CN105862544B - A kind of double-layer stress absorption band and preparation method thereof - Google Patents
A kind of double-layer stress absorption band and preparation method thereof Download PDFInfo
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- CN105862544B CN105862544B CN201610362684.9A CN201610362684A CN105862544B CN 105862544 B CN105862544 B CN 105862544B CN 201610362684 A CN201610362684 A CN 201610362684A CN 105862544 B CN105862544 B CN 105862544B
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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
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/10—Packing of plastic or elastic materials, e.g. wood, resin
- E01C11/103—Joints with packings prepared only in situ; Materials therefor
Abstract
The invention belongs to road engineering technical field, it is related to a kind of double-layer stress absorption band and preparation method thereof, the double-layer stress absorption band is equipped with stress absorption asphalt adhesive pulp layer, bottom Fibergrass polyester mat, high resiliency asphalt adhesive pulp layer and top Fibergrass polyester mat successively from bottom to top.It is an object of the invention to provide a kind of double-layer stress absorption band that can solve the problem that Reflective Crack in Asphalt Overlays problem and can lift durability of asphalt pavement and preparation method thereof.
Description
Technical field
The invention belongs to road engineering technical field, is related to a kind of double-layer stress absorption band and preparation method thereof.
Background technology
The reconstruction technology of " morning-night " refers to keep old pavement globality, take grouting reinforcement under plate, local displacement or
The measures such as repairing, the technology of skin coat is then directly overlayed on Old cement concrete.This mode can make full use of
The structure residual intensity of Old cement concrete, thickness is thinned.But the overlay reflection crack that this technology faces
Problem is always one of problem that highway circle is faced.The presence of reflection crack, the bulk strength of pavement structure is not only broken up,
And because surface water permeates downwards along reflection crack, make surface layer is gradually inharmonious to come off, subgrade strength reduces, and has a strong impact on road surface
Service life.
In order to prevent or delay the early reflection crack problem of old cement concrete road Laying Asphalt Surface Course, researcher is old mixed
Coagulate and stress absorbing layer, geotextile interlayer, grid interlayer are provided between dirt road panel and asphalt overlay, but this full paving
The processing method of formula significantly increases construction costs.Talk to penetrating judgment to award with reference to Tongji University and propose to set local soft interlayer to have
Effect reduces the achievement in research of overlay temperature stress, high elastic rubber matizhi stress absorption carrying material is developed, for old
Concrete slab seam and the local disposal in crack, by use for many years, although finding that this material can be to a certain extent
The generation in delayed reflex crack, but without reflection crack can be effected a radical cure, also without the development trend for reversing reflection crack.Use
After a period of time, the defects of due to material itself, stress absorption band comes off with bitumen layer, and this also largely have impact on stress
The performance of absorption band effect.
The content of the invention
In order to solve above-mentioned technical problem present in background technology, it is an object of the invention to provide one kind can solve the problem that drip
Blue or green overlay reflection crack problem and double-layer stress absorption band of durability of asphalt pavement and preparation method thereof can be lifted.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of double-layer stress absorption band, it is characterised in that：The double-layer stress absorption band is equipped with successively from bottom to top should
Power absorbs asphalt adhesive pulp layer, bottom Fibergrass polyester mat, high resiliency asphalt adhesive pulp layer and top Fibergrass polyester mat.
Preferably, stress absorption asphalt adhesive pulp layer of the present invention by stress absorption asphalt binder, miberal powder with
And fine aggregate is prepared；The weight ratio of the stress absorption asphalt binder, miberal powder and fine aggregate is 9：15：76；It is described
The compression rebound modulu of stress absorption asphalt adhesive pulp layer is 200MPa~400MPa, and thickness is 3mm, and width is 0.3~0.4m；Institute
The particle diameter for stating the fine aggregate employed in stress absorption asphalt adhesive pulp layer is no more than 5mm.
Preferably, stress absorption asphalt binder of the present invention is de- by 110# matrix pitches, PE, SBS, illiteracy
Soil, stabilizer and compatilizer are prepared；The 110# matrix pitches, PE, SBS, montmorillonite, stabilizer and compatilizer
Weight ratio is 100：3.2：1.1：10.3：0.2：0.3.
Preferably, high resiliency asphalt adhesive pulp layer of the present invention is by high resiliency asphalt binder, polyester fiber, wood
Quality fiber, miberal powder and fine aggregate are prepared, the high resiliency asphalt binder, polyester fiber, lignin fibre, miberal powder
And the weight ratio of fine aggregate is 13：0.25：0.1：15：71.65；The compression rebound modulu of the high resiliency asphalt adhesive pulp layer is
300~500MPa, thickness 3mm, width are 0.3~0.4m；Fine aggregate employed in the high resiliency asphalt adhesive pulp layer
Particle diameter is no more than 5mm.
