WO2021129232A1

WO2021129232A1 - Permeable regenerated sand-containing fog seal layer material and preparation method therefor

Info

Publication number: WO2021129232A1
Application number: PCT/CN2020/129265
Authority: WO
Inventors: 潘友强; 徐德根; 陈香; 陈李峰; 臧冬冬; 庞一朋; 章阳; 吴瑶; 盛晓慧
Original assignee: 江苏中路交通科学技术有限公司
Priority date: 2019-12-26
Filing date: 2020-11-17
Publication date: 2021-07-01
Also published as: CN111040361B; CN111040361A

Abstract

A permeable regenerated sand-containing fog seal layer material and a preparation method therefor. A sand-containing fog seal layer material prepared by mixing materials, such as an organic solvent, a synthesized thermoplastic acrylic resin, solid asphalt particles, an active regenerant, a modified organosiloxane wear-resistant auxiliary agent, and a thermoplastic elastomer thickener, with fine sand is an oily material. The sand-containing fog seal layer material has good permeability and regeneration performance on an asphalt surface layer, and the prepared sand-containing fog seal layer material has high strength, good skid resistance and waterproof performance, high bonding strength with an original asphalt pavement, and good wear resistance. The preparation method for the sand-containing fog seal layer material is convenient to operate, low in energy consumption, and suitable for large-scale construction application in preventive maintenance of the asphalt pavement.

Description

Permeable regenerated sand-containing mist sealing layer material and preparation method thereof

Technical field

The invention belongs to the technical field of road asphalt maintenance materials, and in particular relates to a permeable regenerated sand-containing fog seal material used in the preventive maintenance of asphalt pavements and a preparation method thereof.

Background technique

Sand-containing mist seal technology is a common preventive maintenance method. Fine-grained sand is mixed with modified emulsified asphalt, and special additives are added to make it uniformly and stably suspended, and then sprayed on the road through high-pressure equipment, eliminating the need for afterthought The two-step process of sanding and rubber wheel compaction, and because the fine-grained sand is fully covered by the mortar, it is more uniform, firm and stable compared to sanding and rolling, and has better performance than ordinary mist seals. Anti-skid performance.

Chinese patent CN108585621 A "A asphalt-based concentrated cover material and its preparation method and sand-containing mist seal mixture" discloses the use of clay, emulsifier and water to form a slurry-type emulsified soap to emulsify the asphalt so that each component can interact with each other. Combine to form a unified whole, improve the consistency and stability of emulsified asphalt, and improve the effect of sand suspension. However, the asphalt and the original asphalt base have low bonding strength, so the wear resistance is poor. Chinese patent CN108070269 A "An epoxy modified emulsified asphalt sand-containing mist seal material and its preparation method and application" discloses a sand-containing mist seal material prepared by using epoxy resin, a water-soluble curing agent, and emulsified asphalt. The sand-containing mist seal layer prepared by epoxy resin and curing agent modified emulsified asphalt asphalt can improve its bonding strength with the asphalt base surface. However, it is a water-based material and has poor permeability on oily asphalt pavements, and the improvement effect is limited. And because the epoxy resin and the curing agent are prone to curing reaction after being mixed, the storage period is short; if the two-component packaging is used separately, it should be prepared before use when using it, which is not convenient for on-site construction. Chinese patent CN109135486 A "High wear-resistant sand-containing mist seal material and its preparation method and application" adopts the main component of modified methacrylic resin, which is combined with curing agent, anti-aging agent, matting agent, inorganic filler, etc. It is made of fine sand, and oily methacrylic resin is used to improve the adhesion between the sand-containing mist seal layer and the asphalt base layer, thereby improving the wear resistance, but the film-forming material of this material is pure methacrylic resin, and the preparation cost Very high, not suitable for engineering applications.

According to the above-mentioned patented technology and the current use and application of sand-containing mist seals, as the current sand-containing mist seal materials in China generally use SBR modified emulsified asphalt, SBS modified emulsified asphalt, and waterborne epoxy modified emulsified asphalt. Adopting water-based sand-and-mist sealing layer material has poor permeability on the original asphalt base surface and low bonding strength with the original asphalt base surface.

