CN101591881B - Pavement maintained by adopting cold regeneration technology and construction method thereof - Google Patents
Pavement maintained by adopting cold regeneration technology and construction method thereof Download PDFInfo
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- CN101591881B CN101591881B CN2009100686890A CN200910068689A CN101591881B CN 101591881 B CN101591881 B CN 101591881B CN 2009100686890 A CN2009100686890 A CN 2009100686890A CN 200910068689 A CN200910068689 A CN 200910068689A CN 101591881 B CN101591881 B CN 101591881B
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Abstract
The invention relates to pavement maintained by adopting cold regeneration technology, which comprises the following innovation that: the pavement from a milled basement to the surface is provided with a foamed asphalt cold regeneration layer, a modified asphalt hot mixed macadam stress absorbing layer and a single-layer modified asphalt concrete overlay in turn. Diseases caused by a semi-rigid base are prevented by changing a pavement structure, and the service life of a road is prolonged. The invention also relates to a construction process for the pavement maintained by adopting the cold regeneration technology, which mainly comprises the following steps: milling on-site pavement, adjusting gradation, preparing a foamed asphalt cold regeneration mixture, paving on-site, rolling, distributing the stress absorbing layer, and paving the single-layer modified asphalt concrete overlay. The pavement and the method adopt the foamed asphalt cold regeneration technology, thereby realizing recycling an asphalt surface course recycling material and a cement stabilized base recycling material, solving the pollution problem caused by a great amount of discarded pavement materials, saving resources, reducing economic investment, and having good economic benefit, social benefit, environmental benefit and promotion and application value.
Description
Technical field
The invention belongs to the road maintenance construction field, particularly a kind of road surface and job practices thereof that adopts cold regeneration techniques maintenance.
Background technology
At present, the high-grade highway of China more than 90% all adopts semi-rigid material (cement, lime, flyash binder stable granulate etc.) as flexible pavement basic unit or subbase when building.That is to say that semi-rigid asphalt pavement has become the major structural types of China Higher level asphalt highway.It is strong to it has been generally acknowledged that semi-rigid type base has a plate body, the advantage that bearing capacity is high, but semi-rigid type base is in case destroy, and its consequence that causes is comparatively serious often.And along with the prolongation of highway operating period, the high-grade highway of China has entered the maintenance phase in a large number.And traditional method for maintaining all is " belly breaking " formula, and the road structure of breakage is all dug plane, heavily spreads with new material then.So not only long in time limit, cost is high, and the predicament that brings a large amount of waste materials to handle, serious environment pollution.Therefore, how can give full play to " surplus value " of old asphalt mixture, promote the recycling of old pavement material; preserve the ecological environment; reducing the wasting of resources, simultaneously Semi-Rigid Pavement Structure is transferred to half flexible structure, is a difficult problem anxious to be captured in the HIGHWAY MAINTENANCE construction.
Summary of the invention
The object of the present invention is to provide a kind of road surface and job practices thereof that adopts cold regeneration techniques maintenance, it adopts foamed asphalt recycling technology that the old pavement material is carried out regeneration, and generate half flexbile base, and can reach the minimizing wasting of resources, prolong the highway purpose in application life simultaneously.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of road surface of adopting cold regeneration techniques maintenance, it is characterized in that: the road surface is followed successively by from the bottom land after the milling to surface: the cold regeneration zone of foamed asphalt, modified bitumen heat are mixed rubble stress absorbing layer and individual layer modified asphalt concrete cover.
And the constituent and the ratio of weight and number of the cold regeneration zone of described foamed asphalt are:
80～100 parts of reclaimed materials;
2～3 parts of pitches;
1～2 part of cement;
4～10 parts in water,
Above-mentioned each material mix the back the cold regeneration zone of foamed asphalt.
And the cold regeneration zone of described foamed asphalt comprises the fine aggregate that is not more than 20 weight portions.
And described reclaimed materials is asphalt surface course reclaimed materials or cement stabilized base course reclaimed materials.
The job practices on the cold regeneration techniques maintenance of a kind of employing as claimed in claim 1 road surface is characterized in that: may further comprise the steps:
(1) on-the-spot road-surface milling obtains reclaimed materials;
(2) grating to reclaimed materials is optimized adjustment, reclaimed materials is mixed the cold regeneration blended stock of preparation foamed asphalt by grating with pitch, cement, water;
(3) the cold regeneration blended stock of foamed asphalt is carried out the scene and pave, roll, form the cold regeneration zone of foamed asphalt, the cold regeneration zone of this foamed asphalt is 1～2 layer;
(4) on the cold regeneration zone of foamed asphalt, spill cloth modified bitumen heat and mix the rubble stress absorbing layer;
(5) mix making individual layer modified asphalt concrete cover on the rubble stress absorbing layer in modified bitumen heat, can finish the construction of pavement maintenance.
