CN109164008B - Asphalt solubility testing method - Google Patents
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Abstract
The invention relates to a method for testing asphalt solubility. The test method comprises the following steps: 1: taking an asphalt sample, wrapping the asphalt sample by using a filtering device, and weighing the asphalt sample and the filtering device; 2: soaking the filter device wrapped with the asphalt sample in trichloroethylene, and standing for the first time to enable the trichloroethylene to be in contact with the asphalt sample; 3: controlling a filtering device wrapped with an asphalt sample to perform periodic motion in trichloroethylene, and then removing the obtained asphalt dissolving solution; 4: taking trichloroethylene again, soaking the filter device wrapped with the asphalt sample in the trichloroethylene again for periodic movement, standing for the second time, and then removing the obtained asphalt dissolving solution; 5: repeating the step 4 until the obtained asphalt dissolving solution is clear, obtaining a filter device containing insoluble substances, obtaining the weight of the insoluble substances, and calculating the solubility of the asphalt sample. The testing method can effectively improve the working efficiency of the test.
Description
Technical Field
The invention relates to a method for testing asphalt solubility, and belongs to the field of road material performance testing.
Background
The asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and nonmetal derivatives thereof, is one of high-viscosity organic liquids, is in a liquid state, has a black surface, and is soluble in carbon disulfide.
In the prior art, two methods are generally adopted to test the solubility of asphalt, 1) an asphalt solubility test method (hereinafter referred to as a "rule method") specified in T0607-2011 can be used, and the solubility of asphalt can be tested by referring to the test method in the existing JTG E20-2011 in the specific test process; 2) a water bath heating method: the trichloroethylene solvent is first heated and then used to dilute the dissolved asphalt sample. The heating temperature of the solvent is controlled within 80 ℃ in general, and the solvent volatilization (the boiling point of trichloroethylene is 85 ℃) caused by overhigh temperature is prevented.
The regulation method is more suitable for the petroleum asphalt of high-grade roads. For asphalt with low solubility, the time for determining the solubility is long, even if the asphalt is soaked for a few days and is difficult to filter, and the test cannot be normally finished. For example: the test efficiency of SBS (I-D) modified asphalt, high viscosity modified asphalt, rubber asphalt, lake asphalt and the like is low, and sometimes, the test work can not be completed for more than three days. Some asphalt can not be effectively dissolved by repeatedly washing with trichloroethylene, so that the solvent consumption is large, and manpower and material resources are consumed. In addition, the protocol method has excessive odor during the test operation, so that the testers are easy to have uncomfortable reactions, and part of the test is forced to be terminated. The water bath heating method adopts a heating method for the dissolving process, so that the trichloroethylene is seriously volatilized, the personal safety of operators is not good, and in addition, the effect of accelerating the dissolving is not obvious under the water bath heating condition.
Disclosure of Invention
Problems to be solved by the invention
In view of the technical problems in the prior art, for example: the trichloroethylene is repeatedly washed, so that the trichloroethylene cannot be effectively dissolved, the using amount of the solvent is large, and manpower and material resources are consumed; the odor is too big in the test operation process, so that the testers are easy to generate uncomfortable reactions, and part of tests are forced to be terminated; in addition, when a heating method is adopted in the dissolving process, the trichloroethylene is seriously volatilized, and the personal safety of operators is not ensured. The invention provides a method for testing asphalt solubility, which can effectively improve the working efficiency of a test, greatly reduce the consumption of a solvent and simultaneously has good test precision and parallelism.
