CN116200045A - Non-stick emulsified asphalt, preparation method and construction process thereof - Google Patents
Non-stick emulsified asphalt, preparation method and construction process thereof Download PDFInfo
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- CN116200045A CN116200045A CN202310106885.2A CN202310106885A CN116200045A CN 116200045 A CN116200045 A CN 116200045A CN 202310106885 A CN202310106885 A CN 202310106885A CN 116200045 A CN116200045 A CN 116200045A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229920000642 polymer Polymers 0.000 claims abstract description 29
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 25
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000003607 modifier Substances 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 13
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000839 emulsion Substances 0.000 claims description 37
- 238000002156 mixing Methods 0.000 claims description 31
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 239000008149 soap solution Substances 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 4
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims description 3
- 229920001038 ethylene copolymer Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
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- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 3
- 239000011118 polyvinyl acetate Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000012790 adhesive layer Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 4
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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
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to the technical field of emulsified asphalt, and provides non-stick wheel emulsified asphalt which comprises the following components in parts by mass: 20-40 parts of matrix asphalt, 10-30 parts of hard asphalt, 0.1-5 parts of polymer modifier, 1-3 parts of asphalt emulsifier, 5-15 parts of acid regulator and 17-60 parts of water; the polymer modifier comprises devulcanized activated rubber powder. The invention also provides a preparation method and a construction process of the non-stick wheel emulsified asphalt. The non-stick wheel emulsified asphalt has the characteristic of non-stick wheels, avoids the damage of construction vehicles to the adhesive layer material, improves the bonding efficiency and the bonding strength, and also improves the durability of the pavement.
Description
Technical Field
The invention relates to the technical field of emulsified asphalt, in particular to non-stick wheel emulsified asphalt, a preparation method and a construction process thereof.
Background
In the road engineering construction process, a process of spreading adhesive layer materials is generally adopted between adjacent structural layers, and the process has the effects of completely adhering an upper asphalt layer, a lower asphalt layer or an asphalt layer and a structure into a whole, and promoting the formation of an integral stress structure between the layers, so that dislocation and lateral movement of the interlayer structure caused by traffic load are reduced, the occurrence of road surface diseases is reduced, and the durability of the road surface is improved.
However, in practical engineering construction, an important reason for poor interlayer bonding effect is that after the existing adhesive layer emulsified asphalt is sprayed, even if the existing adhesive layer emulsified asphalt is completely demulsified and formed, the existing adhesive layer emulsified asphalt is still often rolled by wheels of a construction vehicle and then taken away, so that the loss of bonding layer materials is caused, the bonding effect is reduced, and meanwhile, the adhered emulsified asphalt also causes pollution to the surrounding environment. In addition, the existing sticky layer emulsified asphalt has long demulsification time, after spreading, a construction unit usually waits for a plurality of hours, and the spreading vehicle can be allowed to enter for spreading the mixture, so that the construction efficiency is reduced.
Therefore, the emulsified asphalt which is not adhered to wheels, is quick to crack and set and improves the bonding strength is obtained through research, and has important economic value.
Disclosure of Invention
The invention aims to provide non-sticky wheel emulsified asphalt, a preparation method and a construction process thereof, aiming at the technical problems of easy sticky wheel, insufficient cohesive force strength, low construction efficiency caused by low demulsification speed and the like of sticky layer emulsified asphalt in the prior art, so as to realize the purposes of non-sticky wheel, quick cracking and quick setting and improving the cohesive strength.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides non-stick wheel emulsified asphalt, which comprises the following components in parts by mass: 20-40 parts of matrix asphalt, 10-30 parts of hard asphalt, 0.1-5 parts of polymer modifier, 1-3 parts of asphalt emulsifier, 5-10 parts of acid regulator and 12-64 parts of water;
the polymer modifier comprises devulcanized activated rubber powder.
Preferably, the polymer modifier comprises devulcanized activated rubber powder and an emulsion.
Preferably, the emulsion is one or more of pure acrylic emulsion, vinyl acetate emulsion, styrene-acrylic emulsion, polyurethane emulsion, silicone-acrylic emulsion, polyvinyl acetate emulsion, vinyl acetate-ethylene copolymer emulsion and neoprene emulsion.
Preferably, the matrix asphalt and the hard asphalt are petroleum asphalt, the penetration of the matrix asphalt is 60-90 dmm, and the penetration of the hard asphalt is 5-20 dmm.
Preferably, the asphalt emulsifier is a quick-crack asphalt emulsifier; the acid regulator is hydrochloric acid or phosphoric acid solution.
Preferably, the asphalt emulsifier is a cationic asphalt emulsifier.
