings 24b at both ends. The asphalt mixture specimen 22 is fixed between the two valve seats 24a, and the side wall of the pressure ring 24 is higher than the top of the asphalt mixture specimen 22, so as to prevent the slurry from flowing outward when pouring into the specimen;

[0043] See also Figure 1 The bottom of the test bench 21 is connected to a discharging pipe 25 which is arranged horizontally on the side of the test bench 21 and communicates with the inside of the test bench 21. A valve 26 is provided on the discharging pipe 25 to discharge cement slurry which seeps out of the asphalt mixture in the test bench and control the opening and closing of the connection through the valve.

[0044] The storage tank 27 is connected to the base 11 of the support 1 and is arranged opposite to the outlet of the discharge pipe 25 to store the slurry flowing out of the test piece table.

[0045] c. The pouring mechanism 3 is arranged at the upper part of the bracket 1, and includes a rectangular storage bin 31, which is connected between the two cross bars 13, and the top of the storage bin 31 is provided with a circular feed port 32, and the bottom is provided with a funnel-shaped discharge port 33, and the discharge port 32 is directly facing the upper part of the asphalt mixture specimen 22 of the main test mechanism 2;

[0046] See also Figure 1 , Figure 3~Figure 5 , three gaskets 36 are provided on the discharge port 33, the pore sizes and pore densities of the gaskets 36 are different, and the gaskets 36 are connected to the rotary valve 34, so that the type of the gaskets can be adjusted by rotating the rotary valve 34, thereby adjusting the pouring speed of the cement slurry;

[0047] A stirrer 35 is provided in the storage bin 31, and the stirrer 35 is connected to the top of the storage bin 31 through a vertical connecting rod 37, so as to stir the cement slurry in the storage bin, improve the uniformity of the cement slurry, and prevent the cement slurry from losing fluidity after hardening and agglomeration.

[0048] d. The vibration mechanism 4 is disposed on one side of the main test mechanism 2, and includes a vibration motor 43, a vibration plate 44 and a horizontal telescopic rod 41. One end of the telescopic rod 41 is movably connected to the support rod 12 of the bracket 1, and the other end is connected to a motor seat 42. The vibration motor 43 is fixed to the motor seat 42. One side of the motor seat 42 is connected to the vibration plate 44. The vibration plate 44 is semicircular, and its curvature is the same as that of the asphalt mixture specimen 22. It is connected to the rubber membrane 23 on one side of the asphalt mixture specimen 22, so as to apply vibration to the asphalt mixture specimen;

[0049] The vibration frequency of the vibration motor 43 is adjustable to meet different requirements.

[0050] e. The measurement and analysis mechanism 5 is arranged below the main test mechanism 2, and includes a high-precision electronic scale 51 and a host computer 52. The high-precision electronic scale 51 is connected to the bottom of the specimen table 21, and its bottom is fixed on the base 11 of the bracket 1. The high-precision electronic scale 51 is communicated with the host computer 52 through a signal transmission line 53, so as to calculate the slurry injection degree of the asphalt mixture specimen according to the specimen mass change obtained by the high-precision electronic scale and display it in real time.

[0051] The length of the telescopic rod 41 can be adjusted by stretching or retracting it.

[0052] The pouring mechanism 3 can move up and down as the cross bar 13 slides on the support rod 12 , and the vibration mechanism 4 can also slide up and down along the support rod 12 as the telescopic rod 41 slides.

[0053] When the device of the present invention is used to test the penetration of composite organic hydraulic pavement slurry, the specific steps are as follows:

[0054] (1) First, the high-precision electronic scale 51 is set to zero, and then the asphalt mixture specimen 22 is placed on the specimen table 21. The high-precision electronic scale 51 records the mass m0 of the specimen at this time and sends the data to the host computer 52;

[0055] (2) Putting a rubber film 23 on the side of the asphalt mixture specimen 22;

[0056] (3) Insert the two semicircular valve seats 24a of the pressure ring 24 into the top of the asphalt mixture specimen 22, and fasten the clamping ring 24b;

[0057] (4) The vibration mechanism 4 is adjusted to a suitable height and fixed by sliding the telescopic rod 41 on the support rod 12, and then the length of the telescopic rod 41 is adjusted so that the vibration plate 44 contacts the side of the asphalt mixture specimen 22. The high-precision electronic scale 51 records the mass m1 of the specimen at this time and sends it to the host computer 52;

[0058] (5) Pour cement paste into the storage bin 31 from the feed port 32, adjust the injection mechanism 3 to an appropriate height by sliding between the cross bar 13 and the support bar 12, open the discharge port 33 and start grouting. After grouting, the high-precision electronic scale 51 records the mass m2 of the specimen at this time and sends it to the host computer 52. During the grouting process, the injection speed of the slurry can be adjusted by rotating the rotary valve 34;

[0059] (6) According to actual needs, the vibration motor 43 is turned on and adjusted to a suitable frequency. The vibration motor 43 transmits the vibration force to the asphalt mixture specimen 22 through the vibration plate 44, thereby applying a vibration effect to the asphalt mixture specimen 22;

[0060] (7) When the slurry filling degree is too high, the valve 26 on the discharge pipe 25 at the lower part of the specimen table 21 can be opened to discharge part of the slurry into the storage tank 27 to reduce the filling degree;

[0061] (8) The upper computer 52 obtains the specific penetration degree through the asphalt mixture specimen slurry penetration calculation formula, which is as follows:

[0062] g=(m2- m1) / (m0+ m2- m1)

[0063] Among them, m0 represents the initial mass of the asphalt mixture specimen, m1 represents the mass on the specimen table before grouting, and m2 represents the mass on the specimen table after grouting.