In view of the technical shortcomings of the above-mentioned existing sand-containing mist seals in the application of asphalt pavement pre-maintenance, the present inventors have been actively involved in the design and manufacture of such products based on their rich practical experience and professional knowledge for many years. Research and innovation, in order to create a permeable recycled sand-containing mist seal material and its preparation method to make it more practical. After continuous research, design, and repeated trial and improvement of samples and improvements, the present invention with real practical value was finally created.

Summary of the invention

The first object of the present invention is to provide a permeable recycled sand-containing mist sealing material, which overcomes the defects of the existing sand-containing mist sealing material having poor permeability on the original asphalt base surface and low bonding strength with the original asphalt base surface. .

The purpose of the present invention and the solution of its technical problems are achieved by adopting the following technical solutions:

A permeable regenerated sand-containing mist sealing layer material, including the following components, the main material of the permeable regenerated sand-containing mist seal layer, a thermoplastic elastomer thickener, a modified organosiloxane abrasion resistance assistant, and 20- 60 mesh fine sand.

Preferably, the main material of the permeable regenerated sand mist seal layer includes the following components by weight:

100 parts of organic solvent;

15-30 parts of solid asphalt particles, if the content of solid asphalt particles is too low, less than 15 parts in the whole composition, the prepared permeable regenerated sand mist sealing layer material has low solid content and less effective film-forming components. The bonding strength is not enough. If the content of solid asphalt particles is too high, more than 30 parts, it will be difficult to dissolve completely;

3-7 parts of active regenerant. If the content of active regenerant is too low, less than 3 parts in the whole component will not have the effect of reducing and regenerating the aged asphalt. If the content is too high, more than 7 parts will cause sand-containing mist seal. The layers of the film are soft, reducing the adhesion;

10-20 parts of methyl acrylate, 7-14 parts of methyl 2-methacrylate, 3-6 parts of styrene, the content of methyl acrylate and methyl 2-methacrylate is too low or the content of styrene monomer is too high, The glass transition temperature of the synthesized thermoplastic acrylic acid is too high, and it is difficult to form a film at room temperature. It requires high temperature heating to form a film. It is not suitable for application on the construction site. The content of methyl acrylate and 2-methyl methacrylate is too high or styrene The monomer content is too low, causing the synthetic acrylic resin film to be too soft, and the bonding strength is low, which cannot improve the bonding strength;

0.5-1 part of organic peroxide catalyst, the amount of organic peroxide catalyst is too low, less than 0.5 part in the whole composition, the reaction rate is too slow, the reaction time is too long, which affects production efficiency, the amount of organic peroxide catalyst is too much High, the polymerization reaction speed is too fast, it is difficult to control, and there is a risk of explosion;

The weight parts of the remaining components in the permeable regenerated sand mist sealing layer material are as follows:

100 parts of the main material of the permeability regenerated sand mist seal layer;

1-5 parts of thermoplastic elastomer thickener, the content of thermoplastic elastomer thickener is too low, less than 1 part in the whole composition, can not make the viscosity of the sand-containing mist sealing layer material achieve the effect of stabilizing sand suspension, and it is easy to occur The phenomenon of fine sand sinking and blocking the pipe, the content of the thermoplastic elastomer thickener is too high, higher than 5 parts, the viscosity of the material is too large, the permeability becomes poor, and it cannot form a whole with the original roadbed and pavement, and it is easy to fall off after construction;

1-3 parts of modified organosiloxane abrasion resistance additives, the content of modified organosiloxane abrasion resistance additives is too low, less than 1 part in the whole composition, it can not improve the abrasion resistance effect , The content is too high, higher than 3 parts will affect the low-temperature flexibility of the sand-and-mist seal material, and increase the risk of low-temperature cracking resistance;

20-40 parts of 20-60 mesh fine sand, the content of fine sand is too low, less than 20 parts in the whole composition, the anti-skid performance after construction does not meet the requirements, the content of fine sand is too high, more than 40 parts, bonding The material content is low, and the prepared sand-and-mist sealing layer material is difficult to condense into one body, and it is prone to looseness and particle drop.

Preferably, the organic solvent is an aromatic solvent, preferably any one of aromatic solvent oils such as xylene, S-1000, S-1500, and S-2000.

Preferably, the organic peroxide catalyst is any one of benzoyl peroxide, diethyl propyl benzene peroxide, or m-chloroperoxybenzoic acid.