Preferably, high resiliency asphalt binder high resiliency asphalt binder of the present invention is dripped by 110# matrix
Green grass or young crops, rubber powder, SBS, kir, epoxy resin, stabilizer and compatilizer are prepared；The 110# matrix pitches, rubber
Powder, SBS, kir, epoxy resin, the weight ratio of stabilizer and compatilizer are 100：25：3：0.5：0.5：0.3：0.3；Institute
State the rubber powder that rubber powder is 200 mesh.
A kind of method for preparing foregoing double-layer stress absorption band, it is characterised in that：Methods described include with
Lower step：
1) stress absorption asphalt adhesive pulp layer is prepared：
1.1) prepare stress absorption asphalt binder：
1.1.1 110# matrix pitches) are heated to 150 DEG C~160 DEG C；
1.1.2) montmorillonite addition：3h is dried in montmorillonite in 100 DEG C, vacuum environment, is cooled down after drying in drier standby
With；Under conditions of 150 DEG C~160 DEG C, by montmorillonite add step 1.1.1) in heat after 110# matrix pitches in, stirring
Speed is mixed under conditions of 500r/min, to add montmorillonite while stirring, ensureing to add montmorillonite within 10min；Then again
High speed shear is carried out with high-speed shearing emulsion machine, temperature control is at 150 DEG C~160 DEG C, shear rate 5000r/min, shearing
10min obtains the first compound；
1.1.3) SBS additions：Under conditions of 165 DEG C~175 DEG C, SBS is added to 1.1.2) be prepared first
In compound, high speed shear is carried out using emulsification pretreatment machine, 15min is stirred under conditions of shear rate is 5000r/min, obtains
To the second compound；
1.1.4) PE additions：Under the conditions of 165 DEG C~175 DEG C, PE is added to 1.1.3) be prepared second mixing
In material, high speed shear is carried out using emulsification pretreatment machine, 20min is stirred under conditions of shear rate is 5000r/min, obtains the
Three compounds；
1.1.5) stabilizer addition：Under the conditions of 165 DEG C~175 DEG C, stabilizer is added to 1.1.4) be prepared
In 3rd compound, high speed shear is carried out using emulsification pretreatment machine, stirred under conditions of shear rate is 5000r/min
15min, obtain the 4th compound；
1.1.6) compatilizer addition：Under the conditions of 165 DEG C~175 DEG C, compatilizer is added to 1.1.5) be prepared
In 4th compound, high speed shear is carried out using emulsification pretreatment machine, stirred under conditions of shear rate is 5000r/min
15min, then under conditions of stir speed (S.S.) is 1000r/min, 30min is stirred, obtains stress absorption asphalt binder；
1.2) the stress absorption asphalt binder that step 1.1) is prepared is heated to 165 DEG C~175 DEG C, by fine aggregate
180 DEG C~190 DEG C are heated to, the stress absorption asphalt binder that step 1.1) is prepared is added in fine aggregate and mixed and stirred
1min, then add miberal powder and mix and stir 1min, obtain stress absorption asphalt adhesive pulp layer, the stress absorption asphalt mastic that will be prepared
Layer is incubated under conditions of 165 DEG C~175 DEG C；
2) high resiliency asphalt adhesive pulp layer is prepared：
2.1) high resiliency asphalt binder is prepared；
2.1.1 110# matrix pitches) are heated to 175 DEG C~185 DEG C；
2.1.2) rubber powder addition：Under the conditions of 175 DEG C~185 DEG C, by rubber powder add step 2.1.1) in heat after
110# matrix pitches in, using emulsification pretreatment machine carry out high speed shear, shear rate be 3000r/min under conditions of stir
60min, obtain the 5th compound；
2.1.3) kir addition：The temperature of 5th compound is maintained at 180 DEG C~190 DEG C, in step 2.1.2) system
Kir is added in standby the 5th obtained compound, is stirred under conditions of 180 DEG C~190 DEG C using electrodeless constant speed stirring instrument,
Stir speed (S.S.) is 2000r/min, and stirring 20min obtains the 6th compound；
2.1.4) SBS additions：Under conditions of 180 DEG C~190 DEG C, SBS is added to step 2.1.3) be prepared
In 6th compound, high speed shear is carried out using emulsification pretreatment machine, stirred under conditions of shear rate is 5000r/min
15min, obtain seven compounds；
2.1.5) epoxy resin addition：Under the conditions of 180 DEG C~190 DEG C, epoxy resin is added to step 2.1.4) system
In standby the 7th obtained compound, high speed shear is carried out using emulsification pretreatment machine, under conditions of shear rate is 5000r/min
