CN106959253A - A kind of asphalt moves water salt corrosion test device and test method - Google Patents

Abstract

The invention discloses an asphalt mixture dynamic water salt corrosion test device and a test method. The test device includes: a cycle pressurization mechanism, a test box, a test bottle, a test piece fixing plate and a test piece fixing mold. On the pressing mechanism, the test bottle is set inside the test box, the test piece fixed plate is set inside the test bottle, and the test piece fixed mold is placed inside the test piece fixed plate; the test method includes: sample preparation, sample loading, test, data Analysis and evaluation of results, etc. The present invention is beneficial in that: (1) the dynamic water salt corrosion test can be carried out on multiple asphalt mixture Marshall test pieces at the same time, which not only can significantly improve the reliability of the test data, but also can greatly speed up the test process; (2) can Study the high temperature stability, low temperature crack resistance and water stability of asphalt mixture under dynamic water salt corrosion conditions; (3) The proposed test method can more realistically simulate the impact of different salt corrosion conditions and traffic load on asphalt mixture road impact on performance.

Description

A dynamic water salt corrosion test device and test method for asphalt mixture

technical field

The invention relates to a test device and a test method, in particular to an asphalt mixture dynamic water salt corrosion test device and a test method, belonging to the technical field of road engineering test equipment.

Background technique

Water erosion of asphalt mixture is an important cause of asphalt pavement damage. At present, asphalt mixture is widely used in highway pavement engineering, and water erosion has an important impact on the performance and service life of pavement structure. Therefore, it is of great significance to comprehensively evaluate the water erosion of asphalt mixture.

The tests widely used to evaluate the water damage of asphalt mixture include water immersion Marshall test and freeze-thaw splitting test, etc. The main test devices used are constant temperature water tank, asphalt Marshall stability tester and so on. The use of these tests and devices is to evaluate the static water erosion of asphalt mixture, and there is still a lack of corresponding test methods and test devices for the study of dynamic water erosion.

In fact, studies have shown that water damage to asphalt pavements is largely caused by the impact of moving water. Moreover, in saline soil areas, etc., when it rains, the water on the road surface exists in the form of salt solution. Under the action of vehicle load, these salt solutions will have a great impact on the durability of asphalt pavement.

Based on this, a set of dynamic water salt corrosion test equipment for asphalt mixture under the influence of dynamic water and salt solution and other factors is designed to comprehensively evaluate the water damage and salt corrosion of asphalt mixture, which is helpful for improving the water damage resistance of asphalt mixture and improving the road surface. Structural durability has important practical significance.

Contents of the invention

In order to solve the deficiencies in the prior art, the object of the present invention is to provide a kind of dynamic water salt corrosion test device and test method of asphalt mixture, which can better simulate the action of asphalt mixture in dynamic water or salt solution. It is helpful to study the water damage and salt corrosion of asphalt mixture, and can comprehensively evaluate the influence of dynamic water or salt solution on the road performance of asphalt mixture.

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

An asphalt mixture dynamic water salt corrosion test device is characterized in that it includes: a cyclic pressurization mechanism, a test box, a test bottle, a test piece fixing plate and a test piece fixing mold, wherein,

The aforementioned circulation pressurization mechanism consists of a base, a circulation pressurization pump, a transmission shaft, a piston, a control panel and a control button. The base is in the shape of a "C". The control panel and the control buttons are installed at the lower part of the base. The control panel is used to control the pressurization frequency and size of the circulating pressurization pump, display the movement displacement of the piston, and adjust the rise and fall of the piston. The control button is used Used to control the energization, start, stop and emergency stop of the cyclic pressurization mechanism;

The aforementioned test box is set in the concave part of the base, and is fixedly connected with the base, and the top surface of the test box has a through hole for the piston to pass through;

The aforementioned test bottle is set inside the test box and is fixedly connected with the test box. The outer side of the test bottle is provided with a water pipe, a manometer and a water outlet, and the inner side is provided with a card slot and screws. A piston is provided on the bottle cap. through-holes through;

The aforementioned test piece fixing plate is set inside the test bottle, and is fixedly connected with the test bottle through a slot and screws, and the test piece fixing plate is welded by steel mesh to allow water to pass through;

The aforementioned fixed mold for the test piece is placed inside the fixed plate of the test piece, and is at the same height as the fixed plate for the test piece. The fixed mold for the test piece is welded by steel plates. Flow through the inside of the test piece, not around the test piece.

The aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that the aforementioned test box is made of steel plates.

The aforementioned dynamic water salt corrosion test device for asphalt mixture is characterized in that the aforementioned test box has an interlayer, and thermal insulation and sound-absorbing materials are placed in the interlayer.

The aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that the body and cap of the aforementioned test bottle are made of impact-resistant polymer materials.

The aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that a rubber pad is arranged between the body of the test bottle and the bottle cap.

The aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that the body of the test bottle, the bottle cap and the test box are fixed by threaded steel rods.

The aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that a hard rubber pad is arranged between the bottom of the aforementioned test bottle and the test box.

The aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that the aforementioned fixed plate of the test piece is provided with a steel net cover, and the net cover is fixedly connected with the main body of the fixed plate of the test piece through an elastic latch. A number of screw holes are formed for passing screws located inside the test bottle.

The aforementioned dynamic water salt corrosion test device for asphalt mixture is characterized in that the aforementioned fixed plate of the test piece is fixedly connected with the test bottle through a clamping groove.

The method for carrying out the asphalt mixture dynamic water salt corrosion test using the aforementioned asphalt mixture dynamic water salt corrosion test device is characterized in that it includes the following steps:

Step1: sample preparation

Prepare the Marshall test piece on the Marshall test piece compaction instrument according to the specification, and prepare the rut plate test piece on the rutting sample forming machine according to the specification requirements;

Step2: sample loading

Place the Marshall specimen or the rut plate specimen prepared in Step 1 in the fixed mold of the specimen, then place the fixed mold of the specimen in the fixed plate of the test piece, and then place the fixed plate of the test piece in the test bottle and fix it to the test Add water/a certain concentration of salt solution into the bottle, then put the piston, then add water/a certain concentration of salt solution, and finally cover the bottle cap, put the test bottle into the interior of the test chamber, and connect the piston to the transmission shaft;

Step3: Experiment

According to its own test program design, select a certain frequency and pressure for cyclic loading test to simulate the contact between the tire and the road surface;

Step4: Analysis of dynamic water salt erosion

Take out the Marshall specimen or the rutting plate specimen in Step3, and conduct the freeze-thaw splitting test and stability test on the Marshall specimen to study the influence of hydrodynamic salt erosion on the water stability of asphalt mixture. Carry out high-temperature rutting test on the rutting plate to study the effect of hydrodynamic salt erosion on the high-temperature stability of asphalt mixture, or cut the rut plate specimen into small beam specimens, and conduct low-temperature bending test of trabecular to study the influence of hydrodynamic salt erosion on the high temperature stability of asphalt mixture. Influence of low temperature cracking resistance of asphalt mixture;

Step5: Change the test conditions

Replace the salt solution in the test bottle, take different concentrations of salt solution to test, study the dynamic water salt erosion effect of different concentrations of salt solution on asphalt mixture; take different types of salt solution to test, study each salt solution The hydrodynamic salt erosion effect on asphalt mixture; use two or more than two kinds of salt solutions to test each time, and study the hydrodynamic salt erosion effect on asphalt mixture under the coupling of various salts;

Change the frequency and pressure of the cyclic pressurization mechanism to simulate the dynamic water damage to the road surface under different vehicle speeds and loads;

Step6: Give a conclusion

According to the results of parallel tests, the change law of asphalt mixture performance under the condition of dynamic water and salt corrosion is analyzed, and corresponding conclusions are drawn.

