CN101851890A - Fiber bitumen macadam seal coat method - Google Patents
Fiber bitumen macadam seal coat method Download PDFInfo
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- CN101851890A CN101851890A CN201010188462A CN201010188462A CN101851890A CN 101851890 A CN101851890 A CN 101851890A CN 201010188462 A CN201010188462 A CN 201010188462A CN 201010188462 A CN201010188462 A CN 201010188462A CN 101851890 A CN101851890 A CN 101851890A
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Abstract
The invention discloses a fiber bitumen macadam seal coat method, which comprises the following steps of: (1) preparing emulsified bitumen, namely uniformly mixing bitumen with liquid soap in a volume ratio of 62.8:37.2, maintaining the temperature of between 60 and 70 DEG C for 24 hours, preparing the emulsified bitumen, adding modifier latex into the emulsified bitumen and stirring uniformly to obtain the modified emulsified bitumen; (2) spraying a first layer of modified emulsified bitumen; (3) spraying a layer of fiber, wherein the using amount of the fiber is between 50 and 70 g/cm<2>, and the length is 60mm; (4) spraying a second layer of modified emulsified bitumen; (5) spraying macadam; and (6) rolling, namely rolling for 2 to 5 times, wherein the primary pressing speed does not exceed 2km/h, and the repressing rolling speed is controlled to between 2.0 and 3.0 km/h. The fiber bitumen macadam seal coat method has the advantages that: (1) the fiber bitumen macadam seal coat has good stress absorption and dispersion capacity; (2) the fiber bitumen macadam seal coat has high wear resistance for road surfaces; (3) the fiber bitumen macadam seal coat has high waterproof performance for road surfaces; (4) the fiber bitumen macadam seal coat has high stability for road surfaces; and (5) the fiber bitumen macadam seal coat has construction rapidness.
Description
Technical field:
The invention belongs to the highway maintenance field, relate to a kind of fiber bitumen macadam seal coat method, especially a kind of China's southeastern coast summer hot winter-warm syndrome area fiber bitumen macadam seal coat method that is applicable to.
Background technology:
The measure of existing highway preventive maintenance has slurry seal, crushed stone sealing etc.
Slurry Seal Technology: be to utilize materials such as mulseal, aggregate, mineral fines, water and chemical addition agent formation, concentrate and be stated from asphalt slurry seal machine, and by the seal machine with its mix and stir into pasty state according to a certain percentage, uniform slurry mixture flows, evenly pave on the road surface, form closely knit, firm, wear-resisting surperficial seal.
Because slurry seal has good technical performance, China has done the great deal of experimental application in the slurry seal application facet, be mainly used in the preventive maintenance measure of old asphalt pavement at present, fatigue is appearring, on the road surface of cracking, loose, aging and wearing and tearing after the usefulness, make road surface after the maintenance have waterproof, antiskid, characteristics such as wear-resisting; The coarse grain formula bituminous concrete waterproof seal of new making and abrasion seal; Be used to improve the abrasion resisting performance of sand-gravel surface, prevent airborne dust and the last seal that improves driving condition; Cement concrete pavement produces crack, pitted skin or slightly not at ordinary times, adopt emulsified asphalt slurry seal after, can improve the outward appearance on road surface, improve the planeness on road surface, prolong the application life of cement concrete pavement.
Crushed stone sealing: spill the cloth heated bitumen at old road surfaces earlier,, spill the cloth consumption and be about 1.2kg/m
2～1.6kg/m
2About heated bitumen (pitch label one identical) or 2.0kg/m with road surface upper layer pitch
2About the SBS polymer modified asphalt, and then spreading rubble in the above, the seal that forms through the rubber-tyred roller roller-compaction.
The early water breakoff phenomenon of China's asphalt pavement of highway is quite general, and breakoff phenomenon has multiple, and light and heavy degree differs.Speedway begins to build preceding more than 10 years, and the principal mode of water destruct is purt slurry, check crack, deformation and hole, hole, push loose and serious rut groove.Water destruct had both occurred on the pitch concrete pavement, also occurred on modified asphalt concrete surface layer and the modified asphalt SMA surface layer.Therefore crushed stone sealing is mainly used in order to prevent that the damage by water evil from appearring in flexible pavement; Prevent that the road table from oozing under water, the roadbed supporting capacity is descended significantly, cause the phenomenon of road structure destruction.
