CN109761526A - A kind of slow stick, slow viscous type modified pitch, slow viscous type modified asphalt mixture and its preparation method and application - Google Patents
A kind of slow stick, slow viscous type modified pitch, slow viscous type modified asphalt mixture and its preparation method and application Download PDFInfo
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Abstract
The present invention relates to a kind of slow sticks, slow viscous type modified pitch, slow viscous type modified asphalt mixture and its preparation method and application.Mulit-hydroxy fatty acid ester and triethylamine: being uniformly mixed with n,N-Dimethylformamide, acryloyl chloride and/or lauroyl chloride be then added dropwise under condition of ice bath by the preparation method of slow stick, is further continued for reacting 1~3h under condition of ice bath, is obtained reaction product solution；By reaction product solution by suction filtration and dry, obtained slow stick.Slow viscous type modified pitch is stirred by the matrix pitch stick that eases up.The preparation method of slow viscous type modified asphalt mixture is that the slow viscous type modified pitch for being heated to molten condition is added into the graded broken stone of heating and stirs evenly, and obtains mixture, adds miberal powder and stir evenly, the asphalt is made.The slow viscous type modified pitch and its mixture of the method for the present invention preparation, can not only reduce the viscosity of pitch when mixing and stirring, and can guarantee the complete recovery of asphalt viscosity after construction.
Description
Technical field
The invention belongs to modified pitch preparation technical field more particularly to a kind of slow stick, slow viscous type modified pitch, delays and glue
Type modified asphalt mixture and its preparation method and application.
Background technique
Asphalt has caking property, impermeability, electrical insulating property and chemical stability etc., it has also become paves the way both at home and abroad
Main material.Therefore, the research of road asphalt is all greatly paid attention in countries in the world.In China, bituminous pavement is had become
Most important road surface form.
Currently, bituminous pavement mostly uses traditional hot-mix asphalt mixture HMA (Hot Mix Asphalt), but it is heated
Journey not only consumes mass energy, but also can give off a large amount of exhaust gas and dust, welding and damage personnel health, meanwhile,
High-temperature heating also accelerates ageing of asphalt destruction.Therefore, the Warm-Mix Bitumen Mixture WMA (Warm used at a lower temperature
Mix Asphalt) it comes into being.So-called Warm-Mix Bitumen Mixture is exactly that a kind of reconciliation pitch is used in asphalt,
This reconciliation pitch has suitable viscosity, so as to be mixed and stirred and constructed at relatively low temperature.
Currently, foreign countries when preparing Warm-Mix Bitumen Mixture, have to be had using admixture artificial zeolite, reconciliation pitch or low melting point
Machine additive and emulsified asphalt technology, have to ensure asphalt at a lower temperature it is enough mix and stir viscosity, thus
Reach and mixes and stirs target.But mixture high temperature stability performance may be reduced using artificial zeolite；Soft, hard drip in reconciliation pitch
The optimal proportion of green type and the two is difficult to determine；The adding manner of low melting point organic admixture and the difference of technique obtain pitch
Mixture performance significant difference, meanwhile, the paraffin more often added can also adversely affect pitch；In addition, outer (adding) plus agent
Uniformity also not yet solves at present.
As a kind of novel asphalt mixture, though Warm-Mix Bitumen Mixture has a good application prospect, it prepares skill
There are also raisings to be developed for art and pavement performance.Therefore, it is quite necessary to study a kind of green and environmental protection pitch and its mixing
The advantages of expecting, it made to have both HMA and WMA, and respective defect can be overcome, it is able to solve asphalt and mixes at a lower temperature
And processing performance and mixture service performance between there are problems that contradiction.
