CN110183864B - Special asphalt for improving adhesiveness of stone and asphalt and preparation method thereof - Google Patents
Special asphalt for improving adhesiveness of stone and asphalt and preparation method thereof Download PDFInfo
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- CN110183864B CN110183864B CN201910446649.9A CN201910446649A CN110183864B CN 110183864 B CN110183864 B CN 110183864B CN 201910446649 A CN201910446649 A CN 201910446649A CN 110183864 B CN110183864 B CN 110183864B
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- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention relates to the technical field of asphalt pavement materials for road engineering, in particular to special asphalt for improving the adhesiveness of stone and asphalt and a preparation method thereof. The special asphalt for improving the adhesiveness of stone and asphalt comprises base asphalt, amino silicone resin, a compatilizer and a stabilizer. The special asphalt for improving the adhesiveness of stone and asphalt has the advantages of excellent storage stability, ageing resistance, high material adhesion strength and the like, can obviously improve the adhesiveness between asphalt and stone, improve the adaptability of asphalt to stone and the water damage resistance of asphalt mixture, prolong the service life of a pavement, reduce the pavement cost of the asphalt pavement, and is suitable for the selection of asphalt materials in road construction.
Description
Technical Field
The invention relates to the technical field of asphalt pavement materials for road engineering, in particular to special asphalt for improving the adhesiveness of stone and asphalt and a preparation method thereof.
Background
The peeling of asphalt mixture is one of the common damage phenomena of asphalt pavement, and the peeling refers to that asphalt is separated from the adhered stone surface and then is peeled from the stone surface, and the peeling is the damage process that the asphalt loses the adhesiveness to the stone.
Water is one of the causes of the deterioration of the adhesiveness of asphalt to stone, and asphalt mixtures are surrounded by water for a long time, and the water is easily infiltrated into the interface between asphalt and stone quickly, so that the adhesion of the replacement asphalt to stone causes water damage. The existence of external force is an important factor influencing the adhesion of asphalt and aggregate, and the repeated action of traffic load causes the aggregate to be loose and fall into pits to cause pavement damage.
Besides the load and moisture supply conditions, the deterioration of the adhesion of the asphalt to the stone is mainly determined by the properties of the stone and the nature of the interaction between the asphalt and the stone. At present, the common method for avoiding the phenomenon is to select alkaline stone and high-viscosity modified asphalt, or to add alkaline substances such as lime or anti-stripping agents such as amines into the asphalt mixture. Due to limited storage capacity of stone and regional limitation, the high-viscosity modified asphalt is expensive, and further increases the construction difficulty and cost. Amine anti-stripping agents or lime and the like are adopted to generate certain negative effects on the asphalt or the mixture, such as easy coagulation and segregation of the anti-stripping agents in the asphalt after long-time storage, easy volatilization of the anti-stripping agents in the asphalt heating process, and poor long-term durability of the mixture.
Disclosure of Invention
The special asphalt has the advantages of excellent storage stability, ageing resistance, high material adhesion strength and the like, can obviously improve the adhesion between the asphalt and the stone, improves the adaptability of the asphalt to the stone and the water damage resistance of an asphalt mixture, prolongs the service life of a pavement, reduces the pavement cost of the asphalt pavement, and solves the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a special asphalt for improving the adhesion between stone and asphalt is prepared from base asphalt, amino-silicone resin, compatibilizer and stabilizer.
The matrix asphalt is 70# matrix asphalt, 90# matrix asphalt or 110# matrix asphalt.
-NH in said aminosilicone2And Si in a molar ratio of 0.8 to 1.2; the molecular weight of the amino silicone resin is 1200-1500.
Preferably, the amino silicone resin contains-NH2The mol ratio of Si is 0.9-1.1; the molecular weight of the aminosilicone resin is 1300-1400.
The special asphalt for improving the adhesiveness of stone and asphalt comprises the following raw materials in parts by weight: 95-98 parts of matrix asphalt, 1.4-3 parts of amino silicone resin, 0.5-1.2 parts of compatilizer and 0.1-0.8 part of stabilizer.
Preferably, the special asphalt for improving the stone and asphalt adhesiveness comprises the following raw materials in parts by weight: 96-97 parts of matrix asphalt, 2-3 parts of amino silicone resin, 0.8-1.2 parts of compatilizer and 0.3-0.6 part of stabilizer.
