CN109231890A - A kind of stone mastic asphalt and preparation method thereof - Google Patents
A kind of stone mastic asphalt and preparation method thereof Download PDFInfo
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- CN109231890A CN109231890A CN201811046995.XA CN201811046995A CN109231890A CN 109231890 A CN109231890 A CN 109231890A CN 201811046995 A CN201811046995 A CN 201811046995A CN 109231890 A CN109231890 A CN 109231890A
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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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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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Abstract
The invention discloses a kind of stone mastic asphalts and preparation method thereof, belong to road engineering material field, stone mastic asphalt, based on parts by weight, including gather materials 100 parts, 5-7 parts of SBS modified pitch, 8-12 parts of miberal powder, 0.2-0.6 parts of fiber stabilizer, 2-7 parts of carbon black, 5-8 parts of phenolic resin, 2-3 parts of curing agent.The stone mastic asphalt, can not only improve the intensity and durability on road surface, and road surface can be made to have good crack resistance, and abrasion performance reduces the risk that track disease occurs for bituminous pavement.
Description
Technical field
The present invention relates to road engineering material fields, more specifically, it is related to a kind of stone mastic asphalt
And preparation method thereof.
Background technique
Communications and transportation is the lifeblood of the national economic development.With China's rapid development of economy, flow increases, and axis, which carries, to be aggravated
And canalized traffic etc. has become the distinguishing feature of Modern Traffic.Since bituminous pavement has good road-ability and excellent
Service performance, construction speed block, it is easy to maintenance the features such as, occupy significant proportion always in road pavement, this is to asphalt road
More stringent requirements are proposed for face construction, and such as high speed safe, comfortable, resistance to is waited so long.
Stone mastic asphalt (SMA) is a kind of steady with asphalt binder, miberal powder, a small amount of fine aggregate and fiber
The bitumastic binder for determining agent composition, is filled in the mineral aggregate skeleton that level of indirection is matched, the mixture of formation.Asphalt binder
It improves to pave the way and resists the ability of driving and the damage of natural cause road pavement with pellet, be that dirt, waterproof, prolonged is lacked in evenness of road surface
It is durable.Therefore, bituminous pavement is a kind of high class pavement being widely used in road construction.
But at present the generally existing technology of bituminous pavement and quality problems be mainly highway engineering service life reduce and
Early damage to pavement.On the one hand, the actual life of existing road is generally shorter than design service life；On the other hand, with
The volume of traffic increases rapidly, and vehicle enlargement and serious overload and weather conditions are changeable, and summer temperature is high, winter temperature is low,
Road surface rutting resistance is poor, pavement strength is not high, and road surface is caused to be easy to appear various forms of cracks, influences the performance on road surface,
Need to carry out multiple maintenance work, it is not only time-consuming and laborious also to will affect traffic condition and safety.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of stone mastic asphalt,
The intensity and durability on road surface can not only be improved, and can make road surface that there is good crack resistance, abrasion performance reduces pitch
The risk of road surface generation track disease.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of stone mastic asphalt, based on parts by weight, including gather materials 100 parts, 5-7 parts of SBS modified pitch, miberal powder
8-12 parts, 0.2-0.6 parts of fiber stabilizer, 2-7 parts of carbon black, 5-8 parts of phenolic resin, 2-3 parts of curing agent.
