CN107418231B - A kind of modified pitch that antiskid is durable and preparation method - Google Patents
A kind of modified pitch that antiskid is durable and preparation method Download PDFInfo
- Publication number
- CN107418231B CN107418231B CN201710712882.8A CN201710712882A CN107418231B CN 107418231 B CN107418231 B CN 107418231B CN 201710712882 A CN201710712882 A CN 201710712882A CN 107418231 B CN107418231 B CN 107418231B
- Authority
- CN
- China
- Prior art keywords
- parts
- pitch
- ketone
- antiskid
- ether
- 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.)
- Active
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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The present invention provides a kind of modified pitch that antiskid is durable and preparation methods to be prepared from the following raw materials based on parts by weight: pitch is 100 parts, and rare-earth tungstate is 10 parts, and polyether-ether-ketone is 15~30 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.The present invention is modified asphalt using high molecular material polyether-ether-ketone and negative thermal expansion material rare-earth tungstate, so that the modified pitch coefficient of expansion prepared becomes smaller, and there is excellent wear-resisting property, for pavement skid resistance condition and durability can be significantly improved after bituminous pavement.So that the asphalt summer prepared is not easy bellding, winter is not easy to crack, and wear-resisting property is good.
Description
Technical field
The invention belongs to pavement material fields, are related to modified pitch, and in particular to a kind of modified pitch that antiskid is durable and
Preparation method.
Background technique
Compared with other types road surface, bituminous pavement because having surfacing, seamless, with small vibration, low noise, put down by driving
Surely comfortably, it is widely used in the road construction in China the advantages that simple maintenance.But since asphalt material thermally expands
Coefficient ratio is larger, and under normal circumstances, temperature is every to rise 15 degree, and the volume of pitch will increase by 1%.The temperature on summer road surface is very high,
The volume of pitch will increase 3% or more, if the residual porosities of mixture are not enough to accommodate pitch, it may occur that bellding, it is serious to reduce
Pavement skid resistance condition；The pavement temperature in winter is lower, if pitch volume contraction under the action of low temperature is excessive, bituminous pavement meeting
Shrinkage cracking；Simultaneously as the attrition repeatedly of vehicular load can also make pavement skid resistance condition if road surface wearability is insufficient
It is greatly lowered.
It usually solves the above problems and mainly by the design of optimization road surface voidage and ensures pavement compaction intensity and close
Degree, and antiskid performance caused by solving bituminous pavement summer bellding by design composition and construction etc. and wearing away is not enough to
And the ability of cold cracking problem is limited, and the voidage excessive in design can bring purt to starch again, pit slot, passage,
The problems such as gathering around packet, therefore, the modification of pitch are necessary.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to, provide a kind of modified pitch that antiskid is durable and
Preparation method improves bituminous pavement and drips because of summer bellding with antiskid performance deficiency and winter problem of Cracking, raising caused by wearing away
The antiskid performance and durability on green road surface.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme:
A kind of modified pitch that antiskid is durable, including following raw material are made: pitch, rare-earth tungstate, polyether-ether-ketone and containing
Boric acid isophthalic poly(aryl ether ketone).
The present invention also has following distinguishing feature:
Based on parts by weight, be prepared from the following raw materials: pitch is 100 parts, and rare-earth tungstate is 10~25 parts, polyether-ether-ketone
It is 15~30 parts, boronic acid containing isophthalic poly(aryl ether ketone) is 2~6 parts.
Preferably, based on parts by weight, be prepared from the following raw materials: pitch is 100 parts, and rare-earth tungstate is 10 parts, polyethers
Ether ketone is 15~30 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
It is furthermore preferred that based on parts by weight, being prepared from the following raw materials: pitch is 100 parts, and rare-earth tungstate is 10 parts, is gathered
Ether ether ketone is 20 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
The rare-earth tungstate is Sc2W3O12, Lu2W3O12Or Y2W3O12。
The polyether-ether-ketone can be replaced using waste and old polyether-ether-ketone.
The structural formula of the boronic acid containing isophthalic poly(aryl ether ketone) is
In formula: x=0.20~0.25, y=0.15~0.20, z=0.13~0.15, t=0.40~0.60, m be greater than
Integer equal to 5.
Preferably, x=0.23, y=0.16, z=0.15, t=0.46, m=8.