Means for solving the problems
The invention provides a method for testing asphalt solubility, which comprises the following steps:
step 1: taking an asphalt sample, wrapping the asphalt sample by using a filtering device, and weighing the asphalt sample and the filtering device;
step 2: soaking the wrapped asphalt sample in trichloroethylene, and standing for one time to enable the trichloroethylene to be in contact with the asphalt sample;
and step 3: controlling the filter device wrapped with the asphalt sample to perform periodic movement in trichloroethylene, and then removing the obtained asphalt dissolving solution;
and 4, step 4: taking trichloroethylene again, soaking the filter device wrapped with the asphalt sample in the trichloroethylene again for periodic movement, then standing for the second time, and removing the obtained asphalt dissolving solution;
and 5: repeating the step 4 until the obtained asphalt dissolving solution is clear, obtaining a filtering device containing insoluble substances, and then obtaining the weight of the insoluble substances to calculate the solubility of the asphalt sample.
The method for testing the solubility of asphalt according to the present invention, wherein in the step 2, the time for the first standing is 1 to 120min, preferably 6 to 60 min.
The method for testing the solubility of asphalt according to the present invention, wherein in the step 3, the periodic movement is performed for 1 to 10min, preferably 3 to 5 min.
The method for testing the solubility of the asphalt comprises the following steps of (1) performing periodic movement for 5-10min in the step 4; the time of the secondary standing is 1-60min, preferably 5-30 min.
The method for testing the solubility of asphalt according to the present invention, wherein the step 5 further comprises drying and weighing the insoluble-containing filtering device to obtain the weight of the insoluble-containing filtering device.
The asphalt solubility testing method further comprises the step of washing the filter device containing the insoluble substances by using trichloroethylene before the drying so as to completely dissolve the asphalt sample.
The method for testing the asphalt solubility according to the present invention further comprises filtering out the asphalt dissolution solution in the filtering device containing the insoluble substances before the drying.
The asphalt solubility test method comprises the step of placing the filtering device containing the insoluble substances in a ventilated place for drying so as to remove excessive trichloroethylene in the filtering device containing the insoluble substances.
The method for testing the solubility of the asphalt comprises the following steps of placing the filtering device containing the insoluble substances in drying equipment for heating and drying;
preferably, the temperature for heating and drying is 90-120 ℃, preferably 100-110 ℃; the time for the heat drying is at least 10min, preferably at least 20 min.
According to the method for testing the solubility of asphalt, the asphalt comprises the following components: one or more than two of road petroleum asphalt, natural asphalt, tar asphalt and modified asphalt; the filter device comprises filter paper;
preferably, the road petroleum asphalt comprises one or a combination of more than two of low-grade road petroleum asphalt and 70# -200 # road petroleum asphalt; the natural asphalt comprises one or the combination of more than two of lake asphalt, rock asphalt and seabed asphalt;
the modified asphalt comprises one or the combination of more than two of SBS modified asphalt, rubber asphalt, natural asphalt modified asphalt and high-viscosity modified asphalt.
ADVANTAGEOUS EFFECTS OF INVENTION
The asphalt solubility testing method can effectively improve the testing work efficiency, greatly reduce the consumption of the solvent and simultaneously has good testing error, precision and parallelism.
Furthermore, the asphalt solubility testing method is simple and easy to implement, can reduce the testing cost, and can ensure the operation safety of testing personnel.
Further, the asphalt solubility test method of the present invention is applicable to a hardly soluble asphalt, such as: high viscosity modified asphalt, lake asphalt, hard asphalt, and the like.
Detailed Description
Various exemplary embodiments, features and aspects of the invention will be described in detail below. The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In other instances, methods, means, devices and steps which are well known to those skilled in the art have not been described in detail so as not to obscure the invention.
The invention relates to a method for testing asphalt solubility, which comprises the following steps:
step 1: taking an asphalt sample, wrapping the asphalt sample by using a filtering device, and weighing the asphalt sample and the filtering device;
step 2: soaking the filter device wrapped with the asphalt sample in trichloroethylene so that the trichloroethylene is in contact with the asphalt sample, and standing for the first time;
and step 3: controlling the filter device wrapped with the asphalt sample to perform periodic motion (such as whipping, shaking and the like) in trichloroethylene, and then removing the obtained asphalt dissolving solution;
and 4, step 4: taking trichloroethylene again, soaking the filter device wrapped with the asphalt sample in the trichloroethylene again for periodic movement, then standing for the second time, and removing the obtained asphalt dissolving solution;
and 5: repeating the step 4 until the obtained asphalt dissolving solution is clear, obtaining a filtering device containing insoluble substances, and then obtaining the weight of the insoluble substances to calculate the solubility of the asphalt sample.
