CN117343550A - High-temperature stable storage-resistant non-stick emulsified asphalt and preparation method thereof - Google Patents
High-temperature stable storage-resistant non-stick emulsified asphalt and preparation method thereof Download PDFInfo
- Publication number
- CN117343550A CN117343550A CN202311242657.4A CN202311242657A CN117343550A CN 117343550 A CN117343550 A CN 117343550A CN 202311242657 A CN202311242657 A CN 202311242657A CN 117343550 A CN117343550 A CN 117343550A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- emulsified asphalt
- stick
- emulsified
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 249
- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- 238000003860 storage Methods 0.000 title claims abstract description 31
- 239000011159 matrix material Substances 0.000 claims abstract description 38
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003607 modifier Substances 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000004480 active ingredient Substances 0.000 claims abstract description 3
- 239000008149 soap solution Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 24
- 239000000084 colloidal system Substances 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 229920005749 polyurethane resin Polymers 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 10
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 150000003973 alkyl amines Chemical class 0.000 claims description 2
- -1 alkyl quaternary ammonium salt Chemical class 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 239000012790 adhesive layer Substances 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 32
- 239000010410 layer Substances 0.000 description 20
- 238000005336 cracking Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 229920001971 elastomer Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 5
- 238000004945 emulsification Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
- C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
-
- 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
Landscapes
- 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)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The application discloses a preparation method of high-temperature stable storage-resistant non-stick emulsified asphalt, which aims to solve the technical problems of difficult storage of emulsified asphalt and sticking of the emulsified asphalt at high temperature. The high-temperature stable storage-resistant non-stick emulsified asphalt comprises the following active ingredients of mixed asphalt, an emulsifier, a stabilizer, a surface modifier and water according to 45% -55%: 0.3% -0.6%: 0.1% -0.4%: 2% -6%: 38 to 51.6 weight percent; wherein, the mixed asphalt consists of 70# matrix asphalt and low-grade asphalt according to the mass ratio of 1:1.5-4. The high-temperature stable storage-resistant non-stick wheel emulsified asphalt provided by the application can solve the problem that an emulsified asphalt adhesive layer and a construction vehicle stick wheels under the high-temperature condition, has better storage stability, and solves the problem of short storage time of the emulsified asphalt. The preparation method is simple and feasible, has relatively low cost, simple and easily available raw materials, strong operability in the mixing process and low price cost, and has market popularization value.
Description
Technical Field
The invention relates to the technical field of road pavement building materials, in particular to a preparation method of high-temperature stable storage-resistant non-stick emulsified asphalt.
Background
At present, the concrete pavement is the most widely used pavement form, and more than 90% of highways adopt asphalt pavement. The structural design of asphalt pavement in China is mainly based on the layered elastic system theory, and the main assumption precondition of the theory is that each spreading layer is made of continuous and homogeneous materials, and all layers are tightly connected without friction force. However, in the actual construction process, the layers of the asphalt pavement are discontinuous, and the layers of the asphalt pavement must be bonded together by selecting a proper material. The advantages and disadvantages of the interlayer bonding material have great influence on the performance of the asphalt pavement, the interlayer bonding material is selected to be favorable for forming a complete whole of each structural layer of the pavement, reduce the infiltration of moisture and strengthen the stress diffusion of the structure, and the interlayer bonding material is an important factor influencing the service life and the maintenance period of the pavement and has a non-negligible effect. If the interlayer bonding material is improperly selected, the integrity of the pavement structure can be affected, pavement damage is easy to occur, and the service life of the pavement is reduced.
In engineering practical construction, emulsified asphalt is the most commonly used adhesive among layers of asphalt pavement, and is sprayed between adjacent layers of structures, so that the adhesive performance among the layers of structures of the pavement can be enhanced, and the whole pavement has better durability and good structural bearing capacity. As the common asphalt is a material with larger temperature sensitivity, the asphalt is high Wen Faruan, is easy to flow and has strong viscosity, so that the engineering vehicle for paving the mixture on the upper layer of the adhesive layer runs on the road surface covered with the emulsified asphalt in the construction season of asphalt concrete road in summer, the phenomenon that the adhesive layer of the emulsified asphalt is rolled by the construction vehicle and then the wheels are adhered is caused. The adhesive layer at the wheel track belt is taken away by the wheels, so that the emulsified asphalt layer of the pavement is partially lost, the adhesive performance between the subsequent paving layers is reduced, and diseases such as slippage, hugs, rutting, cracks and the like are easy to occur, so that the asphalt pavement is damaged.
