CN113185847A - Environment-friendly economical asphalt composition and application thereof - Google Patents
Environment-friendly economical asphalt composition and application thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention relates to an environment-friendly economical asphalt composition and application thereof, wherein the asphalt composition consists of rock asphalt, waste engine oil and aromatic oil, is solid at normal temperature, and is in a uniform flowing state when heated to more than 60 ℃. The invention breaks through the traditional technology, firstly proposes that the rock asphalt is adopted to replace the petroleum asphalt to be used as the asphalt matrix material, and organically combines the rock asphalt, the waste engine oil and the aromatic oil into a composition which is solid at normal temperature and can be converted into uniform flowing liquid after being heated to a certain temperature, thereby solving the problems of difficult utilization of the rock asphalt, complex process in application and the like and successfully realizing the application of the rock asphalt as the matrix asphalt. The asphalt composition of the invention is used as the base asphalt for road asphalt materials, building asphalt materials, waterproof coiled material asphalt materials and the like, and compared with the asphalt adopting petroleum asphalt as the base asphalt, the asphalt composition has equivalent or better asphalt base material performance, and can obviously reduce the cost and simplify the preparation process of the asphalt base material.
Description
Technical Field
The invention belongs to the technical field of asphalt materials, and particularly relates to an environment-friendly economical asphalt composition and application thereof.
Background
Asphalt is used in various fields of national economic construction, such as road and bridge construction, building waterproofing, corrosion prevention and the like. At present, most of asphalt materials are produced by petroleum refining enterprises and are generally blended by components such as vacuum residue, deoiled asphalt and the like. According to statistics, the yield of petroleum asphalt in 2019 of China is 5039.1 ten thousand tons, the apparent consumption is 5402.2 ten thousand tons, and therefore a gap of 400 ten thousand tons needs to be imported.
Rock asphalt is naturally formed asphalt, and compared with artificially blended petroleum asphalt, the rock asphalt contains more heteroatoms such as nitrogen, oxygen, sulfur and other elements, has higher weather resistance and stronger bonding force with stone materials. In addition, the asphaltene content in the rock asphalt is generally more than 15 percent, which is far greater than that of artificial asphalt, the softening point can reach more than 300 ℃ at most, and the rock asphalt has very high-temperature deformation resistance. Therefore, the characteristics of the rock asphalt are widely applied to the field of asphalt modification.
In the prior art, rock asphalt is basically used as a modifier of petroleum asphalt base materials. The rock asphalt is added to modify the matrix asphalt, so that the high-temperature rutting resistance, the water damage resistance, the ageing resistance and the strength of the mixture of the asphalt pavement can be improved. For example, CN106189291B discloses an Iranian natural rock asphalt modified asphalt and a preparation method thereof, wherein the modified asphalt comprises 15-20 parts of Iranian natural rock asphalt, 90-100 parts of matrix asphalt, 20-30 parts of aromatic oil, 15-30 parts of thermoplastic elastomer, 3-5 parts of stabilizer, 3-5 parts of compatilizer and 0.5-1 part of dispersant. Although the performance of petroleum asphalt materials can be improved by using the rock asphalt as a modifier, the method still has the following defects: firstly, the existing petroleum asphalt base material still needs to use a large amount of petroleum asphalt, but the petroleum asphalt in China has large gaps and depends on import, so that the cost is high and the material is limited by other countries; secondly, the rock asphalt is added as a modifier, the dosage of the rock asphalt is generally not more than 20%, the demand for the rock asphalt is small, and domestic abundant rock asphalt resources cannot be effectively utilized; thirdly, the rock asphalt usually contains high mineral content, has a density greatly different from that of petroleum asphalt, and is not easy to be fully mixed with the petroleum asphalt during production, so that the improvement effect is limited or a significantly more complex production process is required.
Other uses of rock asphalt have been proposed, for example, chinese patent CN105017782A discloses high grade road asphalt using rock asphalt. CN108148421A discloses a modified asphalt waterproof roll material using a buton rock asphalt. Although the reports can improve the application scene of the rock asphalt to a certain extent, the method does not substantially help to solve the problem that the gap of the petroleum asphalt is large in China. Also, their use with respect to rock asphalt is either relatively single or requires the use of a particular rock asphalt. The use of rock bitumen is also relatively limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the asphalt composition which can replace petroleum asphalt and is used for preparing the asphalt-based material, and obviously reduces the cost of the asphalt-based material on the premise of ensuring the performance of the asphalt-based material.
