Asphalt content nondestructive testing method based on ultrasonic vibration and ultrasonic cleaner

Abstract

The invention discloses an asphalt content nondestructive testing method based on ultrasonic vibration and an ultrasonic cleaner, according to the method, an adhesion interface of asphalt and aggregate is destroyed by utilizing an ultrasonic cavitation effect and mechanical vibration, the asphalt is promoted to be stripped from a mixture, and the asphalt content is accurately evaluated after drying and weighing. The device does not damage the components of the asphalt, can perform rapid physical separation on the mixture, avoids unnecessary loss of the asphalt components, does not need to add chemical agents in the separation process, does not affect the detection result, can improve the separation efficiency of the asphalt, improves the measurement accuracy of the asphalt content, and has a good application prospect. High instrument energy consumption and environmental pollution of a traditional method are avoided, and meanwhile, the method has the advantages of environmental protection and energy conservation.

Description

Technical Field

[0001] The present invention belongs to the technical field of asphalt detection, and relates to a non-destructive detection method for asphalt content based on ultrasonic vibration and an ultrasonic cleaner. Background Art

[0002] With the continuous development of road construction, asphalt, as one of the main materials for road construction, its quality plays a crucial role in the safety and service life of roads. The measurement of asphalt content is a key link to ensure road quality, directly related to the performance and durability of roads. The reasonable control of asphalt content can significantly affect the high-temperature stability, low-temperature crack resistance, water stability, and fatigue characteristics of roads. Therefore, accurately and quickly measuring the asphalt content has become a key link in road construction quality control.

[0003] Currently, the main methods for measuring asphalt content are the combustion furnace method and the centrifugal separation method. The combustion furnace method burns off the asphalt in the asphalt mixture through high-temperature combustion, and calculates the asphalt content by weighing the mass difference before and after combustion. Although the combustion method is simple to operate, it is easy to cause asphalt aging under high-temperature conditions, and toxic and harmful gases and waste will be generated after combustion, polluting the environment. The centrifugal separation method separates the asphalt from the aggregates in the asphalt mixture by centrifugal force. After dissolving the asphalt with an organic solvent (such as trichloroethylene), the asphalt content is calculated by centrifugal separation and drying and weighing. However, the centrifugal separation method has a more complex operation process, requires the use of organic solvents, has a high cost, and the waste liquid generated has a certain impact on the environment. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the existing methods are carried out under high-temperature conditions, resulting in asphalt aging, and toxic and harmful gases and waste are generated after combustion, polluting the environment, or the centrifugal separation method has a more complex operation process, requires the use of organic solvents, has a high cost, and the waste liquid generated has a certain impact on the environment. The present invention provides a non-destructive detection method for asphalt content based on ultrasonic vibration and an ultrasonic cleaner, which can effectively improve the measurement accuracy of asphalt content, reduce energy consumption, and solve the problems of low safety, low result accuracy, and environmental pollution in traditional asphalt measurement methods.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A non-destructive detection method for asphalt content based on ultrasonic vibration, comprising the following steps:

[0007] Obtain the weight of the asphalt mixture sample to be tested, denoted as m1;

[0008] Perform ultrasonic cleaning and separation on the asphalt mixture sample to obtain the separated asphalt and aggregates;

[0009] Dry the aggregate, and record the weight of the dried aggregate as m2;

[0010] Calculate the asphalt content based on the weight m1 of the asphalt mixture sample and the weight m2 of the aggregate.

[0011] Furthermore, obtaining the weight of the asphalt mixture sample to be tested, denoted as m1, includes:

[0012] Prepare an asphalt mixture sample;

[0013] After the prepared asphalt mixture sample has cooled to room temperature, weigh the asphalt mixture sample.