Preferably, the active regenerant is one of aromatic oil or naphthenic oil.

Preferably, the thermoplastic elastomer thickener is any one of SBS, SBR, SIS or SEBS.

Preferably, the modified organosiloxane abrasion resistance assistant is any one of modified dimethylsiloxane, silicone-modified polysiloxane, or polyester-modified polysiloxane.

Preferably, the solid pitch particles are any one of rock pitch, coal pitch or petroleum hard pitch particles.

Preferably, the fine sand is any one of quartz sand, emery sand or steel slag.

The second object of the present invention is to provide a method for preparing a permeable regenerated sand-and-mist-containing sealing layer material, which overcomes the poor permeability of the existing sand-and-mist sealing layer material on the original asphalt base surface and the bonding strength with the original asphalt base surface. Low defects, simplified operation process and reduced energy consumption.

A preparation method of permeable regenerated sand-containing mist sealing layer material is prepared by the following steps:

(1) Add 100 parts of organic solvent to the stirred reactor and raise the temperature to 70-80℃, then add 15-30 parts of solid asphalt particles and 3-7 parts of active regenerant, stir for 0.5-1h, and then slowly add to the reactor Add 10-20 parts of methyl acrylate, 3-6 parts of styrene, 7-14 parts of methyl 2-methacrylate, 0.5-1 parts of organic peroxide catalyst, and control the dripping time not less than 30min, after all the dripping is completed, the reaction is stirred for 1-2h and then cooled to room temperature, and then the main material of the permeability regenerated sand mist seal layer is prepared;

(2) Combine 100 parts of the main material of the permeable regenerated mist seal layer prepared in step (1), 1-5 parts of thermoplastic elastomer thickener, 1-3 parts of modified organosiloxane wear resistance assistant, 20- 40 parts of fine sand are stirred in a high-speed shearing disperser for 15-30 minutes and then mixed to obtain a permeability regenerated sand-containing mist sealing layer material.

Preferably, the active regenerant is one of aromatic oil or naphthenic oil.

Preferably, the fine sand is any one of quartz sand, emery sand or steel slag.

With the above technical solutions, the following technical effects can be achieved:

(1) The sand-containing mist sealing layer material prepared by blending organic solvents, synthetic thermoplastic acrylic resins, solid asphalt particles, active regenerants, modified organosiloxane wear-resistant additives, thermoplastic elastomer thickeners, etc. is Oily material has good infiltration, dispersion and penetration on the asphalt base surface, and can form a whole with the asphalt pavement through penetration. At the same time, the thermoplastic acrylic resin can be used as a resin adhesive to improve the bonding strength between it and the asphalt surface layer. To improve durability;

(2) The added organosiloxane anti-wear additives, the modified organosiloxane molecules are highly active, and the water in the air between the organosiloxane molecules undergoes hydrolysis during the film formation process (si- oH) Silanol bond, cross-linking and reaction between more than 3 silanol bonds to form a cross-linked network or body structure with si-o-si bond, on the other hand, silanol bond can be transesterified with acrylate Reaction, the introduction of the si-o-si bond spatial network structure into the molecular chain of acrylic resin, due to the higher si-o bond density, the hardness of the film after the system is formed is increased, and the wear resistance of the sand-containing mist seal layer can be improved Performance and durability;

(3) The active regenerant can restore and regenerate the aging asphalt on the asphalt surface through the penetration effect, restore the performance of the aging asphalt, and improve the service life of the pavement;

(4) Choose aromatic hydrocarbon solvents with strong solubility to increase the compatibility between acrylic resin and asphalt. In the process of acrylic resin synthesis, asphalt is added, and the acrylic monomer and solvent are used to dissolve the asphalt to reduce the synthesis rate of acrylic resin and prevent the explosion of acrylic acid synthesis. Under the action of peroxide catalyst free radicals, some of the unsaturated bonds in the asphalt molecules are activated and grafted with acrylic acid, which improves the polarity of the asphalt and increases the adhesion of the asphalt membrane; in addition, the solvent asphalt The two processes of preparation and the preparation of thermoplastic propylene resin are combined into one, which saves the production time of the material, reduces the energy consumption, and improves the production efficiency of the material;

(5) Thermoplastic elastomer is used as thickener. The thickener is a thermoplastic elastomer polymer with large molecular weight. After being added, under the dissolution of solvent molecules, the thickener will increase the viscosity of the solution due to its large molecular weight. Increase the viscosity of the sand and mist seal layer material to form a good suspension of fine sand; after the construction is completed, after the solvent of the sand mist seal layer evaporates, the rubber component in the thermoplastic elastomer can modify the asphalt film and the acrylic film. It improves the low-temperature flexibility of the sand-and-mist sealing layer material, and prevents low-temperature cracking after construction;

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, characteristics and effects of a permeable regenerated sand-containing mist sealing layer material and its preparation method according to the present invention are proposed. The following describes in detail a permeable regenerated sand-containing mist sealing layer material provided by the present invention and a preparation method thereof in conjunction with specific examples, but it should not be understood as a limitation of the protection scope of the present invention.

The models and specific manufacturers of commercially available materials of the present invention are as follows:

Xylene, CAS#: 56-26, heterogeneous grade, Jinan Mingxin Chemical Co., Ltd.;

Aromatic solvent oil: S-1000, S-1500, S-2000, Nanjing Bright Chemical Co., Ltd.;

Rock asphalt: T140, Tianjin Chengli Chemical Co., Ltd.;

Coal pitch: Handan County Furun Chemical Co., Ltd.;

Petroleum hard asphalt particles: anti-rutting masterbatch, Sinopec Luoyang Branch;

Aromatic oil, naphthenic oil: Zibo Guangyi Petrochemical Co., Ltd.;

Methyl acrylate CAS#:96-33-3, 2-Methyl methacrylate CAS#80-62-6: Jinan Huifengda

Chemical Co., Ltd.;

Styrene CAS#: 100-42-5: Nanjing Xingsha Chemical Co., Ltd.;

Benzoyl peroxide catalyst, CAS#:94-36-0: Jinan Huijinchuan Trading Co., Ltd.;

Diethylene propylene benzene peroxide catalyst, CAS#: 80-43-3; Hongbaoli Group Co., Ltd.;

M-chloroperoxybenzoic acid, CAS:937-14-4: Wuhan Xinxinjiali Biological Technology Co., Ltd.;

Modified dimethylsiloxane anti-wear agent, SF-653, Dongguan Sifang Chemical Co., Ltd.;

Polyether modified polydimethylsiloxane wear-resistant agent, 8530H: Shanghai Puzhen Biological Technology Co., Ltd.;

Silicone modified polysiloxane anti-wear agent: Shandong Moore Chemical Co., Ltd.;

SBS 792, SBR 1502, SEBS YH503T, SIS 1105: Sinopec Baling Petrochemical;

Quartz sand, steel slag: Lingshou County Lanxiang Mineral Products Processing Factory;

Emery: Wuhu MCC Environmental Technology Co., Ltd.;

Example 1

Prepare the permeability regenerated sand mist sealing layer material through the following steps:

(1) Add 1000kg of xylene into the stainless steel electric heating reactor, turn on the temperature to heat, and when the temperature rises to 70℃, add 150kg of rock asphalt particles and 30kg of aromatic oil regenerant, stir for 0.5h, and then Slowly add 100kg of methyl acrylate, 30kg of styrene, 70kg of methyl 2-methacrylate, and 5kg of benzoyl peroxide catalyst to the reaction kettle, control the dripping time to 0.5h, and continue after the dripping is completed. After stirring and reacting for 1 hour, it is cooled to room temperature, and the main material of the permeability regenerated sand mist seal layer is prepared;

(2) Put 1000kg of the main material of the permeability regenerated sand mist seal layer prepared in step (1), 10kg of SBR thickener, 10kg of modified dimethylsiloxane, 200kg of 20 mesh quartz sand in high-speed shearing After stirring for 15 minutes in a cutting and dispersing machine, the mixture is mixed to obtain the permeability regenerated sand-containing mist sealing layer material 1.

