CN102531471A - Emulsified asphalt, mixed material containing same and road surface formed by mixed material - Google Patents
Emulsified asphalt, mixed material containing same and road surface formed by mixed material Download PDFInfo
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- CN102531471A CN102531471A CN2010106213855A CN201010621385A CN102531471A CN 102531471 A CN102531471 A CN 102531471A CN 2010106213855 A CN2010106213855 A CN 2010106213855A CN 201010621385 A CN201010621385 A CN 201010621385A CN 102531471 A CN102531471 A CN 102531471A
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- emulsified bitumen
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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
- 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
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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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention provides emulsified asphalt, which comprises the following components in percentage by weight: 2.0-4.0 percent of an emulsifier, 60-65 percent of substrate asphalt, 0-4 percent of an optional modifier and a proper amount of water, wherein the emulsifier in the emulsified asphalt comprises the following components in percentage by weight: 23-35 percent of aminated lignin, 23-35 percent of fatty amine and a proper amount of water. The invention further provides an emulsified asphalt cold recycling mixed material prepared from the emulsified asphalt and minerals which are accordant with a grading rule. Relevant early-stage strength and after-construction strength index of a mixed material test piece are excessive to corresponding technological index requirements in relevant rules. The invention further provides a road surface formed by the emulsified asphalt cold recycling mixed material, the strength of the road surface can be formed quickly, and the strength index of a complete core sample which is taken out 2-3 days after molding is completely excessive to corresponding technological index requirement of relevant rules.
Description
[technical field]
The present invention relates to emulsified bitumen, contain the compound of emulsified bitumen and the road surface that forms by this compound.
[background technology]
Bituminous pavement is the main road surface form of highway in China.The design period of high-grade highway is 12～15 years, and the bituminous pavement of building at China's late 1980s and the beginning of the nineties has got into the maintenance phase, and some road surface breakage is quite serious.Therefore, how fast, high-quality ground repairs these road surfaces, guarantees the serviceability rate of existing road, reduces the pollution of the old material in road surface to environment as far as possible, the problem that is at present and in the future to be faced.
Traditional asphalt pavement maintenance mode is that the old asphalt mixture milling is discarded, again the new road surface of making.Though this way has guaranteed the usability of road, depleted asphalt great majority are dropped, and not only cause significant wastage but also be unfavorable for environment protection.For old asphalt mixture, except that bituminous material took place partly to wear out, thicknesses such as sand, stone were gathered materials and are not said inefficacy from performance.Therefore the asphalt pavement regeneration technology is extensively adopted as a kind of technology of environmental protection.
The asphalt pavement regeneration technology has multiple mode, wherein the cold regeneration techniques of emulsified bitumen be use a kind of comparatively widely.The emulsified bitumen cold regeneration mix still is in a more coarse design and application stage at present, does not also form unified standard.In China, still be at present during the highway Large scale construction, to the degree of concern of the maintenance of highway and regenerated using aspect relatively a little less than.Though the cold regeneration techniques of emulsified bitumen was done some researchs and application, because controlling factors such as starting material, method of design, construction technology and weather condition are unreasonable, effect is undesirable.Particularly the emulsified bitumen selection is improper usually can cause the compound undercapacity; And de-emulsification speed is crossed the road surface that can cause slowly after the moulding and is not slowly possessed intensity; Thereby delay the open to traffic time greatly; Have a strong impact on the construction speed in later stage, and cause the early damage on road surface easily, cause the increase of cost and the waste of resource.
Therefore, expectation provides that a kind of stability is better, versatility is stronger, wraps that type is better, early strength is bigger, the emulsified bitumen of longer service life.Simultaneously, expectation provides emulsified bitumen cold regeneration mix that contains this emulsified bitumen and the road surface that is formed by this compound.
[summary of the invention]
One of the object of the invention provides a kind of emulsified bitumen, contains the compound of this emulsified bitumen and the road surface that is formed by this compound.Emulsified bitumen of the present invention has solved the defective of prior art, has that stability is better, versatility is stronger, wraps that type is better, early strength is bigger, the advantage of longer service life.Above-mentioned purpose of the present invention is achieved through following technical scheme:
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein said emulsifying agent contains aminated lignin, fatty amine and water, and according to the weight meter of emulsifying agent, it contains: aminated lignin 23～35%, fatty amine 23～35% and an amount of water.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein said matrix pitch are petroleum pitch, and the penetration degree of wherein said petroleum pitch is 50-120.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein said properties-correcting agent are high molecular polymer.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein said properties-correcting agent is selected from one or more in butadiene-styrene block copolymer, styrene-butadiene rubber(SBR) and the Vilaterm.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein said aminated lignin are the product that is obtained through Mannich reaction by aminated compounds, aldehyde compound and xylogen.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein said aminated lignin are selected from by diethylenetriamine, formaldehyde, broad-leaved pine quality and obtain product and by in the product that Mannich reaction obtains one or more of triethylene tetramine, formaldehyde, needle pine quality through Mannich reaction.
The emulsified bitumen that technique scheme 1 provides according to the present invention, the carbonatoms of wherein said fatty amine are 12-22, and amine groups is primary amine and/or secondary amine.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein the carbonatoms of fatty amine is 16, amine groups is a secondary amine.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein emulsified bitumen also contains pH value regulator, and the pH value scope that wherein adds emulsified bitumen behind the pH value regulator is between 1.5～6.5.
The emulsified bitumen that technique scheme 1 provides according to the present invention, wherein pH value regulator is a hydrochloric acid.
The emulsified bitumen cold regeneration mix that technique scheme 2 provides according to the present invention, wherein said milling material contain first kind milling material and granularity the second kind milling material 9.5-31.5mm scope in of granularity in the 0-9.5mm scope.
