CN101768914A - Pavement structure for structure transfer and performance recovery of semi-rigid base asphalt pavement - Google Patents
Pavement structure for structure transfer and performance recovery of semi-rigid base asphalt pavement Download PDFInfo
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- CN101768914A CN101768914A CN201010100947A CN201010100947A CN101768914A CN 101768914 A CN101768914 A CN 101768914A CN 201010100947 A CN201010100947 A CN 201010100947A CN 201010100947 A CN201010100947 A CN 201010100947A CN 101768914 A CN101768914 A CN 101768914A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 130
- 238000011084 recovery Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 98
- 239000002344 surface layer Substances 0.000 claims abstract description 46
- 239000010410 layer Substances 0.000 claims abstract description 31
- 230000006378 damage Effects 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 26
- 238000005299 abrasion Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 64
- 239000011707 mineral Substances 0.000 claims description 64
- 235000010755 mineral Nutrition 0.000 claims description 64
- 238000003801 milling Methods 0.000 claims description 40
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 230000001804 emulsifying effect Effects 0.000 claims description 34
- 230000008929 regeneration Effects 0.000 claims description 29
- 238000011069 regeneration method Methods 0.000 claims description 29
- 235000019738 Limestone Nutrition 0.000 claims description 22
- 239000006028 limestone Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 239000000945 filler Substances 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 10
- 125000002091 cationic group Chemical group 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 230000007480 spreading Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000013011 mating Effects 0.000 claims description 6
- -1 press mass ratio Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 235000012255 calcium oxide Nutrition 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000000839 emulsion Substances 0.000 abstract 4
- 238000005336 cracking Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 9
- 238000013461 design Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a pavement structure for structure transfer and performance recovery of a semi-rigid base asphalt pavement, which is characterized in that a transferred-structural cold recycled semi-flexible base is on the non-damaged semi-rigid base of the original asphalt pavement; a modified asphalt emulsion slurry seal layer is coated on a cold recycled semi-flexible base; an asphalt pavement bottom layer is on the modified asphalt emulsion slurry seal layer; a modified asphalt emulsion bonding layer is on the asphalt pavement bottom layer; and a surface abrasion layer is on the modified asphalt emulsion bonding layer. The construction method comprises the following steps of: a) cleaning the semi-rigid base asphalt pavement; and b) carrying out the structure transfer and performance recovery of the pavement. The invention has the advantages that the structure transfer of the damaged semi-rigid base of the original asphalt pavement and the damaged surface layer is realized, and the performance of the pavement is recovered and improved, the repaired pavement had good high-temperature stability and less water damage, and the cracking of the base can be effectively prevented, stopped or slowed down; not only the original pavement material is fully used, but also the energy is saved, and the second pollution on the environment is prevented; and the service function of the original pavement is recovered or improved, and the service life of the pavement is prolonged.
Description
Technical field
The present invention relates to a kind of road structure, be specifically related to a kind of reconstruction or medium-capital overhauling engineering that is used for speedway, state's provincial trunk highway, form new road structure, relate in particular to a kind of road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery.
Background technology
From 1988, since China's article one speedway is open to the traffic, to the end of the year 2008, the speedway total kilometrage has surpassed 60,000 kilometers, and wherein the overwhelming majority is a flexible pavement, according to the design period in 8～15 years of flexible pavement, the highway that build the nineties in 20th century enters big or middle repairing the stage successively, yet, being far from reaching projected life the real application life of China's flexible pavement, generally just need overhaul in 3～5 years being open to traffic.What in addition, most basic units adopted in the road structure of China's speedway is semi-rigid type base.Semi-rigid type base has good globality, and the ability of bigger diffusion load is arranged.But the use of more than ten years shows that the flexible pavement ubiquity of making semi-rigid type base damages phenomenon in early days.A kind of early stage damage is to build up soon at flexible pavement, then or 2～3 years flexible pavements in various degree early stage damages such as rut, hole groove, check crack are just taken place.Another kind of type is that the design period that does not generally reach the pavement design requirement, (China's flexible pavement design period major part was 15 years, minority is 20 years), 7～8 years at most, perhaps just must carry out large repairs about 10 years, and this overhaul also must be keeped in repair basic unit even subbase simultaneously not only to the asphalt surface course maintenance.For a large amount of original ground surface material that in asphalt pavement maintenance and transformation process, is produced, be used as generally that rubbish is thrown aside or as filler, this extensive processing mode has not only taken the land resources of a large amount of preciousnesses, causes second environmental pollution; Simultaneously, but former ground surface material exists huge use value (residual value), it is thrown aside or demotes and handles the serious waste caused resource.Under the deficient day by day severe situation of raw material; original destruction ground surface material is carried out regeneration and original destruction road surface carried out Structure Conversion is of great immediate significance and economic implications; this not only can protect environment, saves resource, reduce construction costs; but also the defective that can correct original ground surface material; recover Pavement Performance; improve the durability on road surface, thereby prolong the application life on road surface.
