CN105300845B - Bitumen regenerant diffusion test device and method of testing - Google Patents
Bitumen regenerant diffusion test device and method of testing Download PDFInfo
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Abstract
Bitumen regenerant diffusion test device and method of testing, the present invention relates to bitumen regenerant diffusion evaluate experimental rig and its application process, it in order to solve at present not yet have bitumen regenerant spread related experiment device and evaluation method not enough efficiently accurately problem.The experimental rig includes dissolving bucket, holds sample ware, collection device, feed tube and drain pipe.Method of testing is first to carry out stewing process to the bitumen samples for adding regenerative agent, bitumen samples are weighed and measured with the height of sample, add trichloro ethylene and carry out pitch cleaning, then repeated washing process is multiple, measure four components of discharge liquor solid formation, regenerative agent relative amount is calculated, then regenerative agent diffusion rate is obtained by diffusion depth.Present invention utilizes the trichloro ethylene characteristic big to the dissolubility of pitch, the bitumen samples handled by regenerative agent are progressively dissolved using the method for layering dissolving, then the diffusion property of regenerative agent analyzed according to the composition analysis result of solution after dissolving.
Description
Technical field
The present invention relates to the experimental rig and its application process that bitumen regenerant diffusion is evaluated.
Background technology
The Large scale construction of highway in China will trace back to eighties of last century the mid-80, by the construction in more than 30 years, arrive
2015, highway in China total kilometrage reached more than 450 ten thousand kilometers, and wherein highway reaches 10.8 ten thousand kilometers, wherein 80% is drip
Blue or green concrete road surface.Till now, there are a considerable amount of bituminous pavings to reach service life, be faced with extensive maintenance dimension
Repair or even rebuild.In addition, continuing to develop with China Transportation Industry, the volume of traffic and vehicular load increase rapidly make it is newly-built
Highway has just had been subjected to a certain degree of damage in a short time, needs the necessary maintenance work of progress badly to extend making for road
Use the life-span.In general, China's road life is not generally long, builds and completes to be accomplished by carrying out regular maintenance in the near future.But at present
Highway in China build nutrient from general layout still have, and be still difficult to solve, how by the theory of life cycle management through highway
Construction, maintenance and operation in, have become one urgent problem to be solved of highway industry.
For newly-built bituminous paving, in the presence of temperature and oxygen, asphalt material is in pressure of mixing and stirring, transport and pave
A certain degree of short ageing can occur during reality, although this process duration is very short, the generation to asphalt performance
Huge destruction, has research to think that the needle penetration after short ageing is only the 60%-75% of original value.And the newly-built drip after being compacted
Blue or green road surface, surface void is not blocked also, therefore with certain permeability.Before being open to traffic, large quantity of air and water penetration are arrived
Newly-built bituminous paving, can also accelerate the aging of new pavement.
For old asphalt pavement, in the influence of the extraneous factors such as ultraviolet radiation, high-temperature oxydation, water erosion, traffic wear
Under, pitch is persistently aging, and then triggers the pavement diseases such as fatigue cracking, pit.This long-term ageing process can continue to weaken
The performance of bituminous paving.
Bitumen regenerant mainly use petroleum refining material, its application purpose be mainly regulation and improve asphalt material due to
The component that the newly-built short ageing of road or old road long-term ageing are caused is unbalance, the design performance of fast quick-recovery bituminous paving.
So as to repair the asphalt pavement material of aging, improve road surface outward appearance and performance, delay bituminous paving ager process, prolonged with reaching
Long service life of road surface, reduces the purpose of maintenance cost.
Because current regenerative agent product is by actual verification for many years, the ability of its " softening " aged asphalt will not be deposited substantially
In problem, however, can regenerative agent diffusion but have emphatically into pitch to the recovery situation of bituminous pavement property well
The influence wanted, it may be said that regenerative agent regeneration effect is heavily dependent on the height of diffusion degree.As regenerative agent is spilt
The change of the factors such as cloth amount, time of penetration, asphalt mixture porosity, fracture spacing so that its penetration depth is differed.
