CN108342089B - Modified emulsified asphalt and preparation method thereof - Google Patents
Modified emulsified asphalt and preparation method thereof Download PDFInfo
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- CN108342089B CN108342089B CN201710050540.4A CN201710050540A CN108342089B CN 108342089 B CN108342089 B CN 108342089B CN 201710050540 A CN201710050540 A CN 201710050540A CN 108342089 B CN108342089 B CN 108342089B
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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
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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
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
- C08L2555/54—Sulfur or carbon black
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Abstract
The invention relates to modified emulsified asphalt and a preparation method thereof, wherein the modified emulsified asphalt comprises the following raw materials in parts by mass: 40-50 parts of asphalt; 6-16 parts of sulfur; 2-10 parts of styrene-butadiene latex; 2-5 parts of cationic emulsifier, 0.1-2 parts of stabilizer, 0.5-3 parts of acid and 35-40 parts of water. The invention can simultaneously improve the high-temperature and low-temperature performances of the asphalt, save the asphalt, reduce the production cost, improve the high-temperature stability of the asphalt pavement, prevent the asphalt pavement from generating track, stripping and other diseases under the action of load, and improve the fatigue cracking resistance of the pavement.
Description
Technical Field
The invention belongs to the field of modified emulsified asphalt for highways, and particularly relates to modified emulsified asphalt and a preparation method thereof.
Background
At present, the method for modifying asphalt by using sulfur is to process sulfur and other additives into a sulfur modifier through a special process, when the asphalt mixture is mixed, the sulfur modifier replaces part of asphalt and is directly added into a mixing pot, and the sulfur is melted in the hot asphalt mixture to prepare the sulfur modified asphalt mixture. The existing sulfur modifier is mainly Shell SEAM, namely a sulfur-reinforced asphalt modifier, the main component of which is sulfur, and the sulfur modifier also contains a small amount of smoke inhibitor and plasticizer. The application mode has the defects that the temperature of the mixture cannot exceed 150 ℃, the time for transporting the mixture to a construction site from mixing is controlled within 1h, and otherwise, the smoke inhibitor volatilizes and loses effect along with the increase of the temperature and the increase of the time. Chinese patent CN201310033455.9 discloses an asphalt composite modifier, which is composed of sulfur or sulfur-enhanced asphalt modifier (SEAM) and gypsum whisker in a mass ratio of 1-2:1-2, wherein the sulfur or the SEAM and the gypsum whisker are cheap and easy to obtain, and can reduce the use amount of matrix asphalt and ensure that the performance of the composite modified asphalt meets the national standard requirement, thereby reducing the engineering cost. Chinese patent CN200410037665.6 discloses a sulfur modified asphalt mixture for paving asphalt pavement, the formula of the modified particles is 50-99.99% of sulfur, 0-49% of carbon, 0.01-1% of smoke inhibitor and 0-3% of plasticizer, the construction process is that the mixing temperature is not higher than 150 ℃, the rolling temperature is not lower than 90 ℃, the invention can effectively reduce the harmful gas in the construction process, and greatly improve the pavement quality.
The preparation method and the application mode of the sulfur modified asphalt belong to warm-mixed asphalt mixtures, and are realized by heating the mixtures at high temperature in a mixing pot, but the temperature of the mixtures cannot be too high, the storage time cannot be too long, otherwise sulfur can generate sulfur steam and H at high temperature2S、SO2And harmful gases and smoke with pungent odor not only pollute the environment, but also cause harm to human bodies.
Disclosure of Invention
The invention aims to provide modified emulsified asphalt and a preparation method thereof, which can simultaneously improve the high-temperature and low-temperature performances of asphalt, save the asphalt, reduce the production cost, improve the high-temperature stability of an asphalt pavement, prevent the asphalt pavement from generating track, peeling and other diseases under the action of load, and improve the fatigue cracking resistance of the pavement.
The invention relates to modified emulsified asphalt, which consists of the following raw materials in parts by mass:
40-50 parts of asphalt; 6-16 parts of sulfur; 2-10 parts of styrene-butadiene latex; 2-5 parts of cationic emulsifier, 0.1-2 parts of stabilizer, 0.5-3 parts of acid and 35-40 parts of water.
The asphalt is one of 70#, 90# or 110#, and is preferably 70#, 90# heavy traffic asphalt.
The sulfur is recovered in the petroleum refining process.
The styrene-butadiene latex is cationic emulsion-polymerized, has the solid content of 40-60 percent, has the styrene content of 22-25 percent and preferably has the solid content of 40 percent, and has good compatibility with asphalt, better low-temperature resistance and better freezing resistance.
