CN109180076B - Shape memory asphalt pavement material and self-healing type asphalt pavement structure - Google Patents
Shape memory asphalt pavement material and self-healing type asphalt pavement structure Download PDFInfo
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- CN109180076B CN109180076B CN201811132704.9A CN201811132704A CN109180076B CN 109180076 B CN109180076 B CN 109180076B CN 201811132704 A CN201811132704 A CN 201811132704A CN 109180076 B CN109180076 B CN 109180076B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/12—Shape memory
Abstract
A shape memory asphalt pavement material and a self-healing type asphalt pavement structure comprise, by mass, 1-9 parts of shape memory epoxy resin particles, 3-7 parts of asphalt, 74-90 parts of aggregate and 1-10 parts of filler, wherein the grading of the aggregate is SMA-13 or SMA-16, and the particle size of the aggregate is not more than 16mm or not more than 19 mm; the filler is machine-made sand; the asphalt is SBR modified asphalt. The mixture grade adopted by the upper layer is formed into an SMA type, so that the anti-rutting performance of a self-healing type asphalt pavement structure formed by the shape memory asphalt pavement material is greatly improved, and by doping the shape memory epoxy resin particles with the particle size of 0.5-2 mm into the mixture of the upper layer of the asphalt pavement, the anti-rutting capability of the asphalt is ensured, the improvement effect on the self-healing performance of the asphalt pavement is realized, and the accumulation of the plastic deformation is reduced.
Description
Technical Field
The invention belongs to the field of road engineering, and particularly relates to a shape memory asphalt pavement material and a self-healing type asphalt pavement structure.
Background
The asphalt pavement is widely applied to urban roads and expressways due to excellent pavement performance, and is a main pavement structure form of a high-grade highway in China. The asphalt mixture is an asphalt pavement surface layer material and is directly contacted with the external environment. The asphalt mixture is a temperature sensitive material, the mechanical behavior and the use performance of the asphalt mixture are greatly influenced by the temperature, particularly under the action of continuous high temperature, low temperature and rapid cooling, the asphalt pavement can generate heat stability diseases such as rutting, crowding and pushing, low temperature cracking, temperature cracks and the like, the pavement can generate the phenomena of freezing and frosting under the low-temperature rain and snow freezing climate, the normal use and the service life of the asphalt pavement are seriously influenced, the traffic safety of the highway is also seriously influenced, and the production efficiency of highway transportation is reduced.
The ruts are the products of compaction deformation and shear deformation, and the high temperature and heavy traffic load are the main external inducing factors of the ruts. When a vehicle load acts on an asphalt pavement in a high-temperature environment, the asphalt mixture deforms, although the asphalt mixture has deformation self-healing capacity, the deformation of the asphalt mixture still cannot be completely healed after the load disappears, and unrecoverable deformation remains in the asphalt mixture and is continuously accumulated along with the repeated action of the vehicle load, so that ruts are finally formed. The low-temperature cracking is that the asphalt mixture generates volume shrinkage deformation under the rapid cooling and continuous low-temperature environment of the asphalt pavement, so that the surface layer bears the temperature stress effect, and finally the asphalt surface layer cracks. The generation and development of the two diseases have obvious influence on the service performance of the asphalt pavement and shorten the service life of the asphalt pavement. Therefore, the high-temperature rutting and low-temperature cracking of the asphalt pavement are one of the main problems which are not solved fundamentally in the long-term research in the technical development of the asphalt pavement at home and abroad.
The existing research shows that the raw materials and properties of the asphalt mixture, the mineral aggregate grading composition, the mixture forming structure and the like are main internal influence factors of high-temperature rutting and low-temperature cracking of the asphalt pavement, and the environmental temperature and the vehicle load are main external influence factors. Researchers at home and abroad have carried out long-term research and practice based on improving the high-temperature stability and the low-temperature crack resistance of the asphalt mixture, and adopt measures such as asphalt modification, addition of an external additive, improvement of mineral aggregate grading composition, optimization of mixture mixing proportion, enhancement of construction quality management and the like, so that the capacity of the asphalt mixture for coping with environmental temperature change is remarkably improved, and high-temperature rutting and low-temperature cracking diseases and adverse effects of the asphalt pavement are remarkably reduced. However, due to the limitation of the property of the viscoelastic-plastic material of the asphalt mixture, the accumulation of plastic deformation and the generation of shrinkage deformation of the asphalt mixture under the comprehensive action of repeated driving load and environmental temperature change cannot be avoided, the deformation resistance of the asphalt mixture after various technical measures is adopted is not enough to resist the generation and the accumulation of deformation, and the deformation recovery and self-healing capability of the asphalt mixture is limited, so that the high-temperature rutting and the low-temperature cracking of the asphalt pavement are still not fundamentally solved. Because the root of the high-temperature rutting and the low-temperature cracking of the asphalt pavement is the deformation problem of the asphalt mixture, a new idea and a new method need to be explored from the aspect of improving the deformation recovery capability of the asphalt mixture, the deformation of the asphalt mixture is reduced by improving the high-temperature stability and the low-temperature crack resistance of the asphalt mixture, and the accumulation of the deformation is slowed down by improving the deformation self-recovery capability and the deformation recovery performance of the asphalt mixture.