A kind of stone mastic asphalt provided by the invention, using SBS modified pitch, polystyrene chain in SBS
Two phase structure is significantly presented in section and polybutadiene segments, and polybutadiene is continuous phase, and polystyrene is dispersed phase, this two-phase
Separated structure can form space multistory network structure with bitumen base, and SBS can improve the high and low warm nature of pitch simultaneously
Energy and temperature-sensitive performance, so that stone mastic asphalt has high-temperature stability and low-temperature cracking-resistance, to improve pitch
The durability of mastic-broken stone mixture.The compatibility of carbon black and pitch is preferable, and carbon black is added in the present invention, can obviously improve
The high-temperature stability of SBS modified pitch, while cryogenic property is not influenced, in stone mastic asphalt, carbon black can be complete
It is scattered in SBS modified pitch film entirely, plays the role of enhancing, after enhancing stone mastic asphalt making, road surface
Anti-rut behavior improves the ageing-resistant performance of SBS modified pitch, in addition, carbon black has the ability for absorbing ultraviolet light so as to mention
The ageing-resistant performance on high road surface.Phenolic resin is added, the anti-flammability of mixture can be improved, improves safety, and phenolic resin has
Have that intensity is high, the features such as resistant to chemical etching, wear-resisting, durability, in conjunction with curing agent, changes asphalt at room temperature
Cross-linking reaction is learned, space net structure is formed and is made it have anti-to improve the bond strength of stone mastic asphalt
Fragility energy.
Further, the SBS modified pitch includes 100 parts of matrix pitch, 5-10 parts of SBS resin, polybutene-to benzene two
Hydrochlorate -3-8 parts of polyethers ethylene glycol block polymer, 3-5 parts of nano silica, 1-5 parts of rubber softening oil, sulphur powder 0.3-
0.5 part, 0.18-0.35 parts of stabilizer.
Two phase structure is significantly presented in polystyrene chain segment and polybutadiene segments in SBS, and polybutadiene is continuous phase, gathers
Styrene is dispersed phase, and this two-phase laminated flow structure can form space multistory network structure with bitumen base, and SBS can
The high and low temperature performance and temperature-sensitive performance for improving pitch simultaneously, improve the high and low temperature performance of matrix pitch.
SBS is generally uniformly dispersed with micron-sized fine particle and is suspended in pitch, due to the polarity of SBS, molecular weight
And solubility parameter, the compatibility and storage stability of SBS and pitch are influenced, nano silica is added in the present invention,
The large specific surface area of nanoparticle, surface free energy is big, good dispersion, reduces the free energy on the molecule surface of SBS, inhibits
The aggregation of SBS molecule improves the binding ability of SBS and asphalt interface.Add sulphur powder, using sulphur atom outside empty rail
Road, close to SBS butadiene residual carbon-carbon double bond, reduce low cloud density so that carbon-carbon double bond it is unstable and and sulphur atom
Chemical covalent bonds are formed, finally SBS are made to form inierpeneirating network structure in pitch by mutual reaction, to improve SBS
The stability of modified pitch.Meanwhile add polybutene-terephthalate-polyethers ethylene glycol block polymer as plasticiser, can
The mobility for improving SBS modified pitch makes it easy to penetrate between aggregate particle, the combination for promoting SBS modified pitch and gathering materials,
To which the density of stone mastic asphalt can be improved, so as to be that road surface has stronger intensity and crack resistance
Can, improve the durability of road surface actual use.
Further, the SBS pitch the preparation method comprises the following steps: matrix pitch is heated to 165-175 DEG C, SBS tree is added
Rouge, high speed shear are dispersed 2-3 hours, and polybutene-terephthalate-polyethers ethylene glycol block polymer, nanometer titanium dioxide is added
Silicon, sulphur powder then heat to 175 DEG C of -180 DEG C of grindings, then add rubber softening oil, controls temperature at 180 DEG C -185
It DEG C stirring 2-3 hour, reduces temperature to addition stabilizer after 170 DEG C -175 DEG C and is stirred for 1-2 hours to get SBS modified pitch.
Further, the fiber stabilizer includes the modified wood fibre and glass fibre that weight ratio is 1-3:1.
The present invention selects wood fibre to mix with glass fibre, and wood fibre has the function of powerful crosslinking, it and other
Material mixing after, overlapped at once between fiber as blanket, this three-D space structure can exist water or other liquid locks
Therebetween, fiber is longer, and thickening power is bigger, and the good stability of the dimension of wood fibre so that mixture will not shrink it is heavy
Drop, improves its crack resistance.Glass fibre has the pavement performances such as high intensity, high temperature resistant, the high elasticity of flexure and high orientation energy,
Play the role of reinforcing rib in stone mastic asphalt, improves the intensity of stone mastic asphalt, with
Wood fibre synergistic effect reduces asphalt road so that stone mastic asphalt obtained has excellent cracking resistance
The risk of face generation track disease.
