CN111808433A - High-temperature-resistant modified asphalt pavement repairing material and preparation method thereof - Google Patents
High-temperature-resistant modified asphalt pavement repairing material and preparation method thereof Download PDFInfo
- Publication number
- CN111808433A CN111808433A CN202010635775.1A CN202010635775A CN111808433A CN 111808433 A CN111808433 A CN 111808433A CN 202010635775 A CN202010635775 A CN 202010635775A CN 111808433 A CN111808433 A CN 111808433A
- Authority
- CN
- China
- Prior art keywords
- temperature
- parts
- modified asphalt
- asphalt pavement
- resistant modified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a high-temperature-resistant modified asphalt pavement repairing material and a preparation method thereof, wherein the high-temperature-resistant modified asphalt pavement repairing material is prepared from the following substances in parts by mass: 76-96 parts of matrix asphalt, 15-20 parts of grafted SBS modifier, 1-5 parts of polyphosphoric acid, 4-9 parts of tackifier, 3-6 parts of stabilizer and 4-6 parts of anti-aging agent, wherein the grafted SBS modifier is prepared by SBS and coupling agent through coupling reaction. The preparation method comprises the following steps: firstly, solid matrix asphalt is sintered into a liquid state, then the liquid matrix asphalt, the grafted SBS modifier and polyphosphoric acid are weighed according to the mass parts and mixed in a modification system, the stirring speed is 800-1000 r/min, the time is 15min, and the temperature is 180 ℃; then, the stirring speed of the modification system is increased to 1500-2000 r/min, and simultaneously the tackifier, the stabilizer and the anti-aging agent are added; and finally, the temperature of the modification system is increased to 240 ℃, and the modified asphalt pavement repairing material is stirred and developed for 2 hours, so that the modified asphalt pavement repairing material is prepared, and has high temperature resistance and long service life.
Description
Technical Field
The invention relates to the field of asphalt materials, in particular to a high-temperature-resistant modified asphalt pavement repairing material and a preparation method thereof.
Background
Asphalt roads are one of the important types of high-grade highways in China and even countries in the world at present, and are widely developed due to the advantages of smooth road surfaces, no seams, small vibration, low noise, high driving efficiency, convenient maintenance and the like, but the asphalt roads have the defects that the speed and the quality of vehicles passing in the traveling process of people are influenced and even the traffic safety of people is seriously influenced due to the fact that the asphalt road surfaces are damaged to a certain extent due to the insufficient performance of materials under the natural environmental conditions of light, heat and the like. To minimize traffic problems, these damaged asphalt pavements must be repaired in a timely and efficient manner. In addition, the road maintenance work in these areas is also very difficult, the repair frequency and maintenance cost of the road are rising year by year, maintenance needs a long time after each maintenance, and means such as isolation need to be arranged in the maintenance process, so that the road traffic is inevitably blocked, and great inconvenience is brought to the trip of people. In the actual cases of numerous damaged asphalt roads, asphalt roads in high-temperature areas are one of the most common conditions, and asphalt road pavements which bear high-temperature environments all year round can be repeatedly damaged even in a short time, because asphalt is used as a viscoelastic material, the performance of the asphalt is converted from an elastomer to a plastomer in the high-temperature environment, the stiffness modulus is greatly reduced, the deformation resistance is sharply reduced, and the asphalt is repeatedly rolled under the load of a vehicle, so that the permanent deformation of the pavement is easily caused. The existing asphalt road pavement repair material in high-temperature areas has a plurality of defects, mainly comprising the following components: (1) the repair and maintenance cost is high due to the fact that the formula design of the repair material is not scientific enough. (2) The repair material has insufficient high temperature resistance and other road performances, and cannot be suitable for frequent secondary damage caused by the current environmental pressure, thereby wasting materials and cost. (3) The preparation process of the repair material is complex, and the requirements on preparation conditions and equipment are high. Therefore, it is urgent to develop a modified asphalt pavement repair material with high temperature resistance suitable for repairing asphalt pavement in tropical zone with high temperature.