Shape memory polymers, also known as shape memory polymers, are polymeric materials that can be recovered to their original shape by external stimulation after the initial condition of the article having the original shape is changed and fixed under certain conditions. When the shape memory asphalt pavement material is applied to a pavement structure, the mechanical property and the service performance of a pavement structure system are greatly changed under the influence of traffic load and external environmental factors. How to utilize the characteristics of novel pavement materials, on the premise of ensuring the whole bearing capacity of a pavement structure, the problem that the rut problem needs to be solved by reasonably combining the pavement materials and the pavement materials is solved.
Disclosure of Invention
The invention aims to provide a shape memory asphalt pavement material and a self-healing type asphalt pavement structure with good road performance and shape memory performance, and the shape memory asphalt pavement material and the self-healing type asphalt pavement structure can reduce the accumulation of plastic deformation in real time, slow down the occurrence of ruts and further prolong the service life of the asphalt pavement.
In order to achieve the purpose, the invention adopts the following technical scheme:
the shape memory epoxy resin particle is prepared from the following raw materials in parts by weight:
a method of making shape memory epoxy particles comprising the steps of:
1) weighing 20-60 parts of bisphenol A epoxy resin, 5-25 parts of polyvinyl butyral, 1-20 parts of ethylenediamine, 3-10 parts of sodium stearoyl lactate and 15-30 parts of water in parts by weight;
mixing bisphenol F type epoxy resin, polyvinyl butyral, ethylenediamine and sodium stearyl lactate, and then carrying out emulsification and curing reaction to form shape memory epoxy resin emulsion;
2) adding water into the shape memory epoxy resin emulsion obtained in the step 1), uniformly stirring, curing and molding at 80-120 ℃, and cooling to form shape memory epoxy resin particles.
The invention is further improved in that the temperature of the curing reaction in the step 1) is 70 ℃ and the time is 3 hours.
The invention is further improved in that the particle size of the shape memory epoxy resin particles is 0.5 mm-2 mm.
A shape memory asphalt pavement material of shape memory epoxy resin particles comprises, by mass, 1-9 parts of shape memory epoxy resin particles, 3-7 parts of asphalt, 74-90 parts of aggregate and 1-10 parts of filler, wherein the grading of the aggregate is SMA-13 or SMA-16, and the particle size of the aggregate is not more than 16mm or not more than 19 mm; the filler is machine-made sand; the asphalt is SBR modified asphalt.
A self-healing type asphalt pavement structure comprises an upper surface layer, a middle surface layer, a lower surface layer and a base layer which are sequentially paved on a cushion layer from top to bottom; wherein, the upper layer is prepared by shape memory asphalt pavement material; the middle surface layer is a modified asphalt pavement layer, and the middle surface layer is a modified asphalt mixture layer with the gradation of the nominal maximum grain diameter of 16 mm; the lower surface layer is an asphalt stabilized macadam mixed material layer.
The self-healing asphalt pavement structure is further improved in that the thickness of the upper surface layer of the self-healing asphalt pavement structure is 25-35 mm.
The invention has the further improvement that the thickness of the middle surface layer is 40mm, and the compression resilience modulus at 20 ℃ is 5000-9000 Mpa.
