CN113512297B - Composite modified asphalt doped with waste engine oil residues and polyphosphoric acid and preparation method thereof - Google Patents
Composite modified asphalt doped with waste engine oil residues and polyphosphoric acid and preparation method thereof Download PDFInfo
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- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/329—Phosphorus containing acids
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Abstract
The invention discloses a composite modified asphalt doped with waste engine oil residues and polyphosphoric acid and a preparation method thereof, and belongs to the technical field of modified asphalt preparation. The invention relates to a composite modified asphalt doped with waste engine oil residues and polyphosphoric acid, which comprises the following raw materials in parts by weight: 100 parts of asphalt, 1-10 parts of polyphosphoric acid, 1-30 parts of waste engine oil residues and 1-15 parts of flame retardant. The composite modified asphalt is prepared by the steps of preheating, premixing, shearing, development reaction, adding a flame retardant and the like. The technical scheme of the invention can recycle a large amount of waste engine oil residues, solves the bottleneck problem restricting the development of the waste engine oil processing industry, greatly saves the processing cost and lightens the environmental and resource pressure.
Description
Technical Field
The invention belongs to the technical field of modified asphalt preparation, and particularly relates to composite modified asphalt doped with waste engine oil residues and polyphosphoric acid and a preparation method thereof.
Background
With the great application of asphalt pavements in high-grade roads and the increasing of traffic, in order to improve the service performance of asphalt pavements, the use of modified asphalt to improve the performance of asphalt pavements is one of the common means, however, the traditional single polymer modified asphalt belongs to physical modification, and has more defects in the aspects of modification effect, preparation process, storage stability and application cost.
With the rapid increase of vehicles such as automobiles, airplanes and the like, 2500 to 3000 million tons of waste engine oil (REO) are generated in the transportation industry in China every year, 70 to 80 percent of REO can be produced into fuel oil or lubricating oil through processes such as ultrafiltration, centrifugal separation, molecular distillation, flocculation treatment, solvent refining and the like, and the rest 20 to 30 percent of REO becomes real waste engine oil Residues (REOB) because more impurities are mixed and cannot be effectively recovered. The REOB generated in China every year is about 100 ten thousand tons, the harmless treatment cost is huge, and the effective recycling of the REOB becomes a big problem which needs to be overcome urgently in China.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the composite modified asphalt mixed with the waste engine oil residues and the polyphosphoric acid, the waste engine oil residues are fully utilized, the bottleneck problem restricting the development of the waste engine oil processing industry is solved, the processing cost is greatly saved, the environmental and resource pressure is reduced, meanwhile, the composite modified asphalt can replace the traditional modified asphalt such as SBS, SBR and the like, and the road performance of the asphalt mixture is ensured.
The technical scheme of the invention is as follows:
the composite modified asphalt doped with waste engine oil residues and polyphosphoric acid consists of the following raw materials in parts by mass: 100 parts of asphalt, 1-10 parts of polyphosphoric acid, 1-30 parts of waste engine oil residues and 1-15 parts of flame retardant.
Preferably, the composite modified asphalt comprises the following raw materials in parts by weight: 100 parts of asphalt, 2-8 parts of polyphosphoric acid, 5-25 parts of waste engine oil residues and 5-10 parts of flame retardant.
In one technical scheme, the composite modified asphalt comprises the following raw materials in parts by weight: 100 parts of asphalt, 5 parts of polyphosphoric acid, 15 parts of waste engine oil residues and 8 parts of flame retardant.
On the basis of the technical scheme, the asphalt is common road petroleum asphalt, and preferably, the asphalt is No. 70 road petroleum asphalt.
On the basis of the technical scheme, the polyphosphoric acid is industrial-grade polyphosphoric acid with the purity of 115%.
Polyphosphoric acid is used as an organic chemical product, and is combined with asphalt to belong to chemical modification, active groups such as hydroxyl, imino, sulfydryl and the like in asphalt molecules generate chemical reaction with polyphosphoric acid, the original micelle structure of asphaltene is changed, the high-temperature stability and the ageing resistance can be obviously enhanced, the cost of polyphosphoric acid modified asphalt is only 30-50% of that of SBS modified asphalt, and the polyphosphoric acid modified asphalt has the advantages of simple preparation process, good compatibility and storage stability and low price.
