CN106995302B - High-performance mixture and construction method thereof - Google Patents
High-performance mixture and construction method thereof Download PDFInfo
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- CN106995302B CN106995302B CN201710303728.5A CN201710303728A CN106995302B CN 106995302 B CN106995302 B CN 106995302B CN 201710303728 A CN201710303728 A CN 201710303728A CN 106995302 B CN106995302 B CN 106995302B
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
A high-performance mixture and a construction method thereof are disclosed, wherein the high-performance mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 4% -11%; aggregate: 78% -92%; cement: 4% -11%; the epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35-50: 50. The invention solves the technical problem that the asphalt mixture used in the prior construction can not simultaneously meet the high-temperature deformation resistance, crack resistance, waterproof performance and durability of the designed pavement.
Description
Technical Field
The invention relates to the field of high-performance road surface engineering of highways, in particular to a mixture of a high-performance road surface and a construction method thereof.
Background
Asphalt concrete and cement concrete are the most widely used pavement materials, and epoxy resin materials are also commonly used in specific structures and pavement engineering. However, as is well known, asphalt concrete is flexible, good in crack resistance, good in waterproof performance and good in durability, but the high-temperature resistance stability is often insufficient, and the bonding performance is not high enough; the anti-cracking performance and the high-temperature deformation resistance of the rubber are better than those of asphalt, so that the performance of the asphalt can be further improved; the epoxy resin mortar has the characteristics of high strength and high bonding force, but has high rigidity, easy brittle fracture, insufficient ageing resistance, easy water damage and poor durability; the cement concrete has high compression strength and good durability, but has low tensile strength, weak deformation resistance, easy cracking and low bonding force with an interface. Epoxy asphalt concrete combining asphalt with epoxy resin and epoxy concrete or epoxy mortar combining cement with epoxy resin also appear in the present construction, but practice shows that the performance of the epoxy asphalt concrete or epoxy mortar can not meet the engineering requirements, especially the problems of cracking and water damage and has poor durability.
The invention adopts emulsification and mixing technical means, fuses the material characteristics of asphalt, rubber SBS or rubber SBR, epoxy resin and cement, fully exerts the performance advantages of various materials, overcomes disadvantages, synthesizes a novel high-performance and durable mixture, paves special road surfaces through normal paving and rolling processes, and meets the requirements of special road surface engineering with harsh stress conditions and maintenance and repair thereof, such as paving of long steep slope road surfaces, bus station road surfaces, urban intersections, sharp-turn road sections, steel bridge surfaces and the like.
Disclosure of Invention
The invention provides a high-performance mixture, a construction method thereof and a construction method thereof, and aims to solve the technical problem that the asphalt mixture used in the prior construction cannot simultaneously meet the high-temperature deformation resistance, crack resistance, waterproof performance, adhesive performance and durability of a designed pavement.
The technical scheme of the invention is as follows.
A high-performance mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 4% -11%; aggregate: 78% -92%; cement: 4% -11%; the epoxy emulsified modified asphalt is prepared from emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35-50: 50. Preferably, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 50-70%, and the water content of the emulsified modified asphalt is 30-50%.
Preferably, the solid content of the hydrophilic epoxy resin solution is 50-70% which is the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 30-50%.
Preferably, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether block of polyvinyl alcohol group, nonyl phenol-terminated polyurethane resin, modified fatty amine, phenolic amine, alkylphenol polyethylene oxide; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
Preferably, the aggregate is type a aggregate or type B aggregate; wherein the grading of the A-type aggregate is as follows:
the grading of the B-type aggregate is as follows:
preferably, when the aggregate is A-type aggregate, the weight parts of the components in the mixture are as follows: epoxy emulsified modified asphalt: 8% -11%, aggregate: 78% -87%, cement: 6 to 11 percent; when the aggregate is B-type aggregate, the weight parts of the components in the mixture are as follows: epoxy emulsified modified asphalt: 5% -7%, aggregate: 87% -92%, cement: 4 to 6 percent.
A construction method of a high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps.
Step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 50-70%, and the water content of the emulsified modified asphalt is 30-50%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 50-70% which is the same as that of the emulsified and modified asphalt, and the water content is 30-50%.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35-50: 50.
