CN106633946B - A kind of rubber powder modified emulsified asphalt and preparation method thereof - Google Patents
A kind of rubber powder modified emulsified asphalt and preparation method thereof Download PDFInfo
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- CN106633946B CN106633946B CN201510732843.5A CN201510732843A CN106633946B CN 106633946 B CN106633946 B CN 106633946B CN 201510732843 A CN201510732843 A CN 201510732843A CN 106633946 B CN106633946 B CN 106633946B
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Abstract
The invention discloses a kind of rubber powder modified emulsified asphalts and preparation method thereof.Its formula includes matrix pitch and rubber powder dispersion liquid to the rubber powder modified emulsified asphalt by weight, wherein matrix pitch 45%~58%, rubber powder dispersion liquid 42%~55%, rubber powder dispersion liquid by weight its formula include: pretreatment of rubber powder 20%~25%, emulsifier A 0.5%~1.0% and surplus water.Rubber powder modified emulsified asphalt of the invention can keep stable the long period, and evaporated residue performance is significantly better than rubber asphalt technical requirement.
Description
Technical field
The present invention relates to a kind of emulsified asphalt and preparation method thereof, specifically a kind of rubber powder modified emulsified asphalt and its
Preparation method.
Background technique
Rubber powder is modified pitch, can improve pitch low-temperature resistance cracking, it is anti-aging, antifatigue, prolong the service life,
The advantages that improving asphalt high-temperature stability, so development is very fast in recent years.The preparation of waste Crumb rubber modified asphalt mostly uses " dry
Method " and " wet process " two kinds of techniques.It is main at present to use " wet process " technique, in the preparation of " wet process " waste rubber powder modified asphalt, in order to
Asphalt performance is significantly improved, rubber powder additional amount is larger, generally 15wt% or more, and since the additional amount of rubber powder is big, material is viscous
It is thick, therefore processing temperature is higher (180 ~ 200 DEG C), higher processing temperature not only causes the aging of matrix pitch, but also energy consumption
Higher, construction is inconvenient, and bitumen flue gas discharge is big, and environmental pollution is serious.
In recent years, for the advantage and disadvantage of rubber asphalt, some researchers carry out the research of rubber powder modified emulsified asphalt, more
Mend rubber powder and asphalt disadvantage present in processing and work progress.
CN201010521004.6 discloses a kind of rubber powder modified emulsified asphalt and preparation method thereof, and this method is as follows: will
Pitch is prepared into emulsified asphalt；Rubber powder is surface-treated using one of desulfurization, activation, silication or a variety of methods；
Compound combined processing liquid is obtained by SBS lotion, SBR lotion, regeneration latex solution, several in soap lye；After surface treatment
Rubber powder is mixed and is stirred with combined processing liquid, the rubber powder after obtaining combined processing；By after combined processing rubber powder with
The emulsified asphalt being prepared into is mixed to prepare rubber powder modified emulsified asphalt.Rubber powder modified emulsified asphalt prepared by this method is
The mixture of treated rubber powder and emulsified asphalt, the performance of rubber powder cannot be not fully exerted.
CN201310310388.0 discloses a kind of shoddy modified emulsifying asphalt and preparation method thereof.This is using using 20
~80 mesh rubber powders are first prepared into rubber powder modified asphalt and emulsification soap lye, then the two are mixed and is emulsified, and obtain shoddy
Modified emulsifying asphalt.Wherein, rubber powder modified asphalt viscosity is larger, in emulsion process, because and soap lye mixing, temperature reduce,
Viscosity can be bigger, causes emulsification difficult, the emulsified asphalt of preparation is also easy to appear demulsifying phenomenon.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of preparation methods of rubber powder modified emulsified asphalt.The present invention
Rubber powder modified emulsified asphalt stability it is good, solid content is high, and evaporated residue (rubber asphalt) performance is significantly better than rubber asphalt
Technical requirement.