[0014] Furthermore, performing ultrasonic cleaning on the asphalt mixture sample to obtain separated asphalt and aggregate includes:

[0015] Place the weighed asphalt mixture sample in the sieve of the ultrasonic cleaner, add water to the ultrasonic cleaner until the water covers the asphalt mixture sample, then start the ultrasonic cleaner, and use the ultrasonic cavitation effect and mechanical vibration of the ultrasonic cleaner to separate the asphalt and the aggregate;

[0016] After the vibration ends, take out the aggregate in the sieve, clean the aggregate, place the cleaned aggregate in an oven to dry, cool to room temperature after drying, and weigh the aggregate, denoted as m2.

[0017] Furthermore, when the ultrasonic cleaner cleans the asphalt mixture sample, the parameters include:

[0018] The water temperature is 55°C - 65°C, the frequency is 28 kHz - 40 kHz, the power is 150 W - 180 W, and the time is 30 min - 40 min.

[0019] Furthermore, calculating the asphalt content based on the weight m1 of the asphalt mixture sample and the weight m2 of the aggregate includes:

[0020]

[0021] Where P represents the asphalt content; m1 represents the mass of the asphalt mixture sample before separation; m2 represents the mass of the aggregate after separation.

[0022] Furthermore, when calculating the asphalt content, it also includes:

[0023] Perform solid-liquid separation on the asphalt particles in the separated liquid until the waste liquid reaches the discharge standard for discharge.

[0024] Furthermore, performing solid-liquid separation on the asphalt particles in the separated liquid includes:

[0025] Let the waste liquid in the instrument stand still, so that the larger asphalt particles in the waste liquid settle to the bottom of the instrument and are preliminarily separated from the water;

[0026] Filter the waste liquid to remove suspended asphalt and solid impurities;

[0027] Add activated carbon to the waste liquid to make the activated carbon adsorb dissolved asphalt colloid. After the adsorption is completed, filter the waste liquid again to remove the activated carbon adsorbed with asphalt colloid, and discharge the remaining waste liquid.

[0028] Further, when filtering the waste liquid to remove suspended asphalt and solid impurities, filter through a filter screen, and the aperture of the filter screen ≤ 0.075mm.

[0029] Further, when adding activated carbon, the ratio of activated carbon to waste liquid is to add 5 - 10g of activated carbon to every 1L of waste liquid.

[0030] An ultrasonic cleaner is used to perform ultrasonic cleaning and separation on the asphalt mixture sample described in any one of the present inventions.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention discloses a non-destructive detection method for asphalt content based on ultrasonic vibration. This method utilizes the ultrasonic cavitation effect and mechanical vibration to destroy the adhesion interface between asphalt and aggregate, promotes the separation of asphalt from the mixture, and accurately evaluates the asphalt content after drying and weighing. It will not damage the components of the asphalt itself, can perform rapid physical separation on the mixture, avoid unnecessary loss of asphalt components, and does not require the addition of chemical agents during the separation process, so as not to affect the detection results. It can not only improve the separation efficiency of asphalt, improve the accuracy of asphalt content measurement, avoid the high instrument energy consumption and environmental pollution of traditional methods, but also has the advantages of environmental protection and energy conservation.

[0033] Further, in the present invention, through the combination of a sieve and ultrasonic vibration, the separated aggregate can be immediately separated from the asphalt solution, avoiding repeated contamination, improving the accuracy of subsequent asphalt content measurement, and the ultrasonic cleaning only uses water medium. The aggregate is more likely to reach a constant weight state after drying in an oven, reducing systematic errors. The ultrasonic vibration separates the asphalt in a non-destructive manner, retaining the integrity of the aggregate and ensuring that the weighing result more truly reflects the original aggregate quality. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0035] Figure 1 This is the flow chart of the detection method of the present invention;

[0036] Figure 2 This is the diagram of the ultrasonic cleaner of the present invention;

[0037] Figure 3 This is the diagram of the filter screen of the ultrasonic cleaner of the present invention;

[0038] Figure 4 This is the schematic diagram of the installation of the filter screen of the present invention. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0043] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0044] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] The present invention is described in further detail below with reference to the accompanying drawings:

