CN113416422A - Epoxy asphalt caulking material and preparation method and application thereof - Google Patents
Epoxy asphalt caulking material and preparation method and application thereof Download PDFInfo
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- CN113416422A CN113416422A CN202110547350.XA CN202110547350A CN113416422A CN 113416422 A CN113416422 A CN 113416422A CN 202110547350 A CN202110547350 A CN 202110547350A CN 113416422 A CN113416422 A CN 113416422A
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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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
Abstract
The invention relates to an epoxy asphalt caulking material and a preparation method and application thereof, wherein the caulking material comprises a component A and a component B, and the weight ratio of the component A to the component B is 1: 2-12; wherein the component A comprises the following components in parts by weight: 1-100 parts of epoxy resin; the component B comprises: 10-200 parts of modified asphalt material, 5-30 parts of compatibilizer, 30-125 parts of amine curing agent, 1-30 parts of epoxy resin and 1-10 parts of accelerator. The caulking material has the advantages of proper cost, high displacement capacity, good bonding performance, good durability and fatigue resistance, and is not only suitable for the expansion joint of the ballastless track base of the high-speed railway, but also suitable for the expansion joint of highways and airport runways.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to an epoxy asphalt caulking material for a ballastless track concrete expansion joint, and a preparation method and application thereof.
Background
In order to adapt to the deformation of concrete structures at different temperatures, seams (with the width of 2-3 cm) are required to be arranged at intervals in a long-line continuous pouring structure of a bed plate, a track bed plate, a sealing layer and the like of a ballastless track. Also, seams (1-2 cm in width) exist between the chassis/support layer and the offline structure. Because the one-time investment of the track engineering is huge, the repair cost is high, and the problems of debonding, cracking, aging, water-proof failure and the like caused by the failure of the caulking material can cause huge economic loss and a plurality of social problems, the requirements on the caulking material cannot be ignored. At present, the ballastless track caulking materials of the high-speed railway which are put into operation mainly comprise caulking adhesives such as asphalt, polysulfide, polyurethane, silicone and the like, wherein the polysulfide caulking materials easily cause environmental pollution, although the asphalt caulking materials are low in price, the asphalt caulking materials are easy to cause crack separation diseases in the using process, and the two materials are gradually replaced by the polyurethane or silicone caulking materials at present. However, the polyurethanes also have the problems that the raw materials are toxic, and secondary construction waste is needed for curing shrinkage; the silicone caulking material is expensive in manufacturing cost, curing of the silicone caulking material is affected by air moisture content and structural depth, and bonding performance with concrete needs to be improved. Therefore, the ideal caulking material for the ballastless track of the high-speed railway is urgently needed.
Regarding the development of silicone sealing materials, in CN104004492A, a silicone sealing material for concrete expansion joints of ballastless tracks is provided; an adhesion promoter is given in CN108753198A to increase the adhesion strength of silicone sealant to concrete.
With regard to the development of polyurethane sealing materials, CN103992633A, CN108611041A, CN108504322A and CN107142069A provide polyurethane sealing materials for expansion joints of ballastless railways of high-speed railways, which have improved performance, but do not solve the problems of the materials.
In epoxy resin curing systems, Wanhaiyan et al in the dynamics research and performance of polyether amine/epoxy resin curing systems use polyether amine compounds as curing agents of epoxy resins, and the obtained curing system has better bending strength and impact resistance than curing systems using fatty amine and simple diamine as curing agents. CN112300742A selects and uses polyether amine and aliphatic amine curing agent, cardanol, reactive liquid rubber and other curing agent to react with epoxy resin to form epoxy resin waterproof binding material.