In the current research of polymer modified asphalt, the application of SBS modified asphalt is the most extensive one, and because of the excellent road performance, especially the high temperature resistance, the SBS modified asphalt is also greatly popularized and developed in China, but still has some defects: for a high-temperature area throughout the year, the modified asphalt pavement repair material needs to have extraordinary high-temperature performance, so the requirement on the softening point of the asphalt material needs to be higher, if a traditional SBS modifier is adopted, a higher mixing amount is generally needed, and the problems of overlarge viscosity and storage stability are caused on the one hand; on the other hand, industrial costs rapidly rise. Second, because the SBS and the matrix asphalt have large difference in parameters such as molecular weight, density, solubility and other physical and chemical properties, the compatibility of SBS and the matrix asphalt is poor, and the segregation and layering phenomena of SBS modified asphalt are easily caused, so that the modification effect, the construction quality and the pavement performance of the modified asphalt pavement repair material are influenced. In conventional studies, it has been common to add a compatibilizer containing an aromatic component, such as an aromatic oil or a furfural extract oil, but the compatibilizer has not a significant effect and also has a certain toxicity.
At present, as published in Chinese patent document, application publication No. CN105647207A, 2016, 6, 8, the invention discloses a high temperature resistant SBS modified asphalt and a preparation method thereof, wherein linear SBS is used as a modifier, compatibility of SBS and asphalt is increased through furfural extract oil, and a special stabilizer for the modified asphalt is mixed and stirred, so that the softening point of the prepared modified asphalt is more than 73 ℃. The linear SBS modifier is adopted to modify the asphalt, the softening point of the modified asphalt is improved, but the requirement of a high-temperature area on the high-temperature performance of the asphalt road pavement can not be met.
For example, the application publication No. CN103232714A published in chinese patent document, application publication date 2013, 8.7, the application name of the invention is "a high softening point SBS modified asphalt", which adopts matrix asphalt obtained by blending oil sand and crude oil of middle sea oil, and the modified asphalt prepared by using the oil sand as a raw material has a relatively high softening point, but no compatibilizer is added, so that the compatibility of the modifier and the matrix asphalt is not good, the viscosity at 135 ℃ is too high, which is as high as 1900Pa · s, the requirement on equipment in the preparation process of the modified asphalt is high, the energy consumption is high, the cost is high, and the oil sand is not widely used in the field of modified asphalt and has low applicability.
For another example, as published in chinese patent document, application publication No. CN102719107A, published in 2012, 10 months and 10 days, the invention provides a method for preparing a high performance SBS modified emulsified asphalt machine, which comprises mixing 56-67 wt% of base asphalt, 1.2-2.5 wt% of SBS, 0.5-1.5 wt% of EVA wax, 0.2-2.5 wt% of a cationic emulsifier, 0-0.2 wt% of a thickener, and 30-42 wt% of water, and modifying the mixture to obtain modified asphalt having good high temperature performance, softening point of more than 76 ℃, viscosity at 60 ℃ of the modified asphalt being improved, and viscosity at 135 ℃ being reduced, but the cost in the preparation process being high.
The invention also discloses an application publication No. CN109054414A published in Chinese patent literature, application publication No. 2018, 12 and 21, the name of the invention is 'a high-temperature-resistant road damping modified asphalt and a manufacturing method thereof', the high-temperature-resistant road damping modified asphalt is prepared by mixing and modifying matrix asphalt, a linear SBS modifier, an EVA modifier, a compatilizer, a damping additive and a stabilizer in a certain proportion, the prepared modified asphalt has good high-temperature resistance and shock resistance, the softening point can reach 88 ℃, but the system viscosity is too high due to too high addition of the SBS modifier, the energy consumption is larger, and the requirement on preparation equipment is also higher.
Therefore, the modified asphalt pavement repair materials in the tropical regions with high temperature all year round in the current research cannot meet the requirements of the current environment on asphalt pavement, and only the modified asphalt pavement repair materials with more excellent high temperature resistance are the most urgent needs in the current market.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a high-temperature-resistant modified asphalt pavement repairing material and a preparation method thereof, so that the technical problems that the existing similar asphalt pavement repairing material is complicated to prepare, high in cost, poor in high-temperature resistance and difficult to adapt to perennial high-temperature tropical areas are solved. The purpose is realized by the following technical scheme.
