CN108504118A - RAP pitches softening fusion regenerative agent and its application - Google Patents
RAP pitches softening fusion regenerative agent and its application Download PDFInfo
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- CN108504118A CN108504118A CN201810444289.4A CN201810444289A CN108504118A CN 108504118 A CN108504118 A CN 108504118A CN 201810444289 A CN201810444289 A CN 201810444289A CN 108504118 A CN108504118 A CN 108504118A
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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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Abstract
The invention discloses a kind of RAP pitches to soften fusion regenerative agent and its application, is indicated with parts by weight, and the softening fusion regenerative agent includes 40~60 parts of softening agent, 40~60 parts of medium fusion agent, 5~10 parts of surfactant, 5~10 parts of bleeding agent.By using the regenerative agent, Asphalt emulsion content can be reduced, intensity, high-temperature stability, low-temperature cracking-resistance of cold regeneration mix etc. is improved and integrates pavement performance, and save production cost.
Description
Technical field
The present invention relates to emulsified asphalt cold recycling technology field, more particularly to a kind of RAP pitches softening fusion regenerative agent and
It is applied.
Background technology
Traditional cold recycled asphalt mixture is that RAP is used as " dark stone ", is carrying out Mix Ratio Test and construction
When, do not consider original bitumen content and its performance in RAP materials, when production gathers materials it with emulsified asphalt, newly, additive with
And water mixes and stirs, the practical bitumen aggregate ratio of obtained cold recycled asphalt mixture is higher, and there are new Bituminous concrete surface merge it is insufficient
Problem is insufficient so as to cause the water stability deficiency of regenerating mixture, low strength, high-temperature stability.
Invention content
It is old by softening, dissolving the surfaces RAP it is an object of the invention to develop a kind of RAP pitches softening fusion regenerative agent
Pitch, while the Bituminous concrete surface in RAP being made mutually to be merged with new pitch in emulsified asphalt, and old aged asphalt is regenerated,
Uniform and stable new pitch interface is formed at mineral aggregate interface, to improve the intergranular cohesive force of cold regeneration mix and cold renewal
The intensity of mixture.
Soften the application for merging regenerative agent another object of the present invention is to provide a kind of above-mentioned RAP pitches, by using
The regenerative agent reduces Asphalt emulsion content, and it is comprehensive to improve intensity, high-temperature stability, low-temperature cracking-resistance of cold regeneration mix etc.
Pavement performance, and save production cost.
To solve the above problems, the technical solution adopted by the present invention is：
The present invention provides a kind of RAP pitches softening fusion regenerative agent, is indicated with parts by weight, regenerative agent master is merged in the softening
Will be 40~60 parts by softening agent, 40~60 parts of medium fusion agent, 5~10 parts of surfactant, 5~10 parts of bleeding agent.
The present invention further comprises following optimal technical scheme：
In preferred scheme, the softening agent is dichloromethane；
In preferred scheme, the medium fusion agent is absolute ethyl alcohol；
In preferred scheme, the surfactant is hexadecyltrimethylammonium chloride or octadecyl trimethyl chlorination
At least one of ammonium；
In preferred scheme, the bleeding agent is turpentine oil.
In the present invention, " RAP " is the abbreviation of " recycling asphalt pavement material ".
The regenerative agent, which is applied, is：It is prepared under RAP pitches softening fusion regenerative agent each component room temperature, each component in process for preparation
Addition without sequencing.
In use, being directly added into external adding water when cold regeneration mix production, add according to the 0.5~2% of RAP total amounts
Add.
The advantage of the invention is that：
1, the present invention can soften the surfaces cold renewal RAP Bituminous concrete surface, and Bituminous concrete surface is made to participate in ratio of bitumen to aggregate, reduce emulsified asphalt
Dosage saves production cost；
2, the present invention can merge new pitch in emulsified asphalt, and new Bituminous concrete surface is made fully to merge, and be formed uniform and stable new
Asphalt interface, improve the cohesive force of cold recycled asphalt mixture, and then improve the intensity of cold regeneration mix, high-temperature stable
Property, the comprehensive pavement performance such as low-temperature cracking-resistance, cleavage strength reaches 1Mpa or more, standard dynamic stability reach 3000 times/mm with
On, meet the requirement of bituminous pavement top technology.
Specific implementation mode
The present invention is further explained with reference to embodiments, but is not intended to limit present disclosure.
