CN109867838A - A kind of activated waste rubber powder and preparation method thereof being exclusively used in modified asphalt waterproof coiled material - Google Patents
A kind of activated waste rubber powder and preparation method thereof being exclusively used in modified asphalt waterproof coiled material Download PDFInfo
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- CN109867838A CN109867838A CN201910064843.0A CN201910064843A CN109867838A CN 109867838 A CN109867838 A CN 109867838A CN 201910064843 A CN201910064843 A CN 201910064843A CN 109867838 A CN109867838 A CN 109867838A
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Abstract
The present invention relates to a kind of activated waste rubber powder and preparation method thereof for being exclusively used in modified asphalt waterproof coiled material, which is made of the mixture containing waste rubber powder, softening agent, activator.The invention further relates to a kind of rubber powder modified asphalt waterproof rolls and preparation method thereof, material of coating is made by the mixture containing matrix pitch, softening oil, activated waste rubber powder, filler in the rubber powder modified asphalt waterproof roll, coated on high-strength polyester tire base, surface is covered PE film and is made.There is good compatibility between activated waste rubber powder and matrix pitch of the invention, and can make the modified asphalt waterproof coiled material containing the activated waste rubber powder that there is excellent resistance to low temperature, ageing-resistant performance, cost is relatively low.Also, the advantages that activated waste rubber powder modified asphalt waterproof coiled material comparison traditional handicraft rubber powder modified asphalt waterproof roll of the invention has the process time short, and developmental temperature is low, and viscosity is low, and it is more environmentally friendly that low energy consumption, high production efficiency.
Description
Technical field
The present invention relates to a kind of activated waste rubbers for being exclusively used in modified asphalt waterproof coiled material, further relate to preparation method, also relate to
And modified asphalt waterproof coiled material containing the activation shoddy and preparation method thereof, belong to waterproof roll technical field.
Background technique
Social high speed development in recent years, has driven greatly developing and wanting to the higher of waterproofing work for whole world building trade
It asks.In order to meet the needs of modern social development is to building trade, capital construction construction is all increased with the multiplying power of geometric multiple upwards every year
It is long.What is promoted together is the requirements at the higher level to waterproof material, is badly in need of more environmentally friendly, big, the ageing-resistant waterproof material of high-low temperature resistant difference.
But common asphalt temperature sensibility is poor, fragile under low temperature to split, high temperature easily flows, and loss of properties on aging, unsuitable
It is directly used in waterproof, it is therefore necessary to be modified to pitch, improve the performance of asphalt water-proof coiled material, and anti-suitable for modern project
The demand of water.
Reasonable formula is modified and designed to pitch using modifying agent to use to improve modified asphalt waterproof coiled material
Performance extends the waterproof service life, is the key subjects of current whole world waterproofing industry.To the waterproof made of good modified pitch
The requirement of coiled material is can to accomplish " winter does not crack, and summer is indeformable ", i.e., can resist at high temperature solarization, resistance to compression, anti-deformation,
Do not feel like jelly, when low temperature can be with drop resistant, cracking resistance, and meets the use demand of different waterproofing work grades.
The most popular asphalt modifier of waterproofing industry has SBS (s-B-S block copolymerization at present
Object) and SBR (butadiene-styrene rubber), the modified asphalt waterproof coiled material performance of production is stable, can meet different waterproofing work grades
Use demand.But it is increasingly depleted with petroleum resources, the price of SBS/SBR is higher and higher, and pitch and softening oil
Price also persistently increases, and causes the cost of modified asphalt waterproof coiled material also higher and higher.
At the same time, it is polluted caused by waste tire of automobile, waste plastics, other scrap rubbers etc., has become modern society
Urgent problem.Waste old/plastics and pitch belong to high molecular material, and structure/performance has its phase to a certain extent
Like property, thus using waste old/plastics pitch is modified be the following industry development a main trend.And it can be abundant
Using waste old/plastics, pollution is eliminated, increases economic efficiency, is an energy-saving and environment-friendly new technology.
