CN108559289B - Nano modified emulsified asphalt and preparation and use methods thereof - Google Patents
Nano modified emulsified asphalt and preparation and use methods thereof Download PDFInfo
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- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention relates to asphalt and a preparation method and a use method thereof, in particular to nano modified emulsified asphalt and a preparation method and a use method thereof, wherein the nano modified emulsified asphalt comprises the following raw materials: graphene, waste engine oil, desulfurized rubber powder, matrix asphalt, a rubber and plastic stabilizer, SBR cationic styrene-butadiene latex, an emulsifier and water. The preparation method of the nano modified emulsified asphalt comprises the following steps: step 1: dehydrating and removing heavy metals from the waste engine oil; step 2: shearing into soft rubber-plastic modified asphalt; and step 3: obtaining a mixed solution; and 4, step 4: and simultaneously adding the soft rubber-plastic modified asphalt and the mixed solution into a colloid mill for shearing and mixing to obtain the nano modified emulsified asphalt. The application method of the nano modified emulsified asphalt comprises the following steps: step 1: weighing nano modified emulsified asphalt for later use; step 2: preparing a mixture A; and step 3: preparing a mixture B; and 4, step 4: and adding the nano modified emulsified asphalt into the mixture B, and stirring to prepare a regenerated asphalt mixture.
Description
Technical Field
The invention relates to asphalt and a preparation method and a use method thereof, in particular to nano modified emulsified asphalt and a preparation method and a use method thereof.
Background
At present, the regeneration technology of asphalt pavements at home and abroad is divided into four categories, namely hot plant mixing regeneration, hot site regeneration, cold plant mixing regeneration and cold site regeneration. At present, the most applied technology is a plant mixing hot recycling technology, the technology is relatively mature and stable in quality, but the energy consumption is too large, new asphalt, new aggregate and waste RAP need to be heated to a very high temperature in the mixing process, so that the environmental pollution is caused, and the benefit maximization cannot be achieved, so that the cold recycling technology (emulsified asphalt cold recycling and foamed asphalt cold recycling) has certain advantages, the recycling of the waste RAP can be realized, the normal-temperature construction can be achieved, and the environmental pollution cannot be caused while the service performance of the recycled asphalt pavement is ensured; in particular to the cold regeneration technology of the emulsified asphalt, which is widely applied to the maintenance of asphalt pavements in China.
The cold regeneration technology of emulsified asphalt is a technology for recycling waste RAP by crushing and screening the recovered waste RAP by adopting special equipment, and mixing, paving and rolling the waste RAP with a certain proportion of new aggregate, a regeneration stabilizer, active filler, emulsified asphalt, water and the like at normal temperature to form a pavement structure layer. The advantages are mainly shown in the following aspects: the construction at normal temperature can be realized, the asphalt does not need to be heated, the fuel can be saved, and the secondary aging of the waste asphalt mixture can be avoided; secondly, the cold recycling construction of the emulsified asphalt is convenient, and the traditional asphalt mixture construction equipment is adopted; emulsified asphalt is non-toxic, odorless and difficult to burn, raw materials do not need to be heated in the construction process, and safety accidents such as burning, asphalt poisoning and the like of constructors can be effectively avoided; the mixing proportion of the waste RAP can reach 50-90%, the requirements for new asphalt and new aggregate are reduced, the energy consumption in the process of mining mineral aggregate is saved, the road building cost is greatly reduced, and the social and economic benefits are obvious.
One of the key links of the emulsified asphalt cold regeneration technology is the selection and application of high-efficiency emulsified asphalt. In recent years, various modified emulsified asphalts have been developed by domestic road workers, such as: iris emasculation et al of China Petroleum Limited company adopts components such as asphalt, cationic emulsifier, copolymer latex and the like to develop emulsified asphalt which is mainly used for maintaining and curing a surface wearing layer of a newly-built pavement and an old pavement; zhoukai et al, Schchang Jinoett asphalt GmbH, developed a wide-range high-viscosity modified emulsified asphalt for asphalt pavement engineering using latex, polyolefin, polyacrylamide, dextrin, etc.; the material Huihai red of Jiangsu Longtian synthetic materials GmbH adopts phenolic resin, emulsified asphalt and other materials to develop phenolic resin modified emulsified asphalt which is mainly used for friction materials, refractory materials and casting materials; the SBS polymer modified emulsified asphalt is developed by Marpengcheng and high-quality Shumei of the petrochemical company Limited by adopting components such as SBS polymer modified emulsified asphalt, a composite emulsion stabilizer, acid and the like, and can be used for road adhesive layer, sealing layer, slurry sealing layer, surface treatment and the like.
