CN104610769B - A kind of preparation method of high-strength cold laid asphaltic compound - Google Patents
A kind of preparation method of high-strength cold laid asphaltic compound Download PDFInfo
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- CN104610769B CN104610769B CN201510068521.5A CN201510068521A CN104610769B CN 104610769 B CN104610769 B CN 104610769B CN 201510068521 A CN201510068521 A CN 201510068521A CN 104610769 B CN104610769 B CN 104610769B
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Abstract
The present invention relates to a kind of preparation method of high-strength cold laid asphaltic compound.High-strength cold laid asphaltic compound is as follows with the specific components by weight percent of normal temperature modified pitch：58~64 parts of asphalt；21~30 parts of response type diluent；11~14 parts of diluent；0.01~1 part of fire retardant；0.01~1 part of modifying agent.Viscosity is small at normal temperatures for the normal temperature modified pitch of the present invention, with good construction workability；Normal temperature modified asphalt softening point is higher than common petroleum pitch, while elastic restoration ratio is big, surface drying time is short and curing molding speed is fast, with gathering materials that to wrap power strong.With the cold laid asphaltic compound prepared by it compared with conventional cold-mix asphalt compound, early strength formation speed is fast after paving, and shaping strength is high, and the open to traffic time is short；Its high-temperature behavior, water stability, cryogenic property can reach hot-mix asphalt mixture technical requirements simultaneously；And preparation method is easy, economical, environmentally friendly, energy-conservation.
Description
Technical field
The present invention relates to a kind of normal temperature modified pitch, the preparation method of the normal temperature modified pitch, and changed using the normal temperature
The method that property pitch prepares cold laid asphaltic compound.
Background technology
By the end of the year in 2013, highway in China net total kilometrage reached 398.4 ten thousand km, has increased 63.9 ten thousand km between 5 years newly.Its
In, highway has increased 3.3 ten thousand km newly, occupies second place of the world.It is almost bituminous concrete entirely in built highway
Road surface.Bituminous paving has pavement performance excellent, and driving is comfortable, driving noise is small, easy to maintenance, construction speed is fast, dust pollution
Few many advantages, such as, the principal mode laid as each standard highway of China and urban road.
Now, bituminous paving is mainly and uses hot-mix asphalt mixture in road construction, but hot-mix asphalt mixture is constructed
Temperature height, high energy consumption, process are numerous and diverse and seriously polluted.And pitch long-time heating in mix, transport, paving process, can also
" heat " aging phenomenon is produced, road life can be not only severely impacted, can also produce series of negative effect：1st, energy resource consumption
Amount is big, pollutes environment；2nd, equipment complexity, cost are high；3rd, big by seasonal effect, effective engineering time is short.
Based on a part of deficiency of above-mentioned hot-mix asphalt mixture itself, the appearance of Cold bituminous mixture can solve these
Technical barrier.It is applied to a variety of climatic environments, it is not necessary to be heated at high temperature, and power consumption low stain is small, easy to use, and construction is simple,
Required equipment requirement is also low, can be not only used for repairing bituminous paving, it may also be used for paving.Present China is to environmental issue
Increasingly pay attention to, therefore be also increasingly necessary using the asphalt material of low-energy environment-friendly.
The normal temperature pitch of Current Domestic research is broadly divided into two major classes：Emulsified asphalt and cut-back asphalt.The former due to containing
Water, anti-water damage property, adhesive property are poor；The latter contains Macrodilution agent, and volatilization needs a period of time, therefore intensity is formed
Speed is slow.The normal temperature asphalt material performance of external import is higher, but its is expensive, and user is difficult to bear, it is impossible in engineering
Largely use；The research of normal temperature modified pitch and its preparation technique is actively developed, there is highly important meaning.
The content of the invention
The present invention provides a kind of preparation method of high-strength cold laid asphaltic compound, to solve cold laid asphaltic under existing normal temperature
Compound low intensity, the slow technical problem of intensity synthesis speed；And solve current preparation technology complexity, the problem of cost is high.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of preparation side of high-strength cold laid asphaltic compound
Method, its each raw material components are as follows by weight ratio：
The normal temperature modified pitch of high-strength cold laid asphaltic compound as described above, preferably：The response type diluent
One or more for ethylene glycol, 1,2- butanediols, plant asphalt, plant polyatomic alcohol are mixed.
The normal temperature modified pitch of high-strength cold laid asphaltic compound as described above, preferably：The diluent is positive heptan
Alkane, tetrahydrofuran, acetone, the one or more of petroleum ether are mixed.
In above-mentioned technical proposal of the present invention, preferably：The fire retardant is three（2,3- dibromopropyls）Fulminuric acid
The one or more of ester, melamine phosphate and ammonium polyphosphate flame retardant are mixed.The modifying agent is styrene-fourth two
Alkene-styrene block copolymer, the one or more of butadiene-styrene rubber are mixed.
The present invention also provides the method for preparing the normal temperature modified pitch of high-strength cold laid asphaltic compound as described above, by such as
Lower step is carried out：
Step one, heat oil pitch is stirred to 130 DEG C under 500 r/min speed, while adding response type dilution
Agent, stirs 15~30 min, until pitch is mixed uniform；
Asphalt flame-retardant agent, modifying agent, are added in the mixed liquor that step one is prepared by step 2 at 100 DEG C by proportioning,
Stirring shearing is further continued for 10~20min of stirring to agranular uniform state under 3000 r/min speed；
Diluent, is added in the mixed liquor that step 2 is prepared, is stirred under 1000r/min speed by step 3 at 90 DEG C
Mix to uniform state, be further continued for 10~20min of stirring, sealed type storage.
The present invention also provides a kind of method for preparing high-strength cold laid asphaltic compound, carries out as follows：
Step one, it will gather materials under normal temperature condition, normal temperature modified pitch is poured into mix pot, be stirred under 60r/min speed
60s is mixed, normal temperature modified pitch is dispersed in surface of aggregate；
Step 2, pours into miberal powder at normal temperatures, 60s is stirred under 100r/min speed, then continue under 60r/min speed
60s is stirred, makes to gather materials and uniformly wraps up in attached asphalite arogel slurry and without grey point；
Step 3, pours into high activity direct putting type intensity adjustment additive, and 120s is stirred under 60r/min speed when adding
To uniform, high-strength cold laid asphaltic compound is produced.
The method for preparing high-strength cold laid asphaltic compound as described above, preferably：The high activity direct putting type intensity is adjusted
Section additive is that one or both of diisocyanate, polyisocyanates are mixed.
The beneficial effects of the invention are as follows：
1st, normal temperature modified pitch of the invention has good mobility, workability.Response type diluent kinematic viscosity is less than 1
PaS, and have good compatibility with pitch, the normal temperature mobility of pitch can be effectively improved, meanwhile, add a small amount of diluent
Reconciled so that the kinematic viscosity of product of the present invention at normal temperatures is less than 3 PaS, with good construction workability, meets
The mix requirement of asphalt.
2nd, asphalt intensity of the present invention is high.The high activity direct putting type intensity adjustment of asphalt addition of the present invention adds
Plus agent has-NCO group, unsaturated bond and the active group-OH in response type diluent of its high activity can quickly occur admittedly
Change reaction generation elastomer.The present invention reduces the usage amount of volatile-type solvent, the high activity direct putting type intensity adjustment of use adds
Plus agent improves the early strength formation speed of normal temperature compound, early strength can account for the 70~80% of overall strength, i.e. open to traffic
Time shortens, while its shaping strength is also very high, can reach hot-mix asphalt mixture intensity requirement, hence it is evident that better than other kinds of
Cold-mix asphalt compound.
3rd, asphalt membrane thickness of the invention is big, wraps power strong.The elastomer of curing reaction generation and the cohesive force gathered materials are strong,
The asphalt membrane thickness gathered materials can be effectively increased, while having excellent wearability and mechanical strength, enhancing wraps power and improved and drips
Blue or green film strength.
4th, Asphalt Mixture Performance of the present invention is excellent.Response type diluent and high activity direct putting type intensity in the present invention
The thermoset elastomer of additive reaction generation is adjusted, the high-temperature behavior of asphalt can be effectively improved, make its chemical property
It is more stable, it is not easy to migration；Cryogenic property and water stability are also improved simultaneously, can reach the technology of hot-mix asphalt mixture
It is required that.
5th, preparation technology of the present invention is simple, cheap.Preparation technology of the present invention is simple, it is not necessary to large-scale special installation,
And preparation process is quick, economy, energy-saving and environmental protection, excellent performance, with very high application value.
Embodiment
The preparation method of the normal temperature modified pitch of specific embodiment is：
Step one, heating A grades of 70# pitches of shell are stirred to 130 DEG C under 500 r/min speed, while adding reaction
Type diluent, stirs 15~30 min, until pitch is mixed uniform；
Asphalt flame-retardant agent, modifying agent, are added in the mixed liquor that step one is prepared by step 2 at 100 DEG C by proportioning,
Stirring shearing is further continued for 10~20min of stirring to agranular uniform state under 3000 r/min speed；
Diluent, is added in the mixed liquor that step 2 is prepared, is stirred under 1000r/min speed by step 3 at 90 DEG C
Mix to uniform state, be further continued for 10~20min of stirring, sealed type storage.
