CN113667405B - Asphalt pavement structure - Google Patents
Asphalt pavement structure Download PDFInfo
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- CN113667405B CN113667405B CN202111054805.0A CN202111054805A CN113667405B CN 113667405 B CN113667405 B CN 113667405B CN 202111054805 A CN202111054805 A CN 202111054805A CN 113667405 B CN113667405 B CN 113667405B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
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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
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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Abstract
The invention discloses an asphalt pavement structure which sequentially comprises a road base layer, a first waterproof layer, a cement-asphalt composite structure layer, a second waterproof layer and an asphalt surface layer from bottom to top. This application starts from the road surface structure, adopts cement concrete and the mutual gomphosis of bituminous mixture to form the composite construction layer, has both played cement concrete rigid pavement and has born the advantage strong with anti-shear capacity, for forming strong combination with the bituminous surface layer again and has created the condition to demonstrate the good small in noise characteristics of flexible road surface travelling comfort.
Description
Technical Field
The application relates to the field of highway and urban road engineering, in particular to an asphalt pavement structure.
Background
The asphalt pavement is various types of pavement paved by blending asphalt materials into mineral materials, and has the advantages of comfortable driving, low noise and the like. The asphalt binder can improve the capability of the paving aggregate to resist damage of traveling vehicles and natural factors to the pavement, so that the pavement is smooth, less in dust, impermeable and durable. According to the regulations in the design Specification of asphalt road surfaces of roads, an asphalt road surface structural layer consists of three parts: a top layer, a base layer, and a bottom layer. Most high-grade pavements in China adopt semi-rigid base asphalt pavement structures.
The asphalt pavement structure belongs to a flexible pavement structure. The asphalt mixture is a mixture formed by mixing crushed stone with asphalt and is a combination of discrete materials. The stones in the mixture are mutually embedded and extruded, and the stones are bonded by asphalt to form a bearing structure layer. The structural layer has higher vertical bearing capacity, but the constraint force among stones is not enough, and the capacity of bearing horizontal shearing force is poorer. The flexible pavement material can deform under the action of load, when the load exceeds the bearable limit, stones of the asphalt mixture lose adhesion to generate looseness and pit damage, pavement structural layers often generate displacement, the pavement has defects such as ruts, bags and the like, and the phenomena of traffic lights and intersections of urban roads are serious. Climbing wheels of heavy vehicles on the uphill road section generate large horizontal friction force on the road surface, and the flexible road surface has poor horizontal force bearing capacity and is easy to damage the road surface. In addition, the semi-rigid base layer is easy to crack due to drying shrinkage or temperature shrinkage, and then the crack is transmitted to the asphalt layer to form a reflection crack. Water on the road surface can penetrate into the interior of the road structure through cracks to cause damage to the road surface.
Disclosure of Invention
In view of this, the embodiment of the application provides an asphalt pavement structure to solve the technical problems that the existing asphalt pavement has serious early damage to the pavement and the service life is difficult to meet the design requirements.
According to the embodiment of the application, provide an asphalt pavement structure, wherein, include road bed layer, first waterproof layer, cement-pitch composite construction layer, second waterproof layer and pitch surface course from bottom to top in proper order.
Optionally, the road base layer is laid on the ground, and a semi-rigid or rigid base layer in the current asphalt pavement laying is adopted.
Optionally, the first waterproof layer and the second waterproof layer are both prepared from emulsified asphalt modified by synergy of nanocellulose, thermoplastic and thermosetting, and the emulsified asphalt comprises the following components in parts by weight: 100 weight portions of matrix asphalt, 0.5 to 3 weight portions of nano cellulose, 1.2 to 4.4 weight portions of emulsifier, 100 to 400 weight portions of deionized water, 2 to 9 weight portions of thermoplastic polymer, 0.1 to 0.3 weight portion of stabilizer, 47 to 78 weight portions of thermosetting polymer and 14 to 30 weight portions of curing agent.
The preparation method of the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt comprises the following steps:
the method comprises the following steps: preparing a thermoplastic asphalt material compositely modified by nano-cellulose and a thermoplastic polymer;
step two: adding an emulsifier into water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: heating the modified asphalt prepared in the first step to 170-185 ℃ to be in a flowing state, then adding the emulsifier aqueous solution prepared in the second step into the asphalt, and shearing and stirring by using a shearing machine to obtain nano cellulose polymer composite modified asphalt emulsion;
step four: and C, adding thermosetting resin into the asphalt emulsion prepared in the step three, uniformly mixing, and finally adding a curing agent, and uniformly mixing to obtain the emulsified asphalt material cooperatively modified by the nano-cellulose, the thermoplastic and the thermosetting.
The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating the matrix asphalt to a flowing state, adding the nano-cellulose thermoplastic polymer composite modifier, and fully stirring or shearing until the nano-cellulose thermoplastic polymer composite modifier is uniformly dispersed to obtain a premixed asphalt material;
step two: and (4) adding the stabilizer into the premixed asphalt material prepared in the first step, and fully stirring or shearing the mixture until the mixture is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
The preparation method of the nano-cellulose thermoplastic polymer composite modifier comprises the following steps:
the method comprises the following steps: adding a thermoplastic polymer into a low-boiling-point organic solvent, adding deionized water after the thermoplastic polymer is fully dissolved, then adding an emulsifier for emulsification, and then carrying out reduced pressure distillation to recover an organic solution to obtain a polymer emulsion;
step two: adding nano-cellulose into deionized water, and performing ultrasonic oscillation and stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: adding the nano-cellulose aqueous solution prepared in the step two into the polymer emulsion prepared in the step one, and shearing to obtain a uniform mixed solution of the polymer and the nano-cellulose; demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to prepare a nano-cellulose thermoplastic polymer composite modifier raw material;
step four: and C, crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three to obtain the nano-cellulose thermoplastic polymer composite modifier.
