CN114031816B - Efficient liquid asphalt warm-mixing agent and application method thereof - Google Patents
Efficient liquid asphalt warm-mixing agent and application method thereof Download PDFInfo
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Abstract
The invention relates to the field of road and bridge materials, in particular to a high-efficiency liquid asphalt warm-mixing agent and a preparation method and an application method thereof. The technical points are as follows: the efficient liquid asphalt warm-mixing agent comprises 4-8 parts of fatty acid, 0.5-1 part of carboxylated graphene, 10-20 parts of triethanolamine, 5-10 parts of polyene polyamine and 10-20 parts of a nonionic surfactant. According to the efficient liquid asphalt warm-mixing agent and the application method thereof provided by the invention, warm-mixed asphalt can be better spread on the surface of stone materials, the coating thickness of the warm-mixed asphalt on the surface of the stone materials is increased, the Marshall stability, the dynamic stability and the low-temperature bending performance of the asphalt mixture are improved, and the water damage resistance of the asphalt mixture is improved while the warm mixing of the asphalt mixture is realized.
Description
Technical Field
The invention relates to the field of road and bridge materials, in particular to a high-efficiency liquid asphalt warm-mixing agent and an application method thereof.
Background
The warm mix asphalt mixture has the characteristics of easy compaction of warm mix, smoke suppression, energy conservation and the like, and is a future development trend in the field of road and bridge pavement. The commercially available products have two forms of solid and liquid, the solid product comprises synthetic zeolite powder and organic wax, the liquid product comprises emulsified asphalt for warm mixing and soap liquor concentrated solution, the products play a warm mixing effect and mainly improve the viscosity reduction effect on the asphalt or the interface effect of the asphalt and stone, and the improvement of the wrapping property of the asphalt on the stone needs to introduce charge into the asphalt or improve the surface free energy of the asphalt.
In view of the defects of the existing warm-mix agent, the inventor develops a high-efficiency liquid asphalt warm-mix agent and an application method thereof based on years of abundant experience and professional knowledge of the materials, and by matching with theoretical analysis and research innovation, the warm-mix asphalt can be better spread on the surface of stone, the coating thickness of the warm-mix asphalt on the surface of the stone is increased, the Marshall stability, the dynamic stability and the low-temperature bending performance of the asphalt mixture are improved, and the water damage resistance of the asphalt mixture is improved while the warm mixing of the asphalt mixture is realized.
Disclosure of Invention
The invention aims to provide an efficient liquid asphalt warm-mixing agent, which solves the problems of easy compaction of warm-mixing and stone wrapping property of asphalt and improves the Marshall stability, dynamic stability and low-temperature bending property of an asphalt mixture.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a high-efficiency liquid asphalt warm-mixing agent, which comprises 4-8 parts of fatty acid, 0.5-1 part of carboxylated graphene, 10-20 parts of triethanolamine, 5-10 parts of polyene polyamine and 10-20 parts of nonionic surfactant. According to the invention, the warm-mixing agent I is obtained through an esterification reaction among fatty acid, carboxylated graphene and triethanolamine, the surface free energy of the asphalt is greatly improved, and the nonionic surfactant improves the interface acting force between the asphalt and stone; and the mixture generated by the amidation of the warm mixing agent I and the polyene polyamine chemical bond can cooperate with the warm mixing agent I to play a warm mixing role and improve the coating performance of the asphalt on stone.
Further, the fatty acid is any one of stearic acid, palmitic acid or oleic acid. The carboxyl of the fatty acid can react with triethanolamine through esterification, the nonpolar straight-chain alkane in the generated product can have good compatibility with asphalt, and the polar amino can capture the polar groups on the surface of stone.
Furthermore, the number of the layers of the carboxylated graphene is 5-10, and the size of the carboxylated graphene is 15-50 mu m. The graphene in the carboxylated graphene has a plurality of aromatic rings and good compatibility with asphalt, and the carboxyl on the surface of the graphene and triethanolamine can be subjected to esterification reaction. The carboxylated graphene with the size of 15-50 um is selected, so that continuous dispersion in asphalt is facilitated, and the phenomenon that the graphene is small in size and is isolated and dispersed or the graphene is agglomerated due to large size is avoided, and the fact that the industrialized carboxylated graphene is adopted is considered to select 5-10 layers, and cost is reduced.
