CN115975390B - High-solid-content rapid demulsification modified emulsified asphalt and preparation method thereof - Google Patents
High-solid-content rapid demulsification modified emulsified asphalt and preparation method thereof Download PDFInfo
- Publication number
- CN115975390B CN115975390B CN202310277964.XA CN202310277964A CN115975390B CN 115975390 B CN115975390 B CN 115975390B CN 202310277964 A CN202310277964 A CN 202310277964A CN 115975390 B CN115975390 B CN 115975390B
- Authority
- CN
- China
- Prior art keywords
- emulsified asphalt
- demulsification
- emulsifier
- asphalt
- solid
- 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.)
- Active
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 153
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000007787 solid Substances 0.000 claims abstract description 29
- 238000005336 cracking Methods 0.000 claims abstract description 28
- 239000004816 latex Substances 0.000 claims abstract description 27
- 229920000126 latex Polymers 0.000 claims abstract description 27
- 239000003381 stabilizer Substances 0.000 claims abstract description 27
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- -1 sucrose fatty acid ester Chemical class 0.000 claims abstract description 21
- 229930006000 Sucrose Natural products 0.000 claims abstract description 20
- 235000010489 acacia gum Nutrition 0.000 claims abstract description 20
- 239000005720 sucrose Substances 0.000 claims abstract description 20
- 229920000084 Gum arabic Polymers 0.000 claims abstract description 19
- 241000978776 Senegalia senegal Species 0.000 claims abstract description 19
- 239000000205 acacia gum Substances 0.000 claims abstract description 19
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 19
- 239000000194 fatty acid Substances 0.000 claims abstract description 19
- 229930195729 fatty acid Natural products 0.000 claims abstract description 19
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 150000001767 cationic compounds Chemical class 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000013530 defoamer Substances 0.000 claims abstract description 10
- 239000000839 emulsion Substances 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 28
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000084 colloidal system Substances 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 11
- 108010010803 Gelatin Proteins 0.000 claims description 9
- 239000008273 gelatin Substances 0.000 claims description 9
- 229920000159 gelatin Polymers 0.000 claims description 9
- 235000019322 gelatine Nutrition 0.000 claims description 9
- 235000011852 gelatine desserts Nutrition 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 8
- KFXTTZQGCNRYEN-UHFFFAOYSA-N 2-n-octadecylpropane-1,2-diamine Chemical group CCCCCCCCCCCCCCCCCCNC(C)CN KFXTTZQGCNRYEN-UHFFFAOYSA-N 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- ZDESIKLNPAKKBA-UHFFFAOYSA-N 2-(2-heptadecyl-4,5-dihydroimidazol-1-yl)ethanamine Chemical group CCCCCCCCCCCCCCCCCC1=NCCN1CCN ZDESIKLNPAKKBA-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 150000003242 quaternary ammonium salts Chemical group 0.000 claims description 6
- 150000003973 alkyl amines Chemical class 0.000 claims description 5
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims description 2
- NRWCNEBHECBWRJ-UHFFFAOYSA-M trimethyl(propyl)azanium;chloride Chemical compound [Cl-].CCC[N+](C)(C)C NRWCNEBHECBWRJ-UHFFFAOYSA-M 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000004945 emulsification Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical group Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000001785 acacia senegal l. willd gum Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000005313 fatty acid group Chemical group 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000004676 glycans Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 150000004804 polysaccharides Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Road Paving Structures (AREA)
Abstract
The invention discloses high-solid-content rapid demulsification modified emulsified asphalt and a preparation method thereof, relates to the technical field of road engineering materials, and solves the problem that the existing modified emulsified asphalt is difficult to meet higher and higher technical requirements on solid content, demulsification speed and storage stability. The invention comprises emulsified asphalt and SBS latex, wherein the addition amount of the SBS latex is 5-10% of the mass of the emulsified asphalt, and the emulsified asphalt comprises the following components in percentage by mass: 58-65% of matrix asphalt, 0.3-0.6% of cationic compound emulsifier, 0.2-0.5% of stabilizer, defoamer, 1.0-1.5% of solubilizer accounting for the mass of the matrix asphalt, and the balance of water, wherein the solubilizer is a mixture of sucrose fatty acid ester and gum arabic, and the cationic compound emulsifier comprises a middle-cracking emulsifier and at least one quick-cracking emulsifier. The invention has the advantages of high solid content, high demulsification speed, good storage stability and the like.
Description
Technical Field
The invention relates to the technical field of road engineering materials, in particular to high-solid-content rapid demulsification modified emulsified asphalt and a preparation method thereof.
Background
The emulsified asphalt has the advantages of simple construction, no need of heating on site, energy conservation, environmental protection and the like, and shows the special superiority in the maintenance and the curing of asphalt pavement, so that a large number of countries in the world apply the emulsified asphalt on the pavement and the curing of highway engineering at present. The synchronous paving ultrathin wearing layer technology has wide application prospect in maintenance of bridge deck pavement, can give consideration to driving comfort and safety, and has the advantages of quick and convenient construction, quick traffic opening and obvious economic and social benefits. However, the synchronous construction method has higher requirements on interlayer bonding materials, and common emulsified asphalt or modified emulsified asphalt has the following defects that the requirements of synchronously paving an ultrathin wearing layer are difficult to meet.
