CN105541181A - Rubber powder pavement material and construction method thereof - Google Patents
Rubber powder pavement material and construction method thereof Download PDFInfo
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- CN105541181A CN105541181A CN201511006495.XA CN201511006495A CN105541181A CN 105541181 A CN105541181 A CN 105541181A CN 201511006495 A CN201511006495 A CN 201511006495A CN 105541181 A CN105541181 A CN 105541181A
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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
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/265—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with rubber or synthetic resin, e.g. with rubber aggregate, with synthetic resin binder
-
- 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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- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a rubber powder pavement material and a construction method thereof. The method comprises the following steps: crushing and grinding broken and scrapped all-steel truck radical tires into rubber powder; preparing rubber asphalt from the rubber powder, a stabilizing additive, a modifying agent and matrix asphalt; preparing the rubber powder pavement material from the rubber asphalt, mineral aggregate and mineral powder according to a proportion; cleaning a sub-layer of a section to be paved; uniformly spreading the heated rubber asphalt on the sub-layer; spreading macadam which is heated to a temperature not lower than 80 DEG C on the rubber asphalt layer; rolling for 3 times in a specified time according to the temperature of the sub-layer, and paving the rubber powder pavement material which is 3.5-5.5cm thick according to an existing method for paving the rubber asphalt pavement material; respectively rolling the rubber powder pavement material in different temperature stages, and uniformly spraying tack coat to complete construction of highway pavement. The pavement material is suitable for pavement of highways in regions with large temperature difference, can be used for solving the problem of highway cracking in the regions with large temperature difference, and lays an excellent foundation for rubber powder application in regions under large temperature difference.
Description
Technical field
The invention belongs to highway surfacing material technical field, relate to a kind of rubber powder ground surface material; The invention still further relates to the constructional method that this ground surface material a kind of lays highway pavement.
Background technology
The development of high-grade highway construction, using character and the function of road pavement are had higher requirement.Practice shows, much more complicated than new highway bituminous pavement of the technical problem that faces in old pavement transformation.Such as, should be noted that the Reflective Cracking Resistance of overlay, high-temperature behavior and the bond effect etc. good with old pavement in old pavement overlay.Many engineerings due to these issue handlings improper, destroy rapidly after causing maintenance, cause the huge waste of maintenance cost, the predicament of be even absorbed in a year annual overhaul, repeatedly repairing.For above technical problem, except improving the structure design of bituminous pavement, Load materials of good performance is adopted also to be an important aspect.Rubber asphalt, due to its excellent pavement performance and the Special Significance to environment protection, is subject to the attention of domestic project circle day by day.
Dry climate district, Shu Zhong temperate zone, Hexi Region of Gansu, rainfall is few, steam output is large, sunshine is long, day and night temperature is remarkable, winter-spring season is not too obvious, and summer is hot and winter is cold, the large sand of wind is many, vegetation is rare, and have typical continental desert climate feature, temperature difference per day is larger.According to climatological data statistics, temperature on average 6.9 DEG C for many years, Extreme Maximum Temperature 38.4 DEG C, Annual lowest climate temperature-31.6 DEG C.Mean annual precipitation 63.3 ~ 86.7mm, belongs to northwest drought VI district in national highway weather Natural Division.By existing application of rubber asphalt when the highway pavement of this area, there is the problem such as stripping of aggregate, ageing of asphalt, maximum disease is crack, and average headway is comparatively large, and be all lateral direction penetrating reflection crack, fracture width is generally about 2.5mm.
Summary of the invention
The object of this invention is to provide a kind of rubber powder ground surface material being applied to temperature difference per day larger area, larger temperature variation can be tolerated, do not occur crack easily.
Another object of the present invention is the constructional method of carrying out highway pavement laying with above-mentioned ground surface material.
For achieving the above object, the technical solution adopted in the present invention is: a kind of rubber powder ground surface material, obtains by the following method:
Step 1: get the all-steel load-bearing radial tire scrapped, broken under normal temperature, separation of iron and fiber, the thick rubber powder that particle diameter is 1 ~ 3mm is ground under normal temperature, be delivered to storage bin after again removing iron and fiber, grind thick rubber powder under normal temperature, obtain particle diameter 40 ~ 120 object rubber powder;
Step 2: by mass percentage, gets the matrix pitch of rubber powder 18 ~ 20%, stabilization aid 3 ~ 7%, properties-correcting agent 0.5 ~ 1.5% and surplus respectively; Matrix pitch is heated to 195 ± 2 DEG C, adds rubber powder and properties-correcting agent, after high shear agitation 2 ~ 5min, adds stabilization aid, stirs 45 ~ 60min, obtain rubber asphalt at the temperature of 180 ~ 190 DEG C;
Step 3: get rubber asphalt, mineral aggregate and breeze, the mass percent of rubber asphalt and mineral aggregate is 7.5 ~ 8.7%, the mass percent of breeze and mineral aggregate is 3 ~ 7%, mineral aggregate is heated to 185 ~ 195 DEG C, add the rubber asphalt that temperature is 180 ~ 190 DEG C, stir 95 ~ 115s, then add the breeze that temperature is 185 ~ 195 DEG C, stir 95 ~ 115s, obtain rubber powder ground surface material;
Described mineral aggregate adopts AR-AC13S type compound, AR-AC-13 type compound or ARHM-13W type compound.