Further, the polyene polyamine is diethylenetriamine. The diethylenetriamine can be combined with a water film on the surface of stone, is distributed on the surface of the stone, and has amidation reaction with the residual fatty acid or the carboxylated graphene in the warm-mixing agent I, and the diethylenetriamine and the warm-mixing agent I play a synergistic role to jointly play a warm-mixing effect, so that the coating performance of the asphalt on the stone is improved through the chemical bond effect.
The second purpose of the invention is to provide an application method of the high-efficiency liquid asphalt warm-mixing agent, which has the same technical effect.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides an application method of a high-efficiency liquid warm-mix asphalt agent, which comprises the steps of reacting fatty acid, carboxylated graphene and triethanolamine to obtain a warm-mix agent I, adding the warm-mix agent I into asphalt to obtain warm-mix asphalt containing the warm-mix agent I, adding polyene polyamine and a nonionic surfactant into the warm-mix asphalt to ensure that the polyene polyamine and the warm-mix agent I are subjected to acylation reaction, and when the warm-mix agent I is used for warm mixing, the surface free energy of the prepared warm-mix asphalt is improved, so that the warm-mix asphalt can be better spread on the surface of stone materials, and the polyene polyamine and the warm-mix agent I amidated with polyene polyamine have a synergistic effect, thereby further improving the mechanical property of the warm-mix asphalt.
Furthermore, the addition mode of the polyene polyamine and the nonionic surfactant is that the polyene polyamine and the nonionic surfactant are enriched on the surface of stone material, and then the stone material enriched with the polyene polyamine and the nonionic surfactant is added into the warm-mixed asphalt. The nonionic surfactant and the polyene polyamine are combined with trace moisture on the surface of the stone through polar groups to form a film on the surface of the stone, and the nonpolar groups are dissolved with the warm-mixed asphalt, so that the film is enriched on the surface of the stone and then added into the warm-mixed asphalt, and the coating thickness of the warm-mixed asphalt on the surface of the stone can be increased.
According to the invention, coconut oil diethanolamine is used as a nonionic surfactant and has polar and nonpolar groups, the coating of warm-mixed asphalt with a warm-mixing agent I on stone can be improved in the process of mixing an asphalt mixture, the coconut oil diethanolamine does not participate in the reaction of preparing a warm-mixing agent II from the warm-mixing agent I, diethylenetriamine reacts with the warm-mixing agent I to generate an amide compound, the coconut oil diethanolamine also has warm-mixing performance, and unreacted diethylenetriamine has a basic group, so that the coating of the stone by the asphalt can be improved in the mixture.
Further, the application method of the high-efficiency liquid asphalt warm-mixing agent provided by the invention specifically comprises the following operation steps:
s1, heating fatty acid and carboxylated graphene, slowly adding triethanolamine, and uniformly stirring to obtain a warm mixing agent I;
s2, adding the warm-mix agent I into asphalt, and stirring to obtain warm-mix asphalt;
s3, washing the surface of the stone material with water, removing dust and drying, and enriching the nonionic surfactant and the polyene polyamine on the surface of the stone material by a soaking and drying method;
and S4, adding the stone material obtained in the step S3 into the warm-mixed asphalt obtained in the step S2 to prepare a warm-mixed asphalt mixture. In the invention, the warm-mixing agent I is adopted to firstly modify the asphalt to generate a warm-mixing effect, and then the warm-mixing agent I and the polyene polyamine are subjected to amidation reaction to obtain a mixture, wherein the amidated warm-mixing agent I continuously generates the warm-mixing effect, and the polyene polyamine which is not amidated has an alkaline group and has pre-coating and attaching capacity to stone materials.