Summary of the invention
In order to solve at least one technical problem of the existing technology, the object of the present invention is to provide a kind of slow stick,
Slow viscous type modified pitch, slow viscous type modified asphalt mixture and its preparation method and application.The method of the present invention is by using one kind
Novel slow stick, which is modified pitch, is prepared for slow viscous type modified pitch and slow viscous type modified asphalt mixture, can not only drop
The viscosity of low pitch when mixing and stirring, and can guarantee the complete recovery of asphalt viscosity after construction, it will not influence the pavement performance of pitch；
Slow viscous type modified pitch prepared by the present invention is the modified pitch of a kind of green and environmental protection, and prepared mixture has both HMA
The advantages of with WMA.
To achieve the goals above, the present invention provides a kind of preparation method of slow stick, the method in first aspect
Include the following steps:
(1) mulit-hydroxy fatty acid ester and triethylamine are uniformly mixed with n,N-Dimethylformamide, obtain the first mixed liquor,
Then acryloyl chloride and/or lauroyl chloride are added dropwise in first mixed liquor under condition of ice bath, obtain the second mixed liquor；
(2) the second mixed liquor that step (1) obtains is continued at into 1~3h of reaction under condition of ice bath, it is molten obtains reaction product
Liquid；With
(3) then the reaction product solution for obtaining step (2) dries the filter cake by collected by suction filter cake, is made
Slow stick.
The present invention is provided in second aspect delays stick made from preparation method of the present invention described in first aspect.
The present invention provides a kind of preparation method of slow viscous type modified pitch in the third aspect, and the method includes walking as follows
It is rapid:
(a) matrix pitch is heated to molten condition and stirs the matrix pitch；With
(b) present invention is added while carrying out the stirring in step (a) into the matrix pitch in first aspect
Delay stick made from the preparation method so that the matrix pitch is uniformly mixed with the slow stick, obtained slow viscous type changes
Property pitch.
Preferably, the dosage of the slow stick is 0.5~3wt% of the matrix pitch dosage.
The present invention provides slow viscous type made from preparation method of the present invention described in the third aspect in fourth aspect and is modified
Pitch.
The present invention provides a kind of preparation method of slow viscous type modified asphalt mixture at the 5th aspect, the method includes
Following steps:
S1, graded broken stone is heated to 135~145 DEG C；
Preparation side of the present invention for being heated to molten condition described in the third aspect is added in S2, Xiang Suoshu graded broken stone
Delay viscous type modified pitch made from method and stir evenly, obtains mixture；With
Miberal powder is added in S3, Xiang Suoshu mixture and stirs evenly, slow viscous type modified asphalt mixture is made.
Preferably, in step s 2, the temperature of the stirring is 140~150 DEG C, and the time of the stirring is 10~25s；
In step s3, the temperature of the stirring is 140~150 DEG C, and the time of the stirring is 5~10s.
Preferably, the mass ratio of the dosage of the graded broken stone, the miberal powder and the slow viscous type modified pitch be (80~
92): (3~8): (4~6).
The present invention provides slow viscous type made from present invention preparation method described in the 5th aspect in terms of the 6th and is modified
Asphalt.
The present invention provides slow viscous type made from preparation method of the present invention described in the third aspect at the 7th aspect and is modified
Delay viscous type modified asphalt mixture in bituminous pavement made from pitch or the present invention preparation method described in the 5th aspect
Using.
The present invention at least has the following beneficial effects: compared with prior art
1, slow stick prepared by the present invention is the novel surfactant with different hydrophilic lipophilic balance value, in the present invention
Slow stick pitch can be made to have high temperature viscosity reduction, medium temperature slow viscous and the characteristic of low temperature thickening；Wherein, high temperature viscosity reduction refers to institute
Stating slow stick can be lower by the active constituent fusing point in slow stick, reduces the high temperature viscosity of pitch；Slow glue of medium temperature is logical
Too slow stick reduces pitch to the temperature sensitivity of external environment, reduces the heat loss of mixture, and asphalt viscosity is made to increase speed
Degree slows down, and pitch rate of temperature fall is slack-off, to keep construction temperature, extends effective construction time of mixture, increases work effect
Rate；Low temperature thickening is in service stage, and asphalt viscosity extends at any time and is restored.
