CN107523072A - A kind of warm mix Sulphur asphalt, contain its compound and preparation method thereof - Google Patents
A kind of warm mix Sulphur asphalt, contain its compound and preparation method thereof Download PDFInfo
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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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
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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
- C08L2201/00—Properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention discloses a kind of warm mix Sulphur asphalt.The product includes warm-mixing agent, matrix pitch and sulphur.The warm-mixing agent is that Tissuemat E is raw material, is prepared through sweating process.In sweating effort, the organic substance that oil-soluble decomposable asymmetric choice net is produced to gas is added in by-product Tissuemat E raw material in advance, micro-bubble is formed in wax layer using its heated rear caused gas, is advantageous to the quick discharge of liquid composition, so as to be advantageous to remove the lower-molecular-weight component in raw material；Meanwhile liquid composition is carried out to force to separate solids fraction and liquid composition by wax layer using air-flow in sweating effort, more efficiently remove the lower-molecular-weight component in raw material.The warm mix Sulphur asphalt of the present invention reduces the preparation temperature and temperature in use of Sulphur asphalt, reduces the generating capacity of pernicious gas, while improve the high temperature stability performance of bituminous paving.
Description
Technical field
The present invention relates to a kind of warm-mixed asphalt, specifically a kind of warm mix Sulphur asphalt, compound and its system containing it
Preparation Method, belong to petroleum industry and basic material chemical field.
Background technology
The reasons such as the heavy loading for increasingly increasing and transporting due to China's vehicle, bituminous paving occur rut, gather around bag etc.
Phenomenon is on the rise, especially prominent in south China hot area.The phenomenon is broken as the current bituminous highway in China is main
One of bad form, bituminous paving traffic safety and service life are had a strong impact on.
From cementitious matter itself, one of the reason for 60 DEG C of viscosity of pitch are relatively low and cause this breakoff phenomenon.Drip
One of the index of 60 DEG C of blue or green viscosity as sign asphalt high-temperature stability, can very well simulation bituminous paving in summer road table
When temperature reaches 60 DEG C of high temperature, the resistance to flow energy of pitch.What Ministry of Communications promulgated《Standard specification for construction and acceptance of highway asphalt pavement》In
60 DEG C of dynamic viscosities of road asphalt have formally been classified as road asphalt technical target of the product by " bi tumenf orr oad technical requirements ".
Therefore, 60 DEG C of dynamic viscosities of bi tumenf orr oad how are effectively improved to be particularly important.
To improve 60 DEG C of dynamic viscosities of pitch, improve the high-temperature stability of pitch, Unexamined Patent 8-12977,
CN1289818A, CN1076386C etc. are using oxidation or semi-oxidized method, at a certain temperature, by toward being passed through sky in pitch
Gas, make pitch that the reactions such as oxidation, polymerization occur, change the composition structure of pitch, realize the purpose for improving asphalt viscosity.So
And bituminous paving is with the increase of service life, asphalt component therein can the aging because of illumination, property is deteriorated, and road conditions quality becomes
It is bad.And it is actually a kind of process for making asphalt component advance aging before applied to road to use oxidizing process production pitch,
Service life of the pitch on road surface, and oxidizing process production pitch can be also shortened while pitch performance is improved
Meeting big energy-consuming, and more waste gas is produced, the health and environment of people are adversely affected.
CN97116936.5 provides a kind of production method of the higher heavy duty road asphalt of 60 DEG C of viscosity.The pitch by
Oman's straight asphalt takes solvent extraction and semi-oxidized method after propane de-oiling PROCESS FOR TREATMENT, then through semi-oxidized PROCESS FOR TREATMENT
With reference to asphaltum with high viscosity, but this method complex process is prepared, extractive process needs substantial amounts of solvent, and operating pressure is larger, solvent
It is also easy to cause fire；Oxidizing process can equally produce large quantity of exhaust gas, cause air pollution.
CN201210561929.2 discloses a kind of asphalt caulk, including：Potassium chloride, metanitrophenol, anthraquinone, dodecyl
The bromo- n-butyl alcohol of benzene sulfonic acid sodium salt, etamon chloride, hexadecyltri-n-butylphosp, 4-, diethylamino ethanol caproate, three
Acetyl fluoride acetone praseodymium.It is to prepare asphalt caulk the purpose of the patent although having used anthraquinone in the patent, rather than for improving
60 DEG C of viscosity of road pitch.
CN201110441529.3 is the invention discloses a kind of high-viscosity modified asphalt, by common A levels pitch, thermoplastic elastomehc
Property body, high-phenylethylene, bulking agent, stabilizer composition, obtain 60 DEG C of viscosity through the processing step such as being swelled, shearing or grind, develop
Higher modified pitch.But this method is more harsh to equipment requirement, material and facility investment is higher, can increase considerably production
Cost, and there is problem in the storage stability of product, laminated segregation phenomenon easily occurs after long-time storage.
Research is found, sulphur is added in pitch and is prepared into Sulphur asphalt, with the highway of Sulphur asphalt compound making
With obvious anti-rut behavior.However, because Sulphur asphalt compound can discharge substantial amounts of hydrogen sulfide, sulfur dioxide in use
Deng pernicious gas, it is restricted its application.Sulphur asphalt compound making highway can be used by how developing, and it is anti-to improve it
Rut performance, reduce air pollution as far as possible again, turn into new research topic.This just needs to be combined Sulphur asphalt with warm mix technology
Get up.
Warm mix asphalt technologies mainly have three kinds of modes：First, using the higher emulsification drip of evaporated residue content
Green grass or young crops is low compared with the temperature of hot asphalt about 30~50 DEG C with building stones mix, which at a temperature of 80~120 DEG C；Second, in mixing
Water during compound（Or the aqueous solution of surfactant）Added simultaneously in mix tank with pitch, due to the presence of water, make pitch
Foaming, reaches viscosity reducing effect.But above two method can produce substantial amounts of vapor, easily cause equipment corrosion, also frequently
Generation stone flour conglomeration, the problems such as causing cleaner to block, made troubles to production.The third method is in advance to add warm-mixing agent
It is added in pitch, then takes the mode of production same with common hot-mix asphalt mixture, it is easy to operation, it is easily single by production
Position is received.This kind of method reduces the high temperature viscosity of pitch, changes pitch by adding warm-mixing agent in pitch in advance
Viscosity-temperature curve, so as to reduce the mix temperature of pitch and building stones, reach warm mix effect.But presently used warm-mixing agent is reducing
While asphalt high-temperature viscosity, can generally also cause the reduction of 60 DEG C of viscosity of pitch, make the high-temperature stability of asphalt by
To loss.