20min is stirred, obtains the 8th compound；
2.1.6) stabilizer addition：Under the conditions of 180 DEG C~190 DEG C, stabilizer is added to step 2.1.5) it is prepared into
To the 8th compound in, using emulsification pretreatment machine carry out high speed shear, shear rate be 5000r/min under conditions of stir
15min, obtain the 9th compound；
2.1.7) compatilizer addition：Under the conditions of 180 DEG C~190 DEG C, compatilizer is added to step 2.1.6) in the 9th
In compound, high speed shear is carried out using emulsification pretreatment machine, stirs 15min under conditions of shear rate is 5000r/min, so
Use electrodeless constant speed to stir instrument under conditions of stir speed (S.S.) is 1000r/min afterwards, stir 30min, obtain high resiliency pitch knot
Close material；
2.2) the high resiliency asphalt binder that step 2.1) is prepared is heated to 180 DEG C~190 DEG C, by fine aggregate plus
Polyester fiber is added in fine aggregate to 180 DEG C~190 DEG C and mixes and stirs 30s by heat, then adds lignin fibre and mixes and stirs 1min,
Then add high resiliency asphalt binder and mix and stir 1min, then add miberal powder and mix and stir 1min, obtain high resiliency asphalt adhesive pulp layer；Will
The high resiliency asphalt adhesive pulp layer being prepared is incubated under conditions of 180 DEG C~190 DEG C；
3) double-layer stress absorption band is prepared
3.1) stress that step 1.1) is prepared is poured at the seam of Deteriorated concrete pavement plate and/or the gap in crack
Asphalt binder is absorbed, after gap is filled and led up, stress absorption pitch is dispensed in the range of seam and the wide 0.3~0.4m of fracture faces
Mucilage layer, the thickness of the stress absorption asphalt adhesive pulp layer is 3mm；
3.2) under the laying of the upper surface of stress absorption asphalt adhesive pulp layer and stress absorption asphalt adhesive pulp layer respective width
Portion's Fibergrass polyester mat, rolled using small-sized rolling apparatus in the upper surface of bottom Fibergrass polyester mat, form first layer stress absorption
Band；When small-sized rolling apparatus rolls in the upper surface of bottom Fibergrass polyester mat, the temperature of stress absorption asphalt adhesive pulp layer is not less than
150℃；
3.3) continue to dispense and stress absorption asphalt adhesive pulp layer respective width in the upper surface of first layer stress absorption band
High resiliency asphalt adhesive pulp layer, the thickness of the high resiliency asphalt adhesive pulp layer is 3mm；
3.4) gather in the laying of the upper surface of high resiliency asphalt adhesive pulp layer and the top of high resiliency asphalt adhesive pulp layer respective width
Ester glass-fiber-fabric, rolled using small-sized rolling apparatus in the upper surface of top Fibergrass polyester mat, form second layer stress absorption band；It is small
When type rolling apparatus rolls in the upper surface of top Fibergrass polyester mat, the temperature of high resiliency asphalt adhesive pulp layer should be not less than 170 DEG C.
The present invention has advantages below compared with the prior art：
1) double-layer stress absorption band cost is low used by and prepares simplicity, and required raw material type is few.
2) double-layer stress absorption band function admirable used by, has that high temperature stability performance is good, Reflection Cracking fatigability
Can be good the advantages that, it can effectively alleviate that bad adhesion, stress absorption existing for existing stress absorption band be ineffective and durability
The problems such as poor.Also, preparation process is simple, device therefor cost is relatively low, can effectively reduce construction costs.
3) the stress absorption asphalt mastic that double-layer stress absorption band uses belongs to the modified asphalt material of soft stick nature, it with
Deteriorated concrete pavement plate seam and crack directly contact, and can effectively alleviate stress concentration phenomenon.Double-layer stress absorption band uses
High resiliency asphalt mastic belong to that elasticity is larger, modified asphalt material that tensile strength is big, it is common with two layers polyester glass-fiber-fabric
Effect, can effectively ensure that the overall tensile strength of stress absorption band, and the existing reflection crack of prevention continues to develop.
