CN115774095A - Rapid testing device and method for maintenance age of waterborne polymer stabilized macadam - Google Patents
Rapid testing device and method for maintenance age of waterborne polymer stabilized macadam Download PDFInfo
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- CN115774095A CN115774095A CN202211599284.1A CN202211599284A CN115774095A CN 115774095 A CN115774095 A CN 115774095A CN 202211599284 A CN202211599284 A CN 202211599284A CN 115774095 A CN115774095 A CN 115774095A
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Abstract
The invention discloses a device and a method for quickly testing the maintenance age of waterborne polymer stabilized macadam, and the device comprises a base, a switch door and an installation cylinder, wherein a test box is installed at the top of the base, a test chamber is arranged on the front side of the test box, the switch door is movably installed on the front side of the test chamber through a hinge, an installation plate is installed inside the test chamber through bolts, high-precision weighing sensors are symmetrically installed at the top of the installation plate, a connecting spring is installed inside the installation cylinder, and a movable plate is installed at the top end of the installation cylinder through the connecting spring. The device provided by the invention can simulate the actual conditions of a construction site, has the function of comprehensively determining the maintenance age, provides three testing methods (unconfined compressive strength, water content and relative curing degree) to determine the shortest time of the standard maintenance age of the waterborne polymer stabilized macadam, and can select a proper method to determine the age of the waterborne polymer stabilized macadam according to specific engineering conditions.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a device and a method for quickly testing the maintenance age of water-based polymer stabilized macadam.
Background
The water-based polymer stabilized macadam is a novel green flexible base material, mainly comprises macadam materials with different grain diameters and a water-based polymer cementing material, the water-based polymer stabilized macadam material has good strength performance, water stability and fatigue resistance, overcomes the problem of poor shrinkage and crack resistance of the traditional cement stabilized macadam material, and effectively slows down the generation of reflection cracks, so that the service life of an asphalt pavement (generally more than 35 years) can be obviously prolonged.
A large number of indoor tests need to be carried out in the existing cement stabilized macadam material design, test pieces with different ages (7 d, 14d, 22d and 28 d) are prepared, for the water-based polymer stabilized macadam, as moisture preservation and temperature control are not needed in the maintenance process, the existing maintenance equipment cannot meet the design requirement of quick maintenance, a large amount of time and material cost are consumed in the traditional material design process, the traditional material design process is neither economical nor environment-friendly, and the construction progress of a base layer is delayed.
Therefore, in combination with the curing and maintenance characteristics of the waterborne polymer, it is urgently needed to develop a device and a method for quickly testing the maintenance age of the waterborne polymer stabilized macadam so as to quickly and accurately design the material of the waterborne polymer stabilized macadam and determine the optimal maintenance condition of the waterborne polymer stabilized macadam.
Disclosure of Invention
The invention aims to provide a device and a method for quickly testing the maintenance age of water-based polymer stabilized macadam, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the rapid testing device for the maintenance age of the waterborne polymer stabilized macadam comprises a base, a switch door and an installation cylinder, wherein a testing box is installed at the top of the base, a testing chamber is formed in the front of the testing box, and the switch door is movably installed on the front of the testing chamber through a hinge;
the mounting panel is installed through the bolt in the inside of test room, high accuracy weighing sensor is installed to the top symmetry of mounting panel, the internally mounted of installation section of thick bamboo has connecting spring, the fly leaf is installed through connecting spring on the top of installation section of thick bamboo.
Preferably, the control box is installed at the top of base, and the control box is located one side of test box, and the data processing end is installed through the bolt in the front of control box, and controlling means is located the top of data processing end.
Preferably, a heating and humidity regulator is installed on the inner wall of the top of the test chamber, and a temperature sensor and a humidity sensor are installed on the inner wall of the back of the test chamber through bolts.
Preferably, an observation window is installed on one side of the opening and closing door in a penetrating mode.
Preferably, the top of the weighing tray is provided with a water-based polymer stabilized macadam test piece body, the outer side of the water-based polymer stabilized macadam test piece body is provided with a dielectric constant sensor, and the dielectric constant sensor is composed of two long electrodes with opposite polarities and is respectively positioned at the top and the bottom of the water-based polymer stabilized macadam test piece body.