In polythene production process, a small amount of oligomer can be produced, i.e., low molecular weight polyethylene or do Tissuemat E.
The molecular weight distribution of these Tissuemat Es is wider and contains substantial amounts of low-molecular-weight component, when being directly used as asphalt warm-mix agent, although
Warm mix effect can be played, but also easily causes road to gather around the breakoff phenomenons such as bag or rut.How effectively to remove therein
Low-molecular-weight component, it is allowed to be more suitable for asphalt warm-mix agent, is the problem studied in the industry.
CN200880116167.7（The asphalt modifier for " warm mix " including tackifier）Utilize surfactant group
Divide, wax component, resin Composition are prepared for asphalt warm-mix agent.It plays warm mix effect using the lubrication of surface active agent composition
Fruit；Wax component（Vegetable wax, animal wax, mineral wax, amide waxe, oxidized wax etc.）Efficient Adhesive Promotion is played with resin Composition, to make up
The loss of asphalt viscosity caused by above-mentioned surface active agent composition.Component used in the patent is excessive, and is easy to drop
60 DEG C of viscosity of low pitch, the high-temperature stability of pitch is influenceed, can also reduce the adhesiveness of pitch and building stones.Although the tree of addition
Fat component such as rosin, phenolic resin etc. can make up the loss of the asphalt viscosity caused by above-mentioned surface active agent composition, but set
Fat component and the compatibility of pitch are bad, easily cause pitch to be layered during long-time storage.
CN201010558295.6（A kind of asphalt mixture warm-mixing modifier and preparation method thereof）Utilize F-T waxes, plasticising
Agent, polyacid, synthetic resin, petchem prepare warm mix modifying agent, and wherein F-T waxes are used to reduce asphalt viscosity, and its carbon is former
Subnumber is between 40~80（It is preferred that between 45~70）, n-alkane ratio be more than 80%（It is preferred that between 85%~95%）, acid number 0
~1（It is preferred that between 0~0.5）, fusing point is between 55~120 DEG C（It is preferred that between 70~110 DEG C）.The patent does not introduce F-T waxes
The source of raw material, and the F-T wax stocks needle penetration from embodiment（25℃）Only 53.2（10-1mm）See, contain in the F-T wax stocks
There is more lower-molecular-weight component, this F-T wax stocks can reduce by 60 DEG C of viscosity of asphaltic products.
In terms of wax product production technology, conventional separation manufacturing process has distillation, solvent separation, sweating separation etc..This
The described warm-mixing agent of invention, can use for reference wax sweating technique and be produced.
So-called wax sweating separation method is to carry out separating-purifying using the different property of various component fusing points in wax.In wax
The molecular weight of various components Bu Tong can all make its fusing point different with structure.When being all n-alkane, the larger positive structure of molecular weight
The fusing point of alkane is higher, and the fusing point of the less n-alkane of molecular weight is relatively low；When molecular weight is identical, isoparaffin and cycloalkane
Fusing point to be less than n-alkane, and isomery degree more high-melting-point is lower.
Common sweating process mainly includes the following steps that：（1）Preparation：Pad water（Sweatbox ware plate is full of with water
Lower space）After feed（Load sweatbox when raw material is heated to more than fusing point being in a liquid state）；（2）Crystallization：By raw material with little
10~20 DEG C are progressively cooled to below its fusing point in 4 DEG C/h rate of temperature fall.In cooling procedure, various components are by fusing point by height
Crystallize to form solid successively to low order；（3）Sweating：After wax layer temperature reaches default cooling final temperature, bleed off
Pad water；Raw material is slowly heated to default sweating final temperature again.In sweating effort, various components by fusing point by it is low to
High order is successively fused into liquid and flowed out（Under wax）, the wax layer residue that finally obtains（On wax）It is exactly high-melting-point, low contains
The wax of oil；（4）It is refined：Collect crude product（Sweating effort terminates follow-up high-temperature of continuing rising, is taken out with fusing on wax, is thick production
Product）, through clay-filtered（Predetermined temperature, mistake after addition carclazyte and constant temperature were stirred to the scheduled time are warming up to after crude product is melted
Filter）Afterwards, reshaping, packaging are purpose product.
To common sweating separation method, the solids fraction in the sweating effort that heats up（The wax of higher melt）And liquid composition
（Oil and the wax compared with low melting point）Although being respectively at two kinds of phases of solid and liquid, it also is difficult to be kept completely separate.It is final to make
The oil content of product meets the requirements, and generally use extends sweating sessions and the method for improving sweating final temperature, but can so lead
Cause the production cycle long and product yield declines.
Common sweating separating technology can produce fusing point has thick flaky crystal structure under 40 DEG C~60 DEG C of solid-state
Soap manufacturing paraffin and low melt point paraffin, be not suitable for producing wax product of the fusing point more than 70 DEG C.Experiment shows that common sweating process is given birth to
Fusing point is produced in 70 DEG C or so of wax product, the carbon dispersion of distribution and oil content on sweating later stage wax are unrelated with yield, i.e., on wax
The carbon dispersion of distribution and oil content do not decline with the decline of yield, so so far there are no with sweating process produce fusing point at 70 DEG C
The report of the wax product of left and right.