But it is found that waste Crumb rubber production modified asphalt waterproof coiled material high-temperature storage it is unstable, it is fragile under low temperature to split, apply
Working medium amount is difficult to control.In the prior art, waste Crumb rubber modified asphalt waterproofing membrane production equipment is usually in higher temperature item
Under part, it is made up to stirring in more than ten hour.Waste Crumb rubber is a kind of rubber through over cure, steady by formation of chemical bond
Fixed three-dimensional net structure, it is very poor with bitumen compatibility, it can only be swollen on a small quantity, it is most only to exist in the form of organic filler,
It is limited to the improvement of the high temperature performance of pitch.It, also can be with a series of problems: generating larger simultaneously because of high temperature long agitation
Smell, environmental pollution is big, and security risk is high.How safer, environmentally friendly, efficiency under lower temperature conditions to produce performance steady
Fixed waste Crumb rubber modified asphalt waterproof roll is urgent problem.
In recent years, this concept of reclaimed rubber is proposed repeatedly, and once rubber industry carries out quotient in multiple organizing nation for Ministry of Industry and Information
Research is begged for, how efficiently, environmental protection, recycles scrap rubber/plastics.Compared to traditional scrap rubber processing technique: interface activation
Modification, oligomer coating modification, the methods of modeling solution viscosity reduction is modified, halogenation and sulfonation modifying, graft reaction are modified, edman degradation Edman is modified
There are complex process, operating difficulties, more, the high cost disadvantages of technique time-consuming, and use the modified not only technique of regeneration (desulfurization) method
Simply, high-efficient, easy to operate, modified waste Crumb rubber performance also keeps stable.However domestic main direction is reclaimed rubber at present
It recycles, i.e., can produce rubber product after modification again, also have in terms of road modified asphalt, waste Crumb rubber modified asphalt to be answered
It is few for waterproofing industry research.
Summary of the invention
It is an object of the invention to: it is applied to the shortcoming of waterproofing industry technical aspect for current waste Crumb rubber modified asphalt
Property, a kind of compatibility being effectively improved between waste Crumb rubber and matrix pitch is provided, and there is good storage stability, low temperature
Performance and the activated waste rubber powder of ageing-resistant performance and preparation method thereof, and provide a kind of glue containing the activated waste rubber powder
Powder-modified asphalt waterproof roll and preparation method thereof.
The technical scheme adopted by the invention is that:
The present invention provides a kind of activated waste rubber powders, by the mixing containing waste rubber powder, softening agent and activator
Object is made.
The present invention also provides a kind of preparation methods of activated waste rubber powder, wherein this method comprises: will contain scrap rubber
The mixture constant temperature high speed shear of powder, softening agent and activator.
The present invention also provides the preparation methods of another activated waste rubber powder, wherein this method comprises: will contain useless rubber
The mixture of rubber powder, softening agent and activator is ground through small steel mill.
The present invention also provides a kind of waste Crumb rubber modified asphalt waterproof rolls, by containing matrix pitch, softening oil, work
Change waste Crumb rubber, filler mixture material of coating is made, on high-strength polyester tire base, surface is covered PE film and is made, described for oiling
Activated waste rubber powder is activated waste rubber powder provided by the invention.
The present invention also provides a kind of preparation methods of rubber powder modified asphalt waterproof roll, including by matrix pitch and soften
It is heated to 120-220 DEG C after oil mixing, activated waste rubber powder is added and shears 60- under 100-1000 revs/min of shear velocity
300min, then by colloid mill grinding at least more than twice, be added filler stir 30-150min, most afterwards through oiling, overlay film,
Cooling and winding finished product.The matrix pitch content is 30-80 weight %, and the activated waste rubber powder content is 10-40
Weight %, the softening oil content are 0-20 weight %, and the content of the filler is 0-30 weight %.The activated waste rubber powder
For activated waste rubber powder provided by the invention.
There is good compatibility between activated waste rubber powder and matrix pitch of the invention, and can make containing the work
The modified asphalt waterproof coiled material for changing waste Crumb rubber has excellent resistance to low temperature, and ageing-resistant performance, cost is relatively low.Also, this
The activated waste rubber powder modified asphalt waterproof coiled material comparison traditional handicraft rubber powder modified asphalt waterproof roll of invention has the process time
The advantages that short, developmental temperature is low, and viscosity is low, and it is more environmentally friendly that low energy consumption, high production efficiency.In the present invention to waste Crumb rubber activation at
It manages, chain rupture still not desulfurization, after waste Crumb rubber complete swelling, the sulfide linkage of fracture can recombine again, enhance modified asphalt waterproof
Coiled material storage stability and other performances.