4) preparation method step is simple used by, reasonable in design and operation is simple, and prepared double-layer stress absorption band is excellent
It is good, including prepare stress absorption asphalt binder, prepare stress absorption asphalt mastic, prepare high resiliency asphalt binder, prepare
Four steps of high resiliency asphalt mastic, the process parameters design of each step is rationally and realization is convenient, and control is simple, can be effectively ensured
The performance of prepared Biological asphalt, and it is safe preparation process, reliable.
Brief description of the drawings
Fig. 1 is the structural representation of double-layer stress absorption band provided by the present invention；
Wherein：
1- stress absorption asphalt adhesive pulp layer；2- bottoms Fibergrass polyester mat；3- high resiliency asphalt adhesive pulp layer；4- tops polyester glass
Fine cloth；5- Deteriorated concrete pavement plates.
Embodiment
Below by drawings and examples, the technical solution adopted in the present invention is described in further detail, still
Invention is not limited only to embodiment disclosed below.
Referring to Fig. 1, the invention provides a kind of double-layer stress absorption band, include successively from the bottom to top：Stress absorption pitch
Mucilage layer 1, bottom Fibergrass polyester mat 2, high resiliency asphalt adhesive pulp layer 3 and top Fibergrass polyester mat 4.
At seam and crack of the stress absorption asphalt adhesive pulp layer 1 coated in Deteriorated concrete pavement plate 5, on the one hand it is used to play
The effect of joint seal, on the one hand it is used to absorb stress (phenomenon for often having stress concentration above old concrete plate seam and crack),
Compression rebound modulu is 200MPa~400MPa, and thickness 3mm, width is 0.3~0.4m.
Stress absorption asphalt adhesive pulp layer 1 is combined by stress absorption asphalt binder, miberal powder and fine aggregate, stress absorption
The proportioning of asphalt adhesive pulp layer 1 is stress absorption asphalt binder：Miberal powder：Fine aggregate=9：15：76, fine aggregate is substantially suspended at
It is all very good with the caking property of levels between the rubber cement that stress absorption pitch and miberal powder are formed.
The proportioning of stress absorption asphalt binder is 110# matrix pitches：PE：SBS：Montmorillonite：Stabilizer：Compatilizer=
100：3.2：1.1：10.3：0.2：0.3.Wherein, PE abbreviations polyethylene, it is a kind of aggregated obtained thermoplastic resin of ethene；
SBS is a kind of asphalt modifier finished product, i.e. styrene-butadiene block copolymer；Stabilizer is sulphur, and compatilizer is aromatic hydrocarbons
Oil.
The particle size range of fine aggregate is 0~5mm.
High resiliency asphalt adhesive pulp layer 3 be coated in bottom Fibergrass polyester mat 2 top, compression rebound modulu be 300~
500MPa, thickness 3mm, width are 0.3~0.4m.
High resiliency asphalt adhesive pulp layer 3 is combined by high resiliency asphalt binder, miberal powder and fine aggregate, high resiliency asphalt adhesive
The proportioning of pulp layer 3 is high resiliency asphalt binder：Polyester fiber：Lignin fibre：Miberal powder：Fine aggregate=13：0.25：0.1：
15：71.65.Wherein, to be that limestone is levigate obtain miberal powder；Fine aggregate is 0~5mm limestone aggregates.
The proportioning of high resiliency asphalt binder is 110# matrix pitches：Rubber powder：SBS：Kir：Epoxy resin：It is stable
Agent：Compatilizer=100：25：3：0.5：0.5：0.3：0.3.Rubber powder is the rubber powder of 200 mesh.
The particle size range of fine aggregate is 0~5mm.
In addition, the invention also discloses a kind of method and step is simple, reasonable in design and simple, the prepared double-layer stress of operation
The stress absorption band preparation method of absorption band function admirable, this method comprise the following steps：
Stress absorption asphalt adhesive pulp layer 1 is combined by stress absorption asphalt binder, miberal powder and fine aggregate, stress absorption
The proportioning of asphalt adhesive pulp layer 1 is stress absorption asphalt binder：Miberal powder：Fine aggregate=9：15：76, fine aggregate is substantially suspended at
It is all very good with the caking property of levels between the rubber cement that stress absorption pitch and miberal powder are formed.
The proportioning of stress absorption asphalt binder is 110# matrix pitches：PE：SBS：Montmorillonite：Stabilizer：Compatilizer=
100：3.2：1.1：5.3：0.2：0.3.Wherein, stabilizer is sulphur, and compatilizer is aromatic naphtha.
Step 1: prepare stress absorption asphalt binder.
1.1) matrix pitch heats：Matrix pitch is heated to temperature T1, wherein T1=150 DEG C~160 DEG C.