The benefits of the present invention are:

(1) The test device of the present invention can test a plurality of Marshall test pieces simultaneously, not only can control the consistency of the test conditions of the test pieces better, improve the reliability and comparability of test data, but also can greatly reduce the cost of the test. Time to speed up the process of testing;

(2) The test device of the present invention can carry out dynamic water erosion test to asphalt mixture rutting slab, can study the high-temperature performance of asphalt mixture after being eroded by pressurized water or salt solution, after rutting slab is cut into small beam test piece, can Used to study the low-temperature crack resistance of asphalt mixture after being corroded by pressure water or salt solution;

(3) The test device of the present invention can comprehensively evaluate the impact of dynamic water on the road performance of asphalt mixture, the test data is accurate, and the operation is flexible and convenient;

(4) The test method of the present invention not only considers the use of different frequencies and pressures to test, can simulate more realistically the dynamic water erosion effect of different vehicle speeds and vehicle loads on the asphalt pavement, but also considers the dynamics of different salt concentrations on the asphalt mixture. The difference in water salt erosion ability can simulate the difference in the dynamic water salt erosion of asphalt pavement in areas with different salt concentrations. At the same time, the difference in salt types can be considered, and the dynamic water salt erosion based on different types of salt solutions can be simulated.

Description of drawings

Fig. 1 is the front view of asphalt mixture dynamic water salt corrosion test device of the present invention;

Fig. 2 is the left view of the asphalt mixture dynamic water salt corrosion test device in Fig. 1;

Fig. 3 is the top view of the asphalt mixture dynamic water salt corrosion test device in Fig. 1;

Fig. 4 is the cross-sectional view of the asphalt mixture dynamic water salt corrosion test device in Fig. 1;

Fig. 5 is the structural representation of test piece fixed plate;

Fig. 6 is the schematic diagram of packing into Marshall test piece in the fixed mold of test piece;

Fig. 7 is a schematic diagram of loading the rut plate specimen into the fixed mold of the specimen.

The meanings of the reference signs in the figure: 1-cycle pressurization mechanism, 2-test box, 3-test bottle, 4-specimen fixing plate, 5-threaded steel rod, 6-hard rubber pad, 7-Marshall test piece , 8-rut plate test piece, 9-fixed mold for test piece, 10-fixed mold for test piece, 11-observation window, 101-base, 102-circulating pressurized pump, 103-transmission shaft, 104-piston, 105-control Panel, 106-control button, 201-insulation and sound-absorbing material, 301-water pipe, 302-manometer, 303-water outlet, 304-screw, 401-screw hole.

detailed description

The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

First, the structure of the asphalt mixture dynamic water salt corrosion test device of the present invention is introduced.

With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, asphalt mixture dynamic water salt corrosion test device of the present invention comprises: circulating pressurization mechanism 1, test box 2, test bottle 3, test piece fixing plate 4 and test piece fixing Mold 9, specimen fixed mold 10.

1. Cyclic pressurization mechanism

The circulation press mechanism 1 is made up of a base 101 , a circulation press pump 102 , a transmission shaft 103 , a piston 104 , a control panel 105 and a control button 106 .

The base 101 is in the shape of a "C", and the circulating pressure pump 102 (using liquid pressurization) is installed on the top of the base 101, the piston 104 is connected with the circulating pressure pump 102 through the transmission shaft 103, and the control panel 105 and the control button 106 are installed at the bottom of the base 101.

The control panel 105 is used to control the pressurization frequency and pressurization size of the circulating pressurization pump 102, display the operating displacement of the piston 104, and adjust the rise and fall of the piston 104, so that the water damage of the asphalt pavement by the vehicle speed and vehicle load can be better studied. Impact.

The control buttons 106 are used to control the energization, start, stop and emergency stop of the circulating pressurizing mechanism 1, and they are: power button, start button, stop button, and emergency stop button in sequence from left to right.

2. Test chamber

The test box 2 is arranged in the concave part of the base 101, and is fixedly connected with the base 101 by screws.

The test box 2 is made of steel plate and is in the shape of a cuboid, with a through hole for the piston 104 passing through left on the top surface.

The test box 2 has an interlayer, and a thermal insulation and sound absorption material 201 is placed in the interlayer. The thermal insulation and sound absorption material 201 can reduce the generation of noise to a certain extent.

3. Test bottle

The test bottle 3 is arranged inside the test box 2 and is fixedly connected with the test box 2 .

The test bottle 3 is cylindrical, and its outer surface is provided with a water pipe 301, a manometer 302 and a water outlet 303, and its inner surface is provided with a card slot (not shown) and a screw 304, and the bottle cap has a hole for the piston 104 to pass through. through holes. Wherein, the water pipe 301 is used to connect the upper part and the lower part of the bottle body, and the slot and the screw 304 are used to fix the fixed plate 4 of the test piece.

