Is road surface flatness poor? Road surface wave? Does road surface receive stubble does rough, inattentive, road surface have round of mark? Bag of road surface stop up, washboard? How does the quality common fault with these bitumen compound common road surface prevent and cure? Accordingly small make up look together!
1, road surface flatness is poor
Phenomenon:
Bitumen compound spreads out shop, cuddle is made the same score artificially, grind the surface after pressing still relatively level off,
Case study:
(1) rock-bottom flatness is poor, because compound of of all kinds bitumen has its certain squeezing ramming coefficient, after booth is spread, exterior cuddle was made the same score, because base is rugged, and empty shop ply has enjoy some thick, grind after pressing, small part sedimentations little, taller, be in after sedimentation much, inferior, exterior flatness is poor.
(2) booth shop method is undeserved, in waiting for thick empty lay up, because spread out iron is used when the shop,cast high, or the wallop when carriage discharge breaks bitumen compound solid, or person, car steps on random make friends in disorder on empty shop compound, after that cuddle is smooth, cause the actual condition abhorrent, empty place is inferior, real point is higher, flatness is poorer.
(3) makings bottom is cleared sordid, discharge of direct use up all one's resources is in bitumen compound on ground floor, felt keeps clear of by the makings on base grass-roots unit sordid, or spread out the surplus material that day on ground floor at random, act as to spread out the shop expects partly, but it already squeezing ramming, condensation, narrowed greatly squeezing ramming coefficient, when virgin material compensatory cuddle makes the same score squeezing ramming hind, form local tall dash forward, bumpy, rough whole.
Harm:
(1) the main use function that road surface flatness is civil engineer. If road is not even, can reduce driving speed, increase jolt of drive a vehicle, increase wallop, attaint car parts, reduce comfortable sex, reduce security, reduce economic benefits and social benefit.
(2) road surface heals rough calm, car wallop heals big, to viatic attaint heals serious, can reduce the investment benefit that civil engineer builds greatly.
Measure of prevention and cure:
(1) should solve rock-bottom flatness problem above all, the ground floor that indicates here is generally refer to. If bitumen compound facing divides a shop, so the ground floor of exterior layer is medium facing, the ground floor of facing is ground layer in, the ground floor of ground layer is viatic basic level, the ground floor of basic level is viatic roadbed, each flatness is met a flatness is crucial. Want so according to face of the satisfy the need in quality inspection assess each demand is controlled strictly, examine seriously. Go up in the foundation that makes sure each packing and freely break tall Cheng especially, raise flatness the standard undertakes controlling, final ability assures the high quality of the flatness of exterior layer.
(2) the booth shop of facing should use booth shop machine, put follow datum line of tall Cheng of every two side, the obligate that operates a hand to control very very hot flat is mixed high stability; When small area or machine of shop of termless use booth, want the methodological booth shop that sets strictly according to operating rules, use the method that buckle a shovel namely, forbid Yang Qiao, want shovel shovel jackknife, the requirement when buckling a shovel is blown backward slightly with spade, agree in order to make equably, when use barrow and fork-lift truck carry expect, the booth after application heats up a shovel to will expect the bottom breaks real share to turn over a pine is smooth, in an attempt to everywhere false or true is consistent. Cuddle makes the same score working procedure, cannot in trample the empty lay up without squeezing ramming, want retrograde cuddle to be made the same score survive, if reappearance has wrong place, can have special grow to make the same score cuddle of scraper make up a deficiency.
(3) bitumen compound should discharge is on iron plate, cannot tilt to build ground floor to go up in the shop directly. If want discharge to be on base grass-roots unit, must try to keep clear of clean. The rest cold makings cannot be spread directly build appropriative on base grass-roots unit one part layer is thick, should heat to do it additionally to use.
2, road surface wave
Phenomenon:
Arch is not full, local line of center of high point deviate, or in road surface fore-and-aft occurrence wave, build close curbstone especially slant wave of channel place occurrence roadside is more, make curbstone appears abhorrent.
Case study:
Basically be road surface the freely section tall programmed control of each structure layer makes not do one's best, or in two-phase adjacent reference point the distance slants big, appear in two tall Cheng bigger error, form reference point to be in prep above or under the road surface tall Cheng between two reference point.
Harm:
(1) influence exterior quality, road look is not whole.
(2) road surface wave, cause drive a vehicle to bump, reduce speed and the intimacy that take a car. Road surface wave causes seeper.
Measure of prevention and cure:
(1) road bed and road surface basic level apply wireless at 5 o'clock law to check tall Cheng of control freely section.
(2) the empty that wants each to control facing of good pitch compound spreads ply. Spread out the shop wants to use the method that puts smooth brick artificially.
(3) should impose detailed control particularly the roadside tall Cheng between two rainwater mouth, do not under downstream rainwater mouth around tall Cheng.
3, road surface receives stubble rough, inattentive, road surface has round of mark
Phenomenon:
(1) use booth spreads machine booth or artificial booth is spread, two between fore-and-aft receive stubble rough, appear to be differred high, or appear to drop broken bits phenomenon loose in the place that receive stubble.
(2) what twice booth spreads is transverse receive stubble rough, have jump car.
(3) oil path face and curbstone receive stubble or with other building the place that receive stubble stays have round of mark.
Case study:
(1) fore-and-aft receive stubble rough, because ply of two empty shop is abhorrent,be, create tall difference, 2 be two between all belong to every brim, oil reservoir relatively empty, after be being pressed via grinding, disloyal, appear to give channel appearance loose.
(2) it is no matter heat or cold those who receive is transverse receive stubble, because empty spreads the deviation of ply and muller to build the booth of termination to squeeze exercise to be received very hard in the shop,also be smooth.
(3) oil path face and curbstone or build content to accept stubble position with other, muller was not ground by the side of towel pressure, did not use tamp of mound hammer iron again, deficient oily part not seasonable make up a deficiency, cause brim place to fight depression rough and inattentive drop broken bits, or leave round of mark.
Harm:
(1) fore-and-aft receive stubble rough, inattentive and disloyal, via corrode of dip of snow of wheel concussion, rain, give hole attaint easily.
(2) transverse receive stubble rough, have jump car, pound road surface easy attaint.
(3) brim place is disloyal, pluvial slush easy infiltration, via immersing He Dongchun freezes be in harmony, roadside can be increased deepen attaint face, basic level of pluvial slush easy infiltration and roadbed, can reduce its intensity and stability.
Measure of prevention and cure:
(1) freely to receive stubble to all need do one's best to make booth spreads ply of false or true to agree twice, if be in,grind press discovery rough or have go up oil or deficient oily phenomenon, answer to use artificial complement or nap instantly, cold receive stubble to still need dig to establish stubble, brush edge oil, after using hot iron to receive stubble iron to rectify, be in squeezing ramming.
(2) mix to curbstone root ministry build content to receive stubble, muller controls the position that be less than, want to person specially assigned for a task has make level, with hot mound hammer and hot iron, tamper bake in a pan is close-grained, eliminate round of mark at the same time.
4, bag of road surface stop up, washboard
Phenomenon:
Bitumen compound facing happens embrace move, some fashions stop up package, its height is small 1-3cm, big 10cm is controlled, some forms wave, some forms washboard.
Case study:
(1) compound itself contains bitumen to still had been measured big. Or because carry is oily distance is excessively long-distance, oily cent learns form sediment, cause local oil to had been measured big, or the amount of oil sticking a layer that spills cloth on base grass-roots unit is too large, when air temperature is elevatory, in sticking an oily extensive to bitumen compound, come. Afore-mentioned a variety of it is to make be put in bitumen compound have " of more " free bitumen, make the lubricant in compound, make embrace push oily bag, wave.
(2) facing and grass-roots unit are local union is bad, it is when air temperature is higher, via action of drive a vehicle, generation arranges elbow of the side outside direction of drive a vehicle or tortuous path, create stop up package.
(3) exterior punish spreads law construction with the layer, asperse oil not all, bitumen amount is too large, or when half lawful construction, in spreading out thin volume expects when the shop, local oil amount is too large. When road arch when big or flatness is poor, compound of burning hot and seasonal bitumen can build up to small part, fashion stop up package.
(4) processing extensive oil is undeserved, conserve mine makings is meticulous, bestrew all does not fashion stop up package.
(5) bitumen compound grading is owed reasonable, thin volume is much, embed crowded ability low, high temperature stability is poor; Or shop of the booth when construction is rough, roller was not ground by operating rules pressure, or basic level is rough have wave, the shop builds facing to differ thick, all form washboard.
(6) earthy radical is rough whole, or record of surface of basic level of ground of powdery arenaceous lime is bad, if slant dry, remove a skin, after the shop constructs road surface have transport service, all cause wave.
(7) stability of basic level water is bad, squeezing ramming is insufficient, intensity is inhomogenous, make road surface happening is out of shape generation wave.
Harm:
(1) the flatness that destroyed road surface, reduced parts of car of the comfortable sex of road surface drive a vehicle, security, injury.
(2) as a result of rough calm sex, increased the wallop that the car carries, more the destruction of meeting aggravate road surface.
Measure of prevention and cure:
(1) bitumen compound enters the arena should make visual examination, if oil content crosses big phenomenon, should not spread out shop, to oily cent precipitation part should keep clear of.
(2) spread bitumen rock bits to be being added on old road surface, fill of clastic rock sticking a layer is entered, different ply controls the clastic rock that should set by the standard to be measured with oil.
(3) the ridge of oily caboodle oil that when bitumen asperses cloth car to jockey, forms with the reason place of other should keep clear of.
(4) bitumen compound should use softening point not the petroleum pitch under 45 ℃ .
(5) to road surface stop up the bag uses following punish methods:
1) belong to basic level reason to cause, more serious stop up is wrapped, handle basic level first with law of mend by replacing a damaged part, doing facing next.
2) the more serious stop up bag that causes by facing, it is when air temperature is higher, with heater eradicate after roast hair is soft, after that smooth-going of make up a deficiency, bake in a pan of the iron after tamp is smooth.
3) slight stop up bag, already hasten is stable, can shovel directly when high temperature smooth.
(6) the processing technique of wave of face of satisfy the need is:
1) like basic level intensity is not worth or stability is differred, should dig sit except facing fill strong hind, in filling facing.
2) if facing is mixed,is interlining among basic level, should bite off facing, keep clear of not to stabilize interlining, in mingle facing makings relevant data, fry facing is spread afresh after mixing.
3) the facing wave of small area, can be inside trough fill bitumen compound, make level punish. Rise and fall bigger person, eradicate wave crest part to undertake weighing spreading.
(7) after stop, traffic light, curved way of smaller part way jockey on a section of a highway of gearshift of the drive a vehicle that start, want to choose the bitumen compound with good thermal stability, if ground layer is chosen,interrupt grading, gap is big, the bitumen clastic rock with lock strong capability embeds between grain: Facing chooses form of the bead in the thick grading that wide market expects in; Exterior layer chooses successive grading, the bitumen rock bits with rock bits much dosage.