1.2) montmorillonite adds：
Montmorillonite dries 3h in 100 DEG C, -0.1MPa vacuum environment, is cooled down after drying in drier standby.
Under the conditions of temperature T1, in the matrix pitch after being heated 1.1) montmorillonite is added in, stirred using electrodeless constant speed
Instrument adds montmorillonite, ensures to add montmorillonite within 10min while stirring under conditions of stir speed (S.S.) is 500r/min；
Then high speed shear is carried out with high-speed shearing emulsion machine again, temperature control is in T1, shear rate 5000r/min, shearing 10min
Obtain the first compound.
1.3) SBS is added：Under the conditions of temperature T2, wherein T2=165 DEG C~175 DEG C, first 1.2) SBS is added in
In compound, high speed shear is carried out using emulsification pretreatment machine, 15min is stirred under conditions of shear rate is 5000r/min, obtains
To the second compound；
1.4) PE is added：Under the conditions of temperature T2,1.3) PE is added in the second compound, using emulsification pretreatment machine
High speed shear is carried out, 20min is stirred under conditions of shear rate is 5000r/min, obtains the 3rd compound.
1.5) stabilizer adds：Under the conditions of temperature T2,1.4) stabilizer is added in the 3rd compound, using cutting
Cut mulser and carry out high speed shear, stir 15min under conditions of shear rate is 5000r/min, obtain the 4th compound.
1.6) compatilizer adds：Under the conditions of temperature T2,1.5) compatilizer is added in the 4th compound, using cutting
Cut mulser and carry out high speed shear, 15min is stirred under conditions of shear rate is 5000r/min, then using electrodeless constant speed
Instrument is stirred under conditions of stir speed (S.S.) is 1000r/min, 30min is stirred, obtains stress absorption asphalt binder.
Step 2: prepare stress absorption asphalt adhesive pulp layer 1
Stress absorption asphalt binder is heated to temperature T2, fine aggregate is heated to temperature T4, wherein T4=180 DEG C~
190 DEG C, stress absorption asphalt binder is added in fine aggregate and mixes and stirs 1min, then added miberal powder and mix and stir 1min, obtain stress
Absorb asphalt adhesive pulp layer 1.
Step 3: prepare high resiliency asphalt binder.
3.1) matrix pitch heats：Matrix pitch is heated to temperature T3, wherein T3=175 DEG C~185 DEG C.
3.2) rubber powder adds：Under the conditions of temperature T3, in the matrix pitch after being heated 3.1) rubber powder is added in, adopt
High speed shear is carried out with emulsification pretreatment machine, 60min is stirred under conditions of shear rate is 3000r/min, obtains the 5th mixing
Material；
3.3) kir adds：5th mixture temperature is maintained at T4, by predetermined ratio in 3.2) the 5th compound
Middle addition kir, using the stirring instrument stirring of electrodeless constant speed, stir speed (S.S.) 2000r/min, stirring under the conditions of temperature T4
20min obtains the 6th compound；
3.4) SBS is added：Under the conditions of temperature T4,3.3) SBS is added in the 6th compound, using emulsification pretreatment
Machine carries out high speed shear, stirs 15min under conditions of shear rate is 5000r/min, obtains seven compounds；
3.5) epoxy resin adds：Under the conditions of temperature T4,3.4) epoxy resin is added in the 7th compound, adopt
High speed shear is carried out with emulsification pretreatment machine, 20min is stirred under conditions of shear rate is 5000r/min, obtains the 8th mixing
Material.
3.6) stabilizer adds：Under the conditions of temperature T4,3.5) stabilizer is added in the 8th compound, using cutting
Cut mulser and carry out high speed shear, stir 15min under conditions of shear rate is 5000r/min, obtain the 9th compound.
3.7) compatilizer adds：Under the conditions of temperature T4,3.6) compatilizer is added in the 9th compound, using cutting
Cut mulser and carry out high speed shear, 15min is stirred under conditions of shear rate is 5000r/min, then using electrodeless constant speed
Instrument is stirred under conditions of stir speed (S.S.) is 1000r/min, 30min is stirred, obtains high resiliency asphalt binder.
Step 4: prepare high resiliency asphalt adhesive pulp layer 3
High resiliency asphalt binder is heated to temperature T4, fine aggregate is heated to temperature T4, polyester fiber is added to
30s is mixed and stirred in fine aggregate, lignin fibre is then added and mixes and stirs 1min, high resiliency asphalt binder is then added and mixes and stirs 1min,
Then add miberal powder and mix and stir 1min, obtain high resiliency asphalt adhesive pulp layer 3.
