CN108676372A - A kind of high-speed railway water-protected enclosure layer modified pitch and preparation method thereof - Google Patents
A kind of high-speed railway water-protected enclosure layer modified pitch and preparation method thereof Download PDFInfo
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- CN108676372A CN108676372A CN201810449495.4A CN201810449495A CN108676372A CN 108676372 A CN108676372 A CN 108676372A CN 201810449495 A CN201810449495 A CN 201810449495A CN 108676372 A CN108676372 A CN 108676372A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The present invention relates to a kind of high-speed railway bituminous concrete water-protected enclosure layer modified pitch, wherein, in terms of the weight of the modified pitch, the raw material of the modified pitch include the bi tumenf orr oad of 60~80 weight %, the vulcanized rubber powder masterbatch of 5~32 weight %, 1~12 weight % butadiene styrene block copolymerization object and 0.2~3 weight % crosslinking agent；And wherein, the vulcanized rubber powder masterbatch is made of the raw material comprising following components：In terms of the weight of the vulcanized rubber powder masterbatch, the destructing agent of the matrix pitch of 40~80 weight %, the vulcanized rubber powder of 10~50 weight % and 5~15 weight %.The invention further relates to purposes of the combination of the preparation method of above-mentioned modified pitch and butadiene styrene block copolymerization object and vulcanized rubber powder especially vulcanized rubber powder masterbatch in preparing modified pitch especially high-speed railway bituminous concrete water-protected enclosure layer modified pitch.
Description
Technical field
The present invention relates to the bituminous concrete water-protected enclosure layer fields of newly built railway non-fragment orbit, and more particularly to one kind
High-speed railway water-protected enclosure layer modified pitch and preparation method thereof.
Background technology
Water-protected enclosure layer is to ensure that high-speed iron roadbed as the important barrier for preventing rainfall and surface water from entering roadbed ontology
One of the key link of long-time stability, require to reach 60 to 100 years service life in design.It is special equal practical to breathe out neat visitor
The operation of high speed the result shows that, the bituminous concrete water-protected enclosure layer that tunneling boring is laid with because with stronger flexibility, no matter waterproof
The ease for maintenance of effect still during use is superior to fiber concrete water-protected enclosure layer, is the waterproof with broad prospect of application
Closure solutions.
For high-speed railway bituminous concrete water-protected enclosure structure, functional requirement is used according to it, needs system to solve super
It is long during one's term of military service in weatherability, crack resistance and scour resistance, the fatigue resistance in high-frequency vibration working environment, and with nothing
The critical problems such as the Rigidity Matching of tiny fragments of stone, coal, etc. track structure levels.To reach above-mentioned requirements, need from bituminous cements optimization, drip
Green mixture type selecting and mix-design, water-protected enclosure layer structure design, site technique and quality control etc. are directed to
Property comprehensive consideration, and bituminous cements optimization be one of key technology therein.
Ripe modified pitch based on SBS modified pitch, want by the mostly use based on asphalt highway currently on the market
It asks and produces preparation, there is no the bituminous cements for high-speed railway bituminous concrete water-protected enclosure layer Special use requirement.From
It is seen in architectural characteristic and requirement, high-speed railway bituminous concrete water-protected enclosure layer Laminate construction thickness is usually 5~10cm,
Only the 1/4~1/2 of Expressway Pitch Concrete Face-layer, and the design of high-speed railway bituminous concrete water-protected enclosure layer is on active service
The time limit is but not less than 60 years, far more than the requirement of 15 years design lifes of Expressway Pitch Concrete Face-layer.In addition, complete
The vibration working environment residing for high-speed railway bituminous concrete water-protected enclosure layer that section is laid with also is substantially distinguished from highway asphalt
The working environment on road surface.Therefore, it is necessary to which the overlength Years Of Service etc. for high-speed railway bituminous concrete water-protected enclosure layer makes
With require provide high-speed railway bituminous concrete water-protected enclosure layer modified pitch.
Invention content
The purpose of the present invention is the requirements for high-speed railway bituminous concrete water-protected enclosure layer, provide a kind of high speed
Railway bituminous concrete water-protected enclosure layer modified pitch.