The invention also provides a preparation method of the non-stick wheel emulsified asphalt, which comprises the following steps:
1) Mixing matrix asphalt, hard asphalt and a polymer modifier to obtain blended polymer modified asphalt;
2) Mixing an asphalt emulsifier, an acid regulator and water to obtain a soap solution;
3) And shearing the blended polymer modified asphalt and the soap solution to obtain the non-sticky emulsified asphalt.
Preferably, the temperature of the mixing in the step 1) is 150-160 ℃, and the mixing time is 0.3-1 h; the temperature of the mixing in the step 2) is 50-60 ℃.
The invention also provides a construction process of the non-stick wheel emulsified asphalt, which comprises the step of sprinkling the non-stick wheel emulsified asphalt on an asphalt pavement layer or between asphalt pavement layersAdding asphalt layers between cement pavements; the sprinkling amount is 0.4-1.0 kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The temperature of the sprinkling cloth is 20-80 ℃.
The beneficial effects of the invention include the following points:
1) The invention adopts the desulfurization activated rubber powder and the emulsion as the polymer modifier, can quickly form a film on the liquid level of the emulsified asphalt after spraying at normal temperature, adsorbs and seals light components in the asphalt, and can improve the interfacial strength, thereby reducing the adhesion of the asphalt to the tire. At high temperatures, the tie layer is softened by the hot asphalt mixture, thereby restoring the adhesion. In addition, the desulfurization activated rubber powder is prepared from waste tires, and has the effects of energy conservation, emission reduction, low carbon and environmental protection.
2) The asphalt emulsifier adopted by the invention is a quick-cracking asphalt emulsifier, so that the effects of quick demulsification and surface drying can be achieved, the demulsification and surface drying can be realized within 30min, and the demulsification is controlled by temperature, so that the controllability is strong.
3) The non-stick wheel emulsified asphalt has the characteristic of non-stick wheels, avoids the damage of construction vehicles to the adhesive layer material, improves the bonding efficiency and the bonding strength, and also improves the durability of the pavement.
Drawings
FIG. 1 is a graph showing the adhesion phenomenon of the non-stick wheel emulsified asphalt of example 3;
FIG. 2 is a field process test of the emulsion breaking and surface drying effects of the non-stick wheel emulsified asphalt of example 3;
FIG. 3 is a field process test of adhesion of the non-stick wheel emulsified asphalt of example 3.
Detailed Description
The invention provides non-stick wheel emulsified asphalt, which comprises the following components in parts by mass: 20-40 parts of matrix asphalt, 10-30 parts of hard asphalt, 0.1-5 parts of polymer modifier, 1-3 parts of asphalt emulsifier, 5-10 parts of acid regulator and 12-64 parts of water;
the polymer modifier comprises devulcanized activated rubber powder.
The wheel-tack-free emulsified asphalt of the present invention contains 20 to 40 parts of a base asphalt, preferably 25 to 35 parts, and more preferably 30 parts.
The wheel-tack-free emulsified asphalt of the present invention contains 10 to 30 parts of a hard asphalt, preferably 15 to 25 parts, and more preferably 20 parts.
The matrix asphalt and the hard asphalt are petroleum asphalt, and the penetration degree of the matrix asphalt is preferably 60-90 dmm, more preferably 65-85 dmm, and even more preferably 70-80 dmm; the penetration of the hard pitch is preferably 5 to 20dmm, more preferably 10 to 18dmm, still more preferably 12 to 15dmm.
In the invention, the blended asphalt formed by doping the matrix asphalt and the hard asphalt is required to meet the following requirements of softening point and penetration, wherein the softening point of the blended asphalt is more than or equal to 55 ℃, and the penetration (25 ℃,100g,5 s) is less than or equal to 30dmm.
The wheel-tack-free emulsified asphalt of the present invention contains 0.1 to 5 parts of a polymer modifier, preferably 0.8 to 4 parts, and more preferably 1.5 to 3 parts.
The polymer modifier of the present invention preferably comprises devulcanized activated rubber powder and emulsion; the emulsion is preferably one or more of pure acrylic emulsion, vinyl acetate acrylic emulsion, styrene acrylic emulsion, polyurethane emulsion, silicone acrylic emulsion, polyvinyl acetate emulsion, vinyl acetate-ethylene copolymer emulsion and neoprene emulsion.
In the invention, the desulfurization activated rubber powder is preferably obtained by mixing waste tire rubber powder, a desulfurizing agent, an activating agent and an anti-aging agent in a heating way and then banburying.