(1) The traditional emulsified asphalt or modified emulsified asphalt for interlayer adhesion belongs to spraying type, has lower solid content, generally about 50 percent, and has smaller film forming thickness due to larger water content, and weak adhesion force of an adhesion layer, so that the technical requirement of synchronously paving an ultrathin wearing layer is difficult to achieve.
(2) Because of the low solid content, improper collocation of the emulsifier types and the like, the demulsification speed of common emulsified asphalt or modified emulsified asphalt is low, and the technical requirement of synchronous paving and rapid demulsification is difficult to meet.
(3) The higher the solid content, the greater the emulsion difficulty and the storage stability is difficult to ensure.
Therefore, the modified emulsified asphalt which meets the requirements is developed continuously according to the technical requirements of synchronous paving construction of the bridge deck ultrathin wearing layer, and the modified emulsified asphalt has important significance for improving the maintenance level of pavement maintenance.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the existing modified emulsified asphalt is difficult to meet the technical requirements of increasingly severe synchronous paving of ultrathin wearing layers in terms of solid content, demulsification speed and storage stability.
The invention is realized by the following technical scheme:
the high-solid-content rapid demulsification modified emulsified asphalt comprises emulsified asphalt and SBS latex, wherein the addition amount of the SBS latex is 5-10% of the mass of the emulsified asphalt, and the emulsified asphalt comprises the following components in percentage by mass:
58-65% of matrix asphalt, 0.3-0.6% of cationic compound emulsifier, 0.2-0.5% of stabilizer, defoamer, 1.0-1.5% of solubilizer accounting for the mass of the matrix asphalt and the balance of water, wherein the solubilizer is a mixture of sucrose fatty acid ester and gum arabic, and the cationic compound emulsifier comprises a middle-splitting emulsifier and at least one quick-splitting emulsifier.
Further, the quick-cracking emulsifier is one or two of alkylamine quick-cracking emulsifier and imidazoline quick-cracking emulsifier, and the middle-cracking emulsifier is quaternary ammonium salt emulsifier.
The SBS content in the SBS latex is 50-70%.
Further, the SBS content in the SBS latex is 60%.
The emulsion breaking speed is influenced by the fact that the content of the SBS latex is too high, the emulsion breaking speed is ensured while the solid content is considered to be improved, and the SBS latex with higher SBS content is selected for further improving the solid content while the solubilization is effectively performed through the solubilizer; the quick-cracking emulsifier is favorable for the quick demulsification of emulsified asphalt, but has adverse effect on the stability of the emulsified asphalt, and the action effect of the medium-cracking emulsifier is opposite to that of the emulsified asphalt.
The invention preferably provides high-solid-content rapid demulsification modified emulsified asphalt, wherein the alkylamine rapid-cracking emulsifier is octadecyl propylene diamine; the imidazoline quick-break emulsifier is 1-aminoethyl-2-heptadecyl imidazoline; the quaternary ammonium salt emulsifier is N- (3-octadecyl-amino-2-hydroxy) -propyl-trimethyl ammonium chloride, and the mass ratio of the quaternary ammonium salt emulsifier to the propyl-trimethyl ammonium chloride is 3:1.5:0.5.
The invention adopts three cationic emulsifiers for compounding, wherein two of alkylamine quick-cracking emulsifier and imidazoline quick-cracking emulsifier are quick-cracking emulsifier, and the first two emulsifiers are middle-cracking emulsifier, which is favorable for quick demulsification, but the demulsification is too quick and easy to cause unstable storage, so that the demulsification is relieved by adopting quaternary ammonium emulsifier, and the three emulsifiers are mutually matched; secondly, the invention adopts the mixture of sucrose fatty acid ester and gum arabic as a solubilizer, and both have certain surface activity, which shows certain similarity with an emulsifier. Wherein the former contains sucrose hydroxyl groups with strong hydrophilicity and fatty acid groups with lipophilicity, and the latter contains polysaccharide chains with affinity for water and polypeptide chains with affinity for oil. Thus, when both are added to the emulsion, the hydrophilic end can enter the aqueous solution during emulsification and the lipophilic end can be affinitive to the asphalt molecules, which will aid in the dispersion of the asphalt in the aqueous solution. Therefore, the sucrose fatty acid ester and the gum arabic can play a synergistic role with the emulsifier, and have positive effects on emulsification, dispersion uniformity and the like of asphalt, so that the emulsion can be quickly broken, and the solid content can be kept high.
The sucrose fatty acid ester and the Arabic gum can promote the viscosity of aqueous solution after being dissolved in water, thereby increasing the viscosity of the emulsified asphalt system. The organic stabilizer has the similar effect as the organic stabilizer, and can prevent the movement of asphalt oil drops to a certain extent, so that the polymerization or agglomeration of the tiny asphalt oil drops is slowed down, the separation degree of water and asphalt is reduced, and the stabilizing effect is realized.