And in the described step (2), the ratio of weight and number of reclaimed materials in cold each material of regeneration blended stock of formation foamed asphalt and pitch, cement, water is:
80～100 parts of reclaimed materials;
2～3 parts of pitches;
1～2 part of cement;
4～10 parts in water.
And described reclaimed materials is the asphalt surface course reclaimed materials, with the grading limit of the cold regeneration blended stock of foamed asphalt of asphalt surface course reclaimed materials preparation is:
And described reclaimed materials is the cement stabilized base course reclaimed materials, with the grading limit of the cold regeneration blended stock of foamed asphalt of cement stabilized base course reclaimed materials preparation is:
And the cold regeneration blended stock of described foamed asphalt also comprises the fine aggregate that is not more than 20 weight portions.
And described modified bitumen heat is mixed the rubble stress absorbing layer and is mixed rubble by SBS modified bitumen and heat and constitute, and wherein SBS modified bitumen sprinkling amount is 1.8～2.2kg/m
2, heat is mixed rubble, and to spill the cloth rate be 50%～60%.
Advantage of the present invention and beneficial effect are:
1. this adopts the road surface of cold regeneration techniques maintenance, making individual layer modified asphalt concrete cover on the cold regeneration zone of foamed asphalt, and modified bitumen heat is set mixes the rubble stress absorbing layer at the above-mentioned cloth that spills between the two, to guarantee the interlayer combination, formed novel road structure form, avoid because the disease that semi-rigid type base causes, prolonged the application life of road, adopt individual layer modified asphalt concrete cover among the present invention, for the two-layer skin coat in the existing engineering, can save fund.
2. this adopts the road surface of cold regeneration techniques maintenance, the performance of the cold regeneration zone of foamed asphalt is between hot asphalt blended stock and semi-rigid material, belong to a kind of half flexible material, the cleavage strength scope can be used as the basic unit or the following surface layer of high-grade highway between 0.41～0.64MPa.
3. this adopts the road surface of cold regeneration techniques maintenance, and the cold regeneration blended stock of its foamed asphalt is in trial stretch, and unconfined compression strength value (UCS) is between 2.3～4.5MPa; The compression rebound modulu scope of the cold regeneration blended stock of foamed asphalt of bituminous surface layer reclaimed materials is 900～1300MPa, the compression rebound modulu scope that contains the cold regeneration blended stock of foamed asphalt of cement stabilized base reclaimed materials is 800～1400MPa, with the hot asphalt blended stock (compression rebound modulu be 1200～1600MPa) with semi-rigid material (compression rebound modulu is 1300～1700MPa) to compare, and the cold regeneration blended stock of foamed asphalt has less compression rebound modulu.
4. this adopts the job practices on cold regeneration techniques maintenance road surface, at the thicker characteristics of asphalt surface course reclaimed materials (RAP) grating, engineering design grading limit to the foamed asphalt cold regeneration mix that comprises the asphalt surface course reclaimed materials is optimized, reduced the fine aggregate consumption, especially the consumption of powder has novelty.
5. this adopts the job practices on cold regeneration techniques maintenance road surface, at the traditional cement stabilized base course structure of China, proposed to comprise the engineering design grading limit and the technical requirement on design of the foamed asphalt cold regeneration mix of cement stabilized base course reclaimed materials (CTB) first, had pioneering.
6. this adopts the job practices on cold regeneration techniques maintenance road surface to adopt foamed asphalt recycling technology, asphalt surface course reclaimed materials and the cement stabilized base course reclaimed materials that reclaims carried out regeneration, form half flexbile base, compare with traditional semi-rigid type base maintenance program, this job practices can be saved construction investment 9.2%, and direct economic benefit is obvious.If under the more intact situation of basic unit, only to asphalt surface course processings of regenerating, economic benefit is more obvious, can save and invest 15～20%.