[0046] See also Figure 1 The embodiment of the present invention discloses a non-destructive testing method for asphalt content based on ultrasonic vibration and an ultrasonic cleaning instrument. The non-destructive testing method utilizes ultrasonic cavitation effect and mechanical vibration to destroy the adhesion interface between asphalt and aggregate, prompting the asphalt to be peeled off from the mixture, and accurately evaluates the asphalt content after drying and weighing. This non-destructive testing technology can quickly physically separate the mixture, avoiding unnecessary loss of asphalt components, without the need to add chemical reagents to affect the test results. This method significantly improves the separation efficiency of asphalt, improves the accuracy of asphalt content measurement, avoids the high energy consumption of instruments and pollution to the environment of traditional methods, and has the advantages of environmental protection and energy saving.

[0047] Specifically, the following steps are included:

[0048] Step 1: Sample preparation

[0049] Step 1.1: Prepare asphalt mixture samples in strict accordance with the "Test Procedure for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011).

[0050] Step 1.2: After hot mixing, pour the asphalt mixture sample onto a clean, dry pallet and use a shovel or other tool to spread the mixture into granules, trying to avoid clumping or local accumulation of the mixture.

[0051] Step 1.3: After the asphalt mixture sample has cooled to room temperature, weigh 500 g of the asphalt mixture sample using a balance with an accuracy of 0.1 g, and record it as m1.

[0052] Step 2: Physical separation of asphalt and aggregate

[0053] Step 2.1: Place the weighed asphalt mixture sample into the sieve of an ultrasonic cleaner, add water to cover the sample, set the water temperature to 55°C-65°C, frequency to 28kHz-40kHz, power to 150W-180W, and time to 30min-40min, and use ultrasonic cavitation effect and mechanical vibration to separate the asphalt and aggregate.

[0054] Step 2.2: After the vibration ends, take out the sieve mesh, clean the aggregates in the sieve mesh, put them into an oven for drying, take them out and cool them to room temperature, and weigh the mass of the aggregates with a balance with an accuracy of 0.1 g, denoted as m2.

[0055] Step 3: Measure the asphalt content

[0056] Calculate the asphalt content according to the mass m1 of the asphalt mixture sample and the mass m2 of the separated aggregates. The formula is as follows:

[0057]

[0058] In the formula:

[0059] P: Asphalt content, unit: percentage (%)

[0060] m1: Mass of the asphalt mixture sample before separation, unit: gram (g)

[0061] m2: Mass of the separated aggregates, unit: gram (g)

[0062] Step 4: Environmental protection treatment

[0063] Step 4.1: After taking out the sieve mesh, let it stand still until the larger asphalt particles settle to the bottom of the instrument and are initially separated from the water, and pour the upper-layer waste liquid of the cleaning instrument into a glass instrument.

[0064] Step 4.2: Install a filter screen with a pore size ≤ 0.075 mm on the filtering device, slowly pour the waste liquid into the filtering device, and let the waste liquid pass through the filter screen to remove suspended asphalt and solid impurities.

[0065] Step 4.3: In the waste liquid after filtration treatment, add activated carbon at a ratio of 5 - 10 g / L, stir well to make the activated carbon completely adsorb the soluble asphalt colloid. After the stirring and adsorption are completed, use the filtering device to filter the waste liquid again to remove the activated carbon adsorbed with asphalt colloid, and the remaining waste liquid can meet the laboratory sewage discharge standard.

[0066] The method disclosed in this embodiment has the following advantages:

[0067] First, compared with the traditional method, this technology avoids the influence of high-temperature decomposition or solvent residue of asphalt, and greatly improves the detection accuracy.

[0068] Second, this technology can quickly and accurately measure the asphalt content, shortening the detection time.