The emulsified bitumen cold regeneration mix that technique scheme 2 provides according to the present invention, wherein newly gathering materials is selected from ls, scud, Irish touchstone, sandstone, the grouan one or more.
The emulsified bitumen cold regeneration mix that technique scheme 2 provides according to the present invention, wherein breeze is a ls, wherein particle diameter≤the 0.075mm of ls.
The emulsified bitumen cold regeneration mix that technique scheme 2 provides according to the present invention; The early strength of wherein said compound is by being selected from the parametric representation that loss of brush test mass and/or rut plate are got the core integrity degree; Wherein the loss of brush test mass is not more than 2.0%, and the rut plate is got the core integrity degree and is not less than 80%.
The emulsified bitumen cold regeneration mix that technique scheme 2 provides according to the present invention, the intensity index of wherein said compound, water stability index and/or high-temperature stability index all surmount the relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).
The road surface that technique scheme 3 provides according to the present invention, wherein the emulsified bitumen cold regeneration mix can form surface layer or said any layer below the surface layer down down.
Advantage according to emulsified bitumen of the present invention is: its mineral aggregate that can meet " asphalt highway regeneration techniques standard " (JTG F41-2008) regulation with formate gradation composition mixes and forms the emulsified bitumen cold regeneration mix, and emulsified bitumen cold regeneration mix intensity index, water stability index, high-temperature stability index all surmount relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).Thereby it has versatility.
Advantage according to emulsified bitumen of the present invention also is: its mineral aggregate that just can meet " asphalt highway regeneration techniques standard " (JTG F41-2008) regulation with formate gradation composition with less amount mixes and forms the emulsified bitumen cold regeneration mix, and emulsified bitumen cold regeneration mix intensity index, water stability index, high-temperature stability index all surmount relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).Thereby it has the advantage that reduces cost, wraps better effects if.
Advantage according to emulsified bitumen of the present invention also is: it also has, and stability is better, early strength is bigger and the advantage of longer service life.
The relevant art index request that has all surmounted regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008) by the early strength index, water stability index, the high-temperature stability index that contain the emulsified bitumen cold regeneration mix that with good grounds emulsified bitumen of the present invention forms; Thereby for quick high-quality ground redeck provides the foundation; Effectively utilize the milling material of waiting to keep in repair bituminous pavement, reduced environmental pollution.
The advantage on the road surface that is formed by emulsified bitumen cold regeneration mix according to the present invention is: can form intensity fast behind the pavement construction; Can take out complete core in 2～3 days; And core intensity has surmounted the corresponding index requirement of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008), thereby has guaranteed the serviceability rate of existing road effectively.
[description of drawings]
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art are understood that easily: these accompanying drawings only are used to illustrate technical scheme of the present invention, and are not to be intended to protection scope of the present invention is constituted restriction.Among the figure:
Fig. 1 shows mineral aggregate gradation resultant curve among the embodiment 1.
Fig. 2 shows among the embodiment 1 curve of confirming best water consumption with heavy compacting process.
Fig. 3 shows the cleavage strength curve of emulsified bitumen cold regeneration mix relevant with the emulsified bitumen consumption among the embodiment 1.And
Fig. 4 shows mineral aggregate gradation resultant curve among embodiment 2, embodiment 3, the embodiment 4.
[embodiment]
Fig. 1-4 and following declarative description optional embodiment of the present invention how to implement with instruction those skilled in the art and reproduce the present invention.In order to instruct technical scheme of the present invention, simplified or omitted some conventional aspects.Those skilled in the art should understand that the modification or the replacement that are derived from these embodiments will fall within the scope of the invention.Those skilled in the art should understand that following characteristics can make up to form a plurality of modification of the present invention in every way.Thus, the present invention is not limited to following optional embodiment, and is only limited claim and their equivalent.
Before specific embodiments of the invention is described in detail, at first some terms that use among the present invention are defined.Emulsifying agent is meant and can impels two kinds of immiscible materials to form the material of stable emulsion.The effect of emulsifying agent is the surface tension that reduces disperse phase, assembles each other, condenses to stop drop at the drop surface formation film or the electrostatic double layer of disperse phase.Emulsified bitumen is that pitch is scattered in the aqueous solution that contains emulsifying agent with tiny graininess by two kinds of mutual exclusive materials---the bitumen emulsion that pitch and water make through mechanical dispersion.Emulsified bitumen mainly contains pitch, emulsifying agent, properties-correcting agent and water.Emulsified bitumen can be divided into three types of anionic, cationic and non-ionic types according to particulate institute is electrically charged, according to the de-emulsification speed speed can be divided into again split soon type, in split type and split three kinds on type slowly.The emulsified bitumen that is used for cold regeneration mix is generally positively charged ion and splits type slowly.When emulsified bitumen mixed with mineral aggregate, emulsified bitumen medium pitch particle had electric charge, and it can firmly and equably combine with the mineral aggregate particulate that has opposite charges.This has improved pavement strength, has slowed down the bituminous premature ageing, has prolonged the work-ing life on road surface.In this article mineral aggregate be selected from the milling material, newly gather materials, in breeze and the cement one or more.
In this article, the compound that term emulsified bitumen cold regeneration mix is meant emulsified bitumen and milling material, newly gathers materials, cement, breeze and water form according to a certain percentage.Wherein the milling material is meant the material of after milling, drying and screening, being obtained by bituminous pavement to be keeped in repair.The milling material generally is divided into two grades in first kind of milling material (thin milling material) of 0～9.5mm and second kind of milling material of 9.5-31.5mm (rough mill to dig and expect).Newly gathering materials is meant rubble or the cobble that certain grain size is formed that have that new production comes out, and can be in ls, scud, Irish touchstone, sandstone, the grouan one or more.