For many years, sweating method has obtained some development, such as CN89214332 in production equipment and process aspect（Vertical type square
Shape multipul sections spacer diaphoresis tank）、CN94223980.6（Ware type sudorific device）、CN98233254.8（Paraffin sweating pot）、
CN200920033500.X（Novel paraffin sweating tank）、CN201210508905.0（A kind of Efficient paraffin sweatbox）、
CN201320127680.4（Tubular type paraffin deoiler）Deng being improved in sweating equipment；CN91206202（It is a kind of efficient
Paraffin sweating pot）Improved on sweating process, but these improvement can not still produce wax product of the fusing point more than 70 DEG C.
Sweating separating technology is to be currently known unique solvent-free separation method for commercial scale petroleum paraffin product,
In promotion green low-carbon, today of environmental protection and energy saving, do not influenceed while asphalt high-temperature viscosity is reduced using sweating process production
The demand of the asphalt warm-mix agent product of its applied at elevated temperature performance is more urgent.
In existing warm-mixed asphalt preparation process, while asphalt mixture mixing temperature is reduced, it will usually reduce pitch
60 DEG C of viscosity or ductility, so as to have impact on the high-temperature stability of asphalt or low temperature anti-cracking performance.How to use
A kind of special warm-mixing agent, without influenceing its high and low temperature performance while asphalt mixing and forming temperature is reduced, turn into
A hot issue of warm-mixed asphalt is developed at present.
In natural gas processing and petroleum refining process, in order to produce clean fuel, sulphur therein need to be removed, so as to produce
Substantial amounts of sulphur byproduct, makes sulphur market show easy situation.How to effectively utilize sulphur, solve sulphur
Market, turn into natural gas processing and oil refining enterprise's urgent problem to be solved.Further, since China's vehicle increasing and
The reasons such as the heavy loading of transport, rut, which occurs, for bituminous paving, gathers around phenomena such as bag is on the rise, in south China hot area particularly
It is prominent.The phenomenon has turned into one of main failure mode of the current bituminous highway in China, has had a strong impact on bituminous paving driving peace
Complete and service life.Research shows, sulphur is added to the making for being used for road in pitch, can not only expand the application of sulphur
Field, the market for expanding sulphur, but also the anti-rut behavior of bituminous paving can be improved.
Early in 1900, people were just had started to sulphur come modified pitch, but because sulphur price at that time is surging, and sulphur changes drip
Blue or green compound discharges H in process of production2The problem of sulfurous gas such as S, constrain the development of sulphur modified asphalt technology.Later, with
The exploitation of polymer modified asphalt, sulphur are also applied in pitch, primarily as the stabilization of polymer modified asphalt
Agent, to improve product storage stability.But dosage of the sulphur in polymer modified asphalt is seldom, only 0.01wt% ~
0.1wt%, it is not enough to promote extensive application of the sulphur in pitch.Therefore, how substantial amounts of sulphur to be used in pitch, and not
Cause air pollution, this is the contradictory problems for needing to solve.
CN1690126 describes a kind of by a certain proportion of sulphur, carbon, smog inhibitor and plasticizer addition matrix pitch
The middle method for preparing modified asphalt mixture by SEAM.
CN103030984A describes one kind and sulphur and crystal whisker of gypsum, smog inhibitor is added in matrix pitch and prepared
The method of sulfur modified pitch.
CN102321373A describes a kind of preparation method of warm mix Sulphur asphalt, and sulphur, plasticizer specifically are mixed into 1
Form linear polymeric material within ~ 24 hours, then by above-mentioned linear polymeric material and eliminating smell agent, fumet add 130 DEG C ~
Mixed in 160 DEG C of matrix pitches at least 30 minutes and obtain warm-mixed asphalt.
Polymer modified asphalt first is prepared into matrix pitch and SBS etc. in CN101443558B, then in modified pitch
Middle addition sulphur, diatomite etc. are prepared into warm-mixed asphalt, there is addition fiber etc. in compound mix, be prepared into warm mix antiskid,
Noise-reduction asphalt road surface material.
CN201110236016.9 describes a kind of preparation method of warm-mixed asphalt, and sulphur, plasticizer specifically are mixed into 1
Form linear polymeric material within ~ 24 hours, then by above-mentioned linear polymeric material and eliminating smell agent, fumet add 130 DEG C ~
Mixed in 160 DEG C of matrix pitches at least 30 minutes and obtain warm-mixed asphalt.But the preparation of Sulphur asphalt and temperature in use are higher, can release
The toxic gases such as hydrogen sulfide, sulfur dioxide are released, the health hazard to environment and workmen is larger, suppresses although adding smog
What agent, fumet, eliminating smell agent etc. can partly suppress these toxic gases distributes or covers its penetrating odor, but these methods
Can not all solve the problems, such as that Sulphur asphalt smell during preparation and use is greatly and poisonous from root.
CN201510022090.9 discloses a kind of Warm-Mix Bitumen Mixture and preparation method thereof, wherein warm-mixing agent used
It is using macromolecule alkane and aromatic naphtha as raw material, and adds halogen and catalyst preparation obtains.Although the patent is in certain journey
Solve above mentioned problem on degree, but during warm-mixing agent is prepared, because the reaction temperature of intermediate is low, and lack catalysis
Agent, reaction speed is slower, and intermediate activity is relatively low, have impact on the extent of reaction of intermediate and aromatic naphtha, and reaction depth is not allowed yet
Easy to control, obtained warm-mixing agent property is unstable, have impact on the application effect in pitch.In addition, the warm-mixing agent preparation process
It is complex, the warm-mixing agent is used in pitch, have also appeared the problem of ageing resistace is poor.
Temperature in use, the system of sulfur modified pitch are not effectively reduced during Sulphur asphalt is prepared in the prior art
Standby and temperature in use is higher, can discharge the toxic gases such as hydrogen sulfide, sulfur dioxide, the health hazard to environment and workmen
It is larger, although distributing or covering it for these toxic gases can partly be suppressed by adding smog inhibitor, fumet, eliminating smell agent etc.
Penetrating odor, but these methods can not all be solved from root Sulphur asphalt during preparation and use smell greatly and it is poisonous
The problem of.
