CN107652700A - The preparation method of durability modified pitch - Google Patents
The preparation method of durability modified pitch Download PDFInfo
- Publication number
- CN107652700A CN107652700A CN201711039690.1A CN201711039690A CN107652700A CN 107652700 A CN107652700 A CN 107652700A CN 201711039690 A CN201711039690 A CN 201711039690A CN 107652700 A CN107652700 A CN 107652700A
- Authority
- CN
- China
- Prior art keywords
- montmorillonite
- modified pitch
- pitch
- preparation
- durability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
A kind of preparation method of durability modified pitch comprises the following steps：The organic-treating of montmorillonite, montmorillonite and intercalator are poured into flask together, dispersant is added into flask to be disperseed, then scattered montmorillonite is stirred and filtered, montmorillonite dispersions are obtained, the organic-treating that then with deionized water montmorillonite dispersions are carried out with montmorillonite after washing is dried is completed；SBS is mixed with pitch, the SBS modified pitch melted, montmorillonite, titanium dioxide into the SBS modified pitch of melting after addition organic-treating, and stir and obtain mixture, then mixture is placed in agitator and stirred, it is 140 DEG C~160 DEG C that it, which stirs the temperature of environment, and durability modified pitch is obtained after stirring.The present invention is substituted into durability modified pitch prepared by nano material using titanium dioxide and is used for road surfacing, the ageing resistance on road surface etc. can be strengthened, the organic-treating of montmorillonite and the addition design cost ratio of elastomer are relatively low in preparation process of the invention.
Description
Technical field：
The present invention relates to technical field prepared by modified pitch, more particularly to a kind of preparation side of durability modified pitch
Method.
Background technology：
Pitch is widely used in field of civil engineering and field of road, and in field of civil engineering, pitch mainly should
For roofing, the waterproof of ground underground structure and timber, the anti-corrosion of steel, in field of road, pitch is widely used in
The cementing material of pavement structure.
With the development of the society, many changes, the magnitude of traffic flow and traveling frequency sharp increase occur for highroad and road,
The axle of freight is continuously increased again, and road generally carries out divided lane one-way traffic, it is desirable to which the use of pitch can be improved further
The ability of Rut resistance under road surface resistance to flow, i.e. high temperature, flexible and elasticity is improved, i.e., the ability of cracking resistance under low temperature, is improved resistance to
Abrasion ability and increase the service life.Modern building generally uses large-span prestressed roof boarding, it is desirable to which pitch uses energy
Roof waterpoof material is enough set to adapt to big displacement, more tolerant to harsh high/low temperature weather conditions, durability is more preferable, there is tack, side
Just construct, reduce maintenance load.
For the demand, prior art has carried out performance improvement to pitch, added into pitch different modifying agent with
Meet different bitumen construction demands.But in view of modified material price is generally higher than the price of common petroleum pitch, user
Material engineering performance not yet can fully be held, modified pitch increase of production is slow.
The increase of road traffic car amount at present so that the loading capacity of road greatly increases, pitch in use by
Influence to traffic loading and heat, light, water etc. easily produces aging, for the factor for causing ageing of asphalt, pitch it is old
Change is broadly divided into two kinds of forms, and one kind is heat ageing, and another kind is light aging, and for ageing process, the aging of pitch is main
The long-term thermo-oxidative ageing and ultraviolet light and aging during short-term thermo-oxidative ageing and use including mixing and stirring, in paving process.Pitch
Thermo-oxidative ageing and ultraviolet light and aging all pitch can be made to be hardened and become fragile, the performance of pitch is reduced, so as to shorten asphalt road
The service life in face.Therefore, in order to improve the use of the modified pitch of the durability of pitch and the high cost of reduction, research and development department is needed
A kind of preparation method of new durability modified pitch.
The content of the invention：
In view of this, it is necessary to which a kind of preparation method of durability modified pitch is provided.
A kind of preparation method of durability modified pitch, comprises the following steps：
Step 1, the organic-treating of montmorillonite, montmorillonite and intercalator are poured into flask together, added into flask
Dispersant is disperseed, and then takes out scattered montmorillonite after being stirred 3 hours under temperature is 75 DEG C~85 DEG C of constant temperature
Filter, obtains montmorillonite dispersions, then montmorillonite dispersions is washed with deionized water, AgNO is used after washing3Solution
Detection then proves montmorillonite dispersions without chlorion without precipitation, in temperature is 80 DEG C~100 DEG C by gained montmorillonite dispersions
It is dried in vacuo under environment, the organic-treating of montmorillonite is completed；
Step 2, the preparation of modified pitch, SBS is mixed with pitch, the SBS modified pitch melted, to melting
Montmorillonite, titanium dioxide in SBS modified pitch after addition organic-treating, and stir and obtain mixture, then mixture is put
Put and stirred in agitator, it is 140 DEG C~160 DEG C that it, which stirs the temperature of environment, and durability modified pitch is obtained after stirring.
In the step of preparation method of above-mentioned durability modified pitch one, 500ml is poured into montmorillonite and intercalator together
Conical flask in, the dispersant that 120ml is added into flask is disperseed, wherein, calculated according to the weight of montmorillonite and CEC
The total amount of intercalator.
It by water and ether according to mass ratio is 1 that above-mentioned dispersant, which is,：1 dispersant mixed.
In the step of preparation method of above-mentioned durability modified pitch one, scattered montmorillonite is 80 DEG C of constant temperature bars in temperature
Filtered after being stirred 3 hours under part, obtain montmorillonite dispersions, then montmorillonite dispersions are washed with deionized water, washed
AgNO is used after washing3Solution detection then proves montmorillonite dispersions without chlorion, by gained montmorillonite dispersions in temperature without precipitation
Spend to be dried in vacuo in the environment of 90 DEG C, the organic-treating of montmorillonite is completed.
Above-mentioned intercalator used is organic intercalation agent, is hexadecyltrimethylammonium chloride.
In the step of preparation method of above-mentioned durability modified pitch two, SBS incorporation is the 5% of pitch weight, is added
Montmorillonite after the organic-treating entered is the 4% of pitch weight, and titanium dioxide is the 4% of pitch weight.
In the step of preparation method of above-mentioned durability modified pitch two, added into the SBS modified pitch of melting organic
After montmorillonite, titanium dioxide after change processing, quick stirring 1.5h is stirred under 4500r/min rotating speed and obtains mixture, then
Mixture is placed in agitator again and stirred, it is 150 DEG C that it, which stirs the temperature of environment, and durability is obtained after stirring and is modified drip
It is blue or green.
By the present invention, a kind of durability modified pitch can be prepared, the present invention is that one kind reasonably substitutes titanium dioxide
The method of the nano nonmetal oxide material production durability modified pitch of prior art, titanium dioxide main component is titanium dioxide
The Chinese white of titanium, scientific name are titanium dioxide, molecular formula TiO2It is a kind of polycrystalline compounds, its particle is in regularly arranged, tool
There is grid system, the relative density of titanium dioxide is minimum, and in conventional Chinese white, the relative density of titanium dioxide is minimum,
In the Chinese white of equal quality, the largest surface area of titanium dioxide, pigment volume concentration highest.Titanium dioxide is considered as the current world
A kind of best Chinese white of upper performance, is widely used in coating, plastics, papermaking, printing-ink, chemical fibre, rubber, cosmetics etc.
Industry.Titanium dioxide is ground fine powder by the present invention, is added in the preparation of modified pitch, has been createed a kind of new use of titanium dioxide
On the way, the price of titanium dioxide, so titanium dioxide is applied in the preparation of modified pitch, reduces compared to nano material than less expensive
The preparation cost of pitch.The durability modified pitch for preparing of the present invention is used for road surfacing, can strengthen the crack resistance on road surface with
Ageing resistance etc., and the organic-treating of montmorillonite and the addition design cost of elastomer compare in the preparation process of the present invention
It is low.
Figure of description：
Fig. 1 is the penetration index curve map of different pitches.
Fig. 2 is the ageing index curve map of different pitches.
In figure：Penetration index y-axis, Degree of Ageing index x-axis.
Embodiment：
This application provides the preparation method of three kinds of preferable modified pitch.
Embodiment one, the organic-treating of montmorillonite, a certain amount of montmorillonite and intercalator are poured into 500ml's together
In conical flask, the dispersant that 120ml is added into flask is disperseed, and is then 75 DEG C in temperature by scattered montmorillonite
Filtered after being stirred 3 hours under constant temperature, obtain montmorillonite dispersions, then montmorillonite dispersions are washed with deionized water
Wash, AgNO is used after washing3Solution detection then proves that without chlorion, gained montmorillonite is disperseed for montmorillonite dispersions without precipitation
Liquid is dried in vacuo in the environment of being 80 DEG C in temperature, and the organic-treating of montmorillonite is completed；
The preparation of modified pitch, SBS is mixed with pitch, the SBS modified pitch melted, be modified to the SBS of melting
The montmorillonite after organic-treating is added in pitch, after titanium dioxide, quick stirring 1.5h is stirred under 4500r/min rotating speed and is obtained
To mixture, then mixture is placed in agitator again and stirred, it is 140 DEG C that it, which stirs the temperature of environment, is obtained after stirring
Durability modified pitch.Wherein, SBS incorporation is the 5% of pitch weight, and the montmorillonite after the organic-treating of addition is drip
The 4% of blue or green weight, titanium dioxide are the 4% of pitch weight.
Embodiment two, the organic-treating of montmorillonite, montmorillonite and intercalator are poured into 500ml conical flask together
In, the dispersant that 120ml is added into flask is disperseed, then by scattered montmorillonite in the constant temperature that temperature is 85 DEG C
Lower stirring filters after 3 hours, obtains montmorillonite dispersions, then montmorillonite dispersions are washed with deionized water, washs
AgNO is used afterwards3Solution detection then proves montmorillonite dispersions without chlorion, by gained montmorillonite dispersions in temperature without precipitation
To be dried in vacuo in the environment of 100 DEG C, the organic-treating of montmorillonite is completed；
The preparation of modified pitch, SBS is mixed with pitch, the SBS modified pitch melted, be modified to the SBS of melting
The montmorillonite after organic-treating is added in pitch, after titanium dioxide, quick stirring 1.5h is stirred under 4500r/min rotating speed and is obtained
To mixture, then mixture is placed in agitator again and stirred, it is 160 DEG C that it, which stirs the temperature of environment, is obtained after stirring
Durability modified pitch.Wherein, SBS incorporation is the 5% of pitch weight, and the montmorillonite after the organic-treating of addition is drip
The 4% of blue or green weight, titanium dioxide are the 4% of pitch weight.
Embodiment three, the organic-treating of montmorillonite, montmorillonite and intercalator are poured into 500ml conical flask together
In, the dispersant that 120ml is added into flask is disperseed, then by scattered montmorillonite in the constant temperature that temperature is 80 DEG C
Lower stirring filters after 3 hours, obtains montmorillonite dispersions, then montmorillonite dispersions are washed with deionized water, washs
AgNO is used afterwards3Solution detection then proves montmorillonite dispersions without chlorion, by gained montmorillonite dispersions in temperature without precipitation
To be dried in vacuo in the environment of 90 DEG C, the organic-treating of montmorillonite is completed；
The preparation of modified pitch, SBS is mixed with pitch, the SBS modified pitch melted, be modified to the SBS of melting
The montmorillonite after organic-treating is added in pitch, after titanium dioxide, quick stirring 1.5h is stirred under 4500r/min rotating speed and is obtained
To mixture, then mixture is placed in agitator again and stirred, it is 140 DEG C that it, which stirs the temperature of environment, is obtained after stirring
Durability modified pitch.Wherein, SBS incorporation is the 5% of pitch weight, and the montmorillonite after the organic-treating of addition is drip
The 4% of blue or green weight, titanium dioxide are the 4% of pitch weight.
It by water and ether according to mass ratio is 1 that dispersant in above-mentioned embodiment one, two, three, which is,：1 point mixed
Powder, intercalator are organic intercalation agent, are hexadecyltrimethylammonium chloride.The determination of intercalator be according to montmorillonite weight and
The total amount that CEC calculates intercalator determines.
In above-mentioned three kinds of embodiments, first, the montmorillonite content of fixed optimum organic processing is asphalt quality
4%, it is spiked into SBS modified pitch, contents of the SBS in pitch is 5%, then adds 2%, the 4% of asphalt quality respectively
With 6% nano titanium oxide, after testing the penetration index of the pitch and ageing index be improved significantly, wherein nanometer
When titanium dioxide volume is 4%, the penetration index of pitch is up to 0.12, the ageing index minimum 0.19 of pitch.
Above-mentioned nano titanium oxide is changed to titanium dioxide, wherein, titanium dioxide is the levigate powder processed again.Then,
2%, 4% and 6% titanium dioxide of pitch weight is separately added into, the penetration index of the pitch and ageing index compare after testing
Protobitumen significantly improves, but lower slightly compared to nano titanium oxide.But, it is contemplated that titanium dioxide is economic and practical, and material source enriches, simultaneously
Premise with resource circulation utilization, titanium dioxide are widely used in house decoration etc., therefore, have had been provided with very high practical value
And DEVELOPMENT PROSPECT.