One side of the present invention provides a kind of emulsified bitumen; It contains emulsifying agent, matrix pitch, optional properties-correcting agent and water; According to the weight meter of emulsified bitumen, it contains: emulsifying agent 2.0～4.0%, matrix pitch 60～65%, properties-correcting agent 0～4% and an amount of water.Wherein, preferably, emulsifying agent contains aminated lignin, fatty amine and water, and according to the weight meter of emulsifying agent, it contains: aminated lignin 23～35%, fatty amine 23～35% and an amount of water.Wherein, preferably, aminated lignin is selected from by diethylenetriamine, formaldehyde, broad-leaved pine quality through product that Mannich reaction obtains with by in the product that Mannich reaction obtains one or more of triethylene tetramine, formaldehyde, needle pine quality.Preferably, the carbonatoms of fatty amine is 12-22, and amine groups is generally primary amine and/or secondary amine.More preferably, the carbonatoms of fatty amine is 16, and amine groups is a secondary amine.Wherein, preferably, matrix pitch is that penetration degree is the petroleum pitch of 50-120, for example 70# petroleum pitch.For example more preferably be shell 70# petroleum pitch or Zhenghai 70# petroleum pitch.Wherein, preferably, properties-correcting agent is to be selected from SBS, SBR and the Vilaterm one or more, and wherein SBS is a butadiene-styrene block copolymer, and SBR is a styrene-butadiene rubber(SBR).In emulsifying agent according to the present invention and emulsified bitumen, alternatively, water is common drinking water.
Another aspect of the present invention provides a kind of emulsified bitumen cold regeneration mix that contains above-mentioned emulsified bitumen; It contains the milling material, newly gather materials, optional breeze, optional cement, emulsified bitumen and add water; According to the weight meter of emulsified bitumen cold regeneration mix, it contains: milling material 60～95%, cement 0～2%, breeze 0～5%, emulsified bitumen 3.0～5.0%, add water 1～4% and an amount of newly gathering materials.This compound has early strength, water stability ability and high-temperature behavior preferably, and its construction back intensity surpasses relevant art index request of " asphalt highway regeneration techniques standard " (JTG F41-2008) regulation.
Another aspect of the present invention provides a kind of above-mentioned Preparation of Emulsification Asphalt method, and said Preparation of Emulsification Asphalt method comprises the steps:
A: with the preparation soap lye that stirs after 55～60 ℃ water and the mixed of emulsifying agent of the present invention according to design, to the pH value that wherein adds a certain amount of hydrochloric acid adjustment soap lye, according to the needs of engineering, the scope of pH value is generally between 1.5～6.5.
B: with the soap lye for preparing among the step a with being positioned over after the tinfoil sealing in about 55 ℃ constant temperature oven behind about 2h, again in soap lye according to the pitch (adding stablizer in case of necessity) of 130～140 ℃ of design proportion addings and stir or/and properties-correcting agent.
C: the solution for preparing among the step b is promptly made emulsified bitumen after through the emulsified bitumen colloidal mill.
The preparation method that a kind of above-mentioned emulsified bitumen cold regeneration mix is provided on the one hand again of the present invention, the preparation method of said emulsified bitumen cold regeneration mix comprises the steps:
Step 1: analyze the milling material;
Step 2: design mineral aggregate gradation;
Step 3: preparation emulsified bitumen;
Step 4: early strength test;
Step 5: confirm best water consumption;
Step 6: confirm the optimum emulsification asphalt content; And
Step 7: form the emulsified bitumen cold regeneration mix based on best water consumption of confirming and optimum emulsification asphalt content.
In above-mentioned steps 1, analysis milling material is meant milling material sampling oven dry back screening stepping, generally is divided into thin milling material of 0-9.5mm and 9.5-31.5mm and rough mills two grades in plane material, analyzes and rough mills the grating of digging material and thin milling material.In one embodiment of the invention, the sampling of milling material is meant and adopts special-purpose milling planing machine that old asphalt pavement is carried out the milling sampling.
In above-mentioned steps 2; The design grating is to the milling material, newly gather materials, cement, breeze carry out level according to a certain percentage and fits in, and requires formate gradation composition to meet the grading limit requirement of " asphalt highway regeneration techniques standard " (JTG F41-2008) middle emulsified bitumen cold regeneration mix.In the specific embodiment of the present invention, provided the milling material, newly gathered materials and a preferred embodiment of cement formate gradation composition, like table 2 with shown in Figure 1.Need to prove; If the milling material, newly gather materials, the formate gradation composition of cement, breeze meets the grading limit requirement of emulsified bitumen cold regeneration mix in " asphalt highway regeneration techniques standard " (JTG F41-2008); Then as long as according to its component content in above-mentioned emulsified bitumen cold regeneration mix, mineral aggregate just can just can form according to emulsified bitumen cold regeneration mix of the present invention with emulsified bitumen and water.
In above-mentioned steps 3, the preparation emulsified bitumen sees also above-mentioned Preparation of Emulsification Asphalt method.
In above-mentioned steps 4, the test of the early strength of emulsified bitumen cold regeneration mix is divided into the brush test and the rut plate is got the core test.The brush test is meant: the test specimen that 1) adopts gyratory compaction method forming diameter 150mm, high 75～85mm; 2) then with test specimen be placed on 25 ℃ (degree centigrade), place about 4h in the climatic chamber (for example, the climatic chamber of LHS-100CL model) of 70% humidity and carry out health; 3) at last this test specimen is for example being rotated 40 times under 1.25 ° of outer corners and the 600KPa test conditions condition." asphalt highway regeneration techniques standard " (JTG F41-2008) requires emulsified bitumen cold regeneration mix brush test mass rate of loss≤2.0%.The rut plate is got the core test and is meant: 1) trial-production thickness is the rut plate of 10cm, and wherein this rut plate rolls at twice and forms, and roll thickness is 5cm at every turn, and the mode that rolls is operated according to " pitch and asphalt testing regulation "; 2) will manufacture experimently good rut plate and in 25 ℃, the climatic chamber of 70% humidity, place about 24h; 3) at last the rut plate is got core." asphalt highway regeneration techniques standard " (JTG F41-2008) requires the rut plate to get the integrity degree of core >=80%.