Summary of the invention
The object of the present invention is to provide a kind of road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery, this road structure makes full use of former damaged ground surface material, making and damaging the semi-rigid type base Structure Conversion is cold regeneration half flexbile base, constitute combined type basic unit jointly with unspoiled semi-rigid type base, repave and build antiskid, wear-resisting hot-mix asphalt mixture surface layer, former damaged Pavement Performance is restored even improves, road surface high temperature stability performance after the reparation is good, the damage by water evil is few, can effectively prevent, stop or slow down base course crack, prolong service life of road surface.The present invention also provides a kind of job practices that is used for the road structure of semi-rigid asphalt pavement Structure Conversion and performance recovery simultaneously.
For achieving the above object, technical scheme of the present invention is:
A kind of road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery, described semi-rigid asphalt pavement is by protobitumen road surface semi-rigid type base, the protobitumen top course constitutes, in the semi-rigid type base of protobitumen road surface not broken parts be that semi-rigid type base is not damaged on the protobitumen road surface, in the semi-rigid type base of protobitumen road surface broken parts be that semi-rigid type base has been damaged on the protobitumen road surface, it is characterized in that: do not damage cold regeneration half flexbile base after being Structure Conversion on the semi-rigid type base on the protobitumen road surface, do not damage semi-rigid type base and cold regeneration half flexbile base and constitute combined type basic unit jointly; On cold regeneration half flexbile base is modified emulsified asphalt slurry seal, is surface layer under the flexible pavement on the modified emulsified asphalt slurry seal, is the modified emulsifying asphalt tack coat on the surface layer under the flexible pavement, is the surface abrasion layer on the modified emulsifying asphalt tack coat.
Preferably, not damage the thickness of semi-rigid type base be 0～16cm on described protobitumen road surface.If protobitumen road surface semi-rigid type base all damages, then remove protobitumen road surface semi-rigid type base fully, the one-tenth-value thickness 1/10 that semi-rigid type base is not damaged on the protobitumen road surface is zero.
Preferably, described cold regeneration half flexbile base is formed the milling material by following materials in weight portion mix: 100 parts; Newly gather materials: 0～30 part; Pitch: 2.5～3.5 parts; Inorganic binder: 0～2.0 part; Water: 7～14 parts; Described milling material by milling protobitumen road surface damaged the material that semi-rigid type base gets, the material that milling protobitumen top course gets is formed, the quality proportioning that milling protobitumen road surface has been damaged between the material that material that semi-rigid type base gets and milling protobitumen surface layer get is 100: 10～90; Described pitch is a kind of in mulseal or the foamed asphalt; The thickness of described cold regeneration half flexbile base is 18～24cm.If protobitumen road surface semi-rigid type base all damages, then remove protobitumen road surface semi-rigid type base fully, then all remove the material that protobitumen road surface semi-rigid type base gets, and the material that milling protobitumen top course gets is the milling material.
Further preferred, described mulseal for split slowly type or in split a kind of in the type mulseal; Described mulseal is a kind of in cationic, anionic or the nonionic; The quality solid content of described mulseal is 40～70%.
Further preferred, described foamed asphalt is to melt pitch and water mixes by 130～170 ℃ elevated temperature heat; Wherein, it is 96.5～98.5% by mass percentage that elevated temperature heat is melted pitch, and water accounts for 1.5～3.5% by mass percentage.