The road surface of China is mostly closely knit fluid-tight, and after the rolling repeatedly of vehicle surface become more closely knit, under ooze
Effect is relatively weak.Thus regeneration mist sealing can play preferable palingenesis in a long time, main still by again
The diffusion of raw agent.Therefore generally believe that can regenerative agent (including regeneration agent material for cold and hot regeneration) in the world at present
Playing the influence depth of " regeneration " effect and regenerative agent well has important relation, therefore the research of regenerative agent diffusion problem is
It is highly desirable to, and is significantly.
But not yet there is the experimental provision and means of correlation to analyze regenerative agent diffusion process and rule at present, it is basic herein
It is upper to need to develop a set of experimental rig and its application method for diffusion test for correlative study.
The content of the invention
The invention aims to the related experiment device for solving not yet to have bitumen regenerant to spread at present and evaluation side
Not efficiently accurate enough the problem of method, and bitumen regenerant diffusion test device and method of testing are provided.
Bitumen regenerant diffusion test device of the present invention includes dissolving cylinder, holds sample ware, collection device, feed tube and go out liquid
Pipe, dissolving cylinder forms tubular by barrel and cylinder bottom, is provided with opening at the center at cylinder bottom, the thickness edge at cylinder bottom dissolve the radial direction of cylinder by
Be as thin as it is thick form the gradient, drain pipe is communicated with opening, and collection device is located at the lower section of drain pipe, one end of " L " shape feed tube and
Drain pipe is connected, and the other end opening of feed tube is provided with valve on feed tube and drain pipe, holds sample as inlet
Ware is located at the bottom of dissolving cylinder in shallow disc shape.
The dissolving cylinder of bitumen regenerant diffusion test device of the present invention is used to hold to hold sample ware and trichloro ethylene solution, its bottom
Portion slightly has the gradient, to facilitate the trichloro ethylene of inside all to discharge, prevents pitch from residuing in dissolving cylinder bottom to tie experiment
Fruit impacts.The bottom center opening of cylinder, connection feed tube and drain pipe are dissolved, sample ware is held for shallow disc shape, for holding drip
Blue or green sample.There is switch on feed tube and drain pipe, for controlling trichloro ethylene to pass in and out.Standard (acidity) drop is connect at the top of feed tube
Fixed tube.In order to prevent asphalt sample from being washed away by the uneven of trichloro ethylene, feed tube is arranged on the bottom of dissolving cylinder, drain pipe
Place solution collection device in bottom.
The method that present invention application bitumen regenerant diffusion test device is tested is realized according to the following steps：
First, pour into and held in sample ware after pitch is heated, be then placed in baking oven and be dried to pitch levelling, obtain filling pitch
Hold sample ware；
2nd, to fill pitch hold in sample ware add regenerative agent or regeneration mist sealing material, make regenerative agent or regeneration mist envelope
Layer material is uniformly covered with the surface of pitch, obtains testing bitumen samples；
3rd, the test bitumen samples for obtaining step 2 carry out stewing process TdiffHour, obtain filling bitumen samples
Hold sample ware；
4th, the sample ware that holds for filling bitumen samples is weighed, is designated as G0, and the upper surfaces of bitumen samples is measured away from holding on sample ware
The height at edge is H0, it is then placed into dissolving cylinder, the valve closed on drain pipe opens the valve on feed tube, Xiang Jin
Trichloro ethylene is added in liquid pipe, trichloro ethylene was flooded the upper surface of bitumen samples, the volume of record trichloro ethylene is V ml,
The valve closed after standing on feed tube, opens the valve on drain pipe, collects discharge liquor, is taken out from dissolving cylinder and holds sample ware,
Weighed after drying, be designated as G1, now the upper surface of bitumen samples away from hold sample ware top edge height be H1, complete a pitch clear
Wash；
5th, the pitch cleaning process of repeat step four repeatedly, weighed after the cleaning of each pitch fill bitumen samples hold sample
The weight of ware is Gk, the weight for holding sample ware that bitumen samples are filled after preceding pitch cleaning is Gk-1, dripped after each pitch cleaning
The upper surface of blue or green sample away from hold sample ware top edge height be Hk, the upper surface of bitumen samples is away from holding sample after the cleaning of a preceding pitch
The height of ware top edge is Hk-1, so that obtaining kth time washes out the quality of pitch for mk=Gk-1-Gk, unit is g, and kth time is washed
The thickness of the pitch gone out is hk=Hk-Hk-1, unit is mm, while making three chloroethenes under the discharge liquor normal temperature condition collected to kth time
Alkene volatilizees completely, four component tests is then carried out to solid formation, i.e., the solid formation saturation point percentage of test kth time discharge contains respectively
Measure Sk, fragrance point percentage composition Pk, colloid percentage composition Rk, asphalitine percentage composition Ak；
6th, the regenerative agent relative amount F of kth time discharge is calculated as followsk：
7th, as the regenerative agent relative amount F for occurring the m times discharge firstmWith the regenerative agent relative amount of the m+1 times discharge
Fm+1Difference then reflects that regenerative agent diffuses to m-1 layers when being no more than 10%, then regenerative agent diffusion depth HdiffFor：
8th, regenerative agent diffusion rate D, unit are calculated as follows：Mm/h, calculation formula is：
Wherein TdiffFor diffusion time, the diffusion test test of completion bitumen regenerant.