In above-mentioned steps 5; Confirm that best water consumption is meant according to emulsified bitumen cold regeneration mix primary election grading method; Emulsified bitumen content is decided to be about 4%; Add water consumption and adopt 1.0%, 1.5%, 2.0%, 2.5%, 3.0% respectively, hit the solid yardage method, carry out best water consumption test according to the heavy type of stipulating among " highway earthwork test rule " (JTG E40-2007) T 0131-2007; And curve plotting, the water consumption that the maximum dry density of emulsified bitumen cold regeneration mix test specimen is corresponding is as best water consumption.In a specific embodiment of the present invention, provided instance of definite best water consumption, like table 5 and shown in Figure 2.
In above-mentioned steps 6; Confirm that the optimum emulsification asphalt content is meant the best water consumption of confirming according to heavy compacting process; In the 3.0%-5.0% scope according to the content of 0.5% amplification adjustment emulsified bitumen; Form 5 kinds of emulsified bitumen cold regeneration mixes, and be molded into 5 kinds of corresponding emulsified bitumen cold regeneration mix test specimens.Emulsified bitumen cold regeneration mix specimen molding method adopts the gyratory compaction method, and its test conditions is 1.25 ° of outer corners, 600kPa, gyratory compaction number of times 40 times.Emulsified bitumen cold regeneration mix test specimen after the moulding carries out health according to the health-preserving method of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008); After finishing, health carries out 15 ℃ of dried splittings and immersion split test; Under voidage and the prerequisite of cleavage strength, be the optimum emulsification asphalt content with 15 ℃ of pairing emulsified bitumen consumptions of immersion cleavage strength peak than satisfied " asphalt highway regeneration techniques standard " (JTG F41-2008).
In above-mentioned steps 7; Be meant based on best water consumption of confirming and optimum emulsification asphalt content formation emulsified bitumen cold regeneration mix: the mineral aggregate that step 2 is designed is in mixing pot behind normal temperature dry mixing 15～45s; Stir 30～60s after adding in mineral aggregate that best water consumption that step 5 obtains is pairing and adding water consumption, add the emulsified bitumen of the optimum amount that step 6 obtains afterwards again and stir 30～60s and promptly obtain the emulsified bitumen cold regeneration mix.
Of the present inventionly provide on the one hand a kind of according to the method for testing performance of the emulsified bitumen cold regeneration mix of method preparation as stated again again, said detection method comprises the steps:
Step I: will be molded into test specimen and test specimen is carried out health according to the emulsified bitumen cold regeneration mix of method preparation as stated; Performance to test specimen detects from intensity, water stability and three aspects of high-temperature stability subsequently; Wherein work as its intensity and water stability and meet under the prerequisite of " asphalt highway regeneration techniques standard " (JTG F41-2008) performing step II;
In above-mentioned steps I: " asphalt highway regeneration techniques standard " (JTGF41-2008) in concrete regulation to the check of ruggedness test and water stability following:
1). ruggedness test
15 ℃ of cleavage strength >=0.6MPa (15 ℃ of cleavage strength >=0.4MPa of regulation and stipulation basic unit and subbase, following surface layer >=0.5MPa).
Marshall stability >=7KN (regulation and stipulation basic unit and subbase Marshall stability >=5KN, following surface layer >=6KN).
2). the water stability check
Do wet cleavage strength than >=85%, (regulation and stipulation >=75%)
Marshall residual stability MS0 >=85%, (regulation and stipulation >=75%)
The freeze thawing split test, strength ratio TSR >=80%.(regulation and stipulation >=70%)
3). the high-temperature stability check
The wheel tracking test dynamic stability test, 60 ℃ of rut dynamic stability >=1000 time/mm; (standard is not done requirement)
Step II: be transported to after will the batching plant production of emulsified bitumen cold regeneration mix that the scene paves, the roller-compaction road surface through special use according to the preparation of method as stated; Then the road surface of roller-compaction is got core and the core of obtaining is carried out core integrity degree and cleavage strength detection.
In above-mentioned steps II, typical case's scheme of rolling is seen table 1.
Table 1 emulsified bitumen cold regeneration mix rolls scheme
| Roll the stage | Street roller type and quantity | Roll mode and pass | The observation rolling speed |
| First pressing | 10～13 tons of dual-steel wheel road rollers (1～2) | Before |
About 4.0km/h |
| The multiple pressure | Dual-steel wheel road roller more than 20 tons (1～2) | Shake by |
About 4.0km/h |
| Final pressure | Pneumatic-tired rollers more than 26 tons (1～2) | |
About 3.5km/h |
Under the fine condition; After rolling completion, the road surface that forms after adopting emulsified bitumen of the present invention to be rolled by this scheme of rolling gets final product open to traffic; Complete core can be taken out in 2～3 days and overcoat can be overlayed, and the 15 ℃ of cleavage strength >=0.5MPa of core that take out after 3 days, reach surface layer requirement down." asphalt highway regeneration techniques standard " (JTG F41-2008) then requires is open to traffic after 1 day, takes out complete core at least 7 days and overlays cover, and core intensity is not done requirement.
