CN107304112A - Green bituminous concrete modified pitch of high-durability energy and preparation method thereof - Google Patents
Green bituminous concrete modified pitch of high-durability energy and preparation method thereof Download PDFInfo
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- CN107304112A CN107304112A CN201610245185.1A CN201610245185A CN107304112A CN 107304112 A CN107304112 A CN 107304112A CN 201610245185 A CN201610245185 A CN 201610245185A CN 107304112 A CN107304112 A CN 107304112A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses green bituminous concrete modified pitch of high-durability energy and preparation method thereof, it is prepared from by 100 parts of matrix pitch, 2~4 parts of plastics, 5~25 parts of rubber powder, 1~10 part of diatomite, 1~16 part of antistripping agent, 4~6 parts of weather-proof component, 2~4 parts of adhesion promoting component, 1~3 part of increase-volume component, 0.1~1 part of linked；The plastics are waste plastic, the rubber powder waste tire；The advantage of the invention is that：The service life of bituminous concrete is effectively extended, high-temperature stability, water stability, low-temperature cracking-resistance and fatigue behaviour is improved, realizes the environmental protection of material.
Description
Technical field
The invention belongs to pavement material field of engineering technology, and in particular to a kind of modified pitch and using this kind of modified pitch as
Concrete modifying pitch prepared by raw material, it is specifically a kind of for highway engineering, with environmental protection and high-durability
Pavement material.
Background technology
Compared to cement concrete pavement, asphalt concrete pavement has surfacing, seamless, driving is comfortable, vibrate
Small, noise is small and the advantages of the short construction time.Therefore, China Higher level highway pavement applies asphalt concrete pavement, ratio mostly
Up to 90% or so.
But asphalt concrete pavement also has shortcoming in itself, its high-temperature stability, water stability, low-temperature cracking-resistance and tired
The not high of labor performance can also make troubles to its application, and as the volume of traffic increases, the increase of the capacity of carriage and canalized traffic
Etc. the appearance of phenomenon, more strict requirements are proposed to asphalt concrete pavement.The asphalt concrete pavement work completed at oneself
Cheng Shang, generally existing the problem of some are common, such as crack, rut, depression, bellding, peeling, loose, these breakoff phenomenons
Had a strong impact on the service life of asphalt concrete pavement, have impact on the normal operation of road, cause it is very big directly or indirectly
Economic loss and bad social influence.
Therefore, the service life of asphalt concrete pavement how is effectively extended, it is ensured that it can be just within design period
Often effective operation is significant.Meanwhile, with the progress of society, the understanding and requirement to environmental protection are more next
It is higher, environmental protection how is taken into account while the exploitation of new product and just seems increasingly important.
In current substantial amounts of research, a part is that a certain performance expansion for being directed to bituminous concrete is specifically studied, such as right
The research of its fire resistance, the haze performance that subtracts, Rapid-Repair function etc.；Another part focuses primarily upon grinding for different pitches modifying agent
Study carefully and develop.The high-modulus asphalt being such as modified by bitumen, its by bitumen and SEBS modifying agent, stabilizer, compatilizer,
Matrix pitch is modified and formed.There is good high temperature anti-rut behavior and fatigue resistance by High Modulus Asphalt Mixture of its preparation
Can, but its water resistant damages performance and cryogenic property is not improved.Its production cost is high simultaneously, it is difficult to applied on a large scale
Promote.
The content of the invention
In order to effectively extend the service life of bituminous concrete, its high-temperature stability, water stability, anti-low-temperature cracking are improved
Property and fatigue behaviour, realize the environmental protection of material, the present invention devises a kind of admixture waste plastic, shoddy（Waste and old rubber
Glue）, diatomite, antistripping agent, weather-proof component, adhesion promoting component, the modified pitch of increase-volume component and linked；Further preferably inertia
Filler, high-quality coarse-fine aggregate, take advanced Bitumen Concrete Mixture Ratio Design method, prepare the modified pitch coagulation of high-quality
Soil.
The technical scheme is that：
The green bituminous concrete modified pitch of high-durability energy, is prepared from by the component of following parts by weight：
It is 100 parts of matrix pitch, 2~4 parts of plastics, 5~25 parts of rubber powder, 1~10 part of diatomite, 1~16 part of antistripping agent, weather-proof
4~6 parts of component, 2~4 parts of adhesion promoting component, 1~3 part of increase-volume component, 0.1~1 part of linked.
The present invention can improve its viscosity, modulus, durability, the modified pitch of ageing resistace with part discarded object,
Modified pitch is using matrix pitch as main material, then preferentially selects solid waste -- and waste plastic and junked tire are broken with it
The plastic grain and rubber powder of broken processing are raw material, then add diatomite, in addition in addition antistripping agent, weather-proof component, thickening
Component, increase-volume component and linked are prepared from for raw material.
In such scheme, the plastics are waste plastic, from the various plastic products produced by daily life；It is described
Rubber powder is even more to derive from waste tire, and its quantity is also extremely huge.Admixture plastics and useless rubber when the present invention prepares modified pitch
Rubber powder, can economize on resources, reduce cost, alleviate " black pollution " problem, realize the cycling and reutilization to discarded object, reduce useless
Pollution of the gurry to environment；On the other hand, shoddy is as one kind of rubber-like, and plastics are as one kind of resin, with reference to each
From the characteristics of, mixed with shoddy and plastics, the high and low temperature performance of pitch can be improved simultaneously, and matrix pitch can be strengthened
Flexibility and permanent deformation resistance.
The plastics are mainly waste and old polypropylene（PP）, waste polyvinyl chloride（PVC）, ethylene-vinyl acetate copolymer
（EVA）One kind in these three materials, these three materials should be individually added into pitch, should not be mixed these three materials and be added.
The rubber powder is the rubber powder crossed by surfactant activation process, the rubber powder and surfactant
（One or more in aromatic radical rubber oil, naphthenic rubber oil ＆ fat hydrocarbon solvent oil are by any proportioning mixing）Mass ratio is
L00 ︰（5~20）；Activating treatment method is：Rubber powder continuously stirs 120s under 40~60 DEG C of temperature conditionss；Then, by several times
Surfactant is added, each addition is 5% or so of rubber powder weight, and each mixing time is 20min, surfactant
Addition is determined regarding rubber powder state；After surfactant is added completely, it should continue to stir rubber powder, until temperature is reduced to room
Temperature（20~25 DEG C）.Wherein, the rubber powder is 40 mesh rubber powders.
In such scheme, the diatomite is that super-cell is calcined product, and the product are in light red orange, are powdered diatom
Soil, fineness is higher.Super-cell has good microcellular structure, absorption property and anti-compression properties, and it presses production technology
Difference is divided into dry algae product, calcining product and flux calcination product, and super-cell calcination product are adopted as herein.By purifying, do
Diatomite material after dry, crushing adds rotary kiln, is calcined at a temperature of 800~1200 DEG C, then crushes, is classified, produces
Calcining product.
In such scheme, the antistripping agent includes one in calcium lignosulfonate, sodium lignin sulfonate and Petropols
Plant or several.Calcium lignosulfonate is nontoxic, with good stability, dispersiveness and caking property.Sodium lignin sulfonate has
Good stability and dispersiveness, can be adsorbed on the surface of various solid particles.Petropols have good chemically stable
Property, and have the characteristics of adjusting viscosity and good heat endurance, and it is cheap, it is nontoxic, it is environmentally friendly.This several material can divide
Not separately as anti-strip component, can also any several combinations of substances be regard as anti-strip component.The antistripping agent is used to carry
The adhesiveness of high mineral aggregate, can effectively prevent mineral aggregate from peeling off to come off, it is to avoid road ftractures.
In such scheme, the weather-proof component is line style SBS.
In such scheme, the adhesion promoting component is in note olefine resin, rosin resin, C9 Petropols and C5 Petropols
One or more are mixed in any proportion.
In such scheme, the increase-volume component is furfural extract oil, second line of distillation tapped oil, subtract three line tapped oil, aromatic naphtha
In one or more mix in any proportion.
In such scheme, the linked is sulphur or cumyl peroxide.
The preparation method of above-mentioned concrete modifying pitch, comprises the following steps：
（1）According to above-mentioned weight proportion weight each component, by matrix pitch heating and melting, 100~140 DEG C are maintained the temperature at（Note
Meaning temperature too high can not prevent matrix pitch aging from influenceing its performance）；
（2）Plastics and shoddy are added to through step（1）In the matrix pitch of thawing, open cutter and be stirred shearing,
Shear rate is 1250 r/min~3750r/ min, and shear time is the h of 1 h~2, and shear temperature is 120 DEG C~160 DEG C；
（3）Diatomite is added to through step（2）In modified pitch, open cutter and be stirred shearing, shear rate
For 550 r/min, shear time at least 10 min, shear temperature is 135 ± 5 DEG C, is moved up and down according to order from top to bottom
Blade；
（4）Antistripping agent is added to through step（3）In modified pitch, open cutter and be stirred shearing, shearing speed
Rate is 5000 r/min, and the min of shear time 30, shear temperature is 130 DEG C~150 DEG C；
（5）Will be through step（4）Modified pitch is heated to 160 DEG C, opens cutter and is stirred shearing, shear rate is
2500 r/min, add weather-proof component, the min of shear time 15；Keep shear rate constant, add adhesion promoting component, shear time
3 min, lifting shear rate to 5000 r/min adds increase-volume component, the min of shear time 20, reduction shear rate to 3500
R/min, adds linked, the min of shear time 30；
（6）Complete step（5）Afterwards, the modified pitch prepared is placed in 145 DEG C of baking ovens and is swelled 60 min of development, in an oven
Sample is taken out, modified pitch is obtained after cooling；
After the completion of prepared by modified pitch of the present invention, preferred filler and gather materials（Including coarse aggregate and fine aggregate）, prepare pitch coagulation
Soil, and verify its performance.
Wherein, the filler is inert filler, is the levigate obtained miberal powder of strong basic rock in limestone or magmatic rock.Fill out
Expect larger to the performance impact of bituminous concrete, the inert filler content that the present invention is selected for bituminous concrete weight 10%~
20%, its particle diameter is between the um of 50 um~300.
The coarse aggregate is that basalt or diabase gather materials, crush values<10%, coarse aggregate is different according to actual requirement, is divided into
The mm of the mm of the mm of 2.36 mm~4.75,4.75 mm~9.5,9.5 mm~19（Or the mm of 9.5 mm~13.2/16,13.2 mm
~19 mm）It is interval Deng different-grain diameter；The fine aggregate is that limestone, basalt or diabase gather materials, and fine aggregate particle size interval is
The mm of 0.075 mm~2.36.
Thickness is gathered materials and the preferred Primary Reference of filler its technology quality index, its technology quality index be specifically shown in Table 1, table 2,
Table 3：
The requirement of the coarse aggregate technology quality index of table 1
| Index | Unit | Technical requirements | Remarks |
| Crush values | % | ≯10 | |
| Los Angeles abrasion loss | % | ≯28 | |
| 200KN lateral spacing compression rebound modulus | MPa | ＞ 230 | |
| Coarse aggregate apparent density | g/cm3 | ≮2.6 | |
| Coarse aggregate bulk density | g/cm3 | - | |
| Water absorption rate | % | ≯2.0 | |
| Robustness | % | ≯12 | |
| Elongated particles（Compound） | % | 15 | |
| Particle diameter is more than 9.5rmn elongated particles | % | 12 | |
| Particle diameter is less than 9.5rmn elongated particles | % | 18 | |
| <0.075mm granule contents | % | ≯1 | |
| Polishing value | BPN | ≮42 | |
| Coarse aggregate and asphalt adhesion | Level | ≮4 | |
| Each shelves material sieve-analysis curve | - | Actual measurement |
The requirement of the fine aggregate technology quality index of table 2
| Index | Unit | Technical requirements | Remarks |
| Apparent density | g/cm3 | ≮2.5 | |
| Bulk density | g/cm3 | - | |
| Water absorption rate | % | ≯2.0 | |
| Robustness（>0.3mm particles） | % | ≯12 | |
| Sand equivalent | % | ≮60 | |
| Methylene blue number | g/kg | ≯25 | |
| Fine aggregate water stability grade | Level | ≯8 | |
| Sieve-analysis curve | - | Actual measurement |
The requirement of the packing technique quality index of table 3
The advantage of the invention is that：
（1）Plastics, shoddy and diatomite have been used, has been economized on resources, environmental protection；
（2）The modified pitch endurance quality of preparation is more excellent, and the bituminous concrete endurance quality prepared using it as raw material is more
It is excellent；
With reference to embodiment, the invention will be further described.
Embodiment
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Unless otherwise indicated, the percentage employed in the present invention is percetage by weight.
Embodiment 1
The green bituminous concrete modified pitch of high-durability energy, its component content is as follows:
| Ingredient names | Content（%） | The place of production |
| Matrix pitch | 100 | Gram petro-chemical corporation |
| Ethylene-vinyl acetate copolymer（EVA） | 2 | |
| Rubber powder | 25 | |
| Diatomite | 5 | |
| Antistripping agent | 10 | |
| Weather-proof component | 6 | |
| Adhesion promoting component | 2 | |
| Increase-volume component | 2 | |
| Linked | 0.5 |
Remarks：Based on matrix pitch, the percentage of other admixture materials refers to that its weight accounts for the percentage of matrix pitch kind amount
Rate.
By above-mentioned each component content, modified pitch is prepared according to specific preparation technology in the content of the invention.
Embodiment 2
The green bituminous concrete modified pitch of high-durability energy, its component content is as follows:
| Ingredient names | Content（%） | The place of production |
| Matrix pitch | 100 | Gram petro-chemical corporation |
| Ethylene-vinyl acetate copolymer（EVA） | 2.5 | |
| Rubber powder | 20 | |
| Diatomite | 5 | |
| Antistripping agent | 5 | |
| Weather-proof component | 5 | |
| Adhesion promoting component | 3 | |
| Increase-volume component | 2 | |
| Linked | 0.2 |
By above-mentioned each component content, modified pitch is prepared according to specific preparation technology in the content of the invention.
Embodiment 3
The green bituminous concrete modified pitch of high-durability energy, its component content is as follows:
| Ingredient names | Content（%） | The place of production |
| Matrix pitch | 100 | Gram petro-chemical corporation |
| Polypropylene（PP） | 2.5 | |
| Rubber powder | 25 | |
| Diatomite | 0 | |
| Antistripping agent | 10 | |
| Weather-proof component | 6 | |
| Adhesion promoting component | 4 | |
| Increase-volume component | 1 | |
| Linked | 1 |
By above-mentioned each component content, modified pitch is prepared according to specific preparation technology in the content of the invention.
Embodiment 4
The green bituminous concrete modified pitch of high-durability energy, its component content is as follows:
| Ingredient names | Content（%） | The place of production |
| Matrix pitch | 100 | Gram petro-chemical corporation |
| Polyvinyl chloride（PVC） | 4 | |
| Rubber powder | 15 | |
| Diatomite | 5 | |
| Antistripping agent | 16 | |
| Weather-proof component | 4 | |
| Adhesion promoting component | 2 | |
| Increase-volume component | 3 | |
| Linked | 0.1 |
By above-mentioned each component content, modified pitch is prepared according to specific preparation technology in the content of the invention.
Foundation《Highway engineering pitch and Asphalt Mixture Experiment code》（JTJ E20-2011）To embodiment 1 to embodiment
Modified pitch prepared by 4 carries out the performance tests such as needle penetration, ductility, as a result see the table below shown.
| Index name | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Unmodified bi tumenf orr oad |
| 15 DEG C of needle penetration/0.1mm | 30.3 | 29.1 | 28.9 | 31 | 39.4 |
| 25 DEG C of needle penetration/0.1mm | 49.7 | 49.2 | 48.6 | 55 | 70.6 |
| 30 DEG C of needle penetration/0.1mm | 75.5 | 74.5 | 73.9 | 77.6 | 89.8 |
| Ductility（5℃）/cm | 56 | 59 | 64 | 55 | 17 |
| Softening point/DEG C | 61.5 | 61.2 | 60.5 | 62.3 | 48.9 |
| Ultimate oxidation index | 25 | 24 | 22 | 24 | 19 |
| Elastic restoration ratio（25℃）, % | 98 | 97 | 98 | 97 | 92 |
| Dynamic viscosity（60℃）, Pas | 889 | 894 | 905 | 855 | 189 |
| Kinematic viscosity（135℃）, Pas | 3.5 | 3.4 | 3.8 | 3 | 0.48 |
| Adhesiveness grade | 5 | 5 | 5 | 5 | 5 |
| Flash-point, DEG C | 330 | 325 | 330 | 320 | 320 |
Embodiment 5
With the 4 kinds of modified pitch and unmodified bi tumenf orr oad prepared by embodiment 1-4, pitch is that pitch is former in 5 altogether
Material, uses broken basalt for coarse-fine aggregate, using agstone as filler, coordinates according to 4 bituminous concretes shown in following table
Than preparing bituminous concrete（Bituminous concrete species is respectively：AC—16mm、AC—13.2mm、AC—19mm）, 20 groups altogether
Bituminous concrete.
Note：In match ratio species 1-4, the asphalt material of each match ratio has 5 kinds：It is embodiment 1-4 modified pitch, unmodified
Bi tumenf orr oad.Therefore 1 match ratio can prepare 5 groups of bituminous concretes, 20 groups of bituminous concretes altogether.
20 groups of bituminous concretes are tested, result of the test see the table below.
Claims (10)
1. a kind of concrete modifying pitch, it is characterised in that be prepared from by the component of following parts by weight：
It is 100 parts of matrix pitch, 2~4 parts of plastics, 5~25 parts of rubber powder, 1~10 part of diatomite, 1~16 part of antistripping agent, weather-proof
4~6 parts of component, 2~4 parts of adhesion promoting component, 1~3 part of increase-volume component, 0.1~1 part of linked；The plastics are waste plastic,
The rubber powder waste tire.
2. a kind of concrete modifying pitch according to claim 1, it is characterised in that：The plastics are mainly waste and old poly- third
One kind in these three materials of alkene, waste polyvinyl chloride, ethylene-vinyl acetate copolymer.
3. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The rubber powder is by table
The rubber powder that face activator activation process is crossed, the mass ratio of the rubber powder and surfactant is l00 ︰（5~20）；At activation
Reason method is：Rubber powder continuously stirs 120s under 40~60 DEG C of temperature conditionss；Then, surfactant is added by several times, often
Secondary addition is 5% or so of rubber powder weight, and each mixing time is 20min, and surfactant addition regards rubber powder state
It is determined that；After surfactant is added completely, continue to stir rubber powder, until temperature is reduced to room temperature.
4. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The diatomite is diatomite
Filter aid is calcined product.
5. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The antistripping agent includes wood
One or several kinds in quality sulfoacid calcium, sodium lignin sulfonate and Petropols.
6. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The weather-proof component is line style
SBS.
7. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The adhesion promoting component is note alkene
One or more in resin, rosin resin, C9 Petropols and C5 Petropols are mixed in any proportion.
8. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The increase-volume component is furfural
One or more in tapped oil, second line of distillation tapped oil, subtract three line tapped oil, aromatic naphtha are mixed in any proportion.
9. a kind of concrete modifying pitch according to claim 1 or 2, it is characterised in that：The linked is sulphur
Or cumyl peroxide.
10. a kind of preparation method of concrete modifying pitch as described in claim 1-9 any one, it is characterised in that including
Following steps：
（1）According to above-mentioned weight proportion weight each component, by matrix pitch heating and melting, 100~140 DEG C are maintained the temperature at；
（2）Plastics and shoddy are added to through step（1）In the matrix pitch of thawing, open cutter and be stirred shearing,
Shear rate is 1250 r/min~3750r/ min, and shear time is the h of 1 h~2, and shear temperature is 120 DEG C~160 DEG C；
（3）Diatomite is added to through step（2）In modified pitch, open cutter and be stirred shearing, shear rate
For 550 r/min, shear time at least 10 min, shear temperature is 135 ± 5 DEG C, is moved up and down according to order from top to bottom
Blade；
（4）Antistripping agent is added to through step（3）In modified pitch, open cutter and be stirred shearing, shearing speed
Rate is 5000 r/min, and the min of shear time 30, shear temperature is 130 DEG C~150 DEG C；
（5）Will be through step（4）Modified pitch is heated to 160 DEG C, opens cutter and is stirred shearing, shear rate is
2500 r/min, add weather-proof component, the min of shear time 15；Keep shear rate constant, add adhesion promoting component, shear time
3 min, lifting shear rate to 5000 r/min adds increase-volume component, the min of shear time 20, reduction shear rate to 3500
R/min, adds linked, the min of shear time 30；
（6）Complete step（5）Afterwards, the modified pitch prepared is placed in 145 DEG C of baking ovens and is swelled 60 min of development, in an oven
Sample is taken out, modified pitch is obtained after cooling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610245185.1A CN107304112A (en) | 2016-04-19 | 2016-04-19 | Green bituminous concrete modified pitch of high-durability energy and preparation method thereof |
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|---|---|---|---|
| CN201610245185.1A CN107304112A (en) | 2016-04-19 | 2016-04-19 | Green bituminous concrete modified pitch of high-durability energy and preparation method thereof |
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| CN108147727A (en) * | 2018-02-02 | 2018-06-12 | 司彦胜 | A kind of high strength asphalt concrete pavement construction method |
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| WO2021019482A1 (en) * | 2019-07-31 | 2021-02-04 | Alessandro Mondini | Conglomerate for making road pavements, compound for making the conglomerate and related production method |
| CH716475A1 (en) * | 2019-07-31 | 2021-02-15 | Mondini Alessandro | Conglomerate for the construction of road surfaces. |
| CN110700033A (en) * | 2019-09-06 | 2020-01-17 | 北京中天路业科技有限公司 | Method for preparing durable asphalt concrete old material regeneration additive by utilizing waste tire rubber powder |
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Application publication date: 20171031 |