Further preferred, described inorganic binder is one or more in cement, flyash, the quicklime.
Preferably, described modified emulsified asphalt slurry seal forms mineral aggregate by following materials in weight portion mix: 100 parts; Mulseal: 14～18 parts; Wherein, mineral aggregate by gather materials and filler forms, gather materials and the packing quality ratio be 100: 10～12; Gathering materials is in limestone, basalt, the diabase one or more, and filler is the limestone breeze; The nominal maximum aggregate size of described mineral aggregate is 5cm; Described mulseal is the SBR modified emulsifying asphalt; The thickness of described modified emulsified asphalt slurry seal is 0.4～0.9cm.
Preferably, surface layer is middle grain formula bituminous concrete under the described flexible pavement, and surface layer is formed by mineral aggregate, pitch, fiber mix under the described flexible pavement, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.0～6.0: 0～0.5; Described mineral aggregate is by gathering materials and filler is formed, and the mass ratio that gathers materials with filler is 100: 15～30; Described gathering materials is in limestone, basalt, the diabase one or more; Described filler is the limestone breeze; The nominal maximum aggregate size of described mineral aggregate is 16mm; Described pitch is a kind of in heavy traffic paving asphalt or the modified bitumen; The thickness of surface layer is 4～6cm under the described flexible pavement.
Preferably, the material of described modified emulsifying asphalt tack coat is a modified emulsifying asphalt, modified emulsifying asphalt for split soon type or in split the type mulseal, the quality solid content is 40～70%, can be cationic, anionic or nonionic; The spreading amount of described modified emulsifying asphalt bonding layer material modified emulsifying asphalt is 0.3～0.6L/m
2
Preferably, described surface abrasion layer is a particulate formula bituminous concrete, and the surface abrasion layer is formed by mineral aggregate, pitch and fiber mix, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.0～6.0: 0～0.5; Described mineral aggregate is by gathering materials and filler is formed, and the mass ratio that gathers materials with filler is 100: 15～30; Described gathering materials is in limestone, basalt, the diabase one or more; Described filler is the limestone breeze; Described pitch is a kind of in heavy traffic paving asphalt or the modified bitumen; The nominal maximum aggregate size of described mineral aggregate is 13mm; The thickness of described surface abrasion layer is 3～5cm.
The above-mentioned job practices that is used for the road structure of semi-rigid asphalt pavement Structure Conversion and performance recovery is characterized in that may further comprise the steps:
A), the cleaning of semi-rigid asphalt pavement
Asphalt surface course milling in the former semi-rigid asphalt pavement is clean, as to have damaged in the semi-rigid type base of continuation milling protobitumen road surface semi-rigid type base, extremely the semi-rigid type base milling that has damaged is removed and is exposed and do not damage till the semi-rigid type base; If semi-rigid type base all damages, then the whole millings of whole semi-rigid type base are removed;
B), road structure conversion and performance recovery
Not damaging cold regeneration half flexbile base of mating formation on the semi-rigid type base, constitute combined type basic unit jointly; The modified emulsified asphalt slurry seal of on cold regeneration half flexbile base, mating formation; At making on the modified emulsified asphalt slurry seal surface layer under the flexible pavement is arranged; Spreading modified emulsifying asphalt tack coat on the surface layer under the flexible pavement; The surface abrasion that paves on modified emulsifying asphalt tack coat layer is finished the construction of semi-rigid asphalt pavement Structure Conversion and performance recovery.
