CN102795801A - Asphalt warm mix additive for high grade road and preparation method thereof - Google Patents
Asphalt warm mix additive for high grade road and preparation method thereof Download PDFInfo
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- CN102795801A CN102795801A CN2012103028635A CN201210302863A CN102795801A CN 102795801 A CN102795801 A CN 102795801A CN 2012103028635 A CN2012103028635 A CN 2012103028635A CN 201210302863 A CN201210302863 A CN 201210302863A CN 102795801 A CN102795801 A CN 102795801A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The present invention belongs to the field of road paving materials, provides an asphalt warm mix additive for high grade roads and a preparation method thereof. The asphalt warm mix additive comprises, by weight, 1-10 parts of a Gemini-type surfactant, 50-90 parts of a diluent, 0.1-5 parts of an anti-stripping agent, and 1-3 parts of a stabilizer. A warm mix asphalt mixture can be prepared by the asphalt warm mix additive. An asphalt pavement paved by the warm mix asphalt mixture is flexible in construction, convenient, and environmental-friendly. With a premise of not affecting pavement performance of the asphalt mixture, the construction temperature can be reduced by 40-50 DEG C, so the energy source is saved. The warm mix asphalt mixture is safe and practical, and easy for rolling, and helps to protect health of construction workers. The design, mixing and construction process of the warm mix asphalt mixture are basically consistent with those of a hot-mix mixture. The asphalt warm mix additive helps to reduce the mixing temperature, reduce the aging degree during mixing of asphalt, and extend the service life of roads, is in line with the green sustainable development road, and has a strong promotion and application value.
Description
Technical field
The invention belongs to the road pavement field of materials, relate in particular to a kind of asphalt warm-mix agent that is used for advanced road and preparation method thereof.
Background technology
In road project, the production of asphalt and application are the rich anies influential family of energy consumption and environmental pollution.The German Research data show that 1 ton of hot-mix asphalt mixture of every production need consume 8 liters of oil fuel.The test data of China shows that hot-mix asphalt mixture gives off the carbonic acid gas (CO of 2.6mg/g in production and paving process
2), the carbon monoxide (CO) of 104mg/g, the oxynitride (NOx) of 151mg/g and the waste gas such as flue dust of 5.6mg/g.Using the negative impact of hot-mix asphalt mixture is that the waste of environment damage, the energy and people's the rights to subsistence are dwindled, and this and China develop green sustainability road and runs in the opposite direction with the too fast development of energy-saving and emission-reduction inhibition high energy consumption that " 12 " planning proposes.Therefore, very be necessary that the novel Warm-Mix Bitumen Mixture of developing a kind of " environmental protection is economical " replaces hot-mix asphalt mixture.
In today of paying attention to environmental protection day by day, Warm-Mix Bitumen Mixture will become one of following asphalt technological development direction with the advantage more than it.External research and application through the more than ten years have become comparatively sophisticated experience and technology to design, production and the construction of Warm-Mix Bitumen Mixture, and China's this technology that then just begins one's study in recent years still is in the stage at the early-stage.
Summary of the invention
The invention provides a kind of asphalt warm-mix agent that is used for advanced road and preparation method thereof; Be intended to solve at present in road project; The production of asphalt and application have caused the energy to consume excessively and severe environmental pollution; And the design of Warm-Mix Bitumen Mixture, production and construction still are in the problem of starting stage in also prematurity of China.
The object of the present invention is to provide a kind of asphalt warm-mix agent that is used for advanced road, the weight percent of this asphalt warm-mix agent consists of: 1～10 part in Gemini class tensio-active agent, 50～90 parts of thinners, 0.1～5 part of antistripping agent, 1～3 part of stablizer.
Further, said Gemini class tensio-active agent is one or more compounds of cationic, non-ionic type and amphoteric Gemini class tensio-active agent.
Further, said cationic Gemini surfactants is the dialkyl quaternary ammonium salt [C with flexible group
nH
2n+1-N
+(CH
3)
2-CH
2CH
2(OCH
2CH
2)
m-N
+(CH
3)
2-C
nH
2n+1] 2Br
-With CH with the group that is rigidly connected
4-[CH
2N
+(CH
3)
2(CH
2)
nCH
3]
22Br
-, wherein n is 12,14,16,18 and 20.
Further, said non-ionic type Gemini tensio-active agent is alcohol ether and phenolic ether type, and connected clique comprises Resorcinol
C
10H
21CH [CH
2O (CH
2CH
2O)
nH]-O-CH
4-O-CHC
10H
21[CH
2O (CH
2CH
2O)
n] H and dithioglycol
CH (C
10H
21) [CH
2O (C
2H
4O)
nH]-S-CH
2-CH
2-S-HC (C
10H
21) [CH
2O (C
2H
4O)
nH], wherein n is 14,16 and 20.
Further, said amphoteric ionic Gemini surfactant is imidazoline type CH
2CH
2NCR (CH
2)
2SO
3 -N
+-CH
2-CH
2-CH
2CH
2NCR (CH
2)
2SO
3 -N
+With SULPHOSUCCINIC ACID ESTER betaine type C
nH
2n+1-PO (O
-)-O-CH
2CH
2-N
+(CH
3)
2-C
nH
2n+1, wherein n is 12,14,16,18 and 20.
Further, said thinner be water and alcoholic acid one or more, antistripping agent is disodium EDTA or tetra-na salt, stablizer is magnesium chloride or calcium chloride.
Further, said stablizer is magnesium chloride or calcium chloride.
Another object of the present invention is to provide a kind of preparation method who is used for the asphalt warm-mix agent of advanced road, this method may further comprise the steps:
Step 1 joins 1～10 part Gemini class tensio-active agent 40～50 ℃ the time by the weight percent of asphalt warm-mix agent in 50～90 parts the thinner and mixes;
Step 2 adds 0.1～5 part antistripping agent on the basis of step 1;
Step 4 is processed asphalt warm-mix agent after mixing.
Another object of the present invention is to provide a kind of preparation method of Warm-Mix Bitumen Mixture, this method may further comprise the steps:
Pitch and mineral aggregate are heated to certain temperature respectively;
In the mix pot, add 95% mineral aggregate, 5% pitch and account for the warm-mixing agent of pitch weight 1～5%, mix 60 seconds prepares Warm-Mix Bitumen Mixture.
Further, can confirm the best mold temperature of the Warm-Mix Bitumen Mixture of the different warm-mixing agents of admixture through Marshall Test;
The mold temperature of Warm-Mix Bitumen Mixture is not less than 100 ℃, and when the mold temperature of Warm-Mix Bitumen Mixture during greater than 100 ℃, voidage can meet design requirement.
Asphalt warm-mix agent that is used for advanced road provided by the invention and preparation method thereof; The weight percent of asphalt warm-mix agent consists of: 1～10 part in Gemini class tensio-active agent, 50～90 parts of thinners, 0.1～5 part of antistripping agent, 1～3 part of stablizer; Can prepare Warm-Mix Bitumen Mixture through adopting this asphalt warm-mix agent; Pitch and mineral aggregate are heated to certain temperature respectively; In the mix pot, add 95% mineral aggregate, 5% pitch and account for the warm-mixing agent of pitch weight 1～5%, mix 60 seconds prepares Warm-Mix Bitumen Mixture; The asphalt pavement construction of this Warm-Mix Bitumen Mixture system of spreading is flexible, convenient, environmental protection, under the prerequisite that does not influence the asphalt pavement performance, can reduce by 40～50 ℃ of construction temperatures, has practiced thrift the energy; Safe, practical, be easy to roll, protected effectively that the workmen's is healthy; The design of Warm-Mix Bitumen Mixture, mix and stir and construction technology and hot-laid mixture basically identical; Reduced and mixed and stirred temperature; Alleviated the degree of aging when pitch mixes and stirs; Prolong the working life of road, met the road of energy-saving and emission-reduction and green Sustainable development, had stronger popularization and using value.