The highway maintenance measure of China has slurry seal, little table place, crushed stone sealing etc.These several technology can be improved the service property (quality) of old pavement, reduce check crack, improve planeness, improve cling property, prevent oozing or the like under water, but in practice of construction, can have a lot of problems, seriously influenced the functional performance of these several technology, deviated from their design original intention, particular problem is as follows:
Crushed stone sealing tends to occur following problem when construction:
(1) bellding: the part first blackening of losing lustre in the middle of the road surface of bellding, appear at wheelmark then, the oil reservoir that rises on the road surface and liquefied, the liquid oil that rises moves focusing to the both sides, road surface, forms the softening oil bag.If imperfect bonding between oil reservoir, oil reservoir can be glued by wheel, and decortication is so that form diseases such as cheating groove.The oilstone piece that has been glued splashes the road surface, other places and forms hard oil bag again.
(2) hard oil bag: this oil bag bottom is stable, because the top layer aggregate is few, local fines is few, contains
Oil mass is excessive, under the driving effect, forms the hard oil bag.The easier generation oil bag at the bend place, construction is careless, and oily car, oil drum leak and in time remove, and also can produce the oil bag.
The consistent lubricant bag: because the bottom water content is excessive, water evaporates is not come out, and rests on bottom, makes surface course and bottom form two skins, under the effect that driving rolls back and forth, just produces unsettled consistent lubricant bag.
(3) decortication: layer spread method construction, between the table place is two-layer up and down, isolate because of humidity or surface dust, powder, influence the bonding between the mineral aggregate, and upper strata oil plant viscosity is big, does not have timely spreading maintenance behind the anti-oil, surface layer is glued by wheel; Surface course compound mix is irregular, causes local bitumen aggregate ratio too small, peels off under the driving vibration after the moulding.
(4) pitted skin: oil reservoir or sewing disappear, and coarse fodder exposes, and the road surface is not close, so that infiltration, pockmark occurs, form pitted skin.
The common disease of slurry seal has following several:
(1) the paving layer color is inconsistent: the paving layer that has just paved, and because of the degree of drying difference, color is also different to the degree that black changes by brown, and this is a normal phenomenon.During bone dry, color is still different after three days, and reason is a slurry mixture bitumen aggregate ratio difference, and paving layer is not caught in the rain or open to traffic before the breakdown of emulsion moulding fully.
(2) bellding: the slurry mixture bitumen aggregate ratio is excessive, and there is the bellding phenomenon on former road surface, or local low-lying the making due to emulsion concentrates in former road surface.
(3) loose: because bitumen aggregate ratio is too small, fines is very few in the mineral aggregate, or is not caught in the rain before the complete breakdown of emulsion moulding of paving layer, should remove heavily shop, or carry out front cover with emulsion.
(4) variation of surface roughness and saturation ratio: mineral aggregate gradation is irregular, slurry mixture mixes and stirs segregation phenomenon in the transportation, the slurry mixture that paves in the groove is very few, former road surface slippery degree is different, the slurry mixture denseness is inconsistent, bitumen aggregate ratio is inconsistent, and open to traffic causes before the incomplete breakdown of emulsion moulding of paving layer.
In view of above situation, proposed this new technique of fiber bitumen macadam seal coat old road has been maintained.The fiber bitumen macadam seal coat technology is meant and adopts the fiber bitumen macadam seal coat nucleus equipment to spill (spreading) cloth bituminous binder and fiber simultaneously, spreading rubble in the above forms the new wearing layer or a kind of new road construction construction and the maintenance technology in stress absorption intermediate layer after rolling then.In the fiber bitumen macadam seal coat construction, be disorderly to even distribution in the two-layer asphalt binder that evenly spills cloth up and down through the fiber of the broken cutting of special technology, overlap joint forms the network winding structure with asphalt binder mutually, and similar one deck has high resiliency and high-intensity protection gauze pad.It has good stress absorption and dispersibility, and has superpower water-proof function, can effectively prevent reflection crack.Fiber bitumen macadam seal coat is specially adapted to old asphalt pavement (or newly-built roadbed), the surface layer inter-laminar stress absorbs intermediate layer and the construction of original old asphalt pavement wearing layer; effective protective effect is played in new and old asphalt roads construction and maintenance, more can be prolonged its curing period and service life.
