CN105300845A - Asphalt regenerating agent diffusion test device and testing method - Google Patents

Abstract

Asphalt regenerant diffusion test device and test method, the invention relates to a test device and an application method for evaluating the diffusion performance of asphalt regenerant, which aims to solve the problem that there is no relevant experimental device and evaluation method for the diffusion of asphalt regenerant. The test device includes a dissolution barrel, a sample holder, a collection device, a liquid inlet pipe and a liquid outlet pipe. The test method is to firstly treat the asphalt sample with the regenerated agent standing still, weigh the asphalt sample and measure the height of the sample, add trichlorethylene to clean the asphalt, repeat the cleaning process several times, and measure the discharged liquid and solid phase. According to the four components of the compound, the relative content of the regenerant is calculated, and then the diffusion rate of the regenerant is obtained through the diffusion depth. The present invention utilizes the characteristic of high solubility of trichlorethylene to asphalt, adopts the method of layered dissolution to gradually dissolve the asphalt sample treated with the regenerant, and then conducts an investigation on the diffusion characteristics of the regenerant according to the composition analysis results of the dissolved solution. analyze.

Description

Asphalt regenerant diffusion test device and test method

technical field

The invention relates to a test device for evaluating the diffusion performance of an asphalt regenerant and an application method thereof.

Background technique

The large-scale construction of my country's highways dates back to the mid-1980s. After more than 30 years of construction, by 2015, the total mileage of my country's highways reached more than 4.5 million kilometers, of which 108,000 kilometers were expressways, 80% of which were asphalt concrete. pavement. Up to now, a considerable number of asphalt pavements have reached the end of their service life and are facing large-scale maintenance and even reconstruction. In addition, with the continuous development of my country's transportation industry, the rapid growth of traffic volume and vehicle load has caused the newly-built roads to be damaged to a certain extent in a short period of time, and necessary maintenance work is urgently needed to prolong the service life of the roads. Generally speaking, the service life of roads in my country is generally not long, and routine maintenance is required soon after construction is completed. However, the separation of construction and maintenance of highways in my country still exists, and it is still difficult to solve. How to integrate the concept of the whole life cycle into the construction, maintenance and operation of highways has become an urgent problem to be solved in the highway industry.

For new asphalt pavement, under the action of temperature and oxygen, asphalt materials will undergo a certain degree of short-term aging during the process of mixing, transportation and paving and compaction. Although this process lasts for a short time, it has a great impact on asphalt performance. It produces huge damage. According to some studies, the needle penetration after short-term aging is only 60%-75% of the original value. However, the newly compacted asphalt pavement has a certain degree of permeability because the surface voids have not been blocked. Before opening to traffic, a large amount of air and water permeate into the newly-built asphalt pavement, which will also accelerate the aging of the newly-built pavement.

For the old asphalt pavement, under the influence of external factors such as ultraviolet radiation, high temperature oxidation, water erosion, traffic wear, etc., the asphalt will continue to be aged, which will cause fatigue cracking, potholes and other pavement diseases. This long-term aging process continues to degrade the performance of asphalt pavements.

Asphalt rejuvenator mainly uses petroleum refining materials, and its application purpose is mainly to adjust and improve the component imbalance of asphalt materials due to short-term aging of new roads or long-term aging of old roads, and quickly restore the designed performance of asphalt pavement. In order to repair the aged asphalt pavement material, improve the appearance and performance of the pavement, delay the aging process of the asphalt pavement, so as to prolong the service life of the pavement and reduce the maintenance cost.

Since the current rejuvenator products have been verified for many years, there is basically no problem with their ability to "soften" aged asphalt. However, whether the rejuvenator can penetrate and diffuse into the asphalt has an important effect on the recovery of asphalt pavement performance. It can be said that the regeneration effect of the regenerant depends largely on the degree of penetration and diffusion. With the change of regenerant spraying amount, penetration time, asphalt mixture porosity, crack density and other factors, the penetration depth is different. Most roads in our country are dense and impermeable, and the surface becomes denser after repeated rolling by vehicles, and the infiltration effect is relatively weak. Therefore, the regenerative mist seal layer can play a better regenerative effect in a long period of time, mainly relying on the diffusion of the regenerative agent. Therefore, it is generally believed in the world that whether regenerants (including regenerant materials used for cold and hot regeneration) can achieve a good "regeneration" effect has an important relationship with the depth of regenerant influence. Therefore, the research on the diffusion of regenerants is a It is very necessary and very meaningful.