In the invention, the mass ratio of the junked tire rubber powder to the desulfurizing agent to the activating agent to the anti-aging agent is preferably 90-95: 2 to 4:1 to 3:0.1 to 0.3, more preferably 92 to 93:3:2:0.2; the particle size of the waste tire rubber powder is preferably 70-100 meshes, and further preferably 80-90 meshes; the desulfurizing agent is preferably a desulfurizing agent rvs; the activator is preferably activator 8501; the antioxidant is preferably antioxidant 4010NA, antioxidant IPPD or antioxidant EPPD.
In the present invention, the temperature of the heating and mixing is preferably 70 to 85 ℃, and more preferably 75 to 80 ℃; the heating and mixing time is preferably 12 to 18 minutes, more preferably 14 to 16 minutes; the heating and mixing are preferably carried out at a rate of 30 to 50 r/min; the internal mixing temperature is preferably 175-185 ℃, more preferably 177-182 ℃, and even more preferably 180 ℃; the internal mixing time is preferably 25 to 35 minutes, more preferably 27 to 32 minutes, and still more preferably 30 minutes; the rotation speed of the internal mixing is preferably 50 to 60r/min, more preferably 52 to 58r/min, and still more preferably 55 to 56r/min.
The wheel-tack-free emulsified asphalt of the present invention contains 1 to 3 parts of an asphalt emulsifier, preferably 1.5 to 2.5 parts, and more preferably 2 parts.
The asphalt emulsifier of the invention is preferably a quick-crack asphalt emulsifier, and is further preferably a cationic quick-crack asphalt emulsifier.
The wheel-tack-free emulsified asphalt of the present invention contains 5 to 10 parts of an acid regulator, preferably 6 to 9 parts, and more preferably 7 to 8 parts.
The acid regulator is preferably hydrochloric acid or phosphoric acid solution; the mass concentrations of the hydrochloric acid and phosphoric acid solutions are independently preferably 30 to 35%, and more preferably 32 to 33%.
The wheel-tack-free emulsified asphalt of the present invention contains 12 to 64 parts of water, preferably 20 to 55 parts, and more preferably 25 to 50 parts.
The matrix asphalt, the hard asphalt, the emulsion, the asphalt emulsifier and the acid regulator are all commercial products or are prepared by methods known in the art.
The invention also provides a preparation method of the non-stick wheel emulsified asphalt, which comprises the following steps:
1) Mixing matrix asphalt, hard asphalt and a polymer modifier to obtain blended polymer modified asphalt;
2) Mixing an asphalt emulsifier, an acid regulator and water to obtain a soap solution;
3) And shearing the blended polymer modified asphalt and the soap solution to obtain the non-sticky emulsified asphalt.
In the present invention, the temperature of the mixing in step 1) is preferably 150 to 160 ℃, more preferably 152 to 158 ℃, and even more preferably 155 to 156 ℃; the mixing time is preferably 0.3 to 1 hour, more preferably 0.5 to 0.8 hour; the temperature of the mixing in step 2) is preferably 50 to 60 ℃, more preferably 52 to 58 ℃, still more preferably 55 to 56 ℃.
In the present invention, the mixing in step 1) is preferably performed by mixing the base asphalt and the hard asphalt and then mixing the mixture with the polymer modifier.
The invention also provides a construction process of the non-stick wheel emulsified asphalt, which is to spread the non-stick wheel emulsified asphalt on an asphalt pavement layer or between asphalt layers of a cement pavement.
In the present invention, the amount of the sprinkling cloth is preferably 0.4 to 1.0kg/m 2 More preferably 0.5 to 0.9kg/m 2 More preferably 0.6 to 0.8kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The temperature of the sprinkling is preferably 20 to 80 ℃, more preferably 30 to 70 ℃.
In the invention, the sprinkling amount is 0.4-0.6 kg/m 2 The effects of wheel adhesion prevention and bonding strength improvement can be achieved; if the sprinkling amount is increased to 0.6-1.0 kg/m 2 And the method can also fill up tiny cracks of the lower layer and delay the generation of reflection cracks.
In the invention, the emulsified asphalt is used as an adhesive layer between asphalt pavement layers or between asphalt layers of cement pavement.
The preparation method and the construction process of the non-stick emulsified asphalt are simple and convenient, and are suitable for large-scale application.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Waste tire rubber powder (particle size is 75 meshes), a desulfurizing agent rvs, an activating agent 8501 and an anti-aging agent 4010NA according to the mass ratio of 90:2:1:0.1, heating the mixture at 75 ℃ at a rate of 30r/min for 18min, and banburying at 177 ℃ at a rate of 50r/min for 32min to obtain the desulfurization activated rubber powder.