Summary of the invention:
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of fiber bitumen macadam seal coat method be provided:
(1) preparation mulseal: according to the volume ratio of pitch and soap lye is that 62.8: 37.2 ratio mixes and is incubated 0.5-12 hour at 60 ℃-70 ℃, is mixed with mulseal; Add to account for its mass percent 2.5-3.5% modifier latex and to be stirred at mulseal and evenly obtain modified emulsifying asphalt;
(2) spill cloth first floor modified emulsifying asphalt;
(3) spill cloth one deck fiber: the consumption of fiber is preferably 50-70g/m
2, length 60mm;
(4) spill cloth second layer modified emulsifying asphalt;
(5) spill the cloth rubble;
(6) roll: roll 2～5 times, first pressing speed is no more than 2km/h, presses rolling speed should be controlled at 2.0-3.0km/h again.
Use Sai Gema distribution vehicle in described step (2)-(4) spills cloth; The speed of a motor vehicle of described Sai Gema distribution vehicle is controlled at 3-4.5km/h, and the best speed of a motor vehicle is 3.6km/h.
Described step (6) rolls with the 26T pneumatic-tired rollers.
This fiber bitumen macadam seal coat match ratio is to be directed to China southeastern coastal areas specially to research and develop, and in use shows good result of use, and is specific as follows:
(1) fiber bitumen macadam seal coat has good stress absorption and dispersibility;
Fiber bitumen macadam seal coat with network winding unique texture owing to the characteristic that the high tensile of fiber own is stretched intensity and high elastic modulus, has improved tension, shearing resistance, resistance to compression and the impact strength of seal effectively.Tension force that lower floor bears and the generation that has effectively suppressed the crack have been reduced by fiber bitumen macadam seal coat large-area dispersion; It can absorb and disperse the reflection stress with regard to flexible pavement primary fracture or basic unit on the other hand, eliminating the stress of old asphalt pavement crack tip generation concentrates, the effectively appearance in inhibitory reflex crack, effectively stop the pavement destruction that causes because of vehicle-mounted overload, greatly improved the application life of road.
Has high-wearing feature when (2) fiber bitumen macadam seal coat uses on the road surface;
Behind the fiber bitumen macadam seal coat equipment construction, be right after and carry out the gravel aggregate spreading thereafter, enter gathering materials behind the spreading in the net structure that forms by fiber and asphalt binder, the combined material net structure that gathers materials behind the compaction moulding tightly wraps, formed a compound mechanics interlocking system, fiber, pitch and aggregate closely link to each other, effectively suppressed aggregate slippage, come off.Therefore, adopt fiber bitumen macadam seal coat to carry out the wearing layer construction and can greatly improve the abrasion resistance on road surface, increase the service life.
Has high water proofing property when (3) fiber bitumen macadam seal coat uses on the road surface;
Fiber bitumen macadam seal coat with unique network structure and comprehensive mechanical property is as flexible pavement wearing layer and maintenance construction, the south winter-warm syndrome is in season, fiber bitumen macadam seal coat is because the high elastic modulus value, stretching force is strong, its tensile strength is far longer than contraction tensile stress or the stretching strain that variations in temperature is brought, reduce the low-temperature embrittleness of surface layer, can effectively suppress conventional crack---the generation of low temperature shrinkage crack of flexible pavement, avoided " enemy "---the destruction of water of surface layer maximum.
