CN109897392A - A method of improving rubber asphalt construction workability using bio oil - Google Patents
A method of improving rubber asphalt construction workability using bio oil Download PDFInfo
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- CN109897392A CN109897392A CN201910217537.6A CN201910217537A CN109897392A CN 109897392 A CN109897392 A CN 109897392A CN 201910217537 A CN201910217537 A CN 201910217537A CN 109897392 A CN109897392 A CN 109897392A
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- rubber asphalt
- rubber
- construction workability
- heavy oil
- wet process
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Abstract
The invention discloses a kind of method for improving rubber asphalt construction workability using bio oil, this method adds warm mix heavy oil modifying agent during wet process rubber asphalt produces, which is coking of coal heavy oil.Method of the invention can perfectly solve the problems, such as conventional wet rubber asphalt, and workability is bad in the construction process, and reduces the generation of wet process rubber asphalt segregation phenomenon to a certain extent.Method proposed by the present invention is simple, in wet process rubber asphalt production process, by warm mix additive for heavy oil slowly, be continually added to uniform mixing in wet process rubber asphalt, the temperature of mixing and stirring of rubber asphalt in use is substantially reduced, construction workability is obviously improved, wet process rubber asphalt pavement performance is remained to greatest extent simultaneously, and improves its storage stability to a certain extent.
Description
Technical field
The present invention relates to the rubber powder modified technologies of pavement asphalt and construction workability improving technology field, and in particular to a kind of
Improve the method for rubber asphalt construction workability using bio oil.
Background technique
Due to huge volume of traffic demand, there is a large amount of rubber tyre to be collected every year and stack processing.However, this is not only
It will cause the wasting of resources, while may also can cause fire because of dieseling.Therefore it will pass through secondary operation rubber tyre
Obtained rubber powder particles had once been considered as the modifying agent of effective bitumen for road use, and were applied to field of road.
Wet process rubber asphalt is to mix a certain amount of rubber powder with pitch, carries out reaction at high temperature and generates tool
There is the mixture of certain property.Compared with traditional asphalt cementitious matter, wet process rubber asphalt has many good qualities, such as high temperature Rut resistance
Ability significantly improves, and pavement noise is substantially reduced, and service life is obviously prolonged.But the popularization of wet process rubber asphalt but by
Itself poor construction workability and storage stability limitation.
Caused by the construction workability difference of wet process rubber asphalt is its biggish viscosity.Warm-mixing rubber-asphalt is considered as solution
A kind of certainly such energy-saving and environment-friendly technology.Warm-mixing agent can be divided into three classes, respectively chemical addition agent, be had according to the mechanism of action
Machine additive and foaming additive.Evotherm-DAT is built as one of common liquid chemical warm-mixing agent according to producer
The dosage of the 5wt% of view, which can reduce, to be mixed and stirred temperature and is up to 55 DEG C.However, the use of warm-mixing agent will lead to the increase of operating expenses
And the reduction of warm-mixing rubber-asphalt pavement performance.
The non-traditional oily resources reserve obtained based on dry distillation of coal process mainly includes light oil, heavy oil and pitch.At these
In the deposit of oily resource, coking of coal heavy oil plays indispensable role in many technical fields.Also, consider non-biography
Energy market of the oily resource of uniting in occupation of 70%, more and more scientific research personnel are dedicated to for such resource being applied to road neck
Domain.Compared to traditional warm-mixing agent, coking of coal heavy oil selected by the present invention has from a wealth of sources, and project cost is low and can be maximum
The pavement performance of limit reservation wet process rubber asphalt.
Summary of the invention
To solve problems of the prior art, improve rubber drip using bio oil the object of the present invention is to provide a kind of
The method of green construction workability, this method be in wet process rubber asphalt production process, wet process rubber asphalt slowly, persistently
Add warm mix additive for heavy oil in ground.
The purpose of the present invention is achieved through the following technical solutions.