Another technical scheme of the present invention is: a kind of constructional method of laying highway pavement with above-mentioned rubber powder ground surface material, specifically carries out according to the following steps:
Step 1: to needing to lay that the sub-layer in section cleans, drifting dust and cleaning;
Step 2: the rubber asphalt of temperature 180 ~ 190 DEG C is evenly spread on paving sub-layer after the cleaning;
Step 3: the metaling of particle diameter 9.5 ~ 13.2mm is heated to temperature and is not less than 80 DEG C, is spread in uniform on rubber asphalt layer;
Step 4: if sub-layer temperature is more than 40 DEG C, then complete and roll for 3 times in 20min; If sub-layer temperature is 18 ~ 40 DEG C, then in 10min, completes 3 times roll, if sub-layer temperature is lower than 18 DEG C, then stop construction;
Step 5: lay rubber powder ground surface material by the laying method of existing Rubber-Asphalt Pavement material, during laying, in spiral distributor, the height of rubber powder ground surface material is 1/2 ~ 2/3 of spiral distributor height; The temperature of rubber powder ground surface material is not less than 160 DEG C, and coefficient of loose laying is 1.25, paving thickness 3.5 ~ 5.5cm;
Step 6: after laying rubber powder ground surface material, when its temperature is down to 157 ~ 164 DEG C, carries out first time and roll, rolling speed is 2.0km/h; When the rubber powder ground surface material temperature of laying is down to 143 ~ 153 DEG C, carry out second time and roll, rolling speed is 3.0km/h; When the rubber powder ground surface material temperature of laying is down to 100 ~ 104 DEG C, carry out third time and roll, rolling speed is 3.0km/h, obtains rubberized concrete road surface; Afterwards, by existing Rubber-Asphalt Pavement constructional method even spread sticking layer oil on this rubberized concrete road surface, the spread quantity of sticking layer oil is 0.20 ~ 0.30kg/m
2, form stress absorbing layer, complete the construction of highway pavement.
Ground surface material of the present invention is the rubber asphalt cement be suitable under large temperature range utilizing rubber powder to prepare; be applied among road surface; solve the highway crack problem in large temperature difference area; for the rubber powder application in area under the large temperature difference is laid a good foundation, be also the excellent pavement performance of rubber asphalt and the particular embodiment to environment protection Special Significance simultaneously.The preparation of rubber powder ground surface material under large temperature range, not only solves " black pollution " problem of waste rubber, further promotes and economize on resources and environment protection, strengthen the recycling of material, advance the development of material new technology.Also strengthen China's rubber asphalt progress of research, the pavement construction application for rubber asphalt has had certain actual reference, has promoted the further development of rubber asphalt in China simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
The development of high-grade highway construction, using character and the function of road pavement are had higher requirement.Seek that performance is more superior, the modified asphalt material of cheaper further, the pursuit that the person that is still road work is tireless.Carrying out the applied research of rubber asphalt, can expand the space of Material selec-tion on the one hand, prolonging service life of pavement, is the needs of road engineering development; Be the needs recycling damaged tire on the other hand, being the contribution to China environmental protection cause, is a good thing of benefiting the nation and the people.Especially day and night temperature significantly, winter-spring season not too obviously, temperature difference per day compared with large, summer is hot and winter is cold, the large sand of wind is many, vegetation is rare, have the area of typical continental desert climate feature.Easily there is crack in the rubber asphalt material of current use, has influence on the quality of highway pavement, there is huge potential safety hazard.In order to solve above-mentioned problems of the prior art, the invention provides a kind of rubber powder ground surface material, the area with typical continental desert climate feature that day and night temperature is remarkable, temperature difference per day is larger can be applied to, be not easy to occur crack, ensure Pavement Road Surface Quality, eliminate safe hidden trouble.This rubber powder ground surface material obtains by the following method: step 1: get the all-steel load-bearing radial tire scrapped, after whole tire being broken under normal temperature the fragment of 50 × 50mm, the blob of viscose of 10 × 10mm is cut into through rubber breaker twice stranding, separation of iron and fiber, send into fine crusher, under normal temperature, be ground into the thick rubber powder that particle diameter is 1 ~ 3mm, after again removing iron and fiber, be delivered to storage bin, grind thick rubber powder under normal temperature, obtain particle diameter 40 ~ 120 object rubber powder;
In this rubber powder, the content of natural rubber components and the content of rubber hydrocarbon are 33% and 59% respectively.Weight loss on heating≤1.0% of this rubber powder, iron level≤0.03%, fibre content≤0.1%, volume density 260 ~ 460kg/m
3, ash content≤8%, acetone extract≤8%, rubber hydrocarbon content>=42%, content of carbon black>=26%.