Claims (7)
- A kind of 1. preparation method of durability modified pitch, it is characterised in that：The preparation method of durability modified pitch include with Lower step：Step 1, the organic-treating of montmorillonite, montmorillonite and intercalator are poured into flask together, added into flask scattered Agent is disperseed, and then scattered montmorillonite is filtered after being stirred 3 hours under temperature is 75 DEG C~85 DEG C of constant temperature, is obtained To montmorillonite dispersions, then montmorillonite dispersions are washed with deionized water, AgNO is used after washing3Solution detects nothing Precipitation, then montmorillonite dispersions are proved without chlorion, by gained montmorillonite dispersions in the environment of temperature is 80 DEG C~100 DEG C Vacuum drying, the organic-treating of montmorillonite are completed；Step 2, the preparation of modified pitch, SBS is mixed with pitch, the SBS modified pitch melted, changed to the SBS of melting Property pitch in add organic-treating after montmorillonite, titanium dioxide, and stir obtain mixture, then mixture is placed on and stirred Mix in device and stir, it is 140 DEG C~160 DEG C that it, which stirs the temperature of environment, and durability modified pitch is obtained after stirring.
- 2. the preparation method of durability modified pitch as claimed in claim 1, it is characterised in that：Above-mentioned durability modified pitch Preparation method the step of one in, montmorillonite and intercalator are poured into 500ml conical flask together, added into flask 120ml dispersant is disperseed, wherein, according to the weight of montmorillonite and the total amount of CEC calculating intercalators.
- 3. the preparation method of durability modified pitch as claimed in claim 1 or 2, it is characterised in that：Above-mentioned dispersant be by Water and ether are 1 according to mass ratio：1 dispersant mixed.
- 4. the preparation method of durability modified pitch as claimed in claim 3, it is characterised in that：Above-mentioned durability modified pitch Preparation method the step of one in, scattered montmorillonite filters after being stirred 3 hours under temperature is 80 DEG C of constant temperatures, is covered Native dispersion liquid is taken off, then montmorillonite dispersions are washed with deionized water, AgNO is used after washing3Solution detection is without heavy Form sediment, then prove montmorillonite dispersions without chlorion, be dried in vacuo in the environment of being 90 DEG C in temperature by gained montmorillonite dispersions, The organic-treating of montmorillonite is completed.
- 5. the preparation method of durability modified pitch as claimed in claim 4, it is characterised in that：Above-mentioned intercalator used is Organic intercalation agent, it is hexadecyltrimethylammonium chloride.
- 6. the preparation method of durability modified pitch as claimed in claim 1, it is characterised in that：Above-mentioned durability modified pitch Preparation method the step of two in, SBS incorporation is the 5% of pitch weight, and the montmorillonite after the organic-treating of addition is The 4% of pitch weight, titanium dioxide are the 4% of pitch weight.
- 7. the preparation method of durability modified pitch as claimed in claim 6, it is characterised in that：Above-mentioned durability modified pitch Preparation method the step of two in, the montmorillonite that is added into the SBS modified pitch of melting after organic-treating, after titanium dioxide, Quick stirring 1.5h is stirred under 4500r/mi n rotating speed and obtains mixture, then mixture is placed in agitator again and stirred Mix, it is 150 DEG C that it, which stirs the temperature of environment, and durability modified pitch is obtained after stirring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711039690.1A CN107652700A (en) | 2017-10-31 | 2017-10-31 | The preparation method of durability modified pitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711039690.1A CN107652700A (en) | 2017-10-31 | 2017-10-31 | The preparation method of durability modified pitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107652700A true CN107652700A (en) | 2018-02-02 |
Family
ID=61095750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711039690.1A Pending CN107652700A (en) | 2017-10-31 | 2017-10-31 | The preparation method of durability modified pitch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107652700A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108912702A (en) * | 2018-07-27 | 2018-11-30 | 四川高路道路新型材料研发有限公司 | A kind of Modified coloured asphalt cementitious matter and preparation method thereof |
| CN109337391A (en) * | 2018-09-27 | 2019-02-15 | 武汉理工大学 | A kind of preparation method that the nano montmorillonite modified pitch that organises is blended |