Further, the modified wood fibre is prepared by the following method: 4-5 parts of maleic anhydrides are dissolved in 6-7 parts of N,
In dinethylformamide solution, 0.4-0.5 parts of hydroquinones are then added, stir 20-30 minutes, 2-3 parts of wooden fibres are added
Dimension, control temperature 75-85 DEG C reaction 1-2 hour, filter, it is impregnated 30-60 minutes in acetone, stirring 3-4 hours, mistake
Filter, is placed into baking oven, is kept for 80-90 DEG C of temperature obtain modified wood fibre within dry 10-12 hours.
Wood fibre itself and the binding performance of pitch are poor, by modified wood fibre, are grafted to wood fibre
It is modified, improve the binding performance of wood fibre and pitch.And wood fibre after modified is easily dispersed, reinforcing effect is good, matter
Ground is soft, advantageously reduces the shake generated when brake.
Further, described to gather materials including 85-90 parts of coarse aggregate, 10-15 parts of fine aggregate, the coarse aggregate is selected from the Black Warrior
Rock, the fine aggregate are selected from limestone machine-made sand.
The present invention, which gathers materials, selects the mixing of coarse aggregate and fine aggregate, and content of coarse aggregate is more, fine aggregate content is less.
The strong structural framework of the mutual interlocking composition high stability of the more coarse aggregate of content, non-deformability, fine aggregate and miberal powder, SBS
The bitumastic of modified pitch and fiber stabilizer composition is cemented together by skeleton, and fills skeleton gap, makes mixture
With preferable flexible and durability.
Further, the coarse aggregate include weight ratio be 15-16:2-3 particle size range be 5-16mm basalt and
Particle size range is the basalt of 3-5mm, and the fine aggregate is the limestone machine-made sand that particle size range is 0-3mm.
Further, the miberal powder is basalt, and apparent relative density 2.76g/cm3, water content is less than 1%, grain
Degree is -400 mesh of 300 mesh.
It is an object of the invention to also provide a kind of preparation method of stone mastic asphalt, pitch Ma obtained
Hoof fat crushed stones mixture can not only improve the durability on road surface, and road surface can be made to have good crack resistance, abrasion performance, drop
The risk of track disease occurs for low bituminous pavement.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method of stone mastic asphalt, includes the following steps:
(1) it heats SBS modified pitch and keeps the temperature；
(2) will gather materials heating, stir evenly, and phenolic resin, carbon black is then added, stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder, fiber stabilizer and curing agent is added, stirs evenly to obtain stone mastic asphalt.
Further, SBS modified pitch is heated to 165-175 DEG C in step (1), gathers materials in step (2) and is heated to 180-
190℃。
In conclusion the invention has the following advantages:
The first, a kind of stone mastic asphalt provided by the invention, using SBS modified pitch, polystyrene chain in SBS
Two phase structure is significantly presented in section and polybutadiene segments, and polybutadiene is continuous phase, and polystyrene is dispersed phase, this two-phase
Separated structure can form space multistory network structure with bitumen base, and SBS can improve the high and low warm nature of pitch simultaneously
Energy and temperature-sensitive performance, so that stone mastic asphalt has high-temperature stability and low-temperature cracking-resistance, to improve pitch
The durability and cracking resistance of mastic-broken stone mixture.The compatibility of carbon black and pitch is preferable, and carbon black is added in the present invention,
It can obviously improve the high-temperature stability of SBS modified pitch, while not influencing cryogenic property, in stone mastic asphalt
In, carbon black can be fully dispersed in SBS modified pitch film, play the role of enhancing, enhancing stone mastic asphalt paving
After building, the anti-rut behavior on road surface.