The present invention is used for the road structure of semi-rigid asphalt pavement Structure Conversion and performance recovery and the beneficial effect of job practices is: 1) from former damaged flexible pavement semi-rigid type base to the combined type basic unit that does not damage semi-rigid type base and cold regeneration half flexbile base, from damaged surface layer to functional rehabilitation even the surface layer of raising, semi-rigid type base and the conversion of destruction surface layer implementation structure that the protobitumen road surface has been damaged, Pavement Performance is restored even improves, road surface high temperature stability performance after the reparation is good, the damage by water evil is few, can prevent, stops or slow down base course crack effectively; 2) but by cold regeneration the use value (residual value) of protobitumen ground surface material is fully used, and saved resource, prevented second environmental pollution; 3) cold regeneration half flexbile base after adopting modified emulsified asphalt slurry seal as Structure Conversion and the articulamentum of top course not only can prevent the infiltration of rainwater, effectively protect basic unit, expand to surface layer but also can stop or delay the base course reflection crack; 4) adopt the binding material of modified emulsifying asphalt, not only can play good cementation, and can stop the infiltration of rainwater, play the effect of surface layer under the protection flexible pavement as surface layer under the flexible pavement and surface abrasion layer; 5) based on above-mentioned advantage, road structure of the present invention recovers or has improved the function of use on protobitumen road surface, prolongs service life of road surface, has important economic benefit and social benefit.
Description of drawings
Fig. 1 is the structural representation on protobitumen road surface;
Fig. 2 is the structural representation on road surface of the present invention.
Among the figure, 1-protobitumen road surface semi-rigid type base; 2-protobitumen top course; Semi-rigid type base is not damaged on 3-protobitumen road surface; Semi-rigid type base has been damaged on 4-protobitumen road surface; Cold regeneration half flexbile base of 5-; The 6-modified emulsified asphalt slurry seal; Surface layer under the 7-flexible pavement; 8-modified emulsifying asphalt tack coat; 9-surface abrasion layer.
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment, but therefore do not limit the present invention among the described scope of embodiments.
Referring to Fig. 1, Fig. 2, a kind of road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery, described semi-rigid asphalt pavement is by protobitumen road surface semi-rigid type base 1, protobitumen top course 2 constitutes, in the protobitumen road surface semi-rigid type base 1 not broken parts be that semi-rigid type base 3 is not damaged on the protobitumen road surface, in the protobitumen road surface semi-rigid type base 1 broken parts be that semi-rigid type base 4 has been damaged on the protobitumen road surface, it is characterized in that: do not damage cold regeneration half flexbile base 5 after being Structure Conversion on the semi-rigid type base 3 on the protobitumen road surface, on cold regeneration half flexbile base 5 is modified emulsified asphalt slurry seal 6, it on the modified emulsified asphalt slurry seal 6 surface layer 7 under the flexible pavement, being modified emulsifying asphalt tack coat 8 on the surface layer 7 under the flexible pavement, is surface abrasion layer 9 on the modified emulsifying asphalt tack coat 8.
The thickness that semi-rigid type base 3 is not damaged on described protobitumen road surface is 5cm.
Described cold regeneration half flexbile base 5 is formed the milling material by following materials in weight portion mix: 100 parts; Newly gather materials: 13 parts; Pitch: 2.9 parts; Inorganic binder: 1.5 parts; Water: 10 parts; Described milling material by the protobitumen road surface damaged the material that semi-rigid type base 4 gets, the material that milling protobitumen surface layer 2 gets is formed, the quality proportioning that milling protobitumen road surface has been damaged between the material that material that semi-rigid type base 4 gets and milling protobitumen surface layer 2 get is 100: 30; Described pitch is for splitting cationic mulseal slowly, and its quality solid content is 52.9%; Described inorganic binder is a P.O42.5 cement; The thickness of described cold regeneration half flexbile base 5 is 22cm.
Described modified emulsified asphalt slurry seal 6 is mixed mineral aggregate by following materials in weight portion: 100 parts; Mulseal: 15 parts; Wherein, mineral aggregate is made up of basalt aggregate and limestone mineral powder filling materials, and its mass ratio is 100: 10; The nominal maximum aggregate size of described mineral aggregate is 5cm; Described mulseal is the SBR modified emulsifying asphalt; The thickness of described modified emulsified asphalt slurry seal is 0.6cm.
Surface layer 7 is middle grain formula bituminous concrete under the described flexible pavement, and surface layer 7 is formed by mineral aggregate, pitch, fiber mix under the described flexible pavement, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.4: 0.3; Described mineral aggregate is made up of limestone aggregates and limestone mineral powder filling materials, and its mass ratio is 100: 19; The nominal maximum aggregate size of described mineral aggregate is 16mm; Described pitch is the AH-70 heavy traffic paving asphalt; The thickness of surface layer 7 is 6cm under the described flexible pavement.