The purpose of the present invention is achieved through the following technical solutions.
On the one hand, the present invention provides a kind of high-speed railway bituminous concrete water-protected enclosure layer modified pitch, wherein with
The weight meter of the modified pitch, the raw material of the modified pitch include bi tumenf orr oad, 5~32 weights of 60~80 weight %
Measure the crosslinking agent of the vulcanized rubber powder masterbatch of %, the butadiene styrene block copolymerization object and 0.2~3 weight % of 1~12 weight %；
And wherein, the vulcanized rubber powder masterbatch is made of the raw material comprising following components：In terms of the weight of the vulcanized rubber powder masterbatch,
The destructing agent of the matrix pitch of 40~80 weight %, the vulcanized rubber powder of 10~50 weight % and 5~15 weight %.
According to modified pitch provided by the invention, wherein the vulcanized rubber powder masterbatch is by method comprising the following steps system
At：By the vulcanized rubber powder and the destructing agent mixes and development of degrading, and will degrade product and matrix pitch after developing
Shear-mixed.
According to modified pitch provided by the invention, wherein the temperature of the degradation development is 130 DEG C~150 DEG C, and the time is excellent
It is selected as 3~5 hours.
According to modified pitch provided by the invention, wherein the raw material of the modified pitch includes 8~32 weight %, preferably
For the vulcanized rubber powder masterbatch of 15~32 weight %；
According to modified pitch provided by the invention, wherein the raw material of the modified pitch includes the fourth two of 1~9 weight %
Alkene styrene block copolymer.
According to modified pitch provided by the invention, wherein the vulcanized rubber powder can be by waste tire such as section width
It is prepared through room temperature polishing for 900~1200 inches of truck tyres.The main component of vulcanized rubber powder is usually sulphur
Change natural rubber.In some embodiments, the grain size of the vulcanized rubber powder is 30~100 mesh.
According to modified pitch provided by the invention, wherein the matrix pitch is asphalt.In some embodiments
In, the matrix pitch can be double dragon 70#A grade matrix pitches.
According to modified pitch provided by the invention, wherein the bi tumenf orr oad is to meet JTG F40-2004 standards
A grade bi tumenf orr oads.
According to modified pitch provided by the invention, wherein the destructing agent is selected from furfural extract oil, aromatic naphtha, shale
It is one or more in oil and rubber filling oil.
According to modified pitch provided by the invention, wherein the example of suitable rubber filling oil includes but not limited to paraffin
Hydrocarbon type rubber filling oil, naphthenic type rubber filling oil and aromatic hydrocarbon rubber filling oil, preferably naphthenic type rubber filling oil.
According to modified pitch provided by the invention, wherein the crosslinking agent is selected from SAG-002R, Elvaloy AM and mistake
It aoxidizes one or more in diisopropylbenzene (DIPB).
According to modified pitch provided by the invention, wherein the butadiene styrene block copolymerization object is star-like styrene-
Butadiene-styrene copolymer.
According to modified pitch provided by the invention, wherein the weight average molecular weight of the butadiene styrene block copolymerization object
For 120000~300000g/mol.
On the other hand, the modified drip of above-mentioned high-speed railway bituminous concrete water-protected enclosure layer is prepared the present invention provides a kind of
Green method, wherein the described method comprises the following steps：
(1) by the vulcanized rubber powder and the destructing agent mixes and development of degrading, degradation development product is obtained；
(2) by the degradation obtained in step (1) development product and matrix pitch shear-mixed, vulcanized rubber powder masterbatch is obtained；
(3) by the vulcanized rubber powder masterbatch obtained in step (2), the butadiene styrene block copolymerization object and the road
Asphalt is blended, and butadiene styrene block copolymerization object is swollen at 160~190 DEG C；With
(4) crosslinking agent, stirring development, to obtain high-speed railway pitch are added in the product into step (3) after swelling
Concrete water-proof confining bed modified pitch.
According to method provided by the invention, wherein temperature of degradation development described in the step (1) at 130 DEG C~150 DEG C
Degree is lower to carry out, and the time for development of degrading is preferably 3~5 hours.