The preparation method of the durable modified pitch of antiskid as described above sequentially includes the following steps:
Step 1 weighs pitch by material rate, and rare-earth tungstate is spare；
Polyether-ether-ketone is mixed with boronic acid containing isophthalic poly(aryl ether ketone), is crushed using Universalpulverizer by step 2, control mixing
The maximum particle diameter of object is not greater than 2.36mm；
Pitch is heated to 150~200 DEG C by step 3 in a kettle, and rare-earth tungstate is added to the drip after heating
In blueness, mixing speed be 60~120r/min, mixing time 5~10 minutes；
The polyether-ether-ketone crushed made from step 2 and the mixture of boronic acid containing isophthalic poly(aryl ether ketone) are added step 4
It in pitch after heating, is stirred under the stirring rate of 1000r/min, mixing time is 30~60 minutes, obtains antiskid
Durable modified pitch.
Compared with prior art, the present invention having the following technical effect that
(I) present invention using high molecular material polyether-ether-ketone and negative thermal expansion material rare-earth tungstate to asphalt into
Row is modified, so that the modified pitch coefficient of expansion prepared becomes smaller, and has excellent wear-resisting property, for after bituminous pavement
Pavement skid resistance condition and durability can be significantly improved.So that the asphalt summer prepared is not easy bellding, winter is not easy out
It splits, wear-resisting property is good；And rare-earth tungstate can generate reciprocation after mixing as a kind of inorganic filler and polyether-ether-ketone,
Improve polyether-ether-ketone wear-resisting property, and the hybrid particles under this action of coupling agents of boronic acid containing isophthalic poly(aryl ether ketone) with drip
Colloid in green colloid is mutually affine, forms a kind of stable space net structure, improves the stability of pitch, so that preparation
After pitch out is used for bituminous pavement, antiskid performance and durability are obviously improved.
(II) rare-earth tungstate in the present invention can be used as the wear-resisting property that a kind of inorganic filler significantly improves polyether-ether-ketone,
Improve durability of asphalt pavement.
(III) the boronic acid containing isophthalic poly(aryl ether ketone) in the present invention is remarkably improved polyether-ether-ketone as a kind of high-quality coupling agent
High-temperature behavior, and keep rare-earth tungstate and polyether-ether-ketone mixture and the colloid in pitch colloid mutually affine, form one kind
Stable space net structure, so that the Stability of Asphalt Concrete Pavement and durability prepared significantly increase.
(IV) modified pitch in the present invention effectively avoids pitch mixed for can suitably reduce voidage after bituminous pavement
Material Moisture Damage is closed, the durability of bituminous pavement is substantially increased.
(V) waste and old polyether-ether-ketone can be effectively treated in the present invention, be added into asphalt, can reduce making for pitch
With save the cost turns waste into wealth.
Explanation is further explained in detail to particular content of the invention with reference to embodiments.
Specific embodiment
In compliance with the above technical solution, specific embodiments of the present invention are given below, it should be noted that the present invention not office
It is limited to following specific embodiments, all equivalent transformations made on the basis of the technical solutions of the present application each falls within protection model of the invention
It encloses.
It should be noted that in following embodiments:
Pitch uses 90# matrix pitch, in practical applications, can be substituted as the case may be by other model pitches.
Polyether-ether-ketone can be replaced using waste and old polyether-ether-ketone.
The structural formula of boronic acid containing isophthalic poly(aryl ether ketone) is as follows:
In formula: x=0.20~0.25, y=0.15~0.20, z=0.13~0.15, t=0.40~0.60, m be greater than
Integer equal to 5.
Preferably, x=0.23, y=0.16, z=0.15, t=0.46, m=8.
The preparation process route of the compound are as follows: using 4,4- difluoro benzophenone and resorcinol as reactant, pass through
Nucleophilic displacement of fluorine polycondensation reaction, be made metaphenylene poly(aryl ether ketone) after with connection boric acid pinacol, [IrCl (COD)]2, the tertiary fourth of 4,4- bis-
The metaphenylene poly(aryl ether ketone) of boronic acid containing rouge is made in base -2,2- bipyridyl constant temperature in the tetrahydro full of nitrogen barks and mutters for 24 hours, finally will
The metaphenylene poly(aryl ether ketone) and sodium metaperiodate of boronic acid containing rouge stir in dioxane is made boronic acid containing isophthalic poly(aryl ether ketone).
Embodiment 1:
The present embodiment provides a kind of modified pitch that antiskid is durable and is prepared from the following raw materials based on parts by weight: pitch is
100 parts, rare-earth tungstate is 10 parts, and polyether-ether-ketone is 15 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
Rare-earth tungstate in the present embodiment is Sc2W3O12。
Polyether-ether-ketone in the present embodiment can be replaced using waste and old polyether-ether-ketone.