The material of described modified emulsifying asphalt tack coat 8 is for splitting cationic modified mulseal soon, and its quality solid content is 59.3%; The spreading amount of described modified emulsifying asphalt tack coat 8 material modification mulseals is 0.5L/m
2
Described surface abrasion layer 9 is a particulate formula bituminous concrete, and surface abrasion layer 9 is formed by mineral aggregate, pitch and fiber mix, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.8: 0.3; Described mineral aggregate is made up of basalt aggregate and limestone mineral powder filling materials, and its mass ratio is 100: 21; The nominal maximum aggregate size of described mineral aggregate is 13mm; Described pitch is the AH-70 heavy traffic paving asphalt; The thickness of described surface abrasion layer 9 is 5cm.
Referring to Fig. 2, be used for the job practices of the road structure of semi-rigid asphalt pavement Structure Conversion and performance recovery, may further comprise the steps:
The cleaning of a, semi-rigid asphalt pavement
2 millings of asphalt surface course in the former semi-rigid asphalt pavement are clean, as to have damaged in the semi-rigid type base of continuation milling protobitumen road surface semi-rigid type base 4, extremely semi-rigid type base 4 millings that damaged are removed and are exposed and do not damage till the semi-rigid type base 3;
B, road structure conversion and performance recovery
Not damaging cold regeneration half flexbile base 5 of mating formation on the semi-rigid type base 3, constitute combined type basic unit jointly; The modified emulsified asphalt slurry seal 6 of on cold regeneration half flexbile base 5, mating formation; At making on the modified emulsified asphalt slurry seal 6 surface layer 7 under the flexible pavement is arranged; Spreading modified emulsifying asphalt tack coat 8 on the surface layer 7 under the flexible pavement; The surface abrasion that paves on the modified emulsifying asphalt tack coat 8 layer 9 is finished the construction of semi-rigid asphalt pavement Structure Conversion and performance recovery.
Referring to Fig. 1, Fig. 2, a kind of road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery, its job practices is with embodiment 1.
The thickness that semi-rigid type base 3 is not damaged on described protobitumen road surface is 11cm.
Described cold regeneration half flexbile base 5 is formed the milling material by following materials in weight portion mix: 100 parts; Newly gather materials: 21 parts; Pitch: 3.1 parts; Inorganic binder: 2.0 parts; Water: 12 parts; Described milling material by the protobitumen road surface damaged the material that semi-rigid type base 4 gets, the material that milling protobitumen surface layer 2 gets is formed, the quality proportioning that milling protobitumen road surface has been damaged between the material that material that semi-rigid type base 4 gets and milling protobitumen surface layer 2 get is 100: 65; Described pitch is foamed asphalt, and it is to melt pitch and water mixes by 150 ℃ elevated temperature heat, and wherein, it is 97.5% by mass percentage that elevated temperature heat is melted pitch, and water accounts for 2.5% by mass percentage; Described inorganic binder is a P.O42.5 cement; The thickness of described cold regeneration half flexbile base 5 is 18cm.
Described modified emulsified asphalt slurry seal 6 is mixed mineral aggregate by following materials in weight portion: 100 parts; Mulseal: 16 parts; Wherein, mineral aggregate is gathered materials by diabase and the limestone mineral powder filling materials is formed, and its mass ratio is 100: 11; The nominal maximum aggregate size of described mineral aggregate is 5cm; Described mulseal is the SBR modified emulsifying asphalt; The thickness of described modified emulsified asphalt slurry seal is 0.7cm.
Surface layer 7 is middle grain formula bituminous concrete under the described flexible pavement, and surface layer 7 is formed by mineral aggregate, pitch, fiber mix under the described flexible pavement, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.5: 0.3; Described mineral aggregate is made up of basalt aggregate and limestone mineral powder filling materials, and its mass ratio is 100: 20; The nominal maximum aggregate size of described mineral aggregate is 16mm; Described pitch is the AH-70 heavy traffic paving asphalt; The thickness of surface layer 7 is 5cm under the described flexible pavement.