In the road construction process in summer, the phenomenon of adhering the emulsified asphalt spread on the road surface is more obvious due to overhigh temperature. Low grade asphalt and polymer modifiers are commonly used in the art to address the high temperature sticking of the wheels to the tack layer. However, low-grade asphalt is generally prepared by blending crude oil with poor oil quality, and the performance of the low-grade asphalt is hardly ensured; the direct use of low grade bitumen preparation has the problems of poor storage stability and high temperature sticking to the wheels.
While the addition of the modifier has a small dosage, the softening point of evaporation residues of the emulsified asphalt is limited to be improved, but the addition of the polymer modifier in a large proportion makes the emulsified asphalt cost too high, so that the emulsified asphalt is difficult to apply to practical engineering. Therefore, a preparation method of the storage-resistant high-temperature stable non-sticking emulsified asphalt is needed at present so as to solve the problems that the emulsified asphalt is difficult to store and stick to a wheel at high temperature.
The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art.
Disclosure of Invention
The application provides a preparation method of high-temperature stable storage-resistant non-stick emulsified asphalt, which aims to solve the problems that the emulsified asphalt is difficult to store and sticks to wheels at high temperature.
According to one aspect of the present disclosure, there is provided a high temperature stable storage-resistant non-stick wheel emulsified asphalt, the active ingredients of which are mixed asphalt, an emulsifier, a stabilizer, a surface modifier and water in a proportion of 45% -55%: 0.3% -0.6%: 0.1% -0.4%: 2% -6%: 38 to 51.6 mass percent;
wherein, the mixed asphalt consists of 70# matrix asphalt and low-grade asphalt according to the mass ratio of 1:1.5-4.
In some embodiments of the present disclosure, the low grade asphalt is any one of 20#, 15#, 10# asphalt.
In some embodiments of the present disclosure, the emulsifier is at least one of an alkylamine emulsifier, an alkyl quaternary ammonium salt emulsifier, an amide polyamine emulsifier. And as the amount of the emulsifier increases, the residual quantity on the sieve of the prepared emulsified asphalt becomes smaller, which indicates that the fineness of the emulsified asphalt becomes better, the asphalt matrix is completely emulsified, and the stability becomes better.
According to another aspect of the disclosure, the stabilizer is at least one of calcium chloride and magnesium chloride.
In some embodiments of the present disclosure, the surface modifier is at least one of an aqueous epoxy resin, an aqueous polyurethane resin, an aqueous acrylic resin.
In some embodiments of the present disclosure, the surface modifier has a solids content of 50% to 70%; the surface modifier is a polar molecule, one end is oleophilic, the other end is hydrophilic, the compatibility between soap solution and asphalt can be increased by the surface modifier molecule, so that the storage stability of emulsified asphalt is improved, after emulsion breaking of the emulsified asphalt, the polar molecule can migrate to the upper surface along with evaporation of water to form a thermoplastic isolation layer, when a construction vehicle is rolled, the tire and the adhesive layer cannot be bonded due to the effect of the isolation layer, and a non-adhesive wheel can be achieved by a small dose of the surface modifier.
According to another aspect of the present disclosure, there is provided a method for preparing high-temperature stable storage-resistant non-stick emulsified asphalt, comprising the steps of:
(1) Preparation of mixed asphalt: heating 70# matrix asphalt and low-grade asphalt to 145-160 ℃, mixing according to the mass ratio of 1:1.5-4, stirring and heating to 145-160 ℃, thus obtaining the asphalt;
(2) Preparation of emulsified asphalt soap solution: adding the emulsifier into water to thoroughly dissolve, adding the stabilizer, stirring uniformly, and adjusting the pH to 2-3 by using the acid agent to obtain the water-based emulsion;
the stabilizer is added into the soap solution to optimize the emulsification effect, the inorganic stabilizer is matched with the quick-cracking emulsifier, the emulsification effect of the soap solution is better, and the stability of the emulsified asphalt is better;
(3) Preparation of emulsified asphalt: placing the emulsified asphalt soap solution into a preheated colloid mill for circulation for 50-70 s, and then adding mixed asphalt into the colloid mill for circulation for 100-140 s to obtain the asphalt soap solution;
(4) Preparation of non-stick emulsified asphalt: pouring the emulsified asphalt into a container, continuously stirring at a low speed under an electric stirrer, dripping a surface modifier into the container, and stirring at a high speed for 30-60 min to obtain the asphalt.