Heating 37 parts of medium petrochemical No. 90 asphalt and 12 parts of petroleum No. 10 asphalt to 152 ℃, stirring and mixing uniformly at the speed of 30r/min, keeping 152 ℃, adding 1 part of desulfurization activated rubber powder, mixing and swelling for 1h at 152 ℃, and shearing and overgrinding to obtain the blended polymer modified asphalt.
1 part of cation quick-release asphalt emulsifier SM-LF is dissolved in 43 parts of 52 ℃ water, 6 parts of hydrochloric acid (the mass concentration is 36%) is added, and the mixture is uniformly mixed at 52 ℃ to obtain soap solution.
And shearing the blended polymer modified asphalt and the soap solution by a colloid mill to obtain the non-sticky emulsified asphalt.
Example 2
The method comprises the steps of mixing junked tire rubber powder (with the particle size of 95 meshes), a desulfurizing agent rvs, an activating agent 8501 and an anti-aging agent IPPD according to the mass ratio of 95:4:3:0.3, heating the mixture at a temperature of 85 ℃ and a speed of 50r/min for 12min, and banburying at a temperature of 182 ℃ and a speed of 60r/min for 25min to obtain the desulfurization activated rubber powder.
25 parts of SK 70 asphalt and 15 parts of 20 petroleum asphalt are heated to 160 ℃, stirred and mixed uniformly at the speed of 30r/min, 160 ℃ is kept, 3 parts of desulfurization activated rubber powder and 2 parts of styrene-acrylic emulsion Acronal S400F ap (solid content of 57%) are added, mixed and swelled for 0.3h at 160 ℃, and shearing and overgrinding are carried out, thus obtaining the blended polymer modified asphalt.
3 parts of cation quick-release asphalt emulsifier SM-LF is dissolved in 42 parts of 58 ℃ water, 10 parts of phosphoric acid aqueous solution (the mass concentration is 35%) is added, and the mixture is uniformly mixed at 58 ℃ to obtain soap solution.
And shearing the blended polymer modified asphalt and the soap solution by a colloid mill to obtain the non-sticky emulsified asphalt.
Example 3
The method comprises the steps of mixing junked tire rubber powder (with the particle size of 80 meshes), a desulfurizing agent rvs, an activating agent 8501 and an anti-aging agent EPPD according to a mass ratio of 92:3:2:0.2, heating the mixture at 78 ℃ at a rate of 40r/min for 15min, and banburying at 180 ℃ at a rate of 55r/min for 30min to obtain the desulfurization activated rubber powder.
Heating 30 parts of medium petrochemical No. 90 asphalt and 20 parts of petroleum No. 10 asphalt to 155 ℃, stirring and mixing uniformly at the speed of 40r/min, keeping 155 ℃, adding 1 part of desulfurization activated rubber powder and 1 part of vinyl acetate-acrylic emulsion GL-350, mixing and swelling for 0.5h at 155 ℃, shearing and overgrinding to obtain the blended polymer modified asphalt.
2 parts of cation quick-splitting asphalt emulsifier SM-LF is dissolved in 55 ℃ water, 8 parts of hydrochloric acid (the mass concentration is 33%) is added, and the mixture is uniformly mixed at 55 ℃ to obtain soap solution.
And shearing the blended polymer modified asphalt and the soap solution by a colloid mill to obtain the non-sticky emulsified asphalt.
The non-stick wheel emulsified asphalt of examples 1 to 3 was applied to the spreading of the adhesive layer between asphalt pavement layers at 20℃and a spreading amount of 0.8kg/m 2 The asphalt mixture is sprayed between asphalt pavement layers, and is compared with common emulsified asphalt (30 parts of medium petrochemical 90 # asphalt and 1 part of vinyl acetate-acrylic emulsion GL-350 are mixed and swelled for 0.5h at 155 ℃ and obtained by shearing and overgrinding), and the surface drying test results are shown in table 1. As is clear from Table 1, the non-sticky wheel emulsified asphalt obtained in examples 1 to 3 was demulsified and surface dried within 30 minutes at an air temperature of 20℃and was not sticky to hands. The common adhesive layer emulsified asphalt can be dried after 60 minutes, and is easy to adhere to hands.