Furthermore, the polyene polyamine and the nonionic surfactant are sprayed on the surface of the stone material in a high-pressure air spraying mode.
Further, the asphalt is SBS modified asphalt. The SBS modified asphalt is a precondition for ensuring the pavement performance of the warm-mix asphalt mixture, and the SBS modified asphalt emphasizes the high-low temperature performance of the asphalt mixture.
Furthermore, the stone material is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%. The selection can reach the target void ratio range of the asphalt mixture.
Further, the method comprises the following steps:
s1, heating fatty acid and carboxylated graphene to 170 ℃, slowly adding triethanolamine, and stirring for 2 hours at 500r/min to prepare a warm-mixing agent I;
s2, adding the warm-mixing agent I into asphalt, and stirring for 1h at 200r/min to prepare warm-mixing asphalt;
s3, washing the surface of the stone material with water, removing dust, drying, and enriching a nonionic surfactant and polyene polyamine on the surface of the stone material in a wetting and drying manner;
s4, heating the warm-mixed asphalt in the step S2 to 160 ℃, heating the stone material in the step S3 to 155 ℃, and uniformly mixing to prepare a warm-mixed asphalt mixture.
In conclusion, the invention has the following beneficial effects:
according to the invention, the warm-mixing agent I is generated by the reaction of fatty acid, carboxylated graphene and triethanolamine, and the surface free energy of the prepared warm-mixing asphalt is improved while the warm-mixing agent I is used for warm mixing, so that the warm-mixing asphalt can be better spread on the surface of stone. And secondly, the coconut oil diethanol amine and the polyene polyamine are combined with trace moisture on the surface of the stone through polar groups to form a film on the surface of the stone, and nonpolar groups are dissolved with the warm-mixed asphalt, so that the coating thickness of the warm-mixed asphalt on the surface of the stone is increased. Finally, the polyene polyamine and the residual carboxyl in the warm mixing agent I are subjected to amidation reaction to generate an amide compound, and the amide compound, the warm mixing agent I and the residual polyene polyamine form a new mixture with warm mixing capability, so that the stone wrapping capability of the warm mixing asphalt is further improved; the carboxylated graphene is distributed in the asphalt, so that the Marshall stability, the dynamic stability and the low-temperature bending performance of the asphalt mixture are further improved on the basis of the SBS modified asphalt, and the water loss resistance of the asphalt mixture is improved while the warm mixing of the asphalt mixture is realized.
Detailed Description
To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined objects, the detailed description of the embodiments, features and effects of the high-efficiency liquid asphalt warm-mixing agent and the application method thereof according to the present invention is as follows.
Sources of raw materials used in the examples:
oleic acid: industrial grade, pengzhou langrun chemical ltd;
carboxylated graphene: suzhou Cifeng graphene technologies, inc.;
triethanolamine: analytical purity, chemical reagents of national drug group limited;
coconut oil diethanolamine: analytical purity, chemical reagents of national drug group limited;
diethylenetriamine: analytical purity, chemical reagents of national drug group limited;
asphalt: SBS modified asphalt, jiangsu Zhongyi passway New Material Co., ltd;
basalt stone: jiangsu Maodi group, inc.;
palmitic acid: analytical purity, chemical reagents of national drug group limited;
stearic acid: analytically pure, chemical reagents of national drug group, ltd.
Example 1: efficient liquid asphalt warm-mixing agent and application method thereof
The high-efficiency liquid asphalt warm-mixing agent provided by the embodiment comprises a warm-mixing agent I, diethylenetriamine and coconut diethanol amine, wherein the preparation method of the warm-mixing agent I is as follows: heating 80g of oleic acid and 10g of carboxylated graphene to 170 ℃, slowly adding 20g of triethanolamine, and stirring at 500r/min for 2h to prepare a warm-mixing agent I.