According to method provided by the invention, wherein degradation development described in the step (1) is usually in development tank pump in advance
It carries out.
According to method provided by the invention, wherein shear-mixed described in the step (2) usually in a kettle into
Row.In some embodiments, degradation development product in pre- development tank object can be delivered in reaction kettle by screw pump, and
And shear-mixed is carried out by colloid mill.
According to method provided by the invention, wherein the time being swollen described in the step (3) is 2~3 hours.
According to method provided by the invention, wherein the temperature that development is stirred described in the step (4) is 20~50 DEG C,
Time is preferably 60~150 minutes.
Another aspect, the present invention also provides the combinations of butadiene styrene block copolymerization object and above-mentioned vulcanized rubber powder masterbatch
Purposes in preparing modified pitch especially high-speed railway bituminous concrete water-protected enclosure layer modified pitch.
The present invention has the advantage that：
(1) present inventor has found unexpectedly, by using butadiene styrene block copolymerization object (SBS) and sulphur
Change rubber powder masterbatch combination to bi tumenf orr oad carry out composite modified obtained modified pitch with good low-temperature cracking-resistance,
Ageing-resistant performance, long-time stability and flexible adjustment ability, while also reducing the cost of modified pitch are ideal height
Fast railway bituminous concrete water-protected enclosure layer bituminous cements.
(2) the method for the present invention carries out degradation development to vulcanized rubber powder, realizes the liquefaction activation of vulcanized rubber powder, masterbatch is made
It is mixed afterwards with bi tumenf orr oad together with SBS, then swelling, development, it is steady in pitch to solve rubber grain and SBS
It is qualitative and dispersed.In addition, it is undesirable to be restricted by theory, it is believed that there are certain conjunctions for SBS and rubber grain in modified pitch
Aurification, to improve the performance of modified pitch.
Specific implementation mode
The present invention is further described in detail With reference to embodiment, the embodiment provided is only for explaining
The bright present invention, the range being not intended to be limiting of the invention.
Embodiment 1
(1) furfural extract oil of the vulcanized rubber powder of 900 inches of tires of 50 mass parts, 30 mesh and 10 mass parts is being sent out in advance
It educates in tank and is uniformly mixed, degradation development 5 hours at 140 ± 5 DEG C.
(2) it is pumped into double dragon 70#A grade matrix pitches of 40 mass parts into reaction kettle, tank object will be developed by screw pump in advance
In material be delivered to reaction kettle, by the homogeneous colloid mill of model SYJZM02-30/0.2 types carry out shearing be blended 2 hours, obtain
To vulcanized rubber powder masterbatch.
(3) by the star-shaped sbs (weight average molecular weight 120000g/mol) of the vulcanized rubber powder masterbatch of 8 mass parts and 9 mass parts
It is blended with the A of 80 mass parts grade bi tumenf orr oads by colloid mill, is kept for 3 hours at a temperature of 160 DEG C, SBS completes swelling.
(4) material obtained in step (3) is transferred in finished pot, the cumyl peroxide that 3 mass parts are added is made
For crosslinking agent, stirring at normal temperature is developed 60 minutes in finished pot, that is, high-speed railway bituminous concrete water-protected enclosure layer is prepared
With modified pitch, number 1.
Embodiment 2
(1) aromatic naphtha of the vulcanized rubber powder of 1000 inches of tires of 10 mass parts, 100 mesh and 10 mass parts is being developed in advance
It is uniformly mixed in tank, degradation development 3 hours at 140 ± 5 DEG C.
(2) double dragon 70#A grade matrix pitches of 80 mass parts are added into reaction kettle, tank object will be developed by screw pump in advance
In material be delivered to reaction kettle, by the homogeneous colloid mill of model SYJZM02-30/0.2 types carry out shearing be blended 2 hours, obtain
To vulcanized rubber powder masterbatch.