Preferably, a top plate is mounted at the top end of the movable plate.
Preferably, the top of the weighing tray is provided with a water-based polymer stabilized macadam test piece body, the outer side of the water-based polymer stabilized macadam test piece body is provided with a dielectric constant sensor, and the dielectric constant sensor is composed of two long electrodes with opposite polarities and is respectively positioned at the top and the bottom of the water-based polymer stabilized macadam test piece body.
The test method is as follows:
s1, selecting raw materials: the single-stage limestone broken stone is adopted as aggregate, and a water-based polymer for road is adopted as polymer binder, and the aggregate and the polymer are mixed to prepare the water-based polymer stabilized broken stone test piece.
S2, sample preparation: and forming a test piece by adopting a rotary compaction method, and sticking two long electrodes of the dielectric constant sensor to two ends of the water-based polymer stabilized macadam test piece body.
S3, maintenance conditions: the water-based polymer stabilized macadam test piece body is placed on a weighing tray in a test box, the control device adjusts the temperature and the humidity in the test box to expected values through control, the water-based polymer stabilized macadam test piece is maintained for seven days, and two sets of comparison experiments are adopted, so that the influence rule of the temperature and the humidity on the water-based polymer stabilized macadam maintenance process is analyzed.
S4, testing results: and calculating data acquired by the dielectric constant sensor, determining a dissipation factor of the data, and thus obtaining the relative maintenance state of the polymer in the water-based polymer stabilized macadam test piece body.
S5, standard maintenance age: the water-based polymer stabilized macadam test piece body of the microcomputer controlled electronic universal testing machine is used for carrying out a compressive strength test, after the test piece is cured in the device, the test piece is taken out for carrying out an unconfined compressive strength test, the minimum time required when the unconfined compressive strength reaches MPa is taken as a standard curing age,
s6, fast pre-estimating a model: by testing the change of the relative curing degree of the test piece under different humidity and temperature conditions, a rapid estimation model for determining the standard curing age can be established.
Compared with the prior art, the invention has the beneficial effects that:
1. the device provided by the invention can simulate the actual conditions of a construction site, has the function of comprehensively measuring the maintenance age, provides three testing methods (unconfined compressive strength, water content and relative curing degree) to determine the shortest time of the standard maintenance age of the waterborne polymer stabilized macadam, and can select a proper method to measure the age of the waterborne polymer stabilized macadam according to specific engineering conditions.
2. The invention provides a rapid estimation method for determining the standard maintenance age, greatly facilitates the engineering application and rapid construction of the waterborne polymer stabilized macadam, and has certain scientific research and engineering practical value.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic diagram of a mounting plate structure according to the present invention;
FIG. 4 is a schematic view of the mounting barrel of the present invention;
FIG. 5 is a flow chart of a standard maintenance age test and a quick prediction of the waterborne polymer stabilized macadam of the present invention;
FIG. 6 is a graph of dissipation factor versus time for a dielectric measurement sensor of the present invention;
FIG. 7 shows unconfined compressive strength R of the present invention c And relative degree of solidification S d A relationship diagram of (1);
FIG. 8 is a graph of relative cure rates at various temperatures with a humidity of 20% in accordance with the present invention;
FIG. 9 is a graph of relative cure rates for different humidities at a temperature of 50 ℃ in accordance with the present invention.