The high-temperature-resistant modified asphalt pavement repair material is characterized by being prepared from the following substances in parts by mass: 76-96 parts of matrix asphalt, 15-20 parts of grafted SBS modifier, 1-5 parts of polyphosphoric acid, 4-9 parts of tackifier, 3-6 parts of stabilizer and 4-6 parts of anti-aging agent, wherein the grafted SBS modifier is prepared by SBS and coupling agent through coupling reaction. The grafted SBS modifier is prepared by premixing SBS and coupling agent and performing coupling reaction, compared with the existing SBS, the softening point of the grafted SBS modifier can reach 95 ℃, the effect of the grafted SBS modifier is more obvious than that of the existing SBS modifier, and therefore the high-temperature performance, the mechanical performance and the wear resistance of the asphalt road repairing material are greatly improved. By adding polyphosphoric acid (PPA), the PPA has good compatibility with the matrix asphalt, can effectively promote the swelling reaction of SBS and the matrix asphalt, so that SBS is dispersed into fine particles, and is beneficial to the penetration of light components in the asphalt in the SBS molecular structure, thereby efficiently promoting the compatibility of SBS and the matrix asphalt. And the PPA also has better high-temperature resistance, and the high-temperature resistance of the modified asphalt pavement repair material can be further improved by adding the PPA.
The matrix asphalt is 50# to 90# road asphalt for removing moisture and impurities.
The grafted SBS modifier is prepared by mixing SBS and a coupling agent in a proportion of 50:1, wherein SBS is block copolymer of styrene and butadiene, and coupling agent is KH-560.
In the polyphosphoric acid, the content of phosphoric acid is 15%, the content of phosphorus pentoxide is not less than 84%, the content of chloride is not more than 0.001%, the content of sulfate is not more than 0.05%, the content of heavy metal is not more than 0.01%, and the content of iron is not more than 0.001%. The polyphosphoric acid (PPA) can greatly improve the compatilizer of the SBS modifier and the matrix asphalt, and has more remarkable effect than the traditional compatilizer.
The tackifier is methyl cellulose.
The stabilizer is polyvinyl alcohol.
The anti-aging agent is UV-531.
The preparation method of the high-temperature-resistant modified asphalt pavement repairing material comprises the following preparation steps:
(1) melting: burning the solid matrix asphalt into a liquid state;
(2) premixing: weighing liquid matrix asphalt, a grafted SBS modifier and polyphosphoric acid according to the mass parts, mixing the liquid matrix asphalt, the grafted SBS modifier and the polyphosphoric acid in a modification system, and stirring and premixing to obtain a premixed material, wherein the stirring speed is set to be 800-1000 r/min, the stirring time is 15min, and the temperature of the modification system is 180 ℃;
(3) shearing: improving the stirring speed of the modification system to 1500-2000 r/min, and simultaneously adding a tackifier, a stabilizer and an anti-aging agent to obtain a mixture;
(4) and (3) development: and (3) raising the temperature of the modification system to 240 ℃, and stirring and developing for 2 hours to obtain the high-temperature-resistant modified asphalt pavement repairing material.
The invention has the following beneficial effects:
1. compared with the traditional modifier SBS, the high-temperature-resistant modified asphalt pavement repairing material has the advantages that the softening point is higher under the condition of less mixing amount, the softening point can reach 95 ℃, and the high-temperature-resistant modified asphalt pavement repairing material is particularly suitable for tropical areas with high temperature all year round.
2. The invention can effectively enhance the graft copolymerization reaction of SBS and the matrix asphalt by adding polyphosphoric acid (PPA), thereby improving the compatibility of SBS and the matrix asphalt, having better compatibilization effect than the traditional compatilizer, and being capable of completely replacing the traditional compatilizer.
3. The invention adds UV-531 as an anti-aging agent, effectively improves the strong ultraviolet resistance of asphalt road pavements in tropical areas with high temperature all the year around, and prolongs the service life of asphalt roads.
4. The manufacturing method has the advantages of simple process, low cost, low energy consumption, low requirement on manufacturing equipment, capability of reducing the energy consumption to a greater extent and suitability for field practical application of a certain scale.
5. The experimental research result of the invention shows that the product completely meets the minimum technical requirements of three performance indexes of polymer modified asphalt in tropical regions with high temperature all year round, and comprises the following steps: the penetration degree (25 ℃, 60 g and 5 s) is 2.0-3.0 mm, the softening point (DEG C) is more than or equal to 85, and the ductility (5 ℃, 5 cm/min)/cm is more than or equal to 20, so the product is suitable for repairing the asphalt pavement in the tropical zone with high temperature all year round.
