CN106957157B - A kind of fixed phase change heat accumulation cooling ground surface material suitable for high temperature area - Google Patents
A kind of fixed phase change heat accumulation cooling ground surface material suitable for high temperature area Download PDFInfo
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- CN106957157B CN106957157B CN201710196352.2A CN201710196352A CN106957157B CN 106957157 B CN106957157 B CN 106957157B CN 201710196352 A CN201710196352 A CN 201710196352A CN 106957157 B CN106957157 B CN 106957157B
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- phase
- phase change
- high temperature
- expanded perlite
- fixed phase
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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
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
-
- 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
Abstract
The present invention relates to the preparation methods and application method of a kind of fixed phase change heat insulation and heat control ground surface material suitable for high temperature area, it is characterised in that shaping phase-change material is by stearic acid: palmitinic acid: expanded perlite=2:3:2.5 is prepared using vacuum impregnation technology.The application method of fixed phase change heat insulation and heat control ground surface material are as follows: be incorporated into shaping phase-change material as fine aggregate in asphalt, mixture uses the design method of bitumastic.It is suitable for the fixed phase change heat insulation and heat control ground surface material in high temperature area obtained by the present invention, with good cooling and insulating performance, 52.8 DEG C of phase transition temperature, enthalpy of phase change is up to 132J/g, 4.4 DEG C of pavement temperature can be reduced, high temperature area Bituminous Pavement Wheel Rut Question can be effectively solved.
Description
Technical field
The preparation method for the fixed phase change heat accumulation cooling ground surface material that the present invention relates to a kind of suitable for high temperature area and its
Application method.
Background technique
Bituminous pavement is due to comfortable, wear-resisting, easy to maintain etc. excellent with good flatness, comfort, low noise, driving
Point, is widely applied.In China Higher grade road surface, bituminous pavement occupation rate is up to 90%.However, asphalt is
A kind of viscoelastic material, shearing strength and cohesive force are significantly reduced as temperature increases.China's summer universal high temperature, pitch
Easily reach softening point, lead to high temperature unstable failure, wherein using track as main damage form.Existing solution is mostly
Using modified pitch, using matrix type aggregate grading etc. " passive " type measure, be not only added significantly to cost, but also can not be from root
Bituminous pavement high temperature track is solved the problems, such as in sheet.Finding low in cost, good cooling effect the solution of one kind is urgently to solve
Certainly the problem of.
Chinese patent CN101029216A " a kind of self-temperature-adjusting phase-variable material for highway and production method " proposes one kind by fat
Acid, potassium sulfate, chitosan, polyacrylamide, floating bead, shepardite, pyrophyllite, organic silicon emulsion, paraffin and ten kinds of sodium hydroxide
The phase-change material that material is combined in certain mass ratio theoretically analyzes Mechanism of thermal regulating, but does not mention and how to answer
It uses in highway.CN103508701A " a kind of composite phase-change cooling asphalt pavement material " is proposed by coarse aggregate, fine aggregate, is filled out
Heat is made in certain mass ratio without coagulant silica figuration composite phase-changing material, fiber and pitch or modified pitch in material
Mix asphalt.It uses sol-gal process to prepare phase change composite material, long preparation period, stress relaxation, phase-change material
Carrier is silica, but its to take rate in low, percolation ratio is high, is not suitable for large-scale production and application.Both the above material is made
Phase-change material do not encapsulated effectively, phase-change material easily leaks, and greatly affected phase transformation asphalt
Working performance.In addition, both the above patent is not set out the dynamic stability for mixing the asphalt of shaping phase-change material, intensity etc.
The requirement of pavement performance.
Summary of the invention
The purpose of the present invention is to provide a kind of fixed phase change insulation cooling materials applied to high temperature area bituminous pavement
Preparation method and applications method, solve Bituminous Pavement Wheel Rut Question.
To achieve the above object the technical scheme is that a kind of fixed phase change applied to high temperature area bituminous pavement
The preparation method and applications method of insulation cooling material, comprises the following steps:
1. the expansion of expanded perlite
Crude pearlite is being preheated after five minutes under 400 DEG C of temperature environment, is guaranteeing that moisture content reaches expansion requirements
(≤1%), then 30min is roasted at 1000 DEG C, it is crushed after cooling, the partial size of sieving is less than 200 mesh.