[0069] Third, compared with the complex equipment required by the traditional method, the ultrasonic instrument has simple operation steps, reduces the dependence on professional equipment, has high safety, and is suitable for on-site use.

[0070] Fourth, traditional methods have high energy consumption and high solvent costs, while ultrasonic waves consume low electricity. The ultrasonic method uses water as the medium, which is pollution-free. The waste liquid after treatment can meet the discharge standards after filtration and activated carbon adsorption. Moreover, water can be recycled and activated carbon can be recovered. This can greatly reduce the detection cost, save energy and be pollution-free.

[0071] Example 1 of implementation:

[0072] An asphalt content non-destructive detection device and method based on ultrasonic technology, including the following steps:

[0073] Step 1: Preparation of samples

[0074] Step 1.1: Select 70# petroleum asphalt and basalt gravel to prepare asphalt mixture. Heat the 70# petroleum asphalt to 150°C, and heat the basalt aggregate particles to 160°C after cleaning and drying. Assuming the asphalt content is 5%, put 950g of aggregate into an enamel tray, add 50g of 70# matrix asphalt, and stir evenly (by hand) for 1 min - 1.5 min.

[0075] Step 1.2: After hot mixing, pour the asphalt mixture sample onto a clean and dry tray, and use tools such as shovels to spread the mixture into granular form, trying to avoid the mixture from agglomerating or accumulating locally.

[0076] Step 1.3: Wait for the asphalt mixture sample to cool to room temperature, and use a balance with a precision of 0.1g to weigh 500g of the asphalt mixture sample, denoted as m1.

[0077] Step 2: Physical separation of asphalt and aggregate

[0078] Step 2.1: Put the weighed asphalt mixture sample into the sieve in the ultrasonic cleaner, add water to cover the sample, set the water temperature to 55°C, frequency to 28 kHz, power to 180 W, and time to 40 min, and use the ultrasonic cavitation effect and mechanical vibration to separate asphalt and aggregate.

[0079] Step 2.2: After the vibration ends, take out the sieve, clean the aggregate in the sieve, put it into the oven to dry, take it out and cool to room temperature, and weigh the aggregate quality with a balance with a precision of 0.1g. This quality is m2 = 475.2g.

[0080] Step 3: Measurement of asphalt content

[0081] From the mass of the asphalt mixture sample m1 = 500g and the mass of the separated aggregate m2 = 475.2g, calculate the asphalt content according to the above formula. The results are as follows:

[0082]

[0083] It can be seen from the results that the measured asphalt content is 4.96%, slightly lower than the designed value of 5%. The reason for the error may be that a small amount of asphalt was not completely separated, but the error range of ±0.3% meets the requirements of on-site rapid detection.

[0084] Step 4: Environmental protection treatment

[0085] Step 4.1: After taking out the sieve, continue to let it stand still until the asphalt particles settle to the bottom of the instrument and are initially separated from the water. Pour the upper-layer waste liquid of the cleaning instrument into a glass instrument.

[0086] Step 4.2: Install a filter screen with a pore size ≤ 0.075 mm on the filtering device, slowly pour the waste liquid into the filtering device, and let the waste liquid pass through the filter screen to remove suspended asphalt and solid impurities.

[0087] Step 4.3: In the waste liquid after filtration treatment, add activated carbon at a ratio of 5 - 10 g / L, stir well to make the activated carbon completely adsorb the soluble asphalt colloid. After the stirring and adsorption are completed, use the filtering device to filter the waste liquid again to remove the activated carbon adsorbed with asphalt colloid. The remaining waste liquid meets the laboratory sewage discharge standard and can be directly discharged.

[0088] Implementation example 2:

[0089] Step 1: Preparation of samples

[0090] Step 1.1: Select 70# petroleum asphalt and limestone aggregates to prepare asphalt mixture. Heat the 70# petroleum asphalt to 150 °C, and heat the limestone aggregate particles to 160 °C after being cleaned and dried. The designed asphalt content is 5%. Put 950 g of aggregates into an enamel tray, add 50 g of 70# base asphalt, and stir evenly (hand mixing) for 1 min - 1.5 min.