Drawings
FIG. 1 is a scanning electron micrograph of a sample prepared according to example 1 of the present invention.
FIG. 2 is a scanning electron micrograph of a sample prepared according to example 2 of the present invention.
FIG. 3 is a scanning electron micrograph of a sample prepared according to example 3 of the present invention.
FIG. 4 is a scanning electron micrograph of a sample prepared according to example 4 of the present invention.
FIG. 5 is a scanning electron micrograph of a sample prepared according to example 5 of the present invention.
FIG. 6 is a scanning electron micrograph of a sample prepared according to comparative example 1 of the present invention.
FIG. 7 is a thermogravimetric-differential scanning calorimetry trace of a sample prepared in comparative example 1 of the present invention.
FIG. 8 is a graph showing infrared analysis of a sample prepared in comparative example 1 of the present invention.
FIG. 9 is a thermogravimetric-differential scanning calorimetry trace of a sample prepared in example 1 of the present invention.
FIG. 10 is a graph of an infrared analysis of a sample prepared in example 1 of the present invention.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings 1-10 in accordance with specific embodiments.
The first embodiment is as follows:
the high-temperature-resistant modified asphalt pavement repairing material comprises the following substances in parts by mass: 85 parts of matrix asphalt, 19 parts of a grafted SBS modifier, 3 Parts of Polyphosphoric Acid (PPA), 6 parts of a tackifier (methyl cellulose), 4 parts of a stabilizer (polyvinyl alcohol) and 5 parts of an anti-aging agent (UV-531). Wherein the grafted SBS modifier is prepared by mixing YH-801 type SBS (namely styrene and butadiene block copolymer) with a coupling agent in advance according to a proportion and performing coupling reaction, wherein the coupling agent is KH-560, and the mixing proportion adopts SBS: KH-560=50:1, as in the grafted SBS modifier in the following examples.
The preparation method of the high-temperature-resistant modified asphalt pavement repairing material comprises the following steps: the preparation process comprises melting, premixing, shearing and developing; the solid matrix asphalt is burned into liquid state by liquefied petroleum gas during melting process so as to be weighed conveniently. In the premixing process, the liquid matrix asphalt, the grafted SBS modifier and the polyphosphoric acid are weighed in parts by mass, mixed and stirred, wherein the stirring speed is 800-1000 r/min, the stirring time is 15min, and the temperature of a modification system is 180 ℃. After methyl cellulose, polyvinyl alcohol and UV-531 are added in the shearing process to obtain a mixture, the stirring speed of a modification system needs to be increased to 1500-2000 r/min, and the mixture is fully and uniformly mixed. And in the final development process, the temperature of the modification system is further increased to 240 ℃, and the modification system is developed for 2 hours at constant temperature and constant stirring speed, so that the high-temperature-resistant modified asphalt pavement repairing material is obtained.
Example two:
the high-temperature-resistant modified asphalt pavement repairing material comprises the following substances in parts by mass: 81 parts of matrix asphalt, 19 parts of grafted SBS modifier, 2 Parts of Polyphosphoric Acid (PPA), 8 parts of tackifier (methyl cellulose), 5 parts of stabilizer (polyvinyl alcohol) and 6 parts of anti-aging agent (UV-531).
The preparation method of the high-temperature-resistant modified asphalt pavement repairing material comprises the following steps: the modified asphalt pavement repair material can be prepared through 4 processes as in the first embodiment; the solid matrix asphalt is burned into liquid state by liquefied petroleum gas in the melting process and is reasonably stored for weighing. In order to enable PPA to better promote the compatibility of SBS and the matrix asphalt, a premixing stage is required, the liquid matrix asphalt, the grafted SBS modifier and the polyphosphoric acid are weighed according to the mass parts, mixed and stirred, and the mixture is primarily and uniformly mixed under a modification system with the stirring speed of 800-1000 r/min, the stirring time of 15min and the temperature of 180 ℃. And then, adding methyl cellulose, polyvinyl alcohol and UV-531 into the modification system, and increasing the stirring speed to 1500-2000 r/min to reach a shearing stage. And finally, raising the temperature of the modification system to 220 ℃, and culturing for 2h as a development stage process to obtain the high-temperature-resistant modified asphalt pavement repairing material.