The project profile of present embodiment is: the test paragraph of emulsified bitumen cold regeneration mix is Fengxian, Shanghai City district Xin Linlu, and the emulsified bitumen cold regeneration mix is positioned at surface layer down, and design thickness is 8cm, and the enforcement paragraph is K2+560-K3+700.Xin Linlu is the east-west Class III highway in Fengxian district, the about 40km/h of design speed.
(1) analyzes milling material design mineral aggregate gradation
According to above-mentioned step 1; Adopt the milling planing machine of for example tieing up special root W2000 model to treat the maintenance bituminous pavement and carry out the milling sampling; Then the milling material of obtaining is put into electric oven (like the Binder baking oven) and under about 60 ℃ of left and right sides temperature, dry, adopt the 9.5mm mesh screen to be divided into the thin milling material that digs material and 0～9.5mm of rough milling of 9.5～26.5mm subsequently.Then No. 32.5 cement of ls, normal silicate with the thickness milling material of obtaining and 10～25mm synthesize the mineral aggregate formate gradation composition according to ratio as shown in table 2; Synthetic mineral aggregate formate gradation composition is analyzed according to the sieve of 12 kinds of size of mesh as shown in table 2, and table 2 and Fig. 1 show grade a material screen branch result and a formate gradation composition.Can know by table 2 and Fig. 1; The mineral aggregate formate gradation composition is positioned between the grating upper limit and grating lower limit of " asphalt highway regeneration techniques standard " (JTG F41-2008) requirement; Particulate mineral aggregate gradation after for example screening for the sieve aperture through 2.36mm is 30.19%; Fallen between the 15-45% of code requirement, similarly for also having fallen into respectively in the scope of code requirement through the mineral aggregate gradation after the sieve aperture screening of 4.75mm and 9.5mm.This shows like table 2 and mineral aggregate gradation meet the specifications requirement shown in Figure 1.The mixed emulsified bitumen cold regeneration mix of mineral aggregate and the performance test thereof of emulsified bitumen and above-mentioned grating according to an embodiment of the invention will be described below.
Each grade of table 2 material screen branch result and level fit in
(2) emulsified bitumen formulating of recipe and preparation
Table 3 shows different emulsified bitumen formulating of recipe, and wherein, among the prescription A: first kind splits the fast type emulsifying agent that coagulates slowly is that the sensible chemical plant of the high and steep qi in Jiangyin City JQT-2 type splits emulsifying agent slowly; Among the prescription B: second kind splits the fast type emulsifying agent that coagulates slowly is that Rongcheng, the Jiangyin City road and bridge material technology RC-SFRHJ803 of development corporation, Ltd. splits the fast type emulsifying agent that coagulates slowly; Prescription C is an emulsified bitumen prescription of the present invention, and wherein the third splits slowly that fast to coagulate the type emulsifying agent be according to emulsifying agent of the present invention.In above-mentioned 3 kinds of prescriptions, matrix pitch is Zhenghai 70# pitch, and water is common drinking water.Wherein the prescription according to emulsifying agent of the present invention is: 26% by diethylenetriamine, formaldehyde, broad-leaved pine quality through Mannich reaction obtain aminated lignin, 33% carbonatoms is that 16 amidos are the fatty amine of secondary amine and 41% water.
The Preparation of Emulsification Asphalt method of above-mentioned three kinds of prescriptions is following: the configuration soap lye stirs after emulsifying agent proportionally mixes among Jiang Shui and three kinds of prescriptions A, B, the C under 58 (± 2 ℃) ℃ temperature; The concentrated hydrochloric acid that then adds normal temperature is adjusted into their pH about 2.0.Subsequently with the soap lye that configures with about 2h in the thermostat container that is positioned over about 55 ℃ for example LHS-100CL model after the tinfoil sealing after, again in soap lye according to Zhenghai 70# pitch of separately ratio adding 135 (± 2 ℃) ℃ and stir.Then the solution that configures is promptly made emulsified bitumen after through the emulsified bitumen colloidal mill.
The different emulsified bitumen formulating of recipe of table 3
In three kinds of emulsified bitumen prescriptions shown in the table 3, emulsifying agent consumption of the present invention is minimum.
(3) early strength test
With the emulsified bitumen of above-mentioned three kinds of prescriptions respectively according to 4.0%; Adding the ratio of water 2.0% and the mineral aggregate of above-mentioned grating mixes and stirs in gilson MA-67F mixing device; The mode of mixing and stirring is under the normal temperature behind the about 30s of mineral aggregate dry mixing; Stir about 45s after adding in mineral aggregate that best water consumption that step 5 obtains is pairing and adding water consumption; Add the emulsified bitumen of the optimum amount that step 6 obtains afterwards again and stir about 45s and promptly obtain the emulsified bitumen cold regeneration mix; With TROXLER 4141 type rotary compactors externally be molded into respectively under 1.25 ° at angle and the 600KPa test conditions diameter 150mm, high by 78 (± 2mm) test specimen of mm, rotation times is 40 times, these test specimens is placed about 4h carry out health in 25 ℃, the climatic chamber of the LHS-100CL model of 70% humidity; And carry out brush test and rut plate respectively and get the core test, test-results is seen table 4.
The different emulsified bitumen prescription of table 4 cold regeneration mix early strength test-results
| The emulsified bitumen prescription | Brush test mass loss (%) | The rut plate is got core integrity degree (%) |
| Prescription A | 4.8 | 64.3 |
| Prescription B | 4.2 | 73.6 |
| Prescription C | 1.5 | 85.7 |
Test-results shows; Although the emulsifier content in the emulsified bitumen of the present invention all lacks than the content of corresponding emulsifying agent in its prescription prescription; But the early strength of emulsified bitumen cold regeneration mix of the present invention is best; The loss of its brush test mass is approximately 1.5%, and it is about 85.7% that its rut plate is got the core integrity degree, satisfies the requirement of the early strength of emulsified bitumen cold regeneration mix.