Description of drawings
Fig. 1 is the preparing method's of the asphalt warm-mix agent that is used for advanced road that provides of the embodiment of the invention realization flow figure;
Fig. 2 is the preparing method's of the Warm-Mix Bitumen Mixture that provides of the embodiment of the invention realization flow figure;
Fig. 3 is the porosity of the Warm-Mix Bitumen Mixture that provides of the embodiment of the invention and the relation curve synoptic diagram of mold temperature.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further specified below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in the qualification invention.
The object of the present invention is to provide a kind of asphalt warm-mix agent that is used for advanced road, the weight percent of this asphalt warm-mix agent consists of: 1～10 part in Gemini class tensio-active agent, 50～90 parts of thinners, 0.1～5 part of antistripping agent, 1～3 part of stablizer.
In embodiments of the present invention, Gemini class tensio-active agent is one or more compounds of cationic, non-ionic type and amphoteric Gemini class tensio-active agent.
In embodiments of the present invention, cationic Gemini surfactants is the dialkyl quaternary ammonium salt [C with flexible group
nH
2n+1-N
+(CH
3)
2-CH
2CH
2(OCH
2CH
2)
m-N
+(CH
3)
2-C
nH
2n+1] 2Br
-With CH with the group that is rigidly connected
4-[CH
2N
+(CH
3)
2(CH
2)
nCH
3]
22Br
-, wherein n is 12,14,16,18 and 20.
In embodiments of the present invention, non-ionic type Gemini tensio-active agent is alcohol ether and phenolic ether type, and connected clique comprises Resorcinol
C
10H
21CH [CH
2O (CH
2CH
2O)
nH]-O-CH
4-O-CHC
10H
21[CH
2O (CH
2CH
2O)
n] H and dithioglycol
CH (C
10H
21) [CH
2O (C
2H
4O)
nH]-S-CH
2-CH
2-S-HC (C
10H
21) [CH
2O (C
2H
4O)
nH], wherein n is 14,16 and 20.
In embodiments of the present invention, amphoteric ionic Gemini surfactant is imidazoline type CH
2CH
2NCR (CH
2)
2SO
3 -N
+-CH
2-CH
2-CH
2CH
2NCR (CH
2)
2SO
3 -N
+With SULPHOSUCCINIC ACID ESTER betaine type C
nH
2n+1-PO (O
-)-O-CH
2CH
2-N
+(CH
3)
2-C
nH
2n+1, wherein n is 12,14,16,18 and 20.
In embodiments of the present invention, thinner be water and alcoholic acid one or more, antistripping agent is disodium EDTA or tetra-na salt, stablizer is magnesium chloride or calcium chloride.
In embodiments of the present invention, stablizer is magnesium chloride or calcium chloride.
As shown in Figure 1, another object of the present invention is to provide a kind of preparation method who is used for the asphalt warm-mix agent of advanced road, this method may further comprise the steps:
In step S101, by the weight percent of asphalt warm-mix agent 1～10 part Gemini class tensio-active agent is joined 40～50 ℃ the time in 50～90 parts the thinner and mix;
In step S102, on the basis of step 1, add 0.1～5 part antistripping agent;
In step S103, on the basis of step 2, add 1～3 part stablizer;
In step S104, process asphalt warm-mix agent after mixing.
As shown in Figure 2, another object of the present invention is to provide a kind of preparation method of Warm-Mix Bitumen Mixture, this method may further comprise the steps:
In step S201, pitch and mineral aggregate are heated to certain temperature respectively;
In step S201, in the mix pot, add 95% mineral aggregate, 5% pitch and account for the warm-mixing agent of pitch weight 1～5%, mix 60 seconds prepares Warm-Mix Bitumen Mixture.
In embodiments of the present invention, can confirm the best mold temperature of the Warm-Mix Bitumen Mixture of the different warm-mixing agents of admixture through Marshall Test;
The mold temperature of Warm-Mix Bitumen Mixture is not less than 100 ℃, and when the mold temperature of Warm-Mix Bitumen Mixture during greater than 100 ℃, voidage can meet design requirement.
Below in conjunction with accompanying drawing and specific embodiment application principle of the present invention is further described.