In some embodiments of the disclosure, in step (2), the acid agent is hydrochloric acid.
In some embodiments of the present disclosure, in said step (3), the colloid mill is preheated to 70-90 ℃.
In some embodiments of the present disclosure, in the step (4), the rotation speed of the electric stirrer at the low speed stirring is 200-500 r/min, and the rotation speed at the high speed stirring is 400-800 r/min.
One or more technical solutions provided in the embodiments of the present application at least have any one of the following technical effects or advantages:
1. the mixed asphalt prepared by adopting the No. 70 matrix asphalt and the low-grade matrix asphalt is hard asphalt, and the basic performance of the mixed asphalt is obviously superior to that of the matrix asphalt with the corresponding grade. The 70# matrix asphalt and the low-grade matrix asphalt can improve the viscosity of the non-stick wheel emulsified asphalt, enhance the deformation resistance and adapt to different climatic conditions simultaneously through the cooperation, can be used at high and low temperatures, and can improve the strength and the durability of the whole asphalt mixture through the cooperation, so that the service life of a pavement is prolonged.
2. The mixed asphalt prepared from the 70# matrix asphalt and the low-grade matrix asphalt improves the basic performance of the low-grade asphalt by adding the 70# matrix asphalt, and the preparation method is simple and feasible, has relatively low cost, simple and easily-obtained raw materials, strong operability in the mixing process, low price and low cost, and has market popularization value.
3. In the application, the quick-cracking emulsifier is added in the process of preparing the emulsified asphalt soap solution, so that emulsified asphalt can be completely demulsified within about 10 minutes, the emulsification efficiency is high, and asphalt particles can be effectively dispersed in water to form stable and uniform emulsion; the high-temperature asphalt has good stability at high temperature, and improves the storage and use performances of emulsified asphalt.
4. In the application, the quick-cracking emulsifier and the stabilizer are added in the process of preparing the emulsified asphalt soap solution, and the two can be used for enabling the emulsion effect of the soap solution to be better through the cooperation, so that the stability of the emulsified asphalt can be better, and the storage stability of the emulsified asphalt at high temperature can be improved.
5. The added surface modifier molecules are polar molecules, the cohesion of the material is high, and the emulsified asphalt automatically migrates to the surface of the asphalt in the process of evaporating water to form a thermoplastic isolation layer, so that the softening point of evaporation residues of the emulsified asphalt is improved; the surface modifier molecule has one end with oleophylic and one end with hydrophilic, so that the combination of asphalt and soap solution is tighter, the stability of the non-sticky emulsified asphalt is better, and the non-sticky emulsified asphalt at 65 ℃ can be ensured.
6. The high-temperature stable storage-resistant non-stick wheel emulsified asphalt provided by the application can be used for preparing a non-stick wheel emulsified asphalt adhesive layer (namely an asphalt pavement adhesive layer), so that the problem that an emulsified asphalt adhesive layer and a construction vehicle adhere to wheels under the high-temperature condition is solved, meanwhile, the high-temperature stable storage-resistant non-stick wheel emulsified asphalt has good storage stability, and the problem that the storage time of the emulsified asphalt is short is solved.
Drawings
FIG. 1 is a triaxial apparatus used in testing shear strength in a high temperature stable storage-stable non-stick wheel emulsified asphalt binder according to one embodiment of the present application.
Detailed Description
The following examples are given to illustrate the invention in detail, but are not intended to limit the scope of the invention in any way.
The instruments and devices referred to in the following examples are conventional instruments and devices unless otherwise specified; the preparation methods are conventional methods unless otherwise specified.