Similar modified emulsified asphalt materials are abundant, but compared with foreign emulsified asphalt materials and technologies, the development of China is relatively lagged, and the main reason is that tests show that the low-temperature anti-cracking performance and the fatigue resistance of emulsified asphalt mixed with waste RAP are poor, and when more waste RAPs are added, the regeneration capacity of the emulsified asphalt mixed material is poor, so that the stability, the pavement performance and the durability of a regenerated asphalt mixture are directly influenced. Due to the reasons, the high-quality emulsified asphalt used for the high-efficiency cold regeneration technology is less, the comprehensive pavement performance of the high-quality emulsified asphalt is far from that of the foreign advanced emulsified asphalt material, and the application and development of the domestic cold regeneration technology are seriously hindered.
Disclosure of Invention
The invention aims to provide a nano modified emulsified asphalt for improving the compatibility and durability of a cold recycled asphalt mixture.
In order to achieve the purpose, the technical scheme of the invention provides nano modified emulsified asphalt which is prepared from the following raw materials in parts by mass: 1-5 parts of graphene, 5-15 parts of waste engine oil, 5-10 parts of desulfurized rubber powder, 20-35 parts of matrix asphalt, 2-4 parts of rubber and plastic stabilizer, 3-8 parts of SBR cationic styrene-butadiene latex, 2-5 parts of emulsifier and 25-35 parts of water.
The technical effect of the scheme is as follows: the nano modified emulsified asphalt is mainly used for a cold regeneration technology, can realize the regeneration and cyclic utilization of waste RAP, and after the desulfurized rubber powder, the graphene and the rubber-plastic stabilizer are mixed with the waste engine oil, the desulfurized rubber powder and the rubber-plastic stabilizer can generate more active groups, thereby being beneficial to the chemical bonding of the desulfurized rubber powder and the rubber-plastic stabilizer with a regenerated asphalt mixture and improving the dispersibility of the desulfurized rubber powder and the rubber-plastic stabilizer in the regenerated asphalt mixture; meanwhile, the graphene can be filled in the pores of the regenerated asphalt mixture, so that the flexibility of the cold regenerated asphalt mixture can be increased, the low-temperature crack resistance and the fatigue resistance of the regenerated asphalt mixture can be improved on the premise of ensuring other road performances, and the pain point of the regenerated asphalt mixture with poor low-temperature performance and fatigue cracking resistance can be solved, so that the durability of the cold regenerated asphalt mixture can be improved, and the service life of a cold regenerated asphalt pavement can be prolonged; and the SBR cationic styrene-butadiene latex and the emulsifier in the nano modified emulsified asphalt improve the bonding property between the asphalt and the aggregates, namely improve the compatibility between the asphalt and the aggregates, so that the stability of the regenerated asphalt mixture is obviously improved. Compared with the commonly applied modified emulsified asphalt in the current market, the nano modified emulsified asphalt not only can realize high-efficiency regeneration, but also can increase the compatibility and the adhesiveness between aggregate and asphalt, and has wider application prospect. And simultaneously, the desulfurized rubber powder and the waste engine oil used by the nano modified emulsified asphalt are industrial waste materials, so that the road performance of the emulsified asphalt can be improved while changing waste into valuable, and the social and economic benefits are remarkable.
Further, the nano modified emulsified asphalt is prepared from the following raw materials in parts by mass: 3 parts of graphene, 13 parts of waste engine oil, 7 parts of desulfurized rubber powder, 32 parts of matrix asphalt, 3 parts of a rubber and plastic stabilizer, 5 parts of SBR cationic styrene-butadiene latex, 3 parts of an emulsifier and 34 parts of water. The technical effect of the scheme is as follows: the low-temperature crack resistance and the fatigue resistance of the regenerated asphalt mixture under the proportioning condition are stronger.