Example 2

(1) Add 1000kg of S-1000 aromatic solvent oil into the stainless steel electric heating reactor, turn on the temperature to heat, wait for the temperature to rise to 80℃, add 300kg of petroleum hard asphalt particles, 70kg of naphthenic oil regenerant and stir for 1h , And then slowly drip 150kg of methyl acrylate, 45kg of styrene, 100kg of methyl 2-methacrylate, 7kg of diethylene propylene peroxide catalyst into the reactor, and control the dripping time to 0.6h, etc. After the addition, continue to stir and react for 1.5 hours and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Put 1000kg of the main material of the permeability regenerated sand-containing mist seal layer prepared in step (1), 30kg SIS thickener, 30kg silicone modified polysiloxane wear resistance assistant, and 400kg 60 mesh emery After stirring for 30 minutes in a high-speed shearing disperser, the mixture is mixed to obtain the permeability regenerated sand-containing mist sealing layer material 2.

Example 3

(1) Add 1000kg of S-1500 aromatic solvent oil into the stainless steel electric heating reactor, turn on the temperature heating, wait for the temperature to rise to 75℃, add 200kg coal tar particles, 50kg aromatic oil regenerant and stir for 0.5h, then Slowly add 200kg of methyl acrylate, 60kg of styrene, 140kg of methyl 2-methacrylate, and 10kg of diethylene propylene peroxide catalyst into the reaction kettle, control the dripping time to 0.6h, and wait until the dripping is complete. Then continue to stir and react for 2 hours and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Combine 1000kg of the main material of the permeability regenerated sand-containing mist seal layer prepared in step (1), 50kg SEBS thickener, 30kg polyester modified polysiloxane wear resistance assistant, 300kg 40 mesh quartz sand After stirring for 20 minutes in a high-speed shearing disperser, the mixture is mixed to obtain the permeability regenerated sand-containing mist sealing layer material 3.

Example 4

(1) Add 1000kg of S-2000 aromatic solvent oil into the stainless steel electric heating reactor, turn on the temperature heating, and wait for the temperature to rise to 80℃, add 300kg of petroleum hard asphalt particles and 40kg of aromatic oil regenerant and stir for 1h. Then slowly drip 120kg of methyl acrylate, 40kg of styrene, 100kg of methyl 2-methacrylate, 8kg of m-chloroperoxybenzoic acid catalyst into the reaction kettle, control the dripping time to 0.5h, etc. After the completion, continue to stir and react for 1.5 hours and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Put 1000kg of the main material of the permeable regenerated sand-containing mist seal layer prepared in step (1), 30kg SBS thickener, 20kg silicone modified polysiloxane wear resistance assistant, and 200kg 20 mesh steel slag. After stirring for 20 minutes in a high-speed shearing disperser, the mixture is mixed to obtain a permeability regenerated sand-containing mist sealing layer material 4.

Example 5

(1) Add 1000kg of xylene aromatic solvent naphtha into the stainless steel electric heating reactor, turn on the temperature heating, wait for the temperature to rise to 70℃, add 200kg of rock asphalt particles, 50kg of naphthenic oil regenerant and stir for 0.5h, then Slowly add 200kg of methyl acrylate, 60kg of styrene, 140kg of methyl 2-methacrylate, and 10kg of benzoyl peroxide catalyst to the reaction kettle, and control the dripping time to 0.8h, and wait until the dripping is completed. Continue to stir and react for 2 hours and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Put 1000kg of the main material of the permeability regenerated sand mist seal layer prepared in step (1), 10kg SEBS thickener, 30kg modified dimethylsiloxane wear-resistant additive, and 400kg 40 mesh quartz sand. After stirring for 20 minutes in a high-speed shearing disperser, the mixture is mixed to obtain a permeability regenerated sand-containing mist sealing layer material 5.

Example 6

(1) Add 1000kg of S-1500 aromatic solvent oil into the stainless steel electric heating reactor, turn on the temperature to heat, wait for the temperature to rise to 80℃, add 100kg coal tar particles and 30kg aromatic oil regenerant and stir for 0.5h, then Slowly drip 150kg of methyl acrylate, 40kg of styrene, 100kg of methyl 2-methacrylate, 5kg of benzoyl peroxide catalyst into the reactor, control the dripping time to 0.5h, and wait until the dripping is completed. Continue to stir and react for 1 hour and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Put 1000kg of the main material of the permeability regenerated sand-containing mist seal layer prepared in step (1), 30kg SIS thickener, 20kg of silicone modified polysiloxane wear resistance assistant, and 300kg of 20 mesh emery in After stirring in a high-speed shearing disperser for 15 minutes, the mixture is mixed to obtain a permeability regenerated sand-containing mist sealing layer material 6.