2, slow viscous type modified pitch prepared by the present invention reduces the high temperature viscosity of pitch, so that according to viscosity-temperature curve
The temperature of mixing and stirring calculated reduces 4~7 DEG C；In terms of later period viscosity recovery, as time increases, the slow viscous drip in the present invention
Green 60 DEG C of viscosity and 135 DEG C of viscosity increase, and 135 DEG C of viscosity increase to asphalt performance without big influence at this time, and 60 DEG C viscous
Degree will improve the high-temperature behavior of asphalt；Slow viscous type modified pitch more every property compared with matrix pitch in the present invention
Can index be improved, compared with 130# asphalt performance, the response to temperature and high-temperature behavior for delaying viscous type pitch improve it is significant, low temperature and
Adhesiveness also maintains an equal level with 130# pitch, illustrates that slow viscous bitumen can adapt to the weather conditions of Tibet region, has preferable performance.
3, addition of the slow viscous type modified asphalt mixture prepared by the present invention due to delaying stick, can reach reduction and mix and stir temperature
The purpose of degree, and by the test to slow viscous type modified asphalt mixture high temperature performance and water stability, it is mixed to delay viscous bitumen
Close material all indicators are better than matrix pitch, illustrate that delaying viscous bitumen can be improved the pavement performance of mixture.
Detailed description of the invention
Fig. 1 is the viscous kelvin relation curve graph that SK pitch and SK delay viscous bitumen in embodiment 2.
Fig. 2 is that SK pitch and SK delay viscous bitumen viscosity regeneration rate figure at any time in embodiment 2.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this hair
Bright technical solution is clearly and completely described.Obviously, described embodiment is a part of the embodiments of the present invention, and
The embodiment being not all of.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work
Under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
The present invention provides a kind of preparation method of slow stick in first aspect, and described method includes following steps:
(1) mulit-hydroxy fatty acid ester and triethylamine are uniformly mixed with n,N-Dimethylformamide, obtain the first mixed liquor,
Then acryloyl chloride and/or lauroyl chloride are added dropwise in first mixed liquor under condition of ice bath, obtain the second mixed liquor；
(2) the second mixed liquor that step (1) obtains is continued under condition of ice bath and reacts 1~3h (such as 1,1.5,2,2.5
Or 3h), obtain reaction product solution；With
(3) then the reaction product solution for obtaining step (2) dries the filter cake by collected by suction filter cake, is made
Slow stick.
In the present invention, acryloyl chloride and/or lauroyl chloride are added dropwise in first mixed liquor under condition of ice bath
It refers to before the acryloyl chloride and/or lauroyl chloride is added dropwise, first first mixed liquor is placed under condition of ice bath,
Then acryloyl chloride and/or lauroyl chloride are added dropwise to and are placed in first mixed liquor under the condition of ice bath.In this hair
In bright, the structural formula of mulit-hydroxy fatty acid ester is R-COOCH2(CHOH)3C11H23, wherein R can be hydrogen (H), linear chain or branched chain
Alkyl, linear chain or branched chain alkyl, straight or branched alkoxyl, naphthenic base or aryl etc.；The strand of mulit-hydroxy fatty acid ester
The upper hydroxyl containing there are three can occur esterification with carboxylic acid or acyl chlorides, increase the esterification degree of strand, change hydrophile-lipophile balance
Value.