For overcoming the problem that the road bitumen construction exists; The present invention provides a kind of asphalt warm-mix agent; The acting in conjunction in the process of mixing and stirring of warm-mixing agent and heated bitumen; Warm-mixing agent is dispersed into the formed micelle of oxygen nitrogen sulfur compound that contains in the pitch effect of small molecules micella, realizes homodisperse by the process of mixing and stirring, reaches viscosity reduction and the temperature that reduces the mix temperature.Warm-mixing agent is enriched in residual minim water and bituminous interface in addition, and is temporary at the structural moisture film of the inner formation of agglutinate.Because the moisture film effect is temperature influence not, when temperature descended, the moisture film lubrication can largely be offset the effect that asphalt viscosity increases, thereby the realization temperature is mixed.After compacting was accomplished, warm-mixing agent can have certain antistripping effect to building stones and pitch interfacial migration, the reinforcement adhesive property with bituminous cements that gathers materials.
The weight percent of asphalt warm-mix agent consists of: 1～3 part in 1～10 part in Gemini class tensio-active agent, 50～90 parts of thinners, antistripping agent 0.1～5, stablizer;
Gemini class tensio-active agent is one or more compounds of cationic, non-ionic type and amphoteric Gemini class tensio-active agent.
Cationic Gemini surfactants is the dialkyl quaternary ammonium salt [C with flexible group
nH
2n+1-N
+(CH
3)
2-CH
2CH
2(OCH
2CH
2)
m-N
+(CH
3)
2-C
nH
2n+1] 2Br
-With CH with the group that is rigidly connected
4-[CH
2N
+(CH
3)
2(CH
2)
nCH
3]
22Br
-, wherein n is 12,14,16,18 and 20.
Non-ionic type Gemini tensio-active agent is alcohol ether and phenolic ether type, and connected clique comprises the C of Resorcinol
10H
21CH [CH
2O (CH
2CH
2O)
nH]-O-CH
4-O-CHC
10H
21[CH
2O (CH
2CH
2O)
n] H and dithioglycol
CH (C
10H
21) [CH
2O (C
2H
4O)
nH]-S-CH
2-CH
2-S-HC (C
10H
21) [CH
2O (C
2H
4O)
nH], wherein n is 14,16 and 20.
Amphoteric ionic Gemini surfactant is imidazoline type CH
2CH
2NCR (CH
2)
2SO
3 -N
+-CH
2-CH
2-CH
2CH
2NCR (CH
2)
2SO
3 -N
+With SULPHOSUCCINIC ACID ESTER betaine type C
nH
2n+1-PO (O
-)-O-CH
2CH
2-N
+(CH
3)
2-C
nH
2n+1, wherein n is 12,14,16,18 and 20.
Thinner be water and alcoholic acid one or more, antistripping agent is disodium EDTA or tetra-na salt, stablizer is magnesium chloride or calcium chloride.
The preparation of asphalt warm-mix agent
1. by the weight percent of asphalt warm-mix agent Gemini class tensio-active agent is joined in the solvent 40～50 ℃ the time and mix;
2. on the basis of step 1, add antistripping agent;
3. on the basis of step 2, add stablizer;
4. process asphalt warm-mix agent after mixing.
The asphalt preparation
1. pitch and mineral aggregate are heated to certain temperature respectively;
2. in the mix pot, add mineral aggregate (95%), pitch (5%) and warm-mixing agent (account for pitch weight 1～5%), mix 60 seconds prepares asphalt.
Above-mentioned warm-mixing agent compared with prior art has following characteristics:
1. flexible, convenient, the environmental protection of asphalt pavement construction;
2. under the prerequisite that does not influence the asphalt pavement performance, can reduce by 40～50 ℃ of construction temperatures, thus save energy;
3. safe, practical, be easy to roll, the protection workmen's is healthy;
4. the design of Warm-Mix Bitumen Mixture, mix and stir and construction technology and hot-laid mixture basically identical;
5. reduce and mix and stir temperature, the degree of aging when alleviating pitch and mixing and stirring;
6. prolong the construction period.
Through Marshall Test, confirm the mixing of the different warm-mixing agents of admixture and expect best mold temperature.The asphalt mold temperature is respectively: 80 ℃, 90 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃.Draw test specimen voidage and mold temperature graph of a relation according to detected result, as shown in Figure 3.
As can be seen from Figure 1; The compacting temperature of Warm-Mix Bitumen Mixture is starkly lower than hot-mix asphalt mixture; The compacting workability of Warm-Mix Bitumen Mixture reduces (even forming insensitive scope) greatly to the susceptibility of temperature, and the compacting temperature scope that can reach the target compaction degree obviously enlarges.Mold temperature is during greater than 100 ℃, and voidage can meet design requirement.
The test specimen detected result of asphalt when 90 ℃, 100 ℃, 110 ℃ moulding seen table 1.
Table 1 marshal piece test result
From table 1, can find out; The corresponding asphalt of asphalt warm-mix agent is when 100 ℃ and 110 ℃ of moulding; Each item volume index of marshal piece and mechanical index satisfy " asphalt highway construction technique normalizing " (JTG F40-2004) requirement, and the asphalt mold temperature is not less than 100 ℃.
Warm-mixing agent carries out pavement performance tests such as high low temperature, freeze thawing splitting to compound, test-results is seen table 2.Wherein, the asphalt mold temperature is 105 ℃.
Table 2 asphalt pavement performance test-results
| Interventions Requested | Hot-laid mixture | Temperature is mixed compound | Technical requirements |
| The wheel tracking test dynamic stability (inferior/mm) | 1855 | 1880 | ≥1000 |
| Low-temperature bending breaking strain (μ ε) | 2478 | 2326 | ≥2300 |
| -10 ℃ of freeze thawing split test retained strengths are than (%) | 86.3 | 88.7 | ≥80 |
Can know that by test-results in the table 2 Warm-Mix Bitumen Mixture compares with hot-mix asphalt mixture, high temperature, low temperature and anti-water damage property are more or less the same, and all satisfy " asphalt highway construction technique normalizing " (JTG F40-2004) requirement.
The embodiment of the invention provides is used for asphalt warm-mix agent of advanced road and preparation method thereof; The weight percent of asphalt warm-mix agent consists of: 1～10 part in Gemini class tensio-active agent, 50～90 parts of thinners, 0.1～5 part of antistripping agent, 1～3 part of stablizer; Can prepare Warm-Mix Bitumen Mixture through adopting this asphalt warm-mix agent; Pitch and mineral aggregate are heated to certain temperature respectively; In the mix pot, add 95% mineral aggregate, 5% pitch and account for the warm-mixing agent of pitch weight 1～5%, mix 60 seconds prepares Warm-Mix Bitumen Mixture; The asphalt pavement construction of this Warm-Mix Bitumen Mixture system of spreading is flexible, convenient, environmental protection, under the prerequisite that does not influence the asphalt pavement performance, can reduce by 40～50 ℃ of construction temperatures, has practiced thrift the energy; Safe, practical, be easy to roll, protected effectively that the workmen's is healthy; The design of Warm-Mix Bitumen Mixture, mix and stir and construction technology and hot-laid mixture basically identical; Reduced and mixed and stirred temperature; Alleviated the degree of aging when pitch mixes and stirs; Prolong the working life of road, met the road of energy-saving and emission-reduction and green Sustainable development, had stronger popularization and using value.
More than be merely preferred embodiment of the present invention,, all any modifications of within spirit of the present invention and principle, being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention not in order to restriction the present invention.
Claims (10)
1. an asphalt warm-mix agent that is used for advanced road is characterized in that, the weight percent of this asphalt warm-mix agent consists of: 1～10 part in Gemini class tensio-active agent, 50～90 parts of thinners, 0.1～5 part of antistripping agent, 1～3 part of stablizer.
2. asphalt warm-mix agent as claimed in claim 1 is characterized in that, said Gemini class tensio-active agent is one or more compounds of cationic, non-ionic type and amphoteric Gemini class tensio-active agent.
3. asphalt warm-mix agent as claimed in claim 2 is characterized in that, said cationic Gemini surfactants is the dialkyl quaternary ammonium salt with flexible group
[C
nH
2n+1-N
+(CH
3)
2-CH
2CH
2(OCH
2CH
2)
m-N
+(CH
3)
2-C
nH
2n+1] 2Br
-With CH with the group that is rigidly connected
4-[CH
2N
+(CH
3)
2(CH
2)
nCH
3]
22Br
-, wherein n is 12,14,16,18 and 20.
4. asphalt warm-mix agent as claimed in claim 2 is characterized in that, said non-ionic type Gemini tensio-active agent is alcohol ether and phenolic ether type, and connected clique comprises Resorcinol
C
10H
21CH [CH
2O (CH
2CH
2O)
nH]-O-CH
4-O-CHC
10H
21[CH
2O (CH
2CH
2O)
n] H and dithioglycol
CH (C
10H
21) [CH
2O (C
2H
4O)
nH]-S-CH
2-CH
2-S-HC (C
10H
21) [CH
2O (C
2H
4O)
nH], wherein n is 14,16 and 20.
5. asphalt warm-mix agent as claimed in claim 2 is characterized in that, said amphoteric ionic Gemini surfactant is imidazoline type CH
2CH
2NCR (CH
2)
2SO
3 -N
+-CH
2-CH
2-CH
2CH
2NCR (CH
2)
2SO
3 -N
+With SULPHOSUCCINIC ACID ESTER betaine type C
nH
2n+1-PO (O
-)-O-CH
2CH
2-N
+(CH
3)
2-C
nH
2n+1, wherein n is 12,14,16,18 and 20.
6. asphalt warm-mix agent as claimed in claim 1 is characterized in that, said thinner be water and alcoholic acid one or more, antistripping agent is disodium EDTA or tetra-na salt, stablizer is magnesium chloride or calcium chloride.
7. asphalt warm-mix agent as claimed in claim 1 is characterized in that, said stablizer is magnesium chloride or calcium chloride.
8. a preparation method who is used for the asphalt warm-mix agent of advanced road is characterized in that, this method may further comprise the steps:
Step 1 joins 1～10 part Gemini class tensio-active agent 40～50 ℃ the time by the weight percent of asphalt warm-mix agent in 50～90 parts the thinner and mixes;
Step 2 adds 0.1～5 part antistripping agent on the basis of step 1;
Step 3 adds 1～3 part stablizer on the basis of step 2;
Step 4 is processed asphalt warm-mix agent after mixing.
9. the preparation method of a Warm-Mix Bitumen Mixture is characterized in that, this method may further comprise the steps:
Pitch and mineral aggregate are heated to certain temperature respectively;
In the mix pot, add 95% mineral aggregate, 5% pitch and account for the warm-mixing agent of pitch weight 1～5%, mix 60 seconds prepares Warm-Mix Bitumen Mixture.
10. preparation method as claimed in claim 9 is characterized in that, can confirm the best mold temperature of the Warm-Mix Bitumen Mixture of the different warm-mixing agents of admixture through Marshall Test;
The mold temperature of Warm-Mix Bitumen Mixture is not less than 100 ℃, and when the mold temperature of Warm-Mix Bitumen Mixture during greater than 100 ℃, voidage can meet design requirement.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104559246A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Zwitter-ion asphalt warm-mixing agent and preparation method thereof |
| CN105585274A (en) * | 2014-10-22 | 2016-05-18 | 中国石油化工股份有限公司 | Warm-mixing asphalt mixture anti-rutting modifier and preparation method thereof |
| CN105623283A (en) * | 2014-11-03 | 2016-06-01 | 中国石油化工股份有限公司 | Anionic liquid-crystal-form asphalt warm-mixing agent and preparation method therefor |
| CN106823986A (en) * | 2017-01-20 | 2017-06-13 | 广东顺德工业设计研究院(广东顺德创新设计研究院) | Three-stage fluorine surfactant and its preparation method and application |
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| CN101899218A (en) * | 2010-07-22 | 2010-12-01 | 天津市市政工程研究院 | Asphalt warm-mix agent and asphalt mixture mixed by same as well as preparation methods thereof |
| CN102285774A (en) * | 2011-06-10 | 2011-12-21 | 中交第一公路勘察设计研究院有限公司 | Asphalt pavement warm mixing regenerator and preparation method and using method thereof |
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Application publication date: 20121128 |