The introduction of asphalt into the epoxy resin curing system can increase the elongation of the cured product. For epoxy asphalt materials, CN1546571A provides an epoxy asphalt material for highways and roads and bridges, and the curing agent adopts aliphatic dibasic acid or substituted carboxylic acid, fatty acid anhydride and polyisobutylene succinic anhydride; the preparation method of the CN100348668C epoxy asphalt material is changed from CN1546571A, carboxyl or acid anhydride groups are firstly mixed with asphalt and then react with other curing agents; CN112280251A adopts sulfur modified asphalt, the curing agent adopts monoamine curing agent, the monoamine curing agent is a mixture of one or more of aliphatic amine, alicyclic amine, aromatic amine and polyether amine, the molecular formula structure of which contains 2 active hydrogen atoms, and a high-performance amine curing system epoxy asphalt material is formed, but sulfur can cause environmental pollution. CN112280326A is a convex blocking platform filling material of a high-speed railway ballastless track, maleimide modified asphalt is adopted, an epoxy resin curing agent comprises a polyether amine curing agent, a closed polyurethane prepolymer, amino polydimethylsiloxane, a curing accelerator and an auxiliary agent, and the filling material forms an interpenetrating polymer network or a sea-island structure of epoxy resin and polyurethane after curing, so that the flexibility of the material is improved; CN112322238A provides a novel foaming crack pouring sealant, wherein the asphalt adopts emulsified asphalt, and amine curing agent as medium-activity curing agent participates in reaction with other curing agent. CN112408861A discloses an environment-friendly normal temperature thermosetting modified adhesive material for quick repair, and the provided modified adhesive material comprises aggregate and environment-friendly normal temperature thermosetting modified asphalt. The environment-friendly normal-temperature thermosetting modified adhesive material comprises materials such as epoxy resin, amine curing agent, asphalt, polybutylene-maleic anhydride adduct, curing accelerator, styrene and the like. However, the epoxy asphalt material has a large low-temperature modulus, and cannot meet the requirement of deformation of the expansion joint of the ballastless track of the high-speed railway. Based on the technical scheme, the high-speed railway ballastless track caulking material needs to be optimized, and the epoxy asphalt functional material technology for the high-speed railway with better service performance and economy is formed through further research in an epoxy asphalt system.
Disclosure of Invention
The technical problem is as follows:
the invention aims to overcome the defects of the prior art and provides the epoxy asphalt caulking material which is high in displacement capacity, good in interface adhesion, good in aging resistance and proper in cost.
The technical scheme is as follows:
in order to achieve the above purpose, the invention provides the following technical scheme:
an epoxy asphalt caulking material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 2-12; wherein the component A comprises the following components in parts by weight: 1-100 parts of epoxy resin; the component B comprises: 10-200 parts of modified asphalt material, 5-30 parts of compatibilizer, 30-125 parts of amine curing agent, 1-30 parts of epoxy resin and 1-10 parts of accelerator.
Furthermore, the epoxy asphalt caulking material and the modified asphalt material are the mixture of petroleum asphalt and a modifier.
Furthermore, the epoxy asphalt caulking material comprises 10-200 parts of petroleum asphalt and 1-10 parts of modifier by weight.
Furthermore, the modifier is one or a mixture of acrylic acid, methacrylic acid, glycidyl methacrylate and maleic anhydride.
Further, the structural formula of the compatibilizer of the epoxy asphalt caulking material is as follows: R-NH2Wherein R is 12-18 alkyl.
Furthermore, the amine curing agent is one or a mixture of several of phenol aldehyde amine, polyamide and polyether amine.
Furthermore, the accelerator is fatty amine.
The preparation method of the epoxy asphalt caulking material comprises the following steps:
(1) heating 10-200 parts of petroleum asphalt to 130-150 ℃, adding 1-10 parts of modifier, and stirring and reacting the mixture for 4-6 hours to obtain a modified asphalt material;
(2) taking 10-200 parts of the modified asphalt material prepared in the step (1), heating to 130-150 ℃, adding 0-30 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 60-70 ℃, adding 30-125 parts of amine curing agent, 5-30 parts of compatibilizer and 0-10 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
The epoxy asphalt caulking material is applied to the caulking of ballastless track expansion joints, highways or airport runways.