The material of described modified emulsifying asphalt tack coat 8 splits cationic modified mulseal in being, its quality solid content is 62.7%; The spreading amount of described modified emulsifying asphalt tack coat 8 material modification mulseals is 0.3L/m
2
Described surface abrasion layer 9 is a particulate formula bituminous concrete, and surface abrasion layer 9 is formed by mineral aggregate, pitch and fiber mix, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.8: 0.3; Described mineral aggregate is gathered materials by diabase and the limestone mineral powder filling materials is formed, and its mass ratio is 100: 24; The nominal maximum aggregate size of described mineral aggregate is 13mm; Described pitch is the SBS modified bitumen; The thickness of described surface abrasion layer 9 is 4cm.
This road structure makes full use of original asphalt pavement material, make the protobitumen road surface damage semi-rigid type base and the conversion of destruction surface layer implementation structure, Pavement Performance is restored even improves, road surface high temperature stability performance after the reparation is good, the damage by water evil is few, can prevent, stop or slow down base course crack effectively, prolong service life of road surface, brought huge economic benefit and social benefit for the road surface area of maintenance.
Referring to Fig. 1, Fig. 2, a kind of road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery, other are with embodiment 1.
Described protobitumen road surface semi-rigid type base 1 all damages.
Described cold regeneration half flexbile base 5 is formed the milling material by following materials in weight portion mix: 100 parts; Newly gather materials: 15 parts; Pitch: 2.8 parts; Inorganic binder: 1.7 parts; Water: 10 parts; The material that the material that described milling material is got by the whole semi-rigid type bases 1 in protobitumen road surface, milling protobitumen surface layer 2 get is formed, and the quality proportioning between the material that material that the whole semi-rigid type bases 1 in milling protobitumen road surface get and milling protobitumen surface layer 2 get is 100: 45; Described pitch is foamed asphalt, and it is to melt pitch and water mixes by 150 ℃ elevated temperature heat, and wherein, it is 97.8% by mass percentage that elevated temperature heat is melted pitch, and water accounts for 2.2% by mass percentage; Described inorganic binder is a P.O42.5 cement; The thickness of described cold regeneration half flexbile base 5 is 23cm.
Described modified emulsified asphalt slurry seal 6 is mixed mineral aggregate by following materials in weight portion: 100 parts; Mulseal: 17 parts; Wherein, mineral aggregate is gathered materials by diabase and the limestone mineral powder filling materials is formed, and its mass ratio is 100: 11; The nominal maximum aggregate size of described mineral aggregate is 5cm; Described mulseal is the SBR modified emulsifying asphalt; The thickness of described modified emulsified asphalt slurry seal is 0.8cm.
Surface layer 7 is middle grain formula bituminous concrete under the described flexible pavement, and surface layer 7 is formed by mineral aggregate, pitch, fiber mix under the described flexible pavement, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.6: 0.3; Described mineral aggregate is made up of basalt aggregate and limestone mineral powder filling materials, and its mass ratio is 100: 22; The nominal maximum aggregate size of described mineral aggregate is 16mm; Described pitch is the AH-70 heavy traffic paving asphalt; The thickness of surface layer 7 is 5cm under the described flexible pavement.
The material of described modified emulsifying asphalt tack coat 8 splits cationic modified mulseal in being, its quality solid content is 60.7%; The spreading amount of described modified emulsifying asphalt tack coat 8 material modification mulseals is 0.4L/m
2
Described surface abrasion layer 9 is a particulate formula bituminous concrete, and surface abrasion layer 9 is formed by mineral aggregate, pitch and fiber mix, presses mass ratio, mineral aggregate: pitch: fiber=100: 4.9: 0.3; Described mineral aggregate is gathered materials by diabase and the limestone mineral powder filling materials is formed, and its mass ratio is 100: 20; The nominal maximum aggregate size of described mineral aggregate is 13mm; Described pitch is the SBS modified bitumen; The thickness of described surface abrasion layer 9 is 4cm.