The content of the invention
To solve in the prior art the problems such as Sulphur asphalt temperature in use is higher, easily causes environmental pollution, the present invention is first
Provide a kind of warm mix Sulphur asphalt.By adding a kind of self-control warm-mixing agent, it can substantially reduce the production of Sulphur asphalt and make
With temperature, mitigate Sulphur asphalt caused air pollution in production and use, while the heat endurance of pitch can also be improved,
Improve ageing resistace.More sulphur can be added, promotes application of the sulphur in pitch, expand sulphur applies model
Enclose.
The technical purpose of the present invention is achieved through the following technical solutions：
A kind of warm mix Sulphur asphalt, include the component of following mass fraction：
33 ~ 79.5 parts of matrix pitch；
0.5 ~ 7 part of warm-mixing agent；
20 ~ 60 parts of sulphur；
The warm-mixing agent is prepared using following methods：
（1）Charging：After the Tissuemat E raw material heating fusing of polyethylene by-product, oil-soluble decomposable asymmetric choice net is added thereto and produces gas
The organic substance of body, load sweatbox after stirring；
（2）Crystallization：Wax layer is cooled to 5 DEG C~30 DEG C below raw material melt drop temperature of cooling with 2.0 DEG C/h~4.0 DEG C/h speed
Final temperature；
（3）Heating-constant temperature sweating：Heated up with 1.5 DEG C/h~3.5 DEG C/h speed, wax layer reaches one section of predetermined temperature and constant temperature
Stop sweating after time, wax layer is forced air flow through in sweating effort；
（4）Blowing：Residue in sweatbox is released, as described asphalt warm-mix agent.
Further, in the warm mix Sulphur asphalt of above mass fraction composition, the addition of the warm-mixing agent is preferably 1
~ 7 parts.
Step of the present invention（1）Described oil-soluble decomposable asymmetric choice net material include organic azo compound, sulfonyl hydrazines compound,
One kind in organic nitroso compounds, organic peroxide（Class）It is or several（Class）, preferred organic azo compound and organic
One or more in peroxide.The addition of oil-soluble decomposable asymmetric choice net material is the 0.01%~15.00% of raw material weight, preferably
For 0.03%~8.00%.
Wherein, described organic azo compound is selected from ABVN（ABVN）, azodiisobutyronitrile（AIBN）, it is even
Nitrogen dicyclohexyl formonitrile HCN（ACCN）The one group of material formed；Described sulfonyl hydrazines compound is selected from benzene sulfonyl hydrazide, to toluene sulphur
Hydrazides, 4,4 '-bis oxide（Benzene sulfonyl hydrazide）The one group of material formed；Described organic nitroso compounds are selected from dinitroso five
Methenamine and/or N, N '-dimethyl N, N '-dinitroso phthalic amide；Described organic peroxide was selected from
Aoxidize dibenzoyl（BPO）, dilauroyl peroxide（LPO）, diacetyl peroxide, dicetyl peroxydicarbonate isopropyl ester（IPP）, peroxide
Change two dicyclohexyl carbonates（DCPO）Etc. one group of material of composition.
In the present invention, step（2）The rate of temperature fall of crystallization preferably 2.5 DEG C/h~3.5 DEG C/h.Described cooling final temperature
10 DEG C~20 DEG C preferably below raw material melt drop temperature.
In the present invention, the preferred sweating ware of described sweatbox, and in wax layer pressue device added above and/or in wax layer
Increase vacuum plant below.When preparing described warm-mixing agent, step（3）In sweating effort, described forces air flow through wax
Layer makes wax layer upper and lower form pressure differential and realized using increasing air pressure above wax layer and/or air pressure being reduced below wax layer.
Described pressure differential is generally 0.1~5.0 atmospheric pressure, preferably 0.2~2.0 atmospheric pressure, to force air flow through wax layer.
In the present invention, step（3）The heating rate of the sweating effort preferably 2.0 DEG C/h~3.0 DEG C/h；The heating
Predetermined temperature is purpose product melt drop temperature -10 DEG C~purpose product melt drop temperature.After wax layer reaches predetermined temperature, increase the constant temperature stage
So that solids fraction separates more fully with liquid composition, the time in constant temperature stage is 0~5.0 hour, and preferably 0.1~5.0 is small
When, more preferably 1.0~5.0 hours.
In the present invention, the programming rate and cooling rate of said wax layer, can by air bath, water-bath, oil bath or its
He is controlled feasible mode, it is preferred to use water-bath or oil bath.Using water-bath or oil bath mode control wax layer heating rate and
During rate of temperature fall, chuck can be increased outside sweating ware, chuck is connected with removable coil pipe and the circulatory system, and chuck, coil pipe etc. can
Make wax layer lifting/lowering temperature process faster, wax layer more uniform temperature；The circulatory system has program cooling/heating function, and the circulatory system adds
Enter the materials such as water or conduction oil as circulatory mediator.
In the present invention, step（3）It is described to force air flow through wax layer and implement in sweating effort any stage, preferably
Implement initial stage in sweating.
In the present invention, step（3）The described wax layer that forces air flow through is utilized in what increase air pressure above wax layer was realized,
0.2~2.0 atmospheric pressure can such as be applied above wax layer（Gauge pressure）Pressure, and wax layer below remain normal pressure.
In the present invention, step（3）The described wax layer that forces air flow through is utilized in what reduction air pressure below wax layer was realized,
Normal pressure can be such as kept above wax layer, and -0.2~-1.0 atmospheric pressure are maintained below wax layer（Gauge pressure）Pressure.
In the present invention, described material polyethylene wax is that caused oligomer produces through decolourizing in polythene production process
, its melt drop temperature is generally 70~98 DEG C.
Analysis shows, the melt viscosity of the Tissuemat E of polyethylene by-product is low, and this is to being to have as asphalt warm-mix agent
Benefit, but it is reduced by 60 DEG C of viscosity of asphaltic products when being used in asphaltic products due to a large amount of low-melting components be present,
Therefore the Tissuemat E of polyethylene by-product is not suitable for being directly used as asphalt warm-mix agent.
Sweating method is separated using the different property of various component fusing points.For the research table of sweating effort
Bright, liquid composition is gradually discharged along crystalline portion in sweating effort, situation about being flowed similar to liquid in capillary.