The compatilizer is maleic anhydride compatilizer or acrylic acid compatilizer; the stabilizing agent is stearate.
Preferably, the stearate is magnesium stearate, aluminum stearate or potassium stearate.
The preparation method of the special asphalt for improving the adhesiveness of stone and asphalt comprises the following operation steps:
(1) grinding by a colloid mill: weighing 95-98 parts of matrix asphalt from a high-temperature tank, putting the matrix asphalt into a reaction kettle, adding 1.4-3 parts of amino silicone resin and 0.5-1.2 parts of compatilizer into the reaction kettle, and continuing to react; the grinding speed of the colloid mill is controlled at 6000-9000r/min, and the grinding time is 30-60min, so as to obtain a ground product;
(2) and (3) development of a development pot: and (3) putting the ground product into a development tank, and simultaneously adding 0.1-0.8 part of stearate to obtain the special asphalt after the development is finished.
The temperature of the development tank in the step (2) is controlled at 120-145 ℃, and the development time is 1-3 h.
The special asphalt for improving the adhesiveness of stone and asphalt is applied to road construction.
The special asphalt is applied to improving the adhesiveness of stone and asphalt.
The stone is basalt, limestone or granite.
The invention has the beneficial effects that:
the special asphalt is added with the amino silicone resin, and the amino functional group of the amino silicone resin enables the asphalt and the stone surface to generate adsorption reaction, so that the polarity of the asphalt is improved, and the physical and chemical adsorption force between the asphalt and the stone is improved, thereby improving the adhesion between the asphalt and the stone; secondly, Si-OH bonds existing in the stone can react with Si-O bonds in the amino silicone resin, so that the adhesiveness of the asphalt and the stone is further improved. The colloid mill grinding can ensure that the amino silicone resin is fully dispersed in the matrix asphalt, and then the compatilizer is added in the grinding process to fully swell the molecular chain of the amino silicone resin, increase the extension degree and increase the space positions for chemical reaction. The asphalt and the amino silicone resin are subjected to grafting reaction by adding the stabilizer in the development stage of the development tank, so that the interfacial tension is reduced, and the system structure is more complete and stable.
Compared with common matrix asphalt, the physical performance indexes of the special asphalt prepared by the invention are all in the range of the physical performance indexes of the original matrix asphalt, and the special asphalt has excellent storage stability and ageing resistance, and the most important is that the bonding strength of the asphalt and various stones and the water damage resistance of the asphalt mixture can be obviously improved. The preparation method of the special asphalt only needs to grind by a colloid mill and develop in a development tank, so the comprehensive cost is lower. The construction method of the prepared special asphalt is the same as that of common matrix asphalt or other modified asphalt, can adapt to stone materials in various places at lower cost, and is suitable for large-scale popularization and application.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments.
The specific asphalt of the present invention and the preparation method thereof are described in detail below with reference to examples, and the adhesion properties of the specific asphalt of the present invention are evaluated. The invention is not limited to the following examples, and the test method without specifying the specific conditions was carried out according to the test Specification for road asphalt and asphalt mixture (JTGE 20-2011).
Example 1
The preparation process of the special asphalt comprises the following steps:
(1) grinding by a colloid mill: weighing 95 parts of No. 70 matrix asphalt from a high-temperature tank, putting the matrix asphalt into a reaction kettle, and then adding 3 parts of-NH into the reaction kettle2Continuously reacting the amino silicone resin with the molar ratio of Si of 1.2 and the molecular weight of 1400-1500 with 1.2 parts of maleic anhydride compatilizer to obtain a product; grinding speed of colloid millControlling 7000-9000r/min, and grinding time 45-55 min;
(2) and (3) development of a development pot: putting the ground product into a development tank, adding 0.8 part of magnesium stearate, and stirring to obtain special asphalt after the development is finished; the temperature of the development tank is controlled at 130-145 ℃, and the development time is 1 h.
And (3) performance testing:
the three indexes and the adhesiveness of the special asphalt are tested, and stones adopted in the adhesiveness test are three representative stones of basalt, limestone and granite respectively. And then, adopting an asphalt rotating film heating test for the special asphalt, sampling after the test is finished, and carrying out three index and adhesion tests, wherein specific test results are shown in table 1.
TABLE 1
Example 2
The preparation process of the special asphalt comprises the following steps:
(1) grinding by a colloid mill: weighing 98 parts of No. 90 matrix asphalt from a high-temperature tank, putting the matrix asphalt into a reaction kettle, and then adding 1.4 parts of-NH into the reaction kettle2And the amino silicone resin with the molar ratio of Si of 0.8 and the molecular weight of 1200-1400 and 0.5 part of acrylic compatilizer continue to react to obtain a product; the grinding speed of the colloid mill is controlled at 6000-;
(2) and (3) development of a development pot: putting the ground asphalt into a development tank, adding 0.1 part of potassium stearate, stirring, and obtaining special asphalt after the development is finished; the temperature of the development tank is controlled at 120-130 ℃, and the development time is 3 h.
And (3) performance testing:
the specific asphalt obtained in the above examples was tested in the same manner as in example 1, and the specific test results are shown in table 2.
TABLE 2
Example 3
The preparation process of the special asphalt comprises the following steps:
(1) grinding by a colloid mill: weighing 96 parts of 110# matrix asphalt from a high-temperature tank, putting the matrix asphalt into a reaction kettle, and then adding 2.5 parts of-NH into the reaction kettle2Continuously reacting the amino silicone resin with the molecular weight of 1300-1400 and the maleic anhydride compatilizer of 0.9 part, wherein the molar ratio of the amino silicone resin to the Si is 1, and the amino silicone resin and the maleic anhydride compatilizer are reacted to obtain a product; the grinding speed of the colloid mill is controlled at 7000-8000r/min, and the grinding time is 40-60 min.
(2) And (3) development of a development pot: and (3) putting the ground asphalt into a development tank, adding 0.6 part of aluminum stearate, stirring, and obtaining the special asphalt after the development is finished. The temperature of the development tank is controlled at 120-135 ℃, and the development time is 2 h.
And (3) performance testing:
the specific asphalt obtained in the above examples was tested in the same manner as in example 1, and the specific test results are shown in table 3.
TABLE 3
Example 4
The preparation process of the special asphalt comprises the following steps:
(1) grinding by a colloid mill: 97 parts of No. 70 matrix asphalt is weighed from a high-temperature tank, the matrix asphalt is put into a reaction kettle, and then 1.7 parts of-NH is added into the reaction kettle2Continuously reacting the amino silicone resin with the molar ratio of Si of 1.1 and the molecular weight of 1300-1500 with 1 part of maleic anhydride compatilizer to obtain a product; the grinding speed of the colloid mill is controlled at 7000-8000r/min, and the grinding time is 50-60 min;
(2) and (3) development of a development pot: and (3) putting the ground asphalt into a development tank, adding 0.6 part of aluminum stearate, stirring, and obtaining the special asphalt after the development is finished. The temperature of the development tank is controlled at 120-145 ℃, and the development time is 2 h.
And (3) performance testing:
the specific asphalt obtained in the above examples was tested in the same manner as in example 1, and the specific test results are shown in table 4.
TABLE 4
From the results in tables 1-4, the indexes of the prepared special asphalt are all within the range required by the matrix asphalt, and the stone adhesion grade different from the acidity and alkalinity reaches grade 5; after the asphalt rotating film heating test, the matrix asphalt and different stone materials are subjected to the falling of asphalt films in different degrees and the adhesion grade is reduced, and the prepared special asphalt perfectly wraps the stone material surface to reach the grade 5 degree.
Comparative example 1
The amine anti-stripping agent is used as an additive for 70# base asphalt, the mixing amount is 1 percent of the mass of the 70# asphalt, the stirring is carried out for 15min, the obtained modified asphalt product is tested by the same method as the example 1, and the result is shown in the table 5.
TABLE 5
From the results in Table 5, the modified asphalt with the addition of the amine anti-stripping agent has a lower softening point and can not meet the standard requirements; secondly, after the asphalt rotating film heating test, the adhesion grade of asphalt and aggregate is reduced, which shows that the heat resistance and the aging resistance of the amine anti-stripping agent are poor.
Comparative example 2
Lime was used as an additive for 70# base asphalt in an amount of 5% by mass of 70# asphalt, and the mixture was stirred for 35min, and the obtained modified asphalt product was tested in the same manner as in example 1, and the results are shown in Table 6.
TABLE 6
The results in table 6 show that the penetration and ductility after adding lime to asphalt are greatly reduced and exceed the standard requirements; secondly, compared with the common base asphalt, the aged asphalt mixed with lime has the same adhesion grade with stones with different properties, and the reason for the phenomenon is related to the higher density of lime and the segregation and layering of the asphalt in the aging process.
Comparative example 3
The nano material zycosoil is used as an additive for 70# base asphalt, the mixing amount is 5% of the mass of the 70# asphalt, the stirring is carried out for 10min, and the obtained modified asphalt product is tested by the same method as the example 1, and the result is shown in the table 7.
TABLE 7
The results in table 7 show that the adhesion of asphalt to aggregate can be significantly improved after adding zycosoil to asphalt, but the softening point is greatly reduced and does not meet the specification; secondly, the asphalt adhesion after aging with the addition of zycosoil shows a different decrease. Zycosol has a flash point of 80 ℃ and volatilizes easily during aging, reducing the adhesion rating of the asphalt.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (6)
1. The special asphalt for improving the adhesiveness of stone and asphalt is characterized by comprising the following raw materials: matrix asphalt, amino silicone resin, a compatilizer and a stabilizer;
-NH in said aminosilicone2And Si in a molar ratio of 0.8 to 1.2; the molecular weight of the amino silicone resin is 1200-1500;
the compatilizer is maleic anhydride compatilizer or acrylic acid compatilizer; the stabilizing agent is stearate;
the method for preparing the special asphalt by adopting the components comprises the following operation steps:
(1) grinding by a colloid mill: weighing 95-98 parts of matrix asphalt from a high-temperature tank, putting the matrix asphalt into a reaction kettle, adding 1.4-3 parts of amino silicone resin and 0.5-1.2 parts of compatilizer into the reaction kettle, and continuing to react; the grinding speed of the colloid mill is controlled at 6000-9000r/min, and the grinding time is 30-60min, so as to obtain a ground product;
(2) and (3) development of a development pot: and (3) putting the ground product into a development tank, and simultaneously adding 0.1-0.8 part of stearate to obtain the special asphalt after the development is finished.
2. A specialty asphalt from which stone-to-asphalt adhesion is enhanced according to claim 1, wherein said stearate is magnesium stearate, aluminum stearate or potassium stearate.
3. The special asphalt for improving the adhesiveness of stone and asphalt as claimed in claim 1, wherein the temperature of the development tank in step (2) is controlled at 120-145 ℃ and the development time is 1-3 h.
4. Use of a specialty bitumen for improving stone-to-bitumen adhesion as defined in any one of claims 1 to 3 in road construction.
5. Use of a specialty bitumen as claimed in any one of claims 1 to 3 to improve stone-to-bitumen adhesion.
6. Use according to claim 5, characterized in that: the stone is basalt, limestone or granite.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260412A (en) * | 2011-06-20 | 2011-11-30 | 山东交通学院 | Preparation method of silane coupling agent modified road petroleum asphalt |
| CN104513460A (en) * | 2015-01-26 | 2015-04-15 | 华南理工大学 | Interface modifier material of aggregate-bitumen and application of interface modifier material |
| CN104559235A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Novel high viscosity asphalt and preparation method thereof |
| CN104987735A (en) * | 2015-07-06 | 2015-10-21 | 交通运输部公路科学研究所 | Organosilicone modification epoxy asphalt and mixture |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786329A (en) * | 1987-09-09 | 1988-11-22 | The Dow Chemical Company | Asphalt compositions containing anti-stripping additives prepared from amines or polyamines and phosphonates |
| JP2014162800A (en) * | 2013-02-21 | 2014-09-08 | Toray Ind Inc | Asphalt composition |
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- 2019-05-27 CN CN201910446649.9A patent/CN110183864B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260412A (en) * | 2011-06-20 | 2011-11-30 | 山东交通学院 | Preparation method of silane coupling agent modified road petroleum asphalt |
| CN104559235A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Novel high viscosity asphalt and preparation method thereof |
| CN104513460A (en) * | 2015-01-26 | 2015-04-15 | 华南理工大学 | Interface modifier material of aggregate-bitumen and application of interface modifier material |
| CN104987735A (en) * | 2015-07-06 | 2015-10-21 | 交通运输部公路科学研究所 | Organosilicone modification epoxy asphalt and mixture |
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