Example three:
the high-temperature-resistant modified asphalt pavement repairing material comprises the following substances in parts by mass: 79 parts of matrix asphalt, 16 parts of grafted SBS modifier, 2 parts of polyphosphoric acid, 7 parts of tackifier (methyl cellulose), 4 parts of stabilizer (polyvinyl alcohol) and 4 parts of anti-aging agent (UV-531).
The preparation method of the high-temperature-resistant modified asphalt pavement repairing material comprises the following steps: weighing and adding the base asphalt which is burnt into liquid state into a modification system according to the required parts; preliminarily mixing the matrix asphalt, the grafted SBS modifier and polyphosphoric acid, and stirring at the speed of 800-1000 r/min for 15min and at the temperature of 180 ℃ under mechanical stirring to ensure that the compatibility of SBS and the matrix asphalt is good; then adding methyl cellulose, polyvinyl alcohol and UV-531 into the modification system, and increasing the stirring speed to 1500-2000 r/min to uniformly disperse various substances; finally, the temperature of the modification system is required to be raised to 240 ℃ in the development stage of 1.5h, and the high-temperature-resistant modified asphalt pavement repairing material is obtained.
Example four:
the high-temperature-resistant modified asphalt pavement repairing material comprises the following substances in parts by mass: 91 parts of matrix asphalt, 15 parts of a grafted SBS modifier, 4 parts of polyphosphoric acid, 9 parts of a tackifier (methyl cellulose), 6 parts of a stabilizer (polyvinyl alcohol) and 6 parts of an anti-aging agent (UV-531).
The preparation method of the high-temperature-resistant modified asphalt pavement repairing material comprises the following steps: 1. melting: the solid matrix asphalt is burnt into liquid state by liquefied petroleum gas; 2. premixing: weighing liquid matrix asphalt, a grafted SBS modifier and polyphosphoric acid according to the mass parts, mixing the liquid matrix asphalt, the grafted SBS modifier and the polyphosphoric acid in a modification system, and stirring and premixing to obtain a premixed material, wherein the stirring speed is set to be 800-1000 r/min, the stirring time is 15min, and the temperature of the modification system is 180 ℃; 3. shearing: improving the stirring speed of the modification system to 1500-2000 r/min, and simultaneously adding methyl cellulose, polyvinyl alcohol and UV-531 to obtain a mixture; 4. and (3) development: the temperature of the modification system is increased to 200 ℃, and the modification system is stirred and developed for 2 hours. Thus obtaining the high-temperature resistant modified asphalt pavement repairing material.
Example five:
the high-temperature-resistant modified asphalt pavement repairing material comprises the following substances in parts by mass: 86 parts of matrix asphalt, 14 parts of a grafted SBS modifier, 5 parts of polyphosphoric acid, 8 parts of a tackifier (methyl cellulose), 4 parts of a stabilizer (polyvinyl alcohol) and 6 parts of an anti-aging agent (UV-531).
The preparation method of the high-temperature-resistant modified asphalt pavement repairing material comprises the following steps: the liquid matrix asphalt which is burnt by using liquefied petroleum gas is weighed according to the requirement and is placed in a modification system; firstly, adding a grafted SBS modifier and polyphosphoric acid, and performing full swelling reaction at the stirring speed of 800-1000 r/min, the stirring time of 15min and the temperature of 180 ℃; then adding methyl cellulose, polyvinyl alcohol and UV-531, and simultaneously increasing the stirring speed of the modification system to 1500-2000 r/min; and finally, increasing the stirring temperature of the modification system to 220 ℃, and maintaining the stirring speed and the stirring temperature for 2h to obtain the high-temperature-resistant modified asphalt pavement repairing material.