Has high stability when (4) fiber bitumen macadam seal coat uses on the road surface;
The mechanism that the binding fiber bitumen macadam seal coat forms as can be known, its structure is that one deck pitch+one deck fiber+one deck pitch is constructed+the interactional fine and close network winding structure of one deck that one deck rubble forms continuously.Layers of asphalt spill cloth continuously; improved the seal of seal more; the fiber that in addition plays reinforcement and bridge joint effect in the structure plays extremely strong suction-operated for front and back layers of asphalt binder; it is the oil content in the adsorptive pitch easily; increase its viscosity and adhesion; can effectively stop flowing of pitch; on original road surface, form one deck compact protective film; pitch is played high-temperature stable; the effect that toughness reinforcing resistance is split; thereby the pavement destruction of having avoided the high temperature bellding to cause; protected the early damage of road foundation better, the life-span of having stablized road because of the water infiltration.
(5) fiber bitumen macadam seal coat has quick construction.
Accelerating maintenance construction speed, shortening the open to traffic time also is the embodiment of weighing road maintenance technology advance.The fiber bitumen macadam seal coat car is finished layers of asphalt simultaneously and is spilt cloth, one deck fiber spreading on an equipment.After pitch, fiber spilt (spreading) cloth, broken stone distributor carried out one deck rubble spreading at once, finished the fiber bitumen macadam seal coat construction at once.This continuous construction technology has greatly shortened the curing time of flexible pavement, has shortened the time of open to traffic.
Description of drawings:
Fig. 1 is a flow chart of the present invention.
The specific embodiment:
Below in conjunction with accompanying drawing the present invention is done to describe in further detail, referring to Fig. 1:
Implementation column 1
A kind of fiber bitumen macadam seal coat method:
(1) preparation mulseal: according to the volume ratio of pitch and soap lye is that 62.8: 37.2 ratio mixes and is incubated 0.5 hour at 60 ℃, is mixed with mulseal; Add to account for its mass percent 2.5% modifier latex and to be stirred at mulseal and evenly obtain modified emulsifying asphalt;
(2) spill cloth first floor modified emulsifying asphalt;
(3) spill cloth one deck fiber: the consumption of fiber is preferably 50-70g/m
2, length 60mm;
(4) spill cloth second layer modified emulsifying asphalt;
(5) spill the cloth rubble;
(6) roll: roll 2～5 times, first pressing speed is no more than 2km/h, presses rolling speed should be controlled at 2.0km/h again.
Use Sai Gema distribution vehicle in described step (2)-(4) spills cloth; The speed of a motor vehicle of described Sai Gema distribution vehicle is controlled at 3km/h, and the best speed of a motor vehicle is 3.6km/h.
Described step (6) rolls with the 26T pneumatic-tired rollers.
Implementation column 2
A kind of fiber bitumen macadam seal coat method:
(1) preparation mulseal: according to the volume ratio of pitch and soap lye is that 62.8: 37.2 ratio mixes and is incubated 12 hours at 70 ℃, is mixed with mulseal; Add to account for its mass percent 3.5% modifier latex and to be stirred at mulseal and evenly obtain modified emulsifying asphalt;
(2) spill cloth first floor modified emulsifying asphalt;
(3) spill cloth one deck fiber: the consumption of fiber is preferably 70g/m
2, length 60mm;
(4) spill cloth second layer modified emulsifying asphalt;
(5) spill the cloth rubble;
(6) roll: roll 2～5 times, first pressing speed is no more than 2km/h, presses rolling speed should be controlled at 3.0km/h again.
Use Sai Gema distribution vehicle in described step (2)-(4) spills cloth; The speed of a motor vehicle of described Sai Gema distribution vehicle is controlled at 3-4.5km/h, and the best speed of a motor vehicle is 3.6km/h.
Described step (6) rolls with the 26T pneumatic-tired rollers.