2. the preparation of binary shaped composite phase-change material
1. by phase-change material A: phase-change material B: mineral base=2:3:2.5 mass ratio weighs, wherein the phase transformation material
Material A is stearic acid, and phase-change material B is palmitinic acid, and the mineral base is expanded perlite made from step 1；
2. expanded perlite is placed in 120 DEG C of drying boxes dry 1h first, with quality stearic acid: palmitinic acid: expansion is precious
Zhu Yan=2:3:2.5 is put into conical flask, is placed in magnetic agitation pot, is kept stirring in water bath 30min at 90 DEG C, is made phase-change material
Melt and is mixed well with mineral base；
3. after 30min, opening circulating water type vacuum pump, the taper pressure in the bottle being made to be evacuated to 0.01 megapascal.It is complete after 1 hour
At vacuum absorption；
4. closing vacuum pump, conical flask piston is removed, air pressure restores from 0.01 megapascal to atmospheric pressure；
5. after 30min, closing magnetic agitation pot；
6. composite shape-setting phase-change material is placed on filter paper filtered in 90 DEG C of thermostatic drying chambers 24 hours it is extra to filter off
Phase-change material completes preparation.
3. the application method of above-mentioned fixed phase change insulation cooling material is as follows:
By mass ratio shared by each raw material are as follows: coarse aggregate 70%~80%, fine aggregate 9%~20%, miberal powder 8%~
13%, binary figuration composite phase-changing material 4%~8%, pitch 4.7%~5.4%, fiber 0.4%~0.6%, preparation material
It is spare.
Above-mentioned coarse aggregate, fine aggregate are limestone or granite etc., and miberal powder is limestone dust, binary setting composite phase-change
Material is stearic acid+palmitinic acid/expanded perlite, and composite phase-change material is levigate to be sieved with 100 mesh sieve, and pitch is 70# matrix pitch, fine
Dimension is basalt fibre.
To gather materials, miberal powder, fiber are placed in 155 DEG C of baking ovens, drying to constant weight, and the time need to use constant temperature oven less than 6 hours
Pitch is heated to 165 DEG C, is added to during the thickness being preheated gathers materials, is mixed and stirred 60s with mixer, miberal powder and phase transformation material is added
Material, continues to mix and stir 180s, and asphalt is made.
By above-mentioned mixture by testing regulations requirement compaction moulding test specimen, after maintenance demoulding, bituminous pavement setting phase is obtained
Become insulation cooling material, according to standard method compaction moulding marshal piece.
The present invention has following remarkable result
1, this method simple process, it is low in cost, be suitble to large-scale production and application.
2, binary phase-change material is made using stearic acid+palmitinic acid, suitable phase transition temperature, heat accumulation is big, and cooling effect is bright
It is aobvious, use expanded perlite for carrier, load factor is high, can give full play to the characteristic of phase-change material.
3, using vacuum impregnation technology, efficiently solve the problems, such as that phase-change material leaks.
4, the present invention can absorb heat in summer high temperature reduces road table temperature, and heat release reduces asphalt material when low temperature in winter
Temperature sensitivity improves high-temperature stability, effectively solves the problems, such as high temperature track, extend pavement life.
5, since expanded perlite has good thermal insulation, it can effectively stop heat to the biography of sub-surface and roadbed
It passs, be conducive to reduction road surface roadbed overall performance is influenced by high temperature.
Detailed description of the invention
Fig. 1 and Fig. 2 is the present invention with expanded perlite figuration composite phase-changing material made from embodiment 3.
From Fig. 1 this it appears that expanded perlite its be in bulk flocculent structure, have high porosity.Phase transformation in Fig. 2
Material and expanded perlite are compound, ensure that phase-change material is not easy to reveal.
Specific embodiment
The following examples limit the present invention only for further illustrating the present invention.The present invention can be by invention
Any mode described in content is implemented, and present invention will be further explained below with reference to the attached drawings and specific embodiments.
Embodiment 1
Fixed phase change insulation cooling material is by following material composition: coarse aggregate 70%, fine aggregate 10%, miberal powder 9%, binary
Figuration composite phase-changing material 5.7%, pitch 4.9%, fiber 0.4%.
Coarse aggregate, fine aggregate are limestone, and binary figuration composite phase-changing material is stearic acid+palmitinic acid/expanded perlite,
The pitch is 70# matrix pitch, and the miberal powder is agstone, and the fiber is basalt fibre.
Binary figuration composite phase-changing material dries 5h the preparation method comprises the following steps: expanded perlite is placed in drying box, with matter
Amount is than stearic acid: palmitinic acid: phase-change material, mineral base are put into conical flask by expanded perlite=2:3:2.5, are placed in magnetic force and are stirred
It mixes in pot, keeps stirring in water bath at 90 DEG C.Circulating water type vacuum pump is opened after 30min, the taper pressure in the bottle is evacuated to 0.01
Megapascal.After 1 hour, vacuum absorption is completed.Vacuum pump is closed, conical flask piston is removed.After 30min, magnetic agitation pot is closed, it will
Composite phase-change material is placed on filter paper to be filtered 24 hours in 90 DEG C of thermostatic drying chambers.Levigate 100 mesh of mistake after natural cooling,
It is spare.
