CN111087827B - Asphalt composite additive containing amorphous carbon and silicone rubber elastohydrodynamic and preparation method thereof - Google Patents
Asphalt composite additive containing amorphous carbon and silicone rubber elastohydrodynamic and preparation method thereof Download PDFInfo
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- CN111087827B CN111087827B CN201911325806.7A CN201911325806A CN111087827B CN 111087827 B CN111087827 B CN 111087827B CN 201911325806 A CN201911325806 A CN 201911325806A CN 111087827 B CN111087827 B CN 111087827B
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- asphalt
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses an asphalt composite additive containing amorphous carbon and silicone rubber elastofluid and a preparation method thereof, comprising a freezing point depressant and an anti-stripping agent which account for 80.0-95.0% of the total amount of the additive, wherein the freezing point depressant is one or more of amorphous carbon formed by organic alcohol through a friction reaction, and the anti-stripping agent is the silicone rubber elastofluid; adding freezing point depressant, anti-stripping agent, filler and anti-aging agent into toluene, heating and stirring, decompressing and steaming to remove solvent, extruding and granulating, and sieving to obtain the solid additive. The composite additive can reduce the performance of ice and snow freezing points, can be directly added into pavement asphalt, can obviously reduce the freezing points of the ice and snow on the asphalt pavement, and can obviously enhance the pavement performance of the asphalt pavement.
Description
Technical Field
The invention relates to an asphalt composite additive containing amorphous carbon and silicone rubber elastohydrodynamic fluid and a preparation method thereof, belonging to the technical field of asphalt pavement deicing and anti-stripping.
Background
In ice and snow weather, after the asphalt road is accumulated with snow and is frozen, the road surface is easy to slip, and particularly, traffic accidents are easy to cause on expressways due to high speed.
The main measures for treating the accumulated snow on the road surface at present are a physical removal method and a chemical ablation method. The use effect of the removal method is difficult to ensure, and the labor cost is high. The snow-melting agent in the chemical ablation method is a method which is used more in the ice and snow weather at present, and the research on the snow-melting deicing agent is more, for example, CN108949109A discloses a salt-storage slow-release snow-melting deicing agent and a preparation method thereof, wherein a chlorine salt saturated solution and a nano-silica modified diatomite suspension are stirred, vacuum-filtered, dried and crushed to obtain slow-release inorganic salt; and then the mixture is mixed with isopropanol or propylene glycol methyl ether and a wrapping polymer to form the snow-melting deicing agent, the snow-melting substance is not limited by temperature control molecules, the release time of the snow-melting substance is long, and the ice-melting amount is high. However, these snow melting agents contain substances that corrode road materials, equipment and motor vehicles, and may also cause some degree of environmental pollution. Related patents of introducing corrosion inhibitors into a pavement deicing agent taking organic acid salts as freezing point depressants are reported more, and emphasis is placed on solving the corrosion of the deicing agent on certain metal materials. CN102277134A discloses a formic acid type snow-melting agent, wherein a corrosion inhibition system consists of silicate, sodium metaaluminate, sodium carbonate and organic phosphate containing phosphoryl groups, and the seaworthiness of the corrosion inhibition system is evaluated according to AMS 1431C. The material which can slowly release and reduce the freezing point is added into the road asphalt, so that the problem of road icing in ice and snow weather can be effectively reduced.
The adhesiveness of the basalt aggregate or diabase aggregate adopted by the highway and asphalt is poor, and a proper anti-stripping agent is mixed in the paving process, wherein some abrasion-increasing fiber materials or certain anti-stripping particles are common. The organic silicon microsphere is a multifunctional special organic silicon resin microsphere, is snowy white regular free-flowing spherical fine powder, has a three-dimensional cross-linked reticular molecular structure, shows excellent waterproofness and excellent heat resistance and dispersion performance, and has wide application and numerous application fields. CN110229519A discloses an asphalt composite additive of silicon-containing rubber elastofluid, which comprises a freezing point depressant and an anti-stripping agent accounting for 90.0-99.0% of the total amount of the additive, wherein the freezing point depressant is one or more of inorganic sodium salt, inorganic potassium salt, inorganic calcium salt, inorganic magnesium salt and inorganic barium salt modified by organic carboxylic acid; the anti-stripping agent is a silicone rubber elastofluid prepared by carrying out accelerated vulcanization on vinyl silicone oil and different hydrogen-containing silicone oil in water at 60-70 ℃ for 5 hours under the action of 1305 and 1309 compound emulsifier and platinum complex catalyst, drying and crushing. The silicone rubber elastohydrodynamic fluid is compounded with organic carboxylic acid modified inorganic salt, so that the freezing point of ice and snow can be reduced. However, the use of silicone elastomer fluid and amorphous carbon composite as an asphalt freezing point depressant has not been reported.