The invention is further improved in that the lower layer is an ATB-30 layer of asphalt stabilized macadam with the grade composition of the nominal maximum grain diameter of 30 mm; the lower layer thickness is 50 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the shape memory asphalt pavement material comprises, by mass, 1-9 parts of shape memory epoxy resin particles, 3-7 parts of asphalt, 74-90 parts of aggregate and 1-10 parts of filler, namely the shape memory epoxy resin particles are adopted to replace the aggregate in the upper layer mixture within the particle size range of 0-2.36 mm, namely the structural composition of the upper layer mixture is influenced to a certain extent, so that the upper layer mixture must be graded to have enough gaps for the shape memory epoxy resin particles to exert the shape memory function. The mixture grade adopted by the upper layer of the invention is formed into the SMA type, so that the anti-rutting performance of the self-healing type asphalt pavement structure formed by the shape memory asphalt pavement material is greatly improved, the test process is determined according to relevant 'specifications', and the test result shows that the anti-rutting performance of the self-healing type asphalt pavement structure is increased by 40 percent compared with that of the common asphalt pavement structure.
(2) According to the invention, through the improvement of the components of the shape memory epoxy resin particles, the glass transition temperature of the traditional shape memory epoxy resin particles is increased, so that the shape memory epoxy resin particles have higher strength at high temperature. By doping the shape memory epoxy resin particles with the particle size range of 0.5-2 mm into the mixture on the upper layer of the asphalt pavement, the self-healing performance of the asphalt pavement is improved while the anti-rutting capability of the asphalt is ensured, and the accumulation of plastic deformation is reduced. Experiments show that the shape memory asphalt pavement material has 50% improvement on the self-healing function of the asphalt pavement.
Drawings
FIG. 1 is a schematic structural view of a self-healing asphalt pavement structure provided by the present invention;
in the figure: 1-upper surface layer; 2-middle surface layer; 3-lower surface layer; 4-a base layer; 5-cushion layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.
The shape memory epoxy resin particle is prepared from the following raw materials in parts by weight:
the method for preparing the shape memory epoxy resin particles comprises the following steps:
1) weighing 20-60 parts of bisphenol A epoxy resin, 5-25 parts of polyvinyl butyral, 1-20 parts of ethylenediamine, 3-10 parts of sodium stearoyl lactate and 15-30 parts of water in parts by weight;
mixing bisphenol F type epoxy resin, polyvinyl butyral, ethylenediamine and sodium stearyl lactate, emulsifying, and curing at 70 deg.C for 3 hr to obtain shape memory epoxy resin emulsion;
2) adding water into the shape memory epoxy resin emulsion obtained in the step 1), uniformly stirring, curing and molding at 80-120 ℃, and cooling to form shape memory epoxy resin particles with the particle size of 0.5-2 mm.
The shape memory asphalt pavement material based on the shape memory epoxy resin particles comprises 1-9 parts of the shape memory epoxy resin particles, 3-7 parts of asphalt, 74-90 parts of aggregate and 1-10 parts of filler by mass, wherein the grading of the aggregate is SMA-13 or SMA-16, and the particle size of the aggregate is not more than 16mm or not more than 19 mm; the filler is machine-made sand; the asphalt is SBR modified asphalt.
Example 7
The shape memory asphalt pavement material comprises, by mass, 100 parts of shape memory epoxy resin particles, 3 parts of asphalt, 90 parts of aggregate and 1 part of filler.
Example 8
The shape memory asphalt pavement material comprises, by mass, 100 parts of shape memory epoxy resin particles, 5 parts of asphalt, 76 parts of aggregate and 10 parts of filler.
Example 9
The shape memory asphalt pavement material comprises, by mass, 100 parts of shape memory epoxy resin particles, 7 parts of asphalt, 84 parts of aggregate and 8 parts of filler.
Example 10
The shape memory asphalt pavement material comprises, by mass, 100 parts of total parts of 9 parts of shape memory epoxy resin particles, 7 parts of asphalt, 74 parts of aggregate and 10 parts of filler.
Referring to fig. 1, a self-healing type asphalt pavement structure based on the shape memory asphalt pavement material comprises an upper surface layer 1, a middle surface layer 2, a lower surface layer 3 and a base layer 4 which are sequentially paved on a cushion layer 5 from top to bottom; wherein the upper layer is prepared from a shape memory asphalt pavement material (namely, 1-9 parts of shape memory epoxy resin particles, 3-7 parts of asphalt, 74-90 parts of aggregate and 1-10 parts of filler are uniformly mixed according to parts by weight); the middle surface layer is a modified asphalt pavement layer, and the middle surface layer is a modified asphalt mixture layer with the gradation of the nominal maximum grain diameter of 16 mm; the lower surface layer is an asphalt stabilized macadam mixed material layer.