Another preparation method of the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material comprises the following steps:
the method comprises the following steps: heating the matrix asphalt to 160 ℃, adding a thermoplastic polymer and a stabilizer, heating to 170-185 ℃, fully stirring and grinding to obtain a thermoplastic modified asphalt material, and maintaining the temperature at 170-185 ℃;
step two: sequentially adding an emulsifier and an auxiliary agent into water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: adding the emulsifier aqueous solution prepared in the step two into the thermoplastic modified asphalt material prepared in the step one, and shearing and stirring by using a shearing machine to obtain thermoplastic modified emulsified asphalt;
step four: preparing a nanocellulose thermosetting polymer composite modifier;
step five: and (4) adding the nano-cellulose/thermosetting resin composite modifier prepared in the fourth step into the emulsified asphalt prepared in the third step, uniformly mixing, and finally adding a curing agent, and uniformly mixing to obtain the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material.
The preparation method of the nanocellulose thermosetting polymer composite modifier comprises the following steps:
the method comprises the following steps: adding nano-cellulose into deionized water, and performing ultrasonic oscillation and stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step two: adding an organic solvent with the same amount as the deionized water in the step one into the nano-cellulose aqueous solution prepared in the step one for centrifugal replacement, removing water in the nano-cellulose aqueous solution through replacement to obtain an organic solvent solution of the nano-cellulose, and then carrying out ultrasonic oscillation and stirring until the nano-cellulose is uniformly dispersed into the organic solvent;
step three: and (3) adding a thermosetting polymer into the organic solvent solution prepared in the second step, fully mixing by ultrasonic oscillation and stirring to obtain a uniformly distributed mixed solution, regulating the temperature to be between 70 and 80 ℃, and recovering all the organic solvent through reduced pressure distillation to prepare the nano-cellulose polymer composite modifier.
Preferably, the matrix asphalt is various grades of road petroleum asphalt, and the grade selection of the asphalt is mainly determined according to the regional climate conditions and the use requirements of the pavement.
Preferably, the stabilizer is a stabilizer commonly used in the market, such as sulfur complex and the like.
Preferably, the thermoplastic polymer is selected from one or more of SBS polymer, SBR polymer. The SBS polymer is a linear or star-shaped styrene-butadiene block copolymer which is common on the market. The amount of SBS polymer is determined by the performance test of the composite modified asphalt material, and preferably 4-6 parts by weight is used in the invention. The SBR polymer is asphalt modifier SBR rubber which is commonly used in the market, can adopt SBR block agent, powder agent or emulsion agent, and can omit the preparation process of SBR emulsion in the following preparation steps if SBR latex purchased in the market is adopted. The amount of the SBR modifier is determined by a performance test of the composite modified asphalt material, and preferably 2 to 3 parts by weight is used in the invention.
Preferably, the nanocellulose is selected from one or more of wood pulp nanocellulose, sisal nanocellulose, TEMPO oxidized wood pulp nanocellulose and lignin nanocellulose. Wherein TEMPO is 2, 6-tetramethylpyridin-1-oxyl. TEMPO-oxidized wood pulp nanocellulose is preferred for the present invention and the examples are also illustrated by way of example.
Preferably, the emulsifier is a mixture of a cationic emulsifier commonly available in the market and a nonionic surfactant, such as a mixture of a quaternary ammonium salt cationic emulsifier and alkylphenol ethoxylates. The amount of the emulsifier is determined by experiment on the basis of sufficient emulsification of the polymer, and is preferably 0.2 to 0.4 part.
Preferably, the low boiling point organic solution in the preparation process is selected from one or more of cyclohexane-ethyl acetate, cyclohexane, n-hexane, toluene, benzene, methyl ethyl ketone, ethyl acetate, dichloroethane and solvent oil, and the organic solvent is a carrier for dissolving the polymer, and the amount thereof is determined by experiment as long as the polymer is sufficiently dissolved, and is preferably 2.5-3.5 times of the weight of the polymer. The invention preferably selects a mixture of cyclohexane and ethyl acetate, and the mixing ratio of the mixture is preferably cyclohexane: ethyl acetate = 2.
The water in the preparation process is deionized water. A portion is a dispersion liquid prepared from a polymer emulsion, which is based on a polymer in an amount determined experimentally on the basis of the amount of the well-dispersed polymer, preferably 2 to 3 times the weight of the polymer. The other part of water is a medium for dispersing the nano-cellulose, and the amount of the other part of water is determined by tests by taking the nano-cellulose to be fully dispersed as the original, and is preferably 80 to 100 times of the weight part of the nano-cellulose.
Preferably, the organic solvent is selected from one or a mixture of toluene, xylene, absolute ethyl alcohol, butanol, methyl ethyl ketone, cyclohexanone, acetone or ether alcohol solvents. The organic solvent is the carrier of the polymer solution and is determined experimentally in order to adequately dissolve the polymer. In the present invention, absolute ethyl alcohol is preferred, and the amount of the absolute ethyl alcohol is preferably 2 to 3 times the weight of the thermosetting resin.
Preferably, the curing agent is a curing agent commonly used in the market, such as acid anhydrides (methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, or the like) and the like.
Preferably, the thermosetting resin is in a form of liquid resin at room temperature and is selected from one or more of epoxy resin and furan resin, and the addition amount of the thermosetting resin is determined by a performance test of the composite modified asphalt material. In the present invention, liquid bisphenol A type epoxy resin E51 is preferred, and 47 to 78 parts is preferred.
Optionally, a fine steel wire mesh or geotextile is arranged in the first waterproof layer and the second waterproof layer.
Optionally, the cement-asphalt composite structure layer is formed by compounding a cement concrete layer and an asphalt mixture layer embedded and extruded into the cement concrete layer.
Optionally, a layer of asphalt binder oil is sprayed on the contact surface between the cement concrete layer and the asphalt mixture layer.
Optionally, the asphalt surface layer is made of SMA asphalt mastic mixture or continuous graded AC asphalt mixture or open graded OGFC asphalt mixture according to the use requirement, and preferably, the thickness of the asphalt surface layer is 3-6 cm.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the embodiment, the composite structure layer is formed by mutually embedding the cement concrete and the asphalt mixture from the road surface structure, so that the advantages of strong bearing and anti-shearing capacity of the cement concrete rigid road surface are exerted, and the condition is created for strong combination with the asphalt surface layer, so that the characteristics of good travelling comfort and low noise of the flexible road surface are shown. Meanwhile, the two are embedded together from the structure and mutually restrained, so that the lower-level slippage and deformation damage under the load action can be avoided, and the possibility of early pavement damage is reduced. Moreover, because the cement concrete and the asphalt mixture are embedded together from the structure, the asphalt mixture has small deformation and is not easy to fatigue and age, and the service life of the asphalt pavement is greatly prolonged. Therefore, the invention has important significance for prolonging the service life of the asphalt road.
Meanwhile, the waterproof layers of the application all adopt nanocellulose, thermoplastic and thermosetting synergistic modified emulsified asphalt slurry, and by utilizing the advantages of the modified asphalt in the aspects of strength, toughness, viscosity and the like, on one hand, stress can be released to reduce or eliminate the influence of roadbed cracking on the road surface and reduce the possibility of road surface diseases. On the other hand, the water damage caused by underwater seepage is also effectively prevented.
According to the method, the nano-cellulose polymer composite modifier is prepared firstly, so that the agglomeration phenomenon generated when the nano-cellulose material is directly added into the asphalt material is avoided, the uniform dispersion of the nano-cellulose in the asphalt material is facilitated, and the comprehensive performance of the composite modified asphalt pavement can be greatly improved by utilizing the excellent mechanical property and strong adsorption capacity of the nano-cellulose material. The physical and chemical composite modification of the nano-cellulose and the thermoplastic and thermosetting polymers is adopted, so that the advantages of the nano-cellulose and the thermoplastic and thermosetting polymers can be comprehensively exerted, and the performance indexes of the asphalt material, such as strength, high-temperature stability, fatigue, low-temperature cracking and the like, are effectively improved. The method for preparing the nano-cellulose polymer composite modifier independently is suitable for long-distance transportation, does not change the production process and production equipment of the modified asphalt, and is convenient to construct, so that the method has a very wide application prospect in the aspect of road construction.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic cross-sectional structure diagram of an asphalt pavement structure according to an exemplary embodiment.
FIG. 2 is a schematic illustration of a cement concrete layer three-dimensional structure according to an exemplary embodiment.
The reference numerals in the figures are: 1. a road bed layer; 2. a first waterproof layer; 3. a reinforcing mesh; 4. a cement concrete layer; 5. an asphalt mixture layer; 6. a cement-asphalt composite structural layer; 7. a second waterproof layer; 8. and (5) an asphalt surface layer.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if," as used herein, may be interpreted as "at \8230; \8230when" or "when 8230; \823030when" or "in response to a determination," depending on the context.
Referring to fig. 1 and 2, the present embodiment provides an asphalt pavement structure, which may include a road bed layer 1, a first waterproof layer 2, a cement-asphalt composite structure layer 6, a second waterproof layer 7, and an asphalt surface layer 8 from bottom to top, where the cement-asphalt composite structure layer 6 is mainly composed of a cement concrete layer 4 and an asphalt mixture layer 5 embedded into the cement concrete layer 4, and a reinforcing mesh 3 is laid in the bottom of the cement concrete layer 4.
According to the embodiment, the cement concrete and asphalt mixture are embedded into each other to form the composite structure layer 6 starting from the pavement structure, so that the advantages of strong bearing and anti-shearing capacity of the cement concrete rigid pavement are exerted, and the condition is created for strong combination with the asphalt surface layer 8, so that the characteristics of good travelling comfort and low noise of the flexible pavement are expressed. Meanwhile, the two are embedded together from the structure and mutually restrained, so that the lower-level slippage and deformation damage under the load action can be avoided, and the possibility of early pavement damage is reduced. Moreover, because the cement concrete and the asphalt mixture are structurally embedded together, the asphalt mixture has small deformation and is not easy to fatigue and age, and the service life of the asphalt pavement is greatly prolonged. Therefore, the invention has important significance for prolonging the service life of the asphalt road. The cement-asphalt composite structure pavement can be directly used for roads with medium traffic and light traffic grades.