, will be by again using the method for layering dissolving present invention utilizes the trichloro ethylene characteristic big to the dissolubility of pitch
The bitumen samples of raw agent processing progressively dissolve, then according to diffusion property of the composition analysis result of solution after dissolving to regenerative agent
Analyzed.This method tested using bitumen regenerant diffusion test device can accurately determine regenerative agent
Diffusion rate, can be applied to the research field of regenerative agent regeneration effect.
Brief description of the drawings
Fig. 1 is the structural representation of bitumen regenerant diffusion test device of the present invention.
Embodiment
Embodiment one：Present embodiment bitumen regenerant diffusion test device includes dissolving cylinder 1, holds sample ware 2, receipts
Acquisition means 8, feed tube 3 and drain pipe 4, dissolving cylinder 1 form tubular by barrel and cylinder bottom, and opening 9, cylinder are provided with the center at cylinder bottom
Radial direction of the thickness at bottom along dissolving cylinder 1 forms the gradient by being as thin as thickness, and drain pipe 4 is communicated with opening 9, and collection device 8 is located at liquid
The lower section of pipe 4, one end of " L " shape feed tube 3 is connected with drain pipe 4, and the other end of feed tube 3 is open as inlet,
Valve 7 is provided with feed tube 3 and drain pipe 4, the bottom that sample ware 2 is located at dissolving cylinder 1 in shallow disc shape is held.
Embodiment two：Present embodiment and dissolving cylinder 1 described unlike embodiment one, hold sample ware
2nd, the material of collection device 8, feed tube 3 and drain pipe 4 is metal material.
Embodiment three：Present embodiment is stainless from metal material described unlike embodiment two
Steel or aluminium alloy.
Embodiment four：The thickness edge at cylinder bottom unlike one of present embodiment and embodiment one to three
The radial direction for dissolving cylinder forms the gradient by being as thin as thickness, and the slope angle of the gradient is 5 °~10 °.
Embodiment five：In feed tube 3 unlike one of present embodiment and embodiment one to four
Acid burette is provided with above inlet.
Embodiment six：Unlike one of present embodiment and embodiment one to five in feed tube 3
Footpath is 3~5mm.
The feed tube of present embodiment should not be excessively thick, prevents too fast flow velocity from causing the turbulent flow of sample surfaces, so that sample
Trichloro ethylene can not be uniformly dissolved in.Also it is unsuitable meticulous, otherwise influence test speed.