Further, the nano modified emulsified asphalt is prepared from the following raw materials in parts by mass: 1 part of graphene, 13 parts of waste engine oil, 5 parts of desulfurized rubber powder, 33 parts of matrix asphalt, 3 parts of a rubber and plastic stabilizer, 6 parts of SBR cationic styrene-butadiene latex, 4 parts of an emulsifier and 35 parts of water. The technical effect of the scheme is as follows: the low-temperature crack resistance, the fatigue resistance and the compatibility of the regenerated asphalt mixture are all required to be improved under the proportioning condition, a direction is provided for more proper proportioning adjustment, and the influence of the contents of the graphene, the waste engine oil and the desulfurized rubber powder on the regenerated asphalt mixture is large.
Further, the nano modified emulsified asphalt is prepared from the following raw materials in parts by mass: 5 parts of graphene, 10 parts of waste engine oil, 10 parts of desulfurized rubber powder, 30 parts of matrix asphalt, 3 parts of a rubber-plastic stabilizer, 5 parts of SBR cationic styrene-butadiene latex, 3 parts of an emulsifier and 34 parts of water. The technical effect of the scheme is as follows: the low-temperature crack resistance, the fatigue resistance and the compatibility of the regenerated asphalt mixture are all better under the proportioning condition.
Further, the base asphalt is No. 70 base asphalt.
The invention also aims to provide a preparation method of the nano modified emulsified asphalt, which comprises the following steps:
step 1: carrying out dehydration and heavy metal impurity screening treatment on the waste engine oil;
step 2: shearing the desulfurized rubber powder, the matrix asphalt, the rubber-plastic stabilizer, the waste engine oil and the graphene at a high speed at a temperature of between 160 and 180 ℃ to form soft rubber-plastic modified asphalt;
and step 3: rapidly and uniformly stirring SBR cationic styrene-butadiene latex, water and an emulsifier at the temperature of 60-65 ℃ to obtain a mixed solution;
and 4, step 4: adding the soft rubber-plastic modified asphalt and the mixed solution into a colloid mill simultaneously, and shearing at a high speed and fully mixing at a temperature of between 80 and 100 ℃; wherein the shearing speed of the colloid mill is maintained at 1800 r/min-2100 r/min, and the shearing time is 8-12min, so as to obtain the liquid nano modified emulsified asphalt which can be used under the normal temperature condition.
The technical effect of the scheme is as follows: the waste engine oil from which heavy metals are removed can improve the quality of the nano modified emulsified asphalt, and simultaneously, the desulfurized rubber powder, the matrix asphalt, the rubber and plastic stabilizer, the waste engine oil and the graphene are mixed and sheared firstly, so that all components can be fully mixed, and the guarantee is provided for the high toughness of the nano modified emulsified asphalt; then mixing and shearing are carried out under the action of SBR cationic styrene-butadiene latex, water and an emulsifier, and a guarantee is provided for good compatibility between the aggregate and the nano modified emulsified asphalt on the premise of ensuring low-temperature crack resistance and fatigue resistance.
Further, the desulfurization rubber powder is subjected to desulfurization treatment at the temperature of 150-220 ℃ and under the pressure of 2-4 Mpa.
The invention also provides a using method of the nano modified emulsified asphalt, which comprises the following steps:
step 1: weighing nano modified emulsified asphalt, and uniformly stirring for later use;
step 2: weighing waste RAP materials, new aggregates and mineral powder which meet the grading requirement and the specified dosage, mixing, and stirring for 30-45 s to prepare a mixture A;
and step 3: adding specified amounts of cement and water into the mixture A, and stirring for 30-45 s to prepare a mixture B;
and 4, step 4: and (3) adding the nano modified emulsified asphalt obtained in the step (1) into the mixture B, fully stirring for 60-75 s at normal temperature to prepare a regenerated asphalt mixture, and paving for use at normal temperature.
The technical effect of the scheme is as follows: after the nano modified emulsified asphalt is added into the mixture B, the mixture B is stirred at normal temperature, the requirement on stirring environment is low, the construction is convenient, and the construction speed is indirectly improved.
Detailed Description
The following is further detailed by the specific embodiments:
example 1:
a preparation method of nano modified emulsified asphalt comprises the following steps:
step 1: carrying out dehydration and heavy metal impurity screening treatment on the waste engine oil, and carrying out desulfurization treatment on the desulfurized rubber powder at the temperature of 200 ℃ and the pressure of 2.5 Mpa;
step 2: shearing 7kg of desulfurized rubber powder, 32kg of No. 70 matrix asphalt, 3kg of rubber and plastic stabilizer, 13kg of waste engine oil and 3kg of graphene into soft rubber and plastic modified asphalt at a high speed at the temperature of 170 ℃;
and step 3: rapidly and uniformly stirring 5kg of SBR cationic styrene-butadiene latex, 34kg of water and 3kg of emulsifier at the temperature of 60 ℃ to obtain a mixed solution;
and 4, step 4: adding the soft rubber-plastic modified asphalt and the mixed solution into a colloid mill simultaneously, and shearing at a high speed and fully mixing at the temperature of 90 ℃; wherein the shearing speed of the colloid mill is maintained at 1900r/min, the shearing time is 10min, the nano modified emulsified asphalt is obtained, and the prepared nano modified emulsified asphalt is liquid and can be used under the normal temperature condition.
The application method of the nano modified emulsified asphalt comprises the following steps:
step 1: weighing 34kg of nano modified emulsified asphalt, and uniformly stirring for later use;
step 2: 880kg of waste RAP material, 100kg of new aggregate and 20kg of mineral powder which meet the grading requirement are weighed and mixed for 40 seconds to prepare a mixture A;
and step 3: adding 15kg of cement and 42kg of water into the mixture A, and stirring for 40s to prepare a mixture B;
and 4, step 4: and (3) adding the nano modified emulsified asphalt obtained in the step (1) into the mixture B, fully stirring for 70s at normal temperature to prepare a regenerated asphalt mixture, and paving for use at normal temperature.
Example 2:
the difference from example 1 is that: the proportion of the nano modified emulsified asphalt is different, and in the preparation method of the nano modified emulsified asphalt, 5kg of desulfurized rubber powder, 33kg of No. 70 matrix asphalt, 3kg of rubber and plastic stabilizer, 13kg of waste engine oil and 1kg of graphene are sheared into soft rubber and plastic modified asphalt at a high speed in step 1; in the step 3, 6kg of SBR cationic styrene-butadiene latex, 35kg of water and 4kg of emulsifier are quickly and uniformly stirred to obtain a mixed solution.
Example 3:
the difference from example 1 is that: the proportion of the nano modified emulsified asphalt is different, and in the preparation method of the nano modified emulsified asphalt, 10kg of desulfurized rubber powder, 30kg of No. 70 matrix asphalt, 3kg of rubber and plastic stabilizer, 10kg of waste engine oil and 5kg of graphene are sheared into soft rubber and plastic modified asphalt at a high speed in the step 1; in the step 3, 5kg of SBR cationic styrene-butadiene latex, 34kg of water and 3kg of emulsifier are quickly and uniformly stirred to obtain a mixed solution.
Example 4:
the difference from example 1 is that: the proportion of the nano modified emulsified asphalt is different, and in the preparation method of the nano modified emulsified asphalt, 5kg of desulfurized rubber powder, 20kg of No. 70 matrix asphalt, 2kg of rubber and plastic stabilizer, 5kg of waste engine oil and 1kg of graphene are sheared into soft rubber and plastic modified asphalt at a high speed in step 1; in the step 3, 3kg of SBR cationic styrene-butadiene latex, 25kg of water and 2kg of emulsifier are quickly and uniformly stirred to obtain a mixed solution.
Example 5:
the difference from example 1 is that: the proportion of the nano modified emulsified asphalt is different, and in the preparation method of the nano modified emulsified asphalt, 10kg of desulfurized rubber powder, 35kg of No. 70 matrix asphalt, 4kg of rubber and plastic stabilizer, 15kg of waste engine oil and 5kg of graphene are sheared into soft rubber and plastic modified asphalt at a high speed in the step 1; in the step 3, 8kg of SBR cationic styrene-butadiene latex, 35kg of water and 5kg of emulsifier are quickly and uniformly stirred to obtain a mixed solution.