But for high melting-point wax of the fusing point at 70 DEG C or so, because raw material chemical composition is complicated, cause crystals upon crystallization structure tiny
Densification, the discharge to liquid composition form huge filter flow resistance power, and this results in the common sweating for only leaning on gravity natural separation
Solids fraction is difficult to be kept completely separate with liquid composition in journey, therefore common sweating separating technology can not produce fusing point more than 70 DEG C
Wax product.
In order to prepare asphalt warm-mix agent, by the further investigation of the composition of the Tissuemat E to polyethylene by-product, for it
It is the reason for causing to be not suitable for being directly used as asphalt warm-mix agent containing a large amount of low-melting components, uses for reference wax sweating method and remove eutectic
Point component.By the further investigation to common sweating effort, it is difficult to liquid composition separate reason for solids fraction, in sweating
During using forcing air flow through wax layer, while oil-soluble decomposable asymmetric choice net material is further preferably added after raw material heating fusing, and
Increase the constant temperature stage in sweating effort, these measures effectively removes low-melting component, product is suitable for use as pitch warm mix
Agent.
The reason for being difficult to separate with liquid composition for solids fraction in sweating effort, by using gas in sweating effort
Stream carries out method pressure solids fraction and the separation of liquid composition of liquid composition by wax layer, enhances separating effect and adds
Fast separating rate；Oil-soluble decomposable asymmetric choice net material further preferably is added after raw material heating fusing simultaneously, these material decomposable asymmetric choice nets produce
Gas, and have preferable dissolubility in the feed and be dispersed in wax layer.Raw material arrives hair after being cooled to below melt drop temperature
Wax layer is in softer solid state in the time that sweat process terminates, and decomposable asymmetric choice net material slowly decomposes the gas discharged during this
Body, dispersed micro-bubble can be formed in wax layer, the space that these micro-bubbles are formed is easy in sweating effort
Some tiny passages are formed in wax layer, so as to be advantageous to the discharge of liquid composition in sweating effort.It is preferred that decompose generation nitrogen
Or the oil-soluble decomposable asymmetric choice net material of the gas of the nontoxic no special odor such as carbon dioxide, and the other materials molecular weight generated
It is low, it will discharge wax layer with liquid composition in sweating effort.It is aided with the constant temperature stage of sweating effort again so that solids fraction
The methods of more abundant is separated with liquid composition so that sweating process can prepare the asphalt warm-mix agent for not containing low-melting component.
Described matrix pitch can select the asphalt that various crude oil and different process produce, such as straight asphalt, oxygen
Change the one or more in pitch, solvent deoiling pitch or blend asphalt.
Described sulphur is sulphur caused by oil or natural gas processing process, can be technical grade or food
Grade；Can be rhombic sulfur or monoclinic sulphur；Can be sheet, powdered or graininess in form.
A further object of the present invention is to provide a kind of warm mix Sulphur asphalt compound, which uses foregoing warm mix sulphur
Sulphur pitch.
The technical scheme is：A kind of warm mix Sulphur asphalt compound, in terms of compound gross mass, including following mass parts
Several components：4.0 ~ 6.0 parts of warm mix Sulphur asphalt, 1.0 ~ 3.0 parts of miberal powder, gather materials 91.0 ~ 95.0 parts；
Further, it is described gather materials at least one of gather materials selected from limestone, basalt, andesite or granite；The collection
The proportioning of material meets any one in close-graded AC-10, AC-13, AC-16 or AC-20.
The miberal powder is formed by ore grinding, and wherein particle proportion of the particle diameter less than 0.075mm presses mass fraction
Meter is more than 70%.
Present invention also offers the preparation method of warm mix Sulphur asphalt compound recited above, comprise the following steps：
1. the preparation of warm mix Sulphur asphalt：Matrix pitch is first heated to 110 DEG C ~ 140 DEG C, stirs and adds warm-mixing agent, is added
Sulphur, stirring；
2. by stirred tank and gathering materials and being heated separately to 110 DEG C ~ 150 DEG C, it will gather materials, miberal powder while be added in stirred tank, stirring；
3. warm mix Sulphur asphalt is heated to molten condition, be added in stirred tank, with gathering materials, miberal powder mix, obtain institute
State warm mix Sulphur asphalt compound.
Further, step 1. it is middle addition warm-mixing agent after the stirring reaction time be 30 ~ 60min, add sulphur after stirring instead
It is 40 ~ 120min between seasonable.The preparation of the production process of the warm mix Sulphur asphalt carry out and added to take out very in closed container
Empty set is united, and caused pernicious gas in production process is collected, absorbed by aqueous slkali, such as sodium hydroxide.
Compared with prior art, warm mix Sulphur asphalt compound of the invention has the following advantages that：
1st, described warm-mixing agent is homemade warm-mixing agent, using special " sweating " technique, enhances liquid composition and solid-state group
Point separating effect and accelerate separating rate, the low-melting component in obtained warm-mixing agent is removed, not only to pitch have
There is warm mix effect, but also taken into account the high-temperature stability and high temperature anti-rut behavior of pitch.
2nd, warm mix Sulphur asphalt temperature in use of the present invention is low, saves the energy, while reduces the generating capacity of pernicious gas, has
Beneficial to environmental protection.
3rd, warm mix Sulphur asphalt of the present invention is first prepared into warm-mixed asphalt before sulphur is added with warm-mixing agent and pitch, drops
The low melting temperature of pitch, then adds sulphur, can reduce the preparation temperature of Sulphur asphalt, reduce pernicious gas again
Generating capacity.
4th, warm mix Sulphur asphalt production process of the present invention is carried out in closed container, is added to vacuumize on reactor and is
System, can be caused pernicious gas such as H in production process2After S etc. is collected, row environmental protection is absorbed into by sodium hydroxide aqueous slkali
Processing, reduce air pollution during Sulphur asphalt production.