Claims (11)
1. road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery, described semi-rigid asphalt pavement is by protobitumen road surface semi-rigid type base (1), protobitumen top course (2) constitutes, in the protobitumen road surface semi-rigid type base (1) not broken parts be that semi-rigid type base (3) is not damaged on the protobitumen road surface, in the protobitumen road surface semi-rigid type base (1) broken parts be that semi-rigid type base (4) has been damaged on the protobitumen road surface, it is characterized in that: do not damage semi-rigid type base (3) on the protobitumen road surface and upward be cold regeneration half flexbile base (5) after the Structure Conversion, cold regeneration half flexbile base (5) is gone up and is modified emulsified asphalt slurry seal (6), modified emulsified asphalt slurry seal (6) is gone up and is surface layer (7) under the flexible pavement, surface layer under the flexible pavement (7) is gone up and is that it is surface abrasion layer (9) that modified emulsifying asphalt tack coat (8), modified emulsifying asphalt tack coat (8) are gone up.
2. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 1 is characterized in that: the thickness that semi-rigid type base (3) is not damaged on described protobitumen road surface is 0～16cm.
3. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 1 is characterized in that: described cold regeneration half flexbile base (5) is formed by following materials in weight portion mix, the milling material: 100 parts; Newly gather materials: 0～30 part; Pitch: 2.5～3.5 parts; Inorganic binder: 0～2.0 part; Water: 7～14 parts; Described milling material by milling protobitumen road surface damaged the material that semi-rigid type base (4) gets, the material that milling protobitumen surface layer (2) gets is formed, the quality proportioning that milling protobitumen road surface has been damaged between the material that material that semi-rigid type base (4) gets and milling protobitumen surface layer (2) get is 100: 10～90; Described pitch is one or both in mulseal or the foamed asphalt; The thickness of described cold regeneration half flexbile base (5) is 18～24cm.
4. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 3 is characterized in that: described mulseal for split slowly type or in split a kind of in the type mulseal; Described mulseal is a kind of in cationic, anionic or the nonionic; The quality solid content of described mulseal is 40～70%.
5. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 3 is characterized in that: described foamed asphalt is to melt pitch and water mixes by 130～170 ℃ elevated temperature heat; Wherein, it is 96.5～98.5% by mass percentage that elevated temperature heat is melted pitch, and water accounts for 1.5～3.5% by mass percentage.
6. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 3 is characterized in that: described inorganic binder is one or more in cement, flyash, the quicklime.
7. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 1 is characterized in that: described modified emulsified asphalt slurry seal (6) forms mineral aggregate by following materials in weight portion mix: 100 parts; Mulseal: 14～18 parts; Wherein, mineral aggregate by gather materials and filler forms, gather materials and the packing quality ratio be 100: 10～12; Gathering materials is in limestone, basalt, the diabase one or more, and filler is the limestone breeze; The nominal maximum aggregate size of described mineral aggregate is that the described mulseal of 5cm is the SBR modified emulsifying asphalt; The thickness of described modified emulsified asphalt slurry seal (6) is 0.4～0.9cm.
8. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 1, it is characterized in that: surface layer under the described flexible pavement (7) is middle grain formula bituminous concrete, surface layer under the described flexible pavement (7) is formed by mineral aggregate, pitch, fiber mix, press mass ratio, mineral aggregate: pitch: fiber=100: 4.0～6.0: 0～0.5; Described mineral aggregate is by gathering materials and filler is formed, and the mass ratio that gathers materials with filler is 100: 15～30; Described gathering materials is in limestone, basalt, the diabase one or more; Described filler is the limestone breeze; The nominal maximum aggregate size of described mineral aggregate is 16mm; Described pitch is a kind of in heavy traffic paving asphalt or the modified bitumen; The thickness of surface layer under the described flexible pavement (7) is 4～6cm.。
9. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 1, it is characterized in that: the material of described modified emulsifying asphalt tack coat (8) is a modified emulsifying asphalt, modified emulsifying asphalt for split soon type or in split the type mulseal, the quality solid content is 40～70%, can be cationic, anionic or nonionic; The spreading amount of described modified emulsifying asphalt tack coat (8) material modification mulseal is 0.3～0.6L/m
2
10. the road structure that is used for semi-rigid asphalt pavement Structure Conversion and performance recovery according to claim 1, it is characterized in that: described surface abrasion layer (9) is a particulate formula bituminous concrete, surface abrasion layer (8) is formed by mineral aggregate, pitch and fiber mix, press mass ratio, mineral aggregate: pitch: fiber=100: 4.0～6.0: 0～0.5; Described mineral aggregate is by gathering materials and filler is formed, and the mass ratio that gathers materials with filler is 100: 15～30; Described gathering materials is in limestone, basalt, the diabase one or more; Described filler is the limestone breeze; Described pitch is a kind of in heavy traffic paving asphalt or the modified bitumen; The nominal maximum aggregate size of described mineral aggregate is 13mm; The thickness of described surface abrasion layer (8) is 3～5cm.