In this embodiment, a second waterproof layer 7 and an asphalt surface layer 8 are further laid on the cement-asphalt composite structure layer 6, and the cement-asphalt composite structure layer is used as a road surface wearing layer and can be used for roads of high-grade and heavy traffic grade.
In this embodiment, the base course 1 is laid on the ground, and a semi-rigid or rigid base course which is conventional in the current asphalt pavement may be used.
In this embodiment, the first waterproof layer 2 and the second waterproof layer 7 both adopt nanocellulose, thermoplastic, thermosetting synergistic modified emulsified asphalt slurry, and utilize advantages of the modified asphalt in properties such as strength, toughness, and viscosity to release stress so as to reduce or eliminate influence of subgrade cracking on a road surface and reduce possibility of occurrence of road surface diseases. Meanwhile, water damage caused by underwater seepage is prevented.
In order to prevent the asphalt from aging and cracking, a fine steel wire mesh or geotextile can be arranged in the waterproof layer. The construction method is that the emulsified asphalt, the aggregate meeting the grading, water, filler and additive are mixed into slurry mixture according to a certain design proportion, and the slurry mixture is uniformly filled into the fine steel wire mesh or is uniformly mixed with the geotextile and is paved on the pavement structure, and the slurry mixture is firmly combined with the pavement structure layer respectively through the processes of coating, demulsification, water separation, evaporation, solidification and the like, so that a good waterproof effect is achieved.
Referring to fig. 1 and 2, the cement-asphalt composite structure layer 6 mainly comprises a cement concrete layer 4 and an asphalt mixture layer 5 embedded into the cement concrete layer 4, and a reinforcing mesh 3 is laid in the bottom of the cement concrete layer 4.
Specifically, the cement concrete layer 4 is provided with a groove structure, the three-dimensional structure of the groove structure is shown in fig. 2, a square groove structure is shown in fig. 2, and two sides of the bottom of the groove structure are provided with 45-degree triangular chamfers.
This structure can transmit lateral stresses to the cement concrete layer 4 and facilitate the embedded compaction of the bituminous mixture layer 5. In the process of vehicle acceleration or sudden braking, the bearing capacity of the asphalt concrete embedded and extruded in the groove structure is determined by the cement concrete, so that the deformation and damage of the track can be prevented; because the cement concrete-asphalt embedded and extruded structure is not easy to slide between layers, the damage of pavement waves and a dense package is avoided. The depth of the groove structure is 2-8 cm, preferably less than 1/3 of the total height of the cement concrete layer. To ensure that the vehicle load and shear stress can be carried mostly by the cement concrete structure, the width of the groove structure must be smaller than the width of the wheel. According to the standard GB T2978-2008 < specification, size, air pressure and load of passenger car tires > issued by the State administration of quality supervision, inspection and quarantine of the people's republic of China in 2008, the narrowest width of the passenger car tire is 135mm. Therefore, the width of the groove structure in this embodiment should be less than 13.5cm, preferably 1-13.5 cm, more preferably 5-6 cm, and can be determined by combining the road surface condition and the construction condition. Meanwhile, in order to ensure the stable bearing stress of the cement concrete layer 4, the total height of the layer is 4-30 cm, preferably 9-10 cm.
The bearing and the good embedding and extruding effects of the asphalt and the cement concrete are comprehensively considered, the width of the boss of the cement concrete layer 4 is required to be close to the width of the groove, preferably 5-6 cm, and the cement concrete layer can be adjusted by combining the condition of the road surface and the construction condition. In order to enhance the crack resistance of the cement concrete layer 4, a reinforcing mesh 3 is laid in the base. In order to strengthen the bonding with the asphalt mixture, a layer of asphalt bond coat oil is sprayed on the surface of the cement concrete layer 4.
The asphalt mixture in the asphalt mixture layer 5 is preferably AC asphalt mixture. The asphalt mixture layer 5 is embedded and extruded in the groove structure of the concrete layer, and the upper surface of the asphalt mixture layer 5 is required to be 0.5-1 cm higher than the upper surface of the cement concrete layer 4, so that paving and rolling construction are facilitated.
The asphalt surface layer 8 is made of SMA asphalt mastic mixture or continuous gradation AC asphalt mixture or open gradation OGFC asphalt mixture according to the use requirement, and the thickness of the asphalt surface layer 8 is 3-6 cm.
The pavement structure of this embodiment has synthesized the advantage of rigid pavement and flexible road surface to the concrete layer bears the main load, has reduced the emergence of road surface disease with low-cost mode.