Further, the component B of the epoxy asphalt caulking material and the component A of the epoxy asphalt caulking material are heated to 60-70 ℃ on site, and then the component A and the component B are uniformly mixed according to the weight ratio of 1: 2-12 to be used.
The epoxy asphalt caulking material has the surface drying time less than or equal to 1d, and the tensile strength of the epoxy asphalt caulking material is more than or equal to 0.80MPa at 23 ℃ in a tensile test; the tensile strength of the epoxy asphalt caulking material is less than or equal to 3.00MPa at the temperature of minus 5 ℃; the tensile strength of the epoxy asphalt caulking material is less than or equal to 4.50MPa at the temperature of minus 20 ℃. The elongation at break of the epoxy asphalt caulking material is more than or equal to 100 percent at the temperature of 23 ℃; the tensile strength of the epoxy asphalt caulking material is more than or equal to 120 percent at the temperature of minus 5 ℃; the tensile strength of the epoxy asphalt caulking material is more than or equal to 160 percent at the temperature of minus 20 ℃.
In the adhesion test, the adhesion strength of the epoxy asphalt caulking material is more than or equal to 0.20MPa at 23 ℃; the bonding strength of the epoxy asphalt caulking material is more than or equal to 0.60MPa at the temperature of minus 5 ℃; the bonding strength of the epoxy asphalt caulking material is more than or equal to 1.00MPa at the temperature of minus 20 ℃. The bonding elongation of the epoxy asphalt caulking material is more than or equal to 25 percent at the temperature of 23 ℃; the bonding elongation of the epoxy asphalt caulking material is more than or equal to 25 percent at the temperature of minus 5 ℃; the bonding elongation of the epoxy asphalt caulking material is more than or equal to 50 percent at the temperature of minus 20 ℃. In the stretching-fixing bonding tests at different temperatures, the epoxy asphalt caulking materials are not damaged.
In the aging resistance aspect, after heat aging for 336h at 80 ℃, ultraviolet aging and soaking aging for 192h, the tensile strength of the epoxy asphalt caulking material is more than or equal to 0.70MPa, and the elongation at break is more than or equal to 80%. In addition, the influence of hot oxygen, ultraviolet and water erosion on the cohesiveness of the epoxy asphalt caulking material is satisfied without damage.
In the aspect of fatigue resistance, after passing through the standard cold drawing-hot pressing after-cohesiveness and the tensile-compression cycle test, the caulking structure of the epoxy asphalt meets the condition that the caulking structure is not damaged.
The basic principle of the material of the epoxy asphalt caulking material provided by the invention is that epoxy functional groups generate ring-opening reaction under the action of an amine curing agent to form a cured material with an irreversible three-dimensional interpenetrating network structure, and asphalt is distributed in a resin curing system in a granular manner. The three-dimensional network structure has different reactivity with epoxy resin due to different amine curing agents, so that the reaction is carried out in a staggered way, an interpenetrating network structure is formed, and the three-dimensional interpenetrating network structure endows the three-dimensional network structure with excellent performance.
The invention has the characteristics that: the epoxy asphalt system adopts the modifier to modify the petroleum asphalt in advance, increases the compatibility of the petroleum asphalt and the epoxy resin, and mainly adopts the amine curing agent on the curing agent. The use of the amine curing agent can increase the molecular chain length of an epoxy asphalt curing system, so that the low-temperature performance of the material is improved, and the requirement for deformation of the expansion joint of the ballastless track of the high-speed railway is met. Meanwhile, compared with the conventional method for improving the low-temperature performance of the material by using the silicon-oxygen bond, the epoxy asphalt carbon-oxygen bond curing system is low in cost. The amine curing agent and the compatibilizer are combined for use, so that the problem of compatibility of the amine curing agent and asphalt is solved. Finally, the invention provides the epoxy asphalt caulking material which is well bonded with concrete, controllable in curing process, free of secondary construction waste problem and low in cost.