According to analysis, after sucrose fatty acid ester and gum arabic are added, the screen residue of the emulsified asphalt is slightly low, which indicates that the agglomerated asphalt residues can be reduced; the evaporation residue content and the softening point are slightly increased and the penetration is slightly reduced, which means that the two can improve the comprehensive performance of the emulsified asphalt to a certain extent.
Finally, the invention adopts the pH value regulator, the stabilizer and the emulsifier together to ensure that the emulsion can be quickly demulsified and has good storage stability, and the SBS latex with the solid content of more than 55 percent is added, so that the solid content of the emulsified asphalt is greatly improved on the premise of ensuring the emulsification effect by reasonably selecting the formula substances.
The invention preferably provides high-solid-content rapid demulsification modified emulsified asphalt, wherein sucrose fatty acid ester and gum arabic are in powder form, and the mass ratio of the sucrose fatty acid ester to the gum arabic is 1:1.
The invention discloses high-solid-content rapid demulsification modified emulsified asphalt, which comprises an organic stabilizer, an inorganic stabilizer and gelatin, wherein the organic stabilizer is polyvinyl alcohol, the inorganic stabilizer is ferric chloride, and the mass ratio of the polyvinyl alcohol to the ferric chloride to the gelatin is 1:1:1.
the invention preferably provides high-solid-content rapid demulsification modified emulsified asphalt, and the matrix asphalt is asphalt meeting the construction technical specification of highway asphalt pavement.
Further, the defoamer is an organosilicon defoamer and a polyether defoamer, and the dosage of the defoamer is 0.1-0.2% of the mass of the emulsified asphalt.
The invention preferably relates to high-solid-content rapid demulsification modified emulsified asphalt, wherein the pH value regulator is concentrated hydrochloric acid, the mass concentration of substances is 10-12mol/L, and the pH value of the mixed solution is regulated to be 2-3.
The invention preferably provides high-solid-content rapid demulsification modified emulsified asphalt, which takes a mixture of sucrose fatty acid ester and gum arabic as a solubilizer, wherein the gum arabic is a natural industrial product, and has considerable green, environment-friendly and sustainable properties. On one hand, the two have certain surface activity, can reduce the surface tension of liquid and increase the dispersion uniformity degree of asphalt in emulsion, and on the other hand, the two can improve the viscosity degree of emulsion to a certain extent, thereby improving the system stability of emulsified asphalt. In addition, the addition of sucrose fatty acid ester and gum arabic has a positive effect on the uniform mixing distribution of SBS and asphalt after demulsification.
A preparation method of high-solid-content rapid demulsification modified emulsified asphalt is used for preparing the high-solid-content rapid demulsification modified emulsified asphalt and comprises the following steps:
step 1: preparing a cationic compound emulsifier;
step 2: dissolving a cationic compound emulsifier, a stabilizer and a solubilizer by adopting hot water, uniformly mixing, and regulating pH to be acidic by adopting a pH value regulator to obtain an emulsion;
step 3: heating matrix asphalt to a flowing state, preheating a colloid mill by adopting hot water with the temperature equivalent to that of the emulsion, pouring the emulsion into the preheated colloid mill, adding the matrix asphalt while stirring, continuously grinding after adding, and adding a defoaming agent to obtain the emulsified asphalt.
Step 4: and (3) adding SBS latex into the emulsified asphalt obtained in the step (3), and stirring to obtain the high-solid-content rapid demulsification modified emulsified asphalt.
The invention discloses a preparation method of high-solid-content rapid demulsification modified emulsified asphalt, which is characterized in that in the step 2, the stabilizer comprises an organic stabilizer, an inorganic stabilizer and gelatin, and the specific steps of the step 2 are as follows: heating the metered water to 85-95 ℃, dissolving the organic stabilizer in hot water, uniformly stirring, and slightly standing after the aqueous solution is changed from turbid to almost transparent; when the temperature of the aqueous solution is reduced to 55-65 ℃, adding an inorganic stabilizer and gelatin; after dissolution, placing the mixture on a stirrer set at 55-65 ℃ and adding a cationic compound emulsifier, and stirring until the mixture is completely dissolved to obtain a mixed solution; adding powdered sucrose fatty acid ester and gum arabic, and continuing stirring until a stable aqueous solution system is formed; finally, the pH value of the mixed solution is regulated to be 2-3 by a pH value regulator.
The invention discloses a preparation method of high-solid-content rapid demulsification modified emulsified asphalt, which is characterized in that in the step 3, matrix asphalt is heated to 130-150 ℃ to be in a flowing state, then a colloid mill is circularly preheated to about 60-70 ℃, hot water is discharged after preheating, then an equal-concentration hot emulsion is used for wetting, residual water is replaced to ensure the concentration of the emulsion, then the emulsion is poured into the preheated colloid mill, the matrix asphalt is added while stirring, grinding is kept for 80-100 seconds after the addition, a defoaming agent is added, and the temperature of the emulsified asphalt obtained after the preparation is finished is 70-80 ℃.
The invention discloses a preparation method of high-solid-content rapid demulsification modified emulsified asphalt, which comprises the following specific steps of: and (3) adding SBS latex into the emulsified asphalt obtained in the step (3), and stirring for 10-30min at the rotating speed of 300-800r/min by using an electric stirrer to ensure that the emulsified asphalt is fully and uniformly mixed, thus obtaining the high-solid-content rapid demulsification modified emulsified asphalt.
The SBS latex is white emulsion SBS, and compared with a solid SBS modifier, the SBS latex has the advantages of equal modifier consumption, better product, convenient operation and no need of overgrinding.
The invention discloses a preparation method of high-solid-content rapid demulsification modified emulsified asphalt, which comprises the following steps of:
and step 1, molding a cement concrete cube test block, wherein the size of the test block is 100mm, curing is carried out for 7 days, and demoulding is carried out to obtain the target cement test block.
And 2, heating the cement concrete blocks by an electrothermal blowing dryer, wherein the heat preservation temperature is 30-90 ℃, and taking out after heating and heat preservation for 20-30 min.
And step 3, uniformly and rapidly coating 10+/-2 mL of high-solid-content rapid demulsification modified emulsified asphalt on the surface of the cement concrete block by using a brush.
And 4, starting demulsification when the surface starts to turn from gray to black, wherein all the surfaces turn to black, and the time taken in the middle of timing by using a stopwatch is the demulsification time.
And 5, sequentially smearing and timing 6 faces of the cube according to the steps, carrying out 6 groups of parallel experiments, and averaging results to obtain demulsification time.
The method for measuring the demulsification time of the emulsified asphalt, which is developed by the invention, overcomes the defect that the existing demulsification detection completely depends on manual judgment, realizes the quantitative measurement of the demulsification time of the emulsified asphalt, averages the measurement of 6 surfaces by manufacturing a cube sample, and ensures the accuracy of the whole test.
The invention has the following advantages and beneficial effects:
1. according to the invention, the solid content of emulsified asphalt is greatly improved under the premise of ensuring the emulsification effect by the synergistic effect of the compounded emulsifying agent, the solubilizer, the pH value regulator and the stabilizing agent, so that the solid content is more than 62%, the maximum can reach 63.3%, and the emulsion can be rapidly broken, and the film forming thickness is ensured.
2. The prepared cation compound emulsifier has better compatibility with matrix asphalt, better emulsification effect, and can form oil-in-water emulsion, and can keep stable emulsification under the condition of high solid content.
3. The prepared emulsified asphalt has good compatibility with SBS latex, and the blending proportion is wide, so that the high-low temperature performance of the evaporation residue of the modified emulsified asphalt is ensured.
4. The invention develops a method for measuring the demulsification time of emulsified asphalt, which realizes the accurate measurement of the demulsification time of the emulsified asphalt, overcomes the defect that the prior method completely relies on manual qualitative judgment, and ensures that the test result is more accurate.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention.
FIG. 1 is a state diagram of a high solids fast demulsification modified emulsified asphalt in the demulsification time detection process of the present invention.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1
Step 1: heating the measured tap water to 90 ℃, dissolving 1g of organic stabilizer polyvinyl alcohol in hot water, uniformly stirring, standing for 10min after the aqueous solution is changed from turbid to almost transparent, and adding 1g of inorganic stabilizer ferric chloride and 1g of gelatin after the temperature of the aqueous solution is reduced to 60 ℃; after dissolution, it was placed on a magnetic stirrer set at 60 ℃ and 5g of a built-up emulsifier was added, in which octadecyl propylene diamine: 1-aminoethyl-2-heptadecylimidazoline: 18331 the mass ratio of 3:1.5:0.5, stirring thoroughly until completely dissolved, adding 3.1g sucrose fatty acid ester and 3.1g gum arabic, stirring until a stable and uniform aqueous solution system is formed, wherein the condition that floating matters and agglomerations are avoided; finally, 3g of hydrochloric acid is used for adjusting the pH value of the mixed solution to 3, so as to obtain an emulsion, wherein 18331 is N- (3-octadecylamine-2-hydroxy) -propyl-trimethyl ammonium chloride.
Step 2, 630g of GS90 # Heating matrix asphalt to 140 deg.C to make it be in fluid stateAnd circularly preheating the colloid mill to 65 ℃ by hot water, discharging the hot water after the preheating is finished, and soaking the water in the colloid mill by adopting a hot emulsion.
And 3, pouring the emulsion into a preheated colloid mill, adding matrix asphalt while stirring, grinding for 90s after adding, spraying 1.5g of defoamer, and if the temperature of the newly prepared emulsified asphalt after finishing preparation is 70-80 ℃, the internal and surface temperature of the emulsion are different regardless of the placing speed, and the surface moisture is seriously scattered and skinned, so that the emulsified asphalt is required to be stirred, covered and the moisture evaporation speed is reduced as much as possible. After 30min of standing, the temperature of the emulsified asphalt is reduced to room temperature, and the emulsified asphalt is poured into a sealed container to be stored in a shade place, wherein the total mass of the emulsified asphalt is 1000g.