And (3) experimental design:
fully stirring the nano modified emulsified asphalt A produced in the embodiment 1, the nano modified emulsified asphalt B produced in the embodiment 2, the nano modified emulsified asphalt C produced in the embodiment 3, the nano modified emulsified asphalt D produced in the embodiment 4 and the nano modified emulsified asphalt E produced in the embodiment 5 with waste RAP, mineral powder, new aggregate, cement and water according to a mixing ratio respectively, and preparing 5 groups of regenerated asphalt mixture test pieces at normal temperature for later use;
meanwhile, a comparison test group 1 (emulsified asphalt is prepared from the following raw materials of 13kg of waste engine oil, 10kg of desulfurized rubber powder, 32kg of No. 70 matrix asphalt, 3kg of rubber and plastic stabilizer, 5kg of SBR cationic styrene-butadiene latex, 3kg of emulsifier and 34kg of water) and a comparison test group 2 (emulsified asphalt is prepared from the following raw materials of 3kg of graphene, 13kg of waste engine oil, 7kg of desulfurized rubber powder, 32kg of No. 70 matrix asphalt, 3kg of rubber and plastic stabilizer, 8kg of emulsifier and 34kg of water) are prepared, the emulsified asphalt in the comparison test group 1 and the comparison test group 2 is fully stirred with the waste RAP, the mineral powder, the new aggregate, the cement and the water according to the mixing ratio, and 2 groups of regenerated asphalt mixture spare test pieces are prepared at normal temperature.
The method comprises the steps of verifying the basic mechanical property of a regenerated asphalt mixture test piece through a Marshall stability test, verifying the water stability and the compatibility of the regenerated asphalt mixture test piece through a freeze-thaw splitting test, verifying the low-temperature crack resistance of the regenerated asphalt mixture test piece through a trabecular low-temperature bending test, and verifying the fatigue resistance of the regenerated asphalt mixture test piece through a fatigue loading test.
The test results are shown in the following table:
the analysis of the test results shows that:
1. through the test comparison of the test piece doped with the contrast test group 1 and the nano modified emulsified asphalt C, although the doping amount of the desulfurized rubber powder in the contrast test group 1 is higher than that of the desulfurized rubber powder in the nano modified emulsified asphalt C, the test piece prepared by the contrast test group 1 is lower in each performance because the graphene is not doped, and therefore, whether the graphene is doped or not can be known to influence each performance of the test piece.
2. Compared with the regenerated asphalt mixture test piece prepared from the nano modified emulsified asphalt C, the regenerated asphalt mixture test piece prepared from the nano modified emulsified asphalt C can prove that the fatigue resistance and the compatibility of the test piece are improved due to high graphene doping amount, but simultaneously, the low-temperature crack resistance of the prepared test piece is influenced because the doping amount of the waste engine oil in the nano modified emulsified asphalt C is less than that of the nano modified emulsified asphalt A.
3. By comparing the test piece prepared by the comparative test group 2 with the test piece prepared by the nano modified emulsified asphalt A, it can be known that the SBR cationic styrene-butadiene latex has influence on various performances of the test piece.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the concept of the present invention, and these should be construed as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.
Claims (7)
1. A preparation method of nano modified emulsified asphalt is characterized by comprising the following steps:
step 1: preparing nano modified emulsified asphalt prepared from the following raw materials in parts by mass: 1-5 parts of graphene, 5-15 parts of waste engine oil, 5-10 parts of desulfurized rubber powder, 20-35 parts of matrix asphalt, 2-4 parts of rubber and plastic stabilizer, 3-8 parts of SBR cationic styrene-butadiene latex, 2-5 parts of emulsifier and 25-35 parts of water;
carrying out dehydration and heavy metal impurity screening treatment on the waste engine oil;
step 2: shearing the desulfurized rubber powder, the matrix asphalt, the rubber-plastic stabilizer, the waste engine oil and the graphene at a high speed at a temperature of between 160 and 180 ℃ to form soft rubber-plastic modified asphalt;
and step 3: rapidly and uniformly stirring SBR cationic styrene-butadiene latex, water and an emulsifier at the temperature of 60-65 ℃ to obtain a mixed solution;
and 4, step 4: adding the soft rubber-plastic modified asphalt and the mixed solution into a colloid mill simultaneously, and shearing at a high speed and fully mixing at a temperature of between 80 and 100 ℃; wherein the shearing speed of the colloid mill is maintained at 1800 r/min-2100 r/min, and the shearing time is 8-12min, so as to obtain the liquid nano modified emulsified asphalt which can be used under the normal temperature condition.