Example 1
(1) Preparation of mixed asphalt: 150g of matrix asphalt (70 # and) and 350g of matrix asphalt (15 #) are heated to 145 ℃ in an oven, so that the two matrix asphalt have better fluidity, then 150g of hot 70# matrix asphalt is poured into 350g of hot 30# matrix asphalt to obtain 500g of mixed asphalt, uniformly stirred for 2 hours and heated to 145 ℃, so that the mixed asphalt has better fluidity, and the mixed asphalt is kept warm for later use.
(2) Preparation of emulsified asphalt soap solution: 5.3g of quick-crack emulsifier and 2.1g of stabilizer anhydrous CaCl 2 Adding into 500ml of 50 ℃ water, and fully stirring until the cationic quick-cracking emulsifier and anhydrous CaCl 2 Thoroughly dissolving, quick-cracking emulsifier and anhydrous CaCl 2 The usage amount of the water-based asphalt emulsion is 0.5% and 0.2% of the emulsified asphalt mass respectively, then hydrochloric acid with standard concentration is used for adjusting the pH value of the mixed solution to 2.5, so that the final soap solution is obtained, and the water area is kept warm for standby.
(3) Preparation of emulsified asphalt: preheating a colloid mill to 65 ℃, pouring 460g of prepared soap solution into the colloid mill for circulation for 1min, slowly adding 424g of mixed asphalt (145 ℃) into the colloid mill for circulation for 2 min, obtaining about 800g of emulsified asphalt, and cooling to room temperature for standby.
(4) Preparation of non-stick emulsified asphalt: pouring 600g of emulsified asphalt into a container, placing the container filled with the emulsified asphalt under a 300r/min electric stirrer for continuous stirring, slowly dripping water-based polyurethane resin, wherein the adding amount of the water-based polyurethane resin is 3% of the mass of the emulsified asphalt, and after the dripping of the water-based polyurethane resin is completed, regulating the rotating speed of an electric high-speed shear tester to 500r/min and stirring for 30min to obtain the emulsified asphalt.
Example two
(1) Preparation of mixed asphalt: 150g of matrix asphalt (70 # and) and 350g of matrix asphalt (15 #) are heated to 145 ℃ in an oven, so that the two matrix asphalt have better fluidity, then 150g of hot 70# matrix asphalt is poured into 350g of hot 30# matrix asphalt to obtain 500g of mixed asphalt, uniformly stirred for 2 hours and heated to 145 ℃, so that the mixed asphalt has better fluidity, and the mixed asphalt is kept warm for later use.
(2) EmulsificationPreparation of bitumen soap solution: 5.3g of quick-crack emulsifier and 2.1g of stabilizer anhydrous CaCl 2 Adding into 500ml of 50 ℃ water, and fully stirring until the cationic quick-cracking emulsifier and anhydrous CaCl 2 Thoroughly dissolving, quick-cracking emulsifier and anhydrous CaCl 2 The usage amount of the water-based asphalt emulsion is 0.5% and 0.2% of the emulsified asphalt mass respectively, then hydrochloric acid with standard concentration is used for adjusting the pH value of the mixed solution to 2.5, so that the final soap solution is obtained, and the water area is kept warm for standby.
(3) Preparation of emulsified asphalt: preheating a colloid mill to 65 ℃, pouring 460g of prepared soap solution into the colloid mill for circulation for 1min, slowly adding 424g of mixed asphalt (145 ℃) into the colloid mill for circulation for 2 min, obtaining about 800g of emulsified asphalt, and cooling to room temperature for standby.
(4) Preparation of non-stick emulsified asphalt: and pouring 600g of emulsified asphalt into a container, placing the container filled with the emulsified asphalt under a 300r/min electric stirrer for continuous stirring, slowly dripping water-based polyurethane resin, wherein the adding amount of the water-based polyurethane resin is 4% of the mass of the emulsified asphalt, and after the dripping of the water-based polyurethane resin is completed, regulating the rotating speed of an electric high-speed shear tester to 500r/min and stirring for 30min to obtain the emulsified asphalt.
