CN106928733A - One kind solution crosslinked foaming EVA modified pitch and preparation method thereof - Google Patents
One kind solution crosslinked foaming EVA modified pitch and preparation method thereof Download PDFInfo
- Publication number
- CN106928733A CN106928733A CN201710277646.8A CN201710277646A CN106928733A CN 106928733 A CN106928733 A CN 106928733A CN 201710277646 A CN201710277646 A CN 201710277646A CN 106928733 A CN106928733 A CN 106928733A
- Authority
- CN
- China
- Prior art keywords
- foaming eva
- pitch
- eva
- crosslinked foaming
- solution
- 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.)
- Granted
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- 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)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to modified asphalt technology field, and in particular to one kind solution crosslinked foaming EVA modified pitch and preparation method thereof.The each group of the solution crosslinked foaming EVA modified pitch is divided into：Pitch 88wt%~95wt%, solution crosslinked foaming EVA modifying agent 5wt%~12wt%；The each group of the solution crosslinked foaming EVA modifying agent is divided into：Foaming EVA 80wt%~90wt%, steel-making slag powder 10wt%~20wt%.The present invention destroys the cross-linked structure of foaming EVA by Mechanochemistry, it is ground into fine particle and then can be dispersed in pitch, improvement of the raising modifying agent to asphalt performance；The present invention, as asphalt modifier, not only reduces the production cost of modified pitch using solution crosslinked foaming EVA, improves the high temperature performance of pitch, extends the service life of bituminous paving, and solve the problem that discarded crosslinked foaming EVA is difficult to recycle.
Description
Technical field
The invention belongs to modified asphalt technology field, and in particular to one kind solution crosslinked foaming EVA modified pitch and its preparation
Method.
Background technology
Bituminous paving has turned into the first-selected road surface types of high-grade highway with its excellent pavement performance.Due to plain asphalt
Softening point it is low, low temperature extensibility is poor, elastic recovery rate is small, be used as bituminous concrete cementitious matter be easily caused road surface appearance
The diseases such as rut, crack, can not meet the construction demand of high-grade highway.In order to improve the performance of bituminous paving, gather
Polymer modified pitch is widely used.Can be used as the polymer of asphalt modifier mainly include thermoplastic elastomer (TPE), rubber and
Plastics etc., and widely using with macromolecular material, can all produce substantial amounts of waste plastic and rubber every year.Using discarded poly-
Compound is modified to pitch, on the one hand can reduce the cost of modified pitch, is on the other hand conducive to returning for waste polymer
Receive and recycle.
There is good delaying by ethylene-vinyl acetate copolymer (EVA) expanded material obtained in moulded from foam technique
The advantages of punching, antidetonation, heat-insulated, moistureproof, resist chemical, it is widely used in the systems such as production sound insulation, vibration damping, insulation, toy, sport footwear
Product.During production foaming EVA products, being limited by product shape and size can produce substantial amounts of discarded leftover pieces.If
The discarded leftover pieces of foaming EVA are used for asphalt modification, the performance for improving pitch is not only improved, environmental protection and saving are conducive to again
Resource.However, because foaming EVA has formd lightly crosslinked structure, it is difficult to be ground into fine particle, and use it for pitch and change
Property, because its molecular weight is big, creeping is poor, it is impossible to which dispersed in pitch, the lifting to asphalt performance is extremely limited, therefore mesh
Preceding foaming EVA still cannot function as asphalt modifier and use.
The content of the invention
The present invention is in view of the shortcomings of the prior art, it is therefore intended that provide a kind of solution crosslinked foaming EVA modified pitch and its system
Preparation Method.
For achieving the above object, the technical solution adopted by the present invention is：
One kind solution crosslinked foaming EVA modified pitch, conciliates crosslinked EVA modifying agent and constitutes by pitch, and each raw material components press matter
Measuring percentages is：Pitch 88%~95%, solution crosslinked foaming EVA modifying agent 5%~12%；The solution crosslinked foaming EVA changes
Property agent be to prepare gained through power chemistry solution crosslinking by foam EVA and steel-making slag powder.
In such scheme, each component of the solution crosslinked foaming EVA modifying agent is by mass percentage：Foaming
EVA80%~90%, steel-making slag powder 10%~20%.
In such scheme, the foaming EVA is the discarded leftover pieces of generation during production foaming EVA products.
In such scheme, the fineness of the steel-making slag powder is 100~200 mesh.