9.00R20 type truck tyre, 10.00R20 type truck tyre, 11.00R20 type truck tyre and 12.00R20 type truck tyre that all-steel load-bearing radial tire adopts load-carrying vehicle to scrap.
Step 2: by mass percentage, gets the matrix pitch of rubber powder 18 ~ 20%, stabilization aid 3 ~ 7%, properties-correcting agent 0.5 ~ 1.5% and surplus respectively; Matrix pitch is heated to 195 ± 2 DEG C, adds rubber powder and properties-correcting agent, after high shear agitation 2 ~ 5min, adds stabilization aid, stirs 45 ~ 60min, obtain rubber asphalt at the temperature of 180 ~ 190 DEG C;
180 DEG C of this rubber asphalt rotate viscosity 2.0 ~ 4.0Pas, 25 DEG C of penetration degrees (0.1mm) 40 ~ 80, softening temperature > 58 DEG C, 25 DEG C of recovery of elasticity >, 55%, 5 DEG C of ductility > 20cm.
Stabilization aid adopts Catalytic Cracking Slurry Oil With Furfural to extract oil, vita-inosculation or polyphosphoric acid (PPA) out.
Properties-correcting agent adopts thermoplastic styrene butadiene rubber (SBS).
At the temperature of 180 ~ 190 DEG C, blade stirrer is adopted to stir in step 2.
Step 3: get rubber asphalt, mineral aggregate and breeze, the mass percent of rubber asphalt and mineral aggregate is 7.5 ~ 8.7%, the mass percent of breeze and mineral aggregate is 3 ~ 7%, mineral aggregate is heated to 185 ~ 195 DEG C, add the rubber asphalt that temperature is 180 ~ 190 DEG C, stir 95 ~ 115s, then add the breeze that temperature is 185 ~ 195 DEG C, stir 95 ~ 115s, obtain rubber powder ground surface material.
Breeze is the ore that particle diameter is less than 6mm.
Mineral aggregate adopts AR-AC13S type compound (" Anhui building " 01 phase in 2013 " wide ancestral temple motorway AR-AC13S Rubber-Asphalt Pavement operating technique ", author: Wang Chengbin), AR-AC-13 type compound (Research Institute of Communication of Jiangsu Province " gap gradation rubber asphalt concrete AR-AC-13 construction guidbook ") or ARHM-13W type compound (" rubber asphalt and asphalt mixture design operating technique guide ", Int. of Highway Sciences, Ministry of Communications).
The voidage of obtained rubber powder ground surface material is 3.0 ~ 5.5%, stability is 9.45 ~ 11.03kN.The present invention adopt the rubber method combined with fine grinding technique in small, broken bits by all-steel load-bearing radial tire high-speed damping shear and the working conditions that rubs and " passive temperature liter melts and rises " (passive temperature liter melts to rise to refer in production process does not have external source to promote temperature, only heats up voluntarily by self shearing and friction) process in slightly the plastid of rubber powder open and prepare rubber powder.Simultaneously, each inter process is by air-flow selection by winnowing convey materials, air-flow carries out effective temperature-reducing to material in convey materials process, the temperature of material is pulverized and fine grinding all the time under normal temperature state, and the temperature of equipment residing for material is 60 ~ 70 DEG C, burn or its physicals of bond failure to ensure the unlikely temperature rise of rubber powder too high, the vulcanized rubber powder activity of preparation is high, specific surface area is high, oxy radical content is high, with polymer materials, pitch and concrete have good consistency, and adopt comparatively advanced plane formula fine grinding machine and open refining formula rubber breaker crash manner from linear velocity, velocity ratio with compared with have the different of matter, the rubber powder steady quality produced.
Utilize high-speed shearing equipment to be dispersed in matrix pitch by rubber powder, make the two fully merge in initial reaction stage; Realizing the further growth of rubber asphalt and swelling by simple agitation again, forming qualified product, in order to make rubber powder particle fully swelling, as the foundation selecting churning time when viscosity should be selected to reach maximum and will occur to reduce.Therefore adopt composite stirring mode in the present invention, namely high shear agitation and common blade type stir and share, and churning time gets about 50min.
The rising of temperature of reaction is conducive to the interaction of rubber powder and pitch, but the catabiosis of pitch can be more remarkable; When temperature is too low, sluggish, the time reaching service requirements is longer, and fuel oil consumption significantly increases, cost increase.Test shows, the too high meeting of temperature of reaction causes rubber grain excessive degradation, affects the viscosity of rubber asphalt; Temperature of reaction is lower, then need longer churning time, affect production efficiency, will weigh the impact of these two factors in actual production.The rising of temperature is while promotion rubber powder is swelling, and accelerate the generation of rubber powder scission reaction, rubber powder effective size of grain constantly reduces, and stress concentration phenomenon reduces, and ductility value increases; The increase of rubber powder cracking degree makes the small molecules chain hop count that is scattered in pitch more, and the snappiness of pitch improves, and ductility value increases, therefore along with the rising ductility of temperature of reaction is in increasing progressively Long-term change trend.From the performance of rubber asphalt, the temperature of reaction that the present invention determines is 180 ~ 190 DEG C.
The particle diameter of rubber powder is most important to the performance and reduction engineering cost of improving rubber asphalt.When rubber powder granule is thicker, modified effect is poor, and rubber powder swelling ratio in pitch is more difficult, and swelling rate is slow, swelling limitation, and the network structure of rubber asphalt is perfect not, and asphalt viscosity is less; Although too thin the swelling of rubber powder of rubber powder becomes easy, degree of swelling increases, be conducive to the formation of rubber asphalt network structure, but the desulfurization scission reaction of rubber powder also becomes more remarkable simultaneously, the effective size of grain of rubber powder diminishes, unfavorable to rubber asphalt network structure, and viscosity reduces, in addition the meticulous difficulties in dispersion in pitch of rubber powder and cost is very high unfavorable to economy, does not have good modified effect.Adopt particle diameter 40 ~ 120 object rubber powder in rubber powder ground surface material of the present invention, rubber powder can form good skeleton structure in pitch, just can obtain higher viscosity, obtain good comprehensive use properties through the shorter time.
Rubber powder in rubber powder ground surface material (particularly thick rubber powder) volume is too low, then distant between micelle, and contact each other is comparatively become estranged, and remote action is less, and now thickening pitch is its main effect; Contrary rubber powder volume of working as is excessive, although the rubber powder quantity in unit volume obviously increases, distance between micelle reduces, be conducive to improving the remote action power between micelle, improve many character of pitch, but there is the excessive problem being difficult to produce of agglutinate denseness, also easily cause compound to mix and stir oil mass in process in addition excessive, cause the decline of compound high temperature properties.Therefore, the change of rubber powder volume, not only to take into account the filling effect that rubber powder plays in pitch, also to consider high temperature, the cold property of rubber asphalt, in rubber powder ground surface material of the present invention, the mass percent of rubber powder is 18 ~ 20%, now there is a best network structure in rubber asphalt, and rubber powder plays best filling effect in pitch, and rubber asphalt can obtain good high-temperature behavior and low-temperature performance.
Stabilization aid is equivalent to the soft component in pitch, and it and bituminous matter not only increase the temperature sensitivity of system, improve the stability of system simultaneously, makes pitch deliquescing become soft, improves the stability in storage of modifying asphalt; And saturated point of heavy constituent and bituminous matter not only reduce the temperature sensitivity of system in catalytically cracked oil, exacerbate the unstable of system simultaneously, make that pitch is hardening to become fragile.So the mass percent that in rubber powder ground surface material of the present invention, stabilization aid is taken is 3 ~ 7%.
, high temperature and cold performance test are carried out to rubber powder ground surface material of the present invention:
High-temperature behavior adopts wheel tracking test evaluation, and test conditions: at 60 ± 1 DEG C, carries out wheel tracking test under 0.7 ± 0.05MPa condition, and rut dynamic stability test result is as shown in table 1.
Table 1 wheel tracking test dynamic stability
Crack resistance at low-temperature experiment adopts the small beam experiment, and carry out the evaluation of compound low-temperature performance, test conditions: temperature-20 DEG C, speed 50mm/min, test-results is as shown in table 2.
Table 2 girder pliability test result
As can be seen from Table 1 and Table 2: the rut dynamic stability of rubber powder ground surface material of the present invention and low temperature damage strain property are obviously better than rut dynamic stability and the low temperature damage strain property of existing Rubber-Asphalt Pavement material, illustrate that high temperature resistant property and the resistance to low temperature of rubber powder ground surface material of the present invention are good, be suitable for the area under large temperature range.
, water stabilizing test
Checked the water stabilizing of rubber powder ground surface material of the present invention by immersion Marshall test and indirect tensile test on frozen-thaw, test-results is in table 3 and table 4.
Table 3 immersion Marshall test results contrast
Table 3 and table 4 show, the rubber powder ground surface material of the present invention Marshall's residual stability that soaks is 88.2%, is greater than the residual stability of existing Rubber-Asphalt Pavement material; In freeze-thaw split experiment, the Ratio of split strength of rubber powder ground surface material of the present invention is 85.0, the Ratio of split strength of existing Rubber-Asphalt Pavement material.As can be seen here, the water stability of rubber powder ground surface material of the present invention is better than the water stability of existing Rubber-Asphalt Pavement material.
, anti-fatigue performance test
Adopt four-point bending fatigue test, carry out fatigue property evaluation, the strain of employing is 300 μ ε.The temperature of fatigue test condition is 15 DEG C, and the times of fatigue when modulus is reduced to initial modulus 50%, test-results is as shown in table 5.
Table 5 fatigue test results (15 DEG C)
Table 5 shows, the fatigue life cycle of rubber powder ground surface material of the present invention is much larger than the fatigue life cycle of existing Rubber-Asphalt Pavement material, show that the fatigue property of rubber powder ground surface material of the present invention is good, Reflective Cracking Resistance is comparatively strong, is applicable to the region that crack is more.
