CN105504846B - High solids content is modified mid temperature pitch and preparation method thereof - Google Patents
High solids content is modified mid temperature pitch and preparation method thereof Download PDFInfo
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- CN105504846B CN105504846B CN201610079204.8A CN201610079204A CN105504846B CN 105504846 B CN105504846 B CN 105504846B CN 201610079204 A CN201610079204 A CN 201610079204A CN 105504846 B CN105504846 B CN 105504846B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Medicinal Chemistry (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of high solids content to be modified mid temperature pitch and preparation method thereof, and it is 75~82 parts of matrix pitches that it, which is formulated, 3~7 parts of medium temperature modifying agent, 11~22 parts of water.Described medium temperature modifying agent is made up of following components by mass fraction：5~10 part of 18/16 tertiary amine；5~12 parts of cationic additives, described cationic additive are selected from the hydroxypropyl-trimethyl ammonium chloride of 3 chlorine 2 and trimethyl lauryl ammonium chloride；1~5 part of methanol；40~50 parts of emulsifying agent, described emulsifying agent are selected from styrene butadiene styrene, butadiene-styrene rubber, polyethylene, acrylonitrile butadient styrene, high polymer polypropylene and polystyrene；1~3 part of calcium chloride；5~20 parts of deionized waters.The bitumen construction temperature range produced using the present invention is wider, can be constructed under the weather conditions higher than 0 DEG C, meet the demand of road maintenance under low temperature condition.
Description
Technical field
The present invention relates to the technology of preparing of the pitch in field of road, and medium temperature is modified in particular to a kind of high solids content
Pitch, the invention further relates to the preparation method that this high solids content is modified mid temperature pitch.
Background technology
Matrix pitch is to be used to produce modified pitch, the basic asphalt that admixture asphalt modifier is modified.If it is
Using oil through asphalt obtained from exploiting, refining processing, that is, matrix asphalt.For example, specifically, No. 70 A
Level pitch is a kind of common paveio(u)r.No. 70 A levels pitches are the natural material extracted in oil, after being heated in work progress
Asphalt is mixed to form with gathering materials.In construction, No. 70 A levels asphalt heating temperatures are 155~165 DEG C.Pitch is for a long time
The continuous aging of heating meeting, starts aging when temperature has reached 100 DEG C.
The mechanism and process of ageing of asphalt are as follows：
1. the mechanism of ageing of asphalt
Pitch " aging " refers to that pitch, by after refining out, in storage, transports, during construction and use from oil plant,
Due to long-time exposure in atmosphere, in the presence of environmental factor such as heated, oxygen, sunlight and water, it may occur that a series of
Volatilization, oxidation, polymerization, or even pitch internal structure change, while change of properties occurs, the mistake for causing pavement performance to deteriorate
Journey.Ageing of asphalt is a process gradually occurred, and its speed directly affects the service life on road surface, thus is to influence pitch
The principal element of pavement durability.
2. the aging in transport, storage, heating process
Pitch, until before mixing asphalt, remains loaded into the pitch of insulation after oil plant is refined out
In tank, the hot storage of pitch, hot transport, preheat, with the process such as allotment in oily kettle, often undergo very long in oil storage tank
Time.Due to the motion of temperature rise acceleration molecular, in addition to causing pitch and evaporating, moreover it is possible to cause pitch that some physical chemistry occur
Change.In this period, the mechanism of ageing of asphalt is mainly：
1. making the lightweight oil in pitch constantly volatilize due to heated, pitch is hardened and become fragile, reduce caking property：
2. some polymerisations can occur for the oxygen in the pitch and air contact, with air of reservoir surface, pitch also can
The a certain degree of aging of generation；
3. pitch constantly runs in pipeline and trickled down by tank roof in tank, the surface area increase of pitch, pitch
Oxidation reaction will occur.Because pitch is also stored in oil storage tank in this period, the quantity of pitch is more, depth is big, contact plus
The area of thermal source and air is smaller, so aging can't be very serious.Experiment proves, if pitch is sealed up for safekeeping by closed, and
And be no longer heat up, stored with cold conditions, can store and there will not be obvious aging in many years.Pitch is from oil plant to batching plant
Heating-up temperature is typically at 170 DEG C or so.Because oil tank is closed, ingress of air area is small, so this stage pitch is technical
It can have almost no change, therefore aging hardly occurs for pitch in transportation.
