CN102066495A - Method for preparing an asphalt compound - Google Patents
Method for preparing an asphalt compound Download PDFInfo
- Publication number
- CN102066495A CN102066495A CN200980123533.6A CN200980123533A CN102066495A CN 102066495 A CN102066495 A CN 102066495A CN 200980123533 A CN200980123533 A CN 200980123533A CN 102066495 A CN102066495 A CN 102066495A
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- China
- Prior art keywords
- tackiness agent
- aggregate
- asphalt
- filler
- mixing tank
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- Granted
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 73
- 150000001875 compounds Chemical class 0.000 title claims description 71
- 239000000945 filler Substances 0.000 claims abstract description 57
- 238000002156 mixing Methods 0.000 claims abstract description 57
- 239000011230 binding agent Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000004575 stone Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 105
- 238000002360 preparation method Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 15
- 238000005187 foaming Methods 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 150000002632 lipids Chemical class 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 239000011297 pine tar Substances 0.000 claims description 3
- 229940068124 pine tar Drugs 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 30
- 238000011068 loading method Methods 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
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- 238000004062 sedimentation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- 230000008961 swelling Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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- 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
- E01C7/262—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 with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
-
- 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
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
- E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/20—Mixtures of bitumen and aggregate defined by their production temperatures, e.g. production of asphalt for road or pavement applications
- C08L2555/24—Asphalt produced between 100°C and 140°C, e.g. warm mix asphalt
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/50—Inorganic non-macromolecular ingredients
- C08L2555/52—Aggregate, e.g. crushed stone, sand, gravel or cement
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C2019/1081—Details not otherwise provided for
- E01C2019/109—Mixing containers having a counter flow drum, i.e. the flow of material is opposite to the gas flow
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Machines (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a method for preparing an asphalt mixture in a mixer (15). According to the invention, the method comprises the steps of, loading a dry aggregate comprising stone material principally free from filler into the mixer (15), thereafter loading a foamed binder mixture into the mixer (15) that contains said dry aggregate, which binder mixture is foamed when it leaves a prefoaming chamber (12) and is loaded into the mixer (15), whereupon mixing of said aggregate and said foamed binder mixture takes place, and thereafter loading a filler (6) into the mixer (15), whereupon final mixing of the asphalt mixture takes place.
Description
Technical field
The present invention relates to a kind of method and mixing tank that is used to prepare asphalt (asphalt mixture), this asphalt is used for intermediate store subsequently, and paves in the future on road etc.The present invention be more particularly directed to a kind of method and mixing tank that is used to prepare so-called hot asphalt mixture.
Background technology
Pitch is the compound of stone material (stone material)/aggregate (aggregate) and tackiness agent (binder) basically, and is used as upper layer, key coat and/or basic unit on for example road, airport, the parking place etc.The traditional preparation process method of so-called hot asphalt mixture comprises is heated near 160 ℃ aggregate, and whole aggregates are placed in the mixing tank, and the tackiness agent of process heating is provided with liquid form then.After this, under about 160 ℃ of processing temperatures, asphalt is mediated to the final stickiness that is used for intermediate storage subsequently and paves in the future.Though than the temperature asphalt mixture (preparation temperature approximately is 70-120 ℃) of attempting preparation before and so-called cold asphalt (be equipped with temperature and be lower than 70 ℃), usually hot asphalt mixture has better characteristic, but, the preparation hot asphalt mixture consumes energy very much, and in the process of the preparation and the hot asphalt mixture that paves, can discharge a large amount of nitrogen oxides and carbonic acid gas, this is deleterious to environment, and makes workman's pitch that paves in bad working environment.
Therefore, target for a period of time is under the prerequisite of not damaging the bituminous quality that paves, be mixed with temperature with lower limit by reducing heated bitumen, make prepared hot asphalt mixture have and have similar characteristic to traditional heated bitumen prepared near 160 ℃ the time near hot asphalt mixture.