(3) by star-shaped sbs (the weight average molecular weight 300000g/ of the vulcanized rubber powder masterbatch of 32 mass parts and 1 mass parts
Mol it) is blended, is kept for 2 hours at a temperature of 190 DEG C, SBS with the A of 66.8 mass parts grade bi tumenf orr oads by colloid mill
Complete swelling.
(4) material obtained in step (3) is transferred in finished pot, the SAG-002R of 0.2 mass parts is added as friendship
Join agent, stirring at normal temperature is developed 60 minutes in finished pot, that is, high-speed railway bituminous concrete water-protected enclosure layer is prepared with changing
Property pitch, number 2.
Embodiment 3
(1) by the vulcanized rubber powder of 1100 inches of tires of 25 mass parts, 80 mesh and the shale oil of 5 mass parts in development tank in advance
In be uniformly mixed, at 140 ± 5 DEG C degradation development 3 hours.
(2) double dragon 70#A grade matrix pitches of 70 mass parts are added into reaction kettle, will be developed in tank in advance by screw pump
Material be delivered to reaction kettle, by the colloid mill of the homogeneous of model SYJZM02-30/0.2 types carry out shearing be blended 1 hour,
Obtain vulcanized rubber powder masterbatch.
(3) by star-shaped sbs (the weight average molecular weight 300000g/ of the vulcanized rubber powder masterbatch of 15 mass parts and 5 mass parts
Mol it) is blended, is kept for 2 hours at a temperature of 190 DEG C, SBS with the A of 78.5 mass parts grade bi tumenf orr oads by colloid mill
Complete swelling.
(4) material obtained in step (3) is transferred in finished pot, the Elvaloy AM conducts of 1.5 mass parts is added
Crosslinking agent, stirring at normal temperature is developed 60 minutes in finished pot, that is, high-speed railway bituminous concrete water-protected enclosure layer use is prepared
Modified pitch, number 3.
Embodiment 4
(1) rubber filling oil of the vulcanized rubber powder of 1200 inches of tires of 40 mass parts, 80 mesh and 15 mass parts is being sent out in advance
It educates in tank and is uniformly mixed, degradation development 3 hours at 140 ± 5 DEG C.
(2) double dragon 70#A grade matrix pitches of 45 mass parts are added into reaction kettle, will be developed in tank in advance by screw pump
Material be delivered to reaction kettle, by the colloid mill of the homogeneous of model SYJZM02-30/0.2 types carry out shearing be blended 1 hour,
Obtain vulcanized rubber powder masterbatch.
(3) by star-shaped sbs (the weight average molecular weight 300000g/ of the vulcanized rubber powder masterbatch of 30 mass parts and 8 mass parts
Mol it) is blended, is kept for 2 hours at a temperature of 190 DEG C, SBS is complete with the A of 60 mass parts grade bi tumenf orr oads by colloid mill
At swelling.
(4) material obtained in step (3) is transferred in finished pot, the SAG-002R of 2 mass parts is added as crosslinking
Agent, stirring at normal temperature is developed 60 minutes in finished pot, that is, the modification of high-speed railway bituminous concrete water-protected enclosure layer is prepared
Pitch, number 4.
Comparative example 1
(1) A that the star-shaped sbs (weight average molecular weight 300000g/mol) of 9 mass parts are passed through into colloid mill and 88 mass parts
Grade bi tumenf orr oad is blended, and is kept for 2 hours at a temperature of 160 DEG C, and SBS completes swelling.
(2) material obtained in step (1) is transferred in finished pot, the cumyl peroxide that 3 mass parts are added is made
For crosslinking agent, high-speed railway bituminous concrete water-protected enclosure layer is prepared with changing in stirring at normal temperature 60 minutes in finished pot
Property pitch, number 5.
Comparative example 2
(1) furfural extract oil of the vulcanized rubber powder of 900 inches of tires of 50 mass parts, 30 mesh and 10 mass parts is being sent out in advance
It educates in tank and is uniformly mixed, degradation development 5 hours at 140 ± 5 DEG C.
(2) it is pumped into double dragon 70#A grade matrix pitches of 40 mass parts into reaction kettle, will be developed in tank in advance by screw pump
Material be delivered to reaction kettle, by the colloid mill of the homogeneous of model SYJZM02-30/0.2 types carry out shearing be blended 2 hours,
Obtain vulcanized rubber powder masterbatch.
(3) the vulcanized rubber powder masterbatch of 9 mass parts and the A grade bi tumenf orr oads of 88 mass parts are blended.
(4) material obtained in step (3) is transferred in finished pot, the cumyl peroxide that 3 mass parts are added is made
For crosslinking agent, stirring at normal temperature is developed 60 minutes in finished pot, that is, high-speed railway bituminous concrete water-protected enclosure layer is prepared
With modified pitch, number 6.
Performance test
According to《Highway engineering pitch and Asphalt Mixture Experiment regulation》JTG E20-2011, to embodiment 1-4 and comparison
Modified pitch prepared by example 1-2 is tested, and the results are shown in Table 1.
Table 1
The modified pitch of the present invention has better low temperature it can be seen from ductility data after 5 DEG C of ductilities in table 1 and aging
Crack resistance；Modified pitch of the invention it can be seen from ductility has higher resistance to old after viscosity data and aging at 60 DEG C
Change performance and flexible adjustment ability；And the modified pitch of the present invention is with higher it can be seen from isolation softening point difference data
Stability.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of high-speed railway bituminous concrete water-protected enclosure layer modified pitch, wherein in terms of the weight of the modified pitch,
The raw material of the modified pitch includes the bi tumenf orr oad of 60~80 weight %, the vulcanized rubber powder masterbatch of 5~32 weight %, 1
The crosslinking agent of the butadiene styrene block copolymerization object of~12 weight % and 0.2~3 weight %；And wherein, the vulcanizate
Powder masterbatch is made of the raw material comprising following components：In terms of the weight of the vulcanized rubber powder masterbatch, the matrix of 40~80 weight %
The destructing agent of pitch, the vulcanized rubber powder of 10~50 weight % and 5~15 weight %.
2. modified pitch according to claim 1, wherein the vulcanized rubber powder masterbatch is by method comprising the following steps system
At：By the vulcanized rubber powder and the destructing agent mixes and development of degrading, and will degrade product and matrix pitch after developing
Shear-mixed；
Preferably, the temperature of the degradation development is 130 DEG C~150 DEG C；
It is further preferred that the time of the degradation development is preferably 3~5 hours.
3. modified pitch according to claim 1 or 2, wherein the raw material of the modified pitch includes 8~32 weight %,
The preferably vulcanized rubber powder masterbatch of 15~32 weight %；
Preferably, the raw material of the modified pitch includes the butadiene styrene block copolymerization object of 1~9 weight %.
4. modified pitch according to any one of claim 1 to 3, wherein the grain size of the vulcanized rubber powder is 30~100
Mesh；
Preferably, the matrix pitch is asphalt；
Preferably, the destructing agent is one kind or more in furfural extract oil, aromatic naphtha, shale oil and rubber filling oil
Kind；
It is highly preferred that the rubber filling oil is paraffin hydrocarbon type rubber filling oil, naphthenic type rubber filling oil or aromatic hydrocarbons type rubber
Glue filling oil.
5. modified pitch according to any one of claim 1 to 4, wherein the crosslinking agent be selected from SAG-002R,
It is one or more in Elvaloy AM and cumyl peroxide.
6. modified pitch according to any one of claim 1 to 5, wherein the butadiene styrene block copolymerization object
For star-like styrene-butadiene-styrene；
Preferably, the weight average molecular weight of the butadiene styrene block copolymerization object is 120000~300000g/mol.
7. a kind of preparing the modified drip of high-speed railway bituminous concrete water-protected enclosure layer according to any one of claims 1 to 6
Green method, wherein the described method comprises the following steps：
(1) by the vulcanized rubber powder and the destructing agent mixes and development of degrading, degradation development product is obtained；
(2) by the degradation obtained in step (1) development product and matrix pitch shear-mixed, vulcanized rubber powder masterbatch is obtained；
(3) by the vulcanized rubber powder masterbatch obtained in step (2), the butadiene styrene block copolymerization object and the road oil
Pitch is blended, and butadiene styrene block copolymerization object is swollen at 160~190 DEG C；With
(4) crosslinking agent, stirring development, to obtain high-speed railway pitch coagulation are added in the product into step (3) after swelling
Native water-protected enclosure layer modified pitch.
8. according to the method described in claim 7, wherein, degradation development described in the step (1) is at 130 DEG C~150 DEG C
At a temperature of carry out；
Preferably, degrade described in the step (1) development time be 3~5 hours；
Preferably, the time being swollen described in the step (3) is 2~3 hours.
9. method according to claim 7 or 8, wherein the temperature for stirring development described in the step (4) is 20~50
℃；
Preferably, the time that development is stirred described in the step (4) is 60~150 minutes.
10. the group of butadiene styrene block copolymerization object and the vulcanized rubber powder masterbatch defined in any one of claims 1 to 4
Close the purposes in preparing modified pitch especially high-speed railway bituminous concrete water-protected enclosure layer modified pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810449495.4A CN108676372B (en) | 2018-05-11 | 2018-05-11 | Modified asphalt for waterproof sealing layer of high-speed railway and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810449495.4A CN108676372B (en) | 2018-05-11 | 2018-05-11 | Modified asphalt for waterproof sealing layer of high-speed railway and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108676372A true CN108676372A (en) | 2018-10-19 |
| CN108676372B CN108676372B (en) | 2020-11-24 |
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| CN201810449495.4A Active CN108676372B (en) | 2018-05-11 | 2018-05-11 | Modified asphalt for waterproof sealing layer of high-speed railway and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304865A (en) * | 2019-03-20 | 2019-10-08 | 上海应用技术大学 | Old cement concrete overlays repair materials and application method |
| CN114351579A (en) * | 2021-12-24 | 2022-04-15 | 东南大学 | Long-life cement concrete bridge multi-medium waterproof composite layer |
| CN116463060A (en) * | 2023-03-21 | 2023-07-21 | 东南大学 | Composite modified asphalt for odor-removal weather-resistant high-speed railway asphalt concrete waterproof sealing layer and preparation method thereof |
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| JPS5343722A (en) * | 1976-10-01 | 1978-04-20 | Asahi Chemical Ind | Master batch composition for gum denatured asphalt |
| CN1528823A (en) * | 2003-09-26 | 2004-09-15 | 沈阳三鑫公路工程有限公司 | Method for preparing waste rubber-powder modified asphalt |
| CN101644028A (en) * | 2009-07-16 | 2010-02-10 | 北京立高科技有限公司 | High polymer modified bituminous waterproof sheet material for highways and railways and preparation technology thereof |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5343722A (en) * | 1976-10-01 | 1978-04-20 | Asahi Chemical Ind | Master batch composition for gum denatured asphalt |
| CN1528823A (en) * | 2003-09-26 | 2004-09-15 | 沈阳三鑫公路工程有限公司 | Method for preparing waste rubber-powder modified asphalt |
| CN101644028A (en) * | 2009-07-16 | 2010-02-10 | 北京立高科技有限公司 | High polymer modified bituminous waterproof sheet material for highways and railways and preparation technology thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304865A (en) * | 2019-03-20 | 2019-10-08 | 上海应用技术大学 | Old cement concrete overlays repair materials and application method |
| CN114351579A (en) * | 2021-12-24 | 2022-04-15 | 东南大学 | Long-life cement concrete bridge multi-medium waterproof composite layer |
| CN114351579B (en) * | 2021-12-24 | 2024-05-17 | 东南大学 | Long-life cement concrete bridge multi-medium waterproof composite layer |
| CN116463060A (en) * | 2023-03-21 | 2023-07-21 | 东南大学 | Composite modified asphalt for odor-removal weather-resistant high-speed railway asphalt concrete waterproof sealing layer and preparation method thereof |
| CN116463060B (en) * | 2023-03-21 | 2024-03-12 | 东南大学 | Composite modified asphalt for odor-removal weather-resistant high-speed railway asphalt concrete waterproof sealing layer and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN108676372B (en) | 2020-11-24 |
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