[0064] The testing device of the present invention has a compact structure, is easy to assemble, is simple to operate, and has intuitive and convenient test data output. It can be used to measure the slurry penetration during the composite organic hydraulic pavement grouting process, and can also be used to weigh composite organic hydraulic pavement test pieces with a certain target penetration degree.

[0065] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A composite organic hydraulic pavement slurry penetration test device, characterized in that: It comprises a bracket (1), on which a main body testing mechanism (2), a pouring mechanism (3), a vibration mechanism (4) and a measurement and analysis mechanism (5) are respectively provided; The main testing mechanism (2) is arranged in the middle of the support (1), and comprises a test piece platform (21), an asphalt mixture test piece (22), a rubber membrane (23), a pressure ring (24), a discharge pipe (25) and a storage tank (27). The test piece platform (21) is a cylindrical structure. The asphalt mixture test piece (22) is arranged in the test piece platform (21), and a layer of rubber membrane (23) is connected to the outer wall of the test piece platform (21) higher than the test piece platform (21). A pressure ring (24) matching with the asphalt mixture test piece (22) is sleeved on the upper end of the asphalt mixture test piece (22). The pressure ring (24) comprises a pair of semicircular valve seats (24a), the two valve seats (24a) are connected by clamping rings (24b) at both ends thereof, the asphalt mixture specimen (22) is fixed between the two valve seats (24a), and the side wall of the pressure ring (24) is higher than the top of the asphalt mixture specimen (22), the bottom of the specimen platform (21) is connected to a discharge pipe (25), the discharge pipe (25) is provided with a valve (26), and the bracket (1) facing the outlet of the discharge pipe (25) is connected to a storage tank (27); The pouring mechanism (3) is arranged at the upper part of the support (1), and comprises a storage bin (31). The top of the storage bin (31) is provided with a feed port (32), the middle is connected to a stirrer (35), and the bottom is provided with a discharge port (33). The discharge port (33) faces the top of the asphalt mixture test piece (22) and is connected to a rotary valve (34). Three gaskets (36) are provided on the discharge port (33) of the filling mechanism (3), the pore sizes and pore densities of the gaskets (36) are different, and the gaskets (36) are connected to the rotary valve (34); The vibration mechanism (4) is arranged on one side of the main testing mechanism (2), and comprises a vibration motor (43), a vibration plate (44) and a telescopic rod (41); the vibration frequency of the vibration motor (43) is adjustable; one end of the telescopic rod (41) is connected to the bracket (1), and the other end is connected to a motor seat (42); the vibration motor (43) is fixed to the motor seat (42); one side of the motor seat (42) is connected to the vibration plate (44), and the vibration plate (44) is connected to the rubber membrane (23); The measurement and analysis mechanism (5) is arranged below the main testing mechanism (2), and comprises a high-precision electronic scale (51) and a host computer (52). The high-precision electronic scale (51) is connected to the bottom of the test piece table (21) and is in communication connection with the host computer (52).

2. The composite organic hydraulic pavement slurry penetration test device according to claim 1, characterized in that: The support (1) comprises a base (11), a group of vertical support rods (12) are fixed on the base (11), a group of horizontal rods (13) that can slide up and down are connected between the support rods (12), and a high-precision electronic scale (51) of the measurement and analysis mechanism (5) and a material storage tank (27) of the main test mechanism (2) are both arranged on the base (11).

3. The composite organic hydraulic pavement slurry penetration test device according to claim 2, characterized in that: The material storage bin (31) of the filling mechanism (3) is slidably connected to the crossbar (13) of the bracket (1).

4. The composite organic hydraulic pavement slurry penetration test device according to claim 2, characterized in that: The telescopic rod (41) of the vibration mechanism (4) is movably connected to the support rod (12) of the bracket (1).

5. A method for testing the penetration of composite organic hydraulic pavement slurry using the device according to any one of claims 1 to 4, wherein the specific steps are as follows, characterized in that: include: Step 1: Set the high-precision electronic scale to zero, then place the asphalt mixture specimen in the specimen table. The high-precision electronic scale records the mass m0 of the specimen at this time and sends it to the host computer; Step 2: Put a rubber film on the side of the asphalt mixture specimen, and put the two semicircular ring valve seats of the pressure ring into the top of the asphalt mixture specimen, and buckle the clamping ring; Step 3: Adjust the vibration mechanism to a suitable height, adjust the length of the telescopic rod, make the vibration plate contact the side of the asphalt mixture specimen, and the high-precision electronic scale records the mass m1 of the specimen at this time and sends it to the host computer; Step 4: Pour the cement slurry into the storage bin, adjust the filling mechanism to an appropriate height, open the discharge port and start grouting. After grouting, a high-precision electronic scale records the mass m2 of the specimen at this time and sends it to the host computer; Step 5: Turn on the vibration motor to apply vibration to the asphalt mixture specimen; Step 6: When the slurry filling degree is too high, open the valve on the discharge pipe to discharge part of the slurry to reduce the filling degree; Step 7: The host computer calculates the specific penetration degree through the asphalt mixture specimen slurry penetration degree g= (m2-m1) / (m0+m2-m1).

6. The composite organic hydraulic pavement slurry penetration test method according to claim 5, characterized in that: In step 4, the grouting speed of the slurry can be adjusted by rotating the rotary valve during the grouting process.

7. The composite organic hydraulic pavement slurry penetration test method according to claim 5, characterized in that: In the step five, the vibration motor is adjusted to a suitable frequency according to actual needs to apply vibration to the asphalt mixture specimen.

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