Embodiment seven：The method that present embodiment application bitumen regenerant diffusion test device is tested by with
Lower step is realized：
First, pour into and held in sample ware after pitch is heated, be then placed in baking oven and be dried to pitch levelling, obtain filling pitch
Hold sample ware；
2nd, to fill pitch hold in sample ware add regenerative agent or regeneration mist sealing material, make regenerative agent or regeneration mist envelope
Layer material is uniformly covered with the surface of pitch, obtains testing bitumen samples；
3rd, the test bitumen samples for obtaining step 2 carry out stewing process TdiffHour, obtain filling bitumen samples
Hold sample ware；
4th, the sample ware that holds for filling bitumen samples is weighed, is designated as G0, and the upper surfaces of bitumen samples is measured away from holding on sample ware
The height at edge is H0, it is then placed into dissolving cylinder, the valve closed on drain pipe opens the valve on feed tube, Xiang Jin
Trichloro ethylene is added in liquid pipe, trichloro ethylene was flooded the upper surface of bitumen samples, the volume of record trichloro ethylene is V ml,
The valve closed after standing on feed tube, opens the valve on drain pipe, collects discharge liquor, is taken out from dissolving cylinder and holds sample ware,
Weighed after drying, be designated as G1, now the upper surface of bitumen samples away from hold sample ware top edge height be H1, complete a pitch clear
Wash；
5th, the pitch cleaning process of repeat step four repeatedly, weighed after the cleaning of each pitch fill bitumen samples hold sample
The weight of ware is Gk, the weight for holding sample ware that bitumen samples are filled after preceding pitch cleaning is Gk-1, dripped after each pitch cleaning
The upper surface of blue or green sample away from hold sample ware top edge height be Hk, the upper surface of bitumen samples is away from holding sample after the cleaning of a preceding pitch
The height of ware top edge is Hk-1, so that obtaining kth time washes out the quality of pitch for mk=Gk-1-Gk, unit is g, and kth time is washed
The thickness of the pitch gone out is hk=Hk-Hk-1, unit is mm, while making three chloroethenes under the discharge liquor normal temperature condition collected to kth time
Alkene volatilizees completely, four component tests is then carried out to solid formation, i.e., the solid formation saturation point percentage of test kth time discharge contains respectively
Measure Sk, fragrance point percentage composition Pk, colloid percentage composition Rk, asphalitine percentage composition Ak；
6th, the regenerative agent relative amount F of kth time discharge is calculated as followsk：
7th, as the regenerative agent relative amount F for occurring the m times discharge firstmWith the regenerative agent relative amount of the m+1 times discharge
Fm+1Difference then reflects that regenerative agent diffuses to m-1 layers when being no more than 10%, then regenerative agent diffusion depth HdiffFor：
8th, regenerative agent diffusion rate D, unit are calculated as follows：Mm/h, calculation formula is：
Wherein TdiffFor diffusion time, the diffusion test test of completion bitumen regenerant.
Bitumen samples 5 are placed in by present embodiment holds sample ware 2, and trichloro ethylene 6 flooded the upper surface of bitumen samples 5.Step
If rapid seven are not present such m values, illustrate that regenerative agent diffusion rate is too fast, test should be re-started, and shorten step 3
Processing time.
Present embodiment according to《Highway engineering pitch and Asphalt Mixture Experiment code》In (JTG E20-2011)
The discharge liquor sample that the constituent test methods of T0618-1993 tetra- are obtained to step 5 carries out four constituent tests respectively.Add regeneration
Before agent test pitch upper surface away from hold sample ware top edge height be 1~3mm.
Embodiment eight：Present embodiment from unlike embodiment seven when step 2 is to filling pitch
When holding addition regenerative agent in sample ware, step 3 is that test bitumen samples are stood into T at room temperaturediffTime be 45~96h.Its
Its step and parameter are identical with embodiment seven.
Embodiment nine：Present embodiment from unlike embodiment seven when step 2 is to filling pitch
When holding addition regeneration mist sealing material in sample ware, step 3 is that test bitumen samples are stood into T in 120 DEG C of baking ovendifff's
Time is 2~5 hours.Other steps and parameter are identical with embodiment seven.
Embodiment：The method that the present embodiment application bitumen regenerant diffusion test device is tested is real according to the following steps
It is existing：
First, pour into and held in sample ware after Anda 90# pitches are heated, be then placed in baking oven and be dried to pitch levelling, contained
Have pitch holds sample ware；
2nd, regenerative agent is added in sample ware to filling holding for pitch, sample ware is held in rotation makes regenerative agent uniformly be covered with pitch
Surface, obtains testing bitumen samples；
3rd, the test bitumen samples for obtaining step 2 carry out stewing process Tdiff=48 hours, obtain filling pitch examination
Sample holds sample ware；
4th, the sample ware that holds for filling bitumen samples is weighed, is designated as G0=26.32g, and measure the upper surfaces of bitumen samples away from
The height for holding sample ware top edge is H0=0.86mm, is then placed into dissolving cylinder, and the valve closed on drain pipe opens feed liquor
Valve on pipe, trichloro ethylene is added into feed tube, trichloro ethylene was flooded the upper surface of bitumen samples, records three chloroethenes
The volume of alkene is V ml, the valve closed on feed tube after standing, opens the valve on drain pipe, discharge liquor is collected, from dissolving
Taken out in cylinder and hold sample ware, weighed after drying, be designated as G1=25.74g, now the upper surface of bitumen samples is away from holding sample ware top edge
Highly it is H1, complete a pitch cleaning；
5th, the pitch cleaning process of repeat step four repeatedly, weighed after the cleaning of each pitch fill bitumen samples hold sample
The weight of ware is Gk, the weight for holding sample ware that bitumen samples are filled after preceding pitch cleaning is Gk-1, dripped after each pitch cleaning
The upper surface of blue or green sample away from hold sample ware top edge height be Hk, the upper surface of bitumen samples is away from holding sample after the cleaning of a preceding pitch
The height of ware top edge is Hk-1, so that obtaining kth time washes out the quality of pitch for mk=Gk-1-Gk, unit is g, and kth time is washed
The thickness of the pitch gone out is hk=Hk-Hk-1, unit is mm, while making three chloroethenes under the discharge liquor normal temperature condition collected to kth time
Alkene volatilizees completely, four component tests is then carried out to solid formation, i.e., the solid formation saturation point percentage of test kth time discharge contains respectively
Measure Sk, fragrance point percentage composition Pk, colloid percentage composition Rk, asphalitine percentage composition Ak；
6th, the regenerative agent relative amount F of kth time discharge is calculated as followsk：
7th, as the regenerative agent relative amount F for occurring the m times discharge firstmWith the regenerative agent relative amount of the m+1 times discharge
Fm+1Difference then reflects that regenerative agent diffuses to m-1 layers when being no more than 10%, then regenerative agent diffusion depth HdiffFor：
8th, regenerative agent diffusion rate D, unit are calculated as follows：Mm/h, calculation formula is：
Wherein TdiffFor diffusion time, the diffusion test test of completion bitumen regenerant.
The specific test data of the present embodiment step 5 to seven is shown in Table 1；
Table 1
| k | hk | Fk |
| 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 4th and the 5th difference are less than 10%, it is taken as that being diffused into the 4th layer, diffusion depth Hdiff=(0.88+0.64
+ 0.44+0.35) mm=2.41mm, D=2.41mm/48h=0.05mm/h.
Claims (9)
1. bitumen regenerant diffusion test device, it is characterised in that the bitumen regenerant diffusion test device include dissolving cylinder (1),
Sample ware (2), collection device (8), feed tube (3) and drain pipe (4) are held, dissolving cylinder (1) forms tubular by barrel and cylinder bottom, in cylinder
The center at bottom is provided with opening (9), and the thickness at cylinder bottom radially forms slope along Tong Di centers to the edge for dissolving cylinder (1) by being as thin as thickness
Degree, drain pipe (4) is communicated with opening (9), and collection device (8) is located at the lower section of drain pipe (4), one end of " L " shape feed tube (3)
It is connected with drain pipe (4), the other end opening of feed tube (3) is as inlet, on feed tube (3) and drain pipe (4)
Valve (7) is provided with, the bottom that sample ware (2) is located at dissolving cylinder (1) in shallow disc shape is held.
2. bitumen regenerant diffusion test device according to claim 1, it is characterised in that be described dissolving cylinder (1),
The material for holding sample ware (2), collection device (8), feed tube (3) and drain pipe (4) is metal material.
3. bitumen regenerant diffusion test device according to claim 2, it is characterised in that described metal material is not
Become rusty steel or aluminium alloy.
4. bitumen regenerant diffusion test device according to claim 1, it is characterised in that the thickness edge dissolving cylinder at cylinder bottom
(1) Tong Di centers to edge radially forms the gradient by being as thin as thickness, and the slope angle of the gradient is 5 °~10 °.
5. bitumen regenerant diffusion test device according to claim 1, it is characterised in that on the inlet of feed tube 3
Side is provided with acid burette.
6. bitumen regenerant diffusion test device according to claim 1, it is characterised in that the internal diameter of feed tube 3 is 3~
5mm。
7. the method tested using bitumen regenerant diffusion test device as claimed in claim 1, it is characterised in that be
Follow these steps to realize：
First, pour into and held in sample ware after pitch is heated, be then placed in baking oven and be dried to pitch levelling, obtain filling pitch holds sample
Ware；
2nd, to fill pitch hold in sample ware add regenerative agent or regeneration mist sealing material, make regenerative agent or regeneration mist sealing material
Material is uniformly covered with the surface of pitch, obtains testing bitumen samples；
3rd, the test bitumen samples for obtaining step 2 carry out stewing process TdiffHour, obtain filling bitumen samples holds sample
Ware；
4th, the sample ware that holds for filling bitumen samples is weighed, is designated as G0, and the upper surfaces of bitumen samples is measured away from holding sample ware top edge
Height be H0, it is then placed into dissolving cylinder, the valve closed on drain pipe opens the valve on feed tube, to feed tube
Middle addition trichloro ethylene, makes trichloro ethylene flood the upper surface of bitumen samples, the volume of record trichloro ethylene is V ml, is stood
The valve closed afterwards on feed tube, opens the valve on drain pipe, collects discharge liquor, is taken out from dissolving cylinder and holds sample ware, dried
After weigh, be designated as G1, now the upper surface of bitumen samples away from hold sample ware top edge height be H1, complete a pitch cleaning；
5th, the pitch cleaning process of repeat step four repeatedly, weigh after the cleaning of each pitch fill bitumen samples hold sample ware
Weight is Gk, the weight for holding sample ware that bitumen samples are filled after preceding pitch cleaning is Gk-1, pitch is tried after each pitch cleaning
The upper surface of sample away from hold sample ware top edge height be Hk, the upper surface of bitumen samples is away from holding on sample ware after the cleaning of a preceding pitch
The height at edge is Hk-1, so that obtaining kth time washes out the quality of pitch for mk=Gk-1-Gk, unit is g, what kth time was washed out
The thickness of pitch is hk=Hk-Hk-1, unit is mm, while making trichloro ethylene complete under the discharge liquor normal temperature condition collected to kth time
Full volatilization, then carries out four component tests to solid formation, i.e., test the solid formation saturation point percentage composition of kth time discharge respectively
Sk, fragrance point percentage composition Pk, colloid percentage composition Rk, asphalitine percentage composition Ak；
6th, the regenerative agent relative amount F of kth time discharge is calculated as followsk：
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<mo>;</mo>
</mrow>
1
7th, as the regenerative agent relative amount F for occurring the m times discharge firstmWith the regenerative agent relative amount F of the m+1 times dischargem+1Phase
Difference then reflects that regenerative agent diffuses to m-1 layers when being no more than 10%, then regenerative agent diffusion depth HdiffFor：
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8th, regenerative agent diffusion rate D, unit are calculated as follows：Mm/h, calculation formula is：
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Wherein TdiffFor diffusion time, the diffusion test test of completion bitumen regenerant.
8. the method for test according to claim 7, it is characterised in that when step 2 adds to holding in sample ware for pitch is filled
When entering regenerative agent, step 3 is that test bitumen samples are stood into T at room temperaturediffTime be 45~96h.
9. the method for test according to claim 7, it is characterised in that when step 2 adds to holding in sample ware for pitch is filled
When entering to regenerate mist sealing material, step 3 is that test bitumen samples are stood into T in 120 DEG C of baking ovendiffTime be 2~5
Hour.
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| CN105716999B (en) * | 2016-04-14 | 2018-04-03 | 河海大学 | A kind of reclaimed asphalt mixture regenerative agent diffuser efficiency evaluation method |
| CN108195721B (en) * | 2017-12-07 | 2020-12-29 | 同济大学 | Method for testing diffusion coefficients among different asphalts |
| CN108333083A (en) * | 2018-03-06 | 2018-07-27 | 长安大学 | A kind of assessment method of emulsification pitch penetration oil penetration depth |
| CN108956433B (en) * | 2018-05-25 | 2021-03-09 | 中交第二公路勘察设计研究院有限公司 | Calculation method of ultraviolet aging vertical diffusion depth of asphalt mixture |
| CN109115672B (en) * | 2018-11-06 | 2021-01-01 | 苏交科集团股份有限公司 | Method for evaluating permeability of asphalt pavement regeneration seal material |
| CN111024556B (en) * | 2019-12-13 | 2020-09-15 | 四川省公路规划勘察设计研究院有限公司 | Device and method for evaluating diffusion capacity of regenerant in aged asphalt |
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