The samples obtained in the first to fifth examples were tested for their softening point by using a STLL-7 type softening point tester, their penetration at 25 ℃ by using a STLZ-5 type penetrometer and their ductility at 5 ℃ by using a STYD-7 type ductility tester, and the results are shown in the following tables:
| sample numbering | Example one | Example two | EXAMPLE III | Example four | ExamplesFive of them |
| Softening Point (. degree. C.) | 95.3 | 93.2 | 94.3 | 91.8 | 94.0 |
| Penetration (mm) at 25 DEG C | 2.1 | 2.7 | 2.4 | 2.6 | 2.5 |
| 5 ℃ ductility (cm) | 25.3 | 20.7 | 21.3 | 22.5 | 23.4 |
The samples prepared in examples one to five and comparative example one were subjected to scanning electron microscope tests using a scanning electron microscope model ZEISSUPERA 40, produced by Zeiss, Germany, to observe the microstructure of the matrix asphalt pavement repair material and the modified asphalt pavement repair material. The asphalt sample has poor conductivity, and needs to be sprayed with gold and observed on a sticky conductive adhesive before observation. Thermogravimetry-differential scanning calorimetry analysis and infrared analysis are carried out on the samples prepared in the first example and the first comparative example, and the thermal stability and the change condition of functional groups are analyzed to analyze whether chemical changes occur.
FIG. 6 is an SEM image of a base asphalt modified without the addition of a modifier, so that the surface is very flat; FIGS. 1 to 5 are SEM images of samples modified with a modifier, the surface modifier being dispersedIs relatively uniform, which indicates that the compatibility is relatively good; FIG. 7 is a thermogravimetric-differential scanning calorimetry diagram of the base asphalt modified without the addition of the modifier, and FIG. 8 is an infrared analysis diagram of the base asphalt modified without the addition of the modifier; fig. 9 is a thermogravimetric-differential scanning calorimetry diagram of a sample modified by adding a modifier, and comparing fig. 7 with fig. 9, it can be found that the area of the heat absorption peak of the DSC image between 550 ℃ and 700 ℃ is obviously much smaller than that of the matrix asphalt sample, and the whole curve is much gentler than that of the former, which also indicates that the thermal stability of the pavement repair material modified by adding a modifier is greatly improved; FIG. 10 is an infrared analysis of a sample modified with the addition of a modifying agent, comparing FIG. 8 with FIG. 10, FIG. 10 at 961cm-1And 697cm-1Two parts also have strong new absorption peaks of 961cm-1Is RCH ═ CH2Bending vibration peak of middle C-H bond, 697cm-1The bending vibration peak of the single substituted C-H bond of PS segment benzene ring in YH-801 SBS is the characteristic absorption peak of YH-801 SBS, and compared with the infrared spectrogram of the matrix asphalt, the method can be judged that the method has no chemical change in the modification process and basically takes physical mixing as the main part.
The above description is only an implementation way of the present invention, and not a limitation to the technical scope of the present invention, and all obvious modifications or substitutions made by the contents of the present invention or other related technical fields can be directly or indirectly applied, and the same principle is included in the scope of the present invention.
Claims (8)
1. The high-temperature-resistant modified asphalt pavement repair material is characterized by being prepared from the following substances in parts by mass: 76-96 parts of matrix asphalt, 15-20 parts of grafted SBS modifier, 1-5 parts of polyphosphoric acid, 4-9 parts of tackifier, 3-6 parts of stabilizer and 4-6 parts of anti-aging agent, wherein the grafted SBS modifier is prepared by SBS and coupling agent through coupling reaction.
2. The high-temperature-resistant modified asphalt pavement repair material as claimed in claim 1, wherein the base asphalt is 50# to 90# road asphalt with water and impurities removed.
3. The high temperature resistant modified asphalt pavement repair material of claim 1, wherein the grafted SBS modifier is a mixture of SBS and coupling agent in a ratio of 50:1, wherein SBS is block copolymer of styrene and butadiene, and coupling agent is KH-560.
4. The high-temperature-resistant modified asphalt pavement restoration material as recited in claim 1, wherein the polyphosphoric acid contains 15% of phosphoric acid, 84% or more of phosphorus pentoxide, 0.001% or less of chloride, 0.05% or less of sulfate, 0.01% or less of heavy metal, and 0.001% or less of iron.
5. The high-temperature-resistant modified asphalt pavement repair material according to claim 1, characterized in that the tackifier is methyl cellulose.
6. The high-temperature-resistant modified asphalt pavement restoration material as recited in claim 1, wherein the stabilizer is polyvinyl alcohol.
7. The high-temperature-resistant modified asphalt pavement repair material as claimed in claim 1, wherein the anti-aging agent is UV-531.
8. The preparation method of the high-temperature-resistant modified asphalt pavement restoration material as claimed in claim 1, characterized by comprising the following preparation steps:
(1) melting: burning the solid matrix asphalt into a liquid state;
(2) premixing: weighing liquid matrix asphalt, a grafted SBS modifier and polyphosphoric acid according to the mass parts, mixing the liquid matrix asphalt, the grafted SBS modifier and the polyphosphoric acid in a modification system, and stirring and premixing to obtain a premixed material, wherein the stirring speed is set to be 800-1000 r/min, the stirring time is 15min, and the temperature of the modification system is 180 ℃;
(3) shearing: improving the stirring speed of the modification system to 1500-2000 r/min, and simultaneously adding a tackifier, a stabilizer and an anti-aging agent to obtain a mixture;
(4) and (3) development: and (3) raising the temperature of the modification system to 240 ℃, and stirring and developing for 2 hours to obtain the high-temperature-resistant modified asphalt pavement repairing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010635775.1A CN111808433A (en) | 2020-07-03 | 2020-07-03 | High-temperature-resistant modified asphalt pavement repairing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010635775.1A CN111808433A (en) | 2020-07-03 | 2020-07-03 | High-temperature-resistant modified asphalt pavement repairing material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111808433A true CN111808433A (en) | 2020-10-23 |
Family
ID=72856249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010635775.1A Pending CN111808433A (en) | 2020-07-03 | 2020-07-03 | High-temperature-resistant modified asphalt pavement repairing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111808433A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265155A (en) * | 2021-05-29 | 2021-08-17 | 山东鑫中和新材料科技有限公司 | Asphalt tackifier and preparation method thereof |
| CN114015246A (en) * | 2021-10-25 | 2022-02-08 | 河北交规院瑞志交通技术咨询有限公司 | Modified asphalt composite particle and preparation thereof, modified asphalt and application thereof |
| CN114479498A (en) * | 2022-02-28 | 2022-05-13 | 广深珠高速公路有限公司 | Novel modified asphalt and manufacturing method thereof |
| CN114656793A (en) * | 2022-02-28 | 2022-06-24 | 甘肃省交通科学研究院集团有限公司 | PPA (polyphthalamide) -based compounded high-toughness SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1969011A (en) * | 2004-06-18 | 2007-05-23 | Jsr克莱顿·伊利斯特摩股份有限公司 | Block copolymer composition for asphalt modification, process for producing the same, and asphalt composition |
| CN102391424A (en) * | 2011-09-01 | 2012-03-28 | 上海交通大学 | Method for modifying styrene-butadiene-styrene (SBS) block copolymer |
| CN103305014A (en) * | 2013-05-06 | 2013-09-18 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | SBS (stimulated brillouin scattering) modified asphalt and preparation method thereof |
| CN105273661A (en) * | 2014-07-12 | 2016-01-27 | 卢桂才 | Reactive composite waterproof sealant containing epoxyalkyl bridging agent and preparation method thereof |
| CN107641328A (en) * | 2017-10-22 | 2018-01-30 | 长沙秋点兵信息科技有限公司 | A kind of asphalt modifier, asphalt and preparation method thereof |
| CN110218463A (en) * | 2019-07-16 | 2019-09-10 | 黄河三角洲京博化工研究院有限公司 | A kind of modified pitch and preparation method thereof |
| CN112745691A (en) * | 2019-10-30 | 2021-05-04 | 中国石油化工股份有限公司 | Modified asphalt with stable thermal storage prepared from two end group polarized SBS |
-
2020
- 2020-07-03 CN CN202010635775.1A patent/CN111808433A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1969011A (en) * | 2004-06-18 | 2007-05-23 | Jsr克莱顿·伊利斯特摩股份有限公司 | Block copolymer composition for asphalt modification, process for producing the same, and asphalt composition |
| CN102391424A (en) * | 2011-09-01 | 2012-03-28 | 上海交通大学 | Method for modifying styrene-butadiene-styrene (SBS) block copolymer |
| CN103305014A (en) * | 2013-05-06 | 2013-09-18 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | SBS (stimulated brillouin scattering) modified asphalt and preparation method thereof |
| CN105273661A (en) * | 2014-07-12 | 2016-01-27 | 卢桂才 | Reactive composite waterproof sealant containing epoxyalkyl bridging agent and preparation method thereof |
| CN107641328A (en) * | 2017-10-22 | 2018-01-30 | 长沙秋点兵信息科技有限公司 | A kind of asphalt modifier, asphalt and preparation method thereof |
| CN110218463A (en) * | 2019-07-16 | 2019-09-10 | 黄河三角洲京博化工研究院有限公司 | A kind of modified pitch and preparation method thereof |
| CN112745691A (en) * | 2019-10-30 | 2021-05-04 | 中国石油化工股份有限公司 | Modified asphalt with stable thermal storage prepared from two end group polarized SBS |
Non-Patent Citations (2)
| Title |
|---|
| 刘静等: ""乙烯基三甲氧基硅烷接枝SBS性能的研究"", 《中国胶粘剂》 * |
| 贾淑明等主编: "《土木工程材料》", 28 February 2019, 西安电子科技大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265155A (en) * | 2021-05-29 | 2021-08-17 | 山东鑫中和新材料科技有限公司 | Asphalt tackifier and preparation method thereof |
| CN114015246A (en) * | 2021-10-25 | 2022-02-08 | 河北交规院瑞志交通技术咨询有限公司 | Modified asphalt composite particle and preparation thereof, modified asphalt and application thereof |
| CN114479498A (en) * | 2022-02-28 | 2022-05-13 | 广深珠高速公路有限公司 | Novel modified asphalt and manufacturing method thereof |
| CN114656793A (en) * | 2022-02-28 | 2022-06-24 | 甘肃省交通科学研究院集团有限公司 | PPA (polyphthalamide) -based compounded high-toughness SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111808433A (en) | High-temperature-resistant modified asphalt pavement repairing material and preparation method thereof | |
| Lei et al. | Evaluation of the effect of bio-oil on the high-temperature performance of rubber modified asphalt | |
| Lewandowski | Polymer modification of paving asphalt binders | |
| CN101235172B (en) | Asphalt pavement rubber plastic composite anti-rut agent and preparation method thereof | |
| CN112125575B (en) | High-efficiency regenerated asphalt mixture and preparation process thereof | |
| CN107698199B (en) | High-modulus asphalt mixture based on old pavement milling material and preparation method thereof | |
| Seidel et al. | Soy fatty acids as sustainable modifier for asphalt binders | |
| CN111944321A (en) | High-toughness semi-fusion functional composite environment-friendly asphalt interface regenerant and preparation method thereof | |
| CN105368072B (en) | A kind of bitumen regenerant and preparation method produced with waste lubricating oil | |
| CN109534722A (en) | A kind of high-performance reclaimed bituminous pavement cold-repairing material and preparation method thereof | |
| CN104672928B (en) | Low-viscosity regenerant for thermal regeneration of asphalt pavement, preparation method of low-viscosity regenerant and asphalt pavement thermal-regeneration mixture containing low-viscosity regenerant | |
| CN108587202A (en) | A kind of bottom of tower oil rubber modified bitumen and preparation method thereof | |
| CN110054905A (en) | Environment-friendly type pitch warm mix regenerative agent and environment-friendly type warm mix asphalt pavement regeneration mixture | |
| CN103788667A (en) | Multicomponent system for improving modulus of asphalt mixture, and application method and modified asphalt thereof | |
| CN114716839A (en) | Modified asphalt for heavy-duty pavement, modified asphalt mixture and preparation method thereof | |
| CN112430010A (en) | Desulfurized reclaimed rubber reclaimed asphalt mixture and preparation method thereof | |
| CN113480861B (en) | Coal liquefaction residue modified asphalt based on particle size grading and preparation method thereof | |
| CN111019362A (en) | Warm mixing agent for asphalt mixture, preparation method and application | |
| Wei et al. | Optimization design of cold patching asphalt liquid based on performance experiments and statistical methods | |
| CN110283616A (en) | A kind of waste tire thermal cracking regeneration carbon black modified material and modified pitch | |
| CN112679145B (en) | Normal-temperature asphalt modifier and application method thereof | |
| CN113861708A (en) | High-viscosity high-elasticity modified asphalt and preparation method thereof | |
| Radziszewski et al. | Asphalt rubber as an alternative of polymer modified bitumen | |
| CN109320973A (en) | A kind of bituminous cements, asphalt and preparation method thereof | |
| CN110885564B (en) | Hot-recycling asphalt mixture recycling agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201023 |
|
| RJ01 | Rejection of invention patent application after publication |