The application method of above-mentioned fixed phase change insulation cooling material is as follows: thickness being gathered materials, miberal powder, fiber are placed in 155 DEG C
In baking oven, drying to constant weight, the time be 4 hours, pitch is heated to 165 DEG C with constant temperature oven, be added to be preheated it is thick
In fine aggregate, 60s is mixed and stirred with mixer, the binary composite phase-change material of miberal powder and preparation is added, continues to mix and stir 180s, drip is made
Green mixture measures Specifications according to standard method compaction moulding marshal piece.
Above-mentioned mixture is obtained into the setting phase of bituminous pavement after maintenance demoulding by testing regulations requirement compaction moulding test specimen
Become insulation cooling material.
Technology properties are as follows: the phase transition temperature of phase-change material is 52.4 DEG C, latent heat of phase change 119J/g, and does not mix phase transformation
Material test specimen is compared, and for surface of test piece temperature drop up to 3.8 DEG C, dynamic stability is 3210 times/mm.
Embodiment 2
Fixed phase change insulation cooling material is by following material composition: coarse aggregate 70%, fine aggregate 9%, miberal powder 9%, binary
Figuration composite phase-changing material 6.7%, pitch 4.9%, fiber 0.4%.
Coarse aggregate, fine aggregate are limestone: binary figuration composite phase-changing material is stearic acid+palmitinic acid/expanded perlite,
The pitch is 70# matrix pitch, and the miberal powder is agstone, and the fiber is basalt fibre.
Binary figuration composite phase-changing material dries 5h the preparation method comprises the following steps: expanded perlite is placed in drying box, with matter
Amount is than stearic acid: palmitinic acid: phase-change material, mineral base are put into conical flask by expanded perlite=2:3:2.5, are placed in magnetic force and are stirred
It mixes in pot, keeps stirring in water bath at 90 DEG C.Circulating water type vacuum pump is opened after 30min, the taper pressure in the bottle is evacuated to 0.01
Megapascal.After 1 hour, vacuum absorption is completed.Vacuum pump is closed, conical flask piston is removed.After 30min, magnetic agitation pot is closed, it will
Composite phase-change material is placed on filter paper to be filtered 24 hours in 90 DEG C of thermostatic drying chambers.Levigate 100 mesh of mistake after natural cooling,
It is spare.
The application method of above-mentioned fixed phase change insulation cooling material is as follows:
To gather materials, miberal powder, binary sizing meet phase-change material, fiber is placed in 155 DEG C of baking ovens, drying to constant weight, the time
It is 4 hours, pitch is heated to 165 DEG C with constant temperature oven, is added to the thickness being preheated and gathers materials in phase-change material, use
Mixer mixes and stirs 60s, and miberal powder is added, continues to mix and stir 180s, asphalt is made, according to standard method compaction moulding Marshall
Test specimen measures Specifications.
Above-mentioned mixture is obtained into the setting phase of bituminous pavement after maintenance demoulding by testing regulations requirement compaction moulding test specimen
Become insulation cooling material.
Technology properties are as follows: the phase transition temperature of phase-change material is 52.1 DEG C, latent heat of phase change 122J/g, and does not mix phase transformation
Material test specimen is compared, and 4.1 DEG C of surface of test piece temperature drop, dynamic stability is 3381 times/mm.
Embodiment 3
Fixed phase change insulation cooling material is by following material composition: coarse aggregate 70%, fine aggregate 9%, miberal powder 8.5%, and two
First figuration composite phase-changing material 7.2%, pitch 4.9%, fiber 0.4%.
Coarse aggregate, fine aggregate are limestone: binary figuration composite phase-changing material is stearic acid+palmitinic acid/expanded perlite,
The pitch is 70# matrix pitch, and the miberal powder is agstone, and the fiber is basalt fibre.
Binary figuration composite phase-changing material dries 5h the preparation method comprises the following steps: expanded perlite is placed in drying box, with matter
Amount is than stearic acid: palmitinic acid: phase-change material, mineral base are put into conical flask by expanded perlite=2:3:2.5, are placed in magnetic force and are stirred
It mixes in pot, keeps stirring in water bath at 90 DEG C.Circulating water type vacuum pump is opened after 30min, the taper pressure in the bottle is evacuated to 0.01
Megapascal.After 1 hour, vacuum absorption is completed.Vacuum pump is closed, conical flask piston is removed.After 30min, magnetic agitation pot is closed, it will
Composite phase-change material is placed on filter paper to be filtered 24 hours in 90 DEG C of thermostatic drying chambers.Levigate 100 mesh of mistake after natural cooling,
It is spare.