In such scheme, the preparation method of the solution crosslinked foaming EVA modifying agent is：Foaming EVA, steel-making slag powder are added to
Power chemistry solution crosslinking is carried out in banbury, after power chemistry solution crosslinking terminates, gained blend is crushed, is sieved, be obtained thin
The solution crosslinked foaming EVA modifying agent spent more than 40 mesh.
In such scheme, the technique of the power chemistry solution crosslinking is：The temperature setting of banbury is 170 DEG C, and rotating speed is
30r/min, the time for solving crosslinking is 20~25min.
In such scheme, the pitch is bi tumenf orr oad, and its needle penetration is 60~120dmm, and softening point is 45~50
℃。
The preparation method of above-mentioned solution crosslinked foaming EVA modified pitch, comprises the following steps：
(1) choose pitch by each group distribution ratio and conciliate crosslinked foaming EVA modifying agent；
(2) pitch is heated to 170~180 DEG C, starts high shear agitation machine, be added thereto to solution crosslinked foaming EVA
Modifying agent, keeping temperature is 170~180 DEG C, is stirred 60 minutes under the rotating speed of 5000rpm, prepares solution crosslinked foaming EVA
Modified pitch.
Beneficial effects of the present invention：
(1) present invention carries out power chemistry solution crosslinking after mixing with foaming EVA using steel-making slag powder, and steel-making slag powder is handed in power chemistry solution
Can play a part of to provide local shear forces during connection, effectively improve the solution cross-linking efficiency and solution crosslinking degree of foaming EVA；
Simultaneously steel-making slag powder addition, make solution crosslinked EVA be not only easy to crush and will not be inter-adhesive, solve understanding crosslinked EVA be difficult to crush
With the problem that can not form fine particle shape modifying agent, further, since steel-making slag powder is by calcium, iron, silicon, magnesium and a small amount of aluminium, manganese, phosphorus
Deng oxide composition, containing the basic component such as free calcium oxide and fluor-apatite, therefore, in solution crosslinked foaming EVA modified pitch
With hot mixing of gathering materials for compound during, steel-making slag powder can improve solution crosslinked foaming EVA modified pitch and the adhesiveness gathered materials,
So as to improve the anti-water damage property of bituminous paving；
(2) present invention carries out solution crosslinking using banbury to foaming EVA, and the friendship of foaming EVA is destroyed by Mechanochemistry
It is coupled structure, it is crushed and form fine particle, and then can be dispersed in pitch, modifying agent is effectively improved to pitch
The improvement of performance；
(3) present invention not only reduces being produced into for modified pitch using solution crosslinked foaming EVA as asphalt modifier
This, effectively increases the high temperature performance of pitch, is conducive to extending the service life of bituminous paving, and solves discarded crosslinking
Foaming EVA is difficult to the problem for recycling.
Brief description of the drawings
Fig. 1 is the solution crosslinked foaming EVA modifying agent pictorial diagrams prepared by the present invention.
Fig. 2 is solution crosslinked foaming EVA pictorial diagrams after crushed described in comparative example.
Specific embodiment
For a better understanding of the present invention, it is with reference to the embodiment content that the present invention is furture elucidated but of the invention
Content is not limited solely to the following examples.
Embodiment 1
One kind solution crosslinked foaming EVA modifying agent, is prepared via a method which to obtain：
(1) mass percent as shared by each raw material is：Foaming EVA80%, steel-making slag powder 20%, choose foaming EVA and slag
Powder, is well mixed；
(2) above-mentioned crosslinked foaming EVA, slag powder mixture are added in banbury carries out power chemistry solution crosslinking, banburying
The temperature setting of machine is 170 DEG C, and rotating speed is set to 30r/min, and the time for solving crosslinking is 20min；
(3) it is placed in above-mentioned in pulverizer through the chemical foaming EVA for solving crosslinking of power, steel-making slag powder blend, crushes, sieves,
Solution crosslinked EVA modifying agent (as shown in Figure 1) of the fineness more than 40 mesh is obtained.