However, there is no relevant experimental device and means to analyze the diffusion process and law of the regenerant. On this basis, a set of experimental device and its application method for the diffusion test have been developed to meet the needs of related research.

Contents of the invention

The purpose of the present invention is to provide asphalt rejuvenator diffusion test device and test method in order to solve the problem that there is no relevant experimental device and evaluation method for the diffusion of asphalt regenerant.

The asphalt regenerant diffusion test device of the present invention comprises a dissolving barrel, a sample container, a collecting device, a liquid inlet pipe and a liquid outlet pipe. The dissolving barrel is formed into a cylindrical shape by a cylinder wall and a cylinder bottom. The thickness of the dissolving tank forms a slope from thin to thick along the radial direction of the dissolution barrel. The liquid outlet pipe is connected to the opening. The collecting device is located below the liquid outlet pipe. One end of the "L" shaped liquid inlet pipe is connected to the liquid outlet pipe. The other end of the tank is open as the liquid inlet, and valves are installed on the liquid inlet pipe and the liquid outlet pipe, and the sample holder is in the shape of a shallow dish and is located at the bottom of the dissolution barrel.

The dissolving barrel of the asphalt regenerant diffusion test device of the present invention is used to hold the sample container and the trichlorethylene solution, and its bottom has a slight slope to facilitate the discharge of all the trichlorethylene inside, preventing asphalt from remaining in the bottom of the dissolving barrel and thus affecting the test. The results make an impact. The central opening at the bottom of the dissolution barrel is connected to the liquid inlet pipe and the liquid outlet pipe, and the sample holder is shallow dish-shaped, which is used to hold the asphalt sample. There are switches on the liquid inlet pipe and the liquid outlet pipe to control the entry and exit of trichlorethylene. The top of the inlet tube is connected to a standard (acidic) burette. In order to prevent the asphalt sample from being washed unevenly by trichlorethylene, the liquid inlet pipe is set at the bottom of the dissolution tank, and the solution collection device is placed at the bottom of the liquid outlet pipe.

The method that the present invention applies asphalt regenerant diffusion test device to carry out testing is realized by the following steps:

1. Heat the asphalt and pour it into a sample dish, then put it in an oven and bake until the asphalt is leveled to obtain a sample dish filled with asphalt;

2. Add regenerant or regenerated mist seal material to the sample container filled with asphalt, so that the regenerant or regenerated fog seal material is evenly covered on the surface of the asphalt, and the test asphalt sample is obtained;

Three, the test asphalt sample that step 2 obtains is carried out standstill processing T _diff hour, obtains the sample dish that fills the asphalt sample;

4. Weigh the sample dish containing the asphalt sample, record it as G ₀ , and measure the height of the upper surface of the asphalt sample from the upper edge of the sample dish as H ₀ , then put it into the dissolution bucket, and close the outlet Open the valve on the liquid inlet pipe, add trichlorethylene into the liquid inlet pipe, make the trichlorethylene submerge the upper surface of the asphalt sample, record the volume of trichlorethylene as Vml, close the inlet after standing Open the valve on the liquid pipe, open the valve on the liquid pipe, collect the effluent, take out the sample holder from the dissolution bucket, weigh it after drying, record it as G ₁ , at this time, the distance between the upper surface of the asphalt sample and the The height of the upper edge is H ₁ , and an asphalt cleaning is completed;

5. Repeat the asphalt cleaning process of step 4 for several times. After each asphalt cleaning, take the weight of the sample dish filled with asphalt sample as G _k . is G _k-1 , the height of the upper surface of the asphalt sample from the upper edge of the sample dish after each asphalt washing is _Hk , and the height of the upper surface of the asphalt sample from the upper edge of the sample dish after the previous asphalt washing is H _k-1 , so that the mass of asphalt washed out for the kth time is m _k = G _k-1 -G _k , the unit is g, and the thickness of the bitumen washed out for the kth time is h _k = H _k - H _k-1 , the unit is mm. At the same time, the trichlorethylene is completely volatilized under normal temperature conditions for the discharged liquid collected for the kth time, and then a four-component test is carried out for the solid phase, that is, the saturation percentage of the solid phase discharged for the kth time is tested respectively. content S _k , aromatic percentage content P _k , gum percentage content R _k , asphaltene percentage content A _k ;