[0091] Step 1.2: After hot mixing, pour the asphalt mixture sample onto a clean and dry tray, and use tools such as a shovel to spread the mixture into granular form, trying to avoid the mixture from agglomerating or piling up locally.

[0092] Step 1.3: Wait for the asphalt mixture sample to cool to room temperature, and use a balance with a precision of 0.1 g to weigh 500 g of the asphalt mixture sample, denoted as m1.

[0093] Step 2: Physical separation of asphalt and aggregates

[0094] Step 2.1: Put the weighed asphalt mixture sample into the sieve in the ultrasonic cleaning instrument, add water to cover the sample, set the water temperature to 60 °C, frequency to 40 kHz, power to 160 W, and time to 30 min, and use the ultrasonic cavitation effect and mechanical vibration to separate asphalt from aggregates.

[0095] Step 2.2: After the vibration ends, take out the sieve mesh, clean the aggregate in the sieve mesh, put it into an oven to dry, take it out and cool it to room temperature, and weigh the mass of the aggregate with a balance with an accuracy of 0.1 g. This mass is m2 = 475.2 g.

[0096] Step 3: Measure the asphalt content

[0097] From the mass of the asphalt mixture sample m1 = 500 g and the mass of the separated aggregate m2 = 475.1 g, calculate the asphalt content according to the above formula. The results are as follows:

[0098]

[0099] From the results, it can be seen that the measured asphalt content is 4.98%, slightly lower than the design value of 5%. The reason for the error may be that a small amount of asphalt is not completely separated, but the error range is ±0.3%, which meets the requirements of on-site rapid detection.

[0100] Step 4: Environmental protection treatment

[0101] Step 4.1: After taking out the sieve mesh, continue to let it stand still until the asphalt particles settle to the bottom of the instrument and are initially separated from the water, and pour the upper-layer waste liquid of the cleaning instrument into a glass instrument.

[0102] Step 4.2: Install a filter screen with a pore size ≤ 0.075 mm on the filtering device, slowly pour the waste liquid into the filtering device, and let the waste liquid pass through the filter screen to remove suspended asphalt and solid impurities.

[0103] Step 4.3: In the waste liquid after filtration treatment, add activated carbon at a ratio of 5 - 10 g / L, stir well to make the activated carbon completely adsorb the soluble asphalt colloid. After the stirring and adsorption are completed, use the filtering device to filter the waste liquid again to remove the activated carbon adsorbed with asphalt colloid. The remaining waste liquid meets the laboratory sewage discharge standard and can be directly discharged.

[0104] See Figures 2 to 4 , this embodiment also discloses an ultrasonic cleaner for ultrasonic cleaning and separation of the asphalt mixture sample described in any one of this embodiment.

[0105] Existing ultrasonic cleaners can all meet the requirements of asphalt separation in the embodiments of the present invention.

[0106] Ultrasonic waves generate high-frequency vibrations and cavitation effects in liquids, forming microjets and shock waves, which can quickly destroy the adhesion between asphalt and aggregates and accelerate asphalt stripping. Compared with the traditional centrifugal extraction method (requiring long-term soaking and mechanical stirring), ultrasonic cleaning can shorten the separation time by more than 50%. Through the combination of a sieve and ultrasonic vibrations, the separated aggregates can be immediately separated from the asphalt solution, avoiding repeated contamination. The traditional extraction method needs to use trichloroethylene solvent to dissolve asphalt, but the solvent residue may affect the quality measurement of the aggregates after drying; while ultrasonic cleaning only uses water medium, and the aggregates are more likely to reach a constant weight state after drying in an oven, reducing systematic errors. The traditional centrifugal method may cause aggregate breakage, affecting the weighing accuracy. Ultrasonic vibrations separate asphalt in a non-destructive manner, preserving the integrity of the aggregates and ensuring that the weighing results more truly reflect the quality of the original aggregates.