The preparation method of the durable modified pitch of the antiskid of the present embodiment, sequentially includes the following steps:
Step 1 weighs pitch by material rate, and rare-earth tungstate is spare；
Polyether-ether-ketone is mixed with boronic acid containing isophthalic poly(aryl ether ketone), is crushed using Universalpulverizer by step 2, control mixing
The maximum particle diameter of object is not greater than 2.36mm；
Pitch is heated to 150~200 DEG C by step 3 in a kettle, and rare-earth tungstate is added to the drip after heating
In blueness, mixing speed be 60~120r/min, mixing time 5~10 minutes；
The polyether-ether-ketone crushed made from step 2 and the mixture of boronic acid containing isophthalic poly(aryl ether ketone) are added step 4
It in pitch after heating, is stirred under the stirring rate of 1000r/min, mixing time is 30~60 minutes, obtains antiskid
Durable modified pitch.
Embodiment 2:
The present embodiment provides a kind of modified pitch that antiskid is durable and is prepared from the following raw materials based on parts by weight: pitch is
100 parts, rare-earth tungstate is 10 parts, and polyether-ether-ketone is 20 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
Rare-earth tungstate in the present embodiment is Sc2W3O12。
The preparation method of the durable modified pitch of the antiskid of the present embodiment is substantially the same manner as Example 1.
Embodiment 3:
The present embodiment provides a kind of modified pitch that antiskid is durable and is prepared from the following raw materials based on parts by weight: pitch is
100 parts, rare-earth tungstate is 10 parts, and polyether-ether-ketone is 30 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
Rare-earth tungstate in the present embodiment is Sc2W3O12。
The preparation method of the durable modified pitch of the antiskid of the present embodiment is substantially the same manner as Example 1.
Embodiment 4:
The present embodiment provides a kind of modified pitch that antiskid is durable and is prepared from the following raw materials based on parts by weight: pitch is
100 parts, rare-earth tungstate is 10 parts, and polyether-ether-ketone is 20 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
Rare-earth tungstate in the present embodiment is Lu2W3O12。
The preparation method of the durable modified pitch of the antiskid of the present embodiment is substantially the same manner as Example 1.
Embodiment 5:
The present embodiment provides a kind of modified pitch that antiskid is durable and is prepared from the following raw materials based on parts by weight: pitch is
100 parts, rare-earth tungstate is 10 parts, and polyether-ether-ketone is 20 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
Rare-earth tungstate in the present embodiment is Y2W3O12。
The preparation method of the durable modified pitch of the antiskid of the present embodiment is substantially the same manner as Example 1.
Comparative example 1:
This comparative example provides a kind of modified pitch, based on parts by weight, is prepared from the following raw materials: pitch is 100 parts, boracic
Sour isophthalic poly(aryl ether ketone) is 3 parts.
The preparation method of the modified pitch of this comparative example is substantially the same manner as Example 1.
Comparative example 2:
This comparative example provides a kind of modified pitch, based on parts by weight, is prepared from the following raw materials: pitch is 100 parts, rare earth
Tungstates is 10 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
Rare-earth tungstate in the present embodiment is Sc2W3O12。
The preparation method of the modified pitch of this comparative example is substantially the same manner as Example 1.
Comparative example 3:
This comparative example provides a kind of modified pitch, based on parts by weight, is prepared from the following raw materials: pitch is 100 parts, polyethers
Ether ketone is 20 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
The preparation method of the modified pitch of this comparative example is substantially the same manner as Example 1.
In order to verify pavement performance and the modified pitch thermal expansion coefficient variation, to present example 1~5 and
Comparative example carries out dependence test, and test result is as follows:
(1) pavement performance is tested:
The base of pitch is modified according to " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011)
The test of this pavement performance.
1 pitch three norms test result of table
According to table 1, pitch three norms are analyzed, for modified pitch needle penetration without too big variation, ductility and softening point are equal
The raising that increases is compared with plain asphalt, modified pitch thermal expansion coefficient is greatly lowered, in this way when temperature becomes
When change, pitch volume expansion, which has, significantly to be reduced, and is known that modified Bituminous stabilized increases in summary, is shown
Excellent pavement performance.