The application method of above-mentioned fixed phase change insulation cooling material is as follows:
To gather materials, miberal powder, binary shaped composite phase-change material, fiber are placed in 155 DEG C of baking ovens, drying to constant weight, the time
It is 4 hours, pitch is heated to 165 DEG C with constant temperature oven, is added to the thickness being preheated and gathers materials in phase-change material, use
Mixer mixes and stirs 60s, and miberal powder is added, continues to mix and stir 180s, asphalt is made, according to standard method compaction moulding Marshall
Test specimen measures Specifications.
Above-mentioned mixture is obtained into the setting phase of bituminous pavement after maintenance demoulding by testing regulations requirement compaction moulding test specimen
Become insulation cooling material.
Technology properties are as follows: the phase transition temperature of phase-change material is 51.9 DEG C, latent heat of phase change 132/g, marshal piece
Up to 4.4 DEG C, dynamic stability is 3509 times/mm for cooling.
Claims (2)
1. a kind of preparation method of the fixed phase change insulation cooling material applied to high temperature area bituminous pavement, it is characterised in that:
Expanded perlite is placed in drying box dry 5h first, with quality than stearic acid: palmitinic acid: expanded perlite=2:3:2.5
Place the material in conical flask, being placed in 90 DEG C of magnetic agitation pots after water-bath 30 minutes to be evacuated to 0.01 megapascal, continue 1 hour
Afterwards, vacuum absorption is completed, vacuum pump is closed, keeps 90 DEG C of water-baths 30 minutes, and the mistake in being subsequently placed at 90 DEG C of thermostatic drying chambers
Filter 24 hours；
The feature of the expanded perlite expansion are as follows: crude pearlite is being preheated after five minutes under 400 DEG C of temperature environment,
Guarantee moisture content≤1%, then roast 30min at 1000 DEG C, is crushed after cooling, the partial size of sieving is less than 200 mesh.
2. the application of fixed phase change insulation cooling material made from preparation method as described in claim 1, it is characterised in that: will
Shaping phase-change material participates in asphalt, and mass percent shared by each ingredient of asphalt is coarse aggregate 70% ~ 80%,
Fine aggregate 9% ~ 20%, miberal powder 8% ~ 13%, binary figuration composite phase-changing material 4% ~ 8%, pitch 4.7% ~ 5.4%, fiber 0.4% ~
0.6%, the sum of above-mentioned each component is 100%；
The coarse aggregate, fine aggregate are limestone or granite, and miberal powder is limestone dust, and binary figuration composite phase-changing material is
Stearic acid+palmitinic acid/expanded perlite, pitch are 70# matrix pitch, and fiber is basalt fibre；The asphalt is adopted
With the design method of SMA bitumastic, wherein Ratio of filler bitumen is 1.6 ~ 1.8.
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| CN107445577B (en) * | 2017-09-21 | 2019-11-01 | 南昌工程学院 | A kind of preparation method and application of the fixed phase change heat insulation and heat control ground surface material suitable for high temperature area |
| CN110510899A (en) * | 2019-09-03 | 2019-11-29 | 中南大学 | A kind of roadbed soil material for frozen earth roadbed protection |
| CN112608072B (en) * | 2020-12-17 | 2022-05-20 | 江苏长路智造科技有限公司 | Asphalt mixture capable of automatically adjusting temperature diseases and preparation method thereof |
| CN112830712A (en) * | 2021-01-19 | 2021-05-25 | 山东交通学院 | Modified asphalt mixture and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102827583A (en) * | 2012-08-03 | 2012-12-19 | 上海英硕聚合材料股份有限公司 | Phase change composite material and preparation method thereof |
| CN102849987A (en) * | 2012-08-14 | 2013-01-02 | 北京建筑工程学院 | Low-emission composite phase-change modified asphalt mixture and preparation method thereof |
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| KR101649052B1 (en) * | 2014-12-26 | 2016-08-31 | 남승규 | Mortar composition comprising rice hull and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102827583A (en) * | 2012-08-03 | 2012-12-19 | 上海英硕聚合材料股份有限公司 | Phase change composite material and preparation method thereof |
| CN102849987A (en) * | 2012-08-14 | 2013-01-02 | 北京建筑工程学院 | Low-emission composite phase-change modified asphalt mixture and preparation method thereof |
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