The preparation method of the normal temperature modified asphalt of specific embodiment is：
Step one, it will gather materials and pour into mix pot with normal temperature modified pitch, make normal temperature modified pitch uniformly dispersing in the table that gathers materials
Face, 60s is stirred under 60r/min speed；
Step 2, pours into miberal powder, and 60s is stirred under 100r/min speed, and material to be mixed is homogeneous, then in 60r/min
60s is stirred under speed；
Step 3, uniformly pours into high activity direct putting type intensity adjustment additive, 120s is stirred under 60r/min speed, i.e.,
Obtain Cold bituminous mixture.
High activity direct putting type intensity adjustment additive described in the implementation of this example is methyl diphenylene diisocyanate
（MDI）.
It is described gather materials, miberal powder, modifying agent are satisfied by communications and transportation ministry standard JTG F40-2004《Asphalt highway is applied
Work technical specification》Associated specifications, the gradation types of Cold bituminous mixture of the embodiment of the present invention are AC-13C types, specifically
Material composition see the table below.
The principle and feature to the present invention are described with reference to embodiments, and the given examples are served only to explain the present invention,
It is not intended to limit the scope of the present invention.
Embodiment 1
Normal temperature modified pitch is made up of the raw material of following parts by weight：
In the present embodiment, response type diluent is that plant polyatomic alcohol, diluent are that normal heptane, fire retardant are DS-ZR pitches
Fire retardant, modifying agent are SBS.The present embodiment and following examples petrochina pitch
For A grades of 70# pitches of shell.
The indices testing result such as following table for the normal temperature modified pitch that embodiment 1 is prepared.
Each raw material components of normal temperature modified asphalt are as follows by weight ratio：
Normal temperature modified 4.7 parts of pitch；
Gather materials and 94.5 parts of miberal powder；
0.8 part of high activity direct putting type intensity adjustment additive.
The proportion relation of normal temperature modified pitch and intensity adjustment additive, so that active group-OH in response type diluent
Molal quantity：Active group-NCO is equal or close to 1 in intensity adjustment additive：1 determines.Normal temperature modified pitch and intensity
Regulation additive quality summation accounts for cold laid asphaltic compound 4~7%.
The compound that the normal temperature modified pitch prepared according to example 1 is formed with the aggregate blending of AC-13 types（By above-mentioned parts by weight
Proportioning）Performance such as following table.
Heat mixes A grades of 70# of matrix pitch, and manufacturer is shell, model AH-70.
Heat mixes SBS modified pitch, and manufacturer is shell, model I-D.
Embodiment 2
Normal temperature modified pitch is made up of the raw material of following parts by weight：
In the present embodiment, response type diluent is that 1,2- butanediols, diluent are that tetrahydrofuran, fire retardant are DS-ZR drips
Blue or green fire retardant, modifying agent are butadiene-styrene rubber.
The indices testing result such as following table for the normal temperature modified pitch that embodiment 2 is prepared.
Each raw material components of normal temperature modified asphalt are as follows by weight ratio：
Normal temperature modified 4.8 parts of pitch；
Gather materials and 94.5 parts of miberal powder；
0.7 part of high activity direct putting type intensity adjustment additive.
The compound that the liquid asphalt prepared according to example 2 is formed with the aggregate blending of AC-13 types（Match somebody with somebody by above-mentioned parts by weight
Than）Performance such as following table.
Embodiment 3
Normal temperature modified pitch is made up of the raw material of following parts by weight：
In the present embodiment, response type diluent is that plant asphalt, diluent are that acetone, fire retardant are DS-ZR asphalt flame-retardants
Agent, modifying agent are butadiene-styrene rubber.
The indices testing result such as following table for the normal temperature modified pitch that embodiment 3 is prepared.
Each raw material components of normal temperature modified asphalt are as follows by weight ratio：
Normal temperature modified 4.7 parts of pitch；
Gather materials and 94.5 parts of miberal powder；
0.8 part of high activity direct putting type intensity adjustment agent.
The compound that the liquid asphalt prepared according to example 3 is formed with the aggregate blending of AC-13 types（Match somebody with somebody by above-mentioned parts by weight
Than）Performance such as following table.
It can be drawn from the test result of three above embodiment, normal temperature modified pitch of the invention kinematic viscosity at normal temperatures
Less than 3PaS, with good construction workability, meets construction requirement；Normal temperature modified asphalt softening point is dripped higher than common petroleum
Green grass or young crops, while elastic recovery properties are excellent, and surface drying time is short, and curing molding speed is fast, with gathering materials that to wrap power strong.