11. the described job practices that is used for the road structure of semi-rigid asphalt pavement Structure Conversion and performance recovery of claim 1 is characterized in that may further comprise the steps:
A), the cleaning of semi-rigid asphalt pavement
Asphalt surface course in the former semi-rigid asphalt pavement (2) milling is clean, the semi-rigid type base (4) that has damaged in the continuation milling protobitumen road surface semi-rigid type base (1), extremely semi-rigid type base (4) milling that has damaged is removed and is exposed and do not damage till the semi-rigid type base (3); If semi-rigid type base (1) all damages, then all milling removings of whole semi-rigid type base (1);
B), road structure conversion and performance recovery
Not damaging cold regeneration half flexbile base (5) of mating formation on the semi-rigid type base (3), constitute combined type basic unit jointly; The modified emulsified asphalt slurry seal (6) of on cold regeneration half flexbile base (5), mating formation; Go up making at modified emulsified asphalt slurry seal (6) surface layer under the flexible pavement (7) is arranged; Surface layer under the flexible pavement (7) is gone up spreading modified emulsifying asphalt tack coat (8); The surface abrasion layer (9) that paves on the modified emulsifying asphalt tack coat (8) is finished the construction of semi-rigid asphalt pavement Structure Conversion and performance recovery.
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| CN2010101009471A CN101768914B (en) | 2010-01-25 | 2010-01-25 | Pavement structure for structure transfer and performance recovery of semi-rigid base asphalt pavement |
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| CN102051848A (en) * | 2010-12-16 | 2011-05-11 | 河南省新开元路桥工程咨询有限公司 | HMA/CC (Hot-Mix Asphalt)/(Cement Concrete) composite type pavement structure and constructing method thereof |
| CN102787547A (en) * | 2012-08-22 | 2012-11-21 | 李凤云 | Designing and constructing method for semi-rigid base asphalt pavement |
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| CN105347746A (en) * | 2015-12-03 | 2016-02-24 | 苏交科集团股份有限公司 | Foamed asphalt cold-recycling lime-fly-ash crush stone mixture and preparation method thereof |
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| CN107386038A (en) * | 2017-06-12 | 2017-11-24 | 东南大学 | A kind of foamed asphalt cold renewal structure sheaf compound and its construction method |
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| CN102051848A (en) * | 2010-12-16 | 2011-05-11 | 河南省新开元路桥工程咨询有限公司 | HMA/CC (Hot-Mix Asphalt)/(Cement Concrete) composite type pavement structure and constructing method thereof |
| CN102787547A (en) * | 2012-08-22 | 2012-11-21 | 李凤云 | Designing and constructing method for semi-rigid base asphalt pavement |
| CN102787547B (en) * | 2012-08-22 | 2015-02-04 | 李凤云 | Designing and constructing method for semi-rigid base asphalt pavement |
| CN102877389A (en) * | 2012-10-16 | 2013-01-16 | 长安大学 | Asphalt pavement paving method |
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| CN105347746A (en) * | 2015-12-03 | 2016-02-24 | 苏交科集团股份有限公司 | Foamed asphalt cold-recycling lime-fly-ash crush stone mixture and preparation method thereof |
| CN107386038A (en) * | 2017-06-12 | 2017-11-24 | 东南大学 | A kind of foamed asphalt cold renewal structure sheaf compound and its construction method |
| CN107059615A (en) * | 2017-06-27 | 2017-08-18 | 上海市市政规划设计研究院 | Permanent seal cooling Bridge Surface Paving by Cement structure |
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