(2) antiskid performance test:
This experiment pitch uses the Kelamayi 90# matrix pitch, and coarse aggregate uses basalt, and fine aggregate is using clean day
Right river sand, filler are levigate limestone, and gradation SMA-13 prepares pitch mixing using the modified pitch in Examples 1 to 5
Material, number I~V, the asphalt for using the modified pitch in comparative example 1~3 to prepare are numbered as VI~VIII.Based on interior
Accelerating and loading experimental measures pavement skid resistance condition index under different number of loading, and test result is as follows:
2 asphalt antiskid performance laboratory experiment test result of table
According to table 2, comparison modified asphalt mixture I~V and comparative example VI~VIII is it is found that the two antiskid initial value phase
It is poor little, but modified asphalt mixture antiskid final value is greater than comparative example asphalt, and the antiskid performance rate of decay is small.Specifically
, modified asphalt mixture I~V and comparative example VI is compared it is found that the modified asphalt mixture antiskid performance rate of decay is obviously small
In comparative example VI, and antiskid final value is significantly greater than comparative example VI；Modified asphalt mixture I~V and comparative example VII compare it is found that
The modified asphalt mixture antiskid performance rate of decay is respectively less than comparative example VII, and antiskid final value is all larger than comparative example VII；It is modified
Asphalt I~V and comparative example VIII is compared it is found that the modified asphalt mixture antiskid performance rate of decay is respectively less than comparative example
VIII, and antiskid final value is all larger than comparative example VIII.The sequence of comparative example VI~VIII antiskid performance superiority-inferiority are as follows: VIII > VII >
VI.Therefore it may be concluded that modified pitch is used for bituminous pavement, which has good antiskid performance and durable
Property；And rare-earth tungstate and polyether-ether-ketone produce synergistic effect in modifying process, further improve the antiskid on road surface
Performance and durability.
Claims (8)
1. a kind of modified pitch that antiskid is durable, which is characterized in that based on parts by weight, be prepared from the following raw materials: pitch 100
Part, rare-earth tungstate is 10~25 parts, and polyether-ether-ketone is 15~30 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 2~6 parts.
2. the durable modified pitch of antiskid as described in claim 1, which is characterized in that based on parts by weight, by following raw material
Be made: pitch is 100 parts, and rare-earth tungstate is 10 parts, and polyether-ether-ketone is 15~30 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
3. the durable modified pitch of antiskid as claimed in claim 2, which is characterized in that based on parts by weight, by following raw material
Be made: pitch is 100 parts, and rare-earth tungstate is 10 parts, and polyether-ether-ketone is 20 parts, and boronic acid containing isophthalic poly(aryl ether ketone) is 3 parts.
4. the durable modified pitch of antiskid as described in claim 1, which is characterized in that the rare-earth tungstate is
Sc2W3O12, Lu2W3O12Or Y2W3O12。
5. the durable modified pitch of antiskid as described in claim 1, which is characterized in that the polyether-ether-ketone is using waste and old poly-
Ether ether ketone replacement.
6. the durable modified pitch of antiskid as described in claim 1, which is characterized in that the boronic acid containing isophthalic poly(aryl ether ketone)
Structural formula are as follows:
In formula: x=0.20~0.25, y=0.15~0.20, z=0.13~0.15, t=0.40~0.60, m are more than or equal to 5
Integer.
7. the durable modified pitch of antiskid as claimed in claim 6, which is characterized in that in formula: x=0.23, y=0.16, z=
0.15, t=0.46, m=8.
8. the preparation method of the durable modified pitch of antiskid as described in claim 1 to 7 any claim, feature exist
In sequentially including the following steps:
Step 1 weighs pitch by material rate, and rare-earth tungstate is spare；
Polyether-ether-ketone is mixed with boronic acid containing isophthalic poly(aryl ether ketone), is crushed using Universalpulverizer, control mixture by step 2
Maximum particle diameter is not greater than 2.36mm；
Pitch is heated to 150~200 DEG C by step 3 in a kettle, and rare-earth tungstate is added in the pitch after heating,
Mixing speed be 60~120r/min, mixing time 5~10 minutes；
Heating is added in the polyether-ether-ketone crushed made from step 2 and the mixture of boronic acid containing isophthalic poly(aryl ether ketone) by step 4
It in pitch afterwards, is stirred under the stirring rate of 1000r/min, mixing time is 30~60 minutes, and it is durable to obtain antiskid
Modified pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712882.8A CN107418231B (en) | 2017-08-18 | 2017-08-18 | A kind of modified pitch that antiskid is durable and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712882.8A CN107418231B (en) | 2017-08-18 | 2017-08-18 | A kind of modified pitch that antiskid is durable and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107418231A CN107418231A (en) | 2017-12-01 |