Has the advantages that: the advantages brought by the invention are the indexes achieved.
Through a large number of experimental researches, the epoxy asphalt caulking compound suitable for the ballastless track provided by the invention has scientific and reasonable component proportion, and the composition has the following excellent performances:
(1) the construction is convenient: the caulking material A, B can be used after being uniformly mixed at 60-70 ℃ according to the design proportion.
(2) And (3) curing and stabilizing: A. the component B can be cured after being mixed, and is not influenced by the external environment.
(3) The displacement capability is good: the size of the caulking material can follow the deformation of the expansion joint, and the caulking material and the bonding surface can not be damaged.
(4) The bonding performance with concrete is good: the caulking material has higher bonding strength with concrete without using an interface agent, and meets the requirement of 50 percent of definite elongation bonding property.
(5) The durability is good: the caulking material has excellent heat aging resistance, water resistance and ultraviolet aging resistance.
(6) The cost is proper: the cost of caulking materials is greatly reduced by adopting asphalt materials.
Detailed Description
The present invention is further illustrated by the following examples. These examples are provided only for illustrating the present invention and do not limit the scope of the present invention.
Example 1
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 21 parts of epoxy resin;
and B component: 37 parts of modified asphalt material, 14 parts of compatibilizer, 49 parts of curing agent, 9 parts of epoxy resin and 1.6 parts of accelerator;
A. the weight ratio of the two components B is 1: 5.26.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 12 alkyl, the curing agent is phenol-aldehyde amine, the accelerating agent is fatty amine, the modified asphalt material is the mixture of petroleum asphalt and a modifying agent, and the modifying agent is acrylic acid.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 50 parts of petroleum asphalt to 130 ℃, adding 1 part of modifier, and reacting the mixture while stirring for 4 hours to obtain a modified asphalt material;
(2) taking 37 parts of the modified asphalt material prepared in the step (1), heating to 130 ℃, adding 9 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 60 ℃, adding 49 parts of curing agent, 14 parts of solubilizer and 1.6 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 2
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 17 parts of epoxy resin;
and B component: 16 parts of modified asphalt material, 12 parts of compatibilizer, 36 parts of curing agent, 8 parts of epoxy resin and 1 part of accelerator;
A. the weight ratio of the two components B is 1: 4.45.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 12 alkyl, the curing agent is polyamide, the accelerator is fatty amine, the modified asphalt material is the mixture of petroleum asphalt and a modifier, wherein the modifier is maleic anhydride.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 15 parts of petroleum asphalt to 135 ℃, adding 5 parts of modifier, and reacting the mixture while stirring for 4 hours to obtain a modified asphalt material;
(2) taking 16 parts of the modified asphalt material prepared in the step (1), heating to 135 ℃, adding 8 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 60 ℃, adding 36 parts of curing agent, 12 parts of solubilizer and 1 part of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 3
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 7 parts of epoxy resin;
and B component: 11 parts of modified asphalt material, 10 parts of compatibilizer, 30 parts of curing agent, 3 parts of epoxy resin and 0.8 part of accelerator;
A. the weight ratio of the two components B is 1: 8.34.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 16 alkyl, the curing agent is polyether amine, the accelerating agent is fatty amine, the modified asphalt material is the mixture of petroleum asphalt and a modifying agent, wherein the modifying agent is the mixture of acrylic acid and methacrylic acid in a ratio of 1: 1.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 10 parts of petroleum asphalt to 140 ℃, adding 1 part of modifier, and stirring the mixture while reacting for 5 hours to obtain a modified asphalt material;
(2) taking 11 parts of the modified asphalt material prepared in the step (1), heating to 135 ℃, adding 3 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 65 ℃, adding 30 parts of curing agent, 10 parts of solubilizer and 0.8 part of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 4
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 25 parts of epoxy resin;
the component B comprises the following components in parts by weight: 58 parts of modified asphalt material, 16 parts of compatibilizer, 64 parts of curing agent, 11 parts of epoxy resin and 2.3 parts of accelerator;
A. the weight ratio of the two components B is 1: 6.05.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 14 alkyl, the curing agent is mixture of phenol aldehyde amine and polyamide 1:1, the accelerating agent is fatty amine, the modified asphalt material is mixture of petroleum asphalt and a modifier, wherein the modifier is acrylic acid and methacrylic acidAnd glycidyl methacrylate 3:1: 1.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 100 parts of petroleum asphalt to 150 ℃, adding 5 parts of modifier, and stirring the mixture while reacting for 5 hours to obtain a modified asphalt material;
(2) taking 58 parts of the modified asphalt material prepared in the step (1), heating to 140 ℃, adding 11 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 70 ℃, adding 64 parts of curing agent, 16 parts of solubilizer and 2.3 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 5
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 32 parts of epoxy resin;
and B component: 150 parts of modified asphalt material, 6.0 parts of modifier, 25 parts of compatibilizer, 125 parts of curing agent, 18 parts of epoxy resin and 5.0 parts of accelerator;
A. the weight ratio of the two components B is 1: 10.0.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 18 alkyl, the curing agent is a mixture of phenol-aldehyde amine and polyether amine in a ratio of 1:1, the accelerator is fatty amine, and the modified asphalt material is a mixture of petroleum asphalt and a modifier, wherein the modifier is a mixture of acrylic acid and methacrylic acid in a ratio of 2: 1.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 200 parts of petroleum asphalt to 150 ℃, adding 10 parts of modifier, and reacting the mixture while stirring for 6 hours to obtain a modified asphalt material;
(2) taking 150 parts of the modified asphalt material prepared in the step (1), heating to 150 ℃, adding 18 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 70 ℃, adding 125 parts of curing agent, 25 parts of solubilizer and 5 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 6
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 28 parts of epoxy resin;
and B component: 58 parts of modified asphalt material, 20 parts of compatibilizer, 90 parts of curing agent, 14 parts of epoxy resin and 2.8 parts of accelerator;
A. the weight ratio of the two components B is 1: 6.47.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 15 alkyl, the curing agent is polyamide and polyether amine mixed in a ratio of 1:1, the accelerator is fatty amine, and the modified asphalt material is petroleum asphalt and a modifier mixed in a ratio of 2:3:2:1, wherein the modifier is acrylic acid, methacrylic acid, glycidyl methacrylate and maleic anhydride.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 60 parts of petroleum asphalt to 146 ℃, adding 6 parts of modifier, and reacting the mixture while stirring for 5 hours to obtain a modified asphalt material;
(2) taking 58 parts of the modified asphalt material prepared in the step (1), heating to 146 ℃, adding 14 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 63 ℃, adding 90 parts of curing agent, 20 parts of solubilizer and 2.8 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 7
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 30 parts of epoxy resin;
and B component: 68 parts of modified asphalt material, 22 parts of compatibilizer, 110 parts of curing agent, 16 parts of epoxy resin and 3.2 parts of accelerator;
A. the weight ratio of the two components B is 1: 7.22.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 12Alkyl, phenolic aldehyde amine, polyamide and polyether amine which are mixed according to the ratio of 1:1:1 as a curing agent, fatty amine which is an accelerating agent, and petroleum asphalt which is a modified asphalt material and a modifying agent which is mixed according to the ratio of 3:3:2:1 as the modifying agent.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 100 parts of petroleum asphalt to 145 ℃, adding 7 parts of modifier, and reacting the mixture while stirring for 5 hours to obtain a modified asphalt material;
(2) heating 68 parts of the modified asphalt material prepared in the step (1) to 150 ℃, adding 16 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 60 ℃, adding 110 parts of curing agent, 22 parts of solubilizer and 3.2 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
Example 8
The epoxy asphalt caulking material comprises a component A and a component B, and comprises the following components in parts by weight:
the component A comprises: 28 parts of epoxy resin;
and B component: 47 parts of modified asphalt material, 18 parts of compatibilizer, 72 parts of curing agent, 12 parts of epoxy resin and 2.0 parts of accelerator;
A. the weight ratio of the two components B is 1: 5.32.
In the above components, the compatibilizer is a structural formula R-NH2Wherein R is 15 alkyl, the curing agent is phenolic aldehyde amine, polyamide and polyether amine which are mixed according to the ratio of 1:2:3, the accelerator is fatty amine, the modified asphalt material is the mixture of petroleum asphalt and a modifier, wherein the modifier is acrylic acid, methacrylic acid, glycidyl methacrylate and maleic anhydride which are mixed according to the ratio of 1:1:2: 1.
The preparation method of the component B in the epoxy asphalt caulking material comprises the following steps:
(1) heating 50 parts of petroleum asphalt to 138 ℃, adding 3 parts of modifier, and reacting the mixture while stirring for 4 hours to obtain a modified asphalt material;
(2) heating 47 parts of the modified asphalt material prepared in the step (1) to 142 ℃, adding 12 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 62 ℃, adding 72 parts of curing agent, 18 parts of solubilizer and 2 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
The content of technical indexes of the epoxy asphalt caulking material testing in the implementation range of 1-8 is shown in table 1, and the testing is carried out according to the working performance, the mechanical performance, the interface bonding performance, the aging resistance and the fatigue resistance, wherein the tensile strength and the elongation at break are tested according to GB/T16777-2008; the definite elongation adhesion, cold drawing-hot pressing adhesion and tensile compression cycle adhesion were tested according to GB/T13477-2002. The test results are shown in table 2 below.
TABLE 1 technical index contents of epoxy asphalt caulking materials
TABLE 2 epoxy asphalt caulking material test results for ballastless track
The test results in table 2 show that:
1. the tack free time of the epoxy asphalt caulk prepared by the invention is 1 day, which shows that the epoxy asphalt caulk prepared by the invention
The epoxy asphalt caulking material has high curing speed, can form surface drying in a short time, prevents construction dust, personnel treading and other damages, is not interfered by external environment in the curing process of the epoxy asphalt caulking material prepared by the invention, and has stable curing time.
2. When the environmental temperature is 23 ℃, the tensile strength is 0.95MPa to 1.32MPa, and the elongation at break is 120.54 percent to 140.55 percent; when the environmental temperature is-5 ℃, the tensile strength is 1.45MPa-2.24MPa, and the elongation at break is 150.25% -180.05%; when the environmental temperature is-20 ℃, the tensile strength is 2.12MPa-3.00MPa, and the elongation at break is 200.04% -250.03%, which shows that the epoxy asphalt caulking material prepared by the invention has reasonable mechanical property, can bear certain tensile strength, and has larger elongation at break; meanwhile, the tensile strength and the elongation at break are improved along with the reduction of the environmental temperature, and when the environmental temperature is reduced from 23 ℃ to-20 ℃, the tensile strength is improved by 126 percent, and the elongation at break is improved by 72 percent, which shows that the epoxy asphalt caulking material prepared by the invention has better flexibility at low temperature to adapt to the deformation of the expansion joint.
3. The epoxy asphalt caulking material prepared by the invention has the bonding strength of 0.40MPa to 0.60MPa at 23 ℃, the bonding strength of 0.85MPa to 0.95MPa at 5 ℃ and the bonding strength of 0.95MPa to 1.26MPa at 20 ℃; when the ambient temperature is reduced from 23 ℃ to-20 ℃, the tensile strength is improved by 118%, which shows that the epoxy asphalt caulking material prepared by the invention has better adhesive property with the concrete interface, and the adhesive property is improved along with the reduction of the ambient temperature.