On the basis of the scheme, the waste engine oil residue is residue generated after the waste engine oil is subjected to ultrafiltration, centrifugal separation, molecular distillation, flocculation treatment and solvent refining process treatment; the waste engine oil residues can be classified into waste hydraulic oil residues, waste refrigerator oil residues, waste transformer oil residues and waste lubricating oil residues according to the source of the waste engine oil, and the waste engine oil residues of the types can be used in the invention.
On the basis of the scheme, the flame retardant is one of aluminum hydroxide, magnesium hydroxide, sodium metaborate, ammonium polyphosphate, decabromodiphenylethane and decabromodiphenylether.
The preparation method of the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid comprises the following steps:
(1) preheating
Respectively heating the waste engine oil residues and the asphalt to 150-160 ℃, and respectively stirring uniformly before use;
(2) shearing for premixing
Conveying the waste machine oil residues and asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 8-12 r/min, the premixing time is 15-20 min, the premixing temperature is 150-160 ℃, the pre-stirred mixture is conveyed to a machine for shearing, the shearing speed is 4000 + 5000r/min, the shearing time is 20-30 min, the shearing temperature is 150-160 ℃, and polyphosphoric acid is added for 4-6 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, stirring at the speed of 8-12 r/min and at the constant temperature of 160 +/-5 ℃, continuously stirring for 30min, and detecting the pH value of the asphalt mixture;
(4) adding a flame retardant
Adding a corresponding flame retardant according to the acidity and alkalinity of the asphalt mixture, adjusting the pH value to 6.8-7.5, and uniformly stirring to form the composite modified asphalt mixed with the waste engine oil residues and polyphosphoric acid.
On the basis of the scheme, the development reaction system is a storage cylinder with stirring and constant temperature functions.
On the basis of the scheme, a flame retardant is quantitatively added according to the target pH value range, and when the pH value of the asphalt mixture is more than 7.5, sodium metaborate or ammonium polyphosphate is added; when the pH value of the asphalt mixture is more than or equal to 6.8 and less than or equal to 7.5, adding decabromodiphenyl ethane or decabromodiphenyl ether; when the pH value of the asphalt mixture is less than 6.8, adding aluminum hydroxide or magnesium hydroxide; and (3) measuring the pH value of the asphalt mixture in real time, and stopping adding the flame retardant when the pH value reaches a target range to obtain the using amount of the flame retardant.
The invention has the beneficial effects that:
(1) the invention can recycle a large amount of waste engine oil residues and is used for paving the asphalt pavement of road engineering, thereby solving the bottleneck problem restricting the development of the waste engine oil processing industry, greatly saving the processing cost and reducing the environmental and resource pressure.
(2) The invention utilizes polyphosphoric acid and waste engine oil residues to modify asphalt, and REOB is mixed into common road petroleum asphalt to obviously improve the low-temperature performance of the asphalt, while the addition of polyphosphoric acid can improve the high-temperature performance of the asphalt and simultaneously improve the anti-aging performance of the asphalt. Not only replaces the expensive SBS and SBR modifiers, but also has simple preparation process, convenient use, low price and obvious economic and social benefits.
(3) The flame retardant has the function of reducing the ignition point of the flammable polymer, also has acidic, alkaline or neutral pH value, and is purposefully added with the acidic, alkaline or neutral flame retardant by utilizing the pH values of different flame retardants according to the pH value of the modified asphalt, so that the stability of metal in REOB is ensured, the metal is prevented from becoming an ionic state, the flash point and the ignition point of the asphalt are improved, and the construction safety is ensured.
Detailed Description
The terms used in the present invention have generally the meanings that are commonly understood by those of ordinary skill in the art, unless otherwise specified.