5th, more sulphur can be added in warm mix Sulphur asphalt of the present invention, promotes application of the sulphur in pitch, expands
The market of sulphur, reduces cost of building the road, saves substantial amounts of pitch resource.
6th, method of the invention has that plant investment is low, production process is simple and operating cost is low, safety, energy-conservation and without molten
The advantages that environment, is polluted in agent.
Embodiment
Technical scheme is described in detail with reference to following embodiments, but the invention is not restricted to following examples.Such as nothing
Special instruction, involved % is mass percent below.
Embodiment 1
It is divided into three steps：（One）Prepare warm-mixing agent,（Two）Preparation warm mix Sulphur asphalt,（Three）Prepare the mixing of warm mix Sulphur asphalt
Material.
（One）Prepare warm-mixing agent
（1）Preparation and charging
Pad water below sweating ware plate；The sealing system of sweating ware and pressurized buffer tank and compressor are connected；Under sweating ware
Pressure-reducing cushioning tank is installed and connects vavuum pump in portion；Sweating ware chuck and removable coil pipe are connected with the circulatory system, coil pipe is consolidated
It is scheduled on sweating ware；Using conduction oil as medium, start the heating function of the circulatory system, recycle oil is warming up to 94 DEG C.
Using the Tissuemat E of petrochina Jilin Petrochemical ethylene plant high density polyethylene device by-product as raw material（Melt drop temperature 90.3
℃；25 DEG C of dmm of needle penetration 43；55 DEG C of dmm of needle penetration ＞ 200, the polyethylene is can be seen that from the needle penetration of 25 DEG C and 55 DEG C
Contain a large amount of low melting points in wax.）, 94 DEG C of fusings are heated to, then addition accounts for the azo dicyclohexyl of raw material weight 14.0%
Formonitrile HCN, added after stirring in sweating ware.
（2）Crystallization
Start the refrigerating function of the circulatory system, wax layer temperature is dropped to 80.0 DEG C with 2.5 DEG C/h rate of temperature fall.Close circulation
The refrigerating function of system.
（3）Heating-constant temperature sweating
Discharge sweating ware pad water.The outlet of sweating ware connects intermediate storage tank to receive under wax；The sealing system on sweating ware top is installed；
Start compressor and keep pressurized buffer pressure inside the tank stable in 1.1~1.3 atmospheric pressure（Gauge pressure）, sweating ware ware plate lower section is protected
Hold normal pressure；Start circulation system function, wax layer temperature is increased to 85.0 DEG C with 2.5 DEG C/h heating rate；Stop compressing
Machine.
Start vavuum pump and keep pressure-reducing cushioning pressure inside the tank stable in -0.4~-0.6 atmospheric pressure（Gauge pressure）, in wax layer
Square air pressure keeps normal pressure；Continue to make wax layer temperature be increased to 90.0 DEG C of simultaneously constant temperature 4.0 hours with 2.5 DEG C/h heating rate, with
The solids fraction in wax layer is set to be sufficiently separated with liquid composition.Stop vavuum pump, terminate sweating effort.
（4）Blowing
Sweating ware exports changing-over products pot, continues to raise the temperature of conduction oil to 110 DEG C, is taken out with fusing on wax, as pitch
Warm-mixing agent.
Asphalt warm-mix agent product yield is 36.7%（Relative to raw material by-product Tissuemat E）.Asphalt warm-mix agent product
Matter：94.8 DEG C, 25 DEG C dmm of needle penetration 2 of melt drop temperature, 55 DEG C of needle penetration 23dmm.Production is can be seen that from 25 DEG C and 55 DEG C of needle penetrations
Low melting point removes substantially in thing.
（Two）Prepare warm mix Sulphur asphalt
Weigh 7kg above-mentioned warm-mixing agent（Ⅰ）, it is added to No. 50 solvent deoilings of husky Crude Oil that quality is 33kg, temperature is 140 DEG C
In pitch, 60min is stirred, obtains warm-mixed asphalt；Then 60kg sulphur is added in above-mentioned warm-mixed asphalt, stirring 120
Min, obtain warm mix Sulphur asphalt of the present invention（Numbering A-1）.Asphaltic nature and temperature in use are shown in Table 1.
（Three）Prepare warm mix Sulphur asphalt compound
Special asphalt stirred tank is heated to 150 DEG C of constant temperature in advance；Liaoyang andesite is gathered materials and is configured to grading and is
AC-10 gathers materials, gross mass 91kg, be heated to 150 DEG C it is standby；Weigh above-mentioned warm mix Sulphur asphalt（A-1）6.0kg, it is heated to
150 DEG C standby；Weigh miberal powder 3.0kg.Kettle to be mixed, gather materials, after asphalt temperature is constant, by it is above-mentioned gather materials, miberal powder adds together
Into stirred tank, stir 2 minutes；Then above-mentioned load weighted warm mix Sulphur asphalt is added in stirred tank, stirred 3 minutes,
Obtain warm mix Sulphur asphalt compound of the present invention.Warm mix Sulphur asphalt compound of the present invention is prepared into various compound test specimens simultaneously
Henchnmrk test is carried out, the results are shown in Table 2.
Embodiment 2
（One）Prepare warm-mixing agent
（1）Preparation and charging
Pad water below sweating ware ware plate.The sealing system of sweating ware and pressurized buffer tank and compressor are connected；In sweating ware
Pressure-reducing cushioning tank is installed and connects vavuum pump in bottom；Sweating ware chuck and removable coil pipe are connected with the circulatory system, by coil pipe
It is fixed on sweating ware；Using conduction oil as medium, start the heating function of the circulatory system, recycle oil is warming up to 94 DEG C.
Using the Tissuemat E of petrochina Jilin Petrochemical ethylene plant high density polyethylene device by-product as raw material（Property is the same as implementation
Example 1）, 94 DEG C of fusings are heated to, then addition accounts for the dibenzoyl peroxide of raw material weight 0.03%, is added after stirring
In sweating ware.
（2）Crystallization
Start the refrigerating function of the circulatory system, wax layer temperature is dropped to 80.0 DEG C with 2.5 DEG C/h rate of temperature fall.Close circulation
The refrigerating function of system.