1, by cold renewal RAP according to《Highway engineering pitch and Asphalt Mixture Experiment regulation》In (JTG E20-2011)
The T0726-2011 method (Abson method) of pitch " from asphalt recycle " recycling aged asphalts, determine bitumen content and
Technical indicator, then the asphalt blocks of several 10g sizes rules are made by pitch is recycled, it is put into 20mL softening fusion regenerative agents, it is logical
The volatilization dissolubility test of embodiment 1~11 is crossed, observation 1h, 2h, 4h, the volatilization situation and asphalt blocks of regenerative agent are merged in softening for 24 hours
Dissolved state, refer to table 1.
The softening fusion regenerative agent volatilization dissolubility test of table 1
Wherein percentage represents volatilization and dissolution degree, and 0% represents：It is non-volatile, undissolved；100% represents：It waves completely
It sends out, be completely dissolved.
Following surfactants are at least one in hexadecyltrimethylammonium chloride or octadecyltrimethylammonium chloride
Kind；Wherein A：85%~90%+ of absolute ethyl alcohol surfactants 5%~10%；
B：Carbon tetrachloride 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
C：Epoxidized soybean oil 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
D：Normal heptane 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
E：Ethyl acetate 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
F：Petroleum ether 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
G：Turpentine oil 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
H：Dichloromethane 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
I：Ammonium hydroxide 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
J：Paraxylene 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
K：Ether 40%~60%+, 40%~60%+ of absolute ethyl alcohol surfactants 5%~10%；
Preferable to softening syncretizing effect according to volatilization dissolubility test, solvent volatilizees less B, D, E, F, G, H, I, J, K
Formula continues permeability test.
2, by cold renewal RAP recycling pitch according to《Highway engineering pitch and Asphalt Mixture Experiment regulation》(JTGE20-
2011) T0604-2011 " asphalt penetration test " method prepares needle penetration die trial in, after 1ml softening fusion agents are added, passes through
Examples 1 to 9 permeability test measures the penetration index and needle penetration difference of 0h, 4h, the regenerative agent of softening fusion for 24 hours, refers to table
2。
The softening fusion regenerative agent permeability test of table 2
According to permeability test, softening fusion agent B, D, G, H, J have preferable infiltration bating effect.Continue to melt softening
The physical and chemical performance and society, economy for closing regenerative agent are compared, and refer to table 3.
The physical and chemical performance and society, economy of the softening fusion regenerative agent of table 3
| Flash-point/DEG C | Explosion limit | It is water-soluble | Environmental contamination | Price/ten thousand/ton | |
| Carbon tetrachloride | -19 | Extinguishing chemical | Slightly soluble | Have | 0.35-0.38 |
| Normal heptane | 1 | 1-7% | It is insoluble | Have | 1-1.4 |
| Turpentine oil | 30 | 0.8% | It is insoluble | Nothing | 1.3-1.5 |
| Dichloromethane | 40 | Extinguishing chemical | It is insoluble | It is micro- | 0.45-0.50 |
| Paraxylene | 25 | 1-7% | It is insoluble | Have | 0.9-1.2 |
| Surfactant | 100 | Nothing | It dissolves each other | Nothing | 1.5-2.0 |
| Ethyl alcohol | 13 | 3.5-18.0% | It dissolves each other | Nothing | 0.55-0.80 |
According to physical and chemical performance and society, economic analysis, softening fusion regenerative agent B, D, J are unsatisfactory for social environment and want
It asks, cold recycled asphalt mixture experiment is carried out to tri- groups of softening fusion regenerative agents of G, H, G+H below.
The cold renewal RAP that crushing and screening recycles is divided into 0~8mm, 8~15mm, 15~25mm third gear, 60 DEG C of baking oven drying
It is sieved afterwards for 24 hours, according to《Asphalt highway regeneration techniques specification》" emulsified asphalt cold renewal is mixed in (JTG F41-2008)
Close material engineering design grading envelope ", grain formula grading in selection determines the mixture proportion for the 9.5~19mm that newly gathers materials, will account for cold renewal
1.5% strength grade of mixture quality percentage is 42.5 portland cement, 4%~6% drinkable water, 0.5~2%
RAP pitches softening fusion regenerative agent, 2%~4% independent development cationic cold renewal emulsified asphalt, through in the cloud of Hunan again
The double-deck multistep of raw Science and Technology Co., Ltd. independent research mixes and stirs technique, according still further to《Highway engineering pitch and asphalt
Testing regulations》T0709-2011 methods prepare marshal piece in (JTG E20-2011), and positive and negative respectively hits 50 times real, 60 DEG C of bakings
After cage breeding life is no less than 40h, then positive and negative is respectively hit 25 times in fact, 12h demouldings is no less than through room temperature cooling, according to T0711-2011
" experiment of asphalt theoretical maximum specific density ", T0708-2011 " compacting asphalt mixture density experiment (volumetric method) ",
It is anti-to survey its theoretical maximum specific density, bulk density, voidage, splitting by T0716-2011 " Indirect Tensile Tests of Asphalt Mixtures "
The asphalts index such as tensile strength refers to table 4,5,6.