Embodiment 2
One kind solution crosslinked foaming EVA modifying agent, is prepared via a method which to obtain：
(1) mass percent as shared by each raw material is：Foaming EVA90%, steel-making slag powder 10%, choose foaming EVA and slag
Powder, is well mixed；
(2) above-mentioned crosslinked foaming EVA, slag powder mixture are added in banbury carries out power chemistry solution crosslinking, banburying
The temperature setting of machine is 170 DEG C, and rotating speed is set to 30r/min, and the time for solving crosslinking is 25min；
(3) it is placed in above-mentioned in pulverizer through the chemical foaming EVA for solving crosslinking of power, steel-making slag powder blend, crushes, sieves,
Solution crosslinked EVA modifying agent (as shown in Figure 1) of the fineness more than 40 mesh is obtained.
Embodiment 3
By 91.5 parts of bi tumenf orr oads (25 DEG C of needle penetrations are 73dmm, softening point is 48.2 DEG C, 5 DEG C of ductility 0.6cm)
180 DEG C are heated to, prepared solution crosslinked foaming EVA modifying agent in 8.5 parts of embodiments 1 of addition, after to be modified dose all adds,
Keeping temperature is 175 DEG C ± 5 DEG C, starts high-speed shearing machine, and 60min is stirred under 5000rpm rotating speeds, that is, solution crosslinked EVA is obtained
Modified pitch.After tested, the softening point for solving crosslinked EVA modified pitch is 69.7 DEG C, 25 DEG C of needle penetrations are 44dmm, 5 DEG C of ductilities are
7.6cm.Compared with basic asphalt, the modified high-temperature behavior (softening point) of solution crosslinked EVA and cryogenic property (5 DEG C of ductilities) have aobvious
Writing improves.
Embodiment 4
89 parts of bi tumenf orr oads (25 DEG C of needle penetrations are 73dmm, softening point is 48.2 DEG C, 5 DEG C of ductility 0.6cm) are added
Heat to 180 DEG C, after to be modified dose all adds, protect by prepared solution crosslinked foaming EVA modifying agent in 11 parts of embodiments 1 of addition
Temperature is held for 175 DEG C ± 5 DEG C, high-speed shearing machine is started, 60min is stirred under 5000rpm rotating speeds, that is, solution crosslinked EVA is obtained and changes
Property pitch.After tested, the softening point for solving crosslinked EVA modified pitch is 77.4 DEG C, 25 DEG C of needle penetrations are 38dmm, 5 DEG C of ductilities are
8.2cm.Compared with basic asphalt, the modified high-temperature behavior (softening point) of solution crosslinked EVA and cryogenic property (5 DEG C of ductilities) have aobvious
Writing improves.
Embodiment 5
90 parts of bi tumenf orr oads (25 DEG C of needle penetrations are 93dmm, softening point is 45.4 DEG C, 5 DEG C of ductility 1.1cm) are added
To 175 DEG C, prepared solution crosslinked EVA modifying agent in 10 parts of embodiments 2 of addition after to be modified dose all adds, keeps temperature to heat
It is 175 DEG C ± 5 DEG C to spend, and starts high-speed shearing machine, and 60min is stirred under 5000rpm rotating speeds, that is, the modified drip of solution crosslinked EVA is obtained
It is blue or green.After tested, the softening point for solving crosslinked EVA modified pitch is 76.8 DEG C, 25 DEG C of needle penetrations are 48dmm, 5 DEG C of ductilities are
10.5cm.Compared with basic asphalt, the modified high-temperature behavior (softening point) of solution crosslinked EVA and cryogenic property (5 DEG C of ductilities) have
Significantly improve.
Embodiment 6
By 94.5 parts of bi tumenf orr oads (25 DEG C of needle penetrations are 93dmm, softening point is 45.4 DEG C, 5 DEG C of ductility 1.1cm)
175 DEG C are heated to, prepared solution crosslinked EVA modifying agent in 5.5 parts of embodiments 2 of addition after to be modified dose all adds, keeps
Temperature is 175 DEG C ± 5 DEG C, starts high-speed shearing machine, and 60min is stirred under 5000rpm rotating speeds, that is, solution crosslinked EVA is obtained and is modified
Pitch.After tested, the softening point for solving crosslinked EVA modified pitch is 63.2 DEG C, 25 DEG C of needle penetrations are 56dmm, 5 DEG C of ductilities are
7.0cm.Compared with basic asphalt, the modified high-temperature behavior (softening point) of solution crosslinked EVA and cryogenic property (5 DEG C of ductilities) have aobvious
Writing improves.
Comparative example
One kind solution crosslinked foaming EVA, is prepared via a method which to obtain：Crosslinked foaming EVA is added in banbury
The chemistry solution crosslinking of row power, the temperature setting of banbury is 170 DEG C, and rotating speed is set to 30r/min, and the time for solving crosslinking is 25min.
Through power chemistry solution crosslinked foaming EVA adhesions into one, it is impossible to directly crush, it is pressed into sheet in hot press, cut after cooling
Growth bar shaped, is then added into being crushed in pulverizer, can not still obtain powdered solution crosslinked foaming EVA modifying agent, specifically
Ground material object is as shown in Fig. 2 it is thus impossible to be used for asphalt modification.
Obviously, above-described embodiment is only intended to clearly illustrate made example, and not to the limitation of implementation method.For
For those of ordinary skill in the art, the change or change of other multi-forms can also be made on the basis of the above description
It is dynamic.There is no need and unable to be exhaustive to all of implementation method.And the obvious change or variation therefore amplified
Within the protection domain of the invention.
Claims (8)
1. it is a kind of to solve crosslinked foaming EVA modified pitch, it is characterised in that crosslinked EVA modifying agent to be conciliate by pitch and is constituted, each raw material
Component is by mass percentage：Pitch 88% ~ 95%, solution crosslinked foaming EVA modifying agent 5% ~ 12%；The solution crosslinked foaming EVA
Modifying agent is through obtained by power chemistry solution crosslinking preparation by foaming EVA and steel-making slag powder.
2. it is according to claim 1 to solve crosslinked foaming EVA modified pitch, it is characterised in that the solution crosslinked foaming EVA changes
The each component of property agent is by mass percentage：Foaming EVA 80% ~ 90%, steel-making slag powder 10% ~ 20%.
3. it is according to claim 1 and 2 to solve crosslinked foaming EVA modified pitch, it is characterised in that the foaming EVA makes a living
Produce the discarded leftover pieces produced during foaming EVA products.
4. it is according to claim 1 and 2 to solve crosslinked foaming EVA modified pitch, it is characterised in that the fineness of the steel-making slag powder
It is 100 ~ 200 mesh.
5. it is according to claim 1 to solve crosslinked foaming EVA modified pitch, it is characterised in that the solution crosslinked foaming EVA changes
The preparation method of property agent is：Foaming EVA, steel-making slag powder are added in banbury carries out power chemistry solution crosslinking, power chemistry solution crosslinking
After end, gained blend is crushed, is sieved, solution crosslinked foaming EVA modifying agent of the fineness more than 40 mesh is obtained.
6. it is according to claim 5 to solve crosslinked foaming EVA modified pitch, it is characterised in that the power chemistry solution crosslinking
Technique is：The temperature setting of banbury is 170 DEG C, and rotating speed is 30r/min, and the time for solving crosslinking is 20 ~ 25min.
7. it is according to claim 1 to solve crosslinked foaming EVA modified pitch, it is characterised in that the pitch is road oil
Pitch, its needle penetration is 60 ~ 120dmm, and softening point is 45 ~ 50 DEG C.
8. claim 1 ~ 7 it is any it is described solution crosslinked foaming EVA modified pitch preparation method, it is characterised in that including as follows
Step：
（1）Pitch is chosen by each group distribution ratio conciliate crosslinked foaming EVA modifying agent；
（2）Pitch is heated to 170 ~ 180 DEG C, high shear agitation machine is started, solution crosslinked foaming EVA is added thereto to and is modified
Agent, keeping temperature is 170 ~ 180 DEG C, is stirred 60 minutes under the rotating speed of 5000 rpm, prepares solution crosslinked foaming EVA and is modified
Pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277646.8A CN106928733B (en) | 2017-04-25 | 2017-04-25 | A kind of solution crosslinked foaming EVA modified pitch and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277646.8A CN106928733B (en) | 2017-04-25 | 2017-04-25 | A kind of solution crosslinked foaming EVA modified pitch and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106928733A true CN106928733A (en) | 2017-07-07 |
| CN106928733B CN106928733B (en) | 2019-06-25 |
Family
ID=59437144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710277646.8A Expired - Fee Related CN106928733B (en) | 2017-04-25 | 2017-04-25 | A kind of solution crosslinked foaming EVA modified pitch and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106928733B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384035A (en) * | 2018-02-01 | 2018-08-10 | 武汉理工大学 | A kind of hud typed slag base composite modified asphalt particle and preparation method thereof |
| CN111116980A (en) * | 2019-12-11 | 2020-05-08 | 肇庆国立新材料有限公司 | Controllable cracking process of crosslinked EVA material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006107179A2 (en) * | 2005-04-06 | 2006-10-12 | Jung Do Huh | Compositions and manufacturing methods of bitumen modifiers having complex functionality |
| CN105058670A (en) * | 2015-07-15 | 2015-11-18 | 福建豪威节能科技发展有限公司 | Regeneration cloth-manufacturing process for foamed EVA wasted materials |
| CN105385179A (en) * | 2015-12-28 | 2016-03-09 | 天津海泰环保科技发展有限公司 | Waste sole rubber modified asphalt and preparing method thereof |
-
2017
- 2017-04-25 CN CN201710277646.8A patent/CN106928733B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006107179A2 (en) * | 2005-04-06 | 2006-10-12 | Jung Do Huh | Compositions and manufacturing methods of bitumen modifiers having complex functionality |
| CN105058670A (en) * | 2015-07-15 | 2015-11-18 | 福建豪威节能科技发展有限公司 | Regeneration cloth-manufacturing process for foamed EVA wasted materials |
| CN105385179A (en) * | 2015-12-28 | 2016-03-09 | 天津海泰环保科技发展有限公司 | Waste sole rubber modified asphalt and preparing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张伟雄等: "EVA交联发泡废弃物的机械力化学解交联调控及资源化利用", 《福建师范大学学报（自然科学版）》 * |
| 魏诗榴: "《粉体科学与工程（第1版）》", 28 February 2006, 华南理工大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384035A (en) * | 2018-02-01 | 2018-08-10 | 武汉理工大学 | A kind of hud typed slag base composite modified asphalt particle and preparation method thereof |
| CN111116980A (en) * | 2019-12-11 | 2020-05-08 | 肇庆国立新材料有限公司 | Controllable cracking process of crosslinked EVA material |
| CN111116980B (en) * | 2019-12-11 | 2022-12-16 | 肇庆国立新材料有限公司 | Controllable cracking process of crosslinked EVA material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106928733B (en) | 2019-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101239399B1 (en) | Modified asphalt composition and method for preparing the same | |
| CN102050965B (en) | Asphalt modifier granule composition and preparation method thereof | |
| CN104356662B (en) | A kind of spent high molecular modified asphalt composite and preparation method thereof | |
| CN110041720A (en) | A kind of high adhered modification asphalt material and preparation method thereof | |
| CN104194366B (en) | A kind of low-temperature type high-modulus asphalt modifying agent and preparation method thereof | |
| CN100567399C (en) | A kind of rubber powder modified asphalt and working method thereof | |
| CN101921419B (en) | High-modulus modifier composite of bituminous mixture and preparation method thereof | |
| CN101200597A (en) | Method for preparing solid refuse composite modified asphalt | |
| CN103773006A (en) | High-modulus bituminous mixture additive and preparation method thereof | |
| CN103834185A (en) | Polyurethane/nano-composite modified asphalt and preparation method thereof | |
| CN103113044B (en) | High-modulus bituminous mixture admixed with waste material, preparation method and method for preparing mixture specimen | |
| CN107619609A (en) | A kind of novel high-strength rubber powder modified asphalt material and preparation method thereof | |
| CN109095828A (en) | A kind of bituminous concrete and its production technology | |
| CN102603230B (en) | High-concentration rubber powder modified asphalt mixture and preparation method thereof | |
| CN103360774A (en) | Asphaltized rubber modified asphalt and preparation method thereof | |
| CN103911009B (en) | Emulsified rubber powder-modified asphalt and preparation method thereof | |
| CN103468010A (en) | Modified asphalt as well as preparation method thereof | |
| CN107304112A (en) | Green bituminous concrete modified pitch of high-durability energy and preparation method thereof | |
| CN102558886B (en) | High-concentration crumb rubber modified asphalt and preparation method thereof | |
| CN102952293A (en) | Compound rubber powder modifying agent as well as preparation method and application method thereof | |
| CN106928733A (en) | One kind solution crosslinked foaming EVA modified pitch and preparation method thereof | |
| CN101439946B (en) | Preparation of modified rubber asphalt mixture | |
| CN102993757A (en) | Preparation method of stable composite modified asphalt | |
| KR101583763B1 (en) | Modified asphalt composition | |
| CN106633964B (en) | Modified asphalt composition |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190625 Termination date: 20200425 |