Rubber powder modified emulsified asphalt of the invention, by weight its formula include:
(1) matrix pitch 45%~58%；
(2) rubber powder dispersion liquid 42%~55%；
Wherein its formula includes: rubber powder dispersion liquid by weight
(1) pretreatment of rubber powder 20%~25%；
(2) emulsifier A 0.5%~1.0%；
(3) water surplus.
Matrix pitch of the present invention is (25 DEG C) of needle penetration for 60~140 1/10mm, and ductility (15 DEG C) is greater than
The A grade pitch or blend asphalt of 150cm.
Rubber used in the present invention can be waste old, such as scrap tire rubber.The pretreatment of rubber powder is logical
Cross the rubber powder more than or equal to 60 mesh sieve, the rubber powder obtained after surface swelling, microwave treatment.Wherein surface swelling
Method is to carry out spray treatment to rubber powder using oily emulsion, wherein oily emulsion: the weight ratio of rubber powder is 20~30:80
~70.In the present invention, wherein the composition of oily emulsion by weight, including oil 82%~91%, emulsifier B 4%~8%, methanol
And/or water 5%~10%, wherein emulsifier B is selected from one of neopelex, tween and this disk class emulsifier or more
Kind, oil can be one of diesel oil, kerosene or a variety of.
In the present invention, the condition of the microwave treatment in the pretreatment of rubber powder is as follows: power is 500~1000W, micro-
Wave is handled the time 5~10 minutes.
In the present invention, the rubber powder dispersion liquid is to stir pretreatment of rubber powder, emulsifier A and water according to the above ratio to mix
Conjunction uniformly forms it into suspension, is added in milling apparatus is ground later, make rubber particle less than 1 micron, grinding temperature
It is 40~60 DEG C.
In the present invention, rubber powder dispersion liquid milling apparatus used when preparing can be disc type milling apparatus, grinding
Method can be ground using iterative cycles, and mill gap is gradually reduced during circular grinding, to make rubber powder dispersion emulsion
Middle rubber particle is less than 1 micron.
In the present invention, the emulsifier A can be anion emulsifier, such as: disproportionated rosin potassium soap, oleate soap, tristearin
At least one of sour soap, benzene sulfonic acid sodium salt.
The preparation method of rubber powder modified emulsified asphalt of the invention, comprising:
(1) spare after matrix pitch being heated to 150~160 DEG C；
(2) rubber powder dispersion liquid and matrix pitch are slowly added into colloid mill, grind 3~5 minutes and discharge, is cooled to room
Temperature obtains rubber powder modified emulsified asphalt prepared by the present invention.
Compared with prior art, the present invention has a characteristic that
Rubber powder dispersion liquid is small using pretreatment of rubber powder and rubber powder partial size made of emulsifier A and water in the present invention
In 1 micron of dispersion liquid, wherein pretreatment of rubber powder is that the method combined using specific surface swelling and microwave treatment is obtained
It arrives, i.e., after rubber powder carries out appropriate surface swelling with oily emulsion, recycles microwave treatment, on the one hand make oily emulsion broken
Cream, rubber powder can absorb the oily matters such as a certain amount of diesel oil or kerosene after demulsification, carry out high temperature swelling under microwave condition, separately
The part water that one side rubber powder can absorb, this part water can form overheat due to having strong absorbability to microwave
Center, while thermal cracking is carried out to rubber powder, and then rubber powder is made to be transformed into linear structure from original cross-linked network.By
The pretreatment of rubber powder that the method obtains grinds under the action of emulsifier and water and obtains little particle of the partial size less than 1 micron.By
The rubber powder modified emulsified asphalt stability of the method for the present invention preparation is good, and rubber powder is less prone to sedimentation in emulsified asphalt system,
Solid content is high, and the performance of evaporated residue (rubber asphalt) is significantly better than rubber asphalt technical requirement (JT/T 798-
2011).
Specific embodiment
Below will by means of embodiment, the present invention is further illustrated, but following embodiment is not constituted to of the invention
Limitation.In the present invention, wt% is mass fraction.
Embodiment 1
(1) No. 0 diesel oil, Span-80 and water are emulsified to obtain oily emulsion by weight 88:6:6.Using spraying
Mode to 60 mesh rubber powders carry out swelling, stirred while being sprayed, wherein oily emulsion is with 60 mesh rubber powder weight ratios
25:75.Microwave treatment 10 minutes under 600w power later；
(2) by 60 mesh pretreatment of rubber powder, oleate soap and the water after microwave treatment in (1) by weight 20:0.6:79.4
Being uniformly mixed makes rubber powder form suspension, is added in disc type milling apparatus carries out iterative cycles grinding later, recycling
It is gradually reduced mill gap in process of lapping, is ground by iterative cycles, makes in rubber powder dispersion emulsion rubber particle less than 1 micron
(being tested using laser particle analyzer), stops grinding, and rubber powder dispersion liquid temperature is made to be maintained at 40~60 DEG C later；
(3) it prepares rubber powder modified emulsified asphalt: the 70A matrix pitch for accounting for rubber powder modified emulsified asphalt 52wt% is heated to
150~160 DEG C.It is that 48:52 is added slowly together colloid that step (2) is obtained rubber powder dispersion liquid and matrix pitch by weight
In mill, discharges within circular grinding 3~5 minutes, be cooled to room temperature and obtain rubber powder modified emulsified asphalt prepared by the present invention.Rubber powder changes
Property emulsified asphalt property is shown in Table 1.
Embodiment 2
(1) No. 0 diesel oil, Tween-80 and water are emulsified to obtain oily emulsion by weight 85:8:7.Using spraying
Mode to 60 mesh rubber powders carry out swelling, stirred while being sprayed, wherein oily emulsion is with 60 mesh rubber powder weight ratios
30:70.Microwave treatment 5 minutes under 1000w power later；
(2) by 60 mesh pretreatment of rubber powder, disproportionated rosin potassium soap and the water after microwave treatment in (1) by weight 20:
0.6:79.4, which is uniformly mixed, makes rubber powder form suspension, and progress iterative cycles in disc type milling apparatus are added later and grind
Mill is gradually reduced mill gap during circular grinding, is ground by iterative cycles, keep rubber particle in rubber powder dispersion emulsion small
In 1 micron (testing using laser particle analyzer), stop grinding later, and rubber powder dispersion liquid temperature is made to be maintained at 40~60 DEG C；
(3) it prepares rubber powder modified emulsified asphalt: the 90A matrix pitch for accounting for rubber powder modified emulsified asphalt 50wt% is heated to
150~160 DEG C.It is that 50:50 is added slowly together colloid that step (2) is obtained rubber powder dispersion liquid and matrix pitch by weight
In mill, discharges within circular grinding 3~5 minutes, be cooled to room temperature and obtain rubber powder modified emulsified asphalt prepared by the present invention.Rubber powder changes
Property emulsified asphalt property is shown in Table 1.
Embodiment 3
(1) it by kerosene, Span-80, Tween-80 and water by weight 85:4:4:7, is emulsified to obtain oily emulsion.
Swelling is carried out to 80 mesh rubber powders by the way of spraying, is stirred while being sprayed, wherein oily emulsion and 80 mesh rubber powders
Weight ratio be 30:70.Microwave treatment 8 minutes under 600w power later；
(2) being uniformly mixed 80 mesh pretreatment of rubber powder, benzene sulfonic acid sodium salt and water by weight 23:0.8:76.2 makes rubber
Rubber powder forms suspension, is added in disc type milling apparatus carries out iterative cycles grinding later, gradually subtract during circular grinding
Small mill gap, is ground by iterative cycles, surveys rubber particle in rubber powder dispersion emulsion (using laser particle analyzer less than 1 micron
Examination), stop grinding later, and rubber powder dispersion liquid temperature is made to be maintained at 40~60 DEG C；
(3) it prepares rubber powder modified emulsified asphalt: the 90A matrix pitch for accounting for rubber powder modified emulsified asphalt 48wt% is heated to
150~160 DEG C.It is that 52:48 is added slowly together colloid that step (2) is obtained rubber powder dispersion liquid and matrix pitch by weight
In mill, discharges within circular grinding 3~5 minutes, be cooled to room temperature and obtain rubber powder modified emulsified asphalt prepared by the present invention.Rubber powder changes
Property emulsified asphalt property is shown in Table 1.
Comparative example 1
This comparative example prepares rubber powder modified emulsified asphalt by method disclosed in CN201010521004.6, has carried out 8 days
Storage stability is investigated.
Prepare emulsified asphalt: using cationic emulsifier octadecyltrimethylammonium chloride, by No. 90 Liaohe River matrix pitches
The spray-type emulsified asphalt for being emulsified into solid content 55wt% is spare.
600 grams of 20 mesh waste tyre rubber powder is chosen, 7.2 grams of Silane coupling agent KH550s are added, adds 1.8 gram of 420 activation
Agent stirs at low speed (300~1000 revs/min) 5 minutes in blending tank, is warming up to 150 DEG C, holds warm 60min, adds after cooling
Enter 450 grams of combined processing liquid, combined processing liquid is by 2 mass parts SBR emulsions, 2 mass parts regeneration latex solution and 6 mass parts soap lye groups
At, then stir at low speed (300~1000 revs/min) 5 minutes；(emulsification drip is added in emulsified asphalt in rubber powder after combined processing
Green: the rubber powder after combined processing is 4:1), then overground 2 times with high-speed shearing machine, rubber powder modified asphalt is made, the results are shown in Table 1.
Comparative example 2
Rubber powder modified emulsified asphalt is prepared according to the method for comparative example 1, wherein by after the resulting combined processing of comparative example 1
Further microwave treatment 5 minutes under 1000w power of rubber powder.Rubber powder modified emulsified asphalt storage stability the results are shown in Table 1.
Comparative example 3
This comparative example prepares rubber powder modified emulsified asphalt by method disclosed in CN201310310388.0, has carried out 8 days
Storage stability is investigated.
By the sulphur of 1.8g, 60 mesh of 36g shoddy after mixing, 5min is irradiated in 450W micro-wave oven, then
It is added to 562.2g, in the composition for 90A, 36g catalytic cracked oil pulp that temperature is 200 DEG C, develops 15min, then shear 40min
Prepare modified pitch；Separately by 10g cationic emulsifier Redicote E-4875,5g calcium chloride, 5g polyvinyl alcohol,
The mixture of 10gSBR latex is added in 60 DEG C of water, and pH is adjusted to 2 after mixing evenly；Then the modified pitch that will be prepared
Emulsification rubber powder modified asphalt can be prepared after shearing 10min in high-speed shearing machine with emulsifier soap lye.Its storage stability
Test result is shown in Table 1.
Comparative example 4
(1) swelling treatment is carried out to 80 mesh rubber powders using No. 0 diesel oil, wherein No. 0 diesel oil: the weight ratio of 80 mesh rubber powders is
36:64, after being disposed under 600w power microwave treatment 8 minutes, it is stand-by after being disposed；
(2) 70A pitch is heated to 180~190 DEG C, the treated rubber powder of 5wt% is added in 180~190 DEG C of items
Under part, shearing 2h is stand-by；
(3) the disproportionation rosin potash soap liquid of formulation content 0.5wt%, add appropriate NaOH soap lye pH value adjusted to 11~
12 is stand-by, and 50~60 DEG C of soap lye temperature.
(4) rubber powder modified emulsified asphalt is prepared.By what is configured in the rubber powder modified asphalt of step (2) preparation and step (3)
Soap lye is 60:40 by weight, and two kinds of substances are emulsified by colloid mill, finally obtain rubber powder modified emulsified asphalt.Glue
Powder modified emulsifying asphalt property is shown in Table 1.
Comparative example 5
(1) by 80 mesh rubber powders under 600w power microwave treatment 8 minutes, it is stand-by after being disposed；
(2) rubber powder, benzene sulfonic acid sodium salt and water that are disposed in (1) are stirred by weight 23.0:0.8:76.2
So that rubber powder is formed suspension, is added in disc type milling apparatus carries out iterative cycles grinding later, in circular grinding process
In be gradually reduced mill gap, ground by iterative cycles, make in rubber powder dispersion emulsion rubber particle less than 1 micron (using laser
Particle size analyzer test), stop grinding later, and rubber powder dispersion liquid temperature is made to be maintained at 40~60 DEG C；
(3) it prepares rubber powder modified emulsified asphalt: the 90A matrix pitch for accounting for rubber powder modified emulsified asphalt 48wt% is heated to
150~160 DEG C spare.It is that 52:48 is added slowly together that step (2) is obtained rubber powder dispersion liquid and matrix pitch by weight
In colloid mill, discharges within circular grinding 3~5 minutes, be cooled to room temperature and obtain rubber powder modified emulsified asphalt.Rubber powder modified emulsification drip
Green property is shown in Table 1.
The property of 1 rubber powder modified emulsified asphalt of table
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Rubber asphalt technical requirements (JT/T 798-2011) |
| Solid content, wt% | 61.6 | 60 | 60 | |
| Storage stability*(1d), % | 0.8 | 0.6 | 0.5 | |
| Storage stability**(5d), % | 4.6 | 4.4 | 4.2 | |
| Storage stability (8d), % | 6.8 | 6.0 | 5.5 | |
| Evaporated residue (rubber asphalt) | ||||
| Rubber powder content, wt% | 15.6 | 16.6 | 20 | |
| Needle penetration (25 DEG C), 0.1mm | 56 | 53 | 49 | 40-60 |
| Softening point/DEG C | 56 | 59 | 62 | > 58 |
| Ductility (5 DEG C, 1cm/min), cm | 15 | 16 | 17 | > 10 |
| Elasticity restores (25 DEG C), % | 65 | 70 | 75 | > 55 |
| Rotary viscosity (180 DEG C), Pa.s | 2.1 | 2.2 | 2.5 | 2.0-4.0 |
Continued 1
| Project | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Rubber asphalt technical requirements (JT/T 798-2011) |
| Solid content, wt% | — | — | 60 | 60 | 60 | |
| Storage stability*(1d), % | — | — | 0.5 | 1.5 | 1.5 | |
| Storage stability**(5d), % | < 5 | < 5 | 6.8 | 7.0 | 6.2 | |
| Storage stability (8d), % | 9.0 | 9.2 | 9.5 | 10 | 8.5 | |
| Evaporated residue (rubber asphalt) | ||||||
| Rubber powder content, wt% | — | — | 5.5 | 5 | 20 | |
| Needle penetration (25 DEG C), 0.1mm | 87 | 85 | 89 | 115 | 49 | 40-60 |
| Softening point, DEG C | 56 | 57 | 47 | 47 | 62 | > 58 |
| Ductility (5 DEG C, 1cm/min), cm | 18 | 17 | 55 | 8 | 14 | > 10 |
| Elasticity restores (25 DEG C), % | 65 | 66 | — | 35 | 58 | > 55 |
| Rotary viscosity (180 DEG C), Pa.s | 1.5 | 1.4 | — | 0.3 | 2.0 | 2.0-4.0 |
1 remarks of table: * is code requirement emulsified asphalt storage stability (1d) solid content≤1%；
* is code requirement emulsified asphalt storage stability (5d) solid content≤5%.
The advantages of in order to further embody rubber powder modified asphalt of the invention, in rubber powder modified asphalt storage stability side
Face has also carried out 8 days study on the stability, from Examples and Comparative Examples result in addition to the study on the stability for carrying out 1 day, 5 days
As can be seen that rubber powder modified emulsified asphalt stability prepared by the present invention and performance are substantially better than the rubber powder modified of comparative example preparation
Emulsified asphalt.Furthermore rubber powder content is higher in rubber powder modified asphalt evaporated residue (rubber asphalt) of the invention, residue
Performance is significantly better than rubber asphalt technical requirements (JT/T798-2011).