The present invention is described in further detail below with reference to specific examples and data. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
The preparation method for preparing the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid comprises the following steps:
(1) preheating
Respectively heating 0.5kg of waste engine oil residues and 10.0kg of No. 70 road petroleum asphalt to 150 ℃, and respectively stirring uniformly before use, wherein the waste engine oil residues are waste lubricating oil residues treated by centrifugal separation and molecular distillation processes;
(2) shearing for premixing
Conveying the waste engine oil residues and No. 70 road petroleum asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 8r/min, the premixing time is 15min, the premixing temperature is 150 ℃, the mixture is conveyed into a machine for shearing after premixing, the shearing speed is 4000r/min, the shearing time is 20min, the shearing temperature is 150 ℃, and 0.2kg of polyphosphoric acid is added in 4 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, wherein the system is a storage cylinder with stirring and constant-temperature functions, the stirring speed is 8r/min, the constant temperature is 160 +/-5 ℃, the stirring is continuously carried out for 30min, and the pH value of the asphalt mixture is measured to be 6.2;
(4) adding a flame retardant
Adding 0.5kg of aluminum hydroxide into the developed asphalt mixture, adjusting the pH value to 7.0, and uniformly stirring to obtain the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid.
Example 2
The preparation method for preparing the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid comprises the following steps:
(1) preheating
Respectively and rapidly heating 2.5kg of waste engine oil residues and 10.0kg of No. 70 road petroleum asphalt to 160 ℃, and respectively and uniformly stirring before use, wherein the waste engine oil residues are waste lubricating oil residues treated by centrifugal separation and molecular distillation processes;
(2) shearing for premixing
Conveying the waste machine oil residues and No. 70 road petroleum asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 12r/min, the premixing time is 20min, the premixing temperature is 160 ℃, the mixture is conveyed to a machine for shearing after premixing, the shearing speed is 5000r/min, the shearing time is 30min, the shearing temperature is 160 ℃, and 0.8kg of polyphosphoric acid is added in 6 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, wherein the system is a storage cylinder with stirring and constant-temperature functions, the stirring speed is 12r/min, the constant temperature is 160 +/-5 ℃, the stirring is continued for 30min, and the pH value of the asphalt mixture is measured to be 5.5;
(4) adding a flame retardant
Adding 1.0kg of aluminum hydroxide into the developed asphalt mixture, adjusting the pH value to 7.0, and uniformly stirring to obtain the composite modified asphalt doped with the waste engine oil residues and polyphosphoric acid.
Example 3
The preparation method for preparing the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid comprises the following steps:
(1) preheating
Respectively and rapidly heating 1.5kg of waste engine oil residues and 10.0kg of No. 70 road petroleum asphalt to 155 ℃, and respectively and uniformly stirring before use, wherein the waste engine oil residues are waste lubricating oil residues treated by centrifugal separation and molecular distillation processes;
(2) shearing for premixing
Conveying the waste engine oil residues and No. 70 road petroleum asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 10r/min, the premixing time is 20min, the premixing temperature is 155 ℃, the mixture is conveyed into a machine for shearing after premixing, the shearing speed is 4500r/min, the shearing time is 25min, the shearing temperature is 155 ℃, and 0.5kg of polyphosphoric acid is added in 5 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, wherein the system is a storage cylinder with stirring and constant-temperature functions, the stirring speed is 10r/min, the constant temperature is 160 +/-5 ℃, the stirring is continued for 30min, and the pH value of the asphalt mixture is measured to be 6.0;
(4) adding a flame retardant
Adding 0.8kg of aluminum hydroxide into the developed asphalt mixture, adjusting the pH value to 7.0, and uniformly stirring to obtain the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid.