The invention also provides the application of the asphalt composition in preparing asphalt-based materials.
In order to achieve the purpose, the technical scheme is as follows:
an asphalt composition is composed of rock asphalt, used oil and aromatic oil, is solid at normal temperature, and is in a uniform flowing state when heated to above 60 ℃.
The normal temperature is also called room temperature, and the temperature is usually 10-30 ℃.
Further, the asphalt composition has a flowability when heated to 60 ℃ or higher and an excellent flowability when heated to 100 ℃ or higher.
According to some preferred and specific embodiments of the present invention, the rock asphalt accounts for 20 to 70%, the waste engine oil accounts for 10 to 30%, and the aromatic oil accounts for 20 to 70% of the total content of the asphalt composition by mass of 100%.
According to a preferred aspect of the invention, the particle size D90 of the rock asphalt is 1.0mm or less. Further preferably, the particle size D90 of the rock asphalt is 0.15mm or less.
According to a preferred aspect of the invention, the ash content of the rock asphalt is less than or equal to 10%. Further preferably, the ash content of the rock asphalt is 1% or less.
According to some embodiments of the invention, the rock asphalt is one or more of iran rock asphalt, north american rock asphalt, xinjiang rock asphalt, glacier rock asphalt, and buton rock asphalt.
According to a preferred aspect of the present invention, the proportion of the rock asphalt is adjusted in the range of 20 to 70% according to the rock asphalt source.
In some preferred and specific embodiments, the content of the irane rock asphalt is 30-50%, the content of the waste engine oil is 10-20%, and the content of the aromatic oil is 30-50% based on 100% of the total mass content of the asphalt composition.
In some preferred and specific embodiments, the content of the Qingchuan rock asphalt, the waste engine oil and the aromatic oil is 20-40%, 10-30% and 30-50% of the total content of the asphalt composition by mass is 100%.
In some preferred and specific embodiments, the Buton rock asphalt accounts for 50-70%, the waste engine oil accounts for 10-20%, and the aromatic oil accounts for 20-40% of the total content of the asphalt composition by mass of 100%.
The used oil refers to the lubricating oil which is replaced after the lubricating oil in the engine is used. Preferably, the used oil is the lubricating oil which is replaced after the lubricating oil in the automobile engine is used.
According to a preferred aspect of the present invention, the used oil has a kinematic viscosity at 100 ℃ of 12mm or more2(s), further preferably, the kinematic viscosity of the used oil at 100 ℃ is 12mm or more2Is less than or equal to 25 mm2/s。
According to a preferred aspect of the present invention, the ash content of the used oil is 1% or less, and the moisture content of the used oil is 0.1% or less.
According to a preferred aspect of the present invention, the aromatic component content in the aromatic oil is 50 to 70%.
According to a preferred aspect of the present invention, the aromatic oil is one or more of catalytic cracking slurry oil, furfural extract oil and rubber extender oil.
The catalytic cracking slurry oil is preferably subjected to solvent refining or vacuum distillation to remove a part of the wax component.
The furfural extract oil is preferably second-line distillate oil.
The rubber filling oil is oil used for plasticizing in a rubber processing process, and is also called rubber processing oil, a plasticizer and the like.
According to some preferred and specific implementation aspects of the present invention, the rock asphalt accounts for 30-70%, the waste engine oil accounts for 10-20%, and the aromatic oil accounts for 20-50% of the total content of the asphalt composition by mass of 100%.
In the invention, the adopted rock asphalt has low economic value compared with petroleum asphalt due to low content of light components, and the rock asphalt is less utilized except a small amount of rock asphalt used as an asphalt modifier in the prior art, so that the rock asphalt can be greatly widened in utilization. The waste engine oil adopted in the invention is waste which is difficult to be directly utilized, and the common recycling method is to treat the waste engine oil by a certain method to regenerate the waste engine oil, so that the method is more complex and has higher cost, and the performance of the regenerated engine oil is generally far inferior to that of fresh engine oil. The invention adopts the waste engine oil as the raw material, provides a new utilization method of the waste engine oil, and can be recycled by a simpler method. The aromatic oil adopted by the invention can be rubber filling oil directly purchased in the market, can also be catalytic cracking oil slurry or furfural extract oil which is a byproduct of a refinery, can be directly utilized, and can also have better effect after being treated by a certain method. On the whole, the raw material materials for preparing the asphalt composition are raw materials, wastes or by-products of refineries with low economic value, have wide sources and low cost, and have very high environmental protection significance and economic value.