（3）Heating-constant temperature sweating
Discharge sweating ware pad water.Sweating ware outlet connection intermediate storage tank（Ⅰ）To receive under wax；The sealing system on sweating ware top is installed
System；Start compressor and keep pressurized buffer pressure inside the tank stable in 1.1~1.3 atmospheric pressure（Gauge pressure）, under sweating ware ware plate
Side keeps normal pressure；Start circulation system function, wax layer temperature is increased to 85.0 DEG C with 2.5 DEG C/h heating rate；Stop
Compressor.
Start vavuum pump and keep pressure-reducing cushioning pressure inside the tank stable in -0.4~-0.6 atmospheric pressure（Gauge pressure）, in wax layer
Square air pressure keeps normal pressure；Continue to make wax layer temperature be increased to 90.0 DEG C of simultaneously constant temperature 4.0 hours with 2.5 DEG C/h heating rate, make
Solids fraction in wax layer is sufficiently separated with liquid composition.Stop vavuum pump, terminate sweating effort.
（4）Blowing
Sweating ware exports changing-over products pot, continues to raise the temperature of conduction oil to 110 DEG C, is taken out with fusing on wax, as pitch
Warm-mixing agent.
Asphalt warm-mix agent product yield is 42.2%（Relative to the Tissuemat E of material polyethylene by-product）, property：Drip melt
94.8 DEG C of point, 25 DEG C of dmm of needle penetration 6,55 DEG C of dmm of needle penetration 38.Sweating product is can be seen that from 25 DEG C and 55 DEG C of needle penetrations
Middle low melting point removes substantially.
（Two）Prepare warm mix Sulphur asphalt
Weigh 0.5kg above-mentioned warm-mixing agent（Ⅱ）, it is added to No. 90 oxygen of LIAOHE CRUDE that quality is 79.5kg, temperature is 110 DEG C
Change in pitch, stir 30min, obtain warm-mixed asphalt；Then 20kg sulphur is added in above-mentioned warm-mixed asphalt, stirred
40min, obtain warm mix Sulphur asphalt of the present invention（Numbering A-2）.Asphaltic nature and temperature in use are shown in Table 1.
（Three）Prepare warm mix Sulphur asphalt compound
Special asphalt stirred tank is heated to 120 DEG C of constant temperature in advance；Tieling basalt aggregate, which is configured to grading, is
AC-13's gathers materials, gross mass 95kg, be heated to 120 DEG C it is standby；Weigh above-mentioned warm mix Sulphur asphalt（A-2）4.0kg, heating
It is standby to 120 DEG C；Weigh miberal powder 1.0kg.Kettle to be mixed, gather materials, after asphalt temperature is constant, by it is above-mentioned gather materials, miberal powder adds together
It is added in stirred tank, stirs 2 minutes；Then above-mentioned load weighted warm mix Sulphur asphalt is added in stirred tank, stirs 3 points
Clock, obtain warm mix Sulphur asphalt compound of the present invention.Warm mix Sulphur asphalt compound of the present invention is prepared into various compound examinations
Part simultaneously carries out henchnmrk test, the results are shown in Table 2.
Comparative example 1
Weigh the Tissuemat E of polyethylene by-product（Property is shown in the sweating raw material of embodiment 1）0.5kg, be added to quality for 79.5kg,
Temperature is in 110 DEG C No. 90 oxidized asphalts of LIAOHE CRUDE, stirs 30min, obtains contrasting pitch；Then 20kg sulphur is added
Sulphur, 40min is stirred, obtain contrasting Sulphur asphalt（Numbering D-1）.Asphaltic nature and temperature in use are shown in Table 1.
Special asphalt stirred tank is heated to 120 DEG C of constant temperature in advance；Tieling basalt aggregate is configured to level
With gathering materials for AC-13, gross mass 95kg, be heated to 120 DEG C it is standby；Weigh above-mentioned contrast Sulphur asphalt（D-1）4.0kg
Be heated to 120 DEG C it is standby；Weigh miberal powder 1.0kg.Kettle to be mixed, gather materials, after asphalt temperature is constant, by it is above-mentioned gather materials, miberal powder one
Rise and be added in stirred tank, stir 2 minutes；Then by above-mentioned load weighted contrast Sulphur asphalt（D-1）It is added in stirred tank,
Stirring 3 minutes, obtain contrasting Sulphur asphalt compound.Contrast Sulphur asphalt compound is prepared into various compound test specimens to go forward side by side
Row henchnmrk test, the results are shown in Table 2.
The pitch of table 1. is with when property and temperature in use contrast
From table 1, the high temperature viscosity of warm mix Sulphur asphalt of the present invention all drips significantly lower than corresponding matrix pitch and contrast
Green grass or young crops, so that mix and forming temperature reduce by 20 DEG C ~ 25 DEG C.Warm mix Sulphur asphalt of the present invention and corresponding matrix pitch and right
Being compared than pitch, when needle penetration is essentially identical, softening point and 60 DEG C of viscosity are improved significantly, and 10 DEG C of ductilities significantly increase,
Illustrate that warm mix Sulphur asphalt of the present invention not only can reach warm mix effect, and it is all excellent in terms of high-temperature stability and low temperature ductility
In corresponding matrix pitch and common Sulphur asphalt.
Visible by the contrast of film experimental result, the warm mix Sulphur asphalt obtained using warm-mixing agent of the present invention is anti-ageing
Change performance significantly better than contrast pitch, improve the heat endurance of pitch, improved thermal ageing resistant performance.
The asphalt of table 2. contrasts with when property
Note：[1] JTG F40-2004《Standard specification for construction and acceptance of highway asphalt pavement》.
From table 2, the rut dynamic stability of warm mix Sulphur asphalt compound of the present invention significantly improves, girder bending failure
Strain also increases, and other indexs meet demand of technical standard.It is anti-to illustrate that warm mix Sulphur asphalt compound of the present invention not only increases
Rut performance, cryogenic property are also taken into account.