Comparative example 1
The preparation method of the modified asphalt mixed with the waste engine oil residues comprises the following steps:
(1) preheating
Respectively and rapidly heating 1.5kg of waste engine oil residues and 10.0kg of No. 70 road petroleum asphalt to 155 ℃, and respectively and uniformly stirring before use, wherein the waste engine oil residues are waste lubricating oil residues treated by centrifugal separation and molecular distillation processes;
(2) shearing for premixing
Conveying the waste machine oil residues and No. 70 road petroleum asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 10r/min, the premixing time is 20min, the premixing temperature is 155 ℃, and after premixing, conveying the mixture into a machine for shearing, wherein the shearing speed is 4500r/min, the shearing time is 25min, and the shearing temperature is 155 ℃;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, wherein the system is a storage cylinder with stirring and constant-temperature functions, the stirring speed is 10r/min, the constant temperature is 160 +/-5 ℃, the stirring is continued for 30min, and the pH value of the asphalt mixture is measured to be 6.1;
(4) adding a flame retardant
Adding 0.7kg of aluminum hydroxide into the developed asphalt mixture, adjusting the pH value to 7.0, and uniformly stirring to obtain the modified asphalt doped with the waste engine oil residues.
Comparative example 2
The preparation method of the modified asphalt doped with polyphosphoric acid comprises the following steps:
(1) preheating
Rapidly heating 10.0kg of No. 70 road petroleum asphalt to 155 ℃, and uniformly stirring before use;
(2) shearing for premixing
Feeding No. 70 road petroleum asphalt into a machine for shearing, wherein the shearing rate is 4500r/min, the shearing time is 25min, the shearing temperature is 155 ℃, and 0.5kg of polyphosphoric acid is added in 5 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, wherein the system is a storage cylinder with stirring and constant-temperature functions, the stirring speed is 10r/min, the constant temperature is 160 +/-5 ℃, the stirring is continuously carried out for 30min, and the pH value of the asphalt mixture is measured to be 6.5;
(4) adding a flame retardant
Adding 0.3kg of aluminum hydroxide into the developed asphalt mixture, adjusting the pH value to 7.0, and uniformly stirring to obtain modified asphalt doped with polyphosphoric acid.
Comparative example 3
The preparation method for preparing the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid comprises the following steps:
(1) preheating
Respectively and rapidly heating 1.5kg of waste engine oil residues and 10.0kg of No. 70 road petroleum asphalt to 140 ℃, and respectively and uniformly stirring before use, wherein the waste engine oil residues are waste lubricating oil residues treated by centrifugal separation and molecular distillation processes;
(2) stirring the mixture
Feeding the waste engine oil residues and No. 70 road petroleum asphalt into a machine for shearing, wherein the shearing rate is 3000r/min, the shearing time is 15min, the shearing temperature is 140 ℃, adding 0.5kg of polyphosphoric acid at one time to obtain the composite modified asphalt doped with the waste engine oil residues and the polyphosphoric acid, and measuring the pH value of the composite modified asphalt to be 6.2.
Comparative example 4
The preparation method of the composite modified asphalt mixed with the engine oil and the polyphosphoric acid comprises the following steps:
(1) preheating
1.5kg of engine oil and 10.0kg of No. 70 road petroleum asphalt are respectively and rapidly heated to 155 ℃, and are respectively and uniformly stirred before use, and the used engine oil is homologous with the waste engine oil residues in the embodiments 1-3 and is a source of the waste engine oil residues;
(2) shearing for premixing
Conveying engine oil and No. 70 road petroleum asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 10r/min, the premixing time is 20min, the premixing temperature is 155 ℃, the engine oil and the No. 70 road petroleum asphalt are conveyed into a machine for shearing after premixing, the shearing speed is 4500r/min, the shearing time is 25min, the shearing temperature is 155 ℃, and 0.5kg of polyphosphoric acid is added in 5 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, wherein the system is a storage cylinder with stirring and constant-temperature functions, the stirring speed is 10r/min, the constant temperature is 160 +/-5 ℃, the stirring is continued for 30min, and the pH value of the asphalt mixture is measured to be 6.3;
(4) adding a flame retardant
Adding 0.6kg of aluminum hydroxide into the developed asphalt mixture, adjusting the pH value to 7.0, and uniformly stirring to obtain the composite modified asphalt doped with the engine oil and the polyphosphoric acid.
The composite modified asphalt prepared in examples 1 to 3 and comparative examples 1 to 4 were subjected to conventional index detection and comparative detection of high-temperature performance and low-temperature performance in accordance with the technical Specification for construction of asphalt road surface for road (JTG F40-2004) issued by the Ministry of transportation, and the test conditions were as follows:
asphalt conventional index detection
(1) Testing instrument
The tester comprises a penetrometer (Jinan special fortune apparatus company), a ductility meter (Wuxi city petroleum apparatus equipment company limited), a softening point tester (Beijing Zhongkejian instrument electronic technology company limited), a rotational viscometer (Wuxi city petroleum apparatus equipment company limited), a film heating oven (Shandongdouda highway apparatus company), a Cleveland open cup type flash point tester (Shanghai Changji geological apparatus company limited), and an oven (Shandongdouda highway apparatus company).
(2) Detection method
The test was carried out according to "test procedure for asphalt and asphalt mixture for road engineering" JTG E20-2011 of Ministry of transportation.
(3) The result of the detection
The results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the conventional indexes of the polyphosphoric acid modified asphalt mixed with the waste engine oil residues in the examples 1-3 all meet the requirements of the technical standard issued by the ministry of China; as can be seen from comparative examples 1 and 2, the indexes of the modified asphalt only blended with the waste engine oil residue or polyphosphoric acid do not meet the requirements of the technical standards issued by the national ministry; as can be seen from the example 3 and the comparative example 3, the preparation method of the invention can effectively prepare the waste engine oil residue and the polyphosphoric acid composite modified asphalt, and the preparation parameter ranges are reasonable and effective; compared with the flash point indexes and the pH values of the embodiments 1-3 and the comparative example 3, the flash point of the asphalt can be effectively improved by adding the flame retardant, the higher the addition amount of the flame retardant is, the higher the flash point of the asphalt is, and when the flame retardant is not added, the flash point of the composite modified asphalt of the waste engine oil residue and the polyphosphoric acid does not meet the technical requirements, and in addition, the pH value of the modified asphalt can be effectively regulated by adding the flame retardant.
Dynamic shear rheology test
(1) Test instrument
Dynamic shear rheometer (usa), oven (santoda highway instruments), scraper (commercially available).
(2) Detection method
The test is carried out according to the test method of T0628-2011 in the test Specification for asphalt and asphalt mixtures for road engineering (JTG E20-2011) of the Ministry of transportation.
(3) The result of the detection
The results are shown in Table 2.
Low temperature bending creep test
(1) Test instrument
Curved beam rheometer (usa), oven (shandongda highway instruments), cryostat (shandongda highway instruments), scraper (commercially available).
(2) Detection method
The test is carried out according to a T0627-2011 test method in road engineering asphalt and asphalt mixture test regulation (JTG E20-2011) of the Ministry of transportation.
(3) The result of the detection
The results are shown in Table 2.
TABLE 2
From the examples 1-3, it can be known that the high-temperature performance of the asphalt can be obviously enhanced by adding polyphosphoric acid, the high-temperature performance is improved along with the increase of the doping amount of polyphosphoric acid, the low-temperature performance of the asphalt can be improved by adding waste engine oil residues, the higher the doping amount of the waste engine oil residues is, the better the low-temperature performance of the asphalt is, and the asphalt obtained according to the proportion of the example 2 has the best high-temperature and low-temperature performance; as can be seen from examples 1-3 and comparative examples 1-2, the modified asphalt blended with only the waste engine oil residue had better low-temperature properties, but the high-temperature properties became worse, and the high-temperature properties blended with only polyphosphoric acid were better, but the low-temperature properties deteriorated, and the composite modified asphalt blended with the waste engine oil residue and polyphosphoric acid had better high-temperature and low-temperature properties than the modified asphalt blended with either component alone; as can be seen from examples 1-3 and comparative example 3, the preparation method of the present invention has reasonable setting of each process parameter range, and is a better method for preparing modified asphalt with excellent high-temperature and low-temperature performance, and the performance of the modified asphalt obtained within the process parameter range which is not the method of the present invention is inferior to that of the modified asphalt obtained by the method of the present invention; as can be seen from examples 1 to 3 and comparative example 4, in the technical scheme of the invention, the waste engine oil residues play a role in improving the low-temperature performance of the modified asphalt, but not the engine oil. In conclusion, the high-temperature and low-temperature performances of the modified asphalt mixed with the waste engine oil residues and the polyphosphoric acid are superior to those of road petroleum asphalt and are consistent with the performance level of SBS modified asphalt.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (1)
1. A preparation method of composite modified asphalt doped with waste engine oil residues and polyphosphoric acid comprises the following steps:
(1) preheating
Respectively heating the waste engine oil residues and the asphalt to 150-160 ℃, and respectively stirring uniformly before use;
(2) shearing for premixing
Conveying the waste engine oil residues and the asphalt to a high-speed shearing and premixing system for premixing, wherein the premixing speed is 8-12 r/min, the premixing time is 15-20 min, the premixing temperature is 150-160 ℃, the pre-stirred mixture is conveyed to a machine for shearing, the shearing speed is 4000 and 5000r/min, the shearing time is 20-30 min, the shearing temperature is 150-160 ℃, and polyphosphoric acid is added for 4-6 times;
(3) developmental responses
Conveying the asphalt mixture subjected to high-speed shearing to a development reaction system, continuously stirring for 30min at a stirring speed of 8-12 r/min and a constant temperature of 160 +/-5 ℃, and detecting the pH value of the asphalt mixture;
(4) adding a flame retardant
Adding a corresponding flame retardant according to the acidity and alkalinity of the asphalt mixture, and adjusting the pH value to 6.8-7.5; for the addition of the flame retardant, the flame retardant is quantitatively added according to the target pH value range, and when the pH value of the asphalt mixture is more than 7.5, ammonium polyphosphate is added; when the pH value of the asphalt mixture is more than or equal to 6.8 and less than or equal to 7.5, decabromodiphenyl ethane or decabromodiphenyl ether is added; when the pH value of the asphalt mixture is less than 6.8, adding aluminum hydroxide or magnesium hydroxide; after adding the flame retardant, uniformly stirring to form the composite modified asphalt mixed with the waste engine oil residues and polyphosphoric acid;
the preparation method comprises the following raw materials in parts by weight: 100 parts of asphalt, 2-8 parts of polyphosphoric acid, 5-25 parts of waste engine oil residues and 5-10 parts of flame retardant; the waste engine oil residue is one of waste hydraulic oil residue, waste refrigerator oil residue, waste transformer oil residue and waste lubricating oil residue.
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| CN103194072A (en) * | 2013-04-25 | 2013-07-10 | 交通运输部公路科学研究所 | Complex modified asphalt composition and preparation method thereof |
| CN105038280A (en) * | 2015-09-22 | 2015-11-11 | 长安大学 | SBS modified asphalt and preparation method thereof |
| CN108587202A (en) * | 2018-04-29 | 2018-09-28 | 西安科技大学 | A kind of bottom of tower oil rubber modified bitumen and preparation method thereof |
| CN109370240A (en) * | 2018-10-15 | 2019-02-22 | 高秀阁 | Environment protection modified pitch and its production technology |
-
2021
- 2021-05-25 CN CN202110573558.9A patent/CN113512297B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194072A (en) * | 2013-04-25 | 2013-07-10 | 交通运输部公路科学研究所 | Complex modified asphalt composition and preparation method thereof |
| CN105038280A (en) * | 2015-09-22 | 2015-11-11 | 长安大学 | SBS modified asphalt and preparation method thereof |
| CN108587202A (en) * | 2018-04-29 | 2018-09-28 | 西安科技大学 | A kind of bottom of tower oil rubber modified bitumen and preparation method thereof |
| CN109370240A (en) * | 2018-10-15 | 2019-02-22 | 高秀阁 | Environment protection modified pitch and its production technology |
Non-Patent Citations (2)
| Title |
|---|
| 多聚磷酸改性生物沥青性能试验研究;薛朝辉;《合成材料老化与应用》;20210427;第50卷(第2期);第48-52页 * |
| 废机油残留物在沥青混合料中的应用研究进展;冯振刚等;《中国科技论文》;20210215;第16卷(第2期);第121-127页 * |
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