Method for detecting high temperature resistance of aa asphalt release agent

Abstract

The application discloses the technical field of asphalt performance detection, and particularly relates to a method for detecting high-temperature resistance of AA asphalt retarder. The detection method comprises the following steps: the AA asphalt retarder is heated at high temperature, then added to hot-mixed asphalt concrete and stirred uniformly to prepare asphalt concrete Marshall test pieces; the test pieces are demolded after being placed at normal temperature, then are cured in water at room temperature, and after aging, the surface moisture of the test pieces is wiped dry, weighed, and subjected to high-temperature resistance test; each test piece is continuously impacted in a Los Angeles abrasion tester barrel under the requirements of a specified rotation number and a specified rotation speed, and after the test, a largest whole piece is taken out and weighed; the integrity of the test piece is determined according to the looseness of the test piece, and the greater the mass of the remaining test pieces, the better the high-temperature resistance. The application can measure the performance of the AA asphalt retarder, and avoids the change of material stability caused by temperature problems when the AA asphalt retarder is used.

Description

Technical Field

[0001] This invention belongs to the field of asphalt performance testing technology, and in particular relates to a method for testing the high-temperature resistance of AA asphalt slow-release agent. Background Technology

[0002] In recent years, with the rapid development of urbanization and infrastructure construction, significant achievements have been made in road construction, especially in the construction of high-grade highways. The widespread use of asphalt concrete in road paving creates a huge demand for liquid asphalt. Traditional asphalt transportation and storage methods require high temperatures, which is not only inefficient but also consumes a large amount of energy during heating, negatively impacting the environment. Repeated heating can also degrade the performance of the asphalt. To address these issues, AA asphalt slow-release agent was developed. This innovative material can be mixed with asphalt at room temperature to form a solid or semi-solid form that is easy to store and transport. At the construction site, controlled conditions are used to slowly release the asphalt, restoring it to the desired usable state. This not only significantly saves energy consumption in transporting and storing asphalt and reduces environmental pollution but also improves the efficiency of road construction.

[0003] The application of AA asphalt slow-release agents not only improves the management and use efficiency of asphalt but also reduces its environmental impact while maintaining the original properties of the asphalt. However, accurate testing methods for its high-temperature resistance have become a key technical issue in ensuring road quality and extending its service life. Therefore, developing a high-temperature resistance testing technology compatible with AA asphalt slow-release agents is a pressing technical challenge that needs to be addressed in the industry's development. Summary of the Invention

[0004] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides a method for testing the high temperature resistance of AA asphalt slow-release agent.

[0005] To achieve the above objectives, the following technical solution is adopted: This invention provides a method for testing the high-temperature resistance of AA asphalt slow-release agent, the testing method comprising the following steps:

[0006] (1) Heat the AA asphalt slow-release agent at high temperature, then add it to the hot-mix asphalt concrete and stir evenly to prepare asphalt concrete Marshall specimens.

[0007] (2) After the asphalt concrete Marshall specimen is placed at room temperature, it is demolded and then cured in water at room temperature. After the curing period, it is taken out, the surface moisture is wiped off, and it is weighed.

[0008] (3) The asphalt concrete Marshall specimens obtained in step (2) are subjected to high temperature resistance test. Each specimen is continuously impacted in the barrel of the Los Angeles abrasion tester at a specified number of rotations and a specified speed. After the test, the largest whole piece is taken out and weighed. The integrity of the specimen is judged by the looseness of the specimen. The larger the mass of the remaining specimen, the better the high temperature resistance.

[0009] Furthermore, the heating temperature in step (1) is 235-245℃.

[0010] Furthermore, the heating in step (1) lasts for 5-6 hours.

[0011] Furthermore, the stirring speed in step (1) is 1000-1400 r / min.

[0012] Furthermore, the diameter of the asphalt concrete Marshall specimen is 101.4-101.8 mm.

[0013] Furthermore, the height of the asphalt concrete Marshall specimen is 63.2-64.8 mm.

[0014] Furthermore, the health maintenance time in step (2) is 24-36 hours.

[0015] Furthermore, in step (3), the number of rotations is set to 380-400 times.

[0016] Preferably, the number of rotations in step (3) is 390-400.

[0017] Preferably, the number of rotations in step (3) is 400.

[0018] Furthermore, the rotational speed is specified as 35-40 r / min in step (3).

[0019] The beneficial effects of this invention are as follows: This invention can accurately measure the performance of AA asphalt slow-release agent, avoiding changes in material stability due to temperature issues when using AA asphalt slow-release agent; This invention is not limited to specific types of samples, making it more comprehensive and versatile in asphalt testing technology, and helping to leverage the advantages of AA asphalt slow-release agent such as low cost, low energy consumption, and convenient storage and transportation. Attached Figure Description

[0020] Figure 1 The results are the high-temperature resistance test results of Examples 1-3.

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be applied to this invention. The preferred embodiments and materials described herein are for illustrative purposes only and do not limit the scope of this application.

[0024] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the experimental materials used in the following examples are all purchased from commercial channels.

[0025] Example 1

[0026] A method for testing the high-temperature resistance of AA asphalt slow-release agents

[0027] The detection method includes the following steps:

[0028] (1) Heat the AA asphalt slow-release agent at high temperature, then add it to the hot-mix asphalt concrete and stir evenly to prepare asphalt concrete Marshall specimens.