Claims (20)
1. a kind of warm mix Sulphur asphalt, it is characterised in that the pitch includes the component of following mass fraction：
33 ~ 79.5 parts of matrix pitch；
0.5 ~ 7 part of warm-mixing agent；
20 ~ 60 parts of sulphur；
Described warm-mixing agent is prepared using following methods：
（1）Charging：After the Tissuemat E raw material heating fusing of polyethylene by-product, oil-soluble decomposable asymmetric choice net is added thereto and produces gas
The organic substance of body, load sweatbox after stirring；
（2）Crystallization：Wax layer is cooled to 5 DEG C~30 DEG C below raw material melt drop temperature of cooling with 2.0 DEG C/h~4.0 DEG C/h speed
Final temperature；
（3）Heating-constant temperature sweating：Heated up with 1.5 DEG C/h~3.5 DEG C/h speed, wax layer reaches one section of predetermined temperature and constant temperature
Stop sweating after time, wax layer is forced air flow through in sweating effort；
（4）Blowing：Residue in sweatbox is released, as described warm-mixing agent.
2. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that described oil-soluble decomposable asymmetric choice net produces gas
Organic substance is selected from organic azo compound, sulfonyl hydrazines compound, organic nitroso compounds, organic peroxide and formed
One group of material.
3. according to the warm mix Sulphur asphalt described in claim 2, it is characterised in that described oil-soluble decomposable asymmetric choice net produces gas
Organic substance is organic azo compound and/or organic peroxide.
4. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that described oil-soluble decomposable asymmetric choice net produces gas
The addition of organic substance is the 0.01%~15.00% of raw material weight.
5. according to the warm mix Sulphur asphalt described in claim 4, it is characterised in that described oil-soluble decomposable asymmetric choice net produces gas
The addition of material is the 0.03%~8.00% of raw material weight.
6. according to the warm mix Sulphur asphalt described in claim 2, it is characterised in that described organic azo compound is selected from azo
One group of material that two different heptonitriles, azodiisobutyronitrile, azodicarbonamide and azo diisopropyl imidazoline hydrochloride are formed；Described sulphonyl
Hydrazine class compound is selected from one group of material that benzene sulfonyl hydrazide, unifor, 4,4 '-bis oxide (benzene sulfonyl hydrazide) are formed；It is described
Organic nitroso compounds be selected from dinitrosopentamethylene tetramine and/or N, N '-dimethyl N, N '-dinitroso neighbour benzene two
Formamide；Described organic peroxide be selected from dibenzoyl peroxide, dilauroyl peroxide, dicetyl peroxydicarbonate isopropyl ester and
One group of material that di-cyclohexylperoxy di-carbonate is formed.
7. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that step（2）Described in cooling final temperature
For 8 DEG C~20 DEG C below sweating raw material melt drop temperature.
8. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that step（3）Described in force air flow through
Wax layer, which uses, to be increased air pressure above wax layer and/or air pressure is reduced below wax layer, wax layer upper and lower is formed pressure differential and is realized,
Described pressure differential is 0.1~5.0 atmospheric pressure, preferably 0.2~2.0 atmospheric pressure.
9. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that step（3）Described in the predetermined temperature that heats up
For purpose product melt drop temperature -10 DEG C~purpose product melt drop temperature.
10. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that step（3）Described in time of constant temperature be
0.1~5.0 hour, preferably 1.0~5.0 hours.
11. according to the warm mix Sulphur asphalt described in claim 1, it is characterised in that step（3）Described in force air flow through
Wax layer is implemented initial stage in heating.
12. according to the warm mix Sulphur asphalt described in claim 8, it is characterised in that described forces air flow through wax layer use
Increase air pressure above wax layer to realize, apply the gauge of 0.2~2.0 atmospheric pressure above wax layer, and protected below wax layer
Hold as normal pressure.
13. according to the warm mix Sulphur asphalt described in claim 8, it is characterised in that described forces air flow through wax layer use
Reduce air pressure below wax layer to realize, air pressure keeps normal pressure above wax layer, and remains -0.2~-1.0 big below wax layer
The gauge of air pressure.
14. the preparation method of any described warm mix Sulphur asphalt of claim 1-13, including herein below：First by matrix pitch
110 DEG C ~ 140 DEG C are heated to, stirs and adds warm-mixing agent, adds sulphur, stirring.
15. according to the preparation method described in claim 14, it is characterised in that：Add warm-mixing agent after the stirring reaction time be 30 ~
60min, the stirring reaction time is 40 ~ 120min after adding sulphur.
A kind of 16. warm mix Sulphur asphalt compound, it is characterised in that in terms of compound gross mass, including following mass fraction
Component：Any 4.0 ~ 6.0 parts described of the warm mix Sulphur asphalt of claim 1-13,1.0 ~ 3.0 parts of miberal powder gather materials 91.0 ~ 95.0
Part.
17. according to the warm mix Sulphur asphalt compound described in claim 16, it is characterised in that described gathers materials selected from lime
Rock, basalt, andesite or granite at least one of gather materials.
18. according to the warm mix Sulphur asphalt compound described in claim 1, it is characterised in that described miberal powder is ground by ore
Form, wherein particle proportion of the particle diameter less than 0.075mm is more than 70% as mass fraction.
19. the preparation method of the warm mix Sulphur asphalt compound described in claim 17 or 18, comprises the following steps：
1. prepare warm mix Sulphur asphalt：Matrix pitch is first heated to 110 DEG C ~ 140 DEG C, stirs and adds warm-mixing agent, adds sulphur
Sulphur, stirring；
2. by stirred tank and gathering materials and being heated separately to 110 DEG C ~ 140 DEG C, it will gather materials, miberal powder while be added in stirred tank, stirring；
3. warm mix Sulphur asphalt is heated to molten condition, be added in stirred tank, with gathering materials, miberal powder mix, obtain institute
State warm mix Sulphur asphalt compound.
20. according to the preparation method described in claim 19, it is characterised in that：Step 1. it is middle addition warm-mixing agent after stirring reaction when
Between be 30 ~ 60min, add sulphur after the stirring reaction time be 40 ~ 120min.
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