3rd, heating mix and stir and making in aging
The main and most conventional occupation mode of pitch, is the form of construction work using hot-mix asphalt mixture, now drips
It is blue or green to undergo an ageing process much more serious than storage process.Aging during mixing and stirring is most important, is generally referred to as
For heat ageing.
When pitch mixes in mixer with hot mineral aggregate, mineral aggregate temperature is generally up to 160~180 DEG C, and this is directly influenced
The oxidation of pitch and component volatilization.In addition to heating-up temperature, mixing time, asphalt content can also influence pitch during mixing and stirring
Aging.In general, mix and stir that temperature is higher, asphalt membrane is thinner, the aging of pitch is also more serious.
How construction when prevent ageing of asphalt be always skilled artisans recognize that problem and make great efforts explore side
To, but there is no gratifying technical scheme to come out up to now.
The content of the invention
In order to solve the above-mentioned drawback occurred in existing asphalt production and construction, the first object of the present invention seeks to provide
A kind of high solids content is modified mid temperature pitch, is made up of following components by mass fraction：75~82 parts of matrix pitches, 3~7 parts of medium temperatures
Modifying agent, 11~22 parts of water.
In above-mentioned technical proposal, described medium temperature modifying agent is made up of following components by mass fraction：
5~10 part of 18/16 tertiary amine；
5~12 parts of cationic additives, described cationic additive are selected from the chloro- 2- hydroxypropyls-trimethyl ammonium chlorides of 3-
And trimethyl lauryl ammonium chloride；
1~5 part of methanol；
40~50 parts of emulsifying agent, described emulsifying agent are selected from s-B-S, butadiene-styrene rubber, poly- second
Alkene, acrylonitrile-butadiene-styrene copolymer, high polymer polypropylene and polystyrene；
1~3 part of calcium chloride；
5~20 parts of deionized waters.
In above-mentioned technical proposal, described matrix pitch is matrix asphalt.
In above-mentioned technical proposal, 5 DEG C of ductilities that the high solids content is modified the pitch evaporated residue of mid temperature pitch are no less than
56.1cm；The softening point of evaporated residue is 85~97 DEG C；The needle penetration of evaporated residue is 5.8~6.6mm.
The second object of the present invention is to prepare the method that above-mentioned high solids content is modified mid temperature pitch, is comprised the following steps：
1) component than water of medium temperature modifying agent is dissolved in the deionized water no less than 60 DEG C, and be sufficiently mixed
Uniformly；
2) matrix asphalt is heated to more than 150 DEG C；
3) 75 DEG C~95 are maintained the temperature at after mixing medium temperature modifying agent and matrix asphalt and water that step 1) obtains
DEG C, stir；
4) at 90 DEG C, when mixing the viscosity of the modification mid temperature pitch of generation and being less than 3Pas, asphalt production terminates.
The drop temperature that the high solids content produced using the present invention is modified the compound of mid temperature pitch is no more than 120 DEG C.Phase
30~60 DEG C of asphalt drop temperature can be reduced than prior art, reduces the aging of pitch, energy-conserving and environment-protective.Meanwhile compared with
The generation of various volatile materials when low drop temperature can considerably reduce asphalt, air pollution is reduced, reduced
Actual bodily harm to workmen.
The construction temperature scope that the high solids content produced using the present invention is modified mid temperature pitch is wider, can be not less than 0 DEG C
Weather conditions under construct.And prior art modified pitch construction temperature cannot be below 10 DEG C of constructions, meet under low temperature environment
Road maintenance demand.
Embodiment
The equipment and technique of the present invention are described in further detail below in conjunction with specific embodiment.
The present invention devises a kind of formula of the modification mid temperature pitch of high solids content (solid content is up to up to more than 75%)
And preparation method thereof, bitumen construction temperature range can be broadened, can be constructed under 0 DEG C~10 DEG C of weather conditions；Compared to existing
Have the construction requirement that technology modified pitch construction temperature cannot be below 10 DEG C, can by it is annual can construction days can extend 60 days.
The high solids content is modified mid temperature pitch and is made up of following components by mass fraction：75~82 parts of matrix pitches：3~7
Part medium temperature modifying agent, 11~22 parts of water.