According to some specific embodiments, first weighs a certain amount of solvent n,N-Dimethylformamide and be placed in dry circle
In the flask of bottom, it is directly added into mulit-hydroxy fatty acid ester and triethylamine in proportion, will include n,N-Dimethylformamide, polyhydroxy rouge
The round-bottomed flask of fat acid esters and triethylamine is placed under condition of ice bath, weighs acyl chlorides (acryloyl chloride and/or the lauroyl of corresponding proportion
Chlorine) it is placed in constant pressure funnel and uses the mode being added dropwise that round-bottomed flask is added to control the knot of reaction rate and reaction product
Structure；Since reactivity is high and is exothermic reaction, reaction condition is ice bath.Acyl chlorides completion of dropwise addition reacts 1 under condition of ice bath
~3h stops reaction, filters, is drying to obtain the slow stick.In the present invention, the acyl chlorides and the mulit-hydroxy fatty acid ester
Molar ratio such as can be (2~4): 1, the acyl chlorides is selected from the group that is made of acryloyl chloride and lauroyl chloride；When the acyl
When chlorine is made of acryloyl chloride and lauroyl chloride, the molar ratio of the acryloyl chloride and the lauroyl chloride is (1~3): (1~
2)；In the present invention, n,N-Dimethylformamide is as solvent, such as can adjust dosage according to reaction system, so that entirely
Reaction system is convenient for stirring and is reacted；In the present invention, triethylamine is as acid binding agent, total dosage of the triethylamine and acyl chlorides
Molar ratio such as can be 1.02:1.
The present invention is provided in second aspect delays stick made from preparation method of the present invention described in first aspect.
The present invention provides a kind of preparation method of slow viscous type modified pitch in the third aspect, and the method includes walking as follows
It is rapid:
(a) matrix pitch (such as Panjin 90# pitch, SK90# pitch or shell SBS pitch) is heated to molten condition simultaneously
Stir the matrix pitch (such as 0.1~4h of stirring)；In the present invention, Panjin 90# pitch refers to Panjin north pitch stock
The 90# pitch (referred to as Panjin pitch) of part Co., Ltd production, SK90# pitch refer to the 90# drip of SK company, South Korea production
Green (referred to as SK pitch), shell SBS pitch refer to SBS (the polystyrene thermoplastic elastomehc of shell pitch Co., Ltd production
Property body) modified pitch (referred to as SBS pitch)；In the present invention, for example, matrix pitch can be heated to 140~150 DEG C with
So that the matrix pitch molten condition in a flowable.
(b) present invention is added while carrying out the stirring in step (a) into the matrix pitch in first aspect
Delay stick made from the preparation method so that the matrix pitch is uniformly mixed with the slow stick, obtained slow viscous type changes
Property pitch (slow viscous bitumen).
In the present invention, when slow stick being used for modified substrate pitch, the slow stick in the present invention can make pitch have
The characteristic of the slow viscous and low temperature thickening of high temperature viscosity reduction, medium temperature；Wherein, high temperature viscosity reduction refers to that the slow stick can be by slow stick
In active constituent fusing point it is lower, the slow stick under the state that is in a liquid state under the condition of high temperature can adsorb dissolution pitch in component, make
The high temperature viscosity of pitch reduces；Slow glue of medium temperature is to reduce pitch to the temperature sensitivity of external environment by delaying stick, is reduced mixed
The heat loss for closing material, slows down asphalt viscosity growth rate, and pitch rate of temperature fall is slack-off, to keep construction temperature, extends
Effective construction time of mixture increases working efficiency；Low temperature thickening is in service stage, as the extension of time is delayed in stick
Adhesion-promoting components so that asphalt viscosity is gradually recovered even more than matrix pitch, guarantee the pavement performance of mixture, it is early to prevent occurring
The diseases such as phase track and cold cracking.
According to some preferred embodiments, the dosage of the slow stick is 0.5~3wt% of the matrix pitch dosage
(such as 0.5wt%, 0.8wt%, 1.0wt%, 1.2wt%, 1.5wt%, 1.8wt%, 2.0wt%, 2.2wt%, 2.5wt%,
2.8wt% or 3.0wt%).
The present invention provides slow viscous type made from preparation method of the present invention described in the third aspect in fourth aspect and is modified
Pitch.