| CN111647279A (en) * | 2020-06-22 | 2020-09-11 | 长沙理工大学 | Aging-resistant functionalized montmorillonite modified asphalt and preparation method thereof |
| CN112094505A (en) * | 2020-11-04 | 2020-12-18 | 佛山市交通科技有限公司 | SBS modified asphalt regenerant and preparation method thereof |
| CN115615909A (en) * | 2022-09-22 | 2023-01-17 | 湖南大学 | Indoor aging simulation method based on aging characteristics of medium-sized surface layer materials on asphalt pavement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189456A (en) * | 2017-06-21 | 2017-09-22 | 长安大学 | A kind of ageing-resistant nano organic covers the preparation method of de- modified pitch |
-
2017
- 2017-10-31 CN CN201711039690.1A patent/CN107652700A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107189456A (en) * | 2017-06-21 | 2017-09-22 | 长安大学 | A kind of ageing-resistant nano organic covers the preparation method of de- modified pitch |
Non-Patent Citations (3)
| Title |
|---|
| 余剑英等: ""有机化蒙脱土对SBS改性沥青热氧老化性能的影响""", 《武汉理工大学学报》 * |
| 杨群等: ""TiO2改性沥青分散性与抗老化性能"", 《同济大学学报（自然科学版）》 * |
| 欧育湘等: "《阻燃塑料手册》", 31 January 2008, 国防工业出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108912702A (en) * | 2018-07-27 | 2018-11-30 | 四川高路道路新型材料研发有限公司 | A kind of Modified coloured asphalt cementitious matter and preparation method thereof |
| CN109337391A (en) * | 2018-09-27 | 2019-02-15 | 武汉理工大学 | A kind of preparation method that the nano montmorillonite modified pitch that organises is blended |
| CN111647279A (en) * | 2020-06-22 | 2020-09-11 | 长沙理工大学 | Aging-resistant functionalized montmorillonite modified asphalt and preparation method thereof |
| CN112094505A (en) * | 2020-11-04 | 2020-12-18 | 佛山市交通科技有限公司 | SBS modified asphalt regenerant and preparation method thereof |
| CN112094505B (en) * | 2020-11-04 | 2021-06-11 | 佛山市交通科技有限公司 | SBS modified asphalt regenerant and preparation method thereof |
| CN115615909A (en) * | 2022-09-22 | 2023-01-17 | 湖南大学 | Indoor aging simulation method based on aging characteristics of medium-sized surface layer materials on asphalt pavement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107652700A (en) | The preparation method of durability modified pitch | |
| CN100577736C (en) | Asphalt pavement conditioning curing agent and preparation method thereof | |
| CN104031397B (en) | A kind of regeneration epoxy asphalt road surface and preparation method thereof | |
| CN105439496A (en) | A water-borne epoxy resin-emulsified bitumen micro-surfacing mixture and a preparing method thereof | |
| CN101851426B (en) | High-strength asphalt modifier for cast asphalt concrete and preparation method thereof | |
| Qian et al. | Effects of surface modified phosphate slag powder on performance of asphalt and asphalt mixture | |
| CN105907114A (en) | Composite asphalt cold supplementing liquid and preparing method | |
| CN107189456A (en) | A kind of ageing-resistant nano organic covers the preparation method of de- modified pitch | |
| CN109437703A (en) | A kind of bituminous concrete filler and bituminous concrete | |
| CN108947328A (en) | A kind of Steel slag permeable asphalt mixture based on the modified high-viscosity asphalt of shoddy | |
| CN104449555A (en) | Waterborne epoxy modified second order reaction type waterproof binding material and preparation method | |
| CN107815131A (en) | A kind of heat regeneration asphalt mixture and preparation method thereof | |
| CN107629471A (en) | A kind of nano-titanium dioxide modified emulsified asphalt and preparation method | |
| CN110372262A (en) | A method of precast curb is prepared using bituminous pavement top milling material regeneration | |
| CN107265926A (en) | Inspire confidence in basalt fibre water-permeating pitch mixed material in one kind incorporation North America | |
| CN110396300A (en) | A kind of nano-compound modified pitch and preparation method thereof | |
| CN105062105A (en) | Heat-resistant glass fiber asphalt shingle basic material and preparation method and application thereof | |
| CN101767958A (en) | High-performance light-weight epoxy asphalt concrete and preparation method thereof | |
| CN102453334B (en) | Inorganic nanoparticle modified emulsified asphalt and preparation method thereof | |
| CN108795076A (en) | A kind of preparation method of emulsified asphalt cementitious matter | |
| CN103936314B (en) | The organically-modified active mineral of response type, gap gradation asphalt and preparation method thereof | |
| CN106380873A (en) | New reclaimed asphalt and preparation method thereof | |
| CN107556763A (en) | A kind of preparation method of high intensity anti-rutting asphalt | |
| CN110054438B (en) | High-performance modified asphalt, preparation method thereof and asphalt concrete | |
| CN106800697A (en) | A kind of highway asphalt additive and its preparation technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180202 |