The softening fusion regenerative agent mixture proportion table of table 4
| Softening fusion regenerative agent | Emulsified asphalt volume (%) | Softening fusion regenerative agent (%) |
| Blank | 4 | 0 |
| G | 2-3 | 0.5-2 |
| H | 2-3 | 0.5-2 |
| G+H | 2-3 | (0.25-1):(0.25-1) |
The softening fusion regenerative agent cold recycled asphalt mixture experiment of table 5
6 present invention softening fusion regenerative agent cold recycled asphalt mixture index of table
By table 4,5,6 it is found that cold renewal RAP of the present invention softening fusion regenerative agent (G+H) can improve to a greater extent it is cold
The pavement performance of reclaimed asphalt mixture reduces cold renewal Asphalt emulsion content, cold recycled asphalt mixture pavement performance is made to reach
To the requirement of bituminous pavement top technology.
Claims (7)
1.RAP pitches softening fusion regenerative agent, which is characterized in that indicated with parts by weight, the softening fusion regenerative agent includes soft
40~60 parts of agent, 40~60 parts of medium fusion agent, 5~10 parts of surfactant, 5~10 parts of bleeding agent.
2. RAP pitches softening fusion regenerative agent according to claim 1, which is characterized in that the softening agent is dichloromethane
Alkane.
3. RAP pitches according to claim 1 or 2 softening fusion regenerative agent, which is characterized in that the medium fusion agent is
Absolute ethyl alcohol.
4. RAP pitches softening fusion regenerative agent according to claim 1, which is characterized in that the surfactant is ten
At least one of six alkyl trimethyl ammonium chlorides or octadecyltrimethylammonium chloride.
5. RAP pitches softening fusion regenerative agent according to claim 1 or 4, which is characterized in that the bleeding agent is turpentine
Oil.
6. the application of claim 1-5 any one of them RAP pitches softening fusion regenerative agent, which is characterized in that the regeneration
Agent is added in RAP, accounts for the 0.5%-2% of RAP gross masses.
7. application according to claim 6, which is characterized in that cold renewal is added in the RAP pitches softening fusion regenerative agent
In external adding water when mixture produces.
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|---|---|---|---|
| CN201810444289.4A CN108504118B (en) | 2018-05-10 | 2018-05-10 | RAP asphalt softening fusion regenerant and application thereof |
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| CN108504118B CN108504118B (en) | 2020-06-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721286A (en) * | 2019-01-19 | 2019-05-07 | 江苏盛达飞建筑材料有限公司 | A kind of heat-resisting Recycled Asphalt Pavement and preparation method thereof |
| CN111019369A (en) * | 2019-12-25 | 2020-04-17 | 重庆交通大学 | Asphalt penetrant and preparation method and application thereof |
| CN115073061A (en) * | 2022-05-12 | 2022-09-20 | 福建农林大学 | Regenerated asphalt mixture and preparation method thereof |
| CN116693242A (en) * | 2023-07-25 | 2023-09-05 | 湖南云中再生科技股份有限公司 | Preparation method of cold-recycled asphalt mixture, cold-recycled asphalt mixture and application |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721286A (en) * | 2019-01-19 | 2019-05-07 | 江苏盛达飞建筑材料有限公司 | A kind of heat-resisting Recycled Asphalt Pavement and preparation method thereof |
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| CN111019369A (en) * | 2019-12-25 | 2020-04-17 | 重庆交通大学 | Asphalt penetrant and preparation method and application thereof |
| CN115073061A (en) * | 2022-05-12 | 2022-09-20 | 福建农林大学 | Regenerated asphalt mixture and preparation method thereof |
| CN115073061B (en) * | 2022-05-12 | 2023-02-10 | 福建农林大学 | Regenerated asphalt mixture and preparation method thereof |
| CN116693242A (en) * | 2023-07-25 | 2023-09-05 | 湖南云中再生科技股份有限公司 | Preparation method of cold-recycled asphalt mixture, cold-recycled asphalt mixture and application |
| CN116693242B (en) * | 2023-07-25 | 2023-11-07 | 湖南云中再生科技股份有限公司 | Preparation method of cold-recycled asphalt mixture, cold-recycled asphalt mixture and application |
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