The present invention provides a kind of preparation method of slow viscous type modified asphalt mixture at the 5th aspect, the method includes
Following steps:
S1, graded broken stone (such as basalt graded broken stone) is heated to 135~145 DEG C (such as 135 DEG C, 140 DEG C or
145℃)；
Preparation side of the present invention for being heated to molten condition described in the third aspect is added in S2, Xiang Suoshu graded broken stone
Delay viscous type modified pitch made from method and stir evenly, obtains mixture；
Miberal powder is added in S3, Xiang Suoshu mixture and stirs evenly, slow viscous type modified asphalt mixture (slow viscous bitumen is made
Mixture).
According to some preferred embodiments, in step s 2, the temperature of the stirring is 140~150 DEG C, the stirring
Time be 10~25s；In step s3, the temperature of the stirring is 140~150 DEG C, and the time of the stirring is 5~10s.
According to some preferred embodiments, the use of the graded broken stone, the miberal powder and the slow viscous type modified pitch
The mass ratio of amount is (80~92): (3~8): (4~6).
Certainly in the present invention, the matrix for having been heated to molten condition can also be added directly into the graded broken stone
The gentle stick of pitch simultaneously stirs evenly, and obtains the mixture.
The present invention provides slow viscous type made from present invention preparation method described in the 5th aspect in terms of the 6th and is modified
Asphalt.
The present invention provides slow viscous type made from preparation method of the present invention described in the third aspect at the 7th aspect and is modified
Delay viscous type modified asphalt mixture in bituminous pavement made from pitch or the present invention preparation method described in the 5th aspect
Using.
Hereafter will the present invention is further described by way of example, but protection scope of the present invention is not limited to these
Embodiment.
Embodiment 1: the preparation experiment of slow stick.
1. mulit-hydroxy fatty acid ester and triethylamine is uniformly mixed with n,N-Dimethylformamide, obtain the first mixed liquor,
Then acryloyl chloride and lauroyl chloride are added dropwise in first mixed liquor under condition of ice bath, obtain the second mixed liquor；Its
In, the molar ratio of the dosage of the total dosage and mulit-hydroxy fatty acid ester of acryloyl chloride and lauroyl chloride is (2~4): 1, acryloyl
The molar ratio of the total dosage and triethylamine of chlorine and lauroyl chloride is 1:1.02, mole of the acryloyl chloride and the lauroyl chloride
Than for (1~3): (1~2).
2. 1. the second mixed liquor that step is obtained continues at 1~3h of reaction under condition of ice bath, reaction product solution is obtained.
3. then 2. reaction product solution that step is obtained dries the filter cake by collected by suction filter cake, it is made slow
Stick.
In the present embodiment, show to delay made from the present embodiment stick in 3400cm as infrared spectrum analysis (IR)-1Place
The stretching vibration peak of hydroxyl-OH reduces, and preliminary proof has synthesized target product, then further through differential scanning calorimetric analysis
(DSC) slow stick is characterized with thermogravimetic analysis (TGA) (TGA), has further confirmed that delaying stick made from the present embodiment is mesh
Synthetic product is marked, delaying under stick room temperature made from the present embodiment is white to pale yellow powder, and fusing point is 55~80 DEG C, thermal decomposition
Temperature is up to 250 DEG C, meets requirement of the modified pitch to slow stick.
Embodiment 2: the preparation of slow viscous type modified pitch and performance test.
1. two kinds of Panjin pitch, SK pitch matrix pitches are separately heated to molten condition and stir every kind of matrix pitch.
2. being added while the step 1. middle progress stirring into every kind of matrix pitch obtained slow viscous in embodiment 1
Two kinds of slow viscous type modified pitch are made so that every kind of matrix pitch is uniformly mixed with the slow stick in agent, be denoted as respectively Panjin+
Slow viscous bitumen, SK+ delay viscous bitumen；Wherein, in every kind of slow viscous type modified pitch, the dosage of the slow stick is matrix drip
The 1.5wt% of green dosage.