In the embodiment, the preparation process of the high-efficiency liquid asphalt warm-mixing agent is completed in the process of preparing the asphalt mixture, so that the preparation procedures of the high-efficiency liquid asphalt warm-mixing agent are reduced, meanwhile, the warm-mixing agent I, the polyene polyamine and the polyene polyamine amidated by the warm-mixing agent I are cooperated to play a warm-mixing role, and the coating performance of asphalt on stone is improved. The method comprises the following specific steps:
s1, adding 0.5g of warm-mix agent I into 100g of asphalt, and stirring for 1h at a speed of 200r/min to prepare warm-mix asphalt;
s2, washing, dedusting and drying the stone surface, and enriching 1667g of stone surface with 2g of coconut oil diethanolamine and 1g of diethylenetriamine in a soaking and drying manner;
s3, heating the warm-mixed asphalt in the step S1 to 160 ℃, preheating the stone material in the step S2 to 155 ℃, and mixing and stirring the stone material and the stone material uniformly to prepare a warm-mixed asphalt mixture.
Wherein the stone is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
Example 2: efficient liquid asphalt warm-mixing agent and application method thereof
The high-efficiency liquid asphalt warm-mixing agent provided by the embodiment comprises a warm-mixing agent I, coconut oil diethanolamine and diethylenetriamine, wherein the preparation method of the warm-mixing agent I is as follows: heating 100g of palmitic acid and 14g of carboxylated graphene to 170 ℃, slowly adding 24g of triethanolamine, and stirring at 500r/min for 2h to prepare a warm-mixing agent I.
In the embodiment, the preparation process of the high-efficiency liquid asphalt warm-mixing agent is completed in the process of preparing the asphalt mixture, so that the preparation procedures of the warm-mixing agent are reduced, and the effect of the high-efficiency liquid asphalt warm-mixing agent is exerted more fully, and the preparation method comprises the following specific steps:
s1, adding 0.5g of warm-mix agent I into 100g of asphalt, and stirring for 1h at 200r/min to prepare warm-mix asphalt;
s2, washing the stone surface with water, removing dust and drying, and enriching 2.4g of coconut oil diethanolamine and 1.4g of diethylenetriamine on 1667g of stone surface in a soaking and drying manner;
s3, heating the warm-mixed asphalt in the step S1 to 160 ℃, preheating the stone material in the step S2 to 155 ℃, and mixing and stirring the stone material and the stone material uniformly to prepare a warm-mixed asphalt mixture.
Wherein the stone material is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
Example 3: efficient liquid asphalt warm-mixing agent and application method thereof
The high-efficiency liquid asphalt warm-mixing agent provided by the embodiment comprises a warm-mixing agent I, diethylenetriamine and coconut diethanol amine, wherein the preparation method of the warm-mixing agent I is as follows: heating 140g of stearic acid and 18g of carboxylated graphene to 170 ℃, slowly adding 32g of triethanolamine, and stirring at 500r/min for 2h to prepare a warm-mixing agent I.
In this embodiment, the preparation process of the high-efficiency liquid asphalt warm-mixing agent is completed in the process of preparing the asphalt mixture, so that the preparation procedures of the warm-mixing agent are reduced, and the effect of the high-efficiency liquid asphalt warm-mixing agent is exerted more fully, and the preparation method comprises the following specific steps:
s1, adding 0.5g of warm-mix agent I into 100g of asphalt, and stirring for 1h at a speed of 200r/min to prepare warm-mix asphalt;
s2, washing the stone surface with water, removing dust and drying, and enriching 3.2g of coconut oil diethanolamine and 1.8g of diethylenetriamine on 1667g of stone surface in a soaking and drying manner;
s3, heating the warm-mixed asphalt in the step S1 to 160 ℃, preheating the stone material in the step S2 to 155 ℃, and mixing and stirring the stone material and the stone material uniformly to prepare a warm-mixed asphalt mixture.
Wherein the stone material is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
Example 4: efficient liquid asphalt warm-mixing agent and application method thereof
The high-efficiency liquid asphalt warm-mixing agent provided by the embodiment comprises a warm-mixing agent I, diethylenetriamine and coconut diethanol amine, wherein the preparation method of the warm-mixing agent I is as follows: 160g of oleic acid and 20g of carboxylated graphene are heated to 170 ℃, 40g of triethanolamine is slowly added, and stirring is carried out at 500r/min for 2 hours to prepare a warm-mixing agent I.