The cationic emulsifier is alkylamine, amide or quaternary ammonium salt.
The alkylamine is one or two of alkyl propylene diamine and alkyl propylene triamine, the amide is one or two of N-aminoethyl amide or alkyl amido polyamine, and the quaternary ammonium salt is one or more of hexadecyl-nonadecyl trimethyl ammonium chloride, tetradecyl-octadecyl dimethyl hydroxyethyl ammonium chloride and hexadecyl trimethyl ammonium bromide.
Preferably, the quaternary ammonium salt is octadecyl trimethyl ammonium chloride.
The stabilizer is an organic high molecular material or inorganic salt. The organic polymer material is one or more of methylcellulose, polyvinyl alcohol, gelatin, starch, polyacrylamide, sodium carboxymethylcellulose or hydroxypropyl cellulose. The inorganic salt is preferably potassium chloride; the organic polymer material is preferably polyacrylamide.
The organic polymer material can improve the viscosity and density of a water phase, increase the resistance of brownian motion of asphalt particles and improve the stability of a modified emulsified asphalt system. The addition of the inorganic salt can enhance the double electric layer effect around emulsion particles, increase the zeta potential value, increase the mutual repulsion benefit among the particles, slow down the coagulation speed among the particles, improve the stability of the emulsion, particularly the low-temperature storage stability, and reduce the dosage of a quaternary ammonium salt emulsifier.
The acid is one of inorganic acids of hydrochloric acid, nitric acid and phosphoric acid or one of organic acids of formic acid, acetic acid, acrylic acid, succinic acid and adipic acid. The acid is preferably hydrochloric acid. The addition of acid can adjust the pH value, fully convert the cationic emulsifier into salt, dissolve the salt in water and reduce the dosage of the emulsifier at the same time.
The preparation method of the modified emulsified asphalt comprises the following preparation steps:
(1) adding liquid sulfur and asphalt into a reaction kettle, reacting for 1-1.5h at the temperature of 185 ℃ and cooling to 150 ℃ at the temperature of 130-;
(2) adding a cationic emulsifier into water, adding a stabilizer, adding an acid while stirring, adjusting the pH value to 3-5, preparing an emulsifier aqueous solution, and keeping the temperature at 50-65 ℃;
(3) under the action of an emulsifying machine, uniformly adding the sulfur modified asphalt with the temperature of 130-150 ℃ into the emulsion, emulsifying for 3-5min to obtain asphalt emulsion, adding the styrene-butadiene latex after the temperature of the emulsion is lower than 20-60 ℃, and uniformly stirring to obtain the sulfur modified emulsified asphalt.
The invention takes styrene-butadiene latex and sulfur as main modified materials.
The invention mixes liquid sulfur and asphalt in a reaction kettle, and then the mixture is reacted to prepare sulfur modified asphalt, and the sulfur modified asphalt is emulsified to obtain the sulfur modified emulsified asphalt. The modified emulsified asphalt with excellent high-temperature and low-temperature performances can be prepared by adding the styrene-butadiene latex into the sulfur modified emulsified asphalt through an external doping method.
The technical indexes of the modified emulsified asphalt prepared by the method, such as oversize allowance, storage stability, Engler viscosity, evaporation residue content, ductility and the like, meet the technical index requirements of JTGF40-2004 (JTGF40-2004)4.7.1-2 in Highway asphalt pavement construction technical Specifications of the Ministry of transportation.
Compared with the prior art, the invention has the following beneficial effects:
the sulfur modified emulsified asphalt prepared by the invention can greatly improve the softening point of the asphalt, improve the high-temperature performance of the asphalt, simultaneously has better low-temperature performance, can save the asphalt, reduce the production cost, not only can improve the strength and the stability of the asphalt pavement, prevent the asphalt pavement from generating track, stripping and other diseases under the load action, but also can improve the fatigue cracking resistance of the pavement. The sulfur modified emulsified asphalt avoids harmful gas generated by heating during site construction, is beneficial to the health of construction and constructors, and has great economic and social benefits.
The sulfur modified asphalt is prepared in a closed container, so that the harm of harmful gas generated by high-temperature heating of sulfur to the bodies of operators is avoided, and the low-temperature performance of the asphalt is improved by adding the styrene-butadiene latex in an external mixing method, so that the emulsified asphalt subjected to double modification has excellent performance and can be used for penetrating, bonding, sealing and treating the road surface.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The modified emulsified asphalt provided by the invention comprises the following raw materials in parts by mass:
55 parts of 110# heavy cross-linked asphalt, 6 parts of liquid sulfur, 2 parts of styrene-butadiene latex, 1 part of alkyl propylene diamine, 1 part of octadecyl trimethyl ammonium chloride, 0.1 part of polyacrylamide, 1.0 part of potassium chloride, 0.5 part of hydrochloric acid and 40 parts of water.