Specific embodiment
It will be described the present invention below:
Activated waste rubber powder provided by the invention is made of the mixture containing waste rubber powder, softening agent and activator.
Based on 100 parts by weight waste Crumb rubbers, the content of the softening agent is 0-20 parts by weight, and the content of the activator is 0-10 weight
Part, and the sum of the softening agent and activator is more than 1 parts by weight and 30 parts by weight are hereinafter, it is preferred that the content of the softening agent
For 2-15 parts by weight, the content of the activator is 0-8 parts by weight.
In the preferred case, activated waste rubber powder of the invention is by mixed containing waste rubber powder, softening agent and activator
Object is closed to be made.It is preferred that the softening agent content is 2-15 parts by weight, the activator is 0-6 parts.
In activated waste rubber powder of the invention, " waste Crumb rubber " is also referred to as " shoddy ", " raw rubber powder ", " rubber powder " or " glue
Grain ", can be used interchangeably in the present specification.Usually prepared by waste old, thus reach waste utilization, energy-saving ring
The purpose of guarantor.Waste Crumb rubber can be commercially available, and waste old such as tire, electric wire, plastic products etc. can also be passed through to this
Method known to the technical staff of field is made.It is preferred that the mesh number of waste Crumb rubber is 20-100 mesh, more preferably 28-80 mesh.It is commercially available
Waste Crumb rubber can be used in the present invention.
In activated waste rubber powder of the invention, the softening agent can be common softening agent in rubber industry, such as
Petroleum-type, coal tar oils and plant oil softening agent, particularly preferred petroleum-type softening agent in the present invention: such as aromatic naphtha, alkane
Oil and naphthenic oil etc..Softening agent plays swelling action to rubber, makes network structure relaxation, increases activator effect, to accelerate useless
The process of rubber powder activation.
In activated waste rubber powder of the invention, the activator mainly plays a part of to activate waste Crumb rubber, useless rubber
The vulcanized network of rubber powder is opened, and can generate living radical at 60 DEG C or more, in conjunction with the sulfide linkage of waste Crumb rubber, prevents it again
Polymerization achievees the purpose that waste Crumb rubber activates.The activator contains 2,4,6- tri-butyl-phenol, the tertiary fourth of the double 6- of 2,2- curing
At least one of base Pyrogentisinic Acid, zinc dimethyl dithiocarbamate, disulphur dichloride, Diphenyl disulfide.It can be by commercially available
It obtains, reaches 480 activator of rubber, other same types using 560 activators of macro environmentally friendly science and technology in Jiangsu and Anhui are sharp in the present invention
Activator is suitable for the present invention.
The preparation method of activated waste rubber powder of the invention includes: will be mixed containing waste Crumb rubber, softening agent and activator
It closes object and stirs 10-30min at 80-170 DEG C of temperature and 800-2000 revs/min of mixing speed, obtain activated waste rubber powder.
The stirring carries out in vertical mixing tank, which can be known to those skilled in the art any can reach the present invention
The equipment of method requirement condition can be closed or semi open model, but cannot be full open model.
The preparation method of activated waste rubber powder of the invention includes: will be mixed containing waste Crumb rubber, softening agent and activator
It closes object and passes through sieving after small steel mill carries out grinding repeatedly 10-50 times under normal temperature conditions, obtain activated waste rubber powder.The small steel
Existing all kinds of specification raw rubber powder grinders known to those skilled in the art are ground, the thick micelle of 20 mesh can be ground to specified mesh
Number rubber powder.
Rubber powder modified asphalt waterproof roll of the invention is by containing matrix pitch, softening oil, activated waste rubber powder, filler
Material of coating is made in mixture, and on high-strength polyester tire base, surface is covered PE film and is made for oiling.The activated waste rubber powder is the present invention
The activated waste rubber powder of offer.Wherein, the matrix pitch content is 30-80 weight %, and the activated waste rubber powder content is
10-40 weight %, the softening oil content are 0-20 weight %, and the content of the filler is 0-30 weight %.
In rubber powder modified asphalt waterproof roll of the invention, the matrix pitch is coal tar pitch, asphalt and natural
Any one or more in pitch.The softening oil is at least one of naphthenic oil, aromatic naphtha, rubber oil, the filler
For at least one of montmorillonite, kaolin, coarse whiting, talcum powder.