Described medium temperature modifying agent is made up of following components by mass fraction：
5~10 part of 18/16 tertiary amine；
5~12 parts of cationic additives, described cationic additive are selected from the chloro- 2- hydroxypropyls-trimethyl ammonium chlorides of 3-
And trimethyl lauryl ammonium chloride；
1~5 part of methanol；
40~50 parts of emulsifying agent, described emulsifying agent are selected from s-B-S, butadiene-styrene rubber, poly- second
Alkene, acrylonitrile-butadiene-styrene copolymer, high polymer polypropylene and polystyrene；
1~3 part of calcium chloride；
5~20 parts of deionized waters.
Described matrix pitch is the matrix asphalt of solid content more than 75%.Various reagents in above-mentioned formula
To be directly chemically commercially available at preparation supplier.
The preparation method that the high solids content is modified mid temperature pitch comprises the following steps：
1) component than water of medium temperature modifying agent is dissolved in the deionized water no less than 60 DEG C, and be sufficiently mixed
Uniformly；
2) matrix asphalt is heated to more than 150 DEG C；
3) 75 DEG C~95 are maintained the temperature at after mixing medium temperature modifying agent and matrix asphalt and water that step 1) obtains
DEG C, stir；
4) at 90 DEG C, when mixing the viscosity of the modification mid temperature pitch of generation and being less than 3Pas, asphalt production terminates.
Different component formulas, using above-mentioned same production stage, it is as follows that it produces the performance of obtained mid temperature pitch
Table 1：The performance indications of the mid temperature pitch of different component：
Table 1：The performance indications of the mid temperature pitch of different component
5 DEG C of ductilities that the high solids content for producing to obtain according to this method is modified mid temperature pitch evaporated residue are no less than
56.1cm；The softening point of evaporated residue is 85~97 DEG C；The needle penetration of evaporated residue is 58~66 (0.1mm).The pitch
The drop temperature of manufactured compound is no more than 120 DEG C.Other technologies index meets industry specifications《Asphalt highway
Construction technique normalizing》(JTG F40-2004) and Hubei Province's local regulation《High solids content emulsifying mid temperature pitch pavement technique is advised
Journey》(DB42/T1045-2015).
Compared with existing No. 70 conventional A level pitches, the high solids content that the present invention produces is modified producing for mid temperature pitch
The temperature requirement of links during use substantially reduces.
The construction temperature such as table 2 below of common mid temperature pitch compound：The construction temperature scope institute of mid temperature pitch compound
Show, temperature unit is DEG C：
Table 2：The construction temperature scope of mid temperature pitch compound
The high solids content is modified in the component of mid temperature pitch, and the height of matrix pitch content influences the uniform of product pitch
Property, when matrix pitch content is high, pitch mobility viscosity is bigger, and asphalt construction temperature is higher.Certainly, high content matrix
The cost of pitch is also higher.
It is more to add the amount of medium temperature modifying agent, the ductility of product pitch is bigger, softening point is higher；But when softening point height
When to a certain extent, product pitch is easily layered, and influences pitch mixing uniformity.
The viscosity that the amount of the water of addition gets over multi-product pitch is smaller, and asphalt construction workability is better；But water
Dosage is bigger, and the performance of pitch is lower, while influences the water stability of asphalt.
The difference of plain asphalt and modified pitch is mainly the performance of the difference influence power pitch of amount of modifier in pitch,
The more ductilities of modifying agent, softening point, needle penetration are relatively good.
The high solids content produced using the present invention is modified mid temperature pitch product, mainly changes drip using medium temperature modifying agent
Hydrophily and oil loving distribution, arrangement in green grass or young crops, do not change asphaltene molecule structure, and the temperature of modified asphaltic products only needs
Want 85 DEG C or so.Existing conventional modified pitch is to add additive in pitch, changes asphaltene molecule structure, its manufactured pitch
Mixture construction temperature needs to reach 170 DEG C；Therefore need to consume mass energy, and produce disposal of pollutants, it is not easy to maintain.It can be seen that
The obvious more energy-conserving and environment-protective of pitch that the present invention produces, and it is more easy to maintain.
The drop temperature of the compound of existing modified pitch usually requires to reach 165 DEG C or so.Pitch at this temperature
Simultaneously also with the toxic gas of secondary aging, side by side amplification quantity.The high solids content produced using the present invention is modified mid temperature pitch
Compound drop temperature be no more than 120 DEG C.30~60 DEG C of asphalt drop temperature can be reduced compared with prior art, subtracted
The aging of pitch, energy-conserving and environment-protective are lacked.Meanwhile various volatilizations of relatively low drop temperature when can considerably reduce asphalt
Property material generation, reduce air pollution, reduce the actual bodily harm to workmen.