In the figure: 1. a base; 101. a control box; 102. a data processing terminal; 103. a control device; 2. a test box; 201. a test chamber; 202. a heating and humidity regulator; 203. temperature and humidity sensors; 3. opening and closing the door; 301. an observation window; 4. mounting a plate; 401. a high-precision weighing sensor; 402. a weighing tray; 5. mounting the cylinder; 501. a connecting spring; 502. a movable plate; 503. a top plate; 6. the water-based polymer stabilized macadam test piece body; 601. a dielectric constant sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the first embodiment, please refer to fig. 1-2, an embodiment of the present invention: a device for quickly testing the maintenance age of the waterborne polymer stabilized macadam;
the device comprises a base 1, a test box 2 and a switch door 3, wherein the test box 2 is installed at the top of the base 1, a control box 101 is installed at the top of the base 1, the control box 101 is positioned at one side of the test box 2, a data processing end 102 is installed on the front surface of the control box 101 through a bolt, a control device 103 is installed on the front surface of the control box 101 through a bolt, the control device 103 is positioned above the data processing end 102, a test chamber 201 is arranged on the front surface of the test box 2, a heating and humidity regulator 202 is installed on the inner wall of the top of the test chamber 201, a temperature and humidity sensor 203 is installed on the inner wall of the back surface of the test chamber 201 through a bolt, the switch door 3 is movably installed on the front surface of the test chamber 201 through a hinge, an observation window 301 is installed on one side of the switch door 3 in a penetrating manner, and the prepared waterborne polymer stabilized macadam test piece body 6 is placed on a weighing tray 402, the temperature and the humidity in the test box 2 are monitored in real time through the control device 103, the temperature and humidity environment parameter setting in the maintenance process of the water-based polymer stabilized macadam test piece body 6 is controlled, the data processing end 102 can analyze and calculate the mass change monitored by the high-precision weighing sensor 401 and can also analyze and calculate the capacitance change monitored by the dielectric constant sensor 601, so that the maintenance process of the water-based polymer stabilized macadam test piece body 6 is monitored, the heating and humidity regulator 202 heats and humidifies the water-based polymer stabilized macadam test piece body 6 in the maintenance process after the temperature and humidity parameters are set through the control device 103, the temperature control range of the matched environment box is 0-200 ℃, and the temperature control precision is +/-0.5 ℃; the humidity is controlled between 0 percent and 60 percent.
In a second embodiment, please refer to fig. 3 and fig. 4, an embodiment of the present invention: a device for quickly testing the maintenance age of the waterborne polymer stabilized macadam;
including mounting panel 4, installation cylinder 5 and waterborne polymer stabilized macadam test piece body 6, mounting panel 4 is installed through the bolt in the inside of test room 201, high accuracy weighing sensor 401 is installed to the top symmetry of mounting panel 4, waterborne polymer stabilized macadam test piece body 6 is installed to the top of weighing tray 402, dielectric constant sensor 601 is installed to the outside of waterborne polymer stabilized macadam test piece body 6, and dielectric constant sensor 601 comprises two opposite polarity long electrodes, be located the top and the bottom of waterborne polymer stabilized macadam test piece body 6 respectively, the internally mounted of installation cylinder 5 has connecting spring 501, the top of installation cylinder 5 is installed movable plate 502 through connecting spring 501, roof 503 is installed on the top of movable plate 502, waterborne polymer stabilized macadam test piece body 6 is installed to the top of weighing tray 402, dielectric constant sensor 601 is installed to the outside of waterborne polymer stabilized macadam test piece body 6, and dielectric constant sensor 601 comprises two opposite polarity long electrodes, be located the top and the bottom of waterborne polymer stabilized macadam test piece body 6 respectively, high accuracy weighing sensor 401 is located the below of weighing tray 402, monitor the quality on the weighing tray 402, and can carry out analysis according to the change of its quality, thereby it realizes that waterborne polymer stabilized macadam test piece body is connected the maintenance of waterborne polymer and is provided more the waterborne polymer stabilized macadam pressure of waterborne polymer stabilized macadam test piece 6 through the process.
Example three, please refer to fig. 5-9 for a method for rapidly testing the maintenance age of waterborne polymer stabilized macadam:
s1, selecting raw materials: the water-based polymer stabilized macadam test piece is prepared by mixing single-grade limestone macadam with the grain diameter of 4.75-9.5 mm as an aggregate and a water-based polymer for roads as a polymer binder.