Wherein, the thickness of the upper surface layer of the self-healing type asphalt pavement structure is 25-35 mm.
The thickness of the middle surface layer is 40mm, and the compression resilience modulus at 20 ℃ is 5000-9000 Mpa.
The lower surface layer is an ATB-30 layer of asphalt stabilized macadam with the grade composition of the nominal maximum grain diameter of 30 mm; the lower layer thickness is 50 mm.
In the invention, shape memory epoxy resin particles are doped in the existing shape memory asphalt pavement material, the shape memory epoxy resin particles with the particle size of 0.5-2 mm are adopted to replace aggregates with the particle size of 0-2.36 mm in the aggregates, and the shape memory asphalt pavement material in the invention contains 4 components by mass, so that the replacement amount of the shape memory epoxy resin particles is not higher than 10 percent of the total volume of the aggregates and the filler.
The aggregate size is no greater than 16mm or no greater than 19mm, with several grades in each type, and is well known to those skilled in the art.
The invention discloses shape memory epoxy resin particles which are prepared from the following raw materials in parts by weight.
Example 1
Example 2
Example 3
Example 4
Example 5
Example 6
The particle size of the shape memory epoxy resin particles is 0.5-2 mm.
The method of shape-memory epoxy resin particles of examples 1-6, comprising the steps of:
1) mixing bisphenol F type epoxy resin, polyvinyl butyral, ethylenediamine and sodium stearyl lactate in parts by weight, and then carrying out emulsification and curing reaction (curing at 70 ℃ for 3 hours) to form shape memory epoxy resin emulsion;
2) adding mineral water into the shape memory epoxy resin emulsion obtained in the step 1), uniformly stirring, curing and forming at 100 ℃, and cooling to form shape memory epoxy resin particles with the particle size of 0.5-2 mm.
The invention also discloses a shape memory asphalt pavement material, which comprises 1-20 parts of shape memory epoxy resin particles, 3-7 parts of asphalt, 80 parts of aggregate and 20 parts of filler by mass, wherein the grading of the aggregate is SMA-13 or SMA-16, and the grain diameter of the aggregate is not more than 16mm or not more than 19 mm; the filler is machine-made sand; the asphalt is SBR modified asphalt.
When the grading of the asphalt is SMA-13, the particle size is 0-16 mm, part of the aggregate with the particle size within the range of 0-2.36 mm is replaced by shape memory epoxy resin particles, and the mixing amount of the shape memory epoxy resin particles is controlled within 10 percent of the total volume of the aggregate and the filler.
The invention discloses a self-healing type asphalt pavement structure formed by adopting a shape memory asphalt pavement material, and referring to fig. 1, the self-healing type asphalt pavement structure is paved with a shape memory asphalt mixture upper surface layer 1, a modified asphalt mixture middle surface layer 2, an asphalt stabilized macadam lower surface layer 3, a base layer 4 and a cushion layer 5 from top to bottom at one time. The pavement structure can improve the deformation recovery performance of the asphalt mixture, has a self-healing function, has good pavement performance and can meet the use requirement of the asphalt pavement.
The upper layer 1 is constructed by shape memory asphalt pavement material with nominal maximum grain diameter of 13.2mm, SBR modified asphalt is adopted, and the grading is SMA-13. The shape memory epoxy resin particles are adopted to replace stone materials with the grain diameter of 0-2.36 mm in the mixture of the upper surface layer, and the self-healing type asphalt pavement upper surface layer can be formed by construction according to a conventional method. Wherein the mixing amount of the shape memory particles is 5 percent of the total volume of the aggregate and the filler; the thickness of the upper surface layer 1 is 25-35 mm, preferably 30 mm.
The middle surface layer 2 is constructed by SBR modified asphalt mixture, and the adopted grading is the mastic asphalt mixture SMA-13 with the nominal maximum grain diameter of 13.2 mm. The thickness of the middle surface layer 2 is 40mm, and the compression resilience modulus of the middle surface layer at 20 ℃ is 8000 MPa.
The lower layer 3 is constructed from a mixture of asphalt stabilized macadam, the grading adopted being asphalt stabilized macadam ATB-30 with a nominal maximum particle size of 30 mm. The thickness of the lower layer 3 is 50 mm.