A method of improving rubber asphalt construction workability using bio oil, comprising the following steps:
(1) matrix pitch is heated to mixing and stirring temperature；
(2) mechanical stirring in heated bitumen obtained by rubber powder particles addition step (1) is uniform, heat preservation mixes and stirs temperature to specified
Degree, starts to stir using high-speed shearing machine；
(3) after step (2) starts stirring, warm mix heavy oil modifying agent slowly and is equably added to step (2) institute
It obtains and is mixed and stirred in wet process rubber.
Preferably, the raw material of step (2) the rubber powder particles is waste tire, by normal temperature crushing up, freezing, often
The methods of warm chemical method is process.
Preferably, step (2) the rubber powder particles are the rubber powder of desulfurization, meeting during construction at high temperature containing sulphur rubber
It decomposes, causes environmental pollution, while will affect the health of worker.Such devulcanized rubber is considered based on environmental protection and health
Environmentally friendly product.The rubber powder that the present invention uses it is cheap, be easy to get, it might even be possible to use the useless of various tires
Material, turns waste into wealth, greatlys save cost.
Preferably, step (2) the rubber powder particles and matrix pitch mechanical stirring time are 3~5min.
Preferably, step (2) the rubber powder particles volume is the 16%- of rubber powder particles and matrix pitch gross mass
20%.
Preferably, it is 135~160 DEG C that the rubber powder and matrix pitch, which mix and stir temperature, and pitch has good stream at this time
Dynamic property.
Preferably, step (3) the warm mix heavy oil modifying agent is the medium temperature coking of coal produced at 900~1000 DEG C
Heavy oil is the viscous liquid of dark brown.
Preferably, step (3) the warm mix heavy oil modifying agent density (about 1.07) is greater than matrix pitch (about 1.04),
Mainly comprising chemical substances such as phenol, cresols and dimethlbenzenes.
Preferably, step (3) the warm mix heavy oil modifying agent be equably added to the time used in wet process rubber be 8~
12min。
Preferably, the temperature of mixing and stirring of step (3) the warm mix heavy oil modifying agent and wet process rubber is 155-165 DEG C.
Preferably, the mixing time of step (3) the warm mix heavy oil modifying agent and wet process rubber is 0.8~1.2h.
Preferably, step (3) the warm mix heavy oil content of modifier be rubber powder particles and matrix pitch gross mass 4~
6%.
The present invention significantly reduce rubber asphalt in use mix and stir temperature, construction workability has obtained significantly
It is promoted, while remaining wet process rubber asphalt pavement performance to greatest extent, and improve its storage stability to a certain extent.
Compared with prior art, the present invention has the following technical effect that
A kind of functional effect of method improving rubber asphalt construction workability using bio oil of the invention is good, pollutes
It is small, at low cost, and effectively realize energy-saving and emission-reduction.Warm mix heavy oil modifying agent slowly, is equably added in use process
It is mixed and stirred to having been heated in the wet process rubber asphalt for mixing and stirring temperature, gives full play to the whole of warm mix heavy oil modifying agent and make
With the storage stability that the wet process rubber asphalt thus prepared has good construction workability and improves to a certain degree.
Specific embodiment
In order to be further understood that summary of the invention of the invention, the present invention is elaborated below in conjunction with specific embodiment.
The testing standard being applied to is as follows:
(1) needle penetration:
U.S. norm: ASTM D5Standard Test Method for Penetration of Bituminous
Materials (translation asphalt material needle penetration Standard test method)；
Chinese regulations: JTG E20-2011T0604 Asphalt Penetration experiment
(2) softening point:
U.S. norm: ASTM D36.Standard Test Method for Softening Point of Bitumen
(Ring-and-Ball Apparatus) (translation asphalt softening point Standard test method-ring and ball method)
Chinese regulations: JTG E20-2011T0606 asphalt softening point tests (ring and ball method)
(3) viscosity:
U.S. norm: AASHTO T316.Standard Method of Test for Viscosity
Determination of Asphalt Binder Using Rotational Viscometer (translation rotational viscometer
Measure the standard method of bituminous cements viscosity)
Chinese regulations: JTG E20-2011T0625 pitch viscosity tests (Bu Luoke Philid viscometer method)
(4) high, medium temperature critical-temperature:
U.S. norm: AASHTO M320.Standard Specification for Performance-Graded
Asphalt Binder (translation performance of asphalt mixture is classified (PG classification) madam's standard criterion).