The construction temperature scope that the high solids content produced using the present invention is modified mid temperature pitch is wider, can be not less than 0 DEG C
Weather conditions under construct.And prior art modified pitch construction temperature cannot be below 10 DEG C of constructions, meet under low temperature environment
Road maintenance demand.
Claims (4)
1. a kind of high solids content is modified mid temperature pitch, it is characterised in that：It is made up of following components by mass fraction：75~82 parts of bases
Matter pitch, 3~7 parts of medium temperature modifying agent, 11~22 parts of water；
Described medium temperature modifying agent is made up of following components by mass fraction：
5~10 part of 18/16 tertiary amine；
5~12 parts of cationic additives, described cationic additive are selected from the chloro- 2- hydroxypropyls-trimethyl ammonium chlorides of 3- and chlorine
Change trimethyldodecane base ammonium；
1~5 part of methanol；
40~50 parts of emulsifying agent, described emulsifying agent are selected from s-B-S, butadiene-styrene rubber, polyethylene, third
Alkene nitrile-BS, high polymer polypropylene and polystyrene；
1~3 part of calcium chloride；
5~20 parts of deionized waters.
2. high solids content according to claim 1 is modified mid temperature pitch, it is characterised in that：Described matrix pitch is matrix
Asphalt.
3. high solids content according to claim 1 is modified mid temperature pitch, it is characterised in that：The high solids content is modified medium temperature drip
5 DEG C of ductilities of blue or green pitch evaporated residue are no less than 56.1cm；The softening point of evaporated residue is 85~97 DEG C；Evaporation residual
The needle penetration of thing is 5.8~6.6mm.
4. any one of the claims 1~3 high solids content is modified the preparation method of mid temperature pitch, it is characterised in that：The party
Method comprises the following steps：
1) component than water of medium temperature modifying agent is dissolved in the deionized water no less than 60 DEG C, and be sufficiently mixed
It is even；
2) matrix asphalt is heated to more than 150 DEG C；
3) 75 DEG C~95 DEG C are maintained the temperature at after mixing medium temperature modifying agent and matrix asphalt and water that step 1) obtains, is stirred
Mix uniformly；
4) at 90 DEG C, when mixing the viscosity of the modification mid temperature pitch of generation and being less than 3Pas, asphalt production terminates.
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| CN201610079204.8A CN105504846B (en) | 2016-02-04 | 2016-02-04 | High solids content is modified mid temperature pitch and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408952A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Warmly-mixed modified emulsified asphalt as well as preparation method and application thereof |
| CN105295068A (en) * | 2015-10-30 | 2016-02-03 | 华烁科技股份有限公司 | High-cation-degree asphalt emulsifier and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101185505B1 (en) * | 2010-05-27 | 2012-09-24 | 주식회사 뉴페이브 | Composition of Warm Mix Asphalt Additives Containing Softening, Foaming and Lubricating Agents |
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- 2016-02-04 CN CN201610079204.8A patent/CN105504846B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408952A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Warmly-mixed modified emulsified asphalt as well as preparation method and application thereof |
| CN105295068A (en) * | 2015-10-30 | 2016-02-03 | 华烁科技股份有限公司 | High-cation-degree asphalt emulsifier and application thereof |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Yong Inventor after: Xiao Mingzhao Inventor after: Lu Ji Inventor after: Huang Kui Inventor after: Wu Dan Inventor after: Chen Shaoping Inventor after: Peng Lei Inventor before: Chen Shaoping |
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Effective date of registration: 20170726 Address after: 430056 Hubei city of Wuhan Province Economic and Technological Development Zone Chunxiao Road No. 6 Applicant after: Wuhan Municipal Construction Group Co., Ltd. Applicant after: WUHAN CHENGSHITONG ENVIRONMENT PROTECTION PITCH ENGINEERING CO., LTD. Address before: 430012, room 6, building 01, building 1-01, Optics Valley core, 111 Optics Valley Road, East Lake New Technology Development Zone, Hubei, Wuhan, China Applicant before: WUHAN CHENGSHITONG ENVIRONMENT PROTECTION PITCH ENGINEERING CO., LTD. |
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