Present invention also offers constructional method during a kind of above-mentioned rubber powder ground surface material laying highway pavement, specifically carry out according to the following steps:
Step 1: to needing to lay that the sub-layer in section cleans, drifting dust and cleaning;
Get all-steel load-bearing radial tire, after whole tire being broken under normal temperature the fragment of 50 × 50mm, the blob of viscose of 10 × 10mm is cut into through rubber breaker twice stranding, separation of iron and fiber, send into fine crusher, be ground into the thick rubber powder that particle diameter is 1 ~ 3mm under normal temperature, be delivered to storage bin after again removing iron and fiber, grind thick rubber powder under normal temperature and obtain particle diameter 40 ~ 120 object rubber powder; By mass percentage, the matrix pitch of rubber powder 18 ~ 20%, stabilization aid 3 ~ 7%, properties-correcting agent 0.5 ~ 1.5% and surplus is got respectively; Matrix pitch is heated to 195 ± 2 DEG C, adds rubber powder, after high shear agitation 2 ~ 5min, adds stabilization aid, stirs 45 ~ 60min, obtain rubber asphalt at the temperature of 180 ~ 190 DEG C;
Screening obtains the metaling of particle diameter 9.5 ~ 13.2mm, and in this metaling, particle diameter is less than 10% more than the mass percent of the rubble of 9.5 ~ 13.2mm;
Step 2: evenly spread by the rubber asphalt of temperature 180 ~ 190 DEG C on paving sub-layer after the cleaning, the spread quantity of rubber asphalt is 2.2 ± 0.2kg/m
2, obtain rubber asphalt layer;
Stabilization aid adopts Catalytic Cracking Slurry Oil With Furfural to extract oil, vita-inosculation or polyphosphoric acid (PPA) out.
Properties-correcting agent adopts thermoplastic styrene butadiene rubber (SBS).
Step 3: metaling is heated to temperature and is not less than 80 DEG C, is spread in uniform on rubber asphalt layer, and metaling spread quantity is 10 ~ 12kg/m
2;
The rubble being scattered in outside should be cleaned in time after metaling spreading.In order to avoid crushed stone spreading car and rubber asphalt layer produce adhesion, the load-carrying of crushed stone spreading car wheel can spray water slightly, but watering amount needs strict control, and water can not be caused to trickle on tie coat.
Step 4: adopt the pneumatic-tired rollers of more than 25T to carry out compacting, number of rolling is 3 times; When rolling, if the temperature of sub-layer is more than 40 DEG C, then completes in 20min and roll, if the temperature of sub-layer is at 18 ~ 40 DEG C, then completes in 10min and roll, if sub-layer temperature is lower than 18 DEG C, then stop construction;
Step 5: lay rubber powder ground surface material by the laying method of existing Rubber-Asphalt Pavement material, during laying, in spiral distributor, the height of rubber powder ground surface material is 1/2 ~ 2/3 of spiral distributor height, occurs segregation phenomenon to avoid paving layer; The temperature of rubber powder ground surface material is not less than 160 DEG C, and coefficient of loose laying is 1.25, paving thickness 3.5 ~ 5.5cm;
Step 6: after laying rubber powder ground surface material, when its temperature is down to 157 ~ 164 DEG C, carries out first time and roll, rolling speed is 2.0km/h; When the rubber powder ground surface material temperature of laying is down to 143 ~ 153 DEG C, carry out second time and roll, rolling speed is 3.0km/h; When the rubber powder ground surface material temperature of laying is down to 100 ~ 104 DEG C, carry out third time and roll, rolling speed is 3.0km/h, obtains rubberized concrete road surface; Afterwards, by existing Rubber-Asphalt Pavement constructional method even spread sticking layer oil on this rubberized concrete road surface, the spread quantity of sticking layer oil is 0.20 ~ 0.30kg/m
2, form stress absorbing layer, complete the construction of highway pavement.
Stress absorbing layer constructed after after at least 3 hours, could open to traffic, and the speed of a motor vehicle is no more than 25km/h.Reach after the requirement that is open to traffic until stress absorbing layer, vehicle could normally travel.
