CN109320981A - A kind of solid waste phosphogypsum composite modified asphalt and preparation method thereof - Google Patents
A kind of solid waste phosphogypsum composite modified asphalt and preparation method thereof Download PDFInfo
- Publication number
- CN109320981A CN109320981A CN201811178519.3A CN201811178519A CN109320981A CN 109320981 A CN109320981 A CN 109320981A CN 201811178519 A CN201811178519 A CN 201811178519A CN 109320981 A CN109320981 A CN 109320981A
- Authority
- CN
- China
- Prior art keywords
- solid waste
- composite modified
- modified asphalt
- ardealite
- rubber powder
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/329—Phosphorus containing acids
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- 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 invention discloses a kind of solid waste phosphogypsum composite modified asphalt preparation methods, material composition including following weight ratio: petroleum heavy traffic paving asphalt 80%-90%, ardealite 3%-5%, polyphosphoric acids 1%-3%, rubber powder 3%-8%, high molecular polymer 2%-4%, coupling agent 0.5%-1% and crosslinking agent 0.5%-1%.The advantages of the present invention over the prior art are that: the present invention is by making full use of solid waste phosphogypsum and rubber powder come modified pitch; not only solve the problems, such as the processing of the solid waste such as ardealite, rubber powder; reduce environmental pollution; but also it can be further improved the pavement performance of road asphalt; the cost of material for reducing road construction, from the multipurpose for reaching waste product utilization, environmental protection and road improvement performance.This is simple for process, convenient for operation, is suitable for industrialized production.
Description
Technical field
The present invention relates to road engineering material field, in particular to a kind of solid waste phosphogypsum composite modified asphalt and
Preparation method.
Background technique
Asphalt is widely used in each department such as transportation (road, railway, aviation), construction industry, industry, but
Fragile under low temperature to split since the defect of its own, such as high temperature easily soften, the performances such as ageing-resistant, antifatigue are not satisfactory, therefore, add
Add modifying agent to improve asphalt performance be highly effective approach, wherein common modifying agent is SBS, but SBS modified pitch
In, SBS additive amount is excessive, not only increases cost, and due to the high polymer that SBS is a kind of macromolecular, be dispersed in pitch
It is middle to need bigger difficulty, the problems such as be easy to causeing the property of modified pitch sample unstable.For this purpose, searching performance is more excellent, valence
The cheaper modified asphalt material of lattice becomes the emphasis direction studied both at home and abroad.
The industrial by-products generated when ardealite is Wet-process phosphoric acid (WPPA), 1 ton of phosphoric acid of every production need to discharge 4.5~5 tons
Ardealite, the every annual emissions in China are up to 0.5 hundred million tons, and the volume of cargo in storage of country's ardealite has been over 2.5 hundred million tons at present, and
Also constantly increasing.It stores up these ardealites and does not only take up a large amount of soils, also easily cause environmental pollution.Simultaneously by phosphogypsum modification
For highway construction, the stockpiling problem of ardealite not only can solve, save space occupied, energy saving, environment purification, to enterprise
Industry development, social development, reduction engineering cost, preserving the ecological environment has important meaning.Also it can solve in highway construction
Road-making material demand, turns waste into wealth, and meets the strategy of sustainable development.
From the point of view of making full use of resource, high efficiente callback is future trajectory using solid waste such as ardealite, rubber powders
The development trend of material.Ardealite, rubber powder are used for modified pitch, to greatest extent for solving ardealite in highway engineering
With rubber powder mix pitch the technical issues of, and reach improve road asphalt service performance target, thus formed waste product utilize,
Three win situations of environmental protection and road improvement performance.
Summary of the invention
In order to solve the problems in the existing technology, the invention proposes a kind of solid waste phosphogypsum is composite modified
Pitch and preparation method thereof, this method include that ardealite, polyphosphoric acids, rubber are put into the petroleum heavy traffic paving asphalt of heating fusing
Composite modified asphalt material is made in powder, high molecular polymer, coupling agent, crosslinking agent after mixing by stirring.It is provided by the invention
The specific technical proposal is: a kind of solid waste phosphogypsum composite modified asphalt preparation method, the original including following weight ratio
Expect ingredient: petroleum heavy traffic paving asphalt 80%-90%, ardealite 3%-5%, polyphosphoric acids 1%-3%, rubber powder 3%-8%, high score
Sub- polymer 2%-4%, coupling agent 0.5%-1% and crosslinking agent 0.5%-1%；
Specifically the production method is as follows:
A. petroleum heavy traffic paving asphalt is heated to 180~190 DEG C, puts into ardealite and macromolecule thereto again after its fusing
Polymer, and 1-2h is stirred using shearing stirring-head；
B. under conditions of 130~190 DEG C, rubber powder is put into the processed material of step a) and stirs 1-2h；
C. under conditions of 130~190 DEG C, polyphosphoric acids, coupling agent and friendship are put into the processed material of step b)
Connection agent is simultaneously stirred 2-6 hours, and the composite modified asphalt is made.
Preferably, the ardealite is removed using the residue phosphogypsum generated during Wet-process Phosphoric Acid Production by calcining
Dried gypsum product after moisture.
Preferably, the polyphosphoric acids refers to the polyphosphoric acid product of phosphoric acid concentration (in terms of H3PO4) 105%-115%.
Preferably, the rubber powder refers to waste rubber goods through powder obtained from pulverization process.
Preferably, the high molecular polymer is butylbenzene thermoplastic rubber, thermoplastic polyurethane rubber, rosin resin and petroleum
One of resin or several mixtures.
Preferably, the coupling agent is one of Aluminate, silane, titanate esters.
Preferably, the crosslinking agent is the mixture of sulphur or sulphur and maleic anhydride.
The advantages of the present invention over the prior art are that: the present invention mainly uses commercial recovery in terms of raw material selection
Dead meal (ardealite, rubber powder), high molecular polymer and polyphosphoric acids are modifying agent, in conjunction with a small amount of coupling agent and crosslinking agent.
According to specific road index request, the high modified formula of the cost performance met the requirements is prepared.Product of the present invention by using
Other modifications such as ardealite, two kinds of commercial recovery dead meals of rubber powder and polyphosphoric acids, high molecular polymer, coupling agent, crosslinking agent
Agent, the softening point for reaching the modification cost, the modified pitch for reducing environmental pollution, and being prepared that reduce road asphalt are greater than
75 DEG C, 25 DEG C of needle penetrations are 40~60/0.1mm, and 5 DEG C of ductilities are greater than 30cm.
The present invention not only solves ardealite, glue by making full use of solid waste phosphogypsum and rubber powder come modified pitch
The processing problem of the solid waste such as powder, reduces environmental pollution, but also can be further improved the pavement performance of road asphalt,
The cost of material for reducing road construction, from the multipurpose for reaching waste product utilization, environmental protection and road improvement performance.The technique
It is simple and easy, convenient for operation, be suitable for industrialized production.
Specific embodiment
The present invention is described in further detail below.
A kind of solid waste phosphogypsum composite modified asphalt preparation method, the material composition including following weight ratio:
Petroleum heavy traffic paving asphalt 80%-90%, ardealite 3%-5%, polyphosphoric acids 1%-3%, rubber powder 3%-8%, high molecular polymerization
Object 2%-4%, coupling agent 0.5%-1% and crosslinking agent 0.5%-1%；
Wherein the ardealite removes moisture removal by calcining using the residue phosphogypsum generated during Wet-process Phosphoric Acid Production
Dried gypsum product afterwards；The polyphosphoric acids refers to that the polyphosphoric acids of phosphoric acid concentration (in terms of H3PO4) 105%-115% produces
Product；The rubber powder refers to waste rubber goods through powder obtained from pulverization process；The high molecular polymer is butylbenzene heat
Mould one of rubber, thermoplastic polyurethane rubber, rosin resin and Petropols or several mixtures；The coupling agent
It is one of Aluminate, silane, titanate esters；The crosslinking agent is the mixture of sulphur or sulphur and maleic anhydride.
Specifically the production method is as follows:
A. petroleum heavy traffic paving asphalt is heated to 180~190 DEG C, puts into ardealite and macromolecule thereto again after its fusing
Polymer, and 1-2h is stirred using shearing stirring-head；
B. under conditions of 130~190 DEG C, rubber powder is put into the processed material of step a) and stirs 1-2h；
C. under conditions of 130~190 DEG C, polyphosphoric acids, coupling agent and friendship are put into the processed material of step b)
Connection agent is simultaneously stirred 2-6 hours, and the composite modified asphalt is made.
Case study on implementation one
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 84.5%, ardealite 5%, polyphosphoric acids first
1%, rubber powder 4.5%, high molecular polymer 4%, coupling agent 0.5% and crosslinking agent 0.5%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 190 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 2h is stirred using shearing stirring-head；
B. under conditions of 150 DEG C, rubber powder is put into the processed material of step a) and stirs 1h；
C. under conditions of 130 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 5 hours, is made the composite modified asphalt sample 1,1 technical indicator of sample is shown in Table 1.
Case study on implementation two
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 82%, ardealite 5%, polyphosphoric acids first
2%, rubber powder 5%, high molecular polymer 4%, coupling agent 1% and crosslinking agent 1%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 190 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 2h is stirred using shearing stirring-head；
B. under conditions of 150 DEG C, rubber powder is put into the processed material of step a) and stirs 2h；
C. under conditions of 140 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 6 hours, is made the composite modified asphalt sample 2,2 technical indicator of sample is shown in Table 1.
Case study on implementation three
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 80%%, ardealite 4%, polyphosphoric acids first
2%, rubber powder 8%, high molecular polymer 4%, coupling agent 1% and crosslinking agent 1%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 180 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 2h is stirred using shearing stirring-head；
B. under conditions of 160 DEG C, rubber powder is put into the processed material of step a) and stirs 2h；
C. under conditions of 130 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 6 hours, is made the composite modified asphalt sample 3,3 technical indicator of sample is shown in Table 1.
Case study on implementation four
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 87%, ardealite 3%, polyphosphoric acids first
1%, rubber powder 5%, high molecular polymer 3%, coupling agent 0.5% and crosslinking agent 0.5%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 180 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 1.5h is stirred using shearing stirring-head；
B. under conditions of 160 DEG C, rubber powder is put into the processed material of step a) and stirs 1h；
C. under conditions of 130 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 5 hours, is made the composite modified asphalt sample 4,4 technical indicator of sample is shown in Table 1.
Case study on implementation five
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 90%, ardealite 3%, polyphosphoric acids first
1%, rubber powder 3%, high molecular polymer 2%, coupling agent 0.5% and crosslinking agent 0.5%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 190 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 1h is stirred using shearing stirring-head；
B. under conditions of 180 DEG C, rubber powder is put into the processed material of step a) and stirs 1h；
C. under conditions of 180 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 2 hours, is made the composite modified asphalt sample 5,5 technical indicator of sample is shown in Table 1.
Case study on implementation six
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 85%, ardealite 5%, polyphosphoric acids first
1%, rubber powder 4%, high molecular polymer 4%, coupling agent 0.5% and crosslinking agent 0.5%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 190 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 1-2h is stirred using shearing stirring-head；
B. under conditions of 180 DEG C, rubber powder is put into the processed material of step a) and stirs 2h；
C. under conditions of 130 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 5 hours, is made the composite modified asphalt sample 6,6 technical indicator of sample is shown in Table 1.
Case study on implementation seven
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 82%, ardealite 4%, polyphosphoric acids first
2%, rubber powder 7%, high molecular polymer 4%, coupling agent 0.5% and crosslinking agent 0.5%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 180 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 1-2h is stirred using shearing stirring-head；
B. under conditions of 160 DEG C, rubber powder is put into the processed material of step a) and stirs 2h；
C. under conditions of 140 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 4 hours, is made the composite modified asphalt sample 7,7 technical indicator of sample is shown in Table 1.
Case study on implementation eight
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 83.5%, ardealite 5%, polyphosphoric acids first
1%, rubber powder 6%, high molecular polymer 3%, coupling agent 1% and crosslinking agent 0.5%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 180 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 2h is stirred using shearing stirring-head；
B. under conditions of 170 DEG C, rubber powder is put into the processed material of step a) and stirs 2h；
C. under conditions of 140 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 3 hours, is made the composite modified asphalt sample 8,8 technical indicator of sample is shown in Table 1.
Case study on implementation nine
Prepare the material composition of following weight ratio: petroleum heavy traffic paving asphalt 80.5%, ardealite 5%, polyphosphoric acids first
1%, rubber powder 8%, high molecular polymer 4%, coupling agent 0.5% and crosslinking agent 1%；
Composite modified asphalt is made according to the following steps:
A. petroleum heavy traffic paving asphalt is heated to 190 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 1h is stirred using shearing stirring-head；
B. under conditions of 190 DEG C, rubber powder is put into the processed material of step a) and stirs 1h；
C. under conditions of 180 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into simultaneously into the processed material of step b)
Stirring 4 hours, is made the composite modified asphalt sample 9,9 technical indicator of sample is shown in Table 1.
The modified pitch indices that 1 embodiment 1-9 of table is prepared
From table 1 it follows that the softening point for the composite modified asphalt that each case study on implementation is prepared 75 DEG C with
On, other indexs also meet national standard.The present invention is modified drip by making full use of solid waste phosphogypsum and rubber powder
Blueness not only solves the problems, such as the processing of the solid waste such as ardealite, rubber powder, reduces environmental pollution, and can also further mention
The pavement performance of high road asphalt reduces the cost of material of road construction, from reach waste product utilize, environmental protection and road improvement
The multipurpose of performance.This is simple for process, convenient for operation, is suitable for industrialized production.
The foregoing is merely the preferable case study on implementation of the invention patent, be not intended to limit the invention patent, it is all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principle of the invention patent should be included in of the invention special
Within the protection scope of benefit.
Claims (8)
1. a kind of solid waste phosphogypsum composite modified asphalt preparation method, which is characterized in that including following weight ratio
Material composition: petroleum heavy traffic paving asphalt 80%-90%, ardealite 3%-5%, polyphosphoric acids 1%-3%, rubber powder 3%-8%, height
Molecularly Imprinted Polymer 2%-4%, coupling agent 0.5%-1% and crosslinking agent 0.5%-1%；
Specifically the production method is as follows:
A. petroleum heavy traffic paving asphalt is heated to 180~190 DEG C, puts into ardealite and high molecular polymerization thereto again after its fusing
Object, and 1-2h is stirred using shearing stirring-head；
B. under conditions of 130~190 DEG C, rubber powder is put into the processed material of step a) and stirs 1-2h；
C. under conditions of 130~190 DEG C, polyphosphoric acids, coupling agent and crosslinking agent are put into the processed material of step b)
And stir 2-6 hours, the composite modified asphalt is made.
2. a kind of solid waste phosphogypsum composite modified asphalt preparation method according to claim 1, it is characterised in that:
The ardealite is using the residue phosphogypsum generated during Wet-process Phosphoric Acid Production, the dried gypsum after moisture removal is removed in calcining
Product.
3. a kind of solid waste phosphogypsum composite modified asphalt preparation method according to claim 1, it is characterised in that:
The polyphosphoric acids refers to the polyphosphoric acid product of phosphoric acid concentration (in terms of H3PO4) 105%-115%.
4. a kind of solid waste phosphogypsum composite modified asphalt preparation method according to claim 1, it is characterised in that:
The rubber powder refers to waste rubber goods through powder obtained from pulverization process.
5. a kind of solid waste phosphogypsum composite modified asphalt preparation method according to claim 1, it is characterised in that:
The high molecular polymer be one of butylbenzene thermoplastic rubber, thermoplastic polyurethane rubber, rosin resin and Petropols or
Several mixture of person.
6. a kind of solid waste phosphogypsum composite modified asphalt preparation method according to claim 1, it is characterised in that:
The coupling agent is one of Aluminate, silane, titanate esters.
7. a kind of solid waste phosphogypsum composite modified asphalt preparation method according to claim 1, it is characterised in that:
The crosslinking agent is the mixture of sulphur or sulphur and maleic anhydride.
8. a kind of solid waste phosphogypsum composite modified asphalt, it is characterised in that: according to production method system described in claim 1
?.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178519.3A CN109320981A (en) | 2018-10-10 | 2018-10-10 | A kind of solid waste phosphogypsum composite modified asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178519.3A CN109320981A (en) | 2018-10-10 | 2018-10-10 | A kind of solid waste phosphogypsum composite modified asphalt and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109320981A true CN109320981A (en) | 2019-02-12 |
Family
ID=65262187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811178519.3A Pending CN109320981A (en) | 2018-10-10 | 2018-10-10 | A kind of solid waste phosphogypsum composite modified asphalt and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109320981A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276052A (en) * | 2021-12-28 | 2022-04-05 | 云南省公路科学技术研究院 | Phosphogypsum composite modified material for improving performance of asphalt mixture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219271A (en) * | 2015-10-23 | 2016-01-06 | 湖北工业大学 | Uncured phosphorus solid waste modified waterproof asphalt material and preparation technology thereof |
| WO2017179048A1 (en) * | 2016-04-14 | 2017-10-19 | Dejorno Shlomi | Composite material comprising phosphogypsum |
| CN108424661A (en) * | 2018-03-28 | 2018-08-21 | 上海龙孚道路养护工程有限公司 | A kind of composite modified emulsification asphalt and preparation method thereof that antistrip performance is excellent |
-
2018
- 2018-10-10 CN CN201811178519.3A patent/CN109320981A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219271A (en) * | 2015-10-23 | 2016-01-06 | 湖北工业大学 | Uncured phosphorus solid waste modified waterproof asphalt material and preparation technology thereof |
| WO2017179048A1 (en) * | 2016-04-14 | 2017-10-19 | Dejorno Shlomi | Composite material comprising phosphogypsum |
| CN108424661A (en) * | 2018-03-28 | 2018-08-21 | 上海龙孚道路养护工程有限公司 | A kind of composite modified emulsification asphalt and preparation method thereof that antistrip performance is excellent |
Non-Patent Citations (2)
| Title |
|---|
| A.A.CUADRI ET AL: "Valorization of phosphogypsum waste as asphaltic bitumen modifier", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
| 谭明洋等: "磷石膏在道路工程应用的研究现状", 《广州化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276052A (en) * | 2021-12-28 | 2022-04-05 | 云南省公路科学技术研究院 | Phosphogypsum composite modified material for improving performance of asphalt mixture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102617070B (en) | Polyurethane asphalt concrete as well as preparation method and application thereof | |
| CN102061098B (en) | Asphalt mixture warm-mixing modifier and preparation method thereof | |
| CN103979985B (en) | Environment-friendly converter bedding-face repairing material and preparation method thereof | |
| CN102675890B (en) | Demulsifying slow breaking and quick setting modified emulsified asphalt by microwave heating and preparation method thereof | |
| CN101161778B (en) | Method for preparing modified asphalt | |
| CN1639275A (en) | Sulfur additives for paving binders and manufacturing methods | |
| CN104403333B (en) | Cementing particle of modified pitch and its preparation method and application | |
| CN103113751A (en) | Cation-modified emulsified asphalt for bonding layer and preparation method of cation-modified emulsified asphalt | |
| CN103305015A (en) | Warm-mixing high-elastoplasticity bridge expansion joint sealing material and preparation method thereof | |
| CN104130587A (en) | Rubber powder modified asphalt composition capsule | |
| CN102702601A (en) | Direct addition type rubber powder composite asphalt mixture modifier and preparation method thereof | |
| CN106317920A (en) | Coal liquefaction residue compound asphalt and preparation method thereof | |
| CN101844892B (en) | Method for preparing bituminous concrete pavement anti-rutting agent from directly-liquefied coal residue | |
| CN107473635A (en) | Bituminous concrete and its preparation technology | |
| CN109320981A (en) | A kind of solid waste phosphogypsum composite modified asphalt and preparation method thereof | |
| CN103396669B (en) | Microwave desulfurization cracking rubber powder of waste tire composite modified asphalt and preparation method thereof | |
| CN111718590A (en) | Magnetic powder modified asphalt and preparation method thereof | |
| CN1896143A (en) | Thermal-storage-stabilized rubber-powdery asphalt composition and its preparation | |
| CN107987542A (en) | Bridge thermosetting epoxy asphalt material and preparation method thereof | |
| CN104724980A (en) | Cold-mix asphalt concrete mixture and preparation method thereof | |
| CN101629021B (en) | High-quality pavement petroleum asphalt material and preparation method thereof | |
| CN105602265A (en) | Waste tire rubber powder modified asphalt and preparation method thereof | |
| CN110229536A (en) | A kind of paving steel bridge deck bituminous epoxy | |
| CN103803841B (en) | Tracking-resisting modifier and preparation method thereof | |
| CN100338194C (en) | Composite adhesive for industrial briquette and its prepn |
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: 20190212 |