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) adding 6 parts of liquid sulfur and 55 parts of asphalt into a reaction kettle, reacting for 1.5 hours at 180 ℃, and cooling to 150 ℃.
(2) Weighing 1 part of cationic emulsifier alkyl propylene diamine and 1 part of octadecyl trimethyl ammonium chloride, adding into 40 parts of water, adding 0.1 part of polyacrylamide and 1.0 part of potassium chloride, stirring while adding 0.5 part of acid, adjusting pH to 3-5, and preparing into emulsifier aqueous solution and keeping 50 ℃;
(3) under the action of an emulsifying machine, uniformly adding the sulfur asphalt with the temperature of 140 ℃ into the emulsion, emulsifying for 3min to obtain asphalt emulsion, adding cationic styrene-butadiene latex after the temperature of the emulsion is lower than 60 ℃, and uniformly stirring to obtain the modified emulsified asphalt.
Example 2
The modified emulsified asphalt provided by the invention comprises the following raw materials in parts by mass: 50 parts of 110# heavy crosslinked asphalt, 6 parts of liquid sulfur, 2 parts of styrene-butadiene latex, 1 part of alkyl propylene diamine, 1 part of octadecyl trimethyl ammonium chloride, 0.1 part of polyacrylamide, 1.5 parts of potassium chloride, 0.5 part of hydrochloric acid and 40 parts of water.
Example 3
The modified emulsified asphalt provided by the invention comprises the following raw materials in parts by mass: 50 parts of 90# heavy cross-linked asphalt, 11 parts of liquid sulfur, 6 parts of styrene-butadiene latex, 1 part of alkyl propylene triamine, 2 parts of octadecyl trimethyl ammonium chloride, 0.3 part of polyacrylamide, 1.5 parts of potassium chloride, 1 part of hydrochloric acid and 40 parts of water.
Example 4
The modified emulsified asphalt provided by the invention comprises the following raw materials in parts by mass: 50 parts of 90# heavy cross-linked asphalt, 11 parts of liquid sulfur, 6 parts of styrene-butadiene latex, 1 part of alkyl propylene triamine, 2 parts of octadecyl trimethyl ammonium chloride, 0.3 part of polyacrylamide, 1.5 parts of potassium chloride, 1 part of hydrochloric acid and 40 parts of water.
Example 5
The modified emulsified asphalt provided by the invention comprises the following raw materials in parts by mass: 45 parts of No. 70 heavy-traffic asphalt, 16 parts of liquid sulfur, 10 parts of styrene-butadiene latex, 2 parts of alkyl propylene diamine, 3 parts of octadecyl trimethyl ammonium chloride, 0.5 part of polyacrylamide, 1.5 parts of potassium chloride, 3 parts of hydrochloric acid and 40 parts of water.
Example 6
The modified emulsified asphalt provided by the invention comprises the following raw materials in parts by mass: 45 parts of 70# heavy crosslinked asphalt, 16 parts of liquid sulfur, 10 parts of styrene-butadiene latex, 2 parts of alkyl propylene triamine, 3 parts of octadecyl trimethyl ammonium chloride, 0.5 part of polyacrylamide, 1.5 parts of potassium chloride, 3 parts of hydrochloric acid and 40 parts of water.
The preparation method of the embodiments 2-6 is the same as that of the embodiment 1, the temperature of the reaction mixture is reduced to 150 ℃ after the reaction of the sulfur and the asphalt in the embodiment 2, the temperature of the reaction mixture is reduced to 140 ℃ after the reaction of the sulfur and the asphalt in the embodiments 3 and 4, and the temperature of the reaction mixture is reduced to 130 ℃ after the reaction of the sulfur and the asphalt in the embodiments 5 and 6. The prepared modified emulsified asphalt is analyzed, and main performance indexes are detected, and the results are shown in table 1.
TABLE 1 EXAMPLES 1-6 Main Properties of modified emulsified asphalt
The standard in the table is the technical requirement of road emulsified asphalt in JTGF40-2004 technical Specification for road asphalt pavement construction issued by the Ministry of communications.
As can be seen from Table 1, the modified emulsified asphalt prepared by the invention can greatly improve the softening point of the asphalt and improve the performance of the asphalt. The price of the sulfur is about 800 yuan/ton, the price of the asphalt is about 2000 yuan/ton, and under the condition of ensuring the road performance, the larger the sulfur is added, the more the asphalt is saved, and the road building cost is greatly reduced.