And 4, adding 40g of SBS latex into the emulsified asphalt obtained in the step 3, wherein the solid content of SBS is 60%, and stirring for 15min by using an electric stirrer at a rotating speed of 500r/min after the SBS latex is completely mixed uniformly, so that the modified emulsified asphalt with high solid content can be obtained.
Table 1 shows the properties of the high solids quick demulsification modified emulsified asphalt of example 1
Example 2
Step 1, heating the measured tap water to 90 ℃, firstly dissolving 1g of organic stabilizer polyvinyl alcohol in hot water, uniformly stirring, standing for 10min after the aqueous solution is changed from turbid to almost transparent, then adding 1g of ferric chloride and 1g of gelatin after the temperature of the aqueous solution is reduced to 60 ℃, and after the solution is dissolved, placing the mixture on a magnetic stirrer set at 60 ℃ and adding 5g of compound emulsifier, wherein the compound emulsifier is octadecyl propylene diamine: 1-aminoethyl-2-heptadecylimidazoline: 18331 is compounded according to the mass ratio of 3:1.5:0.5, and is fully stirred until dissolved; adding 3.1g sucrose fatty acid ester and 3.1g gum arabic, stirring until a stable and uniform aqueous solution system is formed, and regulating the pH value of the mixed solution to 3 with 3g hydrochloric acid to obtain emulsion.
Step 2, 630g of GS90 # Heating matrix asphalt to 140 ℃ to enable the matrix asphalt to be in a flowing state, circularly preheating a colloid mill to about 65 ℃ by hot water, and discharging the hot water after preheating.
And 3, pouring the emulsion into a preheated colloid mill, adding matrix asphalt while stirring, keeping grinding for 90s after adding, spraying 1.5g of defoamer, and if the temperature of the newly prepared emulsified asphalt after finishing preparation is 70-80 ℃, the internal and surface temperature of the emulsion are different regardless of the placing speed, and the surface moisture is seriously scattered and skinned, so that the emulsified asphalt is required to be stirred, covered and the moisture evaporation speed is reduced as much as possible. After 30min of standing, the temperature of the emulsified asphalt is reduced to room temperature, and the emulsified asphalt is poured into a sealed container to be stored in a shade place, wherein the total mass of the emulsified asphalt is 1000g.
And 4, adding 60g of SBS latex into the emulsified asphalt obtained in the step 3, wherein the solid content of the SBS latex is 60%, and stirring for 15min by using an electric stirrer at a rotating speed of 500r/min after the completion of the step, so that the emulsified asphalt is fully and uniformly mixed, and the modified emulsified asphalt with high solid content can be obtained.
Table 2 shows the properties of the high solids quick demulsification modified emulsified asphalt of example 2
Example 3
Step 1, heating the measured tap water to 90 ℃, dissolving 1g of polyvinyl alcohol in hot water, uniformly stirring, standing for 10min after the aqueous solution is changed from turbid to almost transparent, and adding 1g of ferric chloride and 1g of gelatin when the temperature of the aqueous solution is reduced to 60 ℃; after dissolution, it was placed on a magnetic stirrer set at 60 ℃ and 5g of emulsifier was added, the compound emulsifier being octadecyl propylene diamine: 1-aminoethyl-2-heptadecylimidazoline: 18331 is compounded according to the mass ratio of 3:1.5:0.5, and is fully stirred until dissolved; continuing to add 3.1g of sucrose fatty acid ester and 3.1g of gum arabic, and stirring until a stable and uniform aqueous solution system is formed; finally, 3g of hydrochloric acid is used for regulating the pH value of the mixed solution to 3 to obtain emulsion, wherein the condition that floating objects and agglomerations are avoided.
Step 2, 630g of GS90 # Heating matrix asphalt to 140 ℃ to enable the matrix asphalt to be in a flowing state, circularly preheating a colloid mill to 65 ℃ by hot water, and discharging the hot water after preheating.
And 3, pouring the emulsion into a preheated colloid mill, adding matrix asphalt while stirring, keeping grinding for 90s after adding, spraying 1.5g of defoamer, wherein the temperature of the newly prepared emulsified asphalt after finishing preparation is generally 70-80 ℃, if the temperature of the emulsion is different from the surface temperature reduction speed, the surface water loss is serious and the emulsified asphalt is skinned, stirring the emulsified asphalt, covering the emulsified asphalt, and reducing the water evaporation speed as much as possible. After 30min of standing, the temperature of the emulsified asphalt is reduced to room temperature, and the emulsified asphalt is poured into a sealed container to be stored in a shade place, wherein the total mass of the emulsified asphalt is 1000g.
And 4, adding 80g of SBS latex into the emulsified asphalt obtained in the step 3, wherein the solid content of the SBS latex is 60%, and stirring for about 15min by using an electric stirrer at a rotating speed of 500r/min after the completion of the step, so that the emulsified asphalt is fully and uniformly mixed, and the modified emulsified asphalt with high solid content can be obtained.