Disclosure of Invention
One of the purposes of the invention is to provide an asphalt composite additive containing amorphous carbon and silicone rubber elastofluid, which is convenient to use and strong in stripping resistance and can meet the requirement of safe running of a locomotive on an asphalt pavement in ice and snow weather.
The invention also aims to provide a preparation method of the asphalt composite additive containing the amorphous carbon and the silicone rubber elastofluid, which has simple steps.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an asphalt composite additive containing amorphous carbon comprises an freezing point depressant and an anti-stripping agent which account for 80.0-95.0% of the total amount of the additive, wherein the freezing point depressant is one or more of amorphous carbon obtained by organic alcohol through a friction reaction; the anti-stripping agent is silicone elastic fluid.
Furthermore, the asphalt composite additive also comprises a filler, wherein the filler accounts for 0.0-10.0% of the total amount of the additive.
Furthermore, the asphalt composite additive also comprises an anti-aging agent, and the anti-aging agent accounts for 0.0-10.0% of the total amount of the additive.
Preferably, the organic alcohol is an aliphatic alcohol.
More preferably, the fatty alcohol is a straight-chain fatty alcohol with a carbon chain of less than 5 carbons.
Preferably, the silicone rubber elastic fluid is prepared by accelerating vulcanization of vinyl silicone oil and different hydrogen-containing silicone oil in water at 60-70 ℃ under the action of an emulsifier and a catalyst, and drying and crushing.
Preferably, the filler is one or more of urea-formaldehyde resin, epoxy resin, terpene resin, rosin modified resin and octyl phenolic resin.
Preferably, the anti-aging agent is one or more of benzotriazole, hindered amine and benzophenone anti-aging agents.
The invention also provides a preparation method of the asphalt composite additive containing amorphous carbon, which comprises the following steps:
(1) rubbing a certain amount of organic alcohol on a friction tester to form a friction liquid;
(2) adding the friction liquid, the anti-stripping agent and the filler into toluene, and reacting for 2-3 hours in a stirring reactor at the temperature of 80-90 ℃;
(3) after mixing evenly, adding an anti-aging agent, continuing stirring for 1.0 hour, and removing unreacted alcohol and a toluene solvent by reduced pressure distillation;
(4) and when the solid is formed, extruding, granulating and screening to obtain the solid type powder additive with the particle size of 3-5 mm.
The use method of the asphalt composite additive containing the amorphous carbon and the silicone rubber elastofluid comprises the following steps: the asphalt composite additive containing amorphous carbon and silicon rubber elastic fluid is added into pavement asphalt according to a proper proportion, and is uniformly stirred with stone at the temperature of 180 ℃ and 200 ℃ for paving, so that the asphalt composite additive is used for road construction.
Compared with the prior art, the invention has the following beneficial effects:
1. the asphalt composite additive is prepared by compounding amorphous carbon and silicone rubber elastofluid, so that the asphalt composite additive has the advantages of good dispersibility, good stability, safety, environmental protection, good flowing property, good weather resistance and strong adhesion with asphalt, can improve the mechanical property of the asphalt and can obviously enhance the pavement performance of asphalt pavement.
2. The asphalt composite additive can reduce the freezing point of ice and snow, eliminate and prevent the icing phenomenon of the asphalt pavement on the pavement after the snow melts into water in ice and snow weather, has overlong anti-icing retention time (at least 72 hours), has anti-stripping performance, and prolongs the service life of the pavement.
3. The asphalt composite additive is safe to locomotive materials and has no corrosion to main metal material parts of roads and bridges.
4. The preparation process is simple, no special production equipment is needed, and the preparation process is pollution-free.
Detailed Description
The embodiments and effects of the present invention are further illustrated by the following specific examples.
In the following embodiments, the anti-stripping agent is a silicone elastomer prepared by accelerating vulcanization of vinyl silicone oil and different hydrogen-containing silicone oils in water at 60-70 ℃ for 5 hours under the action of 1305 and 1309 compound emulsifiers and platinum complex catalysts, drying, and crushing.
Example 1
30.0g of methanol was reacted on a four-ball machine under a load of 98N and at 1500rpm for 60 minutes in a manner that a friction liquid was used as a freezing point depressant, 1.0g of a silicone elastomer prepared by polymerizing vinyl silicone oil and 38% hydrogen-containing silicone oil was used as an anti-peeling agent, 0.2g of a rosin-modified resin was used as a filler, added to toluene, and reacted in a stirred reactor at 80 ℃ for 2 hours. After the mixture is evenly mixed, the solvent is evaporated under reduced pressure, and the solid powder additive with the diameter of 3-5mm is obtained by extrusion granulation.
Example 2
30.0g of ethanol is rubbed on a four-ball machine under the load of 98N and at 1500rpm for 60 minutes to obtain a friction liquid as a freezing point depressant, 1.0g of silicone rubber elastofluid formed by polymerizing vinyl silicone oil and 40% hydrogen silicone oil is used as an anti-stripping agent, 0.15g of terpene resin is used as a filling agent and added into toluene, and the mixture is stirred in a reactor at 90 ℃ for reaction for 3 hours. After the mixture is evenly mixed, the solvent is evaporated under reduced pressure, and the solid powder additive with the diameter of 3-5mm is obtained by extrusion granulation.
Example 3
30.0g of propanol was reacted in a four-ball mill under a load of 98N and at 1500rpm for 60 minutes in the form of a friction liquid as a freezing point depressant, 1.5g of a silicone elastomer prepared by polymerizing vinyl silicone oil and 40% hydrogen-containing silicone oil as an anti-peeling agent, 0.16g of a rosin-modified resin as a filler, and the mixture was added to toluene and reacted in a stirred reactor at 90 ℃ for 3 hours. After mixing evenly, heating to about 120 ℃, adding 0.3g of bis (1,2,2,6, 6-pentamethylpiperidinol) sebacate, continuing stirring for 1.0 hour, evaporating the solvent under reduced pressure, and performing extrusion granulation to obtain the solid powder additive with the particle size of 3-5 mm.
Example 4
30.0g of propanol was put on a four-ball machine, under 196N load, the frictional fluid after the frictional reaction for 60 minutes at 1500rpm was used as freezing point depressant, 1.8g of silicone rubber elastofluid polymerized from vinyl silicone oil and 50% hydrogen silicone oil was used as anti-stripping agent, 0.3g of urea resin was used as filler, added to toluene, and reacted in a stirred reactor at 80 ℃ for 2 hours. After mixing uniformly, heating to 120 ℃, adding 0.3g of 2- (2H-benzotriazole-2-yl) -4, 6-di-tert-amylphenol, continuing stirring for 1.0 hour, then decompressing, evaporating to remove the solvent, and performing extrusion granulation to obtain the solid powder additive with the thickness of 3-5 mm.
Example 5
30.0g of N-butanol was reacted in a four-ball mill under a load of 196N and at 1500rpm for 60 minutes to obtain a friction liquid as a freezing point depressant, 1.5g of a silicone elastomer prepared by polymerizing vinyl silicone oil and 40% hydrogen-containing silicone oil as an anti-peeling agent, 0.35g of an octyl phenol resin as a filler, and the resultant was added to toluene and reacted in a stirred reactor at 90 ℃ for 2 hours. After being mixed evenly, the temperature is raised to 120 ℃, 0.15g of 2-hydroxy-4-methoxybenzophenone is added, the mixture is stirred for 1.5 hours, the solvent is removed by evaporation under reduced pressure, and the mixture is extruded and granulated to obtain the solid powder additive with the particle size of 3-5 mm.
Example 6
The penetration test was carried out on each of the samples obtained in examples 1 to 5 in a T0604 test method in a CXS-2801 type fully automatic asphalt penetration tester, the unit being 0.1mm, and the test results are shown in Table 1.
TABLE 1 asphalt penetration values (0.1mm) for different additive contents
Example 7
The ductility value of each sample at 25 ℃ is measured in a SY-2.0C type asphalt ductility instrument according to a standard test method, the unit cm is obtained, and the stretching speed is 5 cm/min. The results are shown in Table 2.
TABLE 2 ductility of different amounts of additives
Example 8
Freeze resistance test for preparing additives
The compacted core sample (the oilstone ratio is 5.5%, and the additive content is 5.2%) of the asphalt pavement is placed in a freezing area of a refrigerator to be frozen, and the freezing condition is observed after 72 hours, so that the surface of the core sample containing the synthetic additive is almost free of ice as the surface of the core sample added with a commercial freezing point depressant (Limei).
Example 9
According to the Marshall test mix proportion design standard of the asphalt stabilized macadam mixture, the oil-stone ratio is 5.5%, the water absorption of Marshall test pieces is measured, and the water absorption of the test pieces is less than 2% and meets the technical standard.
The asphalt composite additive containing amorphous carbon and silicon rubber elastic fluid is added into pavement asphalt according to a proper proportion, and is uniformly stirred with stone at the temperature of 180 ℃ and 200 ℃ for paving, so that the asphalt composite additive is used for road construction. The asphalt composite additive is added into the asphalt mixture, so that the frost resistance of the pavement can be improved, the pavement is prevented from freezing at low temperature, and the service life of the asphalt pavement is prolonged.
Claims (9)
1. An asphalt composite additive containing amorphous carbon and silicone rubber elastohydrodynamic is characterized by comprising a freezing point depressant and an anti-stripping agent which account for 80.0-95.0% of the total amount of the additive, wherein the freezing point depressant is one or more of amorphous carbon obtained by organic alcohol through a friction reaction, and the friction reaction is as follows: rubbing organic alcohol on a four-ball machine under the load of 98N-196N at 1500rpm for 60 minutes to obtain a freezing point depressant; the anti-stripping agent is silicone elastic fluid.
2. The additive composition of claim 1, wherein the additive composition further comprises a filler, wherein the filler is present in an amount of 0.1 to 10.0% by weight of the total additive composition.
3. The asphalt mixture additive containing amorphous carbon and silicone rubber elastofluid according to claim 2, characterized in that it further comprises an anti-aging agent, said anti-aging agent being present in an amount of 0.1-10.0% of the total amount of the additive.
4. The asphalt complex additive containing amorphous carbon and silicone elastomer as claimed in claim 1, wherein said organic alcohol is a fatty alcohol.
5. The asphalt additive package comprising amorphous carbon and silicone elastomer according to claim 4 wherein the fatty alcohol is a straight chain fatty alcohol having a carbon chain of less than 5 carbons.
6. The asphalt complex additive as claimed in claim 1, wherein said silicone elastomer is prepared from vinyl silicone oil and different hydrogen-containing silicone oils by accelerated vulcanization in water at 60-70 deg.C under the action of emulsifier and catalyst, drying, and pulverizing.
7. The asphalt complex additive containing amorphous carbon and silicone elastomer fluid as claimed in claim 2, wherein said filler is one or more of urea formaldehyde resin, epoxy resin, terpene resin, rosin modified resin and octyl phenol formaldehyde resin.
8. The asphalt complex additive containing amorphous carbon and silicone rubber elastofluid according to claim 3, characterized in that the anti-aging agent is one or more of benzotriazoles, hindered amines and benzophenones.
9. A method for preparing the asphalt complex additive containing amorphous carbon and silicone elastomer fluid as claimed in claim 3, comprising the steps of:
(1) rubbing organic alcohol on a four-ball machine under the load of 98N-196N at 1500rpm for 60 minutes to form a rubbing liquid;
(2) adding the friction liquid, the silicon rubber elastic fluid and the filler into toluene, and reacting for 2-3 hours in a stirring reactor at the temperature of 80-90 ℃;
(3) after mixing evenly, adding an anti-aging agent, continuing stirring for 1.0 hour, and removing unreacted alcohol and a toluene solvent by reduced pressure distillation;
(4) and when the solid is formed, extruding, granulating and screening to obtain the solid type powder additive with the particle size of 3-5 mm.
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| CN112098318A (en) * | 2020-08-20 | 2020-12-18 | 广西交科集团有限公司 | Four-ball friction test evaluation method for adhesion performance of asphalt and coarse aggregate |
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