7. this adopts the job practices on cold regeneration techniques maintenance road surface fully to reclaim asphalt pavement material and cement stabilizing substrate material, solve flexible pavement and overhauled a large amount of waste material environmental pollution problems that produce, the environment of protection human survival meets the requirement of changing waste into resources in the strategy of sustainable development of China; Owing to saved investment, reduced construction costs, make the old asphalt pavement that some originally can not on-call maintenance be able to timely reparation, thereby the road improvement situation improve road transport capacity, reduces contingent traffic accident, guarantees the comfortable safety of driving.
8. this adopts in the job practices on cold regeneration techniques maintenance road surface foamed asphalt regeneration blended stock to compare with the hot asphalt blended stock, bitumen content is low, do not need to heat to gathering materials, saved the energy greatly, the dust discharge problem that does not also have hot aggregates, also do not need a large amount of pitches are heated and are incubated, and cold conditions mixing and stirring the problem of no bitumen flue gas discharging, is zero polluting truly.
9. this adopts the job practices on cold regeneration techniques maintenance road surface to adopt foamed asphalt recycling technology, asphalt surface course reclaimed materials and the cement stabilized base course reclaimed materials that reclaims carried out regeneration, form half flexbile base, realize the materials recycling utilization thus, solve the pollution problem that causes after a large amount of ground surface materials are discarded, thereby save resource, the economic input of minimizing; Simultaneously, change road structure by this job practices, avoided because the disease that causes of semi-rigid type base, prolonged the application life of road, therefore this job practices can produce good economic benefit, social benefit and environmental benefit, has highly application value.
Description of drawings
Fig. 1 is the structural representation that the present invention adopts the road surface of cold regeneration techniques maintenance.
The specific embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of road surface of adopting the maintenance of cold regeneration techniques, the road surface is from 4 being followed successively by to the surface at the bottom of the milling pit: the cold regeneration zone 3 of foamed asphalt, modified bitumen heat are mixed rubble stress absorbing layer 2 and individual layer modified asphalt concrete cover 1.
Wherein, the constituent of the cold regeneration zone of foamed asphalt and ratio of weight and number are:
80～100 parts of reclaimed materials;
2～3 parts of pitches;
1～2 part of cement;
4～10 parts in water,
Above-mentioned each mixing of materials evenly the back the cold regeneration zone of foamed asphalt.
Also comprise the fine aggregate that is not more than 20 weight portions at the cold regeneration zone of foamed asphalt.
Reclaimed materials is asphalt surface course reclaimed materials or cement stabilized base course reclaimed materials.
A kind of job practices on cold regeneration techniques maintenance road surface that adopts is specially:
Embodiment 1
With long 1km, the road surface of wide 3.75m, handling thickness is that 18cm is an example, adopts the step of cold regeneration techniques maintenance pavement construction method to be:
(1) the original damaged pavement asphalt surface layer of on-the-spot milling obtains RAP (being the asphalt surface course reclaimed materials).
(2) grating to RAP is optimized adjustment, adopt the cold method of reproduction of plantmix to prepare the cold regeneration blended stock of foamed asphalt, be specially: transport RAP back cold regeneration batching plant, and RAP, pitch, cement, hydromining are mixed and stirred with the cold reclaim equiment of plantmix, the weight of each material is respectively:
RAP 1485t；
Pitch 34.2t;
Cement 22.3t;
Water 83.2t,
After stirring, promptly make the cold regeneration blended stock of foamed asphalt.
Grading limit according to the cold regeneration blended stock of foamed asphalt of RAP preparation is:
| Screen size (mm) | 37.5 | 31.5 | 26.5 | 19 | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Weight percent (%) | 100 | 97.9 | 97.4 | 94.3 | 89.8 | 86.5 | 77.6 | 60.8 | 42.2 | 26.2 | 17.0 | 10.0 | 6.3 | 5.0 |
In this step, the preferred Binzhou of described pitch A-70 pitch, best foaming condition is: 160 ℃ of blowing temperatures, foaming water supply volume 2.0%, 25 times of expansion rates, half-life 24s; Described cement is Portland cement, and grade is 32.5.
For making the cold regeneration blended stock of the foamed asphalt that makes have good intensity and water stability, temperature should not be lower than 15 ℃ in the work progress.
(3) the cold regeneration blended stock of foamed asphalt is transported to carries out the scene behind the job site and pave, the dry bottom land of reply is sprinkled water moisteningly before paving, and the back on-site rolling that paves forms the cold regeneration zone of foamed asphalt.