S2, sample preparation: forming a test piece by adopting a rotary compaction method, and sticking two long electrodes of a dielectric constant sensor 601 to two ends of a water-based polymer stabilized macadam test piece body 6, wherein the size of the test piece is phi 150mm multiplied by h150mm, the water content is 5.6%, and the compaction degree is 98%; a rotary compaction method is adopted to mold a test piece under the room temperature (25 ℃), the compaction height is 150mm, and the rotary compaction frequency is 150 times.
S3, curing conditions: the water-based polymer stabilized macadam test piece body 6 is placed on a weighing tray 402 in a test box 2, the control device 103 adjusts the temperature and the humidity in the test box 2 to expected values through control, the water-based polymer stabilized macadam test piece is maintained for seven days, two groups of comparison experiments are adopted, the influence rule of the temperature and the humidity on the maintenance process of the water-based polymer stabilized macadam is analyzed, the phase of impregnating materials in an alternating current excitation circuit of two long electrodes is changed, and when the phase of the impregnating materials is changed, the capacitance of the materials is also changed.
S4, testing results: and calculating the data acquired by the dielectric constant sensor 601, determining the dissipation factor of the data, thereby obtaining the relative maintenance state of the polymer in the water-based polymer stabilized macadam test piece body 6, performing machine measurement on the dehydration condition of the water-based polymer stabilized macadam test piece body 6 by adopting the high-precision weighing sensor 401, and if the quality does not change any more, indicating that the water-based polymer stabilized macadam is completely dehydrated, so that the final age is reached.
S5, standard maintenance age: the water-based polymer stabilized macadam test piece body 6 of the microcomputer-controlled electronic universal testing machine is used for carrying out a compressive strength test, after the test piece is cured in the device, the test piece is taken out for carrying out an unconfined compressive strength test, and the minimum time required when the unconfined compressive strength reaches 5MPa is taken as a standard curing age.
S6, fast pre-estimating a model: by testing the change of the relative curing degree of the test piece under different humidity and temperature conditions, a rapid estimation model for determining the standard curing age can be established.
Example four,
In this example, two sets of comparative tests are used to analyze the law of the influence of temperature and humidity on the maintenance process of the waterborne polymer stabilized macadam. Wherein, a group of tests are carried out under the condition of 20 percent of humidity, and the test pieces are respectively maintained under the conditions of 4 different temperatures (25 ℃, 50 ℃, 75 ℃ and 100 ℃); another set of tests was carried out at a temperature of 50 ℃ and the test pieces were cured with 5 humidities (10%, 20%, 30%, 40%, 50%) respectively.
The working principle is as follows: before the device is used, whether the device affects the use or not is checked firstly, the prepared water-based polymer stabilized macadam test piece body 6 is placed on a weighing tray 402 firstly, the temperature and the humidity in a test box 2 are monitored in real time through a control device 103, the temperature and humidity environment parameter setting in the maintenance process of the water-based polymer stabilized macadam test piece body 6 is controlled, a data processing end 102 can analyze and calculate the mass change monitored by a high-precision weighing sensor 401 and also can analyze and calculate the capacitance change monitored by a dielectric constant sensor 601, the maintenance process of the water-based polymer stabilized macadam test piece body 6 is monitored, the high-precision weighing sensor 401 is located below the weighing tray 402, the mass on the weighing tray 402 is monitored, the water content of the high-precision weighing sensor can be analyzed and calculated according to the mass change, and the maintenance process of the water-based polymer stabilized macadam test piece body 6 is monitored.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (8)
1. Quick testing arrangement of rubble maintenance age is stabilized to waterborne polymer, including base (1), switch door (3) and installation section of thick bamboo (5), its characterized in that: the testing box (2) is installed at the top of the base (1), a testing chamber (201) is arranged on the front surface of the testing box (2), and a switch door (3) is movably installed on the front surface of the testing chamber (201) through a hinge;
mounting panel (4) are installed through the bolt to the inside of test room (201), high accuracy weighing sensor (401) are installed to the top symmetry of mounting panel (4), the internally mounted of installation section of thick bamboo (5) has coupling spring (501), fly leaf (502) are installed through coupling spring (501) in the top of installation section of thick bamboo (5).