[0029] (2) After the asphalt concrete Marshall specimen is placed at room temperature, it is demolded and then cured in water at room temperature. After the curing period, it is taken out, the surface moisture is wiped off, and it is weighed.

[0030] (3) The asphalt concrete Marshall specimens obtained in step (2) are subjected to high temperature resistance test. Each specimen is continuously impacted in the barrel of the Los Angeles abrasion tester at a specified number of rotations and a specified speed. After the test, the largest whole piece is taken out and weighed. The integrity of the specimen is judged by the looseness of the specimen. The larger the mass of the remaining specimen, the better the high temperature resistance.

[0031] The heating temperature in step (1) is 235°C.

[0032] The heating in step (1) lasts for 5 hours.

[0033] The stirring speed in step (1) is 1000 r / min.

[0034] The asphalt concrete Marshall specimen had a diameter of 101.4 mm and a height of 63.2 mm.

[0035] The health maintenance time in step (2) is 24 hours.

[0036] In step (3), the number of rotations is set to 400.

[0037] The specified rotational speed in step (3) is 35 r / min.

[0038] Example 2

[0039] A method for testing the high-temperature resistance of AA asphalt slow-release agents

[0040] The detection method includes the same steps as in Example 1.

[0041] The heating temperature in step (1) is 245°C.

[0042] The heating in step (1) lasts for 6 hours.

[0043] The stirring speed in step (1) is 1400 r / min.

[0044] The asphalt concrete Marshall specimen had a diameter of 101.8 mm and a height of 64.8 mm.

[0045] The health maintenance time in step (2) is 36 hours.

[0046] In step (3), the number of rotations is set to 400.

[0047] The specified rotational speed in step (3) is 40 r / min.

[0048] Example 3

[0049] A method for testing the high-temperature resistance of AA asphalt slow-release agents

[0050] The detection method includes the same steps as in Example 1.

[0051] The heating temperature in step (1) is 240°C.

[0052] The heating in step (1) lasts for 5 hours.

[0053] The stirring speed in step (1) is 1200 r / min.

[0054] The asphalt concrete Marshall specimen had a diameter of 101.5 mm and a height of 64.0 mm.

[0055] The health maintenance time in step (2) is 28 hours.

[0056] In step (3), the number of rotations is set to 400.

[0057] The specified rotational speed in step (3) is 36 r / min.

[0058] Results Analysis

[0059] Three different AA asphalt slow-release agents were tested for high-temperature resistance according to Examples 1-3. The test results were expressed as the solids retention rate of the sample, calculated as: solids retention rate = (mass of remaining solids / weight) * 100%. Simultaneously, the dynamic stability (DS) of the AA asphalt slow-release agents was characterized using the Kentaburg asphalt mixture dispersion test method on a Los Angeles abrasion tester. The results are shown below. Figure 1 .

[0060] Depend on Figure 1 It can be seen that the test results of the high temperature resistance test of AA asphalt slow release agent using the test method of the present invention are consistent with the characterization results of the Kentburgh rutting test method, indicating that the method provided by the present invention can effectively test the performance of AA asphalt slow release agent, and the method provided by the present invention is more convenient and efficient than the traditional rutting test method.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0062] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention. The actual application is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar methods and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A method for testing the high-temperature resistance of AA asphalt slow-release agent, characterized in that: The detection method includes the following steps: (1) Heat the AA asphalt slow-release agent at a high temperature of 235-245℃, then add it to the hot-mix asphalt concrete and stir evenly to prepare asphalt concrete Marshall specimens. (2) After the asphalt concrete Marshall specimen is placed at room temperature, it is demolded and then cured in water at room temperature. After the curing period, it is taken out, the surface moisture is wiped off, and it is weighed. (3) The asphalt concrete Marshall specimens obtained in step (2) are subjected to high temperature resistance test. Each specimen is rotated 380-400 times and continuously impacted in the barrel of the Los Angeles abrasion tester at a speed of 35-40 r / min. After the test, the largest whole piece is taken out and weighed. The integrity of the specimen is judged by the looseness of the specimen. The larger the mass of the remaining specimen, the better the high temperature resistance.

2. The method for testing the high-temperature resistance of AA asphalt slow-release agent according to claim 1, characterized in that, The heating time in step (1) is 5-6 hours.

3. The method for testing the high-temperature resistance of AA asphalt slow-release agent according to claim 1, characterized in that, The diameter of the asphalt concrete Marshall specimens was 101.4-101.8 mm.

4. The method for testing the high-temperature resistance of AA asphalt slow-release agent according to claim 1, characterized in that, The height of the asphalt concrete Marshall specimens was 63.2-64.8 mm.

5. The method for testing the high-temperature resistance of AA asphalt slow-release agent according to claim 1, characterized in that, The health maintenance time in step (2) is 24-36 hours.

6. The method for testing the high-temperature resistance of AA asphalt slow-release agent according to claim 1, characterized in that, The number of rotations in step (3) is 390-400.

7. The method for testing the high-temperature resistance of AA asphalt slow-release agent according to claim 1, characterized in that: The number of rotations in step (3) is 400.

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