The bottle body and the bottle cap of the test bottle 3 are all made of impact-resistant polymer materials, and a rubber pad is arranged between the two, and the rubber pad is used to prevent water from flowing out.

The bottle body of the test bottle 3, the bottle cap and the test box 2 are fixed by four threaded steel rods 5, and the two threaded steel rods 5 positioned on the front side can move to both sides in the form of elastic nuts.

A hard rubber pad 6 is arranged between the bottom of the test bottle 3 and the test chamber 2, and the hard rubber pad 6 can prevent the damage to the test bottle 3 by the cycle press mechanism 1 during the cycle pressurization process to a certain extent.

4. Specimen fixing plate

The test piece fixing plate 4 is arranged inside the test bottle 3, and is fixedly connected with the test bottle 3 through a slot and screws.

Referring to FIG. 5 , the test piece fixing plate 4 is in the shape of a flat cylinder and is welded by steel mesh to allow water to pass through. The test piece fixed plate 4 is provided with a steel net cover, which is fixedly connected to the main body of the test piece fixed plate 4 through an elastic snap lock. A number of screw holes 401 are formed on the edge of the net cover, and the screw holes 401 are used for positioning The screw inside the test bottle 3 passes through, and the main body of the test piece fixed plate 4 has a certain height. , the Marshall test piece and the rut plate test piece are just clamped in the test piece fixing disc 4 .

The test piece fixing plate 4 is fixedly connected with the test bottle 3 through a slot and a screw located on the inner side wall of the test bottle 3 as a whole.

5. Test piece fixed mold

Both the test piece fixed mold 9 and the test piece fixed mold 10 are placed in the inside of the test piece fixed disk 4 , both of which are at the same height as the test piece fixed disk 4 .

Both the test piece fixed mold 9 and the test piece fixed mold 10 are welded by steel plates. The cavity for placing the test piece is transparent up and down. When the test piece is placed in the cavity, the test piece will not sideways. Toward displacement, the pressure water can only flow through the inside of the test piece, not around the test piece.

Fig. 6 is the schematic diagram after packing into Marshall test piece 7 in test piece fixed mold 9, and this test piece fixed mold 9 can adorn 8 Marshall test pieces 7 once, and a plurality of Marshall test pieces 7 are tested simultaneously, both can better Control the consistency of the test conditions of the specimens, improve the reliability and comparability of the test data, and greatly reduce the test time and speed up the test process.

FIG. 7 is a schematic diagram of the rutting plate test piece 8 loaded into the test piece fixed mold 10 .

Next, the method of using the above-mentioned dynamic water salt corrosion test device for asphalt mixture to conduct the dynamic water salt corrosion test of asphalt mixture is introduced.

The test method specifically includes the following steps:

Step1: sample preparation

Marshall test pieces 7 were prepared according to the specification on the Marshall test piece compaction machine.

The rutting plate specimen 8 was prepared on the rutting sample forming instrument according to the specification requirements.

Step2: sample loading

Place the Marshall test piece 7 prepared in Step 1 in the test piece fixed mold 9, or place the rut plate test piece 8 prepared in Step 1 in the test piece fixed mold 10, and then place the test piece fixed mold 9 or the test piece fixed mold 10 In the test piece fixing plate 4, the test piece fixing plate 4 is placed in the test bottle 3 and fixed.

Add water/saline solution of certain concentration (can be sulfate, chlorate etc., also can be their mixed salt solution) in test bottle 3, put into piston 104 afterwards, add water/saline solution of certain concentration again.

Finally cover the bottle cap, put the test bottle 3 into the test chamber 2, and connect the piston 104 to the transmission shaft 103.

Both water and saline solution can be contained in the test bottle 3, and all test devices of the present invention can both study the erosive effect of pressure water on asphalt mixture and the erosive effect of pressure salt solution on asphalt mixture.

Step3: Experiment

According to its own test program design, a certain frequency and pressure are selected for cyclic loading test to simulate the contact between the tire and the road.

Step4: Analysis of dynamic water salt erosion

Take out the Marshall specimen or the rut plate specimen in Step3.

For the Marshall specimens, freeze-thaw splitting test and stability test were carried out on the Marshall specimens to study the influence of hydrodynamic salt erosion on the water stability of asphalt mixture.

For the rut slab specimens, high-temperature rutting tests were carried out on the rut slab specimens to study the effect of hydrodynamic salt erosion on the high-temperature stability of asphalt mixture.

Alternatively, cut the rut plate specimens into small beam specimens, and conduct low-temperature bending tests of small beams to study the effect of hydrodynamic salt erosion on the low-temperature crack resistance of asphalt mixtures.

Step5: Change the test conditions

Replace the salt solution in the test bottle 3, and take different concentrations of salt solutions for experiments to study the dynamic water salt erosion effect of different concentrations of salt solutions on asphalt mixture.

Replace the salt solution in the test bottle 3, and take different types of salt solutions to test, and study the dynamic water salt erosion effect of each salt solution on the asphalt mixture.

Replace the salt solution in the test bottle 3, use two or more than two kinds of salt solutions each time for the test, and study the dynamic water salt erosion effect on the asphalt mixture under the coupling of various salts.

Change the frequency and pressure of the cyclic pressurization mechanism 1 to simulate the dynamic water and salt erosion effect on the road surface with different vehicle speeds and loads.

Step6: Give a conclusion

According to the results of parallel tests, the change law of asphalt mixture performance under the condition of dynamic water and salt corrosion is analyzed, and corresponding conclusions are drawn.

It can be seen that the dynamic water salt erosion test method of asphalt mixture of the present invention considers the use of different frequencies and pressures to test, and can more realistically simulate the dynamic water erosion effect of different vehicle speeds and vehicle loads on asphalt pavement; considering different salt concentrations The difference in dynamic water salt erosion ability of asphalt mixture can simulate the difference in dynamic water salt erosion of asphalt pavement in areas with different salt concentrations; it also considers the difference in salt types, and can simulate dynamic water salt erosion based on different types of salt solutions function etc.

In summary, the asphalt mixture dynamic water salt corrosion test device and test method of the present invention can better simulate the erosion process of asphalt mixture under the action of dynamic water or salt solution, and help to study the water damage of asphalt mixture And salt corrosion, can more comprehensively evaluate the impact of dynamic water or salt solution on the road performance of asphalt mixture.

It should be noted that the above embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. A dynamic water salt corrosion test device for asphalt mixture is characterized in that it comprises: cyclic pressurization mechanism (1), test chamber (2), test bottle (3), test piece fixed plate (4) and test piece fixed mold (9,10), wherein, The circulation pressurization mechanism (1) is made up of base (101), circulation pressurization pump (102), transmission shaft (103), piston (104), control panel (105) and control button (106), and base (101 ) is in the shape of a "C", the circulating booster pump (102) is installed on the top of the base (101), the piston (104) is connected with the circulating booster pump (102) through the transmission shaft (103), the control panel (105) and The control buttons (106) are installed on the lower part of the base (101), and the control panel (105) is used to control the pressurization frequency and pressurization size of the circulating pressurization pump (102), display the running displacement of the piston (104) and adjust the piston (104) rise and fall, the control button (106) is used to control the energization, start, stop and emergency stop of the cyclic pressurization mechanism (1); The test box (2) is arranged on the concave part of the base (101), and is fixedly connected with the base (101), and the top surface of the test box (2) has a through hole for the piston (104) to pass through; Described test bottle (3) is arranged on the inside of test box (2), and is fixedly connected with test box (2), and the outer surface of test bottle (3) is provided with water pipe (301), manometer (302) and The water outlet (303) has a card slot and a screw on the inner surface, and a through hole for the piston (104) to pass through is left on the bottle cap; The test piece fixing plate (4) is arranged inside the test bottle (3), and is fixedly connected with the test bottle (3) through a slot and screws, and the test piece fixing plate (4) is welded by a steel mesh to allow water flow pass; The test piece fixed molds (9, 10) are placed inside the test piece fixed plate (4), and are at the same height as the test piece fixed plate (4), and the test piece fixed molds (9, 10) are welded by steel plates, Because the cavity where the test piece is placed is transparent from top to bottom, the pressure water can only flow through the inside of the test piece, not around the test piece. 2. The asphalt mixture dynamic water salt corrosion test device according to claim 1, characterized in that the test chamber (2) is made of steel plates. 3. The asphalt mixture dynamic water salt corrosion test device according to claim 1, characterized in that, the test box (2) has an interlayer, and an insulating and sound-absorbing material (201) is placed in the interlayer. 4. The asphalt mixture dynamic water salt corrosion test device according to claim 1, characterized in that, the body and the bottle cap of the test bottle (3) are made of impact-resistant polymer materials. 5. The asphalt mixture dynamic water salt corrosion test device according to claim 1, characterized in that a rubber pad is arranged between the body and the bottle cap of the test bottle (3). 6. asphalt mixture dynamic water salt corrosion test device according to claim 1, is characterized in that, the bottle body of described test bottle (3) and bottle cap and test box (2) are passed threaded steel bar between the three (5) Fix it. 7. The asphalt mixture dynamic water salt corrosion test device according to claim 6, characterized in that a hard rubber pad (6) is arranged between the bottom of the test bottle (3) and the test box (2). 8. The dynamic water salt corrosion test device for asphalt mixture according to claim 1, characterized in that, the test piece fixing plate (4) has a steel net cover, and the net cover is fixed to the test piece by an elastic snap lock The main body of the disc (4) is fixedly connected, and a number of screw holes (401) are formed on the edge of the net cover, and the screw holes (401) are used for the screws located inside the test bottle (3) to pass through. 9. The asphalt mixture dynamic water salt corrosion test device according to claim 1, characterized in that, the test piece fixing plate (4) is fixedly connected to the test bottle (3) through a clamping groove. 10. utilize the asphalt mixture dynamic water salt corrosion test device described in any one of claims 1 to 9 to carry out the method for asphalt mixture dynamic water salt corrosion test, it is characterized in that, comprising the following steps: Step1: sample preparation Prepare the Marshall test piece (7) on the Marshall test piece compaction instrument according to the specification, and prepare the rut plate test piece (8) according to the specification requirements on the rut sample forming instrument; Step2: sample loading Place the Marshall test piece (7) prepared in Step1 in the test piece fixed mold (9), or place the rut plate test piece (8) prepared in Step1 in the test piece fixed mold (10), and then place the test piece fixed mold (9, 10) are placed in the test piece fixing plate (4), then the test piece fixing plate (4) is placed in the test bottle (3) and fixed, and water/a certain concentration of salt is added to the test bottle (3) solution, then put the piston (104), then add water/a certain concentration of salt solution, and finally cover the bottle cap, put the test bottle (3) into the inside of the test box (2), and make the piston (104) and the transmission Shaft (103) links to each other; Step3: Experiment According to its own test program design, select a certain frequency and pressure for cyclic loading test to simulate the contact between the tire and the road surface; Step4: Analysis of dynamic water salt erosion Take out the Marshall specimen (7) or the rutting plate specimen (8) in Step3, and conduct the freeze-thaw splitting test and stability test on the Marshall specimen (7), to study the effect of hydrodynamic salt erosion on the water content of asphalt mixture. Influence of stability performance, carry out high-temperature rutting test on the rut plate specimen (8) to study the effect of hydrodynamic salt erosion on the high temperature stability of asphalt mixture, or cut the rut plate specimen (8) into small beam specimens , carry out trabecular low-temperature bending test, and study the effect of hydrodynamic salt erosion on the low-temperature cracking resistance of asphalt mixture; Step5: Change the test conditions Replace the salt solution in the test bottle (3), and take different concentrations of salt solutions to test, and study the hydrodynamic salt erosion effect of different concentrations of salt solutions on asphalt mixture; take different types of salt solutions to test, study each The hydrodynamic salt erosion effect of various salt solutions on asphalt mixture; each time two or more than two kinds of salt solutions are used for experiments to study the hydrodynamic salt erosion effect of asphalt mixture under the coupling of various salts; Change the frequency and pressure of the cyclic pressurization mechanism (1) to simulate the dynamic water and salt erosion effect on the road surface with different vehicle speeds and loads; Step6: Give a conclusion According to the results of parallel tests, the change law of asphalt mixture performance under the condition of dynamic water and salt corrosion is analyzed, and corresponding conclusions are drawn.