(5) non-recoverable creep compliance
U.S. norm: AASHTO M19-10.Performance-Graded Asphalt Binder Using
(the multiple creep under variable stress of translation restores to test cementing to pitch Multiple Stress Creep Recovery (MSCR) Test
Material classification).
(6) LAS fatigue life
U.S. norm: AASHTO TP101.Standard Method of Test for Estimating Damage
Tolerance of Asphalt Binders Using the Linear Amplitude Sweep (translation linear amplitude
The Standard test method of scanning simulation bituminous cements damage limit).
(7) modulus and m value:
U.S. norm: AASHTO T313.Standard Method of Test for Determining the
Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer
(BBR) (standard test method (BBR) that translation measures pitch binder bending creep rigidity with bending mechanical properties)
Chinese regulations: JTG E20-2011 T0627 pitch bending creep stiffness tests (bending mechanical properties)
Comparative example 1:
A kind of processing method of conventional wet rubber asphalt is mixed and stirred by adding rubber powder into matrix pitch.
The pitch is matrix pitch.The quality of matrix pitch is 1000g, and the quality of rubber powder is 220g, and rubber powder is
Devulcanized rubber is black, particulate matter under room temperature.
Improve wet process rubber asphalt storage stability process, comprising the following steps:
(1) pitch is heated to mixing and stirring 135 DEG C of temperature；
(2) rubber powder 220g is added to uniform stirring 3min in the matrix pitch of liquid, is reheated to specified mix
And temperature；
(3) under high-speed shearing emulsion machine effect, temperature is being mixed and stirred to the mixture high speed shear of rubber powder and pitch.
The revolving speed of high-speed shearing emulsion machine is 10000RPM, and mixing and stirring temperature is 176 DEG C, and mixing time 1h enables rubber powder
It is enough adequately to be reacted under the action of high speed shear.Wet process rubber asphalt after preparation is black at room temperature, sticky gluey solid
Body.
The performance of the rubber powder modified asphalt of this comparative example preparation is as shown in table 1, and storage stability performance is as shown in table 2.
Comparative example 2:
A kind of method that tradition improves construction workability, by adding rubber powder and liquid state warm mixing agent into matrix pitch
Evotherm-DAT is mixed and stirred.
The pitch is matrix pitch.The quality of matrix pitch is 1000g, and the quality of rubber powder is 220g, Evotherm-
DAT is 61g, and it is black, particulate matter under room temperature that rubber powder, which is devulcanized rubber,；Evotherm-DAT is amber thick liquid.
Improve wet process rubber asphalt storage stability process, comprising the following steps:
(1) pitch is heated to mixing and stirring 135 DEG C of temperature；
(2) rubber powder 220g is added to uniform stirring 3min in the matrix pitch of liquid, is reheated to specified mix
And temperature；
(3) at a temperature of specified mix and stir, high-speed shearing emulsion machine is opened, slowly and is homogeneously added into 10min
Evotherm-DAT。
The revolving speed of high-speed shearing emulsion machine be 10000RPM, mix and stir temperature be 160 DEG C, mixing time 1h, make rubber powder and
Warm-mixing agent can adequately react under the action of high speed shear.Wetting rubber asphalt after preparation is black at room temperature
Color, sticky colloidal solid.
Embodiment 1:
A method of improving rubber asphalt construction workability using bio oil, by adding rubber powder into matrix pitch
It is mixed and stirred with warm mix heavy oil modifying agent.