(4) best water consumption confirms
Confirm that according to best water consumption in the above-mentioned steps 5 method makes an experiment, and draw a diagram (like table 5 and shown in Figure 2).Can know the test-results according to emulsified bitumen cold regeneration mix test specimen of the present invention by table 5 and Fig. 2, when emulsified bitumen cold regeneration mix water cut was 3.41%, emulsified bitumen cold regeneration mix test specimen dry density was maximum.Thereby the pairing best water consumption of emulsified bitumen cold regeneration mix of the present invention is about 3.41% in this project.
Table 5 emulsified bitumen cold regeneration mix of the present invention test specimen dry density test result
(5) best asphalt content confirms
Table 6 density measurement result
Table 7 cleavage strength test-results
But by the test-results preliminary judgement of table 6, table 7 and Fig. 3, when the emulsified bitumen consumption was 4.0%, 15 ℃ of dried intensity and 15 ℃ of immersion cleavage strengths maximums of splitting of the cold reconstituted mixt of emulsified bitumen of back formation were closed in itself and design level compounding as shown in table 2.Thereby, be about 4% to the optimum emulsification asphalt content of the mineral aggregate formate gradation composition shown in the table 2.Test based on above-mentioned definite optimum emulsification asphalt content; After the conversion, the emulsified bitumen cold regeneration mix contains following component by weight: the milling material is about 83.57%, the ls (newly gathering materials) of 10～20mm is about 9.39%, cement is about 0.94%, add water about 2.1% and emulsified bitumen about 4.0%.
6) Performance Detection of compound
To adopting the emulsified bitumen cold regeneration mix test specimen of design grating, optimum emulsification asphalt content and best water consumption moulding up to specification to carry out freeze thawing split test and wheel tracking test among the embodiment 1, check the water stability ability and the high-temperature behavior of emulsified bitumen cold regeneration mix respectively.
Table 8 freeze thawing split test result
Table 9 wheel tracking test result
Annotate: D in the table
45And D
60Deflection when representing rut test piece test 45 minutes and 60 minutes respectively.
Can know that by table 8 the freeze thawing cleavage strength ratio according to the emulsified bitumen cold regeneration mix test specimen of the embodiment of the invention 1 is 82.9%, (JTGF41-2008) be not less than 70% requirement (for example shown in the specification sheet 5.4.3) far above " asphalt highway regeneration techniques standard ".
Can know that by table 9 the average dynamic stability of wheel tracking test of emulsified bitumen cold regeneration mix test specimen is 1382 times/mm, surpass the high-temperature behavior requirement of surface layer down in " asphalt highway design specifications ".
7) Pavement Performance detects
Being transported to the scene after the full-automatic reworked material of the emulsified bitumen cold regeneration mix employing ARPC400 type mixing station production according to the embodiment of the invention 1 paves; Paver is that Germany produces Fu Gele SUPER-2100 type paver, then adopt 12 tons dual-steel wheel road roller, 22 tons single-drum road roller is strong and 26 tons gluing wheel street roller according to mode as described in Table 1 carry out first pressing, multiple press and final pressure after the roller-compaction road surface.Pavement construction carries out the scene respectively and gets core after accomplishing in 5 day time, detect the integrity degree of core subsequently, and detected result is seen table 10.
Core detected result after table 10 construction is accomplished
Can know by table 10; The emulsified bitumen cold regeneration mix is under fine condition according to an embodiment of the invention; Roll by the scheme of rolling shown in the table 1 and to get final product open to traffic after completion is rolled on the road surface that forms, back; Complete core can be taken out in 2～3 days and overcoat can be overlayed, and 15 ℃ of cleavage strength >=0.5MPa of the core of obtaining after 3 days, reach surface layer requirement down.
Those skilled in the art are understood that easily: surface layer and following any layer of position thereof under emulsified bitumen cold regeneration mix according to the present invention can be competent in the highway pavement structure.
Similarly, embodiment 2, embodiment 3, embodiment 4 carry out according to the step among the embodiment 1 respectively, below are respectively test and the detected result of embodiment 2, embodiment 3, embodiment 4:
Table 11 embodiment 2, embodiment 3, embodiment 4 each grade material screen branch results and level fit in
(2) emulsified bitumen formulating of recipe and preparation
Table 12 embodiment 2, embodiment 3, embodiment 4 emulsified bitumen formulating of recipe
During emulsified bitumen is filled a prescription in three embodiment shown in the table 12; The prescription of the emulsifying agent among the embodiment 2,3 and 4 is: 33% the aminated lignin that is obtained through Mannich reaction by diethylenetriamine, formaldehyde, broad-leaved pine quality, 31% carbonatoms are 16, amido is the fatty amine of secondary amine and 36% tap water.Preparation of Emulsification Asphalt method among above-mentioned three embodiment is following: under 58 (± 2 ℃) ℃ temperature with the water and the configuration soap lye that stirs after the different amounts emulsifying agent proportionally mixes, then add the concentrated hydrochloric acid of normal temperature, their pH is adjusted into about 6.0.Subsequently with the soap lye that configures with about 2h in the thermostat container that is positioned over about 55 ℃ for example LHS-100CL model after the tinfoil sealing after, again in soap lye according to the properties-correcting agent of the shell of separately ratio adding 135 (± 2 ℃) ℃ or Zhenghai 70# pitch and corresponding ratio and type separately and stir.Then the solution that configures is promptly made emulsified bitumen after through the emulsified bitumen colloidal mill.
(3) early strength test
With the emulsified bitumen of emulsified bitumen prescription among above-mentioned three embodiment respectively according to 4.0%; Adding the ratio of water 2.0% and the mineral aggregate of above-mentioned grating mixes and stirs; Shaping test piece (according to the mode among the embodiment 1), and carry out brush test and rut plate respectively and get the core test, test-results is seen table 13.
The different emulsified bitumen prescription of table 13 cold regeneration mix early strength test-results
| The emulsified bitumen prescription | Brush test mass loss (%) | The rut plate is got core integrity degree (%) |
| |
1.85 | 82.1 |
| |
0.93 | 94.5 |
| |
1.35 | 88.7 |
Test-results shows; No matter adopt Zhenghai 70# pitch still to adopt shell 70# pitch; No matter whether adopt properties-correcting agent or adopt which kind of properties-correcting agent among SBS and the SBR; The early strength of emulsified bitumen cold regeneration mix of the present invention is all better, satisfies the requirement of the early strength of emulsified bitumen cold regeneration mix.
(4) best water consumption and best asphalt content confirms
Confirm that according to best water consumption in the above-mentioned steps 5 method of best asphalt content in method and the step 6 adopts the emulsified bitumen prescription among embodiment 2, embodiment 3, the embodiment 4 to make an experiment respectively, draws the optimum moisture content of different embodiment, best asphalt content and character index thereof and sees table 14:
Character index under best water consumption of the different embodiment of table 14 and the optimum emulsification asphalt content
But by the test-results preliminary judgement of table 14, different emulsified bitumen prescriptions are all surmounting the desired character index of standard based on the Marshall stability under best water consumption and the optimum emulsification asphalt content, residual Marshall stability, cleavage strength, dried wet cleavage strength ratio.
Through converting, the shared per-cent of different starting material is seen table 15 respectively among each embodiment:
The shared per-cent of different starting material among each embodiment of table 15
Will according to embodiment 1 described mode form have ratio shown in the table 15, embodiment 2,3 and 4 pairing emulsified bitumen cold regeneration mixes.
6) Performance Detection of compound
Each embodiment freeze thawing split test result of table 16
Each embodiment wheel tracking test result of table 17
Annotate: D in the table
45And D
60Deflection when representing rut test piece test 45 minutes and 60 minutes respectively.
Can know that by table 16 the freeze thawing cleavage strength according to emulsified bitumen cold regeneration mix test specimen of the present invention among each embodiment compares all greater than being 80%, is not less than 70% requirement (for example shown in the specification sheet 5.4.3) far above " asphalt highway regeneration techniques standard " (JTG F41-2008).
Can know that by table 17 the wheel tracking test dynamic stability of emulsified bitumen cold regeneration mix test specimen has surpassed the high-temperature behavior requirement of surface layer down in " asphalt highway design specifications " all greater than 1000 times/mm among each embodiment.
7) indoor rut plate Performance Detection
After embodiment 2, embodiment 3, embodiment 4 emulsified bitumen cold regeneration mix construction completion of the present invention, carry out the scene in 5 day time respectively and get core, detect the integrity degree of core subsequently, detected result is seen table 18.
Core detected result after each embodiment of table 18 constructs and accomplishes
Can know by table 18; Embodiment 2, embodiment 3, embodiment 4 emulsified bitumen cold regeneration mixes are under different weather; Roll by the scheme of rolling shown in the table 1 and to get final product open to traffic after completion is rolled on the road surface that forms, back; Complete core (integrity degree >=80%) can be taken out in 2～3 days and overcoat can be overlayed, and 15 ℃ of cleavage strength >=0.5MPa of complete core after 3 days, reach surface layer requirement down.
Those skilled in the art are understood that easily: surface layer and following any layer of position thereof under emulsified bitumen cold regeneration mix according to the present invention can be competent in the highway pavement structure.
Advantage according to emulsified bitumen of the present invention is: its mineral aggregate that can meet " asphalt highway regeneration techniques standard " (JTG F41-2008) regulation with formate gradation composition mixes and forms the emulsified bitumen cold regeneration mix, and emulsified bitumen cold regeneration mix intensity index, water stability index, high-temperature stability index all surmount relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).Thereby it has versatility.
Advantage according to emulsified bitumen of the present invention also is: its mineral aggregate that just can meet " asphalt highway regeneration techniques standard " (JTG F41-2008) regulation with formate gradation composition with less amount mixes and forms the emulsified bitumen cold regeneration mix, and emulsified bitumen cold regeneration mix intensity index, water stability index, high-temperature stability index all surmount relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).Thereby it has the advantage that reduces cost, wraps better effects if.
Advantage according to emulsified bitumen of the present invention also is: it also has, and stability is better, early strength is bigger and the advantage of longer service life.
The relevant art index request that all surmounts regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008) by the early strength index, water stability index, the high-temperature stability index that contain the emulsified bitumen cold regeneration mix that with good grounds emulsified bitumen of the present invention forms; Thereby for quick high-quality ground redeck provides the foundation; Effectively utilize the milling material of waiting to keep in repair bituminous pavement, reduced environmental pollution.
The advantage on the road surface that is formed by emulsified bitumen cold regeneration mix according to the present invention is: the road surface can form intensity fast; Can take out complete core in 2～3 days; And core intensity surpasses the relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008), thereby has guaranteed the serviceability rate of existing road effectively.
Claims (19)
1. emulsified bitumen, it contains emulsifying agent, matrix pitch, optional properties-correcting agent and water, and according to the weight meter of emulsified bitumen, it contains: emulsifying agent 2.0～4.0%, matrix pitch 60～65%, properties-correcting agent 0～4% and an amount of water.
2. emulsified bitumen according to claim 1 is characterized in that said emulsifying agent contains aminated lignin, fatty amine and water, and according to the weight meter of emulsifying agent, it contains: aminated lignin 23～35%, fatty amine 23～35% and an amount of water.
3. emulsified bitumen according to claim 1 is characterized in that, said matrix pitch is a petroleum pitch, and the penetration degree of wherein said petroleum pitch is 50-120.
4. emulsified bitumen according to claim 1 is characterized in that, said properties-correcting agent is high molecular polymer.
5. emulsified bitumen according to claim 4 is characterized in that said properties-correcting agent is selected from one or more in butadiene-styrene block copolymer, styrene-butadiene rubber(SBR) and the Vilaterm.
6. emulsified bitumen according to claim 1 is characterized in that, said aminated lignin is the product that is obtained through Mannich reaction by aminated compounds, aldehyde compound and xylogen.
7. emulsified bitumen according to claim 6; It is characterized in that said aminated lignin is selected from by diethylenetriamine, formaldehyde, broad-leaved pine quality and obtains product and by in the product that Mannich reaction obtains one or more of triethylene tetramine, formaldehyde, needle pine quality through Mannich reaction.
8. emulsified bitumen according to claim 2 is characterized in that, the carbonatoms of said fatty amine is 12-22, and amine groups is primary amine and/or secondary amine.
9. emulsified bitumen according to claim 8 is characterized in that, the carbonatoms of fatty amine is 16, and amine groups is a secondary amine.
10. emulsified bitumen according to claim 1 is characterized in that, emulsified bitumen also contains pH value regulator, and the pH value scope that wherein adds emulsified bitumen behind the pH value regulator is between 1.5～6.5.
11. emulsified bitumen according to claim 10 is characterized in that, pH value regulator is a hydrochloric acid.
12. emulsified bitumen cold regeneration mix; It contains the milling material, newly gather materials, optional breeze, emulsified bitumen, optional cement and water; Weight meter according to the emulsified bitumen cold regeneration mix; It contains: milling material 60～95%, cement 0～2%, breeze 0～5%, emulsified bitumen 3.0～5.0%, add water 1～4% and an amount of newly gathering materials, it is characterized in that emulsified bitumen is each described emulsified bitumen of claim 1-11.
13. emulsified bitumen cold regeneration mix according to claim 12 is characterized in that, said milling material contains first kind milling material and granularity the second kind milling material 9.5-31.5mm scope in of granularity in the 0-9.5mm scope.
14. emulsified bitumen cold regeneration mix according to claim 12 is characterized in that, newly gathers materials to be selected from ls, scud, Irish touchstone, sandstone, the grouan one or more.
15. emulsified bitumen cold regeneration mix according to claim 12 is characterized in that, breeze is a ls, wherein particle diameter≤the 0.075mm of ls.
16. compound according to claim 12; It is characterized in that; The early strength of said compound is by being selected from the parametric representation that loss of brush test mass and/or rut plate are got the core integrity degree, and wherein the loss of brush test mass is not more than 2.0%, and the rut plate is got the core integrity degree and is not less than 80%.
17. compound according to claim 12; It is characterized in that the intensity index of said compound, water stability index and/or high-temperature stability index all surmount the relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).
18. road surface; It is characterized in that; Said road surface is by forming like each described emulsified bitumen cold regeneration mix of claim 12-17; Can take out complete core in 2～3 days after the said pavement construction moulding, and the intensity index of complete core surmounts the relevant art index request of regulation in " asphalt highway regeneration techniques standard " (JTG F41-2008).
19. road surface according to claim 18 is characterized in that, the emulsified bitumen cold regeneration mix can form surface layer or said any layer below the surface layer down down.
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| CN103073731A (en) * | 2012-12-25 | 2013-05-01 | 江苏博特新材料有限公司 | Preparation method of cold-recycling lignin asphalt emulsifier |
| CN103526665A (en) * | 2013-09-30 | 2014-01-22 | 沧州市市政工程公司 | Accurate preparation method of emulsified asphalt cold recycled mixture |
| CN104130587A (en) * | 2014-07-21 | 2014-11-05 | 武汉理工大学 | Rubber powder modified asphalt composition capsule |
| CN105555887A (en) * | 2013-04-08 | 2016-05-04 | 皇家巴姆集团股份有限公司 | Mastic composition for asphalt mixtures and process for making such a mastic composition |
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| CN108484071A (en) * | 2018-04-08 | 2018-09-04 | 长安大学 | A kind of foamed asphalt cold in place recycling mixture and its grading method and application |
| CN109748538A (en) * | 2019-03-06 | 2019-05-14 | 山东建筑大学 | A kind of flexible rubber Cold Recycled Mixture with Emulsified Asphalt and preparation method thereof |
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| CN103073731A (en) * | 2012-12-25 | 2013-05-01 | 江苏博特新材料有限公司 | Preparation method of cold-recycling lignin asphalt emulsifier |
| CN103073731B (en) * | 2012-12-25 | 2015-05-20 | 江苏苏博特新材料股份有限公司 | Preparation method of cold-recycling lignin asphalt emulsifier |
| CN105555887A (en) * | 2013-04-08 | 2016-05-04 | 皇家巴姆集团股份有限公司 | Mastic composition for asphalt mixtures and process for making such a mastic composition |
| CN103526665A (en) * | 2013-09-30 | 2014-01-22 | 沧州市市政工程公司 | Accurate preparation method of emulsified asphalt cold recycled mixture |
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| CN106047174A (en) * | 2016-06-12 | 2016-10-26 | 甘肃路桥建设集团养护科技有限责任公司 | High-temperature-resistant waterproof emulsified asphalt |
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| CN108484071B (en) * | 2018-04-08 | 2020-11-06 | 长安大学 | Foamed asphalt in-situ cold regeneration mixture and grading method and application thereof |
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