Table 3 shows the properties of the high solids quick demulsification modified emulsified asphalt of example 3
As can be seen from comparison of the detection results of examples 1, 2 and 3, under the condition that the SBS addition amount is too small, as in 4% of example 1, the low-temperature performance cannot be guaranteed, the ductility at 5 ℃ cannot meet the requirement, the solid content of the modified emulsified asphalt is slightly reduced as the SBS latex addition amount is increased to 6% and 8%, but the high-low-temperature performance is obviously improved, the demulsification time is slightly prolonged as the SBS latex addition amount is gradually increased, but the demulsification time still meets the current quick-crack requirement, and other performances also meet the technical requirement of synchronously paving the ultra-thin wearing layer.
Example 4
This example differs from example 3 in that the emulsifier is octadecyl propylene diamine, a fast-breaking emulsifier.
Example 5
This example differs from example 3 in that the emulsifier is a combination of two fast-cracking emulsifiers, octadecyl propylene diamine and 1-aminoethyl-2-heptadecyl imidazoline.
Example 6
This example differs from example 3 in that the emulsifier is all the medium split emulsifier N- (3-octadecyl-2-hydroxy) -propyl-trimethylammonium chloride.
Example 7
This example differs from example 3 in that the emulsifier is a fast cracking emulsifier and a mid-cracking emulsifier and the mass ratio is 4.5:0.5.
The demulsification time and 1d stability test results for examples 3-7 are shown in Table 4 below.
TABLE 4 demulsification time and 1d stability test results for example 3-example 7
Note that: a-octadecyl propylene diamine, B-1-aminoethyl-2-heptadecyl imidazoline, C-N- (3-octadecyl-amino-2-hydroxy) -propyl-trimethyl ammonium chloride.
According to the invention, through the blending of multiple emulsifying agents, when all quick-cracking emulsifying agents are adopted, the storage stability is poor, and when all medium-cracking emulsifying agents are adopted, the demulsification speed is low, so that the comprehensive consideration of the demulsification time and the stability is realized, the combination of a large amount of quick-cracking emulsifying agents and a small amount of medium-cracking emulsifying agents is adopted, and the combination of 2 quick-cracking emulsifying agents and 1 medium-cracking emulsifying agents is adopted to obtain the modified emulsified asphalt with excellent demulsification time and stability.
Example 8-example 10
Example 8 differs from example 3 in that no solubilizing agent was added, example 9 differs from example 3 in that sucrose fatty acid ester was added alone, example 10 differs from example 3 in that gum arabic was added alone, and the properties obtained are shown in table 5.
Table 5 shows the properties of the high solids quick demulsification modified emulsified asphalt of examples 8-10
As can be seen from the comparison of the above examples 3 with examples 8-10, the addition of sucrose fatty acid ester and gum arabic resulted in a slightly lower on-screen residual of the emulsified asphalt, indicating that agglomerated asphalt residues can be reduced; the evaporation residue content and softening point are slightly increased, penetration is slightly reduced, and storage stability is higher, which means that the two can improve the comprehensive performance of the emulsified asphalt to a certain extent.
The method for detecting the demulsification time in the above embodiment is as follows:
and step 1, molding a cement concrete cube test block, wherein the size of the test block is 100mm, curing is carried out for 7 days, and demoulding is carried out to obtain the target cement test block.
And 2, heating the cement concrete blocks by adopting an electrothermal blowing dryer, wherein the heat preservation temperature is 30-90 ℃, heating and preserving heat for 20-30min, and taking out.
And step 3, uniformly and rapidly coating 10+/-2 mL of high-solid-content rapid demulsification modified emulsified asphalt on the surface of the cement concrete block by using a brush.
And 4, starting demulsification when the surface starts to turn from gray to black, wherein all the surfaces turn to black, and the time taken in the middle of timing by using a stopwatch is the demulsification time.
And 5, sequentially smearing and timing 6 faces of the cube according to the steps, carrying out 6 groups of parallel experiments, and taking an average value of the results.
A picture of the demulsification time test of the high-solid-content rapid demulsification modified emulsified asphalt is shown in fig. 1.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The high-solid-content rapid demulsification modified emulsified asphalt is characterized by comprising emulsified asphalt and SBS latex, wherein the addition amount of the SBS latex is 5-10% of the mass of the emulsified asphalt, and the emulsified asphalt comprises the following components in percentage by mass:
58-65% of matrix asphalt, 0.3-0.6% of cationic compound emulsifier, 0.2-0.5% of stabilizer, 0.1-0.2% of defoamer, 1.0-1.5% of solubilizer accounting for the mass of the matrix asphalt, and the balance of water, wherein the solubilizer is a mixture of sucrose fatty acid ester and gum arabic, and the mass ratio of the sucrose fatty acid ester to the gum arabic is 1:1;
the cationic compound emulsifier comprises a medium-cracking emulsifier and at least one fast-cracking emulsifier;
dissolving cation compound emulsifier, stabilizer and solubilizer, mixing uniformly, and regulating pH to 2-3 with pH regulator.