The pitch is matrix pitch.The quality of matrix pitch is 1000g, and the quality of rubber powder is 220g, coking of coal weight
Oil is 61g, and it is black, particulate matter under room temperature that rubber powder, which is devulcanized rubber,；Coking of coal heavy oil is dark brown thick liquid.
Improve wet process rubber asphalt storage stability process, comprising the following steps:
(1) pitch is heated to mixing and stirring 135 DEG C of temperature；
(2) rubber powder 220g is added to uniform stirring 3min in the matrix pitch of liquid, is reheated to specified mix
And temperature；
(3) at a temperature of specified mix and stir, high-speed shearing emulsion machine is opened, slowly and is homogeneously added into coal tar in 10min
Change heavy oil.
The revolving speed of high-speed shearing emulsion machine be 10000RPM, mix and stir temperature be 160 DEG C, mixing time 1h, make rubber powder and
Warm-mixing agent can adequately react under the action of high speed shear.Wetting rubber asphalt after preparation is black at room temperature
Color, sticky colloidal solid.
The performance of rubber powder modified asphalt manufactured in the present embodiment is as shown in table 1, (the Brooker rotation of construction workability evaluation index
Turn viscosity) as shown in table 2.
Table 1
| Temperature (DEG C) | 135 | 160 | 176 |
| Matrix pitch | 2850 | N/A | N/A |
| Comparative example 1 | 10550 | 3488 | 2503 |
| Comparative example 2 | 6175 | 2451 | 2011 |
| Embodiment 1 | 3465 | 1430 | 1005 |
Table 2
As it can be seen from table 1 warm mix heavy oil modifying agent is substantially reduced viscosity for wet process rubber asphalt.Consider
It arrives, viscosity is related with construction temperature, and viscosity is lower at identical temperature, and required construction temperature is lower, thus construction workability
Better.Therefore, warm mix heavy oil modifying agent can effectively improve the construction workability of wet process rubber asphalt.Simultaneously with comparative example 2
Comparison to can be seen that the method in the present invention also more prominent than the viscosity reducing effect of traditional warm mix technology, and source is wide, engineering is made
Valence is low.
As shown in table 2, by observe comparative example (pure wet process rubber asphalt) result it can be concluded that, addition rubber powder can be comprehensive
Improve the performance of matrix pitch, including (high temperature critical-temperature & is or not conventional road surface index (needle penetration & softening point), rutting resistance
Can restore creep compliance), anti-fatigue ability (medium temperature Lin Jiewendu &LAS fatigue life) and cryogenic property (BBR).By right
Than it can be concluded that, addition warm mix heavy oil modifying agent can reduce the pavement performance of rubber asphalt to a certain extent, but whole
Improvement still will be apparently higher than matrix pitch.Rutting resistance and fatigue life after aging especially therein, are to want
Better than comparative example.The reducing effect of cryogenic property is not it is obvious that considering further that road surface asphalt material in use
Aging effect, warm mix heavy oil modifying agent are that gain is greater than the profit and loss to the improvement of wet process rubber asphalt.By with comparative example 2
Comparison can be seen that compared with traditional result, method of the invention is capable of providing more superior performance, to wet process rubber drip
Blueness improves the most perfect, the Hemorheological Indexes including traditional performance indicator, senior middle school's low temperature of performance reservation after construction workability.From
The softening point difference that the softening point difference result of table 2 can be seen that matrix pitch is 0.4 DEG C.But after being added to rubber powder, from
Analysis phenomenon is more serious, and the difference of softening point obviously becomes larger, this may be considered the density between rubber powder and matrix pitch
Segregation phenomenon caused by difference causes.And it is proposed by the present invention " a kind of to improve rubber asphalt construction workability using bio oil
Method " has obvious improvement to the improvement of storage stability, and softening point difference has been reduced to 0.1 DEG C, has been all satisfied skill
Art requirement, or even the matrix pitch than being not added with modifying agent are also much better.It is carried out simultaneously with traditional warm mix technology (comparative example 2)
Comparison is not difficult to find out that traditional technology also improves construction workability, but it is seen that it does not have effect proposed by the present invention obvious.