And step B, adding 4-11 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 78-92 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 4-11% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; and finishing the preparation process of the high-performance mixture. Step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
Preferably, in the first step, the aggregate is type A aggregate or type B aggregate; wherein the grading of the A-type aggregate is as follows:
the grading of the B-type aggregate is as follows:
preferably, when the aggregate is A-type aggregate, the weight parts of the epoxy emulsified modified asphalt in the step B are 8-11%, the weight parts of the aggregate are 78-87%, and the weight parts of the cement in the step C are 6-11%; when the aggregate is B-type aggregate, the weight parts of the epoxy emulsified modified asphalt in the step B are 5-7%, the weight parts of the aggregate are 87-92%, and the weight parts of the cement in the step C are 4-6%.
Preferably, when the construction pavement has an adjacent pavement, the second step further comprises painting the adjacent pavement of the epoxy emulsified modified asphalt, which is the same as that in the first step.
Compared with the prior art, the invention has the following characteristics and beneficial effects.
1. The mixture has excellent road performance, and the dynamic stability of the mixture is more than 10000 times/mm; the residual stability is more than 90%; the ratio of the freeze-thaw cycle cleavage strength is more than 90%; the breaking strain of a bending test is more than 3000 (mu epsilon) at the temperature of minus 10 ℃ and the loading rate of 50mm/min, after the same epoxy emulsified modified asphalt is used as an interface bonding material, the bonding force between the compacted mixture and a lower bearing layer is more than 2.0MPa (or the tensile strength of a structural layer) at normal temperature, and the bonding force between the compacted mixture and the lower bearing layer is more than 1.0MPa (or the tensile strength of the structural layer) at the temperature of 60 ℃.
2. The invention organically combines the epoxy emulsified modified asphalt and the cement, fully exerts respective performance advantages, overcomes disadvantages, combines a novel high-performance and durable pavement material, greatly improves the pavement performance compared with the prior asphalt pavement, cement pavement and materials synthesized by the asphalt pavement, the cement pavement and the epoxy resin respectively, and can meet the requirements of special pavement and bridge deck engineering with harsh stress conditions.
3. The proportion of the emulsified modified asphalt to the hydrophilic epoxy resin solution in the epoxy emulsified modified asphalt is 65: 35-50: 50, so that various properties of the epoxy emulsified modified asphalt prepared in the later stage are ensured, and waste caused by overhigh solid content in a mixture is avoided.
4. The test of the invention proves that the higher the solid content of the emulsified modified asphalt is, the better the performance of the emulsified modified asphalt is; the higher the solid content of the epoxy resin is, the better the performance of the epoxy resin is; after the two are mixed, the overall performance of the mixture is higher; the emulsified modified asphalt with the solid content of 50-70 percent and the hydrophilic epoxy resin with the solid content being the same as that of the emulsified modified asphalt are adopted to prepare the epoxy emulsified modified asphalt, and the solid contents of the emulsified modified asphalt and the hydrophilic epoxy resin are also controlled within the range of 50-70 percent, so that the solid content proportion of each component is consistent with that of the mixture; the epoxy resin accounts for 35-50% of the total amount of the cured material, so that various performances of the mixture are ensured.
5. The emulsified modified asphalt of the invention is prepared by rubber SBS or rubber SBR modified asphalt, compared with the emulsified asphalt prepared by common heavy traffic asphalt, the emulsified modified asphalt of the invention has the advantages of large viscosity, high strength, difficult dispersion, poor stability of the dispersed particles and easy segregation, and the problems are avoided.
6. Before paving and compacting the high-performance mixture, the epoxy emulsified modified asphalt which is the same as that in the step one is used for coating the lower bearing layer structure, so that the bonding and waterproof performance of a newly paved road surface and the lower bearing layer structure are ensured.
Detailed Description
The invention discloses a high-performance mixture composed of modified epoxy resin and cement and a construction method thereof. As is well known, common asphalt concrete is flexible, good in crack resistance, good in waterproof performance and good in durability, but the high-temperature resistance stability is often insufficient, and the bonding performance is not high enough; the modified asphalt has better crack resistance and high-temperature deformation resistance than asphalt, and can further improve the performance of the asphalt; the epoxy resin mortar has the characteristics of high strength and high bonding force, but has high rigidity, easy brittle fracture, insufficient ageing resistance, easy water damage and poor durability; the cement concrete has high compression strength and good durability, but has low tensile strength, weak deformation resistance and low bonding force with an interface. The invention adopts technical means to compound the modified asphalt, the epoxy resin, the cement and the aggregate with proper gradation to form a novel mixture, fully exerts the superior performance of various materials, overcomes the defects of the materials, ensures that the novel mixture has the excellent road performance, and can be used for road surface and bridge surface engineering with special requirements and maintenance and repair thereof, such as long steep slope road surfaces, bus station road surfaces, urban intersections, sharp-turn road sections, steel bridge surface pavement and the like.
The high-performance mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 4% -11%; aggregate: 85 percent; cement: 11 percent; the epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35-50: 50; the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 50-70%, and the water content of the emulsified modified asphalt is 30-50%.
The solid content of the hydrophilic epoxy resin solution is 50-70% same as that of the emulsified modified asphalt, and the water content of the hydrophilic epoxy resin solution is 30-50%.
The hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether unit of a polyvinyl alcohol group, nonyl phenol-terminated polyurethane resin, modified fatty amine, phenolic amine and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
The cement is ordinary portland cement, the grade is not particularly required, 32.5 or 42.5 grade cement is generally adopted, and the cement dosage must ensure that all water contained in the mixture can be used by the hydration of the cement.
Example 1:
in this embodiment, the aggregate is a type a aggregate, and the grading of the type a aggregate is:
in the embodiment, the mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 8%, aggregate: 81% of cement: 11 percent.
In this embodiment, the epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein a ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 50: 50.
In the embodiment, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 50%, and the water content of the emulsified modified asphalt is 50%.
In this embodiment, the solid content of the hydrophilic epoxy resin solution is 50% the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 50%.
In this embodiment, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether polyol, nonylphenol-terminated polyurethane resin, modified fatty amine, phenol-aldehyde amine, and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
In this embodiment, the cement is ordinary portland cement, no special requirement is made on the grade, and the grade of the cement is generally 32.5 or 42.5, and the cement dosage must ensure that all the water contained in the mixture can be used for hydrating the cement.
The construction method of the high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps.
Step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 50%, and the water content of the emulsified modified asphalt is 50%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 50% which is the same as that of the emulsified and modified asphalt, and the water content is 50%.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 50: 50.
And step B, adding 8 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 81 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 11% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; and finishing the preparation process of the high-performance mixture.
Step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
Example 2:
in this embodiment, the aggregate is a type a aggregate, and the grading of the type a aggregate is as follows.
In the embodiment, the mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 8%, aggregate: 86% of cement: 6 percent.
The epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35.
In the embodiment, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 70%, and the water content of the emulsified modified asphalt is 30%.
In this example, the solid content of the hydrophilic epoxy resin solution is 70% which is the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 30%.
In this embodiment, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, modified fatty amine, and phenol-aldehyde amine; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
In this embodiment, the cement is ordinary portland cement, no special requirement is made on the grade, and the grade of the cement is generally 32.5 or 42.5, and the cement dosage must ensure that all the water contained in the mixture can be used for hydrating the cement.
The construction method of the high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps:
step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 70%, and the water content of the emulsified modified asphalt is 30%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 70 percent which is the same as that of the emulsified and modified asphalt, and the water content is 30 percent.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35.
And step B, adding 8 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 86 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 6% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; the preparation procedure of the high-performance mixture is completed; step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
Example 3:
in this embodiment, the aggregate is a type a aggregate, and the grading of the type a aggregate is as follows.
In the embodiment, the mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 11%, aggregate: 78%, cement: 11 percent.
The epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 60: 45.
In the embodiment, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 60%, and the water content of the emulsified modified asphalt is 40%.
In this embodiment, the solid content of the hydrophilic epoxy resin solution is 60% which is the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 40%.
In this embodiment, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether polyol, nonylphenol-terminated polyurethane resin, modified fatty amine, phenol-aldehyde amine, and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
In this embodiment, the cement is ordinary portland cement, no special requirement is made on the grade, and the grade of the cement is generally 32.5 or 42.5, and the cement dosage must ensure that all the water contained in the mixture can be used for hydrating the cement.
The construction method of the high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps.
Step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 60%, and the water content of the emulsified modified asphalt is 40%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 60 percent which is the same as that of the emulsified and modified asphalt, and the water content is 40 percent.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 60: 45.
And step B, adding 11 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 78 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 11% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; and finishing the preparation process of the high-performance mixture. Step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
Example 4:
in this example, the aggregate is type B aggregate, and the grading of the type B aggregate is as follows.
In the embodiment, the mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 5%, aggregate: 91% and cement: 4 percent.
In this embodiment, the epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein a ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 50: 50.
In the embodiment, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 50%, and the water content of the emulsified modified asphalt is 50%.
In this embodiment, the solid content of the hydrophilic epoxy resin solution is 50% the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 50%.
In this embodiment, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether polyol, nonylphenol-terminated polyurethane resin, modified fatty amine, phenol-aldehyde amine, and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
In this embodiment, the cement is ordinary portland cement, no special requirement is made on the grade, and the grade of the cement is generally 32.5 or 42.5, and the cement dosage must ensure that all the water contained in the mixture can be used for hydrating the cement.
The construction method of the high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps.
Step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 50%, and the water content of the emulsified modified asphalt is 50%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 50% which is the same as that of the emulsified and modified asphalt, and the water content is 50%.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 50: 50.
And step B, adding 5 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 91 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 4% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; and finishing the preparation process of the high-performance mixture.
Step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
Example 5:
in this example, the aggregate is type B aggregate, and the grading of the type B aggregate is as follows.
In the embodiment, the mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 7%, aggregate: 89% of cement: 4 percent.
The epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35.
In the embodiment, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 70%, and the water content of the emulsified modified asphalt is 30%.
In this example, the solid content of the hydrophilic epoxy resin solution is 70% which is the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 30%.
In this embodiment, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether polyol, nonylphenol-terminated polyurethane resin, modified fatty amine, phenol-aldehyde amine, and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
In this embodiment, the cement is ordinary portland cement, no special requirement is made on the grade, and the grade of the cement is generally 32.5 or 42.5, and the cement dosage must ensure that all the water contained in the mixture can be used for hydrating the cement.
The construction method of the high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps.
Step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 70%, and the water content of the emulsified modified asphalt is 30%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 70 percent which is the same as that of the emulsified and modified asphalt, and the water content is 30 percent.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35.
And step B, adding 7 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 89 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 4% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; and finishing the preparation process of the high-performance mixture.
Step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
Example 6:
in this example, the aggregate is type B aggregate, and the grading of the type B aggregate is as follows.
In the embodiment, the mixture comprises the following components in parts by weight: epoxy emulsified modified asphalt: 7%, aggregate: 87%, cement: 6 percent.
The epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 60: 45.
In the embodiment, the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt to prepare the emulsified modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 60%, and the water content of the emulsified modified asphalt is 40%.
In this embodiment, the solid content of the hydrophilic epoxy resin solution is 60% which is the same as the solid content of the emulsified and modified asphalt, and the water content of the hydrophilic epoxy resin solution is 40%.
In this embodiment, the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether polyol, nonylphenol-terminated polyurethane resin, modified fatty amine, phenol-aldehyde amine, and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water in any proportion.
In this embodiment, the cement is ordinary portland cement, no special requirement is made on the grade, and the grade of the cement is generally 32.5 or 42.5, and the cement dosage must ensure that all the water contained in the mixture can be used for hydrating the cement.
The construction method of the high-performance mixture comprises the following steps.
The method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps.
Step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps.
Step a: preparing modified asphalt from rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by an emulsification process; the solid content of the emulsified modified asphalt is 60%, and the water content of the emulsified modified asphalt is 40%.
Step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 60 percent which is the same as that of the emulsified and modified asphalt, and the water content is 40 percent.
Mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 60: 45.
And step B, adding 7 weight percent of the epoxy emulsified modified asphalt prepared in the step A into 87 weight percent of aggregate, and stirring for 50-70 seconds at normal temperature.
C, adding 6% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; and finishing the preparation process of the high-performance mixture. Step two: constructing an interlayer bonding layer; and (4) brushing the lower bearing layer structure by using the same epoxy emulsified modified asphalt as in the step one.
Step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but encompasses equivalent technical means as would be appreciated by those skilled in the art based on the inventive concept.