2. The high-solid-content rapid demulsification modified emulsified asphalt as set forth in claim 1, wherein the rapid cracking emulsifier is one or a mixture of two of alkylamine rapid cracking emulsifier and imidazoline rapid cracking emulsifier, and the medium cracking emulsifier is quaternary ammonium salt emulsifier.
3. The high solids rapid demulsification modified asphalt as claimed in claim 2, wherein the alkylamine rapid-onset emulsifier is octadecyl propylene diamine; the imidazoline quick-break emulsifier is 1-aminoethyl-2-heptadecyl imidazoline; the quaternary ammonium salt emulsifier is N- (3-octadecyl-amino-2-hydroxy) -propyl-trimethyl ammonium chloride, and the mass ratio of the quaternary ammonium salt emulsifier to the propyl-trimethyl ammonium chloride is 3:1.5:0.5.
4. A high solids rapid demulsifying modified emulsified asphalt as claimed in any one of claims 1-3, wherein the SBS content of the SBS latex is 50-70%.
5. A method for preparing the high-solid-content rapid demulsification modified emulsified asphalt, which is characterized by comprising the following steps of:
step 1: preparing a cationic compound emulsifier;
step 2: dissolving a cationic compound emulsifier, a stabilizer and a solubilizer by adopting hot water, uniformly mixing, and regulating pH to be acidic by adopting a pH value regulator to obtain an emulsion;
step 3: heating matrix asphalt to a flowing state, preheating a colloid mill by adopting hot water with the temperature equivalent to that of the emulsion, pouring the prepared emulsion into the preheated colloid mill, adding the matrix asphalt while stirring, continuously grinding after adding, and adding a defoaming agent to obtain emulsified asphalt;
step 4: and (3) adding SBS latex into the emulsified asphalt obtained in the step (3), and stirring to obtain the high-solid-content rapid demulsification modified emulsified asphalt.
6. The method for preparing the high-solid-content rapid demulsification modified emulsified asphalt according to claim 5, wherein in the step 2, the stabilizer comprises an organic stabilizer, an inorganic stabilizer and gelatin, and the specific steps of the step 2 are as follows: heating the metered water to 85-95 ℃, dissolving the organic stabilizer in hot water, uniformly stirring, and standing after the aqueous solution is changed from turbid to almost transparent; when the temperature of the aqueous solution is reduced to 55-65 ℃, adding an inorganic stabilizer and gelatin; after dissolution, placing the mixture on a stirrer set at 55-65 ℃ and adding a cationic compound emulsifier, and stirring until the mixture is completely dissolved; adding sucrose fatty acid ester and gum arabic, and continuing stirring until a stable aqueous solution system is formed; finally, the pH value of the mixed solution is regulated to be 2-3 by a pH value regulator.
7. The method for preparing the high-solid-content rapid demulsification modified emulsified asphalt as set forth in claim 5 or 6, wherein in the step 3, the matrix asphalt is heated to 130-150 ℃ to be in a flowing state, then the colloid mill is circularly preheated to 60-70 ℃ by hot water, the hot water is discharged after the preheating is finished, the hot water is wetted by using a thermal emulsion with equal concentration, the residual water is replaced to ensure the concentration of the emulsion, then the emulsion is poured into the preheated colloid mill, the matrix asphalt is added while stirring, grinding is maintained for 80-100 seconds after the adding, the antifoaming agent is added, and the temperature of the emulsified asphalt obtained after the preparation is 70-80 ℃.
8. The method for preparing the high-solid-content rapid demulsification modified emulsified asphalt according to claim 5 or 6, wherein the specific steps of the step 4 are as follows: and (3) adding SBS latex into the emulsified asphalt obtained in the step (3), and stirring for 10-30min at the rotating speed of 300-800r/min by using an electric stirrer to ensure that the emulsified asphalt is fully and uniformly mixed, thus obtaining the high-solid-content rapid demulsification modified emulsified asphalt.