EP 1,398,351B1 discloses a kind of method temperature and asphalt heat of being devoted to prepare, all aggregate is loaded in the mixing tank in the method, to be added to the whipping agent of the form of polymeric lipid acid in the pitch (bitumen) through heating, then the tackiness agent compound that obtains be added in the described aggregate as foam.US 05/0018530A1 discloses a kind of method of being devoted to prepare the hot asphalt mixture of low-temperature region, in the method aggregate is added in the asphalt with two portions.More precisely, substantially there is not the dried aggregate of fine material to be added in the mixing tank with first part, add the pitch through the liquid state of heating subsequently, the wet aggregate that after this will comprise water, sand and fine material is added in the mixing tank, makes pitch self-expanding (self expand) then.But, can be because some passive characteristics and impaired according to asphalt that these technologies finally obtained.Maximum passive characteristic is, the fine material in filler in the EP-document and the US-document can absorb a large amount of pitch or pitch compound, because when pitch or pitch compound during in foaming/self inflation, filler is present in the asphalt.When with such bituminous mixture laying on road the time, proportional a spot of pitch/pitch compound will adhere to the building stones in the aggregate, and proportional a large amount of pitch/pitch compound will adhere to fine material or filler.When use paved pitch, the pitch/pitch compound that adheres to fine material or filler had by the danger of tearing from pitch rapidly.Therefore, can not prepare the hot asphalt mixture that has the characteristic similar at for example aspect such as wearing quality, tackiness according to these methods to the traditional hot asphalt.
Summary of the invention
The present invention is in order to eliminate the above-mentioned deficiency and the defective of method that is used to prepare asphalt of previously known, a kind of improved method to be provided.Main purpose of the present invention provides a kind of improved method for preparing the asphalt of original definition, this method provide near the preparation of the lower limit temperature of hot asphalt mixture, have similar or than the asphalt of the better characteristic of the traditional hot asphalt mixture existence, rigidity/toughness etc. of bituminous wearing quality, tackiness, cavity (for example, pave) to traditional hot asphalt mixture.
Another object of the present invention provides a kind of by reducing the method that dust discharge sends less smoke and smell.
Another object of the present invention provide the lower and carbonic acid gas of a kind of because energy consumption and discharged nitrous oxides less, thereby to environment and Working environment advantageous method.
Another object of the present invention provides a kind of method that the asphalt of the work of being easier to (comprise preparation and pave) is provided.
According to the present invention, at least main purpose is that method by original definition realizes, it is characterized in that, this method may further comprise the steps: the dried aggregate that will comprise the stone material that does not have filler substantially adds in the mixing tank, then the tackiness agent compound adding with foaming comprises in the mixing tank of described dried aggregate, described tackiness agent compound is when leaving the pre-frothing chamber and add in the described mixing tank, described tackiness agent compound is foamed, the tackiness agent compound that mixes described aggregate and described foaming afterwards, then filler is added in the mixing tank, and described asphalt is carried out final mixing.
Therefore, the present invention is based on such understanding: before the filler that will absorb in large quantities adds in the asphalt, make the tackiness agent compound be bonded in the building stones of described aggregate with the form of thick layer/coating, this is vital to the pitch of being made by asphalt.
Preferred implementation of the present invention is done further definition in the dependent claims.
In the preferred case, described tackiness agent compound contains the binding agent (adhesion agent) of pitch, lipid acid form and the whipping agent of water form, it can provide firm and persistent foam, this tackiness agent compound is favourable for the asphalt that is easy to work, and this binder blend was bonded in the stone material of described aggregate with the form of thick film before filler adds.
More advantage of the present invention and feature can be clearly from other dependent claims and next draw the detailed description about preferred implementation.
Description of drawings
To the more complete understanding of the present invention's further feature above-mentioned and advantage can be clearly from other dependent claims and next draw in conjunction with the accompanying drawings the detailed description of preferred implementation, wherein:
Fig. 1 is the side-view that schematically shows the selection part of mixing tank of the present invention and asphalt mixing plant;
Fig. 2 is the enlarged diagram according to the vertical view of the mixing tank of Fig. 1.
Embodiment
Main reference Fig. 1 describes.