The base layer 4 is constructed of cement stabilized graded crushed stone and has a thickness of 300 mm.
The bedding layer 5 is constructed of cement stabilized graded gravel and has a thickness of 150 mm.
The method of application number 201510316791.3 is adopted to test the pavement material, and the test result shows that the shape memory asphalt pavement material has 50% improvement on the self-healing function of the asphalt pavement.
Claims (9)
1. A shape memory epoxy particle, characterized by: the composite material is prepared from the following raw materials in parts by mass:
2. a method of making shape memory epoxy particles comprising the steps of:
1) weighing 20-60 parts of bisphenol A epoxy resin, 5-25 parts of polyvinyl butyral, 1-20 parts of ethylenediamine, 3-10 parts of sodium stearoyl lactate and 15-30 parts of water in parts by weight;
mixing bisphenol A type epoxy resin, polyvinyl butyral, ethylenediamine and sodium stearyl lactate, and then carrying out emulsification and curing reaction to form shape memory epoxy resin emulsion;
2) adding water into the shape memory epoxy resin emulsion obtained in the step 1), uniformly stirring, curing and molding at 80-120 ℃, and cooling to form shape memory epoxy resin particles.
3. The method for preparing shape-memory epoxy resin particles according to claim 2, wherein the curing reaction in step 1) is carried out at a temperature of 70 ℃ for 3 hours.
4. The method of claim 2, wherein the shape-memory epoxy resin particles have a particle size of 0.5mm to 2 mm.
5. A shape-memory asphalt pavement material based on the shape-memory epoxy resin particles as claimed in any one of claims 2 to 4, characterized by comprising, in parts by mass, 1 to 9 parts of shape-memory epoxy resin particles, 3 to 7 parts of asphalt, 74 to 90 parts of aggregate, and 1 to 10 parts of filler, wherein the aggregate is of a gradation of SMA-13 or SMA-16, and the aggregate has a particle size of not more than 16mm or not more than 19 mm; the filler is machine-made sand; the asphalt is SBR modified asphalt.
6. A self-healing type asphalt pavement structure based on the shape memory asphalt pavement material according to claim 5, characterized by comprising an upper surface layer, a middle surface layer, a lower surface layer and a base layer which are sequentially laid on a cushion layer from top to bottom; wherein, the upper layer is prepared by shape memory asphalt pavement material; the middle surface layer is a modified asphalt pavement layer, and the middle surface layer is a modified asphalt mixture layer with the gradation of the nominal maximum grain diameter of 16 mm; the lower surface layer is an asphalt stabilized macadam mixed material layer.
7. A self-healing asphalt pavement structure according to claim 6, wherein the thickness of the upper layer of the self-healing asphalt pavement structure is 25-35 mm.
8. A self-healing asphalt pavement structure according to claim 6, wherein the middle surface layer has a thickness of 40mm and a compression resilience modulus at 20 ℃ of 5000 to 9000 MPa.
9. A self-healing asphalt pavement structure according to claim 6, wherein the lower surface layer is an ATB-30 layer of asphalt stabilized macadam graded to a nominal maximum particle size of 30 mm; the lower layer thickness is 50 mm.
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| CN201811132704.9A CN109180076B (en) | 2018-09-27 | 2018-09-27 | Shape memory asphalt pavement material and self-healing type asphalt pavement structure |
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| CN112900183B (en) * | 2021-01-18 | 2021-11-19 | 哈尔滨学院 | Graphene-based self-snow-melting pavement structure with shape memory function |
| CN112878133B (en) * | 2021-01-18 | 2021-11-05 | 哈尔滨学院 | Self-snow-melting pavement structure based on graphene |
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Non-Patent Citations (4)
| Title |
|---|
| Analysis of Preparation and Properties on Shape;Biao Ma等;《applied sciences》;20170523;第7卷(第523期) * |
| Shape memory polyurethanes based on recycled polyvinyl butyral. I. Synthesis and morphology;Tsvetomir Tsonev等;《Central European Journal of Chemistry》;20131231;第11卷(第12期);2058-2065 * |
| Thermal, mechanical and shape memory properties of shape memory epoxy resin;Yuyan Liu等;《Materials Science and Engineering A》;20101231;第527卷;2510–2514 * |
| 形状记忆环氧树脂的制备及性能研究;赖学平;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20090315;B020-53 * |
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