Table 1 dry test comparative test
The surface drying and adhesion phenomena of the non-stick wheel emulsified asphalt of example 3 were tested in the indoor test and in-situ process, respectively, and the results are shown in fig. 1 to 3. The non-stick property of the emulsified asphalt is tested indoors according to 0.5kg/m 2 The uniformly sprayed asphalt is sprayed on a chopping board, and the uniformly sprayed emulsified asphalt is put into a 60 ℃ oven for 30min and then taken out for testing, and as can be seen from figure 1, the non-sticking wheel emulsified asphalt is pressed hard to be non-asphalt adhesion, and the whole non-sticking wheel state is achieved. In the field implementation process, the emulsified asphalt is mixed according to 0.5kg/m 2 The sprinkling amount is uniformly sprinkled among asphalt pavement layers, and demulsification, surface drying effect and adhesion phenomenon are observed for 30 min. As can be seen from fig. 2, the emulsified asphalt is demulsified within 30min in the field implementation process, and the emulsified asphalt is surface dried; as can be seen from fig. 3, the rolling of the vehicle is performed without adhesion phenomenon, and the whole vehicle reaches the non-adhesion wheel.
The non-stick wheel emulsified asphalt and the normal emulsified asphalt of example 3 were subjected to a drawing test (the non-stick wheel emulsified asphalt and the normal emulsified asphalt of example 3 were respectively tested four times, averaged) and the cohesive strength of the emulsified asphalt was tested at 10 ℃ and 20 ℃ and the results are shown in table 2.
TABLE 2 pullout test results
As can be seen from Table 2, the bonding strength of the non-stick wheel emulsified asphalt of the invention is higher than that of the common emulsified asphalt; and the adhesive has the characteristics of small strength reduction amplitude along with temperature rise and excellent interlayer adhesive property.
The non-sticky wheel emulsified asphalt has high strength and small influence of temperature after demulsification and molding, and can be sprayed in a large amount without worrying about oil-flooding diseases caused by layering; increase the spraying quantity (0.6-1.0 kg/m) 2 ) Forming a hard coating on the pavement, penetrating the emulsion into the micro cracks of the pavement, closing the gaps and delaying the development of the cracks; the pavement micro-crack-resistant coating is particularly suitable for the situation that the pavement has micro-cracks (less than or equal to 2 mm) and has diseases with crack development trend; the combination of thick spraying and the process of heating and paving asphalt concrete can greatly prolong the service life of the pavement.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The non-stick emulsified asphalt is characterized by comprising the following components in parts by mass: 20-40 parts of matrix asphalt, 10-30 parts of hard asphalt, 0.1-5 parts of polymer modifier, 1-3 parts of asphalt emulsifier, 5-10 parts of acid regulator and 12-64 parts of water;
the polymer modifier comprises devulcanized activated rubber powder.
2. The non-stick emulsified asphalt of claim 1, wherein the polymer modifier comprises a devulcanized activated rubber powder and an emulsion.
3. The non-stick emulsified asphalt as set forth in claim 2, wherein the emulsion is one or more of a pure acrylic emulsion, an acrylic emulsion, a styrene acrylic emulsion, a polyurethane emulsion, a silicone acrylic emulsion, a polyvinyl acetate emulsion, a vinyl acetate-ethylene copolymer emulsion, and a neoprene emulsion.
4. A non-stick wheel emulsified asphalt as set forth in claim 1 or 3, wherein the base asphalt and the hard asphalt are both petroleum asphalt, the base asphalt having a penetration of 60 to 90dmm, and the hard asphalt having a penetration of 5 to 20dmm.
5. The non-stick wheel emulsified asphalt of claim 4, wherein the asphalt emulsifier is a fast-cracking asphalt emulsifier; the acid regulator is hydrochloric acid or phosphoric acid solution.
6. The non-stick emulsified asphalt of claim 5, wherein the asphalt emulsifier is a cationic asphalt emulsifier.
7. The method for preparing non-stick emulsified asphalt as set forth in any one of claims 1 to 6, comprising the steps of:
1) Mixing matrix asphalt, hard asphalt and a polymer modifier to obtain blended polymer modified asphalt;
2) Mixing an asphalt emulsifier, an acid regulator and water to obtain a soap solution;
3) And shearing the blended polymer modified asphalt and the soap solution to obtain the non-sticky emulsified asphalt.
8. The method according to claim 7, wherein the temperature of the mixing in step 1) is 150 to 160 ℃ and the mixing time is 0.3 to 1h; the temperature of the mixing in the step 2) is 50-60 ℃.
9. The construction process of non-stick emulsified asphalt according to any one of claims 1 to 6, wherein the non-stick emulsified asphalt is sprayedThe asphalt pavement layer or the asphalt pavement layer is additionally paved between asphalt layers; the sprinkling amount is 0.4-1.0 kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The temperature of the sprinkling cloth is 20-80 ℃.
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| CN103881401A (en) * | 2013-07-23 | 2014-06-25 | 华东理工大学 | Waste rubber powder-modified emulsified asphalt and preparation method thereof |
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