Asphalt contains the aggregate 1 or the stone material of maximum, and with respect to the gross weight of described asphalt, the content of described aggregate 1 or stone material is generally at least 80 weight %, is preferably about 90 weight %.
Described aggregate further is divided into different particle size fraction (fraction) or size class, and the part particle size fraction contains filler, sand and building stones, 0-2 for example, 0-4,0-8,0-11,0-16 and 0-22; The part particle size fraction only contains sand and building stones, for example 4-8,8-11,11-16 and 16-22 basically.Above-mentioned numeral is represented to allow the net that described aggregate passes through respectively and is not allowed the size in the hole of millimeter of net that described aggregate passes through.The amount of the aggregate of each particle size fraction mainly determined by the end-use of specific asphalt, promptly final pitch will with wherein and the purpose of using what is.In normally used asphalt, only about half of aggregate comes from the particle size fraction (for example 0-4 and 0-8) that comprises filler, and remaining aggregate comes from the particle size fraction that do not have filler substantially (for example 4-8,8-11 and 11-16).
The aggregate 1 of each particle size fraction is stored in the specific raw material silo 2, has shown two raw material silos among the figure.When the asphalt that begins to prepare new batch, will be contained in from the aggregate 1 of each raw material silo 2 predetermined amounts on the conveying belt etc., described aggregate is imported in the moisture eliminator 3.In the embodiment that illustrates, described moisture eliminator 3 is made up of the adverse current rotatory drier, and this adverse current rotatory drier has the angle of downward slight inclination, and can rotate during operation.At run duration, along with the rotation of described adverse current rotatory drier is moved, aggregate 1 is fed into first upper end of described moisture eliminator 3, discharges from second tail end subsequently.In described moisture eliminator 3, described aggregate 1 is exposed at high temperature and is heated between 100 ℃ to 130 ℃, is preferably about 120 ℃, thereby makes described aggregate 1 drying.
In described moisture eliminator 3, wherein, described aggregate 1 was thrown the hot-fluid that produces by the thermal source in the described moisture eliminator 3 with the form of throwing curtain.In throwing the process of curtain, described filler, moisture and waste gas separate with described aggregate 1, and the flue 4 of first upper end by being arranged on described moisture eliminator 3 leaves described moisture eliminator 3.Be provided with the separator 5 that comprises the strainer (not shown) along described flue 4.In described separator 5, filler 6 to be collected, and imported in the filler silo 7, moisture and flue gas have been filtered, and discharge by chimney 8.And, the aggregate that does not have filler is substantially further heated, to reach the temperature of above-mentioned requirements.
Subsequently, will be transported to aggregate silo 10 by elevator 9 grades by the aggregate that the stone material that does not have filler is substantially formed through heating.Described aggregate silo 10 can be arranged to described aggregate through heating is saved as different particle size fraction (that is, as shown in Figure 1, at the separate part of described aggregate silo 10) once more, perhaps is arranged to include only a part.Be arranged to make aggregate by having a plurality of nets in the aperture that reduces gradually described aggregate silo 10, wherein, the described aggregate of certain size can not pass through net subsequently by a net, and imports corresponding size or particle size fraction part in the described aggregate silo 10 then.Therefore, in described aggregate silo 10, minimum particle size fraction accumulates in the left side of Fig. 1 to greatest extent, and maximum particle size fraction accumulates in the right side among Fig. 1 to greatest extent.Described filler 6 is represented the particle less than 0.063 millimeter usually, yet filler 6 can allow big a little, for example less than 0.08 millimeter, and does not influence method of the present invention.In addition, sand and building stones are the parts that have bigger size in the aggregate than described filler, have the size less than 22 millimeters usually, and above are referred to as building stones.It is pointed out that the present invention the most important thing is that described filler 6 contains between heating/dry epoch and described aggregate 1 isolating dust.
Second necessary factor in the asphalt is the tackiness agent compound, and this tackiness agent compound has the effect that in the pitch that in the end makes aggregate is combined.The content of the tackiness agent compound in the described asphalt is the same with the content of aggregate 1 to depend on bituminous purpose and the application that obtains at last, gross weight with respect to described asphalt, the content of described tackiness agent compound is preferably about 5-7 weight % between 3-10 weight %.
According to a preferred embodiment of the invention, described tackiness agent compound contains tackiness agent, binding agent and whipping agent.
The preparation of described tackiness agent compound may further comprise the steps: by conduit 11 described tackiness agent is imported pre-frothing chamber 12.Then described binding agent is added in the conduit 11 of described tackiness agent by be connected the conduit 13 that is provided with conduit 11, in the described pre-frothing chamber 12 of then compound of tackiness agent and binding agent being packed into.In order to mix, afterwards whipping agent is directly packed in the described pre-frothing chamber 12 by conduit 14 with described tackiness agent and described binding agent.Before making described tackiness agent and described binding agent mix in described conduit 11, described tackiness agent is heated to 130-200 ℃, be preferably 180 ℃.Described binding agent and whipping agent preferably have and environmental facies temperature together, make to deal with facility more.
Described tackiness agent preferably is made up of pitch, for example can extract from the pitch of crude oil or natural formation, perhaps can perhaps be made up of the mixture of above-mentioned substance according to known other method preparation of this technical field.The so-called infiltration pitch of preferred use replaces being respectively applied for traditionally emulsion adhesive and the tacky adhesion in cold pitch and the warm pitch.
A kind of tolerance that the pitch of different pitch kinds or pitch compound is classified is so-called perviousness.For different purposes and application, use dissimilar pitch to combine with the different mixtures of aforesaid aggregate.The penetration degree of the pitch of particular type (penetration number) is by under the specific pressure, in the specific time and at a certain temperature, pin is pressed in the pitch sample and records, and recording the degree of depth that described pin reaches is tens millimeters, dmm.Usually, adopting penetration degree is the pitch of 50-430dmm.Often the pitch kind of using has the penetration degree of 160-220dmm.
Add at least 0.6 weight % that binding agent in the described tackiness agent compound accounts for the gross weight of described tackiness agent compound to, and this binding agent contains lipid acid, for example pine tar lipid acid.Add the 1-10 weight % that whipping agent in the described tackiness agent compound accounts for the gross weight of described tackiness agent compound to, be preferably 4-5 weight %.
Equally also 2 the method that relevant the present invention prepares asphalt is described with reference to the accompanying drawings.
Method of the present invention comprises pack into step in the described mixing tank 15 of the aggregate that comprises the stone material that does not have filler substantially.Described aggregate for example is made up of each aggregate size level of predetermined amount, and this each aggregate size level is stored temporarily in the described aggregate silo 10, then described aggregate is done and is mixed, to obtain uniform aggregate compound.In one embodiment, described dried 3 seconds of row of infiltrating.Then, the tackiness agent compound of foaming is packed in the described mixing tank 15, then the tackiness agent compound with described aggregate and described foaming mixes, to obtain thick binder blend layer on each building stones/particle of described aggregate.In one embodiment, the tackiness agent compound of the loading of the tackiness agent compound of described foaming and described foaming carried out for 4 seconds with the mixing of described aggregate.Subsequently filler 6 is packed in the described mixing tank, then described asphalt is carried out last wet mixing, to obtain uniform asphalt.In one embodiment, the loading of described filler 6 carried out for 2 seconds, and described last wet mixing carried out for 16 seconds.The above-mentioned time period is the example at preparation asphalt in the mixing tank 15 of the asphalt mixture that is designed to the 2.5-5 ton.During preparation, the processing temperature in the described mixing tank preferably between 100-120 ℃, more preferably about 110 ℃.Though it is pointed out that according to present definition, hot asphalt mixture that said process provides, the temperature between the border of temperature asphalt mixture and hot asphalt mixture is acceptable.
In Fig. 1, in definite described mixing tank 15 of each aggregate size level of great amount should being packed into, aggregate balance 10a is set below described aggregate silo 10.