2. The rapid test device for the maintenance age of waterborne polymer stabilized macadam according to claim 1, wherein: control box (101) are installed at the top of base (1), and control box (101) are located one side of test box (2), and data processing end (102) are installed through the bolt in the front of control box (101), and controlling means (103) are located the top of data processing end (102).
3. The rapid test device for the maintenance age of waterborne polymer stabilized macadam according to claim 1, wherein: the heating and humidity regulator (202) is installed on the inner wall of the top of the testing chamber (201), and the temperature and humidity sensor (203) is installed on the inner wall of the back of the testing chamber (201) through bolts.
4. The rapid test device for maintenance age of waterborne polymer stabilized macadam according to claim 1, wherein: and an observation window (301) is arranged on one side of the switch door (3) in a penetrating way.
5. The rapid test device for the maintenance age of waterborne polymer stabilized macadam according to claim 1, wherein: the top of mounting panel (4) is through high accuracy weighing sensor (401) install weighing tray (402).
6. The rapid test device for the maintenance age of waterborne polymer stabilized macadam according to claim 1, wherein: the top end of the movable plate (502) is provided with a top plate (503).
7. The rapid test device for maintenance age of waterborne polymer stabilized macadam according to claim 5, wherein: the top of weighing tray (402) is installed waterborne polymer stabilized macadam test piece body (6), and dielectric constant sensor (601) is installed in the outside of waterborne polymer stabilized macadam test piece body (6), and dielectric constant sensor (601) comprises two opposite polarity's long electrode, is located the top and the bottom of waterborne polymer stabilized macadam test piece body (6) respectively.
8. The method for testing the rapid maintenance age test device for waterborne polymer stabilized macadam according to any one of claims 1 to 7, wherein: the test method is as follows:
s1, selecting raw materials: the single-stage limestone broken stone is adopted as aggregate, and a water-based polymer for road is adopted as polymer binder, and the aggregate and the polymer are mixed to prepare the water-based polymer stabilized broken stone test piece.
S2, sample preparation: a test piece is formed by adopting a rotary compaction method, and two long electrodes of the dielectric constant sensor (601) are stuck to two ends of a water-based polymer stabilized macadam test piece body (6).
S3, maintenance conditions: the water-based polymer stabilized macadam test piece body (6) is placed on a weighing tray (402) in a test box (2), the control device (103) adjusts the temperature and the humidity in the test box (2) to expected values through control, the water-based polymer stabilized macadam test piece is maintained for seven days, and two sets of comparison experiments are adopted, so that the influence rule of the temperature and the humidity on the maintenance process of the water-based polymer stabilized macadam is analyzed.
S4, testing results: and calculating data acquired by the dielectric constant sensor (601), determining a dissipation factor of the data, thus obtaining the relative maintenance state of the polymer in the water-based polymer stabilized macadam test piece body (6), performing mechanical measurement on the dehydration condition of the water-based polymer stabilized macadam test piece body (6) by adopting a high-precision weighing sensor (401), and if the quality does not change any more, indicating that the water-based polymer stabilized macadam is completely dehydrated and achieving the final age.
S5, standard maintenance age: the compression strength test is carried out by utilizing the aqueous polymer stabilized macadam test piece body (6) of the microcomputer controlled electronic universal testing machine, after the test piece is cured in the device, the test piece is taken out to carry out the unconfined compression strength test, the minimum time required when the unconfined compression strength reaches 5MPa is taken as the standard curing age,
s6, fast estimating a model: by testing the change of the relative curing degree of the test piece under different humidity and temperature conditions, a rapid estimation model for determining the standard curing age can be established.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211599284.1A CN115774095A (en) | 2022-12-14 | 2022-12-14 | Rapid testing device and method for maintenance age of waterborne polymer stabilized macadam |
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| CN202211599284.1A CN115774095A (en) | 2022-12-14 | 2022-12-14 | Rapid testing device and method for maintenance age of waterborne polymer stabilized macadam |
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| CN202211599284.1A Pending CN115774095A (en) | 2022-12-14 | 2022-12-14 | Rapid testing device and method for maintenance age of waterborne polymer stabilized macadam |
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