The preparation method of rubber powder modified asphalt waterproof roll of the invention is to heat after mixing matrix pitch with softening oil
To 120-200 DEG C, activated waste rubber powder is added and shears 60-300min under 100-1000 revs/min of shear velocity, then passes through
It crosses colloid mill grinding at least more than twice, filler is added and stirs 30-150min, be most made afterwards through oiling, overlay film, cooling and winding
Finished product.
Activated waste rubber powder provided by the invention effectively improves the compatibility of waste Crumb rubber and pitch, shows waterproof
Swelling temperature reduces 10-30 DEG C in coiled material production, and swelling time shortens 1-3h, and is made to coat and expects that viscosity is low, and appearance is fine and smooth,
And the cryogenic property, ageing-resistant performance and adhesive property of asphalt water-proof coiled material are improved, it shows in coiled material finished product detection, low temperature
Flexibility can promote 1-10 DEG C, and low temperature flexibility can promote 0-8 DEG C after aging, and self-adhesion class coiled material stripping performance is also obviously improved.
Main theory of the invention is mainly swelling and degradation in pitch according to being waste Crumb rubber.Pass through high-speed stirring
The grinding of the Strong shear power or grinder of mixing machine squeezes and the physics chemical action of softening agent and activator, makes in waste Crumb rubber
Net macromolecular chain occur oxidation scission, be especially extremely difficult to fracture S -- S and S-C key, and activator generate activity from
It is bonded and is closed by base meeting and the part-S being broken, polymerize it can not again, to generate a large amount of small molecule segments and more activity certainly
By base.The softening agent of addition is swollen waste Crumb rubber further, enable be added pitch in the cracking suction of activated waste rubber powder
It receives the light components in pitch and is swollen.In addition, rubber powder granule be swollen in pitch after in tiny microgranular distribution, it is most of
Active micelle the continuous phase system of stable semisolid is connected to form by gel mould, keep its uniform be dispersed in suspension within pitch
In, form stable architecture.Therefore, can not only improve during rubber powder modified asphalt waterproofing membrane production various asks
Topic, and end properties are also significantly increased.
Illustrate embodiment of the present invention by the following examples, it is but the present invention is not limited to these specific real
Apply example.Wherein in addition to nonspecific indicate, percentage composition of the invention and content ratio are in mass.
Raw material used in each embodiment:
Matrix pitch: Shandong Dongming Petrochemical Group 70# pitch, 25 DEG C of needle penetrations are 76dmm, and softening point is 45.7 DEG C, 10
DEG C ductility is 84.6.
Waste Crumb rubber: Hanzhong City Zhong Hui rubber Science and Technology Ltd., specification are 28 mesh, 40 mesh, 60 mesh, 80 mesh and 120 mesh.
Naphthenic oil: Guangzhou huge port Petroleum Technology Co., Ltd, the trade mark: KN4010.
Rubber filling oil: inspire confidence in profit up to Chemical Co., Ltd., the trade mark: 8# in Shandong.
Base oil: Guangdong Wan Hong petrochemical industry Co., Ltd 17# base oil.
Activator: macro environmental protection Science and Technology Co., Ltd. 560 and Anhui are sharp up to rubber Science and Technology Ltd. 480 in Jiangsu.
Filler: 400 mesh montmorillonite of Shimian, Sichuan chemical industry.
Embodiment:
1. the preparation of activated rubber powder.
Activated rubber powder is prepared in each component ratio and its dosage listed in table 1, softening oil is uniformly mixed with activator
Afterwards, it is added in agitator tank together with waste Crumb rubber, and listed mixing speed in table 1, under whipping temp and mixing time
It is activated, activated rubber powder is made.In the ratio listed in table 2, after mixing by softening oil and activator, then with scrap rubber
Powder is uniformly mixed, and feeding to small steel grinds and ground repeatedly, and activated rubber powder is made after sieving.
Table 1
Table 2
2. the preparation of rubber powder modified asphalt waterproof roll
The work prepared in pitch, softening oil, filler and embodiment 1-10 is used respectively by the component and dosage listed in table 3
Change rubber powder and prepares modified asphalt waterproof coiled material.
After pitch and softening oil mixed melting, 170 DEG C -200 DEG C are heated to, the above-mentioned activation glue being prepared is added
Powder carries out shearing dispersion with 200-800 revs/min of shear velocity, and the time of shearing is shown in Table 3, after the completion of shearing, passes through colloid
Mill grinding is added filler and stirs 40min, and rubber powder modified asphalt waterproof roll is made through oiling, overlay film, cooling and winding.