Embodiment 1
Get the 9.00R20 type truck tyre scrapped, after whole tire being broken under normal temperature the fragment of 50 × 50mm, the blob of viscose of 10 × 10mm is cut into through rubber breaker twice stranding, separation of iron and fiber, send into fine crusher, be ground into the thick rubber powder that particle diameter is 13mm under normal temperature, be delivered to storage bin after again removing iron and fiber, grind thick rubber powder under normal temperature and obtain particle diameter 40 ~ 120 object rubber powder; By mass percentage, the matrix pitch of rubber powder 18%, Catalytic Cracking Slurry Oil With Furfural extraction oil 3%, thermoplastic styrene butadiene rubber 0.5% and surplus is got respectively; Matrix pitch is heated to 195 DEG C, adds rubber powder and thermoplastic styrene butadiene rubber, after high shear agitation 2min, adds Catalytic Cracking Slurry Oil With Furfural and extracts oil out, stir 45min, obtain rubber asphalt at the temperature of 180 DEG C; Get rubber asphalt, AR-AC13S type compound and breeze, the mass percent of rubber asphalt and AR-AC13S type compound is 7.5%, the mass percent of breeze and AR-AC13S type compound is 3%, by AR-AC13S type mixed material heating to 185 DEG C, add the rubber asphalt that temperature is 180 DEG C, stir 115s, then add the breeze that temperature is 185 DEG C, stir 115s, obtain rubber powder ground surface material.To needing to lay that the sub-layer in section cleans, drifting dust and cleaning; Evenly spread by the rubber asphalt of temperature 180 DEG C on paving sub-layer after the cleaning, the spread quantity of rubber asphalt is 2.2kg/m
2, obtain rubber asphalt layer; The metaling of particle diameter 9.5 ~ 13.2mm is heated to 80 DEG C, is spread in uniform on rubber asphalt layer, metaling spread quantity is 10kg/m
2; The temperature of sub-layer, more than 40 DEG C, adopts the pneumatic-tired rollers of more than 25T in 20min, complete 3 times and rolls; Rubber powder ground surface material is laid by the laying method of existing Rubber-Asphalt Pavement material, during laying, in spiral distributor, the height of rubber powder ground surface material is 1/2 of spiral distributor height, and the temperature of rubber powder ground surface material is not less than 160 DEG C, coefficient of loose laying is 1.25, paving thickness 3.5cm; After laying rubber powder ground surface material, when its temperature is down to 157 DEG C, carries out first time and roll, rolling speed is 2.0km/h; When the rubber powder ground surface material temperature of laying is down to 143 DEG C, carry out second time and roll, rolling speed is 3.0km/h; When the rubber powder ground surface material temperature of laying is down to 100 DEG C, carry out third time and roll, rolling speed is 3.0km/h, obtains rubberized concrete road surface; Afterwards, by existing Rubber-Asphalt Pavement constructional method even spread sticking layer oil on this rubberized concrete road surface, the spread quantity of sticking layer oil is 0.20kg/m
2, form stress absorbing layer, complete the construction of highway pavement.
Embodiment 2
Get the 10.00R20 type truck tyre scrapped, after whole tire being broken under normal temperature the fragment of 50 × 50mm, the blob of viscose of 10 × 10mm is cut into through rubber breaker twice stranding, separation of iron and fiber, send into fine crusher, be ground into the thick rubber powder that particle diameter is 1 ~ 3mm under normal temperature, be delivered to storage bin after again removing iron and fiber, grind thick rubber powder under normal temperature and obtain particle diameter 40 ~ 120 object rubber powder; By mass percentage, the matrix pitch of rubber powder 20%, vita-inosculation 7%, thermoplastic styrene butadiene rubber 1.5% and surplus is got respectively; Matrix pitch is heated to 197 DEG C, adds rubber powder and thermoplastic styrene butadiene rubber, after high shear agitation 5min, adds vita-inosculation, stirs 60min, obtain rubber asphalt at the temperature of 190 DEG C; Get rubber asphalt, AR-AC-13 type compound and breeze, the mass percent of rubber asphalt and AR-AC-13 type compound is 8.7%, the mass percent of breeze and AR-AC-13 type compound is 7%, by AR-AC-13 type mixed material heating to 195 DEG C, add the rubber asphalt that temperature is 190 DEG C, stir 95s, then add the breeze that temperature is 195 DEG C, stir 95s, obtain rubber powder ground surface material.To needing to lay that the sub-layer in section cleans, drifting dust and cleaning; Evenly spread by the rubber asphalt of temperature 190 DEG C on paving sub-layer after the cleaning, the spread quantity of rubber asphalt is 2.4kg/m
2, obtain rubber asphalt layer; The metaling of particle diameter 9.5 ~ 13.2mm is heated to 100 DEG C, is spread in uniform on rubber asphalt layer, metaling spread quantity is 12kg/m
2; The temperature of sub-layer is 40 DEG C, adopts the pneumatic-tired rollers of more than 25T in 10min, complete 3 times and rolls; Rubber powder ground surface material is laid by the laying method of existing Rubber-Asphalt Pavement material, during laying, in spiral distributor, the height of rubber powder ground surface material is 2/3 of spiral distributor height, and the temperature of rubber powder ground surface material is not less than 160 DEG C, coefficient of loose laying is 1.25, paving thickness 5.5cm; After laying rubber powder ground surface material, when its temperature is down to 164 DEG C, carries out first time and roll, rolling speed is 2.0km/h; When the rubber powder ground surface material temperature of laying is down to 153 DEG C, carry out second time and roll, rolling speed is 3.0km/h; When the rubber powder ground surface material temperature of laying is down to 104 DEG C, carry out third time and roll, rolling speed is 3.0km/h, obtains rubberized concrete road surface; Afterwards, by existing Rubber-Asphalt Pavement constructional method even spread sticking layer oil on this rubberized concrete road surface, the spread quantity of sticking layer oil is 0.30kg/m
2, form stress absorbing layer, complete the construction of highway pavement.
Embodiment 3
Get the 11.00R20 type truck tyre scrapped, after whole tire being broken under normal temperature the fragment of 50 × 50mm, the blob of viscose of 10 × 10mm is cut into through rubber breaker twice stranding, separation of iron and fiber, send into fine crusher, be ground into the thick rubber powder that particle diameter is 1 ~ 3mm under normal temperature, be delivered to storage bin after again removing iron and fiber, grind thick rubber powder under normal temperature and obtain particle diameter 40 ~ 120 object rubber powder; By mass percentage, the matrix pitch of rubber powder 19%, polyphosphoric acid 5%, thermoplastic styrene butadiene rubber 1.0% and surplus is got respectively; Matrix pitch is heated to 193 DEG C, adds rubber powder and thermoplastic styrene butadiene rubber, after high shear agitation 3.5min, adds polyphosphoric acid, stirs 52min, obtain rubber asphalt at the temperature of 185 DEG C; Get rubber asphalt, ARHM-13W type compound and breeze, the mass percent of rubber asphalt and ARHM-13W type compound is 8.1%, the mass percent of breeze and ARHM-13W type compound is 5%, by ARHM-13W type mixed material heating to 190 DEG C, add the rubber asphalt that temperature is 185 DEG C, stir 105s, then add the breeze that temperature is 190 DEG C, stir 105s, obtain rubber powder ground surface material.To needing to lay that the sub-layer in section cleans, drifting dust and cleaning; Evenly spread by the rubber asphalt of temperature 185 DEG C on paving sub-layer after the cleaning, the spread quantity of rubber asphalt is 2.0kg/m
2, obtain rubber asphalt layer; The metaling of particle diameter 9.5 ~ 13.2mm is heated to 90 DEG C, is spread in uniform on rubber asphalt layer, metaling spread quantity is 11kg/m
2; The temperature of sub-layer is 18 DEG C, adopts the pneumatic-tired rollers of more than 25T in 10min, complete 3 times and rolls; Rubber powder ground surface material is laid by the laying method of existing Rubber-Asphalt Pavement material, during laying, in spiral distributor, the height of rubber powder ground surface material is 7/12 of spiral distributor height, and the temperature of rubber powder ground surface material is not less than 160 DEG C, coefficient of loose laying is 1.25, paving thickness 4.5cm; After laying rubber powder ground surface material, when its temperature is down to 161 DEG C, carries out first time and roll, rolling speed is 2.0km/h; When the rubber powder ground surface material temperature of laying is down to 148 DEG C, carry out second time and roll, rolling speed is 3.0km/h; When the rubber powder ground surface material temperature of laying is down to 102 DEG C, carry out third time and roll, rolling speed is 3.0km/h, obtains rubberized concrete road surface; Afterwards, by existing Rubber-Asphalt Pavement constructional method even spread sticking layer oil on this rubberized concrete road surface, the spread quantity of sticking layer oil is 0.25kg/m
2, form stress absorbing layer, complete the construction of highway pavement.
Embodiment 4
Get the 12.00R20 type truck tyre scrapped, by method obtained rubber powder, rubber asphalt and the rubber powder ground surface material successively of embodiment 1, rubber asphalt layer is obtained again by the method for embodiment 1, after spreading metaling, the temperature of sub-layer is 29 DEG C, adopts the pneumatic-tired rollers of more than 25T in 10min, complete 3 times and rolls; Then, the construction of highway pavement is completed by the method for embodiment 1.
Claims (6)
1. a rubber powder ground surface material, is characterized in that, this ground surface material obtains by the following method:
Step 1: get the all-steel load-bearing radial tire scrapped, broken under normal temperature, separation of iron and fiber, the thick rubber powder that particle diameter is 1 ~ 3mm is ground under normal temperature, be delivered to storage bin after again removing iron and fiber, grind thick rubber powder under normal temperature, obtain particle diameter 40 ~ 120 object rubber powder;
Step 2: by mass percentage, gets the matrix pitch of rubber powder 18 ~ 20%, stabilization aid 3 ~ 7%, properties-correcting agent 0.5 ~ 1.5% and surplus respectively; Matrix pitch is heated to 195 ± 2 DEG C, adds rubber powder and properties-correcting agent, after high shear agitation 2 ~ 5min, adds stabilization aid, stirs 45 ~ 60min, obtain rubber asphalt at the temperature of 180 ~ 190 DEG C;
Step 3: get rubber asphalt, mineral aggregate and breeze, the mass percent of rubber asphalt and mineral aggregate is 7.5 ~ 8.7%, the mass percent of breeze and mineral aggregate is 3 ~ 7%, mineral aggregate is heated to 185 ~ 195 DEG C, add the rubber asphalt that temperature is 180 ~ 190 DEG C, stir 95 ~ 115s, then add the breeze that temperature is 185 ~ 195 DEG C, stir 95 ~ 115s, obtain rubber powder ground surface material;
Described mineral aggregate adopts AR-AC13S type compound, AR-AC-13 type compound or ARHM-13W type compound.