In step 1 of the present invention, when the filtration device is used to wrap the asphalt sample, the filtration device can be used to tightly wrap the asphalt sample and ensure that the asphalt sample does not leak, so that the asphalt sample can be completely dissolved without loss of the sample.
In addition, in step 1, during weighing, the asphalt sample can be placed on dry and clean release paper (release paper) first, so that the quality of the asphalt sample can be accurately weighed. The bitumen sample is then transferred to a filtration device and weighed together to obtain the weight of the bitumen sample and the filtration device. The asphalt sample and the filter unit may also be weighed separately.
In step 2, a container containing trichloroethylene, for example (a beaker, etc.), may be taken and the filter unit may be gripped by tweezers and then placed in the container, and the filter unit wrapped with the asphalt sample is soaked in trichloroethylene and allowed to stand for one time so that the trichloroethylene is in contact with the asphalt sample. The invention can lead the trichloroethylene to permeate the filtering device by carrying out one-time standing. The trichloroethylene is fully contacted with the asphalt sample, so that the purpose of standing, soaking and melting can be achieved, and the asphalt sample can be well and completely dissolved. Preferably, in step 2 of the present invention, the time for the one-time standing is 1 to 120min, preferably 6 to 60 min.
In step 3, tweezers can be used to grip the filter device wrapped with the asphalt sample to control the filter device wrapped with the asphalt sample to perform periodic movement in trichloroethylene, and after a period of movement, the obtained asphalt dissolving solution is removed. When the filter device is clamped by tweezers, the filter device can continuously shake in trichloroethylene, so that the filter device wrapped with the asphalt sample is controlled to periodically move in the trichloroethylene. Note that no solution was spilled during the periodic movement of the filter unit wrapped with the bitumen sample in trichloroethylene. Preferably, the time for controlling the periodic movement of the filter device wrapped with the sample of asphalt in trichloroethylene may be generally 1 to 10min, preferably 3 to 5 min.
In step 4, the trichloroethylene is taken again, the filtering device wrapped with the asphalt sample is soaked in the trichloroethylene again for periodic movement, then secondary standing is carried out, and the obtained asphalt dissolving solution is removed, so that the asphalt sample is dissolved completely. Preferably, in step 4, the time of the periodic movement may be 5-10 min.
In the invention, the purpose of secondary standing is to enable the undissolved asphalt sample to be fully contacted with trichloroethylene, so that the purpose of standing, soaking and melting can be further achieved, and the asphalt sample can be better and completely dissolved. Preferably, the time for the second standing is 1-60min, preferably 5-30 min.
In step 5, repeating step 4 until the obtained asphalt dissolving solution is clarified, obtaining a filtering device containing insoluble substances, and then obtaining the weight of the insoluble substances to calculate the solubility of the asphalt sample. The solubility of the asphalt sample can be calculated by observing whether the obtained asphalt dissolving solution is clear (colorless and transparent), determining whether the asphalt sample in the filtering device is completely dissolved, and obtaining the weight of insoluble substances after the asphalt sample is completely dissolved.
Generally, when the filter device wrapped with the asphalt sample is placed in a container by using tweezers to clamp the filter device, the liquid level of trichloroethylene added into the container is not higher than the clamping position of the tweezers, and then the tweezers are shaken to make the filter device wrapped with the asphalt sample perform periodic motion in the trichloroethylene. Preferably, when adding trichloroethylene again to repeat step 4, the filter unit wrapped with the asphalt sample is controlled to perform periodic movement in the trichloroethylene for 5-10 min.
Further, in order to obtain accurate solubility, step 5 of the present invention may further comprise drying and weighing the insoluble-containing filtration device to obtain the weight of the insoluble-containing filtration device. In the present invention, the method may further comprise, before the drying, cleaning the filtration device containing the insoluble substances with trichloroethylene, so as to further ensure that the residual asphalt sample is completely dissolved.
Furthermore, the method can also comprise filtering out the asphalt dissolved solution in the filtering device containing the insoluble substances before drying, thereby reducing the generation of toxic gas in the drying device and reducing the operation risk of testers. In general, filtration may be performed using a funnel, or filtration may be performed using a suction filtration apparatus, and the filtration may be selected as needed.
Further, the drying process can also comprise the step of placing the filtering device containing the insoluble substances at a ventilation position for drying control so as to remove redundant trichloroethylene in the filtering device containing the insoluble substances, and the generation of toxic gas in the drying device can be further reduced, so that the operation safety of testers is ensured.
Further, the drying comprises the step of placing the filtering device containing the insoluble substances in a drying device for heating and drying; specifically, the temperature for heating and drying is 90-120 ℃, preferably 100-110 ℃; the time for the heat drying is at least 10min, preferably at least 20min, more preferably at least 30 min. By means of heating and drying, the solubility of the asphalt can be accurately calculated, and errors of test results are reduced.
The asphalt comprises: one or more of road petroleum asphalt, natural asphalt, tar asphalt, modified asphalt and the like. In general, filter paper may be used for the filter device, although other devices capable of carrying out the present invention may be used.
Preferably, the road petroleum asphalt comprises one or more of low-grade road petroleum asphalt, 70# -200 # road petroleum asphalt and the like;
the natural asphalt comprises one or more of lake asphalt, rock asphalt, seabed asphalt and the like;
the modified asphalt comprises: one or the combination of more than two of SBS modified asphalt, rubber asphalt, natural asphalt modified asphalt, high viscosity modified asphalt and the like.
Wherein the low-grade asphalt is 50# road petroleum asphalt and road petroleum asphalt smaller than 50# road petroleum asphalt, such as hard asphalt and the like; the 70# to 200# road petroleum asphalt is 70# road petroleum asphalt, 90# road petroleum asphalt, 110# road petroleum asphalt, 130# road petroleum asphalt, 160# road petroleum asphalt, 200# road petroleum asphalt and the like.
The method can effectively improve the working efficiency of the test, greatly reduce the consumption of the solvent trichloroethylene, and simultaneously has good test precision and parallelism.
Compared with the prior method, the method can better ensure the test quality, improve the test efficiency and ensure good test result parallelism for the asphalt (such as hard asphalt, high-viscosity modified asphalt, natural asphalt modified asphalt, lake asphalt, rubber asphalt and the like) with the solubility of less than 99 percent. Therefore, the invention has stronger applicability to asphalt with the solubility of less than 99 percent, small error of test results and high precision; has important engineering value on the timeliness of the quality control of the asphalt product.
In addition, the method greatly reduces the volume consumption of the trichloroethylene (compared with the original method, the volume consumption of the trichloroethylene is reduced by at least 50%), and the test completion time can be shortened to be within 6 hours, so that the test cost is reduced, and the operation safety of testers is ensured.
Examples
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
(1) Weighing about 2g of 70# road petroleum asphalt sample as an asphalt sample by taking a piece of dry and clean release paper, and accurately obtaining 0.1 mg;
(2) weighing a piece of clean filter paper by using an analytical balance, and putting a prepared asphalt sample on the filter paper for weighing;
(3) folding the filter paper, tightly wrapping the asphalt sample, and ensuring that the asphalt sample does not leak;
(4) clamping the filter paper wrapping the asphalt sample by using tweezers in a small beaker, soaking the filter paper in 50mL of trichloroethylene, and standing for 30 min;
(5) after standing for 30min, clamping the filter paper wrapped with the asphalt sample by using tweezers, shaking in a trichloroethylene solvent for 5min continuously, collecting turbid asphalt solution in a waste liquid bottle, and paying attention to the fact that no liquid is sprayed out in the shaking process;
(6) adding trichloroethylene into the small beaker again, wherein the liquid level is not higher than the clamping position of the tweezers, continuously clamping the filter paper wrapped with the asphalt sample by the tweezers, shaking the filter paper in the trichloroethylene for 5min, standing the filter paper for 10min, and collecting turbid asphalt solution in a waste liquid bottle;
(7) repeating the step (6) until the asphalt dissolving solution is colorless and transparent to obtain filter paper containing insoluble substances;
(8) placing a funnel on an asphalt dissolved solution collecting bottle, clamping the filter paper containing the insoluble substances from the asphalt dissolved solution, placing the filter paper in the funnel, and filtering to dry the redundant asphalt dissolved solution in the filter paper containing the insoluble substances;
(9) taking out the filter paper containing the insoluble substances, and placing the filter paper in a ventilated place until no solvent smell exists so as to remove the excessive trichloroethylene; then, the mixture is placed in a small beaker and moved into an oven with a set temperature of 105 ℃ +/-5 ℃ for at least 20min, the used filter paper is dried, and the mass of the filter paper containing the insoluble substances and the beaker are weighed.
(10) The experiment was repeated once and then using formula (I):
solubility (S)b) Mass of [ 1-insoluble substance (m)1) Mass of bitumen sample (m)0)]×100％(I)
The solubility of the asphalt samples in the two tests was calculated, and the specific results are shown in table 1.
In addition, according to the method of the present invention, no insoluble matter is present in the beaker during dissolution, and the results of weighing the beaker twice before and after use are the same.
In a specific experiment: the same sample is tested at least twice in parallel, and when the difference between the two test results of the asphalt with higher solubility is not more than 0.1%, the average value is taken as the test result. For asphalt with low solubility (such as natural asphalt modified asphalt, rubber asphalt or lake asphalt), the actual operation is difficult to ensure the uniformity and the representativeness due to the small sampling amount per se (about 2 g), thereby causing large test errors. Therefore, when the difference between the two test results of the natural asphalt modified asphalt, the rubber asphalt or the lake asphalt which are difficult to dissolve is not more than 3%, the average value is taken as the test result. For test results with solubility greater than 99.0%, accuracy is 0.01%; for test results with a solubility of less than or equal to 99.0%, the accuracy is up to 0.1%.
Tolerance error:
the tolerance of the reproducibility or reproducibility test in the solubility determination corresponds to the requirements of Table A:
TABLE A
| Solubility (%) | Repeatability (%) | Reproducibility (%) |
| ＞99.0 | 0.1 | 0.26 |
| 90.0～99.0 | 1 | 2 |
| ≤90.0 | 3 | 5 |
Example 2
The 70# road petroleum asphalt sample was replaced with SBS modified asphalt, and the solubility of SBS modified asphalt was tested in the same way as in example 1, with the specific results shown in Table 1.
Example 3
The 70# road petroleum asphalt sample was replaced with natural asphalt modified asphalt-C, and the solubility of the natural asphalt modified asphalt-C was measured in the same manner as in example 1, with the specific results shown in Table 1.
TABLE 1
Example 4
The 70# road petroleum asphalt sample of example 1 was replaced with lake asphalt, and the solubility of the lake asphalt was measured in the same manner as in example 1, with the specific results shown in Table 2.
Example 5
The 70# road petroleum asphalt sample of example 1 was replaced with the natural asphalt-modified asphalt-H, and the solubility of the natural asphalt-modified asphalt-H was measured in the same manner as in example 1, with the results shown in Table 2.
Example 6
The 70# road petroleum asphalt sample of example 1 was replaced with the high viscosity modified asphalt, and the solubility of the high viscosity modified asphalt was measured in the same manner as in example 1, with the specific results shown in table 2.
TABLE 2
Comparative example 1
1. A70 # road petroleum asphalt sample is prepared as an asphalt sample according to the JTG E20-2011 test procedure for road engineering asphalt and asphalt mixture (the procedure for short).
2. Placing glass fiber filter paper (hereinafter referred to as filter paper) at the bottom of a clean weighing bottle, washing the filter paper and the weighing bottle with trichloroethylene to volatilize the trichloroethylene, drying in a drying oven at 105 ℃ +/-5 ℃ to constant weight (generally 15min), transferring into a dryer for cooling for at least 30min, and weighing the mass (m is m1) Accurate to 0.1 mg.
3. The mass (m) of a previously dried Erlenmeyer flask is weighed2) Accurate to 0.1 mg.
4. Weighing and leaching with a pre-dried conical flaskCyan sample about 2g (m)3) Accurate to 0.1 mg.
5. Under continuous shaking, 100mL of trichloroethylene is added into the conical flask in times until the sample is fully dissolved, then the bottle stopper is covered, and the conical flask is placed for at least 15min at room temperature.
7. Mounting the weighed filter paper and a weighing bottle on a filter flask, and wetting the filter paper by using a small amount of trichloroethylene; then, carefully pouring the asphalt sample solution in the conical flask into filter paper along a glass rod, and filtering at a continuous dripping speed until all the solution is completely filtered; washing the conical flask and the glass rod with a small amount of trichloroethylene in a plurality of times, and transferring all insoluble substances into a weighing bottle; the filter paper was washed with trichloroethylene again until the filtrate was colorless and transparent, and the filter paper and the insoluble matter on the filter paper were transferred to a weighing bottle.
8. Taking out the weighing bottle, the filter paper and the insoluble substances in the step 7, and placing the weighing bottle, the filter paper and the insoluble substances in a ventilated place until no solvent odor exists; then, transferring the weighing bottle, the filter paper and the insoluble substances into an oven with the temperature of 105 +/-5 ℃ for at least 20 min; meanwhile, the original conical flask and the like are also placed in an oven to be dried to constant weight.
9. Taking out the dried weighing bottle, the filter paper and the insoluble substances, placing the weighing bottle, the filter paper and the insoluble substances in a dryer for cooling for 30min +/-5 min, and weighing the total mass m of the weighing bottle, the filter paper and the insoluble substances4Until the difference between the successive weighings was not more than 0.3 mg.
10. Computing
The solubility of the asphalt samples was calculated according to formula (II), and the calculation results are shown in Table 3.
In the formula: sb-solubility (%) of bitumen samples;
m1-weighing the total mass (g) of the bottle and the filter paper;
m2-erlenmeyer flask mass (g);
m3-total mass of erlenmeyer flask and bitumen sample (g);
m4-weighing the total mass (g) of the bottle, filter paper and insolubles;
comparative example 2
The 70# road petroleum asphalt sample of comparative example 1 was replaced with SBS modified asphalt, and the solubility of SBS modified asphalt was tested in the same way as in comparative example 1, with the specific results shown in Table 3.
Comparative example 3
The 70# road petroleum asphalt sample of comparative example 1 was replaced with the natural asphalt-modified asphalt-C, and the solubility of the natural asphalt-modified asphalt-C was tested in the same manner as in comparative example 1, with the specific results shown in Table 3.
TABLE 3
As can be seen from examples 1-2 and comparative examples 1-2, for the asphalt with the asphalt solubility of more than 99%, the method can accurately detect the solubility of the asphalt sample, and the solubility is equivalent to the solubility measured by the method of comparative examples 1-2, and the test precision and the parallelism are good. However, the method of the invention can effectively improve the test working efficiency, greatly reduce the consumption of the solvent trichloroethylene and reduce the volume consumption of the trichloroethylene by about 50 percent.
As can be seen from example 3 and comparative example 3, when the modified asphalt-C of natural asphalt is detected, compared with the original method, the method of the invention can well ensure the test quality, improve the test efficiency, have good test result parallelism and greatly reduce the consumption of trichloroethylene as a solvent for the modified asphalt with the solubility of less than 99%.
As can be seen from examples 4-5, the asphalt solubility test method of the present application can also accurately test the solubility of lake asphalt and natural asphalt modified asphalt-H, which are difficult to detect by the existing method, and has the advantages of high test precision, good test quality guarantee, high test efficiency and good test result parallelism.
In addition, as can be seen from example 6, the method of the present application can also test the solubility of the high viscosity modified asphalt, and the test result is accurate and reliable.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (14)
1. The asphalt solubility test method is characterized by comprising the following steps:
step 1: taking an asphalt sample, wrapping the asphalt sample by using a filtering device, and weighing the asphalt sample and the filtering device;
step 2: soaking the filter device wrapped with the asphalt sample in trichloroethylene, and standing for the first time to enable the trichloroethylene to be in contact with the asphalt sample;
and step 3: controlling the filter device wrapped with the asphalt sample to perform periodic movement in trichloroethylene, and then removing the obtained asphalt dissolving solution;
and 4, step 4: taking trichloroethylene again, soaking the filter device wrapped with the asphalt sample in the trichloroethylene again for periodic movement, standing for the second time, and then removing the obtained asphalt dissolving solution;
and 5: repeating the step 4 until the obtained asphalt dissolving solution is clear, obtaining a filtering device containing insoluble substances, and then obtaining the weight of the insoluble substances to calculate the solubility of the asphalt sample;
in the step 2, the time for the first standing is 1-120 min; in the step 3, the time for periodic movement is 1-10 min.
2. The method for testing asphalt solubility according to claim 1, wherein in the step 2, the time for the first standing is 6 to 60 min.
3. The method for testing asphalt solubility according to claim 1, wherein in the step 3, the periodic movement is performed for 3-5 min.
4. The method for testing solubility of asphalt according to any of claims 1 to 3, wherein in the step 4, the periodic movement is performed for 5 to 10 min; the time of the secondary standing is 1-60 min.
5. The method for testing asphalt solubility according to claim 4, wherein in the step 4, the time for the second standing is 5-30 min.
6. The method for testing solubility of asphalt according to any one of claims 1 to 3, wherein the step 5 further comprises drying and weighing the filter device containing the insolubles to obtain the weight of the insolubles.
7. The method for testing asphalt solubility according to claim 6, further comprising, before the drying, washing the filter device containing the insoluble substances with trichloroethylene to completely dissolve the asphalt sample.
8. The method for testing asphalt solubility according to claim 6, further comprising filtering out the asphalt dissolving solution in the filtering device containing insoluble substances before the drying.
9. The asphalt solubility test method according to claim 6, wherein the drying comprises placing the filter device containing the insoluble substances in a ventilation place for drying so as to remove the excessive trichloroethylene in the filter device containing the insoluble substances.
10. The method for testing solubility of asphalt according to claim 6, wherein the drying comprises placing the insoluble-substance-containing filter device in a drying apparatus for drying by heating.
11. The method for testing the solubility of asphalt according to claim 10, wherein the temperature of the heat drying is 90-120 ℃, and the time of the heat drying is at least 10 min.
12. The method for testing asphalt solubility according to claim 11, wherein the temperature of the heat drying is 100 ℃ and 110 ℃, and the time of the heat drying is at least 20 min.
13. The method for testing solubility of asphalt according to any one of claims 1 to 3, the asphalt comprising: one or more than two of road petroleum asphalt, natural asphalt, tar asphalt and modified asphalt; the filter device comprises filter paper.
14. The asphalt solubility test method according to claim 13, wherein the road petroleum asphalt comprises one or a combination of two or more of low-grade road petroleum asphalt and 70# to 200# road petroleum asphalt;
the natural asphalt comprises one or the combination of more than two of lake asphalt, rock asphalt and seabed asphalt;
the modified asphalt comprises one or the combination of more than two of SBS modified asphalt, rubber asphalt, natural asphalt modified asphalt and high-viscosity modified asphalt.
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