CN103102699B - Inorganic layered compound modified emulsified bitumen and preparation method thereof - Google Patents
Inorganic layered compound modified emulsified bitumen and preparation method thereof Download PDFInfo
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- CN103102699B CN103102699B CN201110352375.0A CN201110352375A CN103102699B CN 103102699 B CN103102699 B CN 103102699B CN 201110352375 A CN201110352375 A CN 201110352375A CN 103102699 B CN103102699 B CN 103102699B
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- houghite
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Abstract
The invention discloses an inorganic layered compound modified emulsified bitumen and a preparation method thereof. The modified emulsified bitumen comprises, by mass, 20 to 80 parts of base asphalt and 20 to 80 parts of an exfoliation-state hydrotalcite colloidal solution, wherein the exfoliation-state hydrotalcite colloidal solution is prepared by mixing and stirring lactate intercalated hydrotalcite and a proper amount of water. The preparation method comprises the following steps: dissolving an emulsifier in the exfoliation-state hydrotalcite colloidal solution to prepare a mixed solution; adjusting the pH value of the mixed solution to be 5 to 6; and simultaneously adding the mixed solution and base asphalt into a colloid mill for rapid mixing so as to obtain the inorganic layered compound modified emulsified bitumen. The inorganic layered compound modified emulsified bitumen provided by the invention has the advantages of excellent wear resistance, strength and ageing resistance, a green and environment-friendly additive, low cost and simple preparation and has wide application prospects in constructional engineering like paving and maintenance of a road, waterproofness of a building and seepage-proofness of hydraulic engineering.
Description
Technical field
The present invention relates to a kind of modified emulsifying asphalt and preparation method thereof, specifically a kind of for urban road laying, maintenance, the inorganic layered compounds modified emulsifying asphalt composition and method of making the same of building waterproofing industry.
Background technology
Highway communication is the main composition part of traffic, high-grade highway particularly motorway is the main trunk highway of various countries, its volume of traffic is large, heavy goods vehicles is more, vehicle loading time interval is short, because road speed is fast, vehicle-mounted impulses power of satisfying the need is large, vehicle braking path length etc. under casual condition.Under the effect of traffic load, there is rut and hole groove phenomenon in road surface, under the effect of light, heat and water etc., causes the adhesivity at pitch and mineral aggregate interface to reduce prematurely, cause road surface to occur peeling off, loose, cheat the destructions such as hole.Make the maintenance cycle time of highway like this, thus considerably increase the expense of maintenance and maintenance.Particularly for the petroleum pitch that wax content is relatively high, its ductility is little, and not strong with mineral aggregate bonding force, high to temperature sensitivity, the performance need in resistance to deterioration improves further.Meanwhile, under the impact of worldwide power supply anxiety, in road construction work, require to save the energy, economize on resources, the cry of protection of the environment, decreasing pollution is also more and more higher.The modifying asphalt finding a kind of excellent abrasive resistance, intensity and resistance to deterioration just becomes a current major issue urgently to be resolved hurrily, especially in the maintenance process of built highway.In addition, along with expanding economy, to also constantly increasing of architectural waterproof material demand, improving constantly of the waterproof requirement of buildings, and the price of water-proof material is general higher in the market, also need that cost of development is low, the waterproof material of good water-proof effect is put on market.
Emulsified bitumen is a kind of conventional bituminous material, and compared with heated bitumen, emulsified bitumen has advantages such as saving the energy, easy to use, environmental protection.A kind of organic bentonite composition modified emulsified asphalt is described in CN200510103505.1, production efficiency is high, produce easy to control, easy to operate, low cost and other advantages, but needs to improve for the wear resistance of emulsified bitumen and the performance of resistance to deterioration aspect.A kind of inorganic nano-particle and polymer composite modified emulsification asphalt is described in CN200610032241.X, inorganic nano-particle is nano silicon oxide, titanium oxide, zinc oxide, aluminum oxide etc., although have certain modified effect, the cost of the most of additive used is higher.A kind of inorganic powder and nano material composite modified emulsified bitumen crack repairing material pitch is described in CN200710035073.4, there is the over-all propertieies such as excellent wear resistance, intensity, excellent waterproof effect and good infiltration, but simple inorganic nano-particle mixes with emulsified bitumen, poor compatibility will certainly be produced, dispersed bad problem.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of inorganic layered compounds modified emulsifying asphalt and preparation method thereof, the hydrotalcite-modified emulsified bitumen of the present invention has excellent wear resistance, intensity and resistance to deterioration, good dispersion effect, additive environmental protection, cost is low, prepares easy.
Inorganic layered compounds modified emulsifying asphalt of the present invention, comprises by mass parts:
(1) basic asphalt: 20 ~ 80 parts, is preferably 35 ~ 50 parts
(2) peel off state houghite colloidal solution: 20 ~ 80 parts, be preferably 35 ~ 50 parts
(3) emulsifying agent: 0.04 ~ 1.6 part
Wherein basic asphalt determines required character according to the occasion of application, can be common heavy-duty road petroleum pitch, as: No. 70, AH-70(Esso, below analogize), AH-90, AH-110 also can be polymer modified asphalt, as: SBS modifying asphalt, SBR modifying asphalt, or the other types such as shoddy, latex modifying asphalt, 25 DEG C of penetration degrees of above-mentioned basic asphalt are 50-160, in 0.1mm.
The solid masses content wherein peeling off state houghite colloidal solution is 0.05 % ~ 2%, is to be obtained in heated and stirred method by lactate intercalated houghite and water.
In modified emulsifying asphalt of the present invention, the hydrotalcite for peeling off is lactate intercalated houghite, is preferably magnalium lactate hydrotalcite, as being specially molecular formula for [Mg
1-xal
x(OH)
2] (C
3h
5o
3)
y(CO
3)
zmH
2o, x=0.2 ~ 0.33, y=0.068 ~ 0.33, z=0 ~ 0.066,0.1≤m≤0.8, x=y+z+z.Wherein C
3h
5o
3represent lactate, CO
3represent carbonate, the existence of carbonate, to be generally in lactate intercalated houghite preparation process CO in air
2impact.
In modified emulsifying asphalt of the present invention, the source of peeling off state lactate intercalated houghite is (Hibino T, Kobayashi M. Delamination of layered double hydroxides in water [J]. J. Mater. Chem., 2005,15:653-656).
In the present invention, emulsifying agent can for conventional cationic emulsifier, amphoteric emulsifier and nonionic emulsifying agent, as: one or more in quaternary ammonium salt, tetrahydroglyoxaline, aminated lignin, amino acid sodium and alkyl Pluronic F-127 ether etc.
The preparation method of inorganic layered compounds modified emulsifying asphalt of the present invention is as follows:
(1) lactate intercalated houghite, water are added reactor, heated and stirred reaction 0.5 ~ 24h, obtains peeling off state houghite colloidal solution;
(2) emulsifying agent is dissolved in peels off in state houghite colloidal solution, be heated to 55 ~ 65 DEG C, be prepared into mixing solutions, adjust ph 5 ~ 6, and basic asphalt joins colloidal mill simultaneously and mixes rapidly, can obtain inorganic layered compounds modified emulsifying asphalt.
The solid masses content wherein peeling off state houghite colloidal solution is 0.05 % ~ 2%, is to be obtained in heated and stirred method by lactate intercalated houghite and water.Heating temperature can be 25 ~ 200 DEG C, and be preferably 90 ~ 150 DEG C, heat-up time is 0.5 ~ 24h.
Wherein the non-pressure vessel or autoclave that the reactor of state houghite colloidal solution is band stirring is peeled off in preparation.
The present invention is directed to the deficiencies in the prior art, a kind of hydrotalcite-modified emulsified bitumen composition and method of making the same is provided, the additive that this modified emulsifying asphalt is selected is for peeling off state lactate intercalated houghite, utilize the surface effects of its nano material uniqueness, small-size effect, the special property of macro quanta tunnel effect and hydrotalcite stratified material, makes hydrotalcite-modified emulsified bitumen have excellent wear resistance, intensity and resistance to deterioration, additive cost is low, and preparation is simple.The construction works such as urban road laying and maintenance, buildings waterproof, hydraulic anti-seepage there is good use properties.
Peel off state hydrotalcite and the emulsified bitumen mechanism of action: due to the laminate structure of hydrotalcite, make hydrotalcite when interacting with pitch, interlayer surface is difficult to contact with asphaltene molecule, and most surfaces is wasted.And peel off the hydrotalcite of state, owing to there is strong covalent linkage effect in the laminate of lamellar compound, interlayer is then a kind of weak interaction force (being generally Van der Waals force), therefore layer and layer are easily strutted by other molecule or peel off, and veneer structure is unaffected, this makes it possible to the interlayer surface making full use of hydrotalcite, make hydrotalcite and asphaltene molecule compound under less yardstick, eliminate steric effect, the impact of diffusional resistance, strengthen the interaction between hydrotalcite laminate and asphaltene molecule, more effective raising is to the associativity of asphalt aggregate, pitch bonding strength can be increased.Peeling off hydrotalcite laminate is dispersed in emulsified bitumen, is equivalent to numerous small aggregate particulate, is combined tightly by bituminous material, can resist its fragility of low temperature and low-temperature performance.Peel off the adding of hydrotalcite, add the force of cohesion of bituminous material, improve viscosity, make not yielding, the softening and flowing of bituminous material under high temperature, be thus conducive to the raising of its high-temperature behavior.
Embodiment
Below by embodiment, the present invention is further described, but therefore do not limit the present invention, and percentage composition is wherein mass percentage, and number is parts by weight.
Embodiment 1
Step 1: lactate Intercalated, appropriate amount of deionized water are added reactor, 100 DEG C of backflows, Keep agitation reaction 2h, obtained transparent stripping state houghite colloidal solution, the solid content of hydrotalcite is 0.8%.
Step 2: 0.6 part of octadecyl trimethyl ammonium chloride is joined 45 parts and peel off state houghite colloidal solution, finally mixing solutions is heated to 55 ~ 60 DEG C, adjust ph to 5 ~ 6,55 parts of AH-90 are heated to 100 ~ 120 DEG C, join in colloidal mill simultaneously, short mix is even, and obtaining solid content is 55% hydrotalcite-modified emulsified bitumen.
Embodiment 2
Preparation peels off state houghite colloidal solution method with step 1 in embodiment 1, and wherein the solid content of hydrotalcite is 1.2%.
0.6 part of octadecyl trimethyl ammonium chloride is joined 40 parts and peel off state houghite colloidal solution, finally mixing solutions is heated to 55 ~ 60 DEG C, adjust ph to 5 ~ 6,60 parts of AH-90 are heated to 100 ~ 120 DEG C, join in colloidal mill simultaneously, short mix is even, and obtaining solid content is 60% hydrotalcite-modified emulsified bitumen.
Embodiment 3
Preparation peels off state houghite colloidal solution method with step 1 in embodiment 1, and wherein the solid content of hydrotalcite is 1.6%.
0.6 part of octadecyl trimethyl ammonium chloride is joined 45 parts and peel off state houghite colloidal solution, finally mixing solutions is heated to 55 ~ 60 DEG C, adjust ph to 5 ~ 6,55 parts of SBS modifying asphalts are heated to 140 ~ 160 DEG C, join in colloidal mill simultaneously, short mix is even, and obtaining solid content is 55% hydrotalcite-modified emulsified bitumen.
Embodiment 4
Preparation peels off state houghite colloidal solution with step 1 in embodiment 1, and wherein the solid content of hydrotalcite is 1.8%.
0.6 part of octadecyl trimethyl ammonium chloride is joined 40 parts and peel off state houghite colloidal solution, finally mixing solutions is heated to 55 ~ 60 DEG C, adjust ph to 5 ~ 6,60 parts of SBS modifying asphalts are heated to 140 ~ 160 DEG C, join in colloidal mill simultaneously, short mix is even, and obtaining solid content is 60% hydrotalcite-modified emulsified bitumen.
Table 1 basic asphalt performance index.
| Project | AH-90 | SBS modifying asphalt |
| Penetration degree (25 DEG C), 0.1mm | 97 | 82 |
| Softening temperature, DEG C | 46.5 | 68 |
| Ductility, cm | 150（15℃） | 48（5℃） |
The hydrotalcite-modified emulsified bitumen performance index of table 2.
| Test subject | Unit | Analytical procedure | Embodiment 1 | Embodiment 2 |
| De-emulsification speed | — | T0658 | In split | In split |
| Particle charge | — | T0653 | + | + |
| Residual content (1.18mm) on sieve | ％ | T0652 | 0.01 | 0.03 |
| Evaporation of residual properties | ||||
| Content | ％ | T0651 | 55 | 60 |
| Penetration degree (100g, 25 DEG C, 5s) | dmm | T0604 | 83 | 80 |
| Softening temperature | ℃ | T0606 | 48.6 | 49.2 |
| Ductility | cm | T0605 | 110（15℃） | 110（15℃） |
| Package stability, 1 day | % | T0655 | 0 | 0.1 |
| Package stability, 5 days | % | T0655 | 0.2 | 0.3 |
Table 2(continues) hydrotalcite-modified emulsified bitumen performance index.
| Test subject | Unit | Analytical procedure | Embodiment 3 | Embodiment 4 |
| De-emulsification speed | — | T0658 | In split | In split |
| Particle charge | — | T0653 | + | + |
| Residual content (1.18mm) on sieve | ％ | T0652 | 0.05 | 0.08 |
| Evaporation of residual properties | ||||
| Content | ％ | T0651 | 55 | 60 |
| Penetration degree (100g, 25 DEG C, 5s) | dmm | T0604 | 72 | 73 |
| Softening temperature | ℃ | T0606 | 70 | 69.5 |
| Ductility | cm | T0605 | 30（5℃） | 32（5℃） |
| Package stability, 1 day | % | T0655 | 0.1 | 0.1 |
| Package stability, 5 days | % | T0655 | 0.2 | 0.3 |
As can be seen from upper table data, for hydrotalcite-modified emulsified bitumen, penetration degree is all on a declining curve, and softening temperature raises to some extent, ductility slightly declines, there is good preservation stability, illustrate after adding stripping state hydrotalcite, peel off hydrotalcite laminate and be dispersed in pitch, be equivalent to numerous small aggregate particulate, bituminous material is combined tightly, in addition the toughness of laminate, its fragility of low temperature and low-temperature performance can be resisted.Peel off adding of hydrotalcite, add the force of cohesion of bituminous material, improve viscosity, make not yielding, the softening and flowing of bituminous material under high temperature, thus be conducive to the raising of its high-temperature behavior, be also conducive to frictional behaviour and the ageing resistance of improving pitch in addition.
Claims (10)
1. an inorganic layered compounds modified emulsifying asphalt, is characterized in that comprising by mass parts:
Basic asphalt: 20 ~ 80 parts;
Peel off state houghite colloidal solution: 20 ~ 80 parts;
Emulsifying agent: 0.04 ~ 1.6 part;
The solid masses content wherein peeling off state houghite colloidal solution is 0.05 % ~ 2%.
2. according to emulsified bitumen according to claim 1, it is characterized in that: basic asphalt consumption is 35 ~ 50 parts, peeling off state houghite colloidal solution consumption is 35 ~ 50 parts.
3. according to emulsified bitumen according to claim 1, it is characterized in that: basic asphalt is petroleum pitch or polymer modified asphalt.
4. according to emulsified bitumen according to claim 1, it is characterized in that: peeling off state houghite colloidal solution is obtained through heated and stirred by lactate intercalated houghite and water.
5. according to emulsified bitumen according to claim 4, it is characterized in that: the molecular formula of lactate intercalated houghite is [Mg
1-xal
x(OH)
2] (C
3h
5o
3)
y(CO
3)
zmH
2o, x=0.2 ~ 0.33, y=0.068 ~ 0.33, z=0 ~ 0.066,0.1≤m≤0.8, x=y+z+z, wherein C
3h
5o
3represent lactate, CO
3represent carbonate.
6. according to emulsified bitumen according to claim 1, it is characterized in that: emulsifying agent is cationic emulsifier, amphoteric emulsifier and nonionic emulsifying agent.
7. according to the emulsified bitumen described in claim 1 or 6, it is characterized in that: emulsifying agent is one or more in quaternary ammonium salt, tetrahydroglyoxaline, aminated lignin, amino acid sodium and alkyl Pluronic F-127 ether.
8. the preparation method of emulsified bitumen described in the arbitrary claim of claim 1 to 7, is characterized in that comprising following process:
(1) lactate intercalated houghite, water are added reactor, heated and stirred reaction 0.5 ~ 24h, obtains peeling off state houghite colloidal solution;
(2) emulsifying agent is dissolved in peels off in state houghite colloidal solution, be heated to 55 ~ 65 DEG C, be prepared into mixing solutions, adjust ph 5 ~ 6, and basic asphalt joins colloidal mill simultaneously and mixes rapidly, can obtain inorganic layered compounds modified emulsifying asphalt.
9. in accordance with the method for claim 8, it is characterized in that: peeling off state houghite colloidal solution is obtained in heated and stirred method by lactate intercalated houghite and water, and Heating temperature is 25 ~ 200 DEG C, and heat-up time is 0.5 ~ 24h.
10. in accordance with the method for claim 9, it is characterized in that: Heating temperature is 90 ~ 150 DEG C.
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