Claims (3)
1. The high-performance mixture is characterized by comprising the following components in percentage by weight: epoxy emulsified modified asphalt: 4% -11%; aggregate: 78% -92%; cement: 4% -11%; the epoxy emulsified modified asphalt is prepared by mixing emulsified modified asphalt and a hydrophilic epoxy resin solution, wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35-50: 50;
the emulsified modified asphalt is prepared by modifying common heavy traffic asphalt to prepare rubber SBS or rubber SBR modified asphalt, and then emulsifying the modified asphalt; the solid content of the finally prepared emulsified modified asphalt is 50-70 percent, and the water content of the emulsified modified asphalt is 30-50 percent;
the solid content of the hydrophilic epoxy resin solution is 50-70% which is the same as that of the emulsified modified asphalt, and the water content of the hydrophilic epoxy resin solution is 30-50%;
the hydrophilic epoxy resin in the hydrophilic epoxy resin solution is prepared from epoxy resin, ethylene glycol diglycidyl ether, polyether unit of a polyvinyl alcohol group, nonyl phenol-terminated polyurethane resin, modified fatty amine, phenolic amine and alkylphenol polyoxyethylene; the solid content of the hydrophilic epoxy resin is 100%, and the hydrophilic epoxy resin can be mixed with water according to any proportion; the aggregate is A-type aggregate or B-type aggregate; wherein the grading of the A-type aggregate is as follows:
the grading of the B-type aggregate is as follows:
when the aggregate is A-type aggregate, the weight percentage of each component in the mixture is as follows: epoxy emulsified modified asphalt: 8% -11%, aggregate: 78% -87%, cement: 6 to 11 percent, and the sum of the weight percentages of the components is 100 percent;
when the aggregate is B-type aggregate, the weight percentage of each component in the mixture is as follows: epoxy emulsified modified asphalt: 5% -7%, aggregate: 87% -92%, cement: 4 to 6 percent, and the sum of the weight percent of the components is 100 percent.
2. The method for constructing a high-performance mixture according to claim 1,
the method comprises the following steps:
the method comprises the following steps: preparing a high-performance mixture; the specific method comprises the following steps:
step A: preparing epoxy emulsified modified asphalt; the method comprises the following specific steps:
step a: preparing modified asphalt by using rubber SBS or rubber SBR and heavy-cross asphalt by using high-speed shearing equipment or a colloid mill, and preparing cation emulsified modified asphalt by using an emulsification process; the solid content of the emulsified modified asphalt is 50-70%, and the water content of the emulsified modified asphalt is 30-50%;
step b: preparing hydrophilic epoxy resin solution according to the same proportion as the solid content of the emulsified modified asphalt; the solid content of the hydrophilic epoxy resin adopted in the hydrophilic epoxy resin solution is 100 percent, the hydrophilic epoxy resin can be directly mixed with water according to any proportion, and an additive is not required to be added when the hydrophilic epoxy resin is mixed with the water; the solid content of the finally prepared hydrophilic epoxy resin solution is 50-70 percent of the same as that of the emulsified and modified asphalt, and the water content is 30-50 percent;
mixing the emulsified modified asphalt and the hydrophilic epoxy resin solution in proportion to prepare epoxy emulsified modified asphalt; wherein the ratio of the emulsified modified asphalt to the hydrophilic epoxy resin solution is 65: 35-50: 50;
step B, adding the epoxy emulsified modified asphalt prepared in the step A into 78-92% of aggregate according to the weight percentage of 4-11%, and stirring for 50-70 seconds at normal temperature;
c, adding 4-11% of cement by weight into the mixed material stirred in the step B, and stirring for 50-70 seconds at normal temperature to ensure that all water contained in the mixed material can be hydrated by the cement; the preparation procedure of the high-performance mixture is completed;
step two: constructing an interlayer bonding layer; coating the lower bearing layer structure with the same epoxy emulsified modified asphalt as that in the step one;
step three: and (3) conveying the prepared high-performance mixture to a construction site for paving, compacting and forming, wherein the completion time of the construction process is not more than 3 hours.
3. The construction method of the high-performance mixture according to claim 2, characterized in that: when the construction pavement has an adjacent pavement, the second step also comprises the step of brushing the adjacent surface of the adjacent pavement of the epoxy emulsified modified asphalt, which is the same as that in the first step.
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| CN110240810A (en) * | 2019-06-28 | 2019-09-17 | 重庆建工住宅建设有限公司 | A kind of high adhered modification pitch porous pavement |
| CN110437635A (en) * | 2019-08-07 | 2019-11-12 | 启东市建筑设计院有限公司 | A kind of antifreeze rock wool pitch of high waterproof |
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| CN102060474B (en) * | 2010-12-02 | 2012-08-01 | 东莞市东物合成材料有限公司 | Thermosetting flexible epoxy resin modified emulsified asphalt |
| CN102173663B (en) * | 2011-01-10 | 2013-06-12 | 武汉理工大学 | Waterborne epoxy modified emulsified asphalt concrete for steel bridge surface and preparation method thereof |
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