The second, the present invention, which gathers materials, selects the mixing of coarse aggregate and fine aggregate, and content of coarse aggregate is more, fine aggregate content
It is less.The strong structural framework of the mutual interlocking composition high stability of the more coarse aggregate of content, non-deformability, fine aggregate and mine
The bitumastic of powder, SBS modified pitch and fiber stabilizer composition is cemented together by skeleton, and fills skeleton gap, makes
Mixture has preferable flexible and durability.
Third, stone mastic asphalt manufacture craft provided by the invention are simple, from a wealth of sources, can be widely applied
In the making of cement concrete pavement, there is excellent pavement performance, mechanical property and good durability.
Specific embodiment
Invention is further described in detail with reference to embodiments.It should be understood that described in the embodiment of the present invention
Preparation method is only used for illustrating the present invention, rather than limiting the invention, to this hair under concept thereof of the invention
The simple modifications of bright preparation method belong to the scope of protection of present invention.
In following embodiment, used raw material is both from commercially available.Basalt crush values are 7.8%, and density is
2.752g/cm3, water absorption rate 0.58%；Curing agent is amine curing agent, and the present invention selects m-xylene diamine；Matrix pitch is full
No. 70 A grades of road asphalt technical requirements of foot；Wood fibre length is 4.5-6mm, glass fibre length 4-6mm, diameter 9-
13 μm, moisture content≤0.1%, combustible content≤0.2%；The molecular weight of SBS resin is 250,000；Stabilizer, effective component contain
Amount >=99.0%, apparent density 1.0-1.5g/cm3, moisture content≤0.5%.
The preparation example 1 of SBS modified pitch
The matrix pitch of 100kg is heated to 165 DEG C, SBS resin 5kg, high speed shear 2 hours is then added, polybutene-is added
Terephthalate-polyethers ethylene glycol block polymer 3kg, nano silica 3kg, sulphur powder 0.3kg, then heats to 175
DEG C resulting mixture is ground, then add rubber softening oil 1kg, control temperature stirs 2 hours at 180 DEG C, drop
The stabilizer of low temperature to addition 0.18kg after 170 DEG C are stirred for 1 hour to get SBS modified pitch.
The preparation example 2 of SBS modified pitch
The matrix pitch of 100kg is heated to 170 DEG C, SBS resin 8kg, high speed shear 2.5 hours is then added, poly- fourth is added
Alkene-terephthalate-polyethers ethylene glycol block polymer 5kg, nano silica 4kg, sulphur powder 0.4kg, then heats to
178 DEG C are ground resulting mixture, then add rubber consistent lubricant 3kgkg, and control temperature is small in 183 DEG C of stirrings 2.5
When, the stabilizer for reducing temperature to addition 0.26kg after 173 DEG C is stirred for 1.5 hours to get SBS modified pitch.
The preparation example 3 of SBS modified pitch
The matrix pitch of 100kg is heated to 175 DEG C, SBS resin 10kg, high speed shear 3 hours is then added, poly- fourth is added
Alkene-terephthalate-polyethers ethylene glycol block polymer 8kg, nano silica 5kg, sulphur powder 0.5kg, then heats to
180 DEG C are ground resulting mixture, then add rubber softening oil 5kg, and control temperature stirs 3 hours at 185 DEG C,
The stabilizer for reducing temperature to addition 0.35kg after 175 DEG C is stirred for 2 hours to get SBS modified pitch.
The preparation example 1 of modified wood fibre
The maleic anhydride of 4kg is dissolved in the n,N-Dimethylformamide solution of 6kg, then be added 0.4kg to benzene
Diphenol stirs 20 minutes, and the wood fibre of 2kg is added, and control temperature is reacted 1 hour at 75 DEG C, and vacuumizing filtration obtains product A,
Products therefrom A is impregnated 30 minutes in acetone, is stirred 3 hours, vacuumizing filtration obtains product B again, and products therefrom B is placed
Into baking oven, 80 DEG C of dryings are maintained the temperature at 12 hours to get modified wood fibre.
The preparation example 2 of modified wood fibre
The maleic anhydride of 4.5kg is dissolved in the n,N-Dimethylformamide solution of 6.5kg, is then added 0.45kg's
Hydroquinone stirs 25 minutes, and the wood fibre of 2.5kg is added, and control temperature is reacted 1.5 hours at 80 DEG C, vacuumizing filtration
Product A is obtained, products therefrom A is impregnated 40 minutes in acetone, is stirred 3.5 hours, vacuumizing filtration obtains product B again, by institute
It obtains product B to be placed into baking oven, maintains the temperature at 85 DEG C of dryings 11 hours to get modified wood fibre.
The preparation example 3 of modified wood fibre,
The maleic anhydride of 5kg is dissolved in the n,N-Dimethylformamide solution of 7kg, then be added 0.5kg to benzene
Diphenol stirs 30 minutes, and the wood fibre of 3kg is added, and control temperature is reacted 2 hours at 85 DEG C, and vacuumizing filtration obtains product A,
Products therefrom A is impregnated 60 minutes in acetone, is stirred 4 hours, vacuumizing filtration obtains product B again, and products therefrom B is placed
Into baking oven, 90 DEG C of dryings are maintained the temperature at 10 hours to get modified wood fibre.
Embodiment 1
(1) the SBS modified pitch 5kg for taking SBS modified pitch preparation example 1 to provide is heated to 165 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 75kg, particle size range be 3-5mm basalt 10kg and particle size range be
The limestone machine-made sand 15kg of 0-3mm is mixed, and is heated to 180 DEG C, is stirred evenly, then sequentially adds phenolic resin 5kg, carbon black
2kg stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 8kg is added, the modified wood fibre 0.1kg and glass fibre 0.1kg, curing agent that modified wood fibre preparation example 1 provides
2kg is stirred evenly, and obtains stone mastic asphalt.
Embodiment 2
(1) the SBS modified pitch 5.8kg for taking SBS modified pitch preparation example 2 to provide is heated to 165 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 75kg, particle size range be 3-5mm basalt 15kg and particle size range be
The limestone machine-made sand 10kg of 0-3mm is mixed, and is heated to 182 DEG C, is stirred evenly, then sequentially adds phenolic resin 6kg, carbon black
4kg stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 10kg, the modified wood fibre 0.27kg that modified wood fibre preparation example 2 provides and glass fibre 0.13kg, solidification is added
Agent 2.2kg is stirred evenly, and obtains stone mastic asphalt.
Embodiment 3
(1) the SBS modified pitch 6.0kg for taking SBS modified pitch preparation example 3 to provide is heated to 167 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 76kg, particle size range be 3-5mm basalt 12kg and particle size range be
The limestone machine-made sand 12kg of 0-3mm is mixed, and is heated to 184 DEG C, is stirred evenly, then sequentially adds phenolic resin 7kg, carbon black
6kg stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 12kg, the modified wood fibre 0.45kg that modified wood fibre preparation example 3 provides and glass fibre 0.15kg, solidification is added
Agent 2.3kg is stirred evenly, and obtains stone mastic asphalt.
Embodiment 4
(1) the SBS modified pitch 6.5kg for taking SBS modified pitch preparation example 2 to provide is heated to 170 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 78kg, particle size range be 3-5mm basalt 11kg and particle size range be
The limestone machine-made sand 11kg of 0-3mm is mixed, and is heated to 186 DEG C, is stirred evenly, then sequentially adds phenolic resin 8kg, carbon black
7kg stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 8kg, the modified wood fibre 0.15kg that modified wood fibre preparation example 1 provides and glass fibre 0.15kg, solidification is added
Agent 2.5kg is stirred evenly, and obtains stone mastic asphalt.
Embodiment 5
(1) the SBS modified pitch 7kg for taking SBS modified pitch preparation example 1 to provide is heated to 175 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 80kg, particle size range be 3-5mm basalt 10kg and particle size range be
The limestone machine-made sand 10kg of 0-3mm is mixed, and is heated to 190 DEG C, is stirred evenly, then sequentially adds phenolic resin 8kg, carbon black
5kg stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 9kg, the modified wood fibre 0.37kg that modified wood fibre preparation example 2 provides and glass fibre 0.13kg, solidification is added
Agent 3kg is stirred evenly, and obtains stone mastic asphalt.
Comparative example 1
(1) it takes SBS modified pitch 7kg to be heated to 175 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 80kg, particle size range be 3-5mm basalt 10kg and particle size range be
The limestone machine-made sand 10kg of 0-3mm is mixed, and is heated to 190 DEG C, is stirred evenly, obtains mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 9kg, wood fibre 0.37kg, curing agent 3kg is added to stir evenly, obtains stone mastic asphalt.
Comparative example 2
(1) it takes SBS modified pitch 6.0kg to be heated to 167 DEG C, and keeps the temperature；
(2) by particle size range be 5-16mm basalt 76kg, particle size range be 3-5mm basalt 12kg and particle size range be
The limestone machine-made sand 12kg of 0-3mm is mixed, and is heated to 184 DEG C, is stirred evenly, obtains mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder 12kg, wood fibre 0.45kg and glass fibre 0.15kg, curing agent 2.3kg is added to stir evenly, obtains bitumastic
Macadam-aggregate mix.
Traditional performance test is carried out to SBS modified pitch provided by the invention and matrix pitch, according to JTG E20-
2011 " highway engineering pitch and Asphalt Mixture Experiment regulations " regulation carries out basic performance tests.Specific test result is shown in Table 1.
The performance of table 1SBS modified pitch and matrix pitch
As shown in Table 1, the smaller softening point of needle penetration of SBS modified pitch produced by the present invention is higher.Needle penetration is smaller, shows
The consistency of SBS modified pitch is larger, and viscosity is larger, and softening point reaches 90 DEG C or more, shows that high-temperature behavior is excellent, high temperature does not leak
Analysis.
According to " highway asphalt road name construction technique normalizing " (JTGF40-2004), to embodiment 1-5 and comparative example 1-2
Provided stone mastic asphalt carries out properties test, and test result is as shown in table 2.
Note: high-temperature stability-wheel tracking test dynamic stability；Low-temperature cracking-resistance-low temperature bend test failure strain.
From table 2 it can be seen that the stability and low temperature of stone mastic asphalt high temperature with higher of the present invention
Crack resistance, meanwhile, compared to for more other stone mastic asphalts, high-temperature behavior is improved significantly, Ke Yiti
Rise the high-temperature stability of road；And stone mastic asphalt water of the present invention is steady it can be seen from stability test result
Water stability MS is greater than 80% and TSR in qualitative much satisfactions " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004)
The requirement of endurance quality greater than 75% can satisfy the variation of weather conditions, reduce the generation in crack, improve the anti-vehicle on road surface
Rut ability and durability.
It is greater than 55% according to BPN coefficient in " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004), antiskid performance
It is obviously improved.
In conclusion the non-deformability of stone mastic asphalt is strong, durability is good.One kind provided by the invention
Stone mastic asphalt, using SBS modified pitch, polystyrene chain segment and polybutadiene segments are significantly in SBS
Existing two phase structure, polybutadiene is continuous phase, and polystyrene is dispersed phase, and this two-phase laminated flow structure can be with bitumen base
Space multistory network structure is formed, and SBS can improve the high and low temperature performance and temperature-sensitive performance of pitch simultaneously, so that pitch Ma
Hoof fat crushed stones mixture has high-temperature stability and low-temperature cracking-resistance, to improve the durability of stone mastic asphalt
And cracking resistance.The present invention is matched using coarse aggregate and fine aggregate using suitable grade, the good embedded squeezing of coarse aggregate, mixture
There is extraordinary high temperature rutting resistance.Fiber stabilizer by modified wood fibre and glass fibre with compound, can be to mixing
Material plays the effects of reinforcement, dispersion, stabilization, thickening, with the addition of fiber, stone mastic asphalt bituminous concrete
Disperse and analyse leakage be obviously improved.