Example 7

(1) Add 1000kg of S-1500 aromatic solvent oil into the stainless steel electric heating reactor, turn on the temperature heating, wait for the temperature to rise to 80℃, add 300kg of hard pitch particles, 40kg of naphthenic oil regenerant and stir for 0.6h , And then slowly drip 200kg of methyl acrylate, 50kg of styrene, 140kg of methyl 2-methacrylate, 10kg of benzoyl peroxide catalyst into the reactor, control the dripping time to 0.6h, etc. After completion, continue to stir and react for 2 hours and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Put 1000kg of the main material of the permeability regenerated sand-containing mist seal layer prepared in step (1), 20kg SBS thickener, 20kg modified dimethylsiloxane wear-resistant additive, and 200kg 40 mesh quartz sand. After stirring in a high-speed shearing disperser for 15 minutes, the mixture is mixed to obtain a permeability regenerated sand-containing mist sealing layer material 7.

Example 8

(1) Add 1000kg of S-2000 aromatic solvent oil into the stainless steel electric heating reactor, turn on the temperature heating, wait until the temperature rises to 80℃, add 200kg coal pitch particles, 50kg aromatic oil regenerant, and stir for 0.5h, then Slowly add 150kg of methyl acrylate, 30kg of styrene, 70kg of methyl 2-methacrylate, 6kg of diethylene propylene peroxide catalyst into the reaction kettle, control the dripping time to 0.5h, and wait until the dripping is complete. Then continue to stir and react for 1.5 hours and then cool to room temperature to prepare the main material of the permeability regenerated sand mist seal layer;

(2) Put 1000kg of the main material of the permeability regenerated sand-containing mist seal layer prepared in step (1), 30kg SBS thickener, 20kg modified dimethylsiloxane wear-resistant additive, and 300kg 20 mesh steel slag at high speed After stirring in a shearing disperser for 20 minutes, the mixture is mixed to obtain a permeability regenerated sand-containing mist sealing layer material 8.

Performance Testing:

The appearance, the bonding strength with the base surface, the surface drying time, the actual drying time, the impermeability performance, the penetration depth, the anti-skid performance, and the abrasion resistance of the permeability regenerated sand-and-mist seal layer material prepared in Test Examples 1-8 (Wet wheel wear) and Marshall stability after painting, the results are shown in Table 1;

Among them, the appearance inspection method is visual inspection;

The bonding strength with the base surface shall be tested in accordance with Appendix B of "CJJ139-2010 Urban Bridge Deck Waterproof Engineering Technical Regulations";

The surface dry time and actual dry time shall be tested in accordance with "GB/T16777-2008 Test Method for Architectural Waterproof Coatings";

Impermeability is tested in accordance with "T0971-2008 Asphalt Pavement Water Permeability Coefficient Test Method";

The anti-skid property shall be tested in accordance with "T0964-2008 Test Method for Determination of Pavement Friction Coefficient by Pendulum Instrument";

Abrasion resistance (wet wheel wear) is tested in accordance with "JTG E20-2011 Highway Engineering Asphalt and Asphalt Mixture Test Regulations";

Marshall strength after painting: test according to "JTG E20-2011 Highway Engineering Asphalt and Asphalt Mixture Test Regulations";

Penetration depth: The test method is core sampling, and the penetration depth is measured with a vernier caliper.

Table 1 Technical indicators of permeability regenerated sand-containing mist seal material

It can be seen from Table 1 that the permeable regenerated sand-containing mist sealing layer material prepared in Examples 1-8 has a uniform viscous oily black liquid in appearance. The bonding strength with the base surface is between 2.6-3.6MPa; the surface drying time is 0.5-1h, the actual drying time is: 1.2-2.5h; the impermeability of the pavement has been improved by 100%; the anti-skid after construction The performance is: 55-73BPN; the wear resistance (wet wheel abrasion) is: 120-240g/m ² ; the penetration depth is 8-13mm, and the improvement rate of Marshall strength after construction is 40-62%. It can be seen from the above experimental data that the permeable regenerated sand-containing mist sealing layer material prepared by the present invention has good permeability, high bonding strength, fast curing time, short curing time, good impermeability and good wear resistance. In summary, the permeable recycled sand-containing mist seal material of the present invention has a good reinforcement effect on pavement, can maintain good service status of asphalt pavement and prolong the service life of asphalt pavement, and can be widely used in preventiveness of all asphalt pavements Conservation field.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the profession Those skilled in the art, without departing from the scope of the technical solution of the present invention, can make use of the technical content disclosed above to make slight changes or modifications into equivalent embodiments with equivalent changes, but any content that does not depart from the technical solution of the present invention is based on The technical essence of the invention makes any simple modifications, equivalent changes and modifications to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims

A permeable regenerated sand-containing mist sealing layer material, which is characterized in that it includes the following components, the main material of the permeable regenerated sand-containing mist seal layer, a thermoplastic elastomer thickener, and a modified organosiloxane abrasion resistance assistant Agent and 20-60 mesh fine sand.
The permeable regenerated sand-mist-containing sealing layer material according to claim 1, wherein the main material of the permeable regenerated sand-mist-containing seal layer comprises the following components by weight:

100 parts of organic solvent

15-30 parts of solid asphalt particles

Active regeneration agent 3-7 parts

10-20 parts of methyl acrylate

3-6 parts of styrene

2-methyl methacrylate 7-14 parts

0.5-1 part of organic peroxide catalyst;

The weight parts of the components in the permeable regenerated sand mist-containing sealing layer material are as follows:

100 parts of the main material of the permeability regenerated sand mist seal layer;

1-5 parts of thermoplastic elastomer thickener;

1-3 parts of modified organosiloxane abrasion resistance additives;

20-40 parts of 20-60 mesh fine sand.
The permeable regenerated sand mist-containing sealing layer material according to claim 2, wherein the organic solvent is an aromatic hydrocarbon solvent.
The permeable regenerated sand-containing mist sealing layer material according to claim 2 or 3, wherein the organic peroxide catalyst is benzoyl peroxide, diethylpropyl benzene peroxide or m-chloroperoxybenzoic acid Any of them.
The permeable regenerated sand mist-containing sealing layer material according to claim 4, wherein the active regenerant is one of aromatic oil or naphthenic oil.
The permeable regenerated sand mist-containing sealing layer material according to claim 5, wherein the thermoplastic elastomer thickener is any one of SBS, SBR, SIS or SEBS.
The permeable regenerated sand mist-containing sealing layer material according to claim 5 or 6, characterized in that: the modified organosiloxane wear resistance assistant is modified dimethylsiloxane, silicone modified Either polysiloxane or polyester-modified polysiloxane.
The method for preparing a permeable regenerated sand-and-mist-containing sealing layer material according to any one of claims 1 to 7, characterized in that it comprises the following operation steps:

(1) Preparation of the main material of the permeable regenerated sand mist seal layer: add 100 parts of organic solvent to the reactor to heat up, then add 15-30 parts of solid asphalt particles, 3-7 parts of active regenerant and stir for 0.5-1h. Then slowly add 10-20 parts of methyl acrylate, 3-6 parts of styrene, 7-14 parts of methyl 2-methacrylate, 0.5-1 parts of organic peroxide catalyst, and control the dropping time into the reaction kettle. Less than 0.5h, after the dripping is completed, the reaction is stirred for 1-2h and then cooled to room temperature to obtain the main material of the permeability regenerated sand mist seal layer;

(2) Combine 100 parts of the main material of the permeable regenerated sand mist seal layer prepared in step (1), 1-5 parts of thermoplastic elastomer thickener, and 1-3 parts of modified organosiloxane abrasion resistance additives , 20-40 parts of 20-60 mesh fine sand is stirred in a high-speed shearing disperser for 15-30 minutes and then mixed to obtain a permeability regenerated sand-containing mist sealing layer material.
The preparation method of the permeability regenerated sand mist-containing sealing layer material according to claim 8, characterized in that: in step (1), the heating temperature is 70-80°C.
The method for preparing a permeable regenerated sand mist-containing sealing layer material according to claim 8, characterized in that: the modified organosiloxane abrasion resistance assistant is modified dimethylsiloxane, modified silicone Any one of flexible polysiloxane or polyester-modified polysiloxane.