Claims (3)
1. The modified emulsified asphalt is characterized by comprising the following raw materials in parts by mass:
40-50 parts of asphalt; 6-16 parts of liquid sulfur; 2-10 parts of styrene-butadiene latex; 2-5 parts of cationic emulsifier, 0.1-2 parts of stabilizer, 0.5-3 parts of acid and 35-40 parts of water;
the styrene-butadiene latex is cationic emulsion polymerization type, the solid content is 40-60%, and the content of bound styrene is 22-25%;
the stabilizer is an organic high polymer material or inorganic salt; wherein the organic polymer material is one or more of methylcellulose, polyvinyl alcohol, gelatin, starch, polyacrylamide, sodium carboxymethylcellulose or hydroxypropyl cellulose; the inorganic salt is potassium chloride;
the cationic emulsifier is alkylamine, amide or quaternary ammonium salt;
the acid is one of inorganic acids of hydrochloric acid, nitric acid and phosphoric acid and organic acids of formic acid, acetic acid, acrylic acid, succinic acid and adipic acid;
the preparation method of the modified emulsified asphalt comprises the following preparation steps:
(1) adding liquid sulfur and asphalt into a reaction kettle, reacting for 1-1.5h at the temperature of 185 ℃ and cooling to 150 ℃ at the temperature of 130-;
(2) adding a cationic emulsifier into water, adding a stabilizer, adding an acid while stirring, adjusting the pH value to 3-5, preparing an emulsifier aqueous solution, and keeping the temperature at 50-65 ℃;
(3) under the action of an emulsifying machine, uniformly adding the sulfur modified asphalt with the temperature of 130-150 ℃ into the emulsion, emulsifying for 3-5min to obtain asphalt emulsion, adding styrene-butadiene latex after the temperature of the emulsion is lower than 60 ℃, and uniformly stirring to obtain the sulfur modified emulsified asphalt.
2. The modified emulsified asphalt as set forth in claim 1, wherein said asphalt is one of 70#, 90#, and 110 #.
3. The modified emulsified asphalt as defined in claim 1, wherein the alkylamine is one or two of alkylpropylene diamine and alkylpropylene triamine, the amide is one or two of N-aminoethyl amide and alkylamido polyamine, and the quaternary ammonium salt is one or more of cetylnonadecyltrimethylammonium chloride, tetradecyldimethylhydroxyethylammonium chloride and hexadecyltrimethylammonium bromide.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110878193A (en) * | 2018-09-06 | 2020-03-13 | 中国石油化工股份有限公司 | Emulsified asphalt viscous layer oil and preparation method thereof |
| CN110791108A (en) * | 2019-10-23 | 2020-02-14 | 长安大学 | High-performance sulfur-based modified emulsified asphalt and preparation method thereof |
| CN112778783A (en) * | 2021-02-18 | 2021-05-11 | 胡杰 | Anti-rutting asphalt and preparation method thereof |
| CN115558308A (en) * | 2022-08-19 | 2023-01-03 | 中交一公局集团有限公司 | High-permeability emulsified asphalt permeable layer for asphalt pavement |
| CN116120757A (en) * | 2023-02-28 | 2023-05-16 | 喜跃发国际环保新材料股份有限公司 | Emulsified asphalt and preparation method thereof |
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| JPS62100555A (en) * | 1985-10-28 | 1987-05-11 | Daiwa Kobunshi Kogyo Kk | Rubber asphalt emulsion |
| CN101492571A (en) * | 2008-01-21 | 2009-07-29 | 上海喜若飞精细化工有限公司 | High-temperature behavior stable modified emulsified asphalt and method for preparing the same |
| CN101619149A (en) * | 2008-07-04 | 2010-01-06 | 天津市橡胶工业研究所 | Method for preparing cation emulsified rubber asphalt |
| CN103804930A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | 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 |
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- 2017-01-23 CN CN201710050540.4A patent/CN108342089B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62100555A (en) * | 1985-10-28 | 1987-05-11 | Daiwa Kobunshi Kogyo Kk | Rubber asphalt emulsion |
| CN101492571A (en) * | 2008-01-21 | 2009-07-29 | 上海喜若飞精细化工有限公司 | High-temperature behavior stable modified emulsified asphalt and method for preparing the same |
| CN101619149A (en) * | 2008-07-04 | 2010-01-06 | 天津市橡胶工业研究所 | Method for preparing cation emulsified rubber asphalt |
| CN103804930A (en) * | 2012-11-07 | 2014-05-21 | 中国石油化工股份有限公司 | 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 |
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