Table 3
Comparative example 1
After 55 parts of pitch heating meltings, 210 DEG C are heated to, non-activated 30 parts of 60 mesh waste Crumb rubber are added, with 200-
800 revs/min of shear velocity shearing dispersion 150min, is then added 15 parts of fillers through colloid mill grinding and stirs 40min, through applying
Rubber powder modified asphalt waterproof roll is made in oil, overlay film, cooling and winding.
Comparative example 2
After 50 parts of pitches and 10 parts of base oil mixed meltings, 205 DEG C are heated to, non-activated 60 mesh waste Crumb rubber is added
30 parts, with 200-800 revs/min of shear velocity shearing dispersion 150min, 10 parts of fillers of addition then are ground through colloid mill and are stirred
40min is mixed, through oiling, overlay film, cooling and winds obtained rubber powder modified asphalt waterproof roll.
3. performance detection
According to construction material proposed standard, " rubber powder modified asphalt polyester felt and glass fiber reticular cloth enhance waterproof roll (JC/T
1078-2008) ", soft to the low temperature of rubber powder modified asphalt waterproof roll made from above-described embodiment 1-10 and comparative example 1-2 respectively
Property, low temperature flexibility is detected after heat resistance and heat ageing.Testing result is shown in Table 4.
Table 4: embodiment and comparative example the performance test results
The low temperature flexibility and heat ageing low temperature of the coiled material product 1-10 of embodiment 1-10 it can be seen from above-mentioned testing result
It is flexible qualified, wherein 1-2 meets type-I standard, and 3-10 reaches II type standard, and it is modified that especially 4,6,8 and 10 are even up to SBS
Asphalt water-proof coiled material standard requirements.And the low temperature flexibility of the coiled material product 11-12 of comparative example 1-2 is poor, low temperature is soft after heat ageing
Property is not up to I type requirement, unqualified.And the swelling time of 1-10 shortens 1-1.5h, and swelling temperature reduces 10-20 DEG C.Therefore
Activated rubber powder of the invention is more preferable with bitumen compatibility, is easier to be swollen.Thus rubber powder modified asphalt waterproof roll of the invention is low
Low temperature flexibility is more preferable after tenderness, heat ageing, reaches equal performance requirement, and low energy consumption, and more environmentally friendly, cost is relatively low, has good
Comprehensive performance.
Claims (10)
1. a kind of activated waste rubber powder for being exclusively used in modified asphalt waterproof coiled material, which is characterized in that its by containing waste rubber powder,
The mixture of softening agent and activator is made, and is based on 100 parts by weight waste Crumb rubbers, and the content of the softening agent is 2-15 weight
Part, the content of the activator is 1-8 parts by weight, and the softening agent and activator and for more than 1 parts by weight and 30 weights
Measure part or less.
2. activated waste rubber powder according to claim 1, which is characterized in that the partial size of the waste Crumb rubber is 20-150
Mesh；The softening agent is petroleum-type softening agent.
3. activated waste rubber powder according to claim 1 or 2, it is characterised in that the petroleum-type softening agent be naphthenic oil,
At least one of aromatic naphtha, rubber oil；The activator contains 2,4,6- tri-butyl-phenol, the tertiary fourth of the double 6- of 2,2- curing
At least one of base Pyrogentisinic Acid, zinc dimethyl dithiocarbamate, disulphur dichloride, Diphenyl disulfide.
4. a kind of prepare the method for activating shoddy described in one of claim 1-3, which is characterized in that this method comprises: will
Mixture constant temperature high-speed stirred containing waste Crumb rubber, softening agent and activator, whipping temp are 80 DEG C -170 DEG C, the stirring
Speed be 800-2000 revs/min, time of the stirring is 10-60 minutes.
5. a kind of method for preparing activation shoddy as claimed in claim 4, which is characterized in that this method comprises: will be containing useless
The mixture of rubber powder, softening agent and activator is ground through small steel mill, and grinding number is 10-50 times, the grinding condition
To be carried out under normal temperature and pressure.
6. method according to claim 4 or 5, which is characterized in that it is described that waste Crumb rubber is activated, it is broken scrap rubber
In S -- S, S-C key, and it is prevented to polymerize again, forms small molecule chain and living radical, sulfur component is still in mixture
In do not remove.
7. a kind of rubber powder modified asphalt waterproof roll, which is characterized in that the rubber powder modified asphalt waterproof roll containing matrix by dripping
Blueness, softening oil, activated waste rubber powder, filler mixture material of coating is made, be coated on high-strength polyester tire base on, PE is covered on surface
Film is made, and the activated waste rubber powder is activated waste rubber powder described in any one of claim 1-4.
8. rubber powder modified asphalt waterproof roll according to claim 7, which is characterized in that the matrix pitch content is
30-80 weight %, the activated waste rubber powder content are 10-40 weight %, and the softening oil content is 0-20 weight %, described
The content of filler is 0-30 weight %.
9. rubber powder modified asphalt waterproof roll according to claim 7 or 8, which is characterized in that the softening oil is cycloalkanes
At least one of oil, aromatic naphtha, rubber oil；The filler is at least one of montmorillonite, kaolin, coarse whiting, talcum powder.
10. a kind of preparation method of the rubber powder modified asphalt waterproof roll as described in claim 7-9 any one, feature exist
In this method includes being heated to 120-220 DEG C after mixing matrix pitch with softening oil, and activated waste rubber powder is added in 100-
60-300min is sheared under 1000 revs/min of shear velocity, then at least more than twice by colloid mill grinding, filler is added
30-150min is stirred, most afterwards through oiling, overlay film, cooling and winding finished product, the matrix pitch content is 30-80 weight
% is measured, the activated waste rubber powder content is 10-40 weight %, and the softening oil content is 0-20 weight %, the filler
Content is 0-30 weight %.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119352A (en) * | 2019-12-30 | 2020-05-08 | 北新禹王防水科技(安徽)有限公司 | Activated rubber modified asphalt waterproof coiled material and preparation method thereof |
| CN111645217A (en) * | 2020-06-30 | 2020-09-11 | 安徽锐达橡胶科技有限公司 | Microwave radiation rubber powder continuous production system and method |
| CN112341682A (en) * | 2020-11-09 | 2021-02-09 | 广西京帅防水科技有限公司 | Activated rubber powder special for modified asphalt waterproof coiled material and preparation device thereof |
| CN112920714A (en) * | 2019-12-06 | 2021-06-08 | 中胶伟业(北京)橡胶技术研究院有限公司 | Waterproof coating material and preparation method thereof |
| CN114133620A (en) * | 2021-11-22 | 2022-03-04 | 中远海运国际贸易有限公司 | Activated rubber powder, preparation method, composition containing activated rubber powder and stable environment-friendly rubber asphalt |
| CN116640457A (en) * | 2023-06-30 | 2023-08-25 | 中建友（唐山）科技有限公司 | Modified asphalt for waterproof coiled material and preparation method thereof |
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2019
- 2019-01-23 CN CN201910064843.0A patent/CN109867838A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112920714A (en) * | 2019-12-06 | 2021-06-08 | 中胶伟业(北京)橡胶技术研究院有限公司 | Waterproof coating material and preparation method thereof |
| CN111119352A (en) * | 2019-12-30 | 2020-05-08 | 北新禹王防水科技(安徽)有限公司 | Activated rubber modified asphalt waterproof coiled material and preparation method thereof |
| CN111645217A (en) * | 2020-06-30 | 2020-09-11 | 安徽锐达橡胶科技有限公司 | Microwave radiation rubber powder continuous production system and method |
| CN112341682A (en) * | 2020-11-09 | 2021-02-09 | 广西京帅防水科技有限公司 | Activated rubber powder special for modified asphalt waterproof coiled material and preparation device thereof |
| CN114133620A (en) * | 2021-11-22 | 2022-03-04 | 中远海运国际贸易有限公司 | Activated rubber powder, preparation method, composition containing activated rubber powder and stable environment-friendly rubber asphalt |
| CN116640457A (en) * | 2023-06-30 | 2023-08-25 | 中建友（唐山）科技有限公司 | Modified asphalt for waterproof coiled material and preparation method thereof |
| CN116640457B (en) * | 2023-06-30 | 2024-05-14 | 中建友（唐山）科技有限公司 | Modified asphalt for waterproof coiled material and preparation method thereof |
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