The second technical scheme adopted by the invention is as follows: the preparation method of the asphalt composition comprises the steps of stirring and heating the used engine oil to 100-130 ℃, then adding the aromatic oil, stirring and heating to 130-160 ℃, then adding the rock asphalt, controlling the temperature to 130-200 ℃, and stirring until the rock asphalt is dissolved to obtain the asphalt composition.
According to some embodiments of the invention, the stirring time after adding the aromatic oil is 10-30 min, and the stirring time after adding the rock asphalt is 30-120 min.
According to some embodiments of the invention, the rock asphalt is added in two or more portions, and after each addition of the rock asphalt, the next addition is made after confirming that the rock asphalt is completely dissolved.
Rock asphalt is added into a mixture of waste engine oil and aromatic oil, the rock asphalt firstly absorbs a large amount of light components in the oil to swell, and if the rock asphalt is added in a whole process, rock asphalt particles can absorb a large amount of oil components in one process, so that the viscosity of the system is rapidly improved, and the stirring effect is adversely affected. And rock asphalt is added step by step, so that a part of rock asphalt is firstly dissolved in the system, the light components in the rock asphalt are released, the speed of the viscosity rise of the system can be slowed down, and meanwhile, the released light components have better solubility on the rock asphalt added in the next step, so that the mixing process is more controllable.
If the waste engine oil and the aromatic oil are mixed at room temperature, the aromatic oil has high viscosity at room temperature, and can hardly be uniformly dispersed when directly mixed with the waste engine oil, so that the subsequent dissolution of rock asphalt is influenced.
The third technical scheme adopted by the invention is as follows: the asphalt composition is used as matrix asphalt in asphalt materials for roads, asphalt materials for buildings and asphalt materials for waterproof rolls.
The base asphalt refers to asphalt which is not modified by various additives, and the proportion of the base asphalt in the asphalt base material is at least 50 percent.
The fourth technical scheme adopted by the invention is as follows: the preparation method of the asphalt material for the road comprises the step of mixing the asphalt composition with the polymer modifier.
Compared with the prior art, the preparation method of the asphalt material for roads has the advantages of obviously reduced cost, simple process method, less steps, easy process control and low cost.
According to some embodiments of the invention, the polymer modifier includes, but is not limited to, one or more of styrene-butadiene-styrene block copolymer (SBS), styrene-butadiene rubber (SBR), waste rubber. The waste rubber is a general name of leftover materials of rubber and waste rubber products which are not used any more, and mainly comes from waste tires and miscellaneous rubbers such as rubber shoes, pipes, plates and the like.
According to some preferred and specific embodiments of the present invention, the preparation method comprises adding the styrene-butadiene-styrene block copolymer into the asphalt composition at 170-190 ℃, dispersing for 20-40 minutes, then heating to 195-210 ℃, adding the waste rubber, and stirring to obtain the asphalt material for the road.
The fifth technical scheme adopted by the invention is as follows: the preparation method of the emulsified asphalt comprises the step of grinding and shearing the asphalt composition with an emulsifier, a stabilizer, a polymer latex modifier and water.
According to some embodiments of the invention, the polymer latex modifier is styrene-butadiene latex.
According to some preferred and specific embodiments of the present invention, the preparation method comprises dissolving the emulsifier, the polymer latex modifier, the stabilizer and water with stirring, adding the dissolved emulsifier, the polymer latex modifier, the stabilizer and the water into a colloid mill at 130-150 ℃, and grinding and shearing for 10-30 minutes to obtain the emulsified asphalt.
Compared with the existing method, the preparation method of the emulsified asphalt provided by the invention has the advantages of obviously reduced cost, simple process method, fewer steps, easy process control and low cost.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention breaks through the traditional technology, firstly proposes that the rock asphalt is adopted to replace petroleum asphalt to be used as a matrix asphalt material, and organically combines the rock asphalt, the waste engine oil and the aromatic oil into a composition which is solid at normal temperature and can be converted into uniform flowing liquid after being heated to a certain temperature, thereby solving the problems of difficult utilization of the rock asphalt, complex process in application and the like and successfully realizing the application of the rock asphalt as the matrix asphalt. The asphalt composition of the invention is used as the matrix asphalt for road asphalt materials, building asphalt materials, waterproof coiled material asphalt materials and the like, and compared with the asphalt adopting petroleum asphalt as the matrix asphalt, the asphalt composition has equivalent or better asphalt-based material performance, and can obviously reduce the cost and simplify the preparation process of the asphalt material. In addition, the asphalt composition adopts the rock asphalt and the waste engine oil as raw materials, so that the application fields of the rock asphalt and the waste engine oil are widened on one hand, the acquisition ways of the matrix asphalt are enriched on the other hand, and the shortage of the domestic petroleum asphalt yield is effectively made up.
The raw materials used by the asphalt composition are all raw materials with low economic value, wastes or by-products of refineries, have wide sources and low cost, and have very high environmental protection significance and economic value.
Detailed Description
According to the invention, the rock asphalt, the waste engine oil and the aromatic oil are organically combined to prepare a specific composition form, so that the substitution of the rock asphalt for the petroleum asphalt is realized. The asphalt composition is prepared by combining the waste engine oil and the aromatic oil (rock asphalt and the waste engine oil have great component and molecular weight difference, a great amount of asphaltenes in the rock asphalt cannot be stably dispersed in the waste engine oil, the problem of poor compatibility exists when the components are directly mixed, the mixture is easy to delaminate after long-term standing, the aromatic oil is added, the missing components in the combination of the waste engine oil and the rock asphalt can be supplemented, the effect of stabilizing asphaltene micelles is achieved, if the aromatic oil and the rock asphalt are heated and mixed, the light components in the aromatic oil are insufficient, the rock asphalt is difficult to fully dissolve, the obtained mixture has high temperature sensitivity, the waste engine oil is rich in naphthenic components, the aromatic oil and the rock asphalt are added into the composition, the temperature sensitivity can be effectively improved, the solubility of the rock asphalt is improved, the rock asphalt can be fully and effectively dissolved and stabilized, the composition is solid at normal temperature, the asphalt base material is convenient to transport, can present uniform and stable flow state after being heated to more than 60 ℃, is not easy to delaminate, and is easy to be uniformly mixed with other components forming the asphalt base material, thereby being convenient to apply and fully exerting various performances of the final material.
The technical solutions of the present invention are described in detail below with reference to specific examples so that those skilled in the art can better understand and implement the technical solutions of the present invention, but the present invention is not limited to the scope of the examples.
Example 1
The raw material formula of the environment-friendly economical asphalt composition provided by the embodiment comprises the following components: 15% of used engine oil, 40% of dewaxed catalytic cracking slurry oil and 45% of Iranite asphalt are prepared by the following steps:
(1) injecting waste engine oil into a reaction kettle with stirring and heating functions, starting stirring, and heating to 120 ℃;
(2) under the condition of starting stirring, injecting the catalytic cracking slurry subjected to dewaxing treatment into the reaction kettle, heating to 160 ℃, stirring for 30min at 160 ℃, and uniformly mixing;
(3) dividing the Iranite asphalt into two equal parts, adding the first part of Iranite asphalt at 160 ℃, stirring for 20min, heating to 190 ℃, then adding the second part of Iranite asphalt, stirring for 20min, observing that the Iranite asphalt is fully dissolved, and forming a uniform and fine blackish brown asphalt-like mixture in a reaction kettle to obtain the environment-friendly and economical asphalt composition.
In this example, the used oil is derived from the lubricating oil of an automobile engine and is replaced with the lubricating oil, and the characteristics thereof are as follows: viscosity of 18.5mm at 100 DEG C2(s), the water content was 0.06% and the ash content was 0.5%.
The catalytic cracking slurry oil is produced by a famous petrochemical catalytic cracking device, and is a product obtained by removing wax components through reduced pressure distillation, and the catalytic cracking slurry oil has the following characteristics: the content of aromatic components was 63.2%.
The Iranite bitumen had an ash content of 0.9% and a particle size (D90) of 0.045 mm.
Example 2
The raw material formula of the environment-friendly economical asphalt composition provided by the embodiment comprises the following components: 20 percent of waste engine oil, 50 percent of furfural extract oil and 30 percent of Qingchuan rock asphalt, and the preparation method comprises the following steps:
(1) injecting waste engine oil into a reaction kettle with stirring and heating functions, starting stirring, and heating to 100 ℃;
(2) under the condition of starting stirring, injecting furfural extract oil into the reaction kettle, heating to 135 ℃, and stirring for 30min to uniformly mix the furfural extract oil and the waste engine oil;
(3) dividing the Qingchuan rock asphalt into three equal parts, adding a first part of Qingchuan rock asphalt at 135 ℃, stirring for 20min, heating to 160 ℃, then adding a second part of Qingchuan rock asphalt, stirring for 20min, heating to 190 ℃, adding a third part of Qingchuan rock asphalt, stirring for 20min, observing that the Qingchuan rock asphalt is fully dissolved, and forming a uniform and fine blackish brown asphalt-like mixture in a reaction kettle to obtain the environment-friendly and economical asphalt composition.
In this example, the used oil is derived from the lubricating oil of an automobile engine and is replaced with the lubricating oil, and the characteristics thereof are as follows: viscosity of 20.1mm at 100 DEG C2(s), the water content was 0.08%, and the ash content was 0.6%.
The furfural extract oil is obtained from high-bridge petrochemical second-line-reduced extract oil and has the following characteristics: the content of aromatic components was 51.7%.
The ash content of the Qingchuan rock asphalt was 3.4%, and the particle size (D90) was 0.6 mm.
Example 3
The raw material formula of the environment-friendly economical asphalt composition provided by the embodiment comprises the following components: 10% of used engine oil, 20% of rubber extender oil and 70% of Buton rock asphalt, and the preparation method is as follows:
(1) injecting waste engine oil into a reaction kettle with stirring and heating functions, starting stirring, and heating to 110 ℃;
(2) under the condition of starting stirring, injecting rubber filling oil into the reaction kettle, heating to 150 ℃, and stirring for 20min at 150 ℃ to uniformly mix the rubber filling oil and the waste engine oil;
(3) dividing the Buton rock asphalt into three equal parts, adding a first part of Buton rock asphalt at 150 ℃, stirring for 30min, then adding a second part of Buton rock asphalt, stirring for 30min, heating to 170 ℃, adding a third part of Buton rock asphalt, stirring for 30min, observing that the Buton rock asphalt is fully dissolved, and forming a uniform and fine blackish brown asphalt-like mixture in a reaction kettle to obtain the environment-friendly economic asphalt composition.
In this example, the used oil is derived from the lubricating oil of an automobile engine and is replaced with the lubricating oil, and the characteristics thereof are as follows: viscosity at 100 ℃ of 14.4mm2(s), the water content was 0.07%, and the ash content was 0.5%.
The rubber extender oil is commercially available under the trade designation KA90 and has the following characteristics: the content of aromatic components was 55.7%.
The Buton rock asphalt had an ash content of 0.5% and a particle size (D90) of 0.15 mm.
Comparative example 1
The asphalt composition provided by the comparative example comprises the following components in raw material formula: 35% used oil, 20% dewaxed catalytically cracked slurry and 45% Iranite bitumen, otherwise as in example 1.
Comparative example 2
The asphalt composition provided by the comparative example comprises the following components in raw material formula: 5% used oil, 50% dewaxed catalytically cracked slurry and 45% Iranite bitumen, otherwise as in example 1.
Comparative example 3
The formulation and preparation of the asphalt composition provided in this comparative example were the same as in example 2 except for the selected rock asphalt, and a certain amount of undissolved rock asphalt particles were observed in the asphalt composition finally prepared.
In this example, the selected rock asphalt had an ash content of 3.4% and a particle size D90 of 3.9 mm.
Comparative example 4
The asphalt composition of this comparative example had a raw material formulation consisting of the following components: 5% used oil, 15% rubber extender oil and 80% Buton rock asphalt, otherwise as in example 3.
Application example 1
The asphalt compositions of the examples 1-3 and the comparative examples 1-4 are prepared into SBS/waste rubber powder composite modified asphalt according to the following method:
based on the total weight of the modified asphalt, 2% of LG501 type SBS is added into the asphalt compositions of the examples 1-3 and the comparative examples 1-4 at 180 ℃, the asphalt compositions are subjected to high-speed shearing and dispersion for 30 minutes, then the temperature is raised to 200 ℃, 25% of waste tire rubber powder with the particle size of 0.25-0.42 mm is added, the mixture is stirred for 60 minutes to obtain SBS/waste rubber powder composite modified asphalt, and the composite modified asphalt is subjected to performance test, wherein the results are shown in the following table 1:
table 1 shows the results of the performance tests of modified asphalts prepared using the asphalt compositions of examples 1 to 3 and comparative examples 1 to 4
As can be seen from the data in Table 1, the performances of the SBS/crumb rubber modified asphalt prepared from the asphalt compositions of examples 1-3 meet the technical indexes of SBS class I-C or I-D in the standard SH/T0734-2003 Polymer modified road asphalt.
In comparative example 1, the ductility of the modified asphalt was significantly higher than that of example 1, but the softening point was significantly lowered because too much used oil, which had a relatively light component and increased the low temperature ductility but had a negative effect on the softening point, was added to the formulation of the asphalt composition, and the modified asphalt prepared in comparative example 1 exhibited more viscous viscoelastic properties, more viscous and insufficient elastic recovery, and the asphalt composition could not recover its length before stretching after being cut short, and the elastic recovery was low. In comparative example 2, the viscosity-temperature performance of the modified asphalt was reduced, the low temperature ductility was greatly reduced, and the penetration was rapidly reduced because less used engine oil was added. The modified asphalt prepared in comparative example 3 had a low ductility at low temperature and poor storage stability because the rock asphalt particles used were large and could not be completely dissolved under the preparation conditions, the asphaltenes in the rock asphalt were not effectively dispersed in the mixture, and a certain amount of ore particles could be included in the rock asphalt, so that the modified asphalt accumulated stress at the undissolved rock asphalt particles and ore particles during ductility measurement was easily broken and also easily settled during storage. In the comparative example 4, because the asphalt composition contains more rock asphalt and less waste engine oil and aromatic oil, on one hand, SBS and waste rubber powder cannot be effectively swelled, SBS cannot be completely linearly spread in the asphalt composition to form a spatial three-dimensional structure, waste rubber powder cannot be effectively desulfurized to release flexible polymer chains, SBS and waste rubber powder do not form an organic whole with asphalt, so that the prepared modified asphalt has poor low-temperature ductility, and SBS and waste rubber powder are easy to settle in the high-temperature storage process.
Application comparative example 1
The SBS/crumb rubber composite modified asphalt is prepared from rock asphalt according to the traditional method when petroleum asphalt is adopted.
For example, the traditional method for preparing SBS/waste rubber powder composite modified asphalt by adopting petroleum asphalt comprises the following steps: heating 65% AH-70 petroleum base asphalt to 120 ℃, adding 8% furfural-reduced extract oil, stirring for 20min, heating to 180 ℃, adding 2% LG501 SBS, shearing at high speed for 30min, heating to 200 ℃, adding 25% waste tire rubber powder with the particle size of 0.25-0.45 mm, and stirring for 60 min to obtain the SBS/waste rubber powder composite modified asphalt.
The following are found in the experiment: in addition to the above-mentioned method, the use of rock asphalt instead of petroleum asphalt has no workability, and rock asphalt is difficult to melt even when heated to 200 ℃.
Application example 2
The asphalt composition obtained in example 1 was used to prepare a modified emulsified asphalt by the following method:
the modified emulsified asphalt comprises 60 parts of the asphalt composition of example 1, 2 parts of JY-R4 cationic emulsifier, 2 parts of JY-SBR60 cationic styrene-butadiene latex, 36 parts of deionized water and 0.3 part of JY-WD1 type stabilizer. The emulsifier, the styrene-butadiene latex and the stabilizer are added into deionized water at 50 ℃, stirred and fully dissolved, then quickly poured into a colloid mill together with the asphalt composition of the example 1 heated to 145 ℃, and discharged after being sheared at high speed for 20 minutes, so as to prepare the modified emulsified asphalt, wherein the performance indexes of the modified emulsified asphalt are shown in the following table 2.
TABLE 2 Properties of modified emulsified asphalt prepared using the asphalt composition of example 1
Therefore, the modified emulsified asphalt prepared according to the invention has the advantages of good emulsifying effect, excellent storage stability, high content of evaporation residues, high softening point, good adhesion with mineral aggregate and the like. Meanwhile, compared with the prior art, the method is simpler in process and more convenient to operate. Meanwhile, the main raw materials including rock asphalt, waste engine oil and the like are raw materials with low economic value, wastes or refinery byproducts, and have wide sources and low cost, so the method has very high environmental protection significance and economic value.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
Claims (14)
1. An asphalt composition, which is characterized by comprising rock asphalt, waste engine oil and aromatic oil, is solid at normal temperature, and is in a uniform flowing state when heated to more than 60 ℃.
2. The asphalt composition according to claim 1, wherein the rock asphalt is 20 to 70%, the used engine oil is 10 to 30%, and the aromatic oil is 20 to 70%, based on 100% by mass of the total asphalt composition.
3. The asphalt composition according to claim 1, characterized in that: the rock asphalt has the granularity D90 of less than or equal to 1.0mm and the ash content of less than or equal to 10 percent; and/or the rock asphalt is one or more of Iranian rock asphalt, North American rock asphalt, Sinkiang rock asphalt, Qingchuan rock asphalt and Buton rock asphalt.
4. The asphalt composition according to claim 1, characterized in that: the kinematic viscosity of the used oil at 100 ℃ is more than or equal to 12mm2S; and/or the ash content of the used oil is less than or equal to 1 percent, and the moisture content of the used oil is less than or equal to 0.1 percent.
5. The asphalt composition according to claim 1, characterized in that: the aromatic oil is one or more of catalytic cracking slurry oil, furfural extract oil and rubber filling oil, and the aromatic component content in the aromatic oil is 50-70%.
6. The asphalt composition according to claim 1, characterized in that: the asphalt composition comprises, by 100% of the total mass of the asphalt composition, 30-70% of rock asphalt, 10-20% of waste engine oil and 20-50% of aromatic oil.
7. A process for preparing the asphalt composition of any one of claims 1 to 6, wherein: the preparation method comprises the steps of stirring and heating the used engine oil to 100-130 ℃, then adding the aromatic oil, stirring and heating to 130-160 ℃, then adding the rock asphalt, controlling the temperature to 130-200 ℃, and stirring until the rock asphalt is dissolved to obtain the asphalt composition.
8. Use of the asphalt composition according to any one of claims 1 to 6 as a base asphalt in an asphalt material for roads, an asphalt material for buildings, and an asphalt material for waterproof rolls.
9. A preparation method of asphalt material for roads is characterized by comprising the following steps: comprising the step of mixing the asphalt composition of any one of claims 1 to 6 with a polymer modifier.
10. The method for producing an asphalt material for roads according to claim 9, characterized in that: the polymer modifier is one or more of styrene-butadiene-styrene block copolymer, styrene butadiene rubber and waste rubber.
11. The method for producing an asphalt material for roads according to claim 9, characterized in that: the preparation method comprises the steps of adding the styrene-butadiene-styrene block copolymer into the asphalt composition at 170-190 ℃, dispersing for 20-40 minutes, heating to 195-210 ℃, adding the waste rubber, and stirring to obtain the asphalt material for the road.
12. The preparation method of the emulsified asphalt is characterized by comprising the following steps: comprising the step of subjecting the asphalt composition of any one of claims 1 to 6 to grinding shear with an emulsifier, a stabilizer, a polymer latex modifier and water.
13. The process for producing emulsified asphalt according to claim 12, wherein: the polymer latex modifier is styrene-butadiene latex.
14. The process for producing emulsified asphalt according to claim 12, wherein: the preparation method comprises the steps of stirring and dissolving the emulsifier, the polymer latex modifier, the stabilizer and water, adding the mixture and the asphalt composition with the temperature of 130-150 ℃ into a colloid mill, and grinding and shearing for 10-30 minutes to obtain the emulsified asphalt.
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