From the above analysis it can clearly be seen that the temperature of mixing and stirring of rubber asphalt in use is substantially reduced, construction and
Easy property is obviously improved, while remaining wet process rubber asphalt pavement performance to greatest extent, and improve to a certain extent
Its storage stability.
Claims (10)
1. a kind of method for improving rubber asphalt construction workability using bio oil, which comprises the following steps:
(1) matrix pitch is heated to mixing and stirring temperature；
(2) mechanical stirring in heated bitumen obtained by rubber powder particles addition step (1) is uniform, heat preservation mixes and stirs temperature to specified, benefit
Start to stir with high-speed shearing machine；
(3) after step (2) starts stirring, warm mix heavy oil modifying agent slowly and is equably added to wet obtained by step (2)
It is mixed and stirred in method rubber.
2. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
The raw material of step (2) the rubber powder particles is waste tire.
3. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
Step (2) the rubber powder particles are the rubber powder of desulfurization.
4. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
Step (2) the rubber powder particles and matrix pitch mechanical stirring time are 3 ~ 5min.
5. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
Step (2) the rubber powder particles volume is the 16%-20% of rubber powder particles and matrix pitch gross mass.
6. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
Step (3) the warm mix heavy oil modifying agent is the medium temperature coking of coal heavy oil produced at 900 ~ 1000 DEG C.
7. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
Step (3) the warm mix heavy oil modifying agent is added to the time used in wet process rubber equably as 8 ~ 12min.
8. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
The temperature of mixing and stirring of step (3) the warm mix heavy oil modifying agent and wet process rubber is 155-165 DEG C.
9. a kind of method for improving rubber asphalt construction workability using bio oil as described in claim 1, which is characterized in that
The mixing time of step (3) the warm mix heavy oil modifying agent and wet process rubber is 0.8 ~ 1.2h.
10. a kind of method for being improved rubber asphalt construction workability using bio oil as described in claim 1, feature are existed
In step (3) the warm mix heavy oil content of modifier is 4 ~ 6 % of rubber powder particles and matrix pitch gross mass.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115746574A (en) * | 2022-11-07 | 2023-03-07 | 山西省交通科技研发有限公司 | Biological oil-based rubber asphalt warm mixing agent and application method thereof |
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| CN101054451A (en) * | 2007-05-22 | 2007-10-17 | 杨林江 | Artificial asphalt for pavement and preparation method thereof |
| KR100781608B1 (en) * | 2006-07-20 | 2007-12-03 | 주식회사 뉴페이브 | Recylced asphalt concrete comprising polymer modifier for pavement and manufacturing method thereof |
| CN104212188A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Casting type mixture asphalt material and preparation method thereof |
| CN106810888A (en) * | 2017-01-01 | 2017-06-09 | 山西省交通科学研究院 | A kind of warm-mixing rubber-asphalt and preparation method thereof |
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2019
- 2019-03-21 CN CN201910217537.6A patent/CN109897392A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100781608B1 (en) * | 2006-07-20 | 2007-12-03 | 주식회사 뉴페이브 | Recylced asphalt concrete comprising polymer modifier for pavement and manufacturing method thereof |
| CN101054451A (en) * | 2007-05-22 | 2007-10-17 | 杨林江 | Artificial asphalt for pavement and preparation method thereof |
| CN104212188A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Casting type mixture asphalt material and preparation method thereof |
| CN106810888A (en) * | 2017-01-01 | 2017-06-09 | 山西省交通科学研究院 | A kind of warm-mixing rubber-asphalt and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115746574A (en) * | 2022-11-07 | 2023-03-07 | 山西省交通科技研发有限公司 | Biological oil-based rubber asphalt warm mixing agent and application method thereof |
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Application publication date: 20190618 |