In this embodiment, the preparation process of the high-efficiency liquid asphalt warm-mixing agent is completed in the process of preparing the asphalt mixture, so that the preparation procedures of the warm-mixing agent are reduced, and the effect of the high-efficiency liquid asphalt warm-mixing agent is exerted more fully, and the preparation method comprises the following specific steps:
s1, adding 0.5g of warm-mix agent I into 100g of asphalt, and stirring for 1h at a speed of 200r/min to prepare warm-mix asphalt;
s2, washing the stone surface with water, removing dust and drying, and enriching 4g of coconut oil diethanolamine and 2g of diethylenetriamine on 1667g of stone surface in a soaking and drying manner;
s3, heating the warm-mixed asphalt in the step S1 to 160 ℃, preheating the stone to 155 ℃, and mixing and stirring the stone and the warm-mixed asphalt uniformly to prepare a warm-mixed asphalt mixture.
Wherein the stone material is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
Comparative example 1: warm mixing agent and application method thereof
The warm-mixing agent provided in the comparative example comprises a warm-mixing agent I, diethylenetriamine and coconut diethanol amine, wherein the preparation method of the warm-mixing agent I comprises the following steps: heating 80g of oleic acid to 170 ℃, slowly adding 20g of triethanolamine, and stirring at 500r/min for 2 hours to prepare a warm-mixing agent I.
The preparation process of the warm mixing agent in the comparative example is completed in the process of preparing the asphalt mixture, and the specific steps are as follows:
s1, adding 0.5g of warm-mix agent I into 100g of asphalt, and stirring for 1h at 200r/min to prepare warm-mix asphalt;
s2, washing the surface of stone, removing dust, and drying, wherein 2g of coconut oil diethanolamine and 1g of diethylenetriamine are enriched on 1667g of the surface of the stone in a soaking and drying manner;
and S3, heating the warm-mixed asphalt in the step S1 to 160 ℃, preheating the stone to 155 ℃, and uniformly mixing and stirring the stone and the warm-mixed asphalt to prepare a warm-mixed asphalt mixture.
Wherein the stone material is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
Comparative example 2: warm mixing agent and application method thereof
The warm-mixing agent provided in the comparative example comprises 2g of coconut diethanol amine and 1g of diethylenetriamine.
The preparation process of the warm mixing agent in the comparative example is completed in the process of preparing the asphalt mixture, and the specific steps are as follows:
s1, washing the surface of stone, removing dust and drying, and enriching 1667g of stone surface with 2g of coconut oil diethanolamine and 1g of diethylenetriamine in a soaking and drying manner;
s2, heating the asphalt to 160 ℃, preheating the stone to 155 ℃, and mixing and stirring the asphalt and the stone uniformly to prepare the warm-mixed asphalt mixture.
Wherein the stone is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
Comparative example 3: warm mixing agent and application method thereof
The warm mixing agent provided in the comparative example includes 80g of oleic acid, 10g of carboxylated graphene and 20g of triethanolamine.
The preparation method of the warm mixing agent comprises the following steps: heating 80g of oleic acid and 10g of carboxylated graphene to 170 ℃, slowly adding 20g of triethanolamine, and stirring at 500r/min for 2 hours to prepare a warm-mixing agent.
The preparation method of the warm mix asphalt in the comparative example comprises the following specific steps:
s1, adding 0.5g of warm-mix agent into 100g of asphalt, and stirring for 1h at 200r/min to prepare warm-mix asphalt;
s2, heating the asphalt to 160 ℃, washing 1667g of stone surface with water, removing dust, drying, preheating to 155 ℃, and mixing and stirring uniformly to prepare the warm-mixed asphalt mixture.
Wherein the stone is basalt, the grading is SMA-13, and the oil-stone ratio is 6.0%.
And (4) performance testing:
the properties of examples 1 to 4 and comparative examples 1 to 3 are shown in the following table.
TABLE 1 results of performance test of examples 1 to 4 and comparative examples 1 to 3
The coconut oil diethanolamine and diethylenetriamine in example 4 are added in the most amount compared with examples 1-3. Coconut oil diethanolamine is used as a nonionic surfactant, has polar and nonpolar groups, and can improve the coating of the warm-mixed asphalt with the warm-mixing agent I on stone materials in the process of mixing the asphalt mixture. The reacted diethylenetriamine and the warm-mixed agent I are subjected to esterification reaction, so that the coating property of the asphalt on stone is improved, the residual unreacted diethylenetriamine is alkaline, so that the coating property of the warm-mixed asphalt on stone is improved, and the anti-stripping grade of example 4 is grade 5.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The efficient liquid asphalt warm-mixing agent is characterized by comprising 40-80 parts of fatty acid, 5-10 parts of carboxylated graphene, 10-20 parts of triethanolamine, 5-10 parts of polyene polyamine and 10-20 parts of a nonionic surfactant;
the fatty acid is any one of stearic acid, palmitic acid or oleic acid;
the number of the carboxylated graphene layers is 5 to 10, and the size is 15 to 50 mu m;
the polyene polyamine is diethylenetriamine;
the nonionic surfactant is coconut diethanol amine.
2. The application method of the high-efficiency liquid warm asphalt mixing agent as claimed in claim 1, characterized in that fatty acid, carboxylated graphene and triethanolamine are reacted to obtain a warm mixing agent I, the warm mixing agent I is added into asphalt to obtain warm-mixed asphalt containing the warm mixing agent I, and then polyene polyamine and nonionic surfactant are added into the warm-mixed asphalt.
3. The application method of the high-efficiency liquid asphalt warm-mixing agent as claimed in claim 2, wherein the preparation method of the warm-mixing agent I comprises the following specific steps: heating fatty acid and carboxylated graphene to 170 ℃, slowly adding triethanolamine, and stirring for 2h at 500 r/min.
4. The method for using the high-efficiency liquid warm mix asphalt agent according to claim 2, wherein the polyene polyamine and the nonionic surfactant are added in such a manner that the polyene polyamine and the nonionic surfactant are enriched on the surface of the stone material, and then the stone material enriched with the polyene polyamine and the nonionic surfactant is added to the warm mix asphalt.
5. The application method of the high-efficiency liquid asphalt warm-mixing agent according to claim 3 or 4, is characterized by comprising the following operation steps:
s1, heating fatty acid and carboxylated graphene, slowly adding triethanolamine, and uniformly stirring to obtain a warm-mixing agent I;
s2, adding the warm-mixing agent I into asphalt, and stirring to obtain warm-mixing asphalt;
s3, washing the surface of the stone material with water, removing dust and drying, and enriching the nonionic surfactant and the polyene polyamine on the surface of the stone material in a wetting and drying manner;
and S4, adding the stone material obtained in the step S3 into the warm-mixed asphalt obtained in the step S2 to prepare a warm-mixed asphalt mixture.
6. The application method of the high-efficiency liquid asphalt warm-mixing agent according to claim 5, characterized in that the stone is basalt with a grading of SMA-13 and an oilstone ratio of 6.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111405233.6A CN114031816B (en) | 2021-11-24 | 2021-11-24 | Efficient liquid asphalt warm-mixing agent and application method thereof |
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| CN108239302B (en) * | 2018-02-24 | 2019-12-10 | 长安大学 | asphalt warm-mixing agent, preparation method and application |
| CN109266026A (en) * | 2018-09-14 | 2019-01-25 | 中南林业科技大学 | Graphene oxide and the compound modification warm-mixed asphalt of waste edible oil and preparation method |
| CN109852084A (en) * | 2019-01-18 | 2019-06-07 | 山东建筑大学 | A kind of pitch based graphite alkenes asphalt warm-mix agent and preparation method thereof |
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