High intensity cold black top compound prepared by the present invention is compared to other cold-mix asphalt compounds, early strength shape
It is fast into speed, the 70~80% of overall strength can be accounted for, shaping strength is high, that is, shortens the open to traffic time, intensity can reach heat and mix drip
Blue or green compound technical requirements；Its high-temperature behavior, water stability and cryogenic property can reach hot-mix asphalt mixture requirement simultaneously,
With good pavement performance；And easy, economic, environmental protection, energy-conservation are prepared, with very high application value.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (1)
1. a kind of preparation method of high-strength cold laid asphaltic compound,
It is characterized in that carrying out as follows：
Step one, it will gather materials under normal temperature condition, normal temperature modified pitch is poured into mix pot, be stirred under 60r/min speed
60s, makes normal temperature modified pitch be dispersed in surface of aggregate；
Step 2, pours into miberal powder at normal temperatures, and 60s is stirred under 100r/min speed, then continuation is stirred under 60r/min speed
60s, makes to gather materials and uniformly wraps up in attached asphalite arogel slurry and without grey point；
Step 3, pours into high activity direct putting type intensity adjustment additive, and 120s is stirred to equal under 60r/min speed when adding
It is even, produce high-strength cold laid asphaltic compound；
It is described gather materials gather materials for AC-13 types；The high activity direct putting type intensity adjustment additive is diisocyanate, polyisocyanic acid
One or both of ester is mixed；
Each raw material components of normal temperature modified pitch used are as follows by weight ratio：
58~64 parts of asphalt；
21~30 parts of response type diluent；
11~14 parts of diluent；
0.01~1 part of fire retardant；
0.01~1 part of modifying agent；
The response type diluent be ethylene glycol, 1,2- butanediols, plant asphalt, one or more mixing of plant polyatomic alcohol and
Into；
The diluent is normal heptane, tetrahydrofuran, acetone, the one or more of petroleum ether are mixed；
The fire retardant is three（2,3- dibromopropyls）Fulminuric acid ester, melamine phosphate and ammonium polyphosphate flame retardant
One or more are mixed；
The modifying agent is SBS, the one or more of butadiene-styrene rubber are mixed.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293994B (en) * | 2015-10-31 | 2018-03-09 | 山东大山路桥工程有限公司 | A kind of Colorful Asphalt Pavement mixture |
| CN105348827B (en) * | 2015-11-09 | 2018-10-19 | 长安大学 | A kind of solvent type asphalt cold repairing liquid and its preparation process |
| CN105712663A (en) * | 2016-01-25 | 2016-06-29 | 新疆富翔交通工程材料有限公司 | Bag-storable SMC normal temperature modified asphalt mixture |
| CN106673500A (en) * | 2016-06-23 | 2017-05-17 | 北京市政路桥建材集团有限公司 | Normal temperature asphalt mixture and its construction design method |
| CN106116269A (en) * | 2016-07-07 | 2016-11-16 | 沈阳建筑大学 | A kind of cold repairing asphalt mixture and preparation method thereof |
| CN107722651A (en) * | 2017-10-19 | 2018-02-23 | 上海市政工程设计研究总院（集团）有限公司 | It is a kind of can the quick high intensity micro-surface area bituminous cements of open to traffic preparation method |
| CN107778890A (en) * | 2017-10-19 | 2018-03-09 | 上海市政工程设计研究总院（集团）有限公司 | It is a kind of can quick open to traffic high intensity micro-surface area bituminous cements |
| CN108726924B (en) * | 2018-07-23 | 2019-10-08 | 湖南鑫长胜材料科技有限公司 | Response type Cold bituminous mixture and preparation method thereof |
| CN110054907B (en) * | 2019-05-10 | 2021-05-14 | 湖南鑫长胜材料科技有限公司 | Bio-based normal-temperature liquid asphalt and preparation method and application thereof |
| CN115180877A (en) * | 2022-07-06 | 2022-10-14 | 哈尔滨工业大学 | Composite cold-mixing cold-paving liquid asphalt mixture based on polymeric MDI (diphenylmethane diisocyanate) and preparation method thereof |
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| CN100443549C (en) * | 2003-12-28 | 2008-12-17 | 大连市政设施修建总公司 | Method for preparing cold stirring cold laying road asphalt |
| WO2005100481A1 (en) * | 2004-04-09 | 2005-10-27 | Kao Specialty Americas, Llc | Extended life slurry seal composition |
| CN102329102A (en) * | 2010-07-13 | 2012-01-25 | 上海道柯特沥青科技有限公司 | Hot-mix-cold-laid SBS (styrene butadiene styrene) modified asphalt mixture |
| CN102464892B (en) * | 2010-11-13 | 2013-10-16 | 万华化学集团股份有限公司 | Composite polyurethane modifier for road asphalt |
| CN103923475A (en) * | 2014-04-14 | 2014-07-16 | 长安大学 | Improved solvent cold laid asphalt as well as preparation process and using method thereof |
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