Example 1:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: adding 4 parts of SBS polymer into 12 parts of low-boiling-point organic solvent (the organic solvent is a mixture of hexane and ethyl acetate, the mixing ratio is cyclohexane: ethyl acetate =2: 8-5. Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain polymer emulsion;
step two: adding 0.5 part of TEMPO oxidized wood pulp nano-cellulose into 50 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the polymer emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until the water is completely evaporated to prepare the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and C, crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 4.7 parts of nano-cellulose thermoplastic polymer composite modifier, and shearing at a high speed by using a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.1 part of stabilizer into the asphalt material prepared in the step one, and stirring or shearing until the stabilizer is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 1 part of emulsifier into 100 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 104.8 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 170 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and adding 47 parts of thermosetting resin into the asphalt emulsion prepared in the step three, uniformly mixing, and finally adding 14 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 2:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: adding 6 parts of SBS polymer into 18 parts of low-boiling-point organic solvent (the organic solvent is a mixture of hexane and ethyl acetate, the mixing ratio is cyclohexane: ethyl acetate =2: 8-5). Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer emulsion;
step two: adding 3 parts of TEMPO oxidized wood pulp nano-cellulose into 300 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until the water is completely evaporated to prepare the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and (4) crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 9.4 parts of nano-cellulose thermoplastic polymer composite modifier, and shearing at a high speed by using a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (4) adding 0.3 part of stabilizer into the asphalt material prepared in the first step, and stirring or shearing until the stabilizer is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 4 parts of emulsifier into 400 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 109.7 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 185 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and (4) adding 78 parts of thermosetting resin into the asphalt emulsion prepared in the third step, uniformly mixing, and finally adding 30 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 3:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: adding 5 parts of SBS polymer into 15 parts of low-boiling-point organic solvent (the organic solvent is a mixture of hexane and ethyl acetate, the mixing ratio is cyclohexane: ethyl acetate =2: 8-5. Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer emulsion;
step two: adding 2 parts of TEMPO oxidized wood pulp nano-cellulose into 200 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until the water is completely evaporated to prepare the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and (4) crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 7.3 parts of nano-cellulose thermoplastic polymer composite modifier, and shearing at a high speed by using a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.2 part of stabilizer into the asphalt material prepared in the first step, and stirring or shearing until the stabilizer is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 2.5 parts of emulsifier into 250 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 107.5 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 178 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and (3) adding 62 parts of thermosetting resin into the asphalt emulsion prepared in the third step, uniformly mixing, and finally adding 22 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 4:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: after 2 parts of SBR polymer was added to 6 parts of a low boiling point organic solvent (the organic solvent was a mixture of hexane and ethyl acetate in a mass ratio of cyclohexane: ethyl acetate =2 to 5). Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer emulsion;
step two: adding 0.5 part of TEMPO oxidized wood pulp nano-cellulose into 50 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to obtain the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and C, crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 2.7 parts of nano-cellulose polymer composite modifier, and shearing at a high speed by a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.1 part of stabilizer into the asphalt material prepared in the step one, and stirring or shearing until the stabilizer is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 1 part of emulsifier into 100 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 102.8 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 170 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and (4) adding 47 parts of thermosetting resin into the asphalt emulsion prepared in the third step, uniformly mixing, and finally adding 14 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material synergistically modified by nano cellulose, thermoplastic and thermosetting.
Example 5:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: 3 parts of SBR polymer is added into 9 parts of low boiling point organic solvent (the organic solvent is a mixture of hexane and ethyl acetate, the mixing ratio is cyclohexane: ethyl acetate =2: 8-5). Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer emulsion;
step two: adding 3 parts of TEMPO oxidized wood pulp nanocellulose into 300 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nanocellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to obtain the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and C, crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 6.4 parts of nano-cellulose thermoplastic polymer composite modifier, and shearing at a high speed by using a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.3 part of stabilizer into the asphalt material prepared in the step one, and stirring or shearing until the mixture is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 4 parts of emulsifier into 400 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 106.7 parts of nano-cellulose thermoplastic polymer composite modified thermoplastic asphalt material to 185 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer composite modified asphalt emulsion;
step four: and (3) adding 78 parts of thermosetting resin into the asphalt emulsion prepared in the step three, uniformly mixing, and finally adding 30 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 6:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: after 2.5 parts of SBR polymer was added to 7.5 parts of a low boiling point organic solvent (a mixture of hexane and ethyl acetate in a mass ratio of cyclohexane: ethyl acetate =2:8 to 5) and sufficiently dissolved, 7.5 parts of deionized water was slowly added to the SBR organic solution, followed by 0.3 part of an emulsifier. Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer emulsion;
step two: adding 2 parts of TEMPO oxidized wood pulp nanocellulose into 200 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nanocellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to obtain the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and (4) crushing the raw material of the nano-cellulose polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 4.8 parts of nano-cellulose polymer composite modifier, and shearing at a high speed by a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.2 part of stabilizer into the asphalt material prepared in the step one, and stirring or shearing until the mixture is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 2.5 parts of emulsifier into 250 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 105 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 178 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and (4) adding 62 parts of thermosetting resin into the asphalt emulsion prepared in the third step, uniformly mixing, and finally adding 22 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 7:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: adding 2 parts of SBR polymer and 4 parts of SBS polymer into 18 parts of low-boiling-point organic solvent (the organic solvent is a mixture of hexane and ethyl acetate, the mixing ratio is cyclohexane: ethyl acetate =2: 8-5), after fully dissolving, slowly adding 18 parts of deionized water into the polymer organic solution, and then adding 0.2 part of emulsifier. Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer mixed emulsion;
step two: adding 0.5 part of TEMPO oxidized wood pulp nano-cellulose into 50 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer mixed emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to obtain the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and C, crushing the raw material of the nano-cellulose polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 6.7 parts of nano-cellulose polymer composite modifier, and shearing at a high speed by a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.1 part of stabilizer into the asphalt material prepared in the step one, and stirring or shearing until the stabilizer is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 1 part of emulsifier into 100 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 106.8 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 170 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and adding 47 parts of thermosetting resin into the asphalt emulsion prepared in the step three, uniformly mixing, and finally adding 14 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 8:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: 3 parts of an SBR polymer and 6 parts of an SBS polymer are added into 27 parts of a low-boiling-point organic solvent (the organic solvent is a mixture of hexane and ethyl acetate, the mixing ratio is cyclohexane to ethyl acetate = 2. Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer mixed emulsion;
step two: adding 3 parts of TEMPO oxidized wood pulp nanocellulose into 300 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nanocellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer mixed emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to obtain the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and C, crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 12.4 parts of nano-cellulose thermoplastic polymer composite modifier, and shearing at a high speed by using a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (4) adding 0.3 part of stabilizer into the asphalt material prepared in the first step, and stirring or shearing until the stabilizer is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 4 parts of emulsifier into 400 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 112.7 parts of thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer to 185 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer compositely modified asphalt emulsion;
step four: and (3) adding 78 parts of thermosetting resin into the asphalt emulsion prepared in the step three, uniformly mixing, and finally adding 30 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 9:
(1) Preparing a nano-cellulose thermoplastic polymer composite modifier:
the method comprises the following steps: after 2.5 parts of SBR polymer and 5 parts of SBS polymer were added to 22.5 parts of a low boiling point organic solvent (a mixture of hexane and ethyl acetate in a mass ratio of cyclohexane: ethyl acetate =2:8 to 5) and sufficiently dissolved, 22.5 parts of deionized water was slowly added to the polymer organic solution, followed by 0.3 part of an emulsifier. Shearing on a high-speed emulsification shearing machine until full emulsification is achieved, and then removing the organic solution through reduced pressure distillation to obtain a thermoplastic polymer mixed emulsion;
step two: adding 2 parts of TEMPO oxidized wood pulp nano-cellulose into 200 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: slowly adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer mixed emulsion prepared in the step one, and fully shearing by using a high-speed emulsification shearing machine to obtain a uniform mixed solution of the polymer and the nano-cellulose; and demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to obtain the nano-cellulose thermoplastic polymer composite modifier raw material.
Step four: and C, crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three into a finished product of the granular nano-cellulose thermoplastic polymer composite modifier by using a crusher.
(2) The preparation method of the thermoplastic asphalt material compositely modified by the nano-cellulose thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating 100 parts of matrix asphalt to a flowing state, adding 9.8 parts of nano-cellulose thermoplastic polymer composite modifier, and shearing at a high speed by using a shearing machine to ensure that the modifier is uniformly dispersed;
step two: and (3) adding 0.2 part of stabilizer into the asphalt material prepared in the step one, and stirring or shearing until the mixture is uniformly dispersed to obtain the thermoplastic asphalt material compositely modified by the nano-cellulose and the thermoplastic polymer.
(3) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: adding 2.5 parts of emulsifier into 250 parts of deionized water, and uniformly stirring to obtain an emulsifier aqueous solution;
step two: heating 110 parts of nano-cellulose thermoplastic polymer composite modified thermoplastic asphalt material to 178 ℃ to be in a flowing state, then adding the prepared emulsifier aqueous solution into asphalt, and shearing and stirring by using a shearing machine to obtain nano-cellulose thermoplastic polymer composite modified asphalt emulsion;
step four: and (4) adding 62 parts of thermosetting resin into the asphalt emulsion prepared in the third step, uniformly mixing, and finally adding 22 parts of curing agent, and uniformly mixing to obtain the emulsified asphalt material modified by the cooperation of nano cellulose, thermoplastic and thermosetting.
Example 10:
(1) Preparing a nanocellulose thermosetting polymer composite modifier:
the method comprises the following steps: adding 0.5 part of nano-cellulose into 50 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step two: adding 50 parts of absolute ethyl alcohol into the nano-cellulose aqueous solution prepared in the step one for centrifugal replacement, and removing water in the nano-cellulose aqueous solution through the replacement to obtain an ethanol solution of nano-cellulose; then ultrasonic oscillation and magnetic stirring are carried out until the nano-cellulose is uniformly dispersed into the ethanol solution.
Step three: adding 47 parts of epoxy resin into the solution prepared in the step two, and obtaining a mixed solution with uniformly distributed components by utilizing ultrasonic oscillation and magnetic stirring; regulating the temperature to 70 ℃, and recovering all ethanol through reduced pressure distillation to prepare the nano-cellulose thermosetting polymer composite modifier.
(2) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: heating 100 parts of base asphalt to 160 ℃, adding 4 parts of SBS polymer and 0.1 part of stabilizer, heating to 170 ℃, fully stirring and grinding to obtain a thermoplastic modified asphalt material, and maintaining the temperature at 170 ℃;
step two: adding 1 part of emulsifier into 100 parts of water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: adding the emulsifier aqueous solution prepared in the step two into the thermoplastic modified asphalt material prepared in the step one, and shearing and stirring by using a shearing machine to obtain thermoplastic modified emulsified asphalt;
step four: and adding 47.5 parts of nano-cellulose thermosetting polymer composite modifier into the emulsified asphalt prepared in the step three, uniformly mixing, and finally adding 14 parts of curing agent, and uniformly mixing to obtain the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material.
Example 11:
(1) Preparing a nano-cellulose thermosetting polymer composite modifier:
the method comprises the following steps: adding 3 parts of nano-cellulose into 300 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step two: adding 300 parts of absolute ethyl alcohol into the nano-cellulose aqueous solution prepared in the first step for centrifugal replacement, and removing water in the solution through replacement to obtain an ethanol solution of nano-cellulose; then ultrasonic oscillation and magnetic stirring are carried out until the nano-cellulose is uniformly dispersed into the ethanol solution.
Step three: adding 78 parts of epoxy resin into the solution prepared in the second step, and obtaining a mixed solution with all components uniformly distributed by utilizing ultrasonic oscillation and magnetic stirring; regulating the temperature to 80 ℃, and recovering all ethanol through reduced pressure distillation to prepare the nano-cellulose thermosetting polymer composite modifier.
(2) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: heating 100 parts of matrix asphalt to 160 ℃, adding 6 parts of SBS polymer and 0.3 part of stabilizer, heating to 185 ℃, fully stirring and grinding to obtain a thermoplastic modified asphalt material, and maintaining the temperature at 185 ℃;
step two: adding 4 parts of emulsifier into 400 parts of water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: adding the emulsifier aqueous solution prepared in the step two into the thermoplastic modified asphalt material prepared in the step one, and shearing and stirring by using a shearing machine to obtain thermoplastic modified emulsified asphalt;
step four: and C, adding 81 parts of nano-cellulose thermosetting polymer composite modifier into the emulsified asphalt prepared in the step three, uniformly mixing, and finally adding 30 parts of curing agent, and uniformly mixing to obtain the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material.
Example 12:
(1) Preparing a nano-cellulose thermosetting polymer composite modifier:
the method comprises the following steps: adding 2 parts of nano-cellulose into 200 parts of deionized water, and performing ultrasonic oscillation and magnetic stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step two: adding 200 parts of absolute ethyl alcohol into the nano-cellulose aqueous solution prepared in the first step for centrifugal replacement, and removing water in the solution through replacement to obtain an ethanol solution of nano-cellulose; then ultrasonic oscillation and magnetic stirring are carried out until the nano-cellulose is uniformly dispersed into the ethanol solution.
Step three: adding 62 parts of epoxy resin into the solution prepared in the second step, and obtaining a mixed solution with uniformly distributed components by utilizing ultrasonic oscillation and magnetic stirring; regulating the temperature to 75 ℃, and recovering all ethanol through reduced pressure distillation to prepare the nano-cellulose thermosetting polymer composite modifier.
(2) Preparing the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material:
the method comprises the following steps: heating 100 parts of matrix asphalt to 160 ℃, adding 6 parts of SBS polymer and 0.3 part of stabilizer, heating to 178 ℃, fully stirring and grinding to obtain a thermoplastic modified asphalt material, and maintaining the temperature at 178 ℃;
step two: adding 2.5 parts of emulsifier into 250 parts of water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: adding the emulsifier aqueous solution prepared in the step two into the thermoplastic modified asphalt material prepared in the step one, and shearing and stirring by using a shearing machine to obtain thermoplastic modified emulsified asphalt;
step four: and C, adding 64 parts of nano-cellulose thermosetting polymer composite modifier into the emulsified asphalt prepared in the step three, uniformly mixing, and finally adding 22 parts of curing agent, and uniformly mixing to obtain the nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material.
The embodiment adopts physical strengthening and chemical modification, comprehensively exerts the excellent mechanical properties of the nano-cellulose material and the excellent high and low temperature stability, super-strong cohesiveness and fatigue resistance of the thermoplastic polymer and the thermosetting polymer in cooperation with the chemical modification, and greatly improves the comprehensive properties of the asphalt to meet the requirements of pavement use.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the preparation method, the types, the quality and the adding sequence of the components, the types and the quality of the organic solvent and the amount of deionized water in the preparation process, the temperature in the preparation process, the types of the shearing/stirring/mixing equipment, the shearing/stirring/mixing time and the like can be changed in various ways. However, the synergistic modification of the emulsified asphalt material or asphalt mixture by nanocellulose, thermoplastic and thermosetting and the preparation method are within the spirit and principle of the present invention and are within the protection scope of the present invention.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (3)
1. An asphalt pavement structure comprises a road base layer, a first waterproof layer, a cement-asphalt composite structure layer, a second waterproof layer and an asphalt surface layer from bottom to top in sequence;
the cement concrete layer is provided with a square groove structure, and the cement-asphalt composite structure layer is formed by compounding a cement concrete layer and an asphalt mixture layer embedded and extruded into the cement concrete layer;
the first waterproof layer and the second waterproof layer are respectively made of emulsified asphalt modified by synergy of nano-cellulose, thermoplastic and thermosetting, and the preparation method of the emulsified asphalt modified by synergy of nano-cellulose, thermoplastic and thermosetting comprises the following steps:
the method comprises the following steps: preparing a thermoplastic asphalt material compositely modified by nano-cellulose and a thermoplastic polymer;
step two: adding an emulsifier into water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: heating the modified asphalt prepared in the first step to 170-185 ℃ to be in a flowing state, then adding the emulsifier aqueous solution prepared in the second step into the asphalt, and shearing and stirring by using a shearing machine to obtain nano cellulose polymer composite modified asphalt emulsion;
step four: adding a thermosetting polymer into the asphalt emulsion prepared in the third step, uniformly mixing, and finally adding a curing agent, and uniformly mixing to obtain a nano-cellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material;
the preparation method of the thermoplastic asphalt material compositely modified by the nanocellulose and the thermoplastic polymer comprises the following steps:
the method comprises the following steps: heating the matrix asphalt to a flowing state, adding the nano-cellulose thermoplastic polymer composite modifier, and fully stirring or shearing to uniformly disperse to obtain a premixed asphalt material;
step two: adding a stabilizer into the premixed asphalt material prepared in the first step, and fully stirring or shearing the mixture until the mixture is uniformly dispersed to obtain a thermoplastic asphalt material compositely modified by the nanocellulose and the thermoplastic polymer;
the preparation method of the nano-cellulose thermoplastic polymer composite modifier comprises the following steps:
the method comprises the following steps: adding a thermoplastic polymer into a low-boiling-point organic solvent, fully dissolving, adding deionized water, then adding an emulsifier for emulsification, and then carrying out reduced pressure distillation to recover an organic solution to obtain a polymer emulsion;
step two: adding nano-cellulose into deionized water, and performing ultrasonic oscillation and stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step three: adding the nano-cellulose aqueous solution prepared in the step two into the thermoplastic polymer emulsion prepared in the step one, and shearing to obtain a uniform mixed solution of the polymer and the nano-cellulose; demulsifying, centrifugally separating, and distilling under reduced pressure until water is completely evaporated to prepare a nano-cellulose thermoplastic polymer composite modifier raw material;
step four: crushing the raw material of the nano-cellulose thermoplastic polymer composite modifier prepared in the step three to obtain the nano-cellulose thermoplastic polymer composite modifier;
or the preparation method of the nanocellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt comprises the following steps:
the method comprises the following steps: heating the matrix asphalt to 160 ℃, adding a thermoplastic polymer and a stabilizer, heating to 170-185 ℃, fully stirring and grinding to obtain a thermoplastic modified asphalt material, and maintaining the temperature at 170-185 ℃;
step two: adding an emulsifier into water, and uniformly stirring to obtain an emulsifier aqueous solution;
step three: adding the emulsifier aqueous solution prepared in the step two into the thermoplastic modified asphalt material prepared in the step one, and shearing and stirring by using a shearing machine to obtain thermoplastic modified emulsified asphalt;
step four: preparing a nano-cellulose thermosetting polymer composite modifier;
step five: adding the nanocellulose thermosetting polymer composite modifier prepared in the fourth step into the emulsified asphalt prepared in the third step, uniformly mixing, and finally adding a curing agent, and uniformly mixing to obtain a nanocellulose, thermoplastic and thermosetting synergistically modified emulsified asphalt material;
the preparation method of the nano-cellulose thermosetting polymer composite modifier comprises the following steps:
the method comprises the following steps: adding nano-cellulose into deionized water, and performing ultrasonic oscillation and stirring treatment to obtain a uniformly dispersed nano-cellulose aqueous solution;
step two: adding an organic solvent with the same amount as the deionized water in the step one into the nano-cellulose aqueous solution prepared in the step one for centrifugal replacement, removing water in the nano-cellulose aqueous solution through replacement to obtain an organic solvent solution of the nano-cellulose, and then carrying out ultrasonic oscillation and stirring until the nano-cellulose is uniformly dispersed into the organic solvent;
step three: and (3) adding a thermosetting polymer into the organic solvent solution prepared in the second step, fully mixing by utilizing ultrasonic oscillation and stirring to obtain a uniformly distributed mixed solution, regulating and controlling the temperature to be 70-80 ℃, and recovering all the organic solvent through reduced pressure distillation to prepare the nano-cellulose thermosetting polymer composite modifier.
2. An asphalt pavement structure as defined in claim 1, wherein said base course is laid on the ground with a semi-rigid or rigid base course as in the current asphalt pavement.
3. An asphalt pavement structure according to claim 1, wherein the first and second waterproof layers are provided with fine steel wire mesh or geotextile.
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| CN109233636B (en) * | 2018-07-27 | 2021-06-29 | 徐州卧牛山新型防水材料有限公司 | Water-emulsion type epoxy asphalt coating and preparation method thereof |
| CN109763397B (en) * | 2019-03-11 | 2024-04-26 | 广东智铭设计有限公司 | Asphalt pavement with embedded structure and construction method |
| CN110564168B (en) * | 2019-09-10 | 2021-06-22 | 长沙理工大学 | Modified asphalt material and preparation method thereof |
| CN210975412U (en) * | 2019-10-31 | 2020-07-10 | 湖州丰汇交通工程有限公司 | Hot-pressing type asphalt concrete pavement structure |
| CN110804318A (en) * | 2019-12-09 | 2020-02-18 | 江苏中路交通科学技术有限公司 | High-strength emulsified asphalt and preparation method thereof |
| CN111334058A (en) * | 2020-04-27 | 2020-06-26 | 海娇 | Water-based epoxy emulsified asphalt and preparation method thereof |
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