Claims (10)
1. a kind of stone mastic asphalt, which is characterized in that based on parts by weight, including gather materials 100 parts, SBS modification
5-7 parts of pitch, 8-12 parts of miberal powder, 0.2-0.6 parts of fiber stabilizer, 2-7 parts of carbon black, 5-8 parts of phenolic resin, 2-3 parts of curing agent.
2. a kind of stone mastic asphalt according to claim 1, which is characterized in that the SBS modified pitch
Including 100 parts of matrix pitch, 5-10 parts of SBS resin, polybutene-terephthalate -3-8 parts of polyethers ethylene glycol block polymer,
3-5 parts of nano silica, 1-5 parts of rubber softening oil, 0.3-0.5 parts of sulphur powder, 0.18-0.35 parts of stabilizer.
3. a kind of stone mastic asphalt according to claim 2, which is characterized in that the system of the SBS pitch
Preparation Method are as follows: matrix pitch is heated to 165-175 DEG C, SBS resin is added, high speed shear is dispersed 2-3 hours, and poly- fourth is added
Alkene-terephthalate-polyethers ethylene glycol block polymer, nano silica, sulphur powder, then heats to 175 DEG C -180 DEG C
Grinding, then adds rubber softening oil, control temperature 180 DEG C -185 DEG C of stirrings 2-3 hours, reduction temperature to 170 DEG C -
Stabilizer is added after 175 DEG C and is stirred for 1-2 hours to get SBS modified pitch.
4. a kind of stone mastic asphalt according to claim 1, which is characterized in that the fiber stabilizer packet
Include the modified wood fibre and glass fibre that weight ratio is 1-3:1.
5. a kind of stone mastic asphalt according to claim 4, which is characterized in that the modified wood fibre
It is prepared by the following method: 4-5 parts of maleic anhydrides being dissolved in 6-7 parts of n,N-Dimethylformamide solution, 0.4- is then added
0.5 part of hydroquinone, stir 20-30 minute, be added 2-3 parts of wood fibres, control temperature 75-85 DEG C reaction 1-2 hours, mistake
Filter, it is impregnated 30-60 minutes in acetone, is stirred 3-4 hours, and filtering is placed into baking oven, is kept for 80-90 DEG C of temperature do
Dry 10-12 hours obtains modified wood fibre.
6. a kind of stone mastic asphalt according to claim 1, which is characterized in that described to gather materials including rough set
Expect that 85-90 parts, 10-15 parts of fine aggregate, the coarse aggregate are selected from basalt, the fine aggregate is selected from limestone machine-made sand.
7. a kind of stone mastic asphalt according to claim 6, which is characterized in that the coarse aggregate includes weight
The basalt that the basalt and particle size range that the particle size range that amount ratio is 15-16:2-3 is 5-16mm are 3-5mm, the fine aggregate
The limestone machine-made sand for being 0-3mm for particle size range.
8. a kind of stone mastic asphalt according to claim 1, which is characterized in that the miberal powder is the Black Warrior
Rock, apparent relative density 2.76g/cm3, for water content less than 1%, granularity is -400 mesh of 300 mesh.
9. a kind of preparation method of stone mastic asphalt as described in claim 1 to 8 any one, feature exist
In including the following steps:
(1) it heats SBS modified pitch and keeps the temperature；
(2) will gather materials heating, stir evenly, and phenolic resin, carbon black is then added, stirs evenly to obtain mixture A；
(3) the SBS modified pitch in step (1) is sprayed in the mixture A that step (2) obtains, is stirred, then successively
Miberal powder, fiber stabilizer and curing agent is added, stirs evenly to obtain stone mastic asphalt.
10. a kind of preparation method of stone mastic asphalt according to claim 9, which is characterized in that step
(1) SBS modified pitch is heated to 165-175 DEG C in, gathers materials in step (2) and is heated to 180-190 DEG C.
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| CN115353328A (en) * | 2022-07-29 | 2022-11-18 | 华南理工大学 | Electromagnetic induction enhanced nano-modified high-self-healing-performance asphalt mixture and preparation method and application thereof |
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Application publication date: 20190118 |