[0107] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A non-destructive testing method for asphalt content based on ultrasonic vibration, characterized in that, It includes the following steps: Obtain the weight of the asphalt mixture sample to be tested, denoted as m1; Perform ultrasonic cleaning and separation on the asphalt mixture sample to obtain the separated asphalt and aggregate; Dry the aggregate, and denote the weight of the dried aggregate as m2; Calculate the asphalt content based on the weight m1 of the asphalt mixture sample and the weight m2 of the aggregate.

2. The non-destructive testing method for asphalt content based on ultrasonic vibration according to claim 1, wherein The obtaining of the weight of the asphalt mixture sample to be tested, denoted as m1, includes: Prepare the asphalt mixture sample; After the prepared asphalt mixture sample is cooled to room temperature, weigh the asphalt mixture sample.

3. The non-destructive testing method for asphalt content based on ultrasonic vibration according to claim 2, characterized in that, The performing of ultrasonic cleaning on the asphalt mixture sample to obtain the separated asphalt and aggregate includes: Put the weighed asphalt mixture sample into the screen of the ultrasonic cleaner, add water into the ultrasonic cleaner until the water covers the asphalt mixture sample, then start the ultrasonic cleaner, and use the ultrasonic cavitation effect and mechanical vibration of the ultrasonic cleaner to separate the asphalt from the aggregate; After the vibration ends, take out the aggregate in the screen, clean the aggregate, put the cleaned aggregate into the oven for drying, cool it to room temperature after drying, and weigh the aggregate, denoted as m2.

4. The non-destructive detection method for asphalt content based on ultrasonic vibration according to claim 3, wherein, When the ultrasonic cleaner cleans the asphalt mixture sample, the parameters include: The water temperature is 55°C - 65°C, the frequency is 28 kHz - 40 kHz, the power is 150 W - 180 W, and the time is 30 min - 40 min.

5. A non-destructive testing method for asphalt content based on ultrasonic vibration according to claim 1, characterized in that, The calculating of the asphalt content based on the weight m1 of the asphalt mixture sample and the weight m2 of the aggregate includes: Where P represents the asphalt content; m1 represents the mass of the asphalt mixture sample before separation; m2 represents the mass of the aggregate after separation.

6. A non-destructive testing method for asphalt content based on ultrasonic vibration according to claim 1, characterized in that, When calculating the asphalt content, it also includes: Perform solid-liquid separation on the asphalt particles in the separated liquid until the waste liquid reaches the discharge standard and is discharged.

7. An ultrasonic vibration-based non-destructive testing method for asphalt content according to claim 6, characterized in that, The performing of solid-liquid separation on the asphalt particles in the separated liquid includes: Let the waste liquid in the instrument stand still, so that the larger asphalt particles in the waste liquid settle to the bottom of the instrument for preliminary separation from the water; Filter the waste liquid to remove suspended asphalt and solid impurities; Add activated carbon to the waste liquid to make the activated carbon adsorb dissolved asphalt colloid. After the adsorption is completed, filter the waste liquid again to remove the activated carbon adsorbed with asphalt colloid, and discharge the remaining waste liquid.

8. A non-destructive testing method for asphalt content based on ultrasonic vibration according to claim 7, characterized in that, When filtering the waste liquid to remove suspended asphalt and solid impurities, filter through a filter screen, and the pore diameter of the filter screen ≤ 0.075 mm.

9. The non-destructive detection method for asphalt content based on ultrasonic vibration according to claim 7, characterized in that, When adding activated carbon, the ratio of activated carbon to waste liquid is to add 5 - 10 g of activated carbon per 1 L of waste liquid.

10. An ultrasonic cleaner, characterized in that, It is used for ultrasonic cleaning and separation of the asphalt mixture sample according to any one of claims 1 - 9.

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