4. After the epoxy asphalt caulking material prepared by the invention is soaked in water for 192 hours, the tensile strength at 23 ℃ is attenuated by 1-9%, and the elongation at break at 23 ℃ is attenuated by 1-4%; after thermal aging, the tensile strength at 23 ℃ is attenuated by 3-5%, and the elongation at break at 23 ℃ is attenuated by 3-6%; after ultraviolet aging, the tensile strength at 23 ℃ is attenuated by 1-6%, and the elongation at break at 23 ℃ is attenuated by 4-8%, which shows that the aging has certain influence on the epoxy asphalt caulking material prepared by the invention, and the influence degree is that soaking aging is more than or equal to ultraviolet aging and more than or equal to thermal aging in sequence. The maximum attenuation of aging to the tensile strength at 23 ℃ is 9 percent, the maximum attenuation to the elongation at break is 8 percent, and the maximum attenuation is in the normal attenuation range. This demonstrates that the epoxy asphalt caulk prepared by the present invention has good aging resistance.
5. The definite-elongation cohesiveness of the epoxy asphalt caulking material prepared by the invention is not damaged under various states (23 ℃, 20 ℃ and aging treatment), which shows that the epoxy asphalt caulking material prepared by the invention has good displacement capability, the size of the caulking material can follow the deformation of an expansion joint, and the caulking material and a bonding surface can not be damaged, thereby having good interface cohesiveness and aging resistance.
6. The adhesion of the epoxy asphalt caulking material prepared by the invention after cold drawing-hot pressing and the adhesion after stretching-compression circulation are not damaged, which shows that the epoxy asphalt caulking material prepared by the invention has good fatigue resistance.
Claims (10)
1. The epoxy asphalt caulking material is characterized by comprising a component A and a component B, wherein the weight ratio of the component A to the component B is 1: 2-12; wherein the component A comprises the following components in parts by weight: 1-100 parts of epoxy resin; the component B comprises: 10-200 parts of modified asphalt material, 5-30 parts of compatibilizer, 30-125 parts of amine curing agent, 1-30 parts of epoxy resin and 1-10 parts of accelerator.
2. The epoxy asphalt caulk material of claim 1, wherein the modified asphalt material is a blend of petroleum asphalt and a modifier.
3. The epoxy asphalt caulking material of claim 2, wherein the petroleum asphalt and the modifier are mixed by weight in the range of 10-200 parts of petroleum asphalt and 1-10 parts of modifier.
4. The epoxy asphalt caulking material of claim 2, wherein the modifier is one or a mixture of acrylic acid, methacrylic acid, glycidyl methacrylate and maleic anhydride.
5. The epoxy asphalt caulking material according to claim 1, wherein the compatibilizer has the structural formula: R-NH 2, wherein R is a 12-18 alkyl group.
6. The epoxy asphalt caulking material of claim 1, wherein the amine curing agent is one or a mixture of phenolic amine, polyamide and polyether amine.
7. The epoxy asphalt caulk according to claim 1, wherein the accelerator is a fatty amine.
8. The preparation method of the epoxy asphalt caulking material of claim 1, wherein the preparation of the component B comprises the following steps:
(1) heating 10-200 parts of petroleum asphalt to 130-150 ℃, adding 1-10 parts of modifier, and stirring and reacting the mixture for 4-6 hours to obtain a modified asphalt material;
(2) taking 10-200 parts of the modified asphalt material prepared in the step (1), heating to 130-150 ℃, adding 0-30 parts of epoxy resin, and stirring and mixing to obtain a mixture;
(3) and (3) cooling the mixture prepared in the step (2) to 60-70 ℃, adding 30-125 parts of amine curing agent, 5-30 parts of compatibilizer and 0-10 parts of accelerator, and stirring and mixing to obtain the component B of the epoxy asphalt caulking material.
9. The use of the epoxy asphalt caulk material of claim 1 in ballastless track expansion joints, road or airport runway caulks.
10. Use according to claim 9, characterized in that: heating the component B of the epoxy asphalt caulking material and the component A of the epoxy asphalt caulking material to 60-70 ℃ on site, and then uniformly mixing the component A and the component B according to the weight ratio of 1: 2-12 for use.
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