Described tackiness agent compound is liquid form in described pre-frothing chamber 12.In the time of in described mixing tank 15 that described tackiness agent compound is packed into, described tackiness agent compound under high pressure (for example, under the pressure of 3-6Bar) is ejected in the described mixing tank 15 by nozzle 16.When described tackiness agent compound reached the barometric point that is present in usually in the described asphalt mixing tank, described tackiness agent compound expanded about 20 times, and produces foam subsequently, and along with the evaporation of whipping agent, described foam will settle down gradually.In remaining most of churning time, described tackiness agent compound preferably remains spumescence to small part.
The tackiness agent compound of foaming is more favourable than liquid tackiness agent compound, also can provide reduction viscosity such as the interim volume that increases, and therefore, the easier and described aggregate of described tackiness agent compound mixes, and distributes more equably on described aggregate.Therefore, under lower energy consumption, on described aggregate, obtained better tackiness agent compound coating.More precisely, the method according to this invention, described tackiness agent forms foam by adding whipping agent.Described whipping agent can be to make heat adhesive form any material of foamy or mixtures of material.Described whipping agent is vital being heated to the swelling capacity of boiling point when above, and preferably is made up of water.The content of whipping agent can minimizings/volatilization in whole preparation and during paving in the described tackiness agent compound, and when paving end, can directly obtain transitable road and without any need for further sclerosis.But, it is pointed out that in the finished product pitch and can comprise, and allow to comprise a certain amount of whipping agent.
Hereinbefore, the purpose of described binding agent is to remove described whipping agent from the building stones of described aggregate, to obtain better bonding or bonding between described tackiness agent and the described aggregate.
In addition, binding agent also demonstrates and can cause described tackiness agent compound foam to have longer lifetime before sedimentation.Further, in mixing tank 15 preparation and when sprawling asphalt, described binding agent has lubricated effect in described asphalt.Therefore, because described binding agent and whipping agent, described asphalt has workability well, and promptly when paving, even if the temperature that paves is lower than 100 ℃, preferably between 80-100 ℃, described asphalt is also filled out envelope easily.
After adding the tackiness agent compound of described foaming, add filler 6 in the described asphalt and preferably account for the 3-8 weight % of described asphalt gross weight.The filler 6 of packing in preparation process in the described mixing tank 15 comprises to small part and described aggregate identical materials, grouan etc. normally, but also can comprise other material.For example, the so-called aggregate that is rich in stone material (in heat-processed can from wherein isolating a spot of filler) need add a certain amount of limestone filler (limestone filler) in the filler 6 the described mixing tank 15 of packing into.Described limestone filler accounts for 50% of described filler 6 in the described mixing tank 15 of packing into usually at most.Other additive that joins in the described filler 6 in the described mixing tank 15 of packing into can be a cellulosic additive, and this cellulosic additive preferably accounts for 1 weight % of described asphalt gross weight at most.
Be to form thick adhesive coating/layer on the building stones at each aggregate with the tackiness agent compound of described foaming and the advantage that do not have the aggregate of filler to add described filler 6 after mixing substantially, follow described filler 6 and enter these coatings, and absorption portion is not adsorbed in the tackiness agent compound in the building stones of described aggregate.This can cause not porous of rainwater in dense pitch, and can produce the danger that destroys pitch or tackiness agent is washed off.By method of the present invention, the asphalt that is obtained provides the filled bitumen with cavity degree of about 3%.
The advantage that another has demonstrated of the present invention is that when joining the pitch that reclaims in the described asphalt in preparation process, the processing temperature in the described mixing tank 15 does not need to raise as usually.
In mixing tank 15 of the present invention, be provided with at least one stir shaft 17 or the stirrer arm 18 of making a plurality of blades.Mixing tank 15 of the present invention preferably includes the stir shaft 17 of two parallel cooperations, and in the container 19 in described mixing tank 15, these two stir shafts are supported each spinning, and in addition, these two stir shafts are arranged to opposite direction rotation.Specifically, the rotation mode of described stir shaft 17 be make described asphalt from the outside/downwards and inboard/move up.Every stir shaft 17 preferably includes 8 blades 18 of paired setting, and every pair blade 18 has mutual distinct position on stir shaft 17.Every stir shaft 17 is set on such horizontal plane for 19 li at container: compare the part that is lower than stir shaft 17, can prepare the asphalt of more volume above it.In addition, blade 18 has the active carrier surface 20 across stir shaft 17, and the axial length of this carrier surface than the big 1.5-4 of width doubly.Each carrier surface 20 preferably extends to described stir shaft 17 from the free outer end of radial, and preferably has uniform cross-sectional area along its length direction.As shown in Figure 2, in described cross section, described carrier surface preferably has smooth and parallel with described stir shaft 17 basically part, and with the part of the sense of rotation R reverse bending of described stir shaft 17.In addition, make each blade 18 must be as scoop in outer end bending freely.Mixing tank of the present invention " promotes and carry " described asphalt and of the prior art only asphalt to be carried out the mixing tank of " kneading " different.
The distortion that the present invention is possible
The present invention is not limited to the main embodiment that illustrates purpose that rises shown in above-described and the accompanying drawing.The purpose of present patent application is whole adjustment and the distortion that covers above-described preferred implementation, therefore uses the literal of accessory claim and equivalent thereof to define the present invention.Therefore, equipment can carry out the distortion of variety of way in the scope of dependent claims.
Such as, described tackiness agent compound can comprise the different additive the additive of mentioning except that top description, wax for example is to obtain the bigger asphalt of rigidity.
It is pointed out that all about/relevant above, below etc. term should explain/equipment of being read as has the guidance quality that accompanying drawing shows, has the accompanying drawing guidance quality that the content of the introducing of making is suitably understood.Therefore, such term only is illustrated in the mutual relationship in the shown embodiment, if equipment of the present invention has other structure/design, such relation can change.
It is pointed out that equally even without the feature of clearly representing a certain specific implementations and can make up with the feature of another kind of embodiment, if but this combination is possible, then this combination will be considered to conspicuous.
Claims (according to the modification of the 19th of treaty)
1. method for preparing asphalt in mixing tank (15) is characterized in that this method may further comprise the steps:
-dried the aggregate that will contain the stone material that does not have filler is substantially packed in the described mixing tank (15);
In-the mixing tank (15) that comprises described dried aggregate of then the tackiness agent compound of foaming being packed into, wherein, the tackiness agent compound leave pre-frothing chamber (12) and the described mixing tank (15) of packing in the time foam, tackiness agent compound with described aggregate and described foaming mixes then, and
In-described the mixing tank (15) of then filler (6) being packed into, and described asphalt carried out final mixing.
2. method according to claim 1, wherein, the treatment temp in the described mixing tank (15) is 100-120 ℃.
3. method according to claim 1 and 2 wherein, in the operation before in described mixing tank that described aggregate is packed into, is heated to 100-130 ℃ with described aggregate, and therefore makes described aggregate drying.
4. method according to claim 3 wherein, is separated from described aggregate in described exsiccant process to the described filler of small part (6).
5. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described asphalt contains the described aggregate of at least 80 weight %.
6. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described asphalt contains the described tackiness agent compound of 3-10 weight %.
7. according to the method described in above-mentioned any claim, wherein, described tackiness agent compound contains tackiness agent, binding agent and whipping agent.
8. method according to claim 7, wherein, the preparation of described tackiness agent compound may further comprise the steps:
-at first described tackiness agent is transported in the described pre-frothing chamber (12) by conduit (11);
In-described the conduit (11) of then binding agent being packed into, in the described pre-frothing chamber (12) of then compound of pitch and binding agent being packed into, and
In-described pre-frothing the chamber (12) of then described whipping agent being packed into.
9. method according to claim 8, wherein, before being transported in described pre-frothing chamber by conduit (11) described tackiness agent, the temperature of described tackiness agent is 130-200 ℃.
10. any described method according to Claim 8-9, wherein, described tackiness agent contains pitch.
11. any described method according to Claim 8-10 wherein, is a benchmark with the gross weight of described tackiness agent compound, described tackiness agent compound contains the binding agent of at least 0.6 weight %.
12. any described method according to Claim 8-11, wherein, described binding agent contains lipid acid, for example pine tar lipid acid.
13. any described method according to Claim 8-12 wherein, is a benchmark with the gross weight of described tackiness agent compound, described tackiness agent compound contains the whipping agent of 1-10 weight %.
14. any described method according to Claim 8-13, wherein, described whipping agent contains water.
15. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described asphalt contains the described filler of 3-8 weight %.
16. according to the method described in above-mentioned any claim, wherein, described filler contains the particle of size less than 0.063mm.
17., wherein, contain and described aggregate identical materials to the described filler of small part according to the method described in above-mentioned any claim.
18. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described filler, described filler contains the limestone filler of maximum 50 weight %.
19. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described filler contains the cellulosic fibre of maximum 1 weight %.
Claims (20)
1. method for preparing asphalt in mixing tank (15) is characterized in that this method may further comprise the steps:
-dried the aggregate that will contain the stone material that does not have filler is substantially packed in the described mixing tank (15);
In-the mixing tank (15) that comprises described dried aggregate of then the tackiness agent compound of foaming being packed into, wherein, the tackiness agent compound leave pre-frothing chamber (12) and the described mixing tank (15) of packing in the time foam, tackiness agent compound with described aggregate and described foaming mixes then, and
In-described the mixing tank (15) of then filler (6) being packed into, and described asphalt carried out final mixing.
2. method according to claim 1, wherein, the treatment temp in the described mixing tank (15) is 100-120 ℃.
3. method according to claim 1 and 2 wherein, in the operation before in described mixing tank that described aggregate is packed into, is heated to 100-130 ℃ with described aggregate, and therefore makes described aggregate drying.
4. method according to claim 3 wherein, is separated from described aggregate in described exsiccant process to the described filler of small part (6).
5. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described asphalt contains the described aggregate of at least 80 weight %.
6. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described asphalt contains the described tackiness agent compound of 3-10 weight %.
7. according to the method described in above-mentioned any claim, wherein, described tackiness agent compound contains tackiness agent, binding agent and whipping agent.
8. method according to claim 7, wherein, the preparation of described tackiness agent compound may further comprise the steps:
-at first described tackiness agent is transported in the described pre-frothing chamber (12) by conduit (11);
In-described the conduit (11) of then binding agent being packed into, in the described pre-frothing chamber (12) of then compound of pitch and binding agent being packed into, and
In-described pre-frothing the chamber (12) of then described whipping agent being packed into.
9. method according to claim 8, wherein, before being transported in described pre-frothing chamber by conduit (11) described tackiness agent, the temperature of described tackiness agent is 130-200 ℃.
10. according to Claim 8 or 9 described methods, wherein, described tackiness agent compound can foam when described pre-frothing chamber (12) is packed into the described mixing tank (15).
11. any described method according to Claim 8-10, wherein, described tackiness agent contains pitch.
12. any described method according to Claim 8-11 wherein, is a benchmark with the gross weight of described tackiness agent compound, described tackiness agent compound contains the binding agent of at least 0.6 weight %.
13. any described method according to Claim 8-12, wherein, described binding agent contains lipid acid, for example pine tar lipid acid.
14. any described method according to Claim 8-13 wherein, is a benchmark with the gross weight of described tackiness agent compound, described tackiness agent compound contains the whipping agent of 1-10 weight %.
15. any described method according to Claim 8-14, wherein, described whipping agent contains water.
16. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described asphalt contains the described filler of 3-8 weight %.
17. according to the method described in above-mentioned any claim, wherein, described filler contains the particle of size less than 0.063mm.
18., wherein, contain and described aggregate identical materials to the described filler of small part according to the method described in above-mentioned any claim.
19. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described filler, described filler contains the limestone filler of maximum 50 weight %.
20. according to the method described in above-mentioned any claim, wherein, be benchmark with the gross weight of described asphalt, described filler contains the cellulosic fibre of maximum 1 weight %.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0801719-6 | 2008-07-21 | ||
| SE0801719A SE532658C2 (en) | 2008-07-21 | 2008-07-21 | Method for preparing an asphalt pulp |
| PCT/SE2009/050860 WO2010011171A1 (en) | 2008-07-21 | 2009-07-02 | Method for preparing an asphalt compound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102066495A true CN102066495A (en) | 2011-05-18 |
| CN102066495B CN102066495B (en) | 2013-09-04 |
Family
ID=41570489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980123533.6A Expired - Fee Related CN102066495B (en) | 2008-07-21 | 2009-07-02 | Method for preparing an asphalt compound |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2303966A4 (en) |
| CN (1) | CN102066495B (en) |
| RU (1) | RU2502760C2 (en) |
| SE (1) | SE532658C2 (en) |
| WO (1) | WO2010011171A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2472995B (en) * | 2009-08-26 | 2013-09-11 | Aggregate Ind Uk Ltd | Half-warm foamed asphalt process |
| KR101045665B1 (en) * | 2011-02-18 | 2011-07-01 | 주식회사 서원 | Mixing equipment of low temperature mix bituminous emulsion asphalt |
| CN102888805B (en) * | 2012-10-30 | 2015-01-07 | 江苏路通筑路机械有限公司 | Asphalt weighing device |
| CA2913125C (en) * | 2013-05-22 | 2021-11-09 | Multivector As | A method, a system and devices for processing at least one substance into a dried, fragmented, fluidized end product |
| NO339255B1 (en) * | 2013-05-22 | 2016-11-21 | Multivector As | Apparatus for swirling at least one fragmented substance |
| JP7432341B2 (en) | 2019-11-08 | 2024-02-16 | 前田道路株式会社 | Asphalt mixture manufacturing method and asphalt plant |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1325916A (en) * | 1970-01-20 | 1973-08-08 | Mobil Oil Corp | Method and apparatus for producing foamed materials |
| US4579458A (en) * | 1981-08-25 | 1986-04-01 | Ohlson Karl G | Method and apparatus for the production of asphalt concrete |
| RU2083643C1 (en) * | 1992-05-14 | 1997-07-10 | Восточный научно-исследовательский углехимический институт | Method for production of mixture of ground mineral material with bituminous binder |
| NO311140B1 (en) * | 2000-02-25 | 2001-10-15 | Kolo Veidekke As | Process and system for the production of a lukewarm foam asphalt and its use |
| NO20034089L (en) * | 2002-09-16 | 2004-03-17 | Shell Int Research | Process for the preparation of asphalt |
| SE525421C2 (en) * | 2002-10-11 | 2005-02-15 | Karl Gunnar Ohlson | Process for the preparation of asphalt pulp and apparatus for its implementation |
| US7114843B2 (en) * | 2003-07-21 | 2006-10-03 | Htp Est | Method of manufacturing a bituminous coated aggregate mix |
| GB2417247A (en) * | 2004-07-24 | 2006-02-22 | Tarmac Ltd | Method of making a bituminous composition |
| NL1030039C2 (en) * | 2005-09-26 | 2007-03-27 | Konink Bam Groep Nv | Improved preparation of an asphalt mix and application thereof. |
-
2008
- 2008-07-21 SE SE0801719A patent/SE532658C2/en unknown
-
2009
- 2009-07-02 WO PCT/SE2009/050860 patent/WO2010011171A1/en active Application Filing
- 2009-07-02 EP EP09800624.0A patent/EP2303966A4/en not_active Withdrawn
- 2009-07-02 CN CN200980123533.6A patent/CN102066495B/en not_active Expired - Fee Related
- 2009-07-02 RU RU2011102024/05A patent/RU2502760C2/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| RU2502760C2 (en) | 2013-12-27 |
| SE0801719L (en) | 2010-01-22 |
| WO2010011171A1 (en) | 2010-01-28 |
| EP2303966A4 (en) | 2014-07-16 |
| RU2011102024A (en) | 2012-08-27 |
| EP2303966A1 (en) | 2011-04-06 |
| CN102066495B (en) | 2013-09-04 |
| SE532658C2 (en) | 2010-03-09 |
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