(4) on the cold regeneration zone of foamed asphalt, spill cloth modified bitumen heat and mix the rubble stress absorbing layer, to guarantee the bond strength between cold regeneration zone of foamed asphalt and the modified asphalt concrete skin coat, this modified bitumen and heat are mixed the rubble stress absorbing layer and are mixed rubble by SBS modified bitumen and heat and constitute, and the sprinkling amount of SBS modified bitumen is 1.8kg/m
2, heat is mixed rubble, and to spill the cloth rate be 50%.
(5) mix making individual layer modified asphalt concrete (AC-13C) skin coat on the rubble stress absorbing layer in modified bitumen heat.
The cold regeneration zone of foamed asphalt after the moulding is carried out the 48-72h health, and open to traffic again guarantees the stability at road surface initial stage after maintenance.
With long 1km, wide 3.75m road surface, handling thickness is that 20cm is an example, adopts the step of the job practices on cold regeneration techniques maintenance road surface to be:
(1) the original damaged cement stabilized base course of on-the-spot milling obtains CTB (being the cement stabilized base course reclaimed materials).
(2) the CTB grating is optimized adjustment, adopt the cold in place recycling legal system to be equipped with the cold regeneration blended stock of foamed asphalt, be specially: CTB, pitch, cement, hydromining are carried out the cold regeneration of foamed asphalt and finish simultaneously paving with regenerating device on the spot, cement adopts the cement slurry car to spill cloth, and the weight of each material is respectively:
CTB 1575t；
Pitch 42.5t;
Cement 31.5t;
Water 151.2t,
Grading limit according to the cold regeneration blended stock of foamed asphalt of CTB preparation is:
| Screen size (mm) | 37.5 | 31.5 | 26.5 | 19 | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Weight percent (%) | 100 | 99.6 | 97.8 | 89.0 | 85.2 | 79.5 | 71.4 | 42.4 | 26.1 | 15.7 | 11.9 | 7.7 | 5.7 | 4.0 |
In this step, the preferred Binzhou of described pitch A-70 pitch, best foaming condition is: 160 ℃ of blowing temperatures, foaming water supply volume 2.0%, 25 times of expansion rates, half-life 24s; Described cement is Portland cement, and grade is 32.5.
For making the cold regeneration blended stock of the foamed asphalt that makes have good intensity and water stability, temperature should not be lower than 15 ℃ in the work progress.
(3) to adopt regenerating device regeneration and pave after the cold regeneration blended stock of foamed asphalt carry out on-site rolling, form the cold regeneration zone of foamed asphalt.
(4) on the cold regeneration zone of foamed asphalt, spill cloth modified bitumen heat and mix the rubble stress absorbing layer, to guarantee the bond strength between cold regeneration zone of foamed asphalt and the modified asphalt concrete skin coat, this spills cloth modified bitumen heat and mixes the rubble stress absorbing layer and mix rubble by SBS modified bitumen and heat and constitute, and the sprinkling amount of SBS modified bitumen is 2.0kg/m
2, heat is mixed rubble, and to spill the cloth rate be 55%.
(5) mix making individual layer modified asphalt concrete (AC-13C) skin coat on the rubble stress absorbing layer in modified bitumen heat.
The cold regeneration zone of foamed asphalt after the moulding is carried out the 48-72h health, and open to traffic again guarantees the stability at road surface initial stage after maintenance.
With long 1km, wide 3.75m road surface, handling thickness is that 20cm is an example, the step of the job practices on cold regeneration techniques maintenance road surface is:
(1) on-the-spot milling cement stabilized base course obtains CTB (being the cement stabilized base course reclaimed materials).
(2) the CTB grating is optimized adjustment, adopts the cold in place recycling legal system to be equipped with the cold regeneration blended stock of foamed asphalt, specifically be same as embodiment 2, the weight of each material is respectively:
CTB 1307t；
Pitch 44.1t;
Cement 31.5t;
Fine aggregate 267.8t;
Water 155.9t;
Grading limit according to the cold regeneration blended stock of foamed asphalt of CTB preparation is:
Adding particle size range in the present embodiment is the fine aggregate of 0～5mm, to satisfy the requirement of the cold regeneration blended stock of foamed asphalt grating.
In this step, the preferred Binzhou of described pitch A-70 pitch, best foaming condition is: 160 ℃ of blowing temperatures, foaming water supply volume 2.0%, 25 times of expansion rates, half-life 24s; Described cement is Portland cement, and grade is 32.5.
For making the cold regeneration blended stock of the foamed asphalt that makes have good intensity and water stability, temperature should not be lower than 15 ℃ in the work progress.
(3) to adopt regenerating device regeneration and pave after the cold regeneration blended stock of foamed asphalt carry out on-site rolling, form the cold regeneration zone of foamed asphalt, carry out again the cold regeneration blended stock of foamed asphalt preparation, pave, roll and form the cold regeneration zone of second layer foamed asphalt.
(4) on the cold regeneration zone of second layer foamed asphalt, spill cloth modified bitumen heat and mix the rubble stress absorbing layer, to guarantee the bond strength between cold regeneration zone of foamed asphalt and the modified asphalt concrete skin coat, this stress absorbing layer is mixed rubble by SBS modified bitumen and heat and is constituted, and the sprinkling amount of SBS modified bitumen is 2.0kg/m
2, heat is mixed rubble, and to spill the cloth rate be 55%.
(5) making individual layer modified asphalt concrete (AC-13C) skin coat on stress absorbing layer.
The cold regeneration zone of foamed asphalt after the moulding is carried out the 48-72h health, and open to traffic again guarantees the stability at road surface initial stage after maintenance.
With long 1km, wide 3.75m road surface, handling thickness is that 18cm is an example, adopts the step of the job practices on cold regeneration techniques maintenance road surface to be:
(1) the original pavement asphalt surface layer of on-the-spot milling obtains RAP (being the asphalt surface course reclaimed materials).
(2) the RAP grating is optimized adjustment, adopts the cold method of reproduction of plantmix to prepare the cold regeneration blended stock of foamed asphalt, specifically be same as embodiment 1, the weight of each material is respectively:
RAP 1262t；
Pitch 37.1t;
Cement 22.3t;
Fine aggregate 222.8t;
Water 106.9t,
Mix evenly promptly makes the cold regeneration blended stock of foamed asphalt.
Grading limit according to the cold regeneration blended stock of foamed asphalt of RAP preparation is:
Adding particle size range in this step is the fine aggregate of 0～5mm, the cold regeneration blended stock of foamed asphalt is carried out the grating adjustment, to satisfy the grating requirement.
In this step, the preferred Binzhou of described pitch A-70 pitch, best foaming condition is: 160 ℃ of blowing temperatures, foaming water supply volume 2.0%, 25 times of expansion rates, half-life 24s; Described cement is Portland cement, and grade is 32.5.
For making the cold regeneration blended stock of the foamed asphalt that makes have good intensity and water stability, temperature should not be lower than 15 ℃ in the work progress.
(3) the cold regeneration blended stock of foamed asphalt is transported to carries out the scene behind the job site and pave, and on-site rolling forms the cold regeneration zone of foamed asphalt, carry out again the cold regeneration blended stock of foamed asphalt preparation, pave, roll and form the cold regeneration zone of second layer foamed asphalt.
(4) on the cold regeneration zone of second layer foamed asphalt, spill cloth modified bitumen heat and mix the rubble stress absorbing layer, to guarantee the bond strength between cold regeneration zone of foamed asphalt and the modified asphalt concrete skin coat, this modified bitumen heat is mixed the rubble stress absorbing layer and is mixed rubble by SBS modified bitumen and heat and constitute, and the sprinkling amount of SBS modified bitumen is 2.2kg/m
2, heat is mixed rubble, and to spill the cloth rate be 60%.
(5) mix making individual layer modified asphalt concrete (AC-13C) skin coat on the rubble stress absorbing layer in modified bitumen heat.
The cold regeneration zone of foamed asphalt after the moulding is carried out the 48-72h health, and open to traffic again guarantees the stability at road surface initial stage after maintenance.
Claims (6)
1. job practices that adopts cold regeneration techniques maintenance road surface is characterized in that: may further comprise the steps:
(1) on-the-spot road-surface milling obtains reclaimed materials;
(2) grating to reclaimed materials is optimized adjustment, reclaimed materials is mixed the cold regeneration blended stock of preparation foamed asphalt by grating with pitch, cement, water;
(3) the cold regeneration blended stock of foamed asphalt is carried out the scene and pave, roll, form the cold regeneration zone of foamed asphalt, the cold regeneration zone of this foamed asphalt is 1～2 layer;
(4) on the cold regeneration zone of foamed asphalt, spill cloth modified bitumen heat and mix the rubble stress absorbing layer;
(5) mix making individual layer modified asphalt concrete cover on the rubble stress absorbing layer in modified bitumen heat, can finish the construction of pavement maintenance.
2. the job practices on the cold regeneration techniques maintenance of employing according to claim 1 road surface is characterized in that: in the described step (2), the ratio of weight and number of reclaimed materials in cold each material of regeneration blended stock of formation foamed asphalt and pitch, cement, water is:
80～100 parts of reclaimed materials;
2～3 parts of pitches;
1～2 part of cement;
4～10 parts in water.
3. the job practices on the cold regeneration techniques of employing according to claim 1 maintenance road surface, it is characterized in that: described reclaimed materials is the asphalt surface course reclaimed materials, the grading limit of the cold regeneration blended stock of foamed asphalt for preparing with the asphalt surface course reclaimed materials is:
4. the job practices on the cold regeneration techniques of employing according to claim 1 maintenance road surface, it is characterized in that: described reclaimed materials is the cement stabilized base course reclaimed materials, the grading limit of the cold regeneration blended stock of foamed asphalt for preparing with the cement stabilized base course reclaimed materials is:
5. according to the job practices on claim 3 or the cold regeneration techniques maintenance of 4 described employings road surface, it is characterized in that: the cold regeneration blended stock of described foamed asphalt also comprises the fine aggregate that is not more than 20 weight portions.
6. the job practices on the cold regeneration techniques maintenance of employing according to claim 1 road surface, it is characterized in that: described modified bitumen heat is mixed the rubble stress absorbing layer and is mixed rubble by SBS modified bitumen and heat and constitute, and wherein SBS modified bitumen sprinkling amount is 1.8～2.2kg/m
2, heat is mixed rubble, and to spill the cloth rate be 50%～60%.
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Families Citing this family (16)
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| CN101768912B (en) * | 2010-01-05 | 2012-09-05 | 江西赣粤高速公路股份有限公司 | Cold recycled asphalt mixture processing method for pavement spread |
| CN102041761B (en) * | 2010-11-30 | 2012-11-28 | 中公高科养护科技股份有限公司 | Road surface layer structure and road surface old material recycling method |
| CN102503270B (en) * | 2011-10-27 | 2013-04-24 | 武汉理工大学 | Method for designing mix proportion of asphalt road base cold recycled mixture |
| CN102677567B (en) * | 2012-05-03 | 2014-12-31 | 华南理工大学 | Asphalt pavement structure regenerated from concrete pavement and construction method of asphalt pavement structure |
| CN102964108B (en) * | 2012-12-17 | 2014-12-03 | 武汉理工大学 | Foamed asphalt-steel slag mixture and preparation method thereof |
| CN104762861A (en) * | 2015-03-23 | 2015-07-08 | 华南理工大学 | Semi-flexible pavement based on cold-recycling base of bituminous pavement and construction method of semi-flexible pavement |
| CN105002800B (en) * | 2015-07-27 | 2017-04-12 | 福州市规划设计研究院 | Pavement overhaul method and structure for treating different lane road surfaces with large road condition differences |
| 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 |
| CN105926398B (en) * | 2016-06-03 | 2018-07-20 | 中建路桥集团基础工程有限公司 | A kind of express highway pavement method for repairing and mending |
| CN106988188A (en) * | 2017-05-18 | 2017-07-28 | 江苏道润工程技术有限公司 | The construction method and construction system of cold in place recycling |
| CN108484071B (en) * | 2018-04-08 | 2020-11-06 | 长安大学 | Foamed asphalt in-situ cold regeneration mixture and grading method and application thereof |
| CN109778657B (en) * | 2019-03-29 | 2023-07-07 | 哈尔滨康力鸿商贸有限公司 | Quick maintenance method for cement pavement |
| CN111058357A (en) * | 2020-01-14 | 2020-04-24 | 黑龙江省八达路桥建设有限公司 | Cold recycling construction method for foamed asphalt of pavement |
| CN111304994B (en) * | 2020-03-31 | 2023-04-28 | 广西交投科技有限公司 | Semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance |
| CN111501470B (en) * | 2020-05-14 | 2021-09-21 | 西安市政道桥建设有限公司 | Pavement integral repairing method based on grid flowing water paving and obtained new road |
| CN113443873A (en) * | 2021-06-28 | 2021-09-28 | 武汉江夏路桥工程总公司 | High-performance foamed asphalt in-place cold recycling mixture |
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