Step 5: prepare double-layer stress absorption band
5.1) preparation
The stress absorption asphalt adhesive pulp layer 1 prepared is incubated under the conditions of temperature T2, the high resiliency pitch that will be prepared
Mucilage layer 3 is incubated under the conditions of temperature T4.
5.2) double-layer stress absorption band making
Stress absorption asphalt binder is poured at the seam of Deteriorated concrete pavement plate and the gap in crack, gap is filled and led up
Afterwards, stress absorption asphalt adhesive pulp layer 1 is dispensed in the range of seam and the wide 0.3~0.4m of fracture faces, it is 3mm to control thickness.
Followed by, the bottom Fibergrass polyester mat 2 of respective width is laid on the surface of stress absorption asphalt adhesive pulp layer 1, small-sized roll sets
It is standby and then to be rolled on the surface of bottom Fibergrass polyester mat 2, form first layer stress absorption band.
When small-sized rolling apparatus rolls on the surface of bottom Fibergrass polyester mat 2, the temperature of stress absorption asphalt adhesive pulp layer 1 should not
Less than 150 DEG C.
Continue the high resiliency asphalt adhesive pulp layer 3 of spreading respective width on the surface of first layer stress absorption band, control thickness
For 3mm.Followed by, the top Fibergrass polyester mat 4 of respective width, small-sized stone roller are laid on the surface of high resiliency asphalt adhesive pulp layer 3
And then pressure equipment rolls on the surface of top Fibergrass polyester mat 4, form second layer stress absorption band.
When small-sized rolling apparatus rolls on the surface of top Fibergrass polyester mat 4, the temperature of high resiliency asphalt adhesive pulp layer 3 should not be low
In 170 DEG C.
In order to further verify the present invention, large scale reflection crack fatigue test is carried out, compared for conventional monolayers should
The Reflection Cracking fatigue behaviour of power absorption band, double-layer stress absorption band of the present invention and stress absorbing layer, including load fatigability
Energy and temperature fatigue performance.The pitch Rotating fields of use are shown in Table 1 with material type.Result of the test is as shown in table 2 and table 3.
The asphalt overlaying Rotating fields of table 1 and material type
The asphalt overlay large scale temperature fatigue finder charge of table 2 acts on number
| Structure type | Just split number/time | Split eventually number/time | Fracture width/mm |
| Structure 1 | 224 | 895 | 1.2 |
| Structure 2 | 305 | 1217 | 0.9 |
| Structure 3 | 278 | 956 | 1.0 |
The asphalt overlay large scale load Fatigue Test Loads of table 3 act on number
| Structure type | Just split number/ten thousand time | Number/ten thousand time are split eventually | Fracture width/mm |
| Structure 1 | 12.68 | 16.92 | 1.1 |
| Structure 2 | 14.25 | 18.11 | 0.8 |
| Structure 3 | 11.70 | 14.63 | 1.5 |
From table 2 and table 3, the overlay structure of Old cement concrete is locally punished using double-layer stress absorption band
Temperature fatigue performance and load fatigue behaviour are all optimal, have been even more than the overlay structure of full paving stress absorbing layer.
Claims (5)
- A kind of 1. double-layer stress absorption band, it is characterised in that：The double-layer stress absorption band is equipped with stress successively from bottom to top Absorb asphalt adhesive pulp layer, bottom Fibergrass polyester mat, high resiliency asphalt adhesive pulp layer and top Fibergrass polyester mat；The high resiliency asphalt adhesive pulp layer is by high resiliency asphalt binder, polyester fiber, lignin fibre, miberal powder and fine aggregate It is prepared, the high resiliency asphalt binder, polyester fiber, lignin fibre, the weight ratio of miberal powder and fine aggregate are 13： 0.25：0.1：15：71.65；The compression rebound modulu of the high resiliency asphalt adhesive pulp layer is 300 ~ 500MPa, thickness 3mm, wide Degree is 0.3 ~ 0.4m；The particle diameter of fine aggregate employed in the high resiliency asphalt adhesive pulp layer is no more than 5mm.
- 2. double-layer stress absorption band according to claim 1, it is characterised in that：The stress absorption asphalt adhesive pulp layer is by answering Power absorbs asphalt binder, miberal powder and fine aggregate and is prepared；Stress absorption asphalt binder, miberal powder and the fine aggregate Weight ratio be 9：15：76；The compression rebound modulu of the stress absorption asphalt adhesive pulp layer is 200MPa ~ 400MPa, and thickness is 3mm, width are 0.3 ~ 0.4m；The particle diameter of fine aggregate employed in the stress absorption asphalt adhesive pulp layer is no more than 5mm.
- 3. double-layer stress absorption band according to claim 2, it is characterised in that：The stress absorption asphalt binder be by 110# matrix pitches, PE, SBS, montmorillonite, stabilizer and compatilizer are prepared；The 110# matrix pitches, PE, SBS, The weight ratio of montmorillonite, stabilizer and compatilizer is 100：3.2：1.1：10.3：0.2：0.3.
- 4. according to the double-layer stress absorption band described in claim 1 or 2 or 3, it is characterised in that：The high resiliency asphalt binder High resiliency asphalt binder is by 110# matrix pitches, rubber powder, SBS, kir, epoxy resin, stabilizer and compatilizer system It is standby to form；The 110# matrix pitches, rubber powder, SBS, kir, epoxy resin, the weight ratio of stabilizer and compatilizer are 100：25：3：0.5：0.5：0.3：0.3；The rubber powder is the rubber powder of 200 mesh.
- A kind of 5. method for being used to prepare the double-layer stress absorption band described in claim 4, it is characterised in that：Methods described includes Following steps：1）Prepare stress absorption asphalt adhesive pulp layer：1.1）Prepare stress absorption asphalt binder：1.1.1）110# matrix pitches are heated to 150 DEG C ~ 160 DEG C；1.1.2）Montmorillonite adds：3h is dried in montmorillonite in 100 DEG C, vacuum environment, is cooled down after drying in drier standby； Under conditions of 150 DEG C ~ 160 DEG C, montmorillonite is added into step 1.1.1）In 110# matrix pitches after middle heating, in stir speed (S.S.) Under conditions of 500r/min, montmorillonite is added while stirring, ensures to add montmorillonite within 10min；Then again with a high speed Emulsification pretreatment machine carries out high speed shear, and at 150 DEG C ~ 160 DEG C, shear rate 5000r/min, shearing 10min is obtained temperature control To the first compound；1.1.3）SBS is added：Under conditions of 165 DEG C ~ 175 DEG C, SBS is added to 1.1.2）The first compound being prepared In, high speed shear is carried out using emulsification pretreatment machine, 15min is stirred under conditions of shear rate is 5000r/min, obtains second Compound；1.1.4）PE is added：Under the conditions of 165 DEG C ~ 175 DEG C, PE is added to 1.1.3）In the second compound being prepared, High speed shear is carried out using emulsification pretreatment machine, 20min is stirred under conditions of shear rate is 5000r/min, it is mixed to obtain the 3rd Close material；1.1.5）Stabilizer adds：Under the conditions of 165 DEG C ~ 175 DEG C, stabilizer is added to 1.1.4）The 3rd be prepared is mixed Close in material, high speed shear is carried out using emulsification pretreatment machine, stir 15min under conditions of shear rate is 5000r/min, obtain 4th compound；1.1.6）Compatilizer adds：Under the conditions of 165 DEG C ~ 175 DEG C, compatilizer is added to 1.1.5）The 4th be prepared is mixed Close in material, high speed shear is carried out using emulsification pretreatment machine, stir 15min under conditions of shear rate is 5000r/min, then Under conditions of stir speed (S.S.) is 1000r/min, 30min is stirred, obtains stress absorption asphalt binder；1.2）By step 1.1）The stress absorption asphalt binder being prepared is heated to 165 DEG C ~ 175 DEG C, and fine aggregate is heated To 180 DEG C ~ 190 DEG C, by step 1.1）The stress absorption asphalt binder being prepared adds in fine aggregate and mixes and stirs 1min, then Add miberal powder and mix and stir 1min, stress absorption asphalt adhesive pulp layer is obtained, by the stress absorption asphalt adhesive pulp layer being prepared at 165 DEG C It is incubated under conditions of ~ 175 DEG C；2）Prepare high resiliency asphalt adhesive pulp layer：2.1）Prepare high resiliency asphalt binder；2.1.1）110# matrix pitches are heated to 175 DEG C ~ 185 DEG C；2.1.2）Rubber powder adds：Under the conditions of 175 DEG C ~ 185 DEG C, rubber powder is added into step 2.1.1）110# after middle heating In matrix pitch, high speed shear is carried out using emulsification pretreatment machine, 60min is stirred under conditions of shear rate is 3000r/min, Obtain the 5th compound；2.1.3）Kir adds：The temperature of 5th compound is maintained at 180 DEG C ~ 190 DEG C, in step 2.1.2）It is prepared The 5th compound in add kir, under conditions of 180 DEG C ~ 190 DEG C using electrodeless constant speed stirring instrument stirring, stir speed (S.S.) The 6th compound is obtained for 2000r/min, stirring 20min；2.1.4）SBS is added：Under conditions of 180 DEG C ~ 190 DEG C, SBS is added to step 2.1.3）The 6th be prepared is mixed Close in material, high speed shear is carried out using emulsification pretreatment machine, stir 15min under conditions of shear rate is 5000r/min, obtain Seven compounds；2.1.5）Epoxy resin adds：Under the conditions of 180 DEG C ~ 190 DEG C, epoxy resin is added to step 2.1.4）It is prepared The 7th compound in, using emulsification pretreatment machine carry out high speed shear, shear rate be 5000r/min under conditions of stir 20min, obtain the 8th compound；2.1.6）Stabilizer adds：Under the conditions of 180 DEG C ~ 190 DEG C, stabilizer is added to step 2.1.5）Be prepared In eight compounds, high speed shear is carried out using emulsification pretreatment machine, 15min is stirred under conditions of shear rate is 5000r/min, Obtain the 9th compound；2.1.7）Compatilizer adds：Under the conditions of 180 DEG C ~ 190 DEG C, compatilizer is added to step 2.1.6）In the 9th compound In, high speed shear is carried out using emulsification pretreatment machine, 15min is stirred under conditions of shear rate is 5000r/min, then uses Electrodeless constant speed stirring instrument stirs 30min, obtains high resiliency asphalt binder under conditions of stir speed (S.S.) is 1000r/min；2.2）By step 2.1）The high resiliency asphalt binder being prepared is heated to 180 DEG C ~ 190 DEG C, and fine aggregate is heated to 180 DEG C ~ 190 DEG C, polyester fiber is added in fine aggregate and mixes and stirs 30s, then added lignin fibre and mix and stir 1min, Ran Houjia Enter high resiliency asphalt binder and mix and stir 1min, then add miberal powder and mix and stir 1min, obtain high resiliency asphalt adhesive pulp layer；It will be prepared into To high resiliency asphalt adhesive pulp layer be incubated under conditions of 180 DEG C ~ 190 DEG C；3）Prepare double-layer stress absorption band3.1）Step 1.1 is poured at the seam of Deteriorated concrete pavement plate and/or the gap in crack）The stress absorption being prepared Asphalt binder, after gap is filled and led up, stress absorption asphalt mastic is dispensed in the range of seam and the wide 0.3 ~ 0.4m of fracture faces Layer, the thickness of the stress absorption asphalt adhesive pulp layer is 3mm；3.2）In the upper surface of stress absorption asphalt adhesive pulp layer, laying and the bottom of stress absorption asphalt adhesive pulp layer respective width are gathered Ester glass-fiber-fabric, rolled using small-sized rolling apparatus in the upper surface of bottom Fibergrass polyester mat, form first layer stress absorption band；It is small When type rolling apparatus rolls in the upper surface of bottom Fibergrass polyester mat, the temperature of stress absorption asphalt adhesive pulp layer is not less than 150 DEG C；3.3）Continue to dispense in the upper surface of first layer stress absorption band high-elastic with stress absorption asphalt adhesive pulp layer respective width Property asphalt adhesive pulp layer, the thickness of the high resiliency asphalt adhesive pulp layer is 3mm；3.4）Laying and the top polyester glass of high resiliency asphalt adhesive pulp layer respective width in the upper surface of high resiliency asphalt adhesive pulp layer Fine cloth, rolled using small-sized rolling apparatus in the upper surface of top Fibergrass polyester mat, form second layer stress absorption band；Small-sized stone roller When pressure equipment rolls in the upper surface of top Fibergrass polyester mat, the temperature of high resiliency asphalt adhesive pulp layer should be not less than 170 DEG C.
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| CN204898456U (en) * | 2015-09-02 | 2015-12-23 | 南京同安道路工程有限公司 | Contain rubber asphalt stress absorption layer bituminous paving |
| CN205839518U (en) * | 2016-05-26 | 2016-12-28 | 山西省交通科学研究院 | A kind of double-layer stress absorption band |
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| CN204898456U (en) * | 2015-09-02 | 2015-12-23 | 南京同安道路工程有限公司 | Contain rubber asphalt stress absorption layer bituminous paving |
| CN205839518U (en) * | 2016-05-26 | 2016-12-28 | 山西省交通科学研究院 | A kind of double-layer stress absorption band |
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