Implementation column 3
A kind of fiber bitumen macadam seal coat method:
(1) preparation mulseal: according to the volume ratio of pitch and soap lye is that 62.8: 37.2 ratio mixes and is incubated 6 hours at 65 ℃, is mixed with mulseal; Add to account for its mass percent 3% modifier latex and to be stirred at mulseal and evenly obtain modified emulsifying asphalt;
(2) spill cloth first floor modified emulsifying asphalt;
(3) spill cloth one deck fiber: the consumption of fiber is preferably 60g/m
2, length 60mm;
(4) spill cloth second layer modified emulsifying asphalt;
(5) spill the cloth rubble;
(6) roll: roll 2～5 times, first pressing speed is no more than 2km/h, presses rolling speed should be controlled at 2.5km/h again.
Use Sai Gema distribution vehicle in described step (2)-(4) spills cloth; The speed of a motor vehicle of described Sai Gema distribution vehicle is controlled at 4km/h, and the best speed of a motor vehicle is 3.6km/h.
Described step (6) rolls with the 26T pneumatic-tired rollers.
Match ratio of the present invention is as follows:
(1) employed material is as follows:
Matrix pitch: Korea S SK-70 pitch
Emulsifier: the cation that Dutch Aksu company produces splits type emulsifier, model E-4819 soon
Modifier latex: SBR latex (Indulin1468), cationic, white emulsion, effective content 65%, Shanghai is tieed up assorted big gram company and is produced
Fiber: glass fiber, tex 2400tex
Every index of modified emulsifying asphalt and material therefor that we produce are as follows; Oil-water ratio 62.8: 37.2
The crushing technique requirement
| Index | Speedway and Class I highway | Other grades | Test method |
| Surface course | Other level | Highway | ||
| Building stones crush values (%) | ??≤26 | ??≤28 | ??≤30 | ??T0316 |
| Los Angeles abrasion loss (%) | ??≤28 | ??≤30 | ??≤35 | ??T0317 |
| Performance relative density (t/m 3) | ??≥2.60 | ??≥2.50 | ??≥2.45 | ??T0304 |
| Water absorption rate (%) | ??≤2.0 | ??≤2.0 | ??≤3.0 | ??T0304 |
| Soundness (%) | ??≤12 | ??≤12 | ??- | ??T0304 |
| Faller gill shape granule content (compound) (%) wherein particle diameter greater than 9.5mm wherein particle diameter less than 9.5mm | ????≤15??≤12??≤18 | ????≤18??≤15??≤20 | ????20??-??- | ??????T0312 |
| WATER-WASHING METHOD＜0.075mm granule content (%) | ??≤1 | ??≤1 | ??≤1 | ??T0310 |
| Soft rock content (%) | ??≤3 | ??≤5 | ??≤5 | ??T0320 |
Used rubble proportioning is as follows:
| Ballast grain sizes | Divide meter to tail over |
| Greater than 4.75mm | ??7％ |
| Ballast grain sizes | Divide meter to tail over |
| ??3.35～4.75mm | ??43.5％ |
| ??2.36～3.35mm | ??41％ |
| ??1.18～2.36mm | ??5.6％ |
| ??0.75～1.18mm | ??2.2％ |
| Less than 0.075mm | ??0.7％ |
The technical requirements of fiber:
1. good cutting, the static that produces when continuous high speed cuts is few;
2. the efficient that is dispersed into precursor after the roving cutting wants high, also is beam splitting rate height, requires more than 90% usually;
3. the precursor after short the cutting has the good mould that covers, and can cover each corner of mould;
4. resin impregnated is fast, is easy to be put down and be easy to drive by the roller roller bubble;
5. cake moves back that to separate performance good, and textured yarn density is even, is suitable for various spray guns and fiber and transports system.
(2) production of mulseal
1. calculate raw-material consumptions such as water, emulsifier, pH value conditioning agent, stabilizing agent according to output and technical requirements.Water is heated to 60 " C～70 ℃ (actual temp should be decided on the emulsification technology condition), quantitative meter is got the needed water yield and (should the moisture in the raw material such as emulsifier, pH value conditioning agent be counted) to the soap lye preparing tank, and 60 ℃ of-70 ℃ of insulations.
2. quantitatively add emulsifier, be stirred to dissolving; Add hydrochloric acid gradually, the limit edged stirs, to the pH value that requires
3. the ratio of determining pitch and soap lye is 62.8: 37.2.Pitch dehydration and remove impurity, delivering to the heated bitumen jar then, to be heated to emulsification temperature required, and insulation is delivered to mulser to the pitch of getting ready and the soap lye that prepared by a certain percentage and carried out emulsification.Produce required mulseal.
4. give to add modifier latex in the mulseal of making, and be stirred to evenly and get final product.
(3) making of fiber bitumen macadam seal coat
1. mulseal and fiber spills (spreading) cloth
To after the finishing dealing with of former road surface, spill cloth first floor emulsified modified asphalt with France's match trellis code fiber seal equipment, spill cloth one deck fiber simultaneously, the consumption of fiber is preferably 50-70g/m
2, length 60mm is advisable.Spill cloth second layer mulseal then, emulsified modified asphalt spills cloth amount 1.5-2.0kg/m
2(it is the total amount of two coating emulsified asphalts) spills the cloth uniformity for what guarantee pitch, must take measures at the terminus that spills cloth, and it is excessive or too small to avoid spilling the cloth amount, should adjust width at the transverse lap place, avoids lap-joint to spray too much or leak and spills phenomenon.The speed of a motor vehicle of Sai Gema distribution vehicle is controlled at 3-4.5km/h, and the best speed of a motor vehicle is 3.6km/h.
2. rubble spills cloth.
The distribution vehicle of rubble spills cloth immediately following carrying out rubble 20～40 meters of fiber asphalt distribution vehicles, the rubble truck spreader spreading of should moveing backward, and the speed of a motor vehicle of the speed of a motor vehicle and Sai Gema distribution vehicle is complementary.Spill the appropriate to the occasion truck spreader of opening in advance of cloth in the joint, should close in advance, should in time handle, guarantee that spreading is even the zone that spreading is not in place in the joint that modified emulsifying asphalt does not spray.The rubble spreading was all finished before the emulsified modified asphalt breakdown of emulsion.
3. roll
The rubble spreading should roll with the 26T pneumatic-tired rollers after finishing immediately, rolls to be no less than 2～3 times, and first pressing speed should not surpass 2km/h, presses rolling speed to be controlled at about 2.5km/h again.Through the gravel particle immersion degree after the voltage stabilizing is about 1/2 of particle footpath.If when framing is constructed, should carry out the processing of overlapping the slot.Two width of cloth lap-joints, first width of cloth persists 5-10 cm width rubble, and to spill the cloth amount few, and second width of cloth spills a small amount of rubble of cloth again along reserving the edge, and twice rubble spills that the cloth amount should to spill the cloth amount identical with the whole rubble in road surface
According to above-mentioned steps promptly can success carry out the making of fiber bitumen macadam seal coat in southeastern coast summer hot epidemic febrile diseases in winter area.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (3)
1. fiber bitumen macadam seal coat method is characterized in that:
(1) preparation mulseal: according to the volume ratio of pitch and soap lye is that 62.8: 37.2 ratio mixes and is incubated 0.5-12 hour at 60 ℃-70 ℃, is mixed with mulseal; Add to account for its mass percent 2.5-3.5% modifier latex and to be stirred at mulseal and evenly obtain modified emulsifying asphalt;
(2) spill cloth first floor modified emulsifying asphalt;
(3) spill cloth one deck fiber: the consumption of fiber is preferably 50-70g/m
2, length 60mm;
(4) spill cloth second layer modified emulsifying asphalt;
(5) spill the cloth rubble;
(6) roll: roll 2～5 times, first pressing speed is no more than 2km/h, presses rolling speed should be controlled at 2.0-3.0km/h again.
2. a kind of according to claim 1 fiber bitumen macadam seal coat method is characterized in that: the cloth that spills in described step (2)-(4) uses the Sai Gema distribution vehicle to spill cloth; The speed of a motor vehicle of described Sai Gema distribution vehicle is controlled at 3-4.5km/h, and the best speed of a motor vehicle is 3.6km/h.
3. a kind of according to claim 1 fiber bitumen macadam seal coat method is characterized in that: described step (6) rolls with the 26T pneumatic-tired rollers.
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