Example III
(1) Preparation of mixed asphalt: 150g of matrix asphalt (70 # and) and 350g of matrix asphalt (15 #) are heated to 145 ℃ in an oven, so that the two matrix asphalt have better fluidity, then 150g of hot 70# matrix asphalt is poured into 350g of hot 30# matrix asphalt to obtain 500g of mixed asphalt, uniformly stirred for 2 hours and heated to 145 ℃, so that the mixed asphalt has better fluidity, and the mixed asphalt is kept warm for later use.
(2) Preparation of emulsified asphalt soap solution: 5.3g of quick-crack emulsifier and 2.1g of stabilizer anhydrous CaCl 2 Adding into 500ml of 50 ℃ water, and fully stirring until the cationic quick-cracking emulsifier and anhydrous CaCl 2 Thoroughly dissolving, quick-cracking emulsifier and anhydrous CaCl 2 The usage amount of the water-based asphalt emulsion is 0.5% and 0.2% of the emulsified asphalt mass respectively, then hydrochloric acid with standard concentration is used for adjusting the pH value of the mixed solution to 2.5, so that the final soap solution is obtained, and the water area is kept warm for standby.
(3) Preparation of emulsified asphalt: preheating a colloid mill to 65 ℃, pouring 460g of prepared soap solution into the colloid mill for circulation for 1min, slowly adding 424g of mixed asphalt (145 ℃) into the colloid mill for circulation for 2 min, obtaining about 800g of emulsified asphalt, and cooling to room temperature for standby.
(4) Preparation of non-stick emulsified asphalt: pouring 600g of emulsified asphalt into a container, placing the container filled with the emulsified asphalt under a 300r/min electric stirrer for continuous stirring, slowly dripping water-based polyurethane resin, wherein the adding amount of the water-based polyurethane resin is 5% of the mass of the emulsified asphalt, and after the dripping of the water-based polyurethane resin is completed, regulating the rotating speed of an electric high-speed shear tester to 500r/min, and stirring for 30min to obtain the emulsified asphalt.
Comparative example one
(1) Preparation of asphalt: 500g of matrix asphalt (30 # is heated to 135 ℃ in an oven, so that the matrix asphalt has better fluidity and is preserved for standby.
(2) Preparation of emulsified asphalt soap solution: adding 5.3g of quick-cracking emulsifier into 500ml of 50 ℃ water, fully stirring to thoroughly dissolve the quick-cracking emulsifier, wherein the use amount of the quick-cracking emulsifier is 0.5% of the mass of emulsified asphalt, then adjusting the pH of the mixed solution to 2.5 by using hydrochloric acid with standard concentration to obtain final soap solution, and preserving the water area for later use.
(3) Preparation of emulsified asphalt: the colloid mill was preheated to 65 c, then 460g of the prepared soap solution was poured into the colloid mill and circulated for 1min, and 424g of base asphalt (30 #) (135 c) was slowly added to the colloid mill and circulated for 2 min, to obtain about 800g of emulsified asphalt.
(4) 600g of emulsified asphalt was poured into the vessel, and the vessel containing the emulsified asphalt was placed under a 500r/min electric high-speed shear tester with continuous stirring for 30min.
Comparative example two
(1) Preparation of asphalt: 500g of matrix asphalt (70 # in the following steps) is heated to 155 ℃ in an oven, so that the matrix asphalt has better fluidity, and the heat is preserved for standby.
(2) Preparation of emulsified asphalt soap solution: adding 5.3g of quick-cracking emulsifier into 500ml of 50 ℃ water, fully stirring to thoroughly dissolve the quick-cracking emulsifier, wherein the use amount of the quick-cracking emulsifier is 0.5% of the mass of emulsified asphalt, then adjusting the pH of the mixed solution to 2.5 by using hydrochloric acid with standard concentration to obtain final soap solution, and preserving the water area for later use.
(3) Preparation of emulsified asphalt: the colloid mill was preheated to 70 c, then 460g of the soap solution prepared was poured into the colloid mill and circulated for 1min, and 424g of base asphalt (70 #) (155 c) was slowly added to the colloid mill and circulated for 2 min, to obtain about 800g of emulsification.
(4) 600g of emulsified asphalt was poured into the vessel, and the vessel containing the emulsified asphalt was placed under a 500r/min electric high-speed shear tester with continuous stirring for 30min.