| CN107418231B true CN107418231B (en) | 2019-07-02 |
Family
ID=60434747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710712882.8A Active CN107418231B (en) | 2017-08-18 | 2017-08-18 | A kind of modified pitch that antiskid is durable and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107418231B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329704B (en) * | 2018-02-09 | 2020-10-23 | 山东星火科学技术研究院 | Durable rubber asphalt and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456591A (en) * | 2007-12-10 | 2009-06-17 | 深圳大学 | High purity and negative heat expansion rare-earth tungstate material and preparation thereof |
| CN102604399A (en) * | 2012-02-27 | 2012-07-25 | 哈尔滨工业大学 | Asphalt material, asphalt mixture comprising same and preparation methods of asphalt material and asphalt mixture |
| CN103013143A (en) * | 2012-12-13 | 2013-04-03 | 肖菁 | High-elasticity modulus fiber composite asphalt |
| CN104017325A (en) * | 2014-06-10 | 2014-09-03 | 吉林大学 | Polyaryletherketone borate-modified aluminum borate crystal whisker reinforced polyether-ether-ketone composite material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090054561A1 (en) * | 2007-08-20 | 2009-02-26 | Barnat James J | Polymer-binder composite and methods of making and using same |
-
2017
- 2017-08-18 CN CN201710712882.8A patent/CN107418231B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456591A (en) * | 2007-12-10 | 2009-06-17 | 深圳大学 | High purity and negative heat expansion rare-earth tungstate material and preparation thereof |
| CN102604399A (en) * | 2012-02-27 | 2012-07-25 | 哈尔滨工业大学 | Asphalt material, asphalt mixture comprising same and preparation methods of asphalt material and asphalt mixture |
| CN103013143A (en) * | 2012-12-13 | 2013-04-03 | 肖菁 | High-elasticity modulus fiber composite asphalt |
| CN104017325A (en) * | 2014-06-10 | 2014-09-03 | 吉林大学 | Polyaryletherketone borate-modified aluminum borate crystal whisker reinforced polyether-ether-ketone composite material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107418231A (en) | 2017-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103288392B (en) | Fiber-toughened cement-emulsified asphalt-based mixture and preparation method thereof | |
| CN104926233A (en) | High-RAP-content asphalt mixture formula and preparation method | |
| US8530365B2 (en) | Composition for improving the stability and operational performance and reducing the environmental impact of asphalt mixes | |
| CN106007491B (en) | Normal-temperature regeneration asphalt and preparation method thereof | |
| CN101215123A (en) | Multi-component fibre composite asphalt concrete and preparing method thereof | |
| CN105802041B (en) | A kind of bituminous pavement repairing material and preparation method thereof | |
| CN107082591B (en) | Paving material for municipal construction and building engineering and design method thereof | |
| CN107188461A (en) | Inspire confidence in the preparation method of basalt fibre water-permeating pitch mixed material in a kind of incorporation North America | |
| CN109180071B (en) | High-performance cold-mix mixture for road surface layer and preparation method thereof | |
| CN109534724A (en) | A kind of High Modulus Asphalt Mixture and preparation method thereof modified based on high ash content rock asphalt | |
| CN107188460A (en) | A kind of preparation method for mixing the asphalts of basalt fibre OGFC 13 that are chopped | |
| CN107418231B (en) | A kind of modified pitch that antiskid is durable and preparation method | |
| CN114644493A (en) | High-performance water-based epoxy modified emulsified asphalt micro-surfacing material and preparation method thereof | |
| CN113698138B (en) | high-RAP-content regeneration mixture and preparation method and application thereof | |
| CN107265926A (en) | Inspire confidence in basalt fibre water-permeating pitch mixed material in one kind incorporation North America | |
| CN111234540A (en) | Low-temperature-resistant nano modified asphalt and preparation method thereof | |
| CN110396300A (en) | A kind of nano-compound modified pitch and preparation method thereof | |
| CN110372262A (en) | A method of precast curb is prepared using bituminous pavement top milling material regeneration | |
| CN106587732A (en) | Grout injection type waterproof high-viscoelasticity modified asphalt pavement mixture and preparation method thereof | |
| CN108424661B (en) | Composite modified emulsified asphalt with excellent anti-stripping performance and preparation method thereof | |
| CN110387130A (en) | A kind of preparation method of rubber powder asphalt | |
| CN109293281A (en) | A kind of modified asphalt mixture and preparation method thereof | |
| CN112745062A (en) | Composite fiber modified asphalt mixture with excellent performance and preparation method thereof | |
| CN101445661A (en) | Anti-rutting modified asphalt material for road and preparation method thereof | |
| CN111548056B (en) | Acid rain corrosion resistant asphalt mixture and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |