CN107056118A - A kind of modified asphalt mixture based on high temperature difference area and preparation method thereof - Google Patents
A kind of modified asphalt mixture based on high temperature difference area and preparation method thereof Download PDFInfo
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- CN107056118A CN107056118A CN201710196258.7A CN201710196258A CN107056118A CN 107056118 A CN107056118 A CN 107056118A CN 201710196258 A CN201710196258 A CN 201710196258A CN 107056118 A CN107056118 A CN 107056118A
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- China
- Prior art keywords
- modified asphalt
- temperature
- asphalt mixture
- change material
- diatomite
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Classifications
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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
-
- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
-
- 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)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to road engineering pavement engineering field, a kind of modified asphalt mixture based on high temperature difference area and its production method are disclosed, modified asphalt mixture " modification " is embodied in the part as fine aggregate using stearic acid+palmitic acid/expanded perlite binary composite shape-setting phase-change material.Using diatomite as modifying agent doped matrix pitch, diatomaceous quality is the 1.5% ~ 2% of matrix pitch quality.Bituminous paving high-temperature stability and low-temperature cracking-resistance evaluation criterion are set up, the proportioning situation of each composition of modified asphalt mixture used can be determined according to the range of temperature of this area, building materials is saved.This modified asphalt mixture substantially improves pavement performance of the bituminous paving in high and low temperature environment simultaneously using the complex method of " active "+" passive " formula, and can protect top course and basic unit with heat-insulated effect.Compound material therefor is environmentally friendly and cheap, contributes to development environment friendly bituminous paving.
Description
Technical field
The invention belongs to road engineering pavement engineering field, it is related to a kind of modified asphalt mixture and preparation method thereof, especially
It is a kind of modified asphalt mixture based on high temperature difference area and preparation method.
Background technology
Since economic crisis in 2008, country adds input to infrastructure construction, especially in terms of highway,
The area such as northeast, northwest and Qinghai-Tibet Platean also enters the great development period of highway construction.But these areas belong to high temperature
Poorly area, two season of winter in summer the temperature difference it is big, annual range of temperature reaches as high as 49.2 DEG C.China's primary highway and urban road are largely all used
Bituminous paving.In the running of road, bituminous paving summer summer, due to heat absorption, easily produces brokenly because of high temperature unstability
It is bad, wherein using rut as main damage form；In the winter time, particularly the Northeast, due to temperature decrease, road surface easily produces temperature
Spend crack.The measure taken in the past both at home and abroad is mainly by adding modified pitch or being solved using matrix type aggregate grading
Certainly, these " passive " type measures have also increased considerably input cost while temperature disease probability of happening is reduced, and reduce
Economic benefit, and the variability of difficulty of construction and construction quality is added, case history proves that these technologies can not be from root
Bituminous paving temperature disease is solved the problems, such as in sheet.Therefore, solve bituminous paving temperature disease problems demand and find new breakthrough mouthful.
Phase-change material changes state of matter as a kind of vary with temperature and can provide the material of latent heat, and it can be in phase
Substantial amounts of latent heat is absorbed or discharged during change process.Using this characteristic of phase-change material, there are some scholars to apply it to road
Construction field, and road surface phase-change material research now is only simply to be used as one kind by the use of phase-change material (unit is polynary)
Additive, phase-change material is easy for fail and having a strong impact on the pavement performance of bituminous paving, and this application mode is simple
But it is difficult to the advantage for playing phase-change material.And the other fields applied in phase-change material, scholar is using a kind of outside hard and property
The stable carrier carrying phase-change material-shaping phase-change material of matter has obtained applying well.Therefore, on road especially road surface
In terms of asphalt, shaping phase-change material have it is more and deeper into application.Scholar in the past is simple by phase-change material
Or shaping phase-change material is as additive, and wants it and play bigger effect, especially shaping phase-change material, its morphological properties
Stablize, and form and dimension can change according to specific needs, so can be obtained in the fine aggregate, coarse aggregate in asphalt
Certain application, its modified asphalt mixture being made will road pavement Material Field generation far-reaching influence.
Therefore, a kind of modified asphalt mixture suitable for high temperature difference area of research and development, for high temperature difference area
Highway Large scale construction has positive effect.
The content of the invention
The modification of high temperature difference local temperature disease can be effectively prevented and treated the technical problem to be solved in the present invention is to provide a kind of
Asphalt and preparation method thereof, solves the contradiction between bituminous paving high-temperature stability and low-temperature cracking-resistance, is able in height
Large-scale application in the highway construction in temperature difference area.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of modified asphalt mixture based on high temperature difference area, it is characterised in that with stearic acid+palmitic acid/expanded pearlite
Rock binary composite shape-setting phase-change material is used as asphalt modification as a part for fine aggregate to fill diatomaceous matrix pitch
Agent.
According to claim 1, bituminous paving high-temperature stability and low-temperature cracking-resistance evaluation criterion, bituminous paving are set up
Can all there is a pavement performance catastrophe point in high temperature and low temperature, we are called " thermal change point " and " cold height " respectively, according to
The range of temperature of this area determines at 2 points, and meets modified asphalt mixture " thermal change point " a little higher than phase-change material of temperature
Phase transition temperature, so that it is determined that the optimum amount of modified asphalt mixture each component.
Shaping phase-change material according to claim 1 and 2 is with stearic acid：Palmitic acid：Expanded perlite=2:3:2.5
Mass ratio.
Shaping phase-change material according to claim 1 and 2, it is characterised in that use vacuum impregnation technology, passes through encapsulation
Technique is prepared from.
Shaping phase-change material according to claim 1 and 2, it is characterised in that exist during preparation first with magnetic stir bar
Stir 30~40 minutes, then vacuumize 1~2 hour under 90 DEG C of water bath conditions.
Shaping phase-change material according to claim 1 and 2 accounts for the 13%~21% of fine aggregate gross mass.
Diatomite modified asphalt according to claim 1 and 2, it is characterised in that described diatomaceous quality is to change
The 1.5%~2% of property pitch mesostroma asphalt quality.
Diatomite modified asphalt according to claim 1 and 2, it is characterised in that described diatomite modified asphalt
Quality accounts for the 3.8%~4.2% of the quality of asphalt mixtures.
Diatomite modified asphalt according to claim 1 and 2, it is characterised in that matrix pitch is heated to 160 DEG C
Afterwards, diatomite asphalt modifier is made after adding diatomite, high speed shear 20min.
The preparation method of the modified asphalt mixture based on high temperature difference area according to claim 1,2,3 and 4,
It is characterized in that the step of preparation process of this method is：
(1) it will gather materials and be heated to 160 DEG C~170 DEG C；
(2) by the incorporation of stearic acid+palmitic acid/expanded perlite binary composite shape-setting phase-change material heated gather materials in and stir
90 seconds；
(3) diatomite modified asphalt is added in mixing is gathered materials, is then stirred 90 seconds under the conditions of 170 DEG C~180 DEG C, you can
To the modified asphalt mixture.
The present invention compared with the prior art, with advantages below and beneficial effect：
(1) present invention establishes a kind of bituminous paving high-temperature stability and low-temperature cracking-resistance evaluation criterion, is modified preparing
Before asphalt, according to construct area specific annual range of temperature change determine modified asphalt mixture " thermal change point " and
" cold height ", so that it is determined that the optimum amount of modified asphalt mixture each component.
(2) present invention is directed to high temperature difference local temperature disease problem, different from traditional prophylactico-therapeutic measures, introduces Material Field
A kind of new shaping phase-change material as fine aggregate a part, and using a kind of fabulous diatom land reform of low-temperature cracking-resistance
Property pitch as asphalt modifier, the complex method of this " active "+" passive " formula substantially improves bituminous paving in height simultaneously
The pavement performance of low temperature environment, and can protect top course and basic unit with heat-insulated effect.
(3) present invention is with the help of this evaluation criterion, and modified asphalt mixture can not only play its optimal use work(
Can, and unnecessary wastage of material can also be saved.And modified used material is all pollution-free and cheap inorganic
Material, meets the requirement of energy-conserving and environment-protective.
Embodiment
With reference to embodiment, the present invention is further detailed explanation.
Embodiment 1
According to somewhere historical temperature observed data, determine that this area year maximum temperature difference is 45 DEG C, 35 DEG C of the highest temperature is minimum
- 10 DEG C of temperature；
According under the shaping phase-change material of different quality, asphalt " thermal change measured in 60 DEG C of wheel tracking tests
Point ", sets up the graph of relation of shaping phase-change material quality and " thermal change point " temperature, and meets " thermal change point " and be higher than setting
The precondition of phase-change material phase transition temperature, determines that stearic acid+palmitic acid/expanded perlite binary composite shape-setting phase-change material is accounted for
The 16% of fine aggregate gross mass；
According under the diatomite of different quality, asphalt " cold height " measured in low temperature bend test is built
The graph of relation of vertical diatomite quality and " cold height " temperature, it is modified pitch mesostroma asphalitine to determine diatomaceous quality
The 1.8% of amount；
Diatomite modified asphalt is determined also according to the graph of relation of diatomite quality and " cold height " temperature, it is described
The quality of diatomite modified asphalt accounts for the 3.8% of the quality of asphalt mixtures；
Matrix pitch uses domestic 70# pitches；
Coarse aggregate uses limestone gravel；
Fine aggregate uses Machine-made Sand and described shaping phase-change material；
Miberal powder uses limestone mineral powder；
Domestic 70# pitches are heated to after 160 DEG C, addition diatomite, diatom natural asphalt, which is made, after high speed shear 20min changes
Property agent；
It will gather materials and be heated to 160 DEG C~170 DEG C；
By the incorporation of stearic acid+palmitic acid/expanded perlite binary composite shape-setting phase-change material heated gather materials in and stir
Mix 90 seconds；
In level with diatomite modified asphalt is added in gathering materials, then stirred 90 seconds under the conditions of 170 DEG C~180 DEG C, you can
Obtain the modified asphalt mixture.
Embodiment 2
According to somewhere historical temperature observed data, determine that this area year maximum temperature difference is 35 DEG C, 23 DEG C of the highest temperature is minimum
- 12 DEG C of temperature；
According under the shaping phase-change material of different quality, asphalt " thermal change measured in 60 DEG C of wheel tracking tests
Point ", sets up the graph of relation of shaping phase-change material quality and " thermal change point " temperature, and meets " thermal change point " and be higher than setting
The precondition of phase-change material phase transition temperature, determines that stearic acid+palmitic acid/expanded perlite binary composite shape-setting phase-change material is accounted for
The 14% of fine aggregate gross mass；
According under the diatomite of different quality, asphalt " cold height " measured in low temperature bend test is built
The graph of relation of vertical diatomite quality and " cold height " temperature, it is modified pitch mesostroma asphalitine to determine diatomaceous quality
The 2% of amount；
Diatomite modified asphalt is determined also according to the graph of relation of diatomite quality and " cold height " temperature, it is described
The quality of diatomite modified asphalt accounts for the 4.0% of the quality of asphalt mixtures；
Matrix pitch uses domestic 70# pitches；
Coarse aggregate uses basalt and limestone gravel；
Fine aggregate uses Machine-made Sand and described shaping phase-change material；
Miberal powder uses limestone mineral powder；
Domestic 70# pitches are heated to after 160 DEG C, addition diatomite, diatom natural asphalt, which is made, after high speed shear 20min changes
Property agent；
It will gather materials and be heated to 160 DEG C~170 DEG C；
By the incorporation of stearic acid+palmitic acid/expanded perlite binary composite shape-setting phase-change material heated gather materials in and stir
Mix 90 seconds；
In level with diatomite modified asphalt is added in gathering materials, then stirred 90 seconds under the conditions of 170 DEG C~180 DEG C, you can
Obtain the modified asphalt mixture.
Claims (9)
1. a kind of modified asphalt mixture based on high temperature difference area, it is characterised in that with stearic acid+palmitic acid/expanded perlite
Binary composite shape-setting phase-change material is used as asphalt modifier as a part for fine aggregate to fill diatomaceous matrix pitch.
2. according to claim 1, set up bituminous paving high-temperature stability and low-temperature cracking-resistance evaluation criterion, asphalt
Can all there is a pavement performance catastrophe point in high temperature and low temperature, we are called " thermal change point " and " cold height " respectively, according to
The range of temperature of this area determines at 2 points, and meets modified asphalt mixture " thermal change point " a little higher than phase-change material of temperature
Phase transition temperature, so that it is determined that the optimum amount of modified asphalt mixture each component.
3. the shaping phase-change material according to claim 1 and 2 is with stearic acid：Palmitic acid：Expanded perlite=2:3:2.5
Mass ratio.
4. the shaping phase-change material according to claim 1 and 2, it is characterised in that vacuum impregnation technology is used, by encapsulating work
Skill is prepared from.
5. the shaping phase-change material according to claim 1 and 2, it is characterised in that first with magnetic stir bar 90 during preparation
Stir 30 minutes, then vacuumize 1 hour under DEG C water bath condition.
6. the diatomite modified asphalt according to claim 1 and 2, it is characterised in that described diatomaceous quality is modification
The 1.5% ~ 2% of pitch mesostroma asphalt quality.
7. the diatomite modified asphalt according to claim 1 and 2, it is characterised in that the matter of described diatomite modified asphalt
Amount accounts for the 3.8% ~ 4.2% of the quality of asphalt mixtures.
8. the diatomite modified asphalt according to claim 1 and 2, it is characterised in that matrix pitch is heated to after 160 DEG C,
Diatomite asphalt modifier is made after adding diatomite, high speed shear 20min.
9. the preparation method of the modified asphalt mixture based on high temperature difference area according to claim 1,2,3 and 4, its
The step of preparation process for being characterised by this method is：(1) it will gather materials and be heated to 160 DEG C ~ 170 DEG C；(2) by stearic acid+palmitic acid/
Expanded perlite binary composite shape-setting phase-change material incorporation heated gather materials in and stir 90 seconds；(3) add in level is matched somebody with somebody and gathered materials
Enter diatomite modified asphalt, then stirred 90 seconds under the conditions of 170 DEG C ~ 180 DEG C, you can obtain the modified asphalt mixture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710196258.7A CN107056118B (en) | 2017-03-29 | 2017-03-29 | A kind of modified asphalt mixture and preparation method thereof based on high temperature difference area |
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| CN201710196258.7A CN107056118B (en) | 2017-03-29 | 2017-03-29 | A kind of modified asphalt mixture and preparation method thereof based on high temperature difference area |
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| CN107056118A true CN107056118A (en) | 2017-08-18 |
| CN107056118B CN107056118B (en) | 2019-06-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546002A (en) * | 2018-06-27 | 2018-09-18 | 长安大学 | A kind of phase-transition heat-preserving asphalt and preparation method thereof |
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| CN102690522A (en) * | 2012-06-18 | 2012-09-26 | 广州市中固建材有限公司 | Rock asphalt composite modifier as well as preparation method and application thereof |
| CN102775966A (en) * | 2012-08-01 | 2012-11-14 | 华东理工大学 | Pearlite based normal-temperature composite phase-change material and preparation method thereof |
| CN103508702A (en) * | 2012-06-17 | 2014-01-15 | 唐伯明 | Cold-mix phase change type asphalt mixture for thermal energy storage |
| CN104609791A (en) * | 2015-01-27 | 2015-05-13 | 建筑材料工业技术监督研究中心 | Phase-change energy-storage dual-limit temperature adjustment mortar and preparation method thereof |
| CN106517894A (en) * | 2016-11-09 | 2017-03-22 | 王丽丽 | Phase change temperature-adjusting asphalt compound material for traffic pavement and preparation method thereof |
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2017
- 2017-03-29 CN CN201710196258.7A patent/CN107056118B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| CN102134829A (en) * | 2011-02-21 | 2011-07-27 | 武汉理工大学 | Self temperature adjustment cold mixing bituminous concrete and preparation method thereof |
| CN102268239A (en) * | 2011-06-10 | 2011-12-07 | 北京博美宏业建材有限公司 | Temperature-self-adjusting and phase-change energy storage material and preparation method thereof |
| CN103508702A (en) * | 2012-06-17 | 2014-01-15 | 唐伯明 | Cold-mix phase change type asphalt mixture for thermal energy storage |
| CN102690522A (en) * | 2012-06-18 | 2012-09-26 | 广州市中固建材有限公司 | Rock asphalt composite modifier as well as preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108546002A (en) * | 2018-06-27 | 2018-09-18 | 长安大学 | A kind of phase-transition heat-preserving asphalt and preparation method thereof |
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| CN107056118B (en) | 2019-06-21 |
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