Claims (8)
1. a kind of rubber powder modified emulsified asphalt, its formula includes: by weight
(1) matrix pitch 45%~58%；
(2) rubber powder dispersion liquid 42%~55%；
Wherein its formula includes: rubber powder dispersion liquid by weight
(1) pretreatment of rubber powder 20%~25%；
(2) emulsifier A 0.5%~1.0%；
(3) water surplus；
The pretreatment of rubber powder is the rubber powder more than or equal to 60 mesh, the rubber obtained after surface swelling, microwave treatment
Rubber powder, wherein the method for surface swelling is to carry out spray treatment to rubber powder using oily emulsion, wherein oily emulsion: rubber powder
Weight ratio be 20~30:80~70；
The composition of the oily emulsion by weight, including oil 82%~91%, emulsifier B 4%~8%, methanol and/or water 5%
~10%, wherein emulsifier B is selected from one of neopelex, tween and this disk emulsifier or a variety of, and oil is bavin
One of oil, kerosene are a variety of.
2. pitch described in accordance with the claim 1, it is characterised in that: the matrix pitch is that 25 DEG C of needle penetrations are 60~140
1/10mm, 15 DEG C of ductilities are greater than the A grade pitch or blend asphalt of 150cm.
3. pitch described in accordance with the claim 1, it is characterised in that: rubber powder used is waste rubber powder.
4. pitch described in accordance with the claim 1, it is characterised in that: the condition of the microwave treatment in the pretreatment of rubber powder
It is as follows: power be 500~1000W, microwave treatment time 5~10 minutes.
5. according to pitch described in claim 1 or 3, it is characterised in that: the rubber powder dispersion liquid be by pretreatment of rubber powder,
Emulsifier A and water are uniformly mixed according to the above ratio forms it into suspension, is added in milling apparatus is ground later, make
For rubber particle less than 1 micron, grinding temperature is 40~60 DEG C.
6. pitch described in accordance with the claim 1, it is characterised in that: rubber powder dispersion liquid milling apparatus used when preparing is disc type
Milling apparatus, grinding method are ground using iterative cycles, and mill gap is gradually reduced during circular grinding, to make rubber powder
Rubber particle is less than 1 micron in dispersion emulsion.
7. pitch described in accordance with the claim 1, it is characterised in that: the emulsifier A be disproportionated rosin potassium soap, oleate soap,
At least one of stearate soap, benzene sulfonic acid sodium salt.
8. the preparation method of any rubber powder modified emulsified asphalt of claim 1~7, comprising:
(1) spare after matrix pitch being heated to 150~160 DEG C；
(2) rubber powder dispersion liquid and matrix pitch are slowly added into colloid mill, grind 3~5 minutes and discharge, is cooled to room temperature i.e.
Obtain rubber powder modified emulsified asphalt.
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Citations (4)
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|---|---|---|---|---|
| CN1597782A (en) * | 2003-09-17 | 2005-03-23 | 西北师范大学 | Composite of modified road asphalt by microwave radiating old rubber powder and its preparation process |
| CN101831184A (en) * | 2010-03-23 | 2010-09-15 | 江汉大学 | Pitch modified from waste tire rubber powder and preparation method thereof |
| CN103881401A (en) * | 2013-07-23 | 2014-06-25 | 华东理工大学 | Waste rubber powder-modified emulsified asphalt and preparation method thereof |
| CN104559242A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Waste rubber powder modified asphalt composition and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9458320B2 (en) * | 2013-09-18 | 2016-10-04 | Innovative Polymer Solutions, Inc. | Pre-swelled ground tire rubber and methods of making and using the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597782A (en) * | 2003-09-17 | 2005-03-23 | 西北师范大学 | Composite of modified road asphalt by microwave radiating old rubber powder and its preparation process |
| CN101831184A (en) * | 2010-03-23 | 2010-09-15 | 江汉大学 | Pitch modified from waste tire rubber powder and preparation method thereof |
| CN103881401A (en) * | 2013-07-23 | 2014-06-25 | 华东理工大学 | Waste rubber powder-modified emulsified asphalt and preparation method thereof |
| CN104559242A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Waste rubber powder modified asphalt composition and preparation method thereof |
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