6. Calculate the relative content F _k of the regenerant discharged for the kth time according to the following formula:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}<span\; class="notranslate">\; ;</span>$

7. When the difference between the relative content F m of the regenerated agent discharged for the mth time and the relative content F _{m +} 1 of the regenerated agent discharged for the m+1 time does not exceed 10% for the first time, it means that the regenerated agent has diffused to the m-1 layer, then The diffusion depth H _diff of regenerant is:

${\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ;</span>$

8. Calculate the diffusion rate D of the regenerant according to the following formula, unit: mm/h, the calculation formula is:

$\mathrm{<span\; class="notranslate">\; D.</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; diff</span>}}}{{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; diff</span>}}}<span\; class="notranslate">\; ;</span>$

Where T _diff is the diffusion time, and the asphalt regenerant diffusion test is completed.

The present invention utilizes the characteristic of high solubility of trichlorethylene to asphalt, adopts the method of layered dissolution to gradually dissolve the asphalt sample treated with the regenerant, and then conducts an investigation on the diffusion characteristics of the regenerant according to the composition analysis results of the dissolved solution. analyze. This test method using the asphalt regenerant diffusion test device can more accurately measure the diffusion rate of the regenerant, and can be applied to the research field of the regeneration effect of the regenerant.

Description of drawings

Fig. 1 is a schematic structural view of the asphalt regenerant diffusion test device of the present invention.

detailed description

Specific Embodiment 1: The asphalt regeneration agent diffusion test device in this embodiment includes a dissolving barrel 1, a sample container 2, a collecting device 8, a liquid inlet pipe 3 and a liquid outlet pipe 4, and the dissolving barrel 1 is formed into a cylindrical shape by a cylinder wall and a cylinder bottom , there is an opening 9 in the center of the bottom of the cylinder, the thickness of the bottom of the cylinder is gradually sloped from thin to thick along the radial direction of the dissolving barrel 1, the liquid outlet pipe 4 communicates with the opening 9, and the collecting device 8 is located below the liquid outlet pipe 4, " One end of the L"-shaped liquid inlet pipe 3 is connected with the liquid outlet pipe 4, and the other end of the liquid inlet pipe 3 is opened as a liquid inlet, and a valve 7 is arranged on the liquid inlet pipe 3 and the liquid outlet pipe 4 to accept the sample. The dish 2 is located at the bottom of the dissolving barrel 1 in the shape of a shallow dish.

Embodiment 2: This embodiment differs from Embodiment 1 in that the material of the dissolution barrel 1 , the sample holder 2 , the collecting device 8 , the liquid inlet pipe 3 and the liquid outlet pipe 4 is metal.

Embodiment 3: This embodiment is different from Embodiment 2 in that the metal material is stainless steel or aluminum alloy.

Embodiment 4: This embodiment differs from Embodiments 1 to 3 in that the thickness of the cylinder bottom forms a slope from thin to thick along the radial direction of the dissolution tank, and the slope angle of the slope is 5°-10°.

Embodiment 5: This embodiment is different from Embodiment 1 to Embodiment 4 in that an acid burette is arranged above the liquid inlet of the liquid inlet pipe 3 .

Embodiment 6: This embodiment differs from Embodiments 1 to 5 in that the inner diameter of the liquid inlet pipe 3 is 3-5 mm.

The liquid inlet pipe of this embodiment is not easy to be too thick, so as to prevent the turbulent flow on the surface of the sample caused by the excessively fast flow rate, so that the sample cannot be uniformly dissolved in the trichlorethylene. It should not be too fine, otherwise it will affect the test speed.

Specific implementation mode seven: In this implementation mode, the method of using the asphalt regenerant diffusion test device for testing is realized according to the following steps:

1. Heat the asphalt and pour it into a sample dish, then put it in an oven and bake until the asphalt is leveled to obtain a sample dish filled with asphalt;

2. Add regenerant or regenerated mist seal material to the sample container filled with asphalt, so that the regenerant or regenerated fog seal material is evenly covered on the surface of the asphalt, and the test asphalt sample is obtained;

Three, the test asphalt sample that step 2 obtains is carried out standstill processing T _diff hour, obtains the sample dish that fills the asphalt sample;

4. Weigh the sample dish containing the asphalt sample, record it as G ₀ , and measure the height of the upper surface of the asphalt sample from the upper edge of the sample dish as H ₀ , then put it into the dissolution bucket, and close the outlet Open the valve on the liquid inlet pipe, add trichlorethylene into the liquid inlet pipe, make the trichlorethylene submerge the upper surface of the asphalt sample, record the volume of trichlorethylene as Vml, close the inlet after standing Open the valve on the liquid pipe, open the valve on the liquid pipe, collect the effluent, take out the sample holder from the dissolution bucket, weigh it after drying, record it as G ₁ , at this time, the distance between the upper surface of the asphalt sample and the The height of the upper edge is H ₁ , and an asphalt cleaning is completed;

5. Repeat the asphalt cleaning process of step 4 for several times. After each asphalt cleaning, take the weight of the sample dish filled with asphalt sample as G _k . is G _k-1 , the height of the upper surface of the asphalt sample from the upper edge of the sample dish after each asphalt washing is _Hk , and the height of the upper surface of the asphalt sample from the upper edge of the sample dish after the previous asphalt washing is H _k-1 , so that the mass of asphalt washed out for the kth time is m _k = G _k-1 -G _k , the unit is g, and the thickness of the bitumen washed out for the kth time is h _k = H _k - H _k-1 , the unit is mm. At the same time, the trichlorethylene is completely volatilized under normal temperature conditions for the discharged liquid collected for the kth time, and then a four-component test is carried out for the solid phase, that is, the saturation percentage of the solid phase discharged for the kth time is tested respectively. content S _k , aromatic percentage content P _k , gum percentage content R _k , asphaltene percentage content A _k ;

6. Calculate the relative content F _k of the regenerant discharged for the kth time according to the following formula:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}<span\; class="notranslate">\; ;</span>$

7. When the difference between the relative content F m of the regenerated agent discharged for the mth time and the relative content F _{m +} 1 of the regenerated agent discharged for the m+1 time does not exceed 10% for the first time, it means that the regenerated agent has diffused to the m-1 layer, then The diffusion depth H _diff of regenerant is:

${\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ;</span>$

8. Calculate the diffusion rate D of the regenerant according to the following formula, unit: mm/h, the calculation formula is:

$\mathrm{<span\; class="notranslate">\; D.</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; diff</span>}}}{{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; diff</span>}}}<span\; class="notranslate">\; ;</span>$

Where T _diff is the diffusion time, and the asphalt regenerant diffusion test is completed.

In this embodiment, the asphalt sample 5 is placed on the sample holder 2 , and the upper surface of the asphalt sample 5 is submerged by trichlorethylene 6 . If there is no such m value in step 7, it means that the diffusion rate of the regenerant is too fast, and the test should be carried out again, and the processing time of step 3 should be shortened.

In this embodiment, according to the T0618-1993 four-component test method in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011), the four-component test is performed on the effluent samples obtained in step five. The height from the upper surface of the test asphalt to the upper edge of the sample dish before adding the regenerant is 1-3mm.

Embodiment 8: The difference between this embodiment and Embodiment 7 is that when step 2 adds regenerant to the sample holder filled with asphalt, step 3 is to test the asphalt sample at room temperature for the time T _diff For 45 ~ 96h. Other steps and parameters are the same as those in Embodiment 7.

Specific embodiment nine: the difference between this embodiment and specific embodiment seven is that when the second step is to add the regenerated mist seal layer material to the sample container filled with asphalt, the third step is to test the asphalt sample in an oven at 120 ° C The time for standing T _difff is 2 to 5 hours. Other steps and parameters are the same as those in Embodiment 7.

Embodiment: In this embodiment, the method for testing with an asphalt regenerant diffusion test device is realized in the following steps:

1. Heat the Anda 90# asphalt and pour it into the sample dish, then put it in an oven and bake until the asphalt is leveled, to obtain a sample dish filled with asphalt;

2. Add regenerant to the sample dish filled with asphalt, rotate the sample dish to make the regenerant evenly cover the surface of the asphalt, and obtain the test asphalt sample;

Three, the test asphalt sample that step 2 is obtained is carried out static processing T _diff =48 hours, obtains the sample holder that fills the asphalt sample;

4. Weigh the sample dish containing the asphalt sample, record it as G ₀ =26.32g, and measure the height of the upper surface of the asphalt sample from the upper edge of the sample dish as H ₀ =0.86mm, and then place it in the solution In the bucket, close the valve on the liquid outlet pipe, open the valve on the liquid inlet pipe, add trichlorethylene into the liquid inlet pipe, make trichlorethylene submerge the upper surface of the asphalt sample, record the volume of trichlorethylene as Vml , after standing still, close the valve on the liquid inlet pipe, open the valve on the liquid outlet pipe, collect the discharge liquid, take out the sample holder from the dissolution bucket, weigh it after drying, record it as G ₁ =25.74g, at this time the asphalt The height of the upper surface of the sample from the upper edge of the sample dish is H ₁ , and a bitumen cleaning is completed;

5. Repeat the asphalt cleaning process of step 4 for several times. After each asphalt cleaning, take the weight of the sample dish filled with asphalt sample as G _k . is G _k-1 , the height of the upper surface of the asphalt sample from the upper edge of the sample dish after each asphalt washing is _Hk , and the height of the upper surface of the asphalt sample from the upper edge of the sample dish after the previous asphalt washing is H _k-1 , so that the mass of asphalt washed out for the kth time is m _k = G _k-1 -G _k , the unit is g, and the thickness of the bitumen washed out for the kth time is h _k = H _k - H _k-1 , the unit is mm. At the same time, the trichlorethylene is completely volatilized under normal temperature conditions for the discharged liquid collected for the kth time, and then a four-component test is carried out for the solid phase, that is, the saturation percentage of the solid phase discharged for the kth time is tested respectively. content S _k , aromatic percentage content P _k , gum percentage content R _k , asphaltene percentage content A _k ;

6. Calculate the relative content F _k of the regenerant discharged for the kth time according to the following formula:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}<span\; class="notranslate">\; ;</span>$

7. When the difference between the relative content F m of the regenerated agent discharged for the mth time and the relative content F _{m +} 1 of the regenerated agent discharged for the m+1 time does not exceed 10% for the first time, it means that the regenerated agent has diffused to the m-1 layer, then The diffusion depth H _diff of regenerant is:

${\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ;</span>$

8. Calculate the diffusion rate D of the regenerant according to the following formula, unit: mm/h, the calculation formula is:

$\mathrm{<span\; class="notranslate">\; D.</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}}{{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}}<span\; class="notranslate">\; ;</span>$

Where T _diff is the diffusion time, and the asphalt regenerant diffusion test is completed.

The specific test data of steps five to seven of the present embodiment are shown in Table 1;

Table 1

k h _{k f} 1 0.88 12.5 2 0.74 10 3 0.44 3.13 4 0.35 1.81 5 0.26 1.66 6 0.33 1.96

The difference between the 4th and 5th time is less than 10%, so it is considered to diffuse to the 4th layer, the diffusion depth H _diff = (0.88+0.64+0.44+0.35)mm=2.41mm, D=2.41mm/48h=0.05mm/h .

Claims (9)

1. Asphalt regenerant diffusion test device is characterized in that the asphalt regenerant diffusion test device comprises a dissolution bucket (1), a sample holder (2), a collection device (8), a liquid inlet pipe (3) and a liquid outlet pipe ( 4), the dissolution tank (1) is formed into a cylinder by the cylinder wall and the cylinder bottom, and an opening (9) is arranged at the center of the cylinder bottom, and the thickness of the cylinder bottom forms a slope from thin to thick along the radial direction of the dissolution cylinder (1), The liquid outlet pipe (4) communicates with the opening (9), the collecting device (8) is located below the liquid outlet pipe (4), and one end of the "L" shaped liquid inlet pipe (3) communicates with the liquid outlet pipe (4). The other end of the liquid inlet pipe (3) is open as a liquid inlet, and valves (7) are arranged on the liquid inlet pipe (3) and the liquid outlet pipe (4), and the sample container (2) is located in a shallow dish shape. Dissolves the bottom of the barrel (1). 2. Asphalt regenerant diffusion test device according to claim 1 is characterized in that described dissolving barrel (1), sample holder (2), collecting device (8), liquid inlet pipe (3) and outlet The liquid pipe (4) is made of metal material. 3. The asphalt regenerant diffusion test device according to claim 2, characterized in that said metal material is stainless steel or aluminum alloy. 4. The asphalt rejuvenator diffusion test device according to claim 1, characterized in that the thickness of the cylinder bottom forms a slope from thin to thick along the radial direction of the dissolution tank, and the slope angle of the slope is 5° to 10°. 5. The asphalt regeneration agent diffusion test device according to claim 1, characterized in that an acid burette is arranged above the liquid inlet of the liquid inlet pipe 3. 6. The asphalt regeneration agent diffusion test device according to claim 1, characterized in that the inner diameter of the liquid inlet pipe 3 is 3-5 mm. 7. The method for testing with an asphalt regenerant diffusion test device is characterized in that it is realized in the following steps: 1. Heat the asphalt and pour it into a sample dish, then put it in an oven and bake until the asphalt is leveled to obtain a sample dish filled with asphalt; 2. Add regenerant or regenerated mist seal material to the sample container filled with asphalt, so that the regenerant or regenerated fog seal material is evenly covered on the surface of the asphalt, and the test asphalt sample is obtained; Three, the test asphalt sample that step 2 obtains is carried out standstill processing T _diff hour, obtains the sample dish that fills the asphalt sample; 4. Weigh the sample dish containing the asphalt sample, record it as G ₀ , and measure the height of the upper surface of the asphalt sample from the upper edge of the sample dish as H ₀ , then put it into the dissolution bucket, and close the outlet Open the valve on the liquid inlet pipe, add trichlorethylene into the liquid inlet pipe, make the trichlorethylene submerge the upper surface of the asphalt sample, record the volume of trichlorethylene as Vml, close the inlet after standing Open the valve on the liquid pipe, open the valve on the liquid pipe, collect the effluent, take out the sample holder from the dissolution bucket, weigh it after drying, record it as G ₁ , at this time, the distance between the upper surface of the asphalt sample and the The height of the upper edge is H ₁ , and an asphalt cleaning is completed; 5. Repeat the asphalt cleaning process of step 4 for several times. After each asphalt cleaning, take the weight of the sample dish filled with asphalt sample as G _k . is G _k-1 , the height of the upper surface of the asphalt sample from the upper edge of the sample dish after each asphalt washing is _Hk , and the height of the upper surface of the asphalt sample from the upper edge of the sample dish after the previous asphalt washing is H _k-1 , so that the mass of asphalt washed out for the kth time is m _k = G _k-1 -G _k , the unit is g, and the thickness of the bitumen washed out for the kth time is h _k = H _k - H _k-1 , the unit is mm. At the same time, the trichlorethylene is completely volatilized under normal temperature conditions for the discharged liquid collected for the kth time, and then a four-component test is carried out for the solid phase, that is, the saturation percentage of the solid phase discharged for the kth time is tested respectively. content S _k , aromatic percentage content P _k , gum percentage content R _k , asphaltene percentage content A _k ; 6. Calculate the relative content F _k of the regenerant discharged for the kth time according to the following formula: ${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}{{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; k</span>}}}<span\; class="notranslate">\; ;</span>$ 7. When the difference between the relative content F m of the regenerated agent discharged for the mth time and the relative content F _{m +} 1 of the regenerated agent discharged for the m+1 time does not exceed 10% for the first time, it means that the regenerated agent has diffused to the m-1 layer, then The diffusion depth H _diff of regenerant is: ${\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}<span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{<span\; class="notranslate">\; \&Sigma;</span>}}{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ;</span>$ 8. Calculate the diffusion rate D of the regenerant according to the following formula, unit: mm/h, the calculation formula is: $\mathrm{<span\; class="notranslate">\; D.</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}}{{\mathrm{<span\; class="notranslate">\; T</span>}}_{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; i</span>}\mathrm{<span\; class="notranslate">\; f</span>}\mathrm{<span\; class="notranslate">\; f</span>}}}<span\; class="notranslate">\; ;</span>$ Where T _diff is the diffusion time, and the asphalt regenerant diffusion test is completed. 8. the method for testing according to claim 7, is characterized in that when step 2 adds regenerant to the sample holder filled with asphalt, step 3 is to test asphalt sample in The time for standing T _diff at room temperature is 45-96 hours. 9. the method for testing with asphalt regeneration agent diffusion test device according to claim 7, is characterized in that when step 2 adds regeneration mist seal material to the sample holder filled with asphalt, step 3 is to test asphalt The time for the sample to stand in an oven at 120° C. for T _diff is 2 to 5 hours.