Results testing:
1.1 Testing of general Performance
The emulsified asphalt compositions of examples 1 to 3 of the present invention were tested by referring to JTGE20-2011, highway engineering asphalt and asphalt mixture test procedure, and the technical indexes of the emulsified asphalt compositions of examples 1 to 3 were verified and compared with those of comparative examples 1 and 2, and the test results are shown in Table 1.
Table 1 technical index of examples and comparative examples
。
As can be seen from Table 1, the storage stability of the storage-stable high-temperature emulsified asphalt of examples 1 to 3 of the present application is good, conditions are created for long-distance transportation and long-time storage of the emulsified asphalt, and the emulsified asphalt of examples 1 to 3 has a high residual softening point.
1.2 Test for dry test
Table 2 dry test comparative test
。
It can be seen from table 2 that the demulsification speeds of examples 1 to 3 are high, so that the construction is convenient, the construction efficiency is greatly improved, the traffic sealing time is reduced, and the construction time is reduced.
1.3 Non-stick wheel effect test
The application carries out non-stick wheel effect test through laboratory simulation construction vehicle rolling adhesive layer to evaluate the adhesive wheel effect after the adhesive layer spills cloth shaping.
(1) Preparing a pattern: the emulsified asphalt of examples 1-3 and comparative examples 1-2 was dispersed in an amount D of 400g/m 2 The paint is uniformly painted on a fiber reinforced cement board, and the size of the fiber reinforced cement board is 300mm multiplied by 100mm multiplied by 6mm. And (3) standing and curing the substrate coated with the emulsified asphalt in a room at normal temperature until the emulsified asphalt is fully demulsified (the surface of the emulsified asphalt coated by touching with fingers, and the emulsion is fully demulsified when the fingers are not stained with the emulsified asphalt).
(2) The operation steps are as follows:
(1) weigh and record the mass C (g, 2 bits after decimal place) of the rubber strip, the dimensions of the rubber strip being 300mm by 60mm by 1mm.
(2) The prepared base plate and rubber strip of emulsified asphalt were placed in a closed-cell water-immersed rut meter (temperature set at 65 ℃) and kept for 4 hours.
(3) The insulated base plate of emulsified asphalt was placed on a rut meter, a rubber sheet was placed on the plate and was secured at the running position of the test wheel, the test wheel was lowered, and the test wheel was run ten trips under a load of 624.+ -. 10N (ground contact pressure: 0.59 MPa).
(4) The test wheel is lifted, the fiber reinforced cement plate is taken out, one side of the rubber sheet is taken up, and the rubber sheet is lifted up within 3 seconds by a certain force.
(5) Weigh and record the mass B (g, 2 bits after decimal point) of the rubber sheet, according to the formula:the sticking rate was obtained, wherein A is the sticking rate (%), B is the mass (g) of the rubber sheet after the test, C is the mass (g) of the rubber sheet before the test, and D is the spreading amount (g/m) of the emulsified asphalt 2 ) S is the area (m) 2 ）。
As shown in Table 3, it can be seen that the high temperature stable storage-resistant wheel-sticking prevention effect of the emulsified asphalt of examples 1 to 3 is far better than that of the emulsified asphalt of comparative examples 1 and 2, and it can be found that the wheel-sticking prevention effect becomes gradually better by comparing the addition of the aqueous polyurethane resin of different proportions, and the wheel-sticking rate is less than 1% by adding 5% of the aqueous polyurethane resin with the increase of the addition amount, and the wheel-sticking prevention effect reaches a remarkable technical level.
Table 3 wheel sticking rate for each test group
。
1.4 Adhesive layer shear Strength test
The adhesive layer shear strength test is to test the adhesive strength between asphalt mixture layers and is used for evaluating the adhesive effect between the mixture layers.
(1) Preparation of the sample: the upper layer adopts AC-13 graded, the lower layer adopts AC-20 graded asphalt mixture, and the asphalt mixture is prepared according to the asphalt mixture test piece preparation method (wheel rolling method) in Highway engineering asphalt and asphalt mixture test procedure.
Firstly rolling to form a 300mm multiplied by 50mm rut test piece with the AC-20 grading of the lower layer, and uniformly sprinkling 400g/m of cloth on the rut test piece after the rut test piece is cooled to room temperature 2 The emulsified asphalt of comparative examples 1-2 and examples 1-3 was, after sufficient demulsification, spread an AC-13 graded asphalt mixture on the adhesive layer and roll-formed. After the test piece had cooled to room temperature, it was demolded and converted into a cylindrical test piece with a diameter of 100mm and a height of 100mm using a core rotating machine.
(2) Shear test: the cylindrical sample was placed in an incubator for 4 hours at 25℃and 60℃respectively. After 4 hours of incubation, the test pieces were placed in a shear test jig, and then loaded on a triaxial tester (see fig. 1), and the peak values of the test loads were recorded, with the results shown in table 4 below.
Table 4 maximum shear stress for each test group at 20 ℃ and 60 °
。
The test and the result show that the bonding strength of the non-stick wheel emulsified asphalt is stronger than that of common emulsified asphalt, and the interlayer bonding strength is gradually increased along with the increase of the addition amount of the aqueous polyurethane resin. Compared with single asphalt (only 30# matrix asphalt or only 70# matrix asphalt), the mixed asphalt prepared from 70# matrix asphalt and low-grade asphalt can improve the viscosity of the non-stick wheel emulsified asphalt through the cooperation between the two asphalt. The softening point of the 70# matrix asphalt is relatively low, and the asphalt is suitable for being used at a low temperature; the 15# matrix asphalt has a relatively high softening point, is suitable for being used at a high temperature, and can also improve the strength and the durability of the non-stick wheel emulsified asphalt, thereby prolonging the service life of the pavement.
The present application is described in detail above with reference to examples; however, it will be understood by those skilled in the art that various specific parameters of the above embodiments may be changed or equivalents may be substituted for related materials and method steps without departing from the inventive concept thereof, so as to form a plurality of specific embodiments, which are common variations of the present application and will not be described in detail herein.
Claims (10)
1. The high-temperature stable storage-resistant non-stick emulsified asphalt is characterized in that the active ingredients of the asphalt comprise mixed asphalt, an emulsifier, a stabilizer, a surface modifier and water according to 45% -55%: 0.3% -0.6%: 0.1% -0.4%: 2% -6%: 38 to 51.6 mass percent;
wherein, the mixed asphalt consists of 70# matrix asphalt and low-grade asphalt according to the mass ratio of 1:1.5-4.
2. The high temperature stable storage-resistant non-stick asphalt emulsion of claim 1 wherein the low grade asphalt is any one of 20#, 15#, 10# asphalt.
3. The high temperature stable storage-resistant non-stick emulsified asphalt according to claim 1, wherein the emulsifier is at least one of alkylamine type emulsifiers, alkyl quaternary ammonium salt type emulsifiers, and amide type polyamine type emulsifiers.
4. The high-temperature stable storage-resistant non-stick emulsified asphalt according to claim 1, wherein the stabilizer is at least one of calcium chloride and magnesium chloride.
5. The high temperature stable storage-resistant non-stick emulsified asphalt according to claim 1, wherein the surface modifier is at least one of aqueous epoxy resin, aqueous polyurethane resin, and aqueous acrylic resin.
6. The high temperature stable storage-resistant non-stick emulsified asphalt according to claim 1, wherein the surface modifier has a solid content of 50% to 70%.
7. The method for preparing the high-temperature stable storage-resistant non-stick emulsified asphalt as set forth in claim 1, which is characterized by comprising the following steps:
(1) Preparation of mixed asphalt: heating 70# matrix asphalt and low-grade asphalt to 145-160 ℃, mixing according to the mass ratio of 1:1.5-4, stirring and heating to 145-160 ℃, thus obtaining the asphalt;
(2) Preparation of emulsified asphalt soap solution: adding the emulsifier into water to thoroughly dissolve, adding the stabilizer, stirring uniformly, and adjusting the pH to 2-3 by using the acid agent to obtain the water-based emulsion;
(3) Preparation of emulsified asphalt: placing the emulsified asphalt soap solution into a preheated colloid mill for circulation for 50-70 s, and then adding mixed asphalt into the colloid mill for circulation for 100-140 s to obtain the asphalt soap solution;
(4) Preparation of non-stick emulsified asphalt: pouring the emulsified asphalt into a container, continuously stirring at a low speed under an electric stirrer, dripping a surface modifier into the container, and stirring at a high speed for 30-60 min to obtain the asphalt.
8. The method for producing wheel-non-stick emulsified asphalt according to claim 6, wherein in the step (2), the acid agent is hydrochloric acid.
9. The method for producing wheel-non-stick emulsified asphalt according to claim 6, wherein in the step (3), the colloid mill is preheated to 70 to 90 ℃.
10. The method for producing wheel-non-stick emulsified asphalt according to claim 6, wherein in the step (4), the rotation speed of the electric stirrer is 200 to 500r/min when stirring at a low speed, and 400 to 800r/min when stirring at a high speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242657.4A CN117343550A (en) | 2023-09-25 | 2023-09-25 | High-temperature stable storage-resistant non-stick emulsified asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242657.4A CN117343550A (en) | 2023-09-25 | 2023-09-25 | High-temperature stable storage-resistant non-stick emulsified asphalt and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117343550A true CN117343550A (en) | 2024-01-05 |
Family
ID=89362293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311242657.4A Pending CN117343550A (en) | 2023-09-25 | 2023-09-25 | High-temperature stable storage-resistant non-stick emulsified asphalt and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117343550A (en) |
-
2023
- 2023-09-25 CN CN202311242657.4A patent/CN117343550A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1924650B1 (en) | Bituminous paving composition and process for bituminous paving | |
| US9139733B2 (en) | Cold mix asphalt aggregate paving material | |
| CN1208393C (en) | Polymer emulsified and re-cross-linked asphalt colloid mixture and its preparing process | |
| Ahmedzade et al. | Laboratory investigation of the properties of asphalt concrete mixtures modified with TOP–SBS | |
| US8454741B2 (en) | Bituminous paving composition and process for bituminous paving | |
| CN110171942A (en) | A kind of moisturecuring response type Bituminous Pavement Cold feed supplement and preparation method thereof | |
| CN104448848B (en) | A kind of fast solidifying, not viscous glutinous coating emulsified asphalt of wheel and preparation method thereof | |
| CN105110685A (en) | High visco-elastic warming mixing modifying agent for asphalt road and production method and application of high visco-elastic warming mixing modifying agent | |
| CN106830767A (en) | A kind of bituminous paving check crack punishment regeneration sealing material and preparation method thereof | |
| CN108558272B (en) | Regenerative road cold-patch material | |
| CN104403335A (en) | Adhesive layer emulsified asphalt and preparation method thereof | |
| CN101337794A (en) | High modulus asphalt concrete and method for preparing same | |
| CN102051849A (en) | Preparation method of stone matrix asphalt mixture | |
| US20060127572A1 (en) | Method for producing a bituminous mix, in particular by cold process, and bituminous mix obtained by said method | |
| CN109267452A (en) | Mixture and its preparation method and application based on road surface reclaimed materials cold renewal | |
| CN109534723A (en) | A kind of preparation method of warm-mixed recycled asphalt mixture | |
| CN115386237B (en) | Emulsified asphalt composition for construction of non-stick wheels and preparation method thereof | |
| CN117343550A (en) | High-temperature stable storage-resistant non-stick emulsified asphalt and preparation method thereof | |
| CN101445661A (en) | Anti-rutting modified asphalt material for road and preparation method thereof | |
| CN115448642B (en) | Asphalt cold-patch material and preparation method thereof | |
| CN106047283B (en) | A kind of water-emulsion-based resin modified gap-grouting material and preparation method thereof | |
| CN102827485A (en) | Modified emulsified asphalt and preparation method thereof as well as open graded asphalt friction course (OGFC) mixed material and preparation method thereof | |
| CN107032665B (en) | A kind of bionical self-healing property asphalt and preparation method thereof | |
| CN113817333B (en) | High-viscosity modified asphalt, preparation method thereof and OGFC (one glass batch fiber reinforced plastic) asphalt mixture | |
| CN109232974A (en) | A kind of bituminous pavement reclaimed materials normal-temperature regeneration agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |