CN112812579A - Direct-throwing asphalt particles for pavement repair and preparation method thereof - Google Patents
Direct-throwing asphalt particles for pavement repair and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a direct-throwing asphalt particle for pavement repair and a preparation method thereof, wherein the direct-throwing asphalt particle is prepared from the following raw materials in parts by weight and is obtained by mechanical granulation: 15-25 parts of aromatic hydrocarbon oil, 1-4 parts of asphalt anti-aging agent, 2-4 parts of SBS modifier, 3-10 parts of waste rubber powder, 25-40 parts of C5 petroleum resin and 20-35 parts of C9 petroleum resin. According to the invention, the direct-throwing type asphalt particle finished product is asphalt particles mechanically granulated by asphalt particle granulation equipment, is clean and tidy, is easy to pack and transport, and is convenient to store for a long time; in addition, the invention does not contain large-particle aggregates, not only has the possibility of mechanical granulation, but also greatly reduces the weight of the product, thereby greatly reducing the transportation cost. In addition, the invention has good performance and convenient use.
Description
Technical Field
The invention relates to the technical field of asphalt pavement repairing and maintenance, in particular to a direct-throwing asphalt particle for pavement repairing and a preparation method thereof.
Background
The asphalt pavement has the characteristics of high flatness, low noise, comfortable driving, convenient maintenance and the like, and is widely applied to expressways and municipal roads. However, due to the age of traffic and the combined action of traffic load and environmental factors, the asphalt pavement may suffer from road surface aging, cracking, pits and other defects with the lapse of time, thereby affecting the service life of traffic and roads. Therefore, the asphalt pavement with the disease needs to be repaired and maintained in time.
In general, hot-patch asphalt mixtures and cold-patch asphalt mixtures are mainly used for repairing cracks, pits, and damages of asphalt pavements. The cooling speed is slow after the hot patching asphalt mixture is constructed, so the operation time is long. At present, cold-patch asphalt mixture is selected to carry out pavement repair and maintenance more.
The Chinese invention patent CN 107235663A discloses an asphalt pavement cold patching material, which comprises aggregate, matrix asphalt, a modified additive, a diluent and an additive, wherein the aggregate is prepared from basalt, dolomite and diabase according to a mass ratio, the matrix asphalt is any one of 70# petroleum asphalt and 90# petroleum asphalt, the diluent is prepared by mixing corn oil, isostearic acid and linoleic acid according to a mass ratio, the additive is any one of gamma-aminopropyl triethoxysilane and isopropyl tri (dioctyl pyrophosphato oxy) titanate, the modified additive is prepared by grinding and calcining vermiculite and coke, then ball-milling the mixture with magnesium borate, and then stirring and mixing the ball-milled mixture with ethylene-vinyl acetate copolymer, isobutyl ester and coumaric acid. In the above scheme, the following disadvantages exist:
(1) basalt, dolomite, diabase and the like are selected as aggregates, and the prepared asphalt pavement cold patching material is usually in a loose pile form, is unfixed in form and is inconvenient to transport and store.
(2) The cold patch material added with the aggregate is generally required to be used in a short time, and is easy to cause caking phenomenon after being stored for a long time.
(3) The cold-patch material has large proportion of aggregate and heavy weight, so the transportation cost is increased.
In view of the above, there is an urgent need to improve the existing asphalt pavement cold-patch materials so as to facilitate transportation, long-term storage and use.
Disclosure of Invention
In view of the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide a direct vat asphalt granule for pavement repair and a preparation method thereof, so as to solve the problems of low condensation speed of the cold patch liquid of the existing asphalt pavement, poor anti-rutting performance of the prepared cold patch, low strength, easy degranulation, easy cracking at low temperature, inconvenient transportation and storage, etc.
Therefore, the direct-throwing asphalt particles for pavement repair are prepared from the following raw materials in parts by weight and obtained by mechanical granulation:
15-25 parts of aromatic hydrocarbon oil, 1-4 parts of asphalt anti-aging agent, 2-4 parts of SBS modifier, 3-10 parts of waste rubber powder, 25-40 parts of C5 petroleum resin and 20-35 parts of C9 petroleum resin.
In the above technical solution, preferably, 5 to 15 parts of inorganic black toner is further added to the raw materials.
In the above technical solution, preferably, the raw materials are in parts by weight: 15 parts of aromatic hydrocarbon oil, 3 parts of asphalt anti-aging agent, 3 parts of SBS modifier, 8 parts of waste rubber powder, 40 parts of C5 petroleum resin, 26 parts of C9 petroleum resin and 5 parts of inorganic black toner.
In the above technical solution, preferably, the raw materials are in parts by weight: 18 parts of aromatic hydrocarbon oil, 1 part of asphalt anti-aging agent, 2 parts of SBS modifier, 6 parts of waste rubber powder, 30 parts of C5 petroleum resin, 35 parts of C9 petroleum resin and 8 parts of inorganic black toner.
In the above technical solution, preferably, the raw materials are in parts by weight: 22 parts of aromatic hydrocarbon oil, 1.5 parts of asphalt anti-aging agent, 3.5 parts of SBS modifier, 3 parts of waste rubber powder, 40 parts of C5 petroleum resin, 15 parts of C9 petroleum resin and 15 parts of inorganic black toner.
In the above technical solution, preferably, the raw materials are in parts by weight: 20 parts of aromatic hydrocarbon oil, 2.5 parts of asphalt anti-aging agent, 2.5 parts of SBS modifier, 5 parts of waste rubber powder, 35 parts of C5 petroleum resin, 25 parts of C9 petroleum resin and 10 parts of inorganic black toner.
In the above technical solution, preferably, the raw materials are in parts by weight: 25 parts of aromatic hydrocarbon oil, 4 parts of asphalt anti-aging agent, 4 parts of SBS modifier, 10 parts of waste rubber powder, 25 parts of C5 petroleum resin, 20 parts of C9 petroleum resin and 12 parts of inorganic black toner.
The invention also provides a preparation method of the direct-vat-set asphalt particles for stirring the asphalt pavement cold-patch additive, which comprises the following steps:
mixing aromatic hydrocarbon oil and an asphalt anti-aging agent, uniformly stirring at the temperature of 40-80 ℃, and keeping the temperature for 1-2 hours to obtain a substance A;
mixing and stirring the SBS modifier and the waste rubber powder uniformly to obtain a substance B;
adding petroleum resin C5 and petroleum resin C9 into the substance A, uniformly mixing, keeping the temperature at 50-65 ℃ for 1-2 hours, adding the substance B, and uniformly stirring to obtain a substance C;
adding the inorganic black toner into the substance C, fully stirring and fusing, and cooling to room temperature to obtain a substance D;
and taking out the substance D, and shearing the substance D into black asphalt particles with the particle size of 2-4 mm by using asphalt particle granulation equipment to obtain the direct-throwing black asphalt particles for repairing the asphalt pavement.
In the method, preferably, the black asphalt particles and hot standard asphalt aggregates with the thickness of 0-20 mm and the temperature of 140-180 ℃ are mixed to prepare the black asphalt mixture which is directly used for repairing road surfaces.
In the above method, preferably, the black asphalt particles have a particle size of 2 to 4 mm.
According to the technical scheme, the direct-throwing asphalt particles for asphalt pavement repair provided by the invention solve the problems of inconvenient transportation and storage of the existing asphalt pavement cold-patch material. Compared with the prior art, the invention has the following beneficial effects:
firstly, the finished product of the direct-throwing asphalt particles for asphalt pavement repair provided by the invention is mechanically granulated into asphalt particles by asphalt particle granulation equipment, is clean and tidy, is easy to pack and package, and is convenient to transport and store for a long time.
Secondly, the direct-throwing asphalt particles for repairing the asphalt pavement do not contain large-particle aggregates, so that the possibility of mechanical granulation is realized, the weight of the product is greatly reduced, and the transportation cost is greatly reduced.
Thirdly, the direct-throwing asphalt particles for asphalt pavement repair provided by the invention are mixed with hot standard asphalt aggregates (with the particle size of 0-20 mm) which are heated to 140-180 ℃ in advance to prepare cold-patch materials meeting the requirements, and the cold-patch materials are transported to a repair site for direct feeding after being cooled to 40-100 ℃, so that the construction is rapid and convenient.
Fourth, the direct-throwing asphalt particles for asphalt pavement repair provided by the invention are added with the waste rubber powder, so that on one hand, SBS can be dispersed in asphalt more uniformly, the performances of low temperature ductility, high temperature rutting resistance, ageing resistance and the like of the asphalt are improved, on the other hand, waste materials are reasonably utilized, and the direct-throwing asphalt particles have higher economic and environmental benefits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flow chart of a preparation method of the direct vat asphalt particles provided by the invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The realization principle of the invention is as follows: substances prepared from aromatic hydrocarbon oil, an asphalt anti-aging agent, an SBS modifier, waste rubber powder, C5 petroleum resin, C9 petroleum resin and inorganic black toner are sheared into black asphalt particles with the particle size of 2-4 mm by asphalt particle granulation equipment, and the finished product is clean and convenient to transport and store. Can be mixed with hot standard asphalt aggregate on site, and is convenient to use.
The scheme provided by the invention solves the problems that the existing asphalt pavement cold patch material contains aggregate, is unfixed in shape and is inconvenient to transport and store.
Specifically, the direct-vat-set black asphalt particles for repairing the asphalt pavement are prepared from the following raw materials in parts by weight and obtained by mechanical granulation:
15-25 parts of aromatic hydrocarbon oil, 1-4 parts of asphalt anti-aging agent, 2-4 parts of SBS modifier, 3-10 parts of waste rubber powder, 25-40 parts of C5 petroleum resin, 20-35 parts of C9 petroleum resin and 5-15 parts of inorganic black toner.
Wherein the particle size of the waste rubber powder is 40-80 meshes, preferably 60 meshes.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
Examples 1 to 5.
The invention provides a direct-throwing black asphalt particle for asphalt pavement repair, which comprises the following specific examples.
| Raw materials | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Aromatic hydrocarbon oil | 15 | 18 | 22 | 20 | 25 |
| Asphalt anti-aging agent | 3 | 1 | 1.5 | 2.5 | 4 |
| SBS modifier | 3 | 2 | 3.5 | 2.5 | 4 |
| Waste rubber powder | 8 | 6 | 3 | 5 | 10 |
| C5 Petroleum resin | 40 | 30 | 40 | 35 | 25 |
| C9 Petroleum resin | 26 | 35 | 15 | 25 | 20 |
| Inorganic black toner | 5 | 8 | 15 | 10 | 12 |
Based on the raw materials of the direct-vat asphalt particles for asphalt pavement repair and the above several typical specific embodiments, the invention also provides a preparation method of the direct-vat asphalt particles, which specifically comprises the following steps:
step 110, pouring aromatic hydrocarbon oil and an asphalt anti-aging agent into a temperature-resistant container A in sequence, mixing, stirring uniformly at the temperature of 40-80 ℃, and then keeping the temperature for 1-2 hours to obtain a substance A;
step 120, mixing the SBS modifier and the waste rubber powder, adding the mixture into a container B, and uniformly stirring the mixture at normal temperature (room temperature) to obtain a substance B;
step 130, adding petroleum resin C5 and petroleum resin C9 into a temperature-resistant container A, uniformly mixing the petroleum resin C5 and the petroleum resin C9 with a substance A, then keeping the temperature at 50-65 ℃ for 1-2 hours, adding a substance B, and uniformly stirring to obtain a substance C;
step 140, adding the inorganic black toner into the temperature-resistant container A, fully stirring and fusing the inorganic black toner with the substance C, and cooling to room temperature to obtain a substance D;
and 150, taking out the substance D, and shearing the substance D into black asphalt particles with the particle size of 2-4 mm by using asphalt particle granulation equipment to obtain the direct-throwing black asphalt particles for repairing the asphalt pavement.
The direct-vat-set black asphalt particles obtained by the method of the present invention do not contain large-particle aggregates, and therefore, the method has the possibility of mechanical granulation. Therefore, the granulated asphalt particles are clean and tidy, are easy to pack and transport and store.
In addition, the direct-throwing black asphalt particles provided by the invention do not contain large-particle aggregates, so that the weight of the product is greatly reduced, and the transportation cost is greatly reduced.
The asphalt particles can not be adhered to each other, the caking phenomenon can not be generated, and the long-time storage is convenient.
The direct-vat-set black asphalt particles for repairing the asphalt pavement can be conveniently prepared into a direct-vat-set asphalt mixture for directly and quickly repairing the asphalt pavement. The specific method comprises the following steps:
adding the direct-vat-set black asphalt particles and hot standard asphalt aggregates (the particle size is 0-20 mm) which are heated to 140-180 ℃ into a container D, and stirring to prepare an asphalt mixture. And mixing the black asphalt particles and hot standard asphalt aggregates with the thickness of 0-20 mm, which are heated to 140-180 ℃ to prepare a black asphalt mixture, cooling to 40-100 ℃, and conveying to a repair site for direct feeding, so that the construction is rapid and convenient.
The direct-vat-set black asphalt particles and the direct-vat-set asphalt mixture provided by the invention have excellent performance indexes and meet the requirements of industrial standards.
(1) The performance index of 5 specific examples of the direct vat asphalt granules is as follows:
| detecting items | Unit of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Apparent density | Pa×s | 0.18 | 0.19 | 0.22 | 0.20 | 0.16 |
| Kinematic viscosity | mm2/s | 182 | 188 | 190 | 185 | 195 |
| Saybolt viscosity | s | 92 | 92 | 91 | 95 | 90 |
(2) The average performance index for the 5 specific examples is as follows:
| detecting items | Unit of | Technical requirements | Measured index | Test method |
| Apparent density | Pa×s | 0.17±0.05 | 0.19 | JTGE20、T0625 |
| Kinematic viscosity | mm2/s | 170±50 | 188 | JTGE20、T0619 |
| Saybolt viscosity | s | 85±20 | 92 | JTGE20、T0623 |
(3) The performance indexes of the direct-vat-set black asphalt particle mixture prepared by the 5 specific embodiments are as follows:
| detecting items | Unit of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Grade of adhesion | Stage | 5 | 5 | 5 | 5 | 5 |
| Penetration strength | kg/cm2 | 2.1 | 2.0 | 1.7 | 2.3 | 1.9 |
| Residual rate | ％ | 88 | 94 | 92 | 96 | 90 |
| Degree of stability | kN | 8.7 | 8.5 | 9 | 8.6 | 8.7 |
| Degree of residual stability | ％ | 91 | 95 | 93 | 88 | 98 |
(4) The average performance index of the direct vat asphalt particle mixture prepared by 5 specific examples is as follows:
with the above description of the specific embodiment, the direct vat asphalt particles for repairing asphalt pavement and the preparation method thereof provided by the invention are applied to maintenance and repair of asphalt pavement, especially have good filling and repairing effects on cracks and pits appearing on asphalt pavement, and compared with the traditional cold patching material, the black asphalt particle material has better performance, and compared with the prior art, the direct vat asphalt particles have the following advantages:
firstly, the material is easy to collect, and the construction is convenient and fast. Particularly, the waste rubber powder is added, so that SBS can be dispersed in the asphalt more uniformly, the performances of the asphalt such as low-temperature ductility, high-temperature rutting resistance and ageing resistance are improved, the waste materials are reasonably utilized, the energy is saved, the environment is protected, and the economic and environmental benefits are higher.
Secondly, after the asphalt pavement is repaired, the cooling time is short, the forming is rapid, the pavement can be put into use in a short time, the time cost is saved, and the traffic pressure is relieved.
And thirdly, the high-low temperature performance is good, the low-temperature cracking damage is small, the rutting performance is good, and the performance index of the rutting agent is not lower than the index of the original pavement and is even higher than the design index of the original pavement.
Fourthly, the waste rubber powder is added, so that the adhesive has excellent cementing property, the repaired and maintained place is better attached to the original pavement, and new diseases such as falling, stripping and the like do not occur.
Fifthly, the manufacturing process is more environment-friendly, no new pollution is caused to the environment, and the particle type mode can also greatly reduce the construction cost in the construction process.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (10)
1. The direct-throwing asphalt particles for repairing the asphalt pavement are characterized by being prepared from the following raw materials in parts by weight and obtained by mechanical granulation:
15-25 parts of aromatic hydrocarbon oil, 1-4 parts of asphalt anti-aging agent, 2-4 parts of SBS modifier, 3-10 parts of waste rubber powder, 25-40 parts of C5 petroleum resin and 20-35 parts of C9 petroleum resin.
2. The direct vat asphalt particles for asphalt pavement patching according to claim 1, wherein 5 to 15 parts of inorganic black toner is further added to the raw materials.
3. The direct-vat-set asphalt granule for asphalt pavement patching according to claim 2, characterized in that the weight parts of the raw materials are as follows:
15 parts of aromatic hydrocarbon oil, 3 parts of asphalt anti-aging agent, 3 parts of SBS modifier, 8 parts of waste rubber powder, 40 parts of C5 petroleum resin, 26 parts of C9 petroleum resin and 5 parts of inorganic black toner.
4. The direct-vat-set asphalt granule for asphalt pavement patching according to claim 2, characterized in that the weight parts of the raw materials are as follows:
18 parts of aromatic hydrocarbon oil, 1 part of asphalt anti-aging agent, 2 parts of SBS modifier, 6 parts of waste rubber powder, 30 parts of C5 petroleum resin, 35 parts of C9 petroleum resin and 8 parts of inorganic black toner.
5. The direct-vat-set asphalt granule for asphalt pavement patching according to claim 2, characterized in that the weight parts of the raw materials are as follows:
22 parts of aromatic hydrocarbon oil, 1.5 parts of asphalt anti-aging agent, 3.5 parts of SBS modifier, 3 parts of waste rubber powder, 40 parts of C5 petroleum resin, 15 parts of C9 petroleum resin and 15 parts of inorganic black toner.
6. The direct-vat-set asphalt granule for asphalt pavement patching according to claim 2, characterized in that the weight parts of the raw materials are as follows:
20 parts of aromatic hydrocarbon oil, 2.5 parts of asphalt anti-aging agent, 2.5 parts of SBS modifier, 5 parts of waste rubber powder, 35 parts of C5 petroleum resin, 25 parts of C9 petroleum resin and 10 parts of inorganic black toner.
7. The direct-vat-set asphalt granule for asphalt pavement patching according to claim 2, characterized in that the weight parts of the raw materials are as follows:
25 parts of aromatic hydrocarbon oil, 4 parts of asphalt anti-aging agent, 4 parts of SBS modifier, 10 parts of waste rubber powder, 25 parts of C5 petroleum resin, 20 parts of C9 petroleum resin and 12 parts of inorganic black toner.
8. A method for preparing the direct vat asphalt particles for asphalt pavement patching according to claim 1, comprising the steps of:
mixing aromatic hydrocarbon oil and an asphalt anti-aging agent, uniformly stirring at the temperature of 40-80 ℃, and keeping the temperature for 1-2 hours to obtain a substance A;
mixing and stirring the SBS modifier and the waste rubber powder uniformly to obtain a substance B;
adding petroleum resin C5 and petroleum resin C9 into the substance A, uniformly mixing, keeping the temperature at 50-65 ℃ for 1-2 hours, adding the substance B, and uniformly stirring to obtain a substance C;
adding the inorganic black toner into the substance C, fully stirring and fusing, and cooling to room temperature to obtain a substance D;
and taking out the substance D, and shearing the substance D into black asphalt particles with the particle size of 2-4 mm by using asphalt particle granulation equipment to obtain the direct-throwing black asphalt particles for repairing the asphalt pavement.
9. The method according to claim 8, wherein the black asphalt particles and hot standard asphalt aggregates with the thickness of 0-20 mm and the temperature of 140-180 ℃ are mixed to prepare the black asphalt mixture which is directly used for repairing road pavements.
10. The method according to claim 8, wherein the black pitch particles have a particle size of 2 to 4 mm.
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| CN113122299A (en) * | 2021-06-18 | 2021-07-16 | 山东鹤鹏技术有限公司 | Processing method of petroleum asphalt |
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| CN113122299A (en) * | 2021-06-18 | 2021-07-16 | 山东鹤鹏技术有限公司 | Processing method of petroleum asphalt |
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