One, high temperature viscosity reducing effect is tested: the viscosity under viscous type modified pitch different temperatures slow to two kinds in the present embodiment
It is tested, the results are shown in Table 1；It is slow viscous according to Saal formula fitting by the viscosity test results under different temperatures in table 1
The viscosity-temperature curve of type pitch determines that theory most preferably mixes and stirs temperature and compacting temperature, and the results are shown in Table 2；Saal formula is
Lglg (η)=a-blg (273+T), wherein η is viscosity, unit cp；T is temperature, and unit is DEG C.
From the results shown in Table 1, the viscosity at all temperature of the slow viscous bitumen after slow stick is added is compared with matrix
Pitch is low, and the viscosity at 135 DEG C reduces amplitude and reaches 10~13%, calculated most by being fitted viscous kelvin relation curve in table 2
It is good to mix and stir temperature, it can be seen that in the case where correlation is all satisfied requirement, slow viscous bitumen theory, which most preferably mixes and stirs temperature, to drop
Low 4~7 DEG C, this may be to reduce the viscosity of pitch due to delaying the addition of stick, so that corresponding mix and stir temperature reduction；
In the present invention, temperature when being (0.17 ± 0.02) Pa.s with viscosity is to mix and stir temperature range；With viscosity be (0.28 ±
0.03) temperature when Pa.s is as compaction moulding temperature (compacting temperature) range.
Two, low temperature Efficient Adhesive Promotion is tested: being tested to 60 DEG C of viscosity of slow viscous bitumen, test result is as shown in table 3, builds
Vertical SK matrix pitch and SK+ delay the viscosity-temperature curve of viscous bitumen as shown in Figure 1, finding that slow viscous bitumen meets high temperature viscosity reduction and low temperature increases
Viscous requirement, in Fig. 1, what ordinate indicated is to have carried out taking logarithm process to viscosity, without unit.
Three, the slow viscous effect test of medium temperature is studied, test method so that SK matrix pitch and SK delay viscous bitumen as an example are as follows:
135 DEG C of fixed matrix pitch and the same high temperature starting point of slow viscous bitumen；First three minute distinguishes timing reading, to preferably hold drop
Tender feeling condition；In view of delaying the fusing point situation of viscosity bitumen modifier, matrix pitch and the slow temperature for gluing type modified pitch drop to 108 DEG C
When stop timing；Comparison cooling slack time is simultaneously drawn, and SK matrix pitch and SK delay the test result such as table 4 of viscous bitumen and scheme
Shown in 2.
It can be seen that the rate of temperature fall of matrix pitch always above slow viscous bitumen from table 4 and Fig. 2, at 6.5 minutes, SK
Matrix pitch temperature drops to 108 DEG C, and the slow viscous bitumen temperature of SK+ remains at 112 DEG C at this time, illustrates the heat dissipation speed of slow viscous bitumen
Rate is slower, i.e. viscosity recovery rate is slower, and temperature just reaches 108 DEG C when 8 minutes, extends 1.5 minutes, extension amplitude reaches
To 23%, in the present invention, extension amplitude refers to that slow viscous bitumen cools to 108 DEG C of extended times and matrix pitch cools down
To 108 DEG C of time ratios.
Panjin pitch and Panjin+slow viscous bitumen cooling rate, Panjin+slow are tested using above-mentioned same test method
The cooling rate of viscous bitumen has delayed 1.5 minutes, and extension amplitude has reached 25%, these are statistics indicate that delay the medium temperature rank of viscous bitumen
Section can effectively delay pitch cooling rate that pitch is made to keep higher temperature, mix and stir and be compacted when being conducive to construction.
Four, high-temperature behavior is tested: the present embodiment evaluates the high-temperature stability of pitch using 60 DEG C of viscosity, according to regulation
T0620-2000 carries out 60 DEG C of (under 60 DEG C of hot conditions just at summer road surface) dynamic viscosity tests, test knot to pitch
Fruit is as shown in table 5.As can be known from the results of Table 5, compared with matrix pitch, 60 DEG C of dynamic viscosities of slow viscous bitumen are increased, and are had
Conducive to guaranteeing that road surface is indeformable under high temperature and heavily loaded environment, slow viscous bitumen helps to ensure that the high-temperature behavior of slow viscous bitumen mixture
Five, cold performance test: 15 DEG C of needle penetrations of pitch are tested according to regulation T0604-2000, measurement result is shown in
Table 6；As can be known from the results of Table 6, the cryogenic property of pitch can be improved in the addition for delaying stick, reaches or close to Structure Dynamics In The Qinghai-tibet Region
The index of common 130# pitch (15 DEG C of needle penetrations are bigger, illustrate that its crack resistance at low-temperature is better).
Embodiment 3: the performance test of slow viscous type modified asphalt mixture.
One, cooling effect test: use the graded broken stone, miberal powder and pitch of identical proportion prepare respectively voidage for
The SK that 4.6% SK asphalt and voidage is 4.6% delays viscous bitumen mixture, mixes and stirs temperature needed for SK asphalt
Degree is 160 DEG C, and mixing and stirring temperature needed for the slow viscous bitumen mixture of SK is 150 DEG C；Equally using the graded broken stone of identical proportion, mine
Powder and pitch prepare the Panjin asphalt that voidage is 4.4% respectively and the Panjin that voidage is 4.4% delays viscous bitumen and mixes
Material is closed, it is 150 DEG C that temperature is mixed and stirred needed for Panjin asphalt, mixes and stirs temperature needed for the slow viscous bitumen mixture of Panjin and is
140 DEG C, it can thus be seen that asphalt is practical mix and stir during, the addition of slow stick can reduce pitch and mix and stir temperature
10 DEG C or so.
Two, water stability is tested: the SK asphalt and the slow viscous bitumen mixture of SK for being 4.6% by voidage, gap
The Panjin asphalt and Panjin that rate is 4.4% delay viscous bitumen mixture and carry out immersion Marshall test respectively: four kinds are dripped
Green mixture forms marshal piece, by " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTJ052-2000)
T0709 method, tests the residual stability of different types of asphalt, and test result is as shown in table 7.
Marshall residual stability is stability of asphalt mixture index, it is desirable that it is not less than 75%~80%, it can from table 7
Know, the addition of slow stick can increase the water stability of asphalt to a certain extent.
Table 3: slow viscous 60 DEG C of viscosity test results of type modified pitch.
Table 4:SK matrix and slow viscous type asphalt viscosity regeneration rate at any time.
Table 5: 60 DEG C of viscosity test results of pitch.
Table 6: 15 DEG C of penetration test results of pitch.
Table 7: the voidage and residual stability index of asphalt.
| Index | Voidage/% | Residual stability/% |
| SK asphalt | 4.6 | 92.8 |
| SK delays viscous bitumen mixture | 4.6 | 95.7 |
| Panjin asphalt | 4.4 | 81.0 |
| Panjin delays viscous bitumen mixture | 4.4 | 84.0 |
The method of the present invention, which is modified pitch by using a kind of novel slow stick, is prepared for slow viscous type modified pitch
And slow viscous type modified asphalt mixture, the viscosity of pitch when mixing and stirring can not only be reduced, and can guarantee asphalt viscosity after construction
Restore completely, will not influence the pavement performance of pitch；Slow viscous type modified pitch prepared by the present invention is a kind of green and environmentally friendly
Modified pitch, the advantages of prepared mixture has both HMA and WMA, and can overcome respective defect, the present invention is long-term to improving
Since low-temperature space asphalt pavement construction temperature limitation, reduce energy waste and exhaust gas to the destruction of environment, save asphalt content,
It improves bituminous pavement and uses quality, be with a wide range of applications.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And
These are modified or replaceed, the range for each technical solution of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of preparation method of slow stick, which is characterized in that described method includes following steps:
(1) mulit-hydroxy fatty acid ester and triethylamine are uniformly mixed with n,N-Dimethylformamide, obtain the first mixed liquor, then
Acryloyl chloride and/or lauroyl chloride are added dropwise in first mixed liquor under condition of ice bath, the second mixed liquor is obtained；
(2) the second mixed liquor that step (1) obtains is continued at into 1~3h of reaction under condition of ice bath, obtains reaction product solution；With
(3) then the reaction product solution for obtaining step (2) dries the filter cake by collected by suction filter cake, is made slow viscous
Agent.
2. delaying stick made from preparation method according to claim 1.
3. a kind of preparation method of slow viscous type modified pitch, which is characterized in that described method includes following steps:
(a) matrix pitch is heated to molten condition and stirs the matrix pitch；With
(b) it carries out that preparation side described in claim 1 is added into the matrix pitch while stirring in step (a)
Delay stick made from method so that the matrix pitch is uniformly mixed with the slow stick, is made to delay and glues type modified pitch.
4. preparation method according to claim 3, it is characterised in that:
The dosage of the slow stick is 0.5~3wt% of the matrix pitch dosage.
5. delaying viscous type modified pitch made from preparation method according to claim 3 or 4.
6. a kind of preparation method of slow viscous type modified asphalt mixture, which is characterized in that described method includes following steps:
S1, graded broken stone is heated to 135~145 DEG C；
It is added and has been heated to made from preparation method described in the claim 3 or 4 of molten condition in S2, Xiang Suoshu graded broken stone
Slow viscous type modified pitch simultaneously stirs evenly, and obtains mixture；With
Miberal powder is added in S3, Xiang Suoshu mixture and stirs evenly, slow viscous type modified asphalt mixture is made.
7. preparation method according to claim 6, it is characterised in that:
In step s 2, the temperature of the stirring is 140~150 DEG C, and the time of the stirring is 10~25s；
In step s3, the temperature of the stirring is 140~150 DEG C, and the time of the stirring is 5~10s.
8. preparation method according to claim 6 or 7, it is characterised in that:
The mass ratio of the dosage of the graded broken stone, the miberal powder and the slow viscous type modified pitch is (80~92): (3~8):
(4~6).
9. delaying viscous type modified asphalt mixture according to made from the described in any item preparation methods of claim 6 to 8.
10. delaying any one of viscous type modified pitch or claim 6 to 8 made from preparation method according to claim 3 or 4
Delay viscous application of the type modified asphalt mixture in bituminous pavement made from the preparation method.
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| CN201811646436.2A CN109761526A (en) | 2018-12-29 | 2018-12-29 | A kind of slow stick, slow viscous type modified pitch, slow viscous type modified asphalt mixture and its preparation method and application |
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| CN201811646436.2A CN109761526A (en) | 2018-12-29 | 2018-12-29 | A kind of slow stick, slow viscous type modified pitch, slow viscous type modified asphalt mixture and its preparation method and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116694094A (en) * | 2023-06-19 | 2023-09-05 | 北京工业大学 | Environment-friendly type modified asphalt with slow-adhesion odor-removal high-adhesion powder and preparation method thereof |
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| JPS60204791A (en) * | 1984-03-30 | 1985-10-16 | Mitsubishi Chem Ind Ltd | Production of phospholipid-mimic monomer |
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| JPS60204791A (en) * | 1984-03-30 | 1985-10-16 | Mitsubishi Chem Ind Ltd | Production of phospholipid-mimic monomer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116694094A (en) * | 2023-06-19 | 2023-09-05 | 北京工业大学 | Environment-friendly type modified asphalt with slow-adhesion odor-removal high-adhesion powder and preparation method thereof |
| CN116694094B (en) * | 2023-06-19 | 2024-06-25 | 北京工业大学 | Environment-friendly type modified asphalt with slow-adhesion odor-removal high-adhesion powder and preparation method thereof |
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