2. The preparation method of the nano modified emulsified asphalt as claimed in claim 1, wherein the nano modified emulsified asphalt is prepared from the following raw materials in parts by mass: 3 parts of graphene, 13 parts of waste engine oil, 7 parts of desulfurized rubber powder, 32 parts of matrix asphalt, 3 parts of a rubber and plastic stabilizer, 5 parts of SBR cationic styrene-butadiene latex, 3 parts of an emulsifier and 34 parts of water.
3. The preparation method of the nano modified emulsified asphalt as claimed in claim 1, wherein the nano modified emulsified asphalt is prepared from the following raw materials in parts by mass: 1 part of graphene, 13 parts of waste engine oil, 5 parts of desulfurized rubber powder, 33 parts of matrix asphalt, 3 parts of a rubber and plastic stabilizer, 6 parts of SBR cationic styrene-butadiene latex, 4 parts of an emulsifier and 35 parts of water.
4. The preparation method of the nano modified emulsified asphalt as claimed in claim 1, wherein the nano modified emulsified asphalt is prepared from the following raw materials in parts by mass: 5 parts of graphene, 10 parts of waste engine oil, 10 parts of desulfurized rubber powder, 30 parts of matrix asphalt, 3 parts of a rubber-plastic stabilizer, 5 parts of SBR cationic styrene-butadiene latex, 3 parts of an emulsifier and 34 parts of water.
5. The method for preparing nano modified emulsified asphalt according to claim 4, wherein the method comprises the following steps: the matrix asphalt is No. 70 matrix asphalt.
6. The method for preparing nano modified emulsified asphalt according to claim 1, wherein the method comprises the following steps: and the desulfurization rubber powder is subjected to desulfurization treatment at the temperature of 150-220 ℃ and under the pressure of 2-4 Mpa.
7. The method for using the nano modified emulsified asphalt prepared by the method according to claim 1, which is characterized by comprising the following steps:
step 1: weighing nano modified emulsified asphalt, and uniformly stirring for later use;
step 2: weighing waste RAP materials, new aggregates and mineral powder which meet the grading requirement and the specified dosage, mixing, and stirring for 30-45 s to prepare a mixture A;
and step 3: adding specified amounts of cement and water into the mixture A, and stirring for 30-45 s to prepare a mixture B;
and 4, step 4: and (3) adding the nano modified emulsified asphalt obtained in the step (1) into the mixture B, fully stirring for 60-75 s at normal temperature to prepare a regenerated asphalt mixture, and paving for use at normal temperature.
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| CN110982287A (en) * | 2019-12-16 | 2020-04-10 | 重庆交通大学 | Nano modified asphalt and preparation method thereof |
| CN112162090B (en) * | 2020-10-12 | 2023-03-03 | 南京林业大学 | Method for evaluating self-repairing performance of nano graphene oxide modified asphalt mixture |
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| CN102010603B (en) * | 2010-10-27 | 2012-07-04 | 周乃承 | Rubber powder modified emulsified asphalt and preparation method thereof |
| CN103951994A (en) * | 2014-05-08 | 2014-07-30 | 中海沥青（泰州）有限责任公司 | SBS (styrene butadiene styrene)/SBR (styrene butadiene rubber) composite modified emulsified asphalt and preparation method thereof |
| WO2016040612A1 (en) * | 2014-09-11 | 2016-03-17 | Garmor, Inc. | Graphite oxide entrainment in cement and asphalt composite |
| CN104559254B (en) * | 2014-11-11 | 2017-10-27 | 江苏苏博特新材料股份有限公司 | A kind of early-strength waste asphalt pavement cold renewal emulsion, its preparation method and its application |
| CN106147108A (en) * | 2015-04-16 | 2016-11-23 | 张家港志宇道路材料有限公司 | One directly mixes formula SBS modifier and preparation method thereof |
| CN105001786A (en) * | 2015-08-11 | 2015-10-28 | 山东大山路桥工程有限公司 | Dual modified emulsified asphalt and preparation method thereof |
| CN106280507B (en) * | 2016-08-17 | 2019-04-30 | 河南师范大学 | A kind of composite modified asphalt and preparation method thereof |
| CN106398536B (en) * | 2016-09-18 | 2019-04-12 | 科顺防水科技股份有限公司 | Anion-type water-thinned uncured rubber asphalt waterproof coating of one kind and preparation method thereof |
| CN106800788A (en) * | 2017-01-24 | 2017-06-06 | 中国海洋石油总公司 | A kind of modified emulsifying asphalt and preparation method thereof |
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