2. rubber powder ground surface material according to claim 1, is characterized in that, the stabilization aid in described step 2 adopts Catalytic Cracking Slurry Oil With Furfural to extract oil, vita-inosculation or polyphosphoric acid out.
3. rubber powder ground surface material according to claim 1, is characterized in that, the properties-correcting agent in described step 2 adopts thermoplastic styrene butadiene rubber.
4. lay a constructional method for highway pavement with rubber powder ground surface material described in claim 1, it is characterized in that, specifically carry out according to the following steps:
Step 1: to needing to lay that the sub-layer in section cleans, drifting dust and cleaning;
Step 2: the rubber asphalt of temperature 180 ~ 190 DEG C is evenly spread on paving sub-layer after the cleaning;
Step 3: the metaling of particle diameter 9.5 ~ 13.2mm is heated to temperature and is not less than 80 DEG C, is spread in uniform on rubber asphalt layer;
Step 4: if sub-layer temperature is more than 40 DEG C, then complete and roll for 3 times in 20min; If sub-layer temperature is 18 ~ 40 DEG C, then in 10min, completes 3 times roll, if sub-layer temperature is lower than 18 DEG C, then stop construction;
Step 5: lay rubber powder ground surface material by the laying method of existing Rubber-Asphalt Pavement material, during laying, in spiral distributor, the height of rubber powder ground surface material is 1/2 ~ 2/3 of spiral distributor height; The temperature of rubber powder ground surface material is not less than 160 DEG C, and coefficient of loose laying is 1.25, paving thickness 3.5 ~ 5.5cm;
Step 6: after laying rubber powder ground surface material, when its temperature is down to 157 ~ 164 DEG C, carries out first time and roll, rolling speed is 2.0km/h; When the rubber powder ground surface material temperature of laying is down to 143 ~ 153 DEG C, carry out second time and roll, rolling speed is 3.0km/h; When the rubber powder ground surface material temperature of laying is down to 100 ~ 104 DEG C, carry out third time and roll, rolling speed is 3.0km/h, obtains rubberized concrete road surface; Afterwards, by existing Rubber-Asphalt Pavement constructional method even spread sticking layer oil on this rubberized concrete road surface, the spread quantity of sticking layer oil is 0.20 ~ 0.30kg/m
2, form stress absorbing layer, complete the construction of highway pavement.
5. constructional method according to claim 4, is characterized in that, in described step 2, the spread quantity of rubber asphalt is 2.2 ± 0.2kg/m
2.
6. constructional method according to claim 4, is characterized in that, described step 3 medium stone material spread quantity is 10 ~ 12kg/m
2.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108221560A (en) * | 2017-12-30 | 2018-06-29 | 中铁十八局集团第五工程有限公司 | The construction technology on rubber powder modified asphalt road surface |
| CN109053033A (en) * | 2018-06-20 | 2018-12-21 | 河南城建学院 | Waste and old reclaimed rubber sole powder composite waste clothing regenerated fiber enhancing asphalt and preparation method thereof |
| CN114508018A (en) * | 2022-03-28 | 2022-05-17 | 河北建设集团卓诚路桥工程有限公司 | Construction method for upper surface layer by using high-mixing-amount rubber powder asphalt concrete |
| CN114561846A (en) * | 2022-03-01 | 2022-05-31 | 江西省交通工程集团建设有限公司 | Construction method of foamed asphalt warm-mix recycled pavement |
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| CN102453335A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Environment-friendly oil-resistant asphalt pavement material and preparation method thereof |
| CN104446157A (en) * | 2014-10-31 | 2015-03-25 | 扬州大学 | Composite modified asphalt mixture of rubber powder with high anti-rutting performance and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453335A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Environment-friendly oil-resistant asphalt pavement material and preparation method thereof |
| CN104446157A (en) * | 2014-10-31 | 2015-03-25 | 扬州大学 | Composite modified asphalt mixture of rubber powder with high anti-rutting performance and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108221560A (en) * | 2017-12-30 | 2018-06-29 | 中铁十八局集团第五工程有限公司 | The construction technology on rubber powder modified asphalt road surface |
| CN109053033A (en) * | 2018-06-20 | 2018-12-21 | 河南城建学院 | Waste and old reclaimed rubber sole powder composite waste clothing regenerated fiber enhancing asphalt and preparation method thereof |
| CN114561846A (en) * | 2022-03-01 | 2022-05-31 | 江西省交通工程集团建设有限公司 | Construction method of foamed asphalt warm-mix recycled pavement |
| CN114508018A (en) * | 2022-03-28 | 2022-05-17 | 河北建设集团卓诚路桥工程有限公司 | Construction method for upper surface layer by using high-mixing-amount rubber powder asphalt concrete |
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