9. The method for preparing the high-solid-content rapid demulsification modified emulsified asphalt according to claim 5 or 6, further comprising the following method for detecting the demulsification time of the high-solid-content rapid demulsification modified emulsified asphalt:
step 1, molding a cement concrete cube test block, curing, and demolding to obtain a target cement test block;
step 2, heating the cement concrete block obtained in the step 1, wherein the heat preservation temperature is 30-90 ℃, heating and preserving heat for 20-30min, and then taking out;
step 3, uniformly and rapidly coating 10+/-2 mL of high-solid-content rapid demulsification modified emulsified asphalt on the surface of the cement concrete block by using a brush;
step 4, the surface is started to be changed from gray to black, the whole surface is changed to black, the demulsification is completed, and the time used in the middle of timing by using a stopwatch is the demulsification time;
and 5, sequentially smearing and timing 6 faces of the cube according to the steps 1-4, performing 6 groups of parallel experiments, and averaging the results to obtain demulsification time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310277964.XA CN115975390B (en) | 2023-03-21 | 2023-03-21 | High-solid-content rapid demulsification modified emulsified asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310277964.XA CN115975390B (en) | 2023-03-21 | 2023-03-21 | High-solid-content rapid demulsification modified emulsified asphalt and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115975390A CN115975390A (en) | 2023-04-18 |
| CN115975390B true CN115975390B (en) | 2023-06-20 |
Family
ID=85976530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310277964.XA Active CN115975390B (en) | 2023-03-21 | 2023-03-21 | High-solid-content rapid demulsification modified emulsified asphalt and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115975390B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508848A (en) * | 2009-03-18 | 2009-08-19 | 广州路翔股份有限公司 | Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt |
| CN104559261A (en) * | 2015-01-08 | 2015-04-29 | 吴江华威特种油有限公司 | Modified and emulsified asphalt composition |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5128924B2 (en) * | 1973-10-04 | 1976-08-23 | ||
| NO912458L (en) * | 1989-10-26 | 1991-08-23 | Elf France | EMULSION OF BITUMINOEST BINDING AGENT. |
| JP3957389B2 (en) * | 1998-02-13 | 2007-08-15 | 昭和シェル石油株式会社 | Asphalt emulsion |
| CN106810882B (en) * | 2015-12-02 | 2019-06-04 | 中国石油化工股份有限公司 | A kind of emulsified asphalt and preparation method thereof |
| CN106496595A (en) * | 2016-10-13 | 2017-03-15 | 常州市鼎升环保科技有限公司 | A kind of preparation method of composite asphalt emulsifying agent |
| CN111793369B (en) * | 2020-08-03 | 2023-01-31 | 山东京博石油化工有限公司 | Spraying SBS modified emulsified asphalt and preparation method thereof |
| CN114163828B (en) * | 2020-09-11 | 2023-07-28 | 中国石油化工股份有限公司 | Matrix asphalt for waterproof coiled material and preparation method thereof |
-
2023
- 2023-03-21 CN CN202310277964.XA patent/CN115975390B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508848A (en) * | 2009-03-18 | 2009-08-19 | 广州路翔股份有限公司 | Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt |
| CN104559261A (en) * | 2015-01-08 | 2015-04-29 | 吴江华威特种油有限公司 | Modified and emulsified asphalt composition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115975390A (en) | 2023-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101643584B (en) | Modified emulsified asphalt with excellent temperature adaptability and preparation method thereof | |
| CN101602862B (en) | Warm-mixed asphalt additive and preparation method thereof | |
| CN102675890B (en) | Demulsifying slow breaking and quick setting modified emulsified asphalt by microwave heating and preparation method thereof | |
| CN109824318A (en) | A kind of cold mixing cold-application anionic emulsified bitumen and preparation method thereof, application | |
| CN109929258B (en) | SBR modified emulsified asphalt and preparation method thereof | |
| CN109575617A (en) | A kind of emulsified asphalt and preparation method thereof | |
| US5352285A (en) | Microsurfacing system | |
| CN108727842A (en) | A kind of emulsified asphalt and preparation method, stability and durability type cement pavement slurry seal Sub-sealing Course and preparation method thereof | |
| CN101619149A (en) | Method for preparing cation emulsified rubber asphalt | |
| CN110358316A (en) | A kind of preparation method of single-component aqueous epoxy modified emulsifying asphalt | |
| CN102492365B (en) | Preparation method of liquid rubber asphalt water-proof paint | |
| CN115975390B (en) | High-solid-content rapid demulsification modified emulsified asphalt and preparation method thereof | |
| Zhu et al. | Study on slow-release mechanism of salt-storage anti-icing fog seal | |
| CN109868064A (en) | A kind of aqueous large arch dam, strong-hydrophobicity pitch base waterproof coating of low viscosity and preparation method thereof | |
| CN106009739A (en) | Modified emulsified asphalt for ultrathin wearing layers and preparation method thereof | |
| CN108610529A (en) | A kind of water-soluble graphene modified color emulsified asphalt and preparation method thereof | |
| CN108587563A (en) | A kind of bituminous cement and its preparation method and application | |
| CN110885634B (en) | Asphalt-based material and preparation method thereof | |
| CN113860800B (en) | Pressure-sensitive early-strength microcapsule cold-mix asphalt mixture and preparation method thereof | |
| CN109593375B (en) | Combined liquid fast-cracking cationic emulsifier for SBS modified asphalt emulsification and application | |
| Zhang et al. | An asphalt emulsion modified by compound of epoxy resin and styrene-butadiene rubber emulsion | |
| CN110591399A (en) | Modified emulsified asphalt with high viscosity and high softening point and preparation method thereof | |
| CN110330801A (en) | The preparation method of epoxy resin modified emulsified asphalt | |
| CN104387781A (en) | Fluid rubber modified emulsified asphalt and preparation method thereof | |
| CN113801512A (en) | Penetrant and application thereof, road asphalt high-permeability penetrating layer oil and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |