CN103266553B - A kind of site Cold Recycling - Google Patents
A kind of site Cold Recycling Download PDFInfo
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- CN103266553B CN103266553B CN201310212980.7A CN201310212980A CN103266553B CN 103266553 B CN103266553 B CN 103266553B CN 201310212980 A CN201310212980 A CN 201310212980A CN 103266553 B CN103266553 B CN 103266553B
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Abstract
The present invention relates to field of road construction, in particular to a kind of site Cold Recycling and construction system.Site Cold Recycling comprises the following steps: carry out pretreatment to pending old pavement; Spreading cement in old pavement after the pre-treatment; Have at spreading on the old pavement of cement and add mulseal and water, and carry out milling, obtain compound; Mixture laying, after milling, compacting is carried out on road surface, the road surface after compacting left standstill 3-5 days.This site Cold Recycling provided by the invention, can overcome the potential problems such as warm plastic forming, shrinkage crack, reflection crack that conventional method use produces with the road surface that foamed asphalt is main regenerative agent.In addition, operation controllability of the present invention is strong, and construction flexibly, and the regenerative agent of the foamed asphalt that mulseal is more traditional simultaneously and cement composition, its cost is cheaper.
Description
Technical field
The present invention relates to field of road construction, in particular to a kind of site Cold Recycling and construction system.
Background technology
At present, in road construction and maintenance field, old road thereof, cold in place recycling (ColdIn-placeRecycling, CIR) has become one of main method of old road maintenance and renovation, upgrading in the world; Cold in place recycling refers to and utilizes bitumen regeneration equipment to be smashed on the spot by old bitumen pavement material, and adds suitable regenerative agent and mix and stir compacting, is major in the technology of building road with old pavement material.
But, at present in the correlation technique of cold in place recycling, comprise the road surface of simply needs being repaired carry out clean wait pretreatment after carry out milling again, and then add virgin material and regenerative agent (being mainly foamed asphalt), finally again by operations such as pavement compactions to the road surface after milling; In the correlation technique of cold in place recycling, regenerative agent is mainly based on foamed asphalt, and the road surface of regeneration easily produces the potential problems such as warm plastic forming, shrinkage crack, reflection crack, have impact on functional performance and the comfortableness of road.
Summary of the invention
The object of the present invention is to provide a kind of site Cold Recycling, to solve the above problems.
Provide a kind of site Cold Recycling in embodiments of the invention, comprise the following steps: pretreatment is carried out to pending old pavement; Spreading cement in old pavement after the pre-treatment; Have at spreading on the old pavement of cement and add mulseal and water, and carry out milling, obtain compound; Described mixture laying, after milling, compacting is carried out on road surface, the road surface after compacting left standstill 3-5 days.
Present invention also offers a kind of construction system of corresponding site Cold Recycling, comprising: mulseal load wagon, for the mulseal that will contain; Dress waterwheel, for containing water; Regenerating device, is connected with described dress waterwheel with described mulseal load wagon, for the water in the mulseal in described mulseal load wagon and described dress waterwheel is sprayed at the old pavement that spreading has cement, and carries out milling to old pavement; Paver, for by the road surface of mixture laying after milling; Road roller, for the pavement compaction by the compound that paves.
This site Cold Recycling that the embodiment of the present invention provides, after pending old pavement is carried out pretreatment, old pavement adds cement, mulseal as regenerative agent, by milling, pave and after the operation such as compacting, complete the process of regeneration; In the present invention, using mulseal and cement as regenerative agent, mulseal is that pitch and emulsifier generate oil-in-water or water in oil liquid bitumen, it is easy to be diffused in water and also liquefies at normal temperatures, and post liquefaction viscosity is very low, good fluidity, cement is used for and mulseal mix as Admixture, after milling, the compound obtained is paved, after compacting, it can overcome the potential problems such as warm plastic forming, shrinkage crack, reflection crack that the conventional method road surface that to use with foamed asphalt be main regenerative agent produces.
In addition, the present invention by old pavement pretreatment, add cement, mulseal and water, milling, to pave and the process of cold in place recycling is carried out in the sequence of operations such as compacting, each step of regeneration sequentially progressively completes, operation controllability is strong, and construction flexibly, the regenerative agent of the foamed asphalt that mulseal is more traditional simultaneously and cement composition, its cost is cheaper.
Accompanying drawing explanation
Fig. 1 shows the flow chart of the site Cold Recycling of the embodiment of the present invention 1.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Please refer to Fig. 1, the site Cold Recycling that the embodiment of the present invention one provides, comprising:
Step 101: pretreatment is carried out to pending old pavement;
Pretreated process refers to is undertaken leveling the process of sweeping by pending road surface, so that subsequent regeneration process can be carried out smoothly, concrete, in the present embodiment, pretreatment can also be included in the measurement pending road surface being carried out to deflection value, and in the process of operation, the deflection value of road should be not more than 0.3 millimeter, when the deflection value of road is greater than 0.3 millimeter, then needs to get core and further evaluate; In the present embodiment, the method for designing of compound and Performance Evaluating Indexes are tested by the standard of table 1, for the construction method of the cold renewal of the present embodiment provides foundation:
The technical requirements of table 1 mulseal cold in place recycling asphalt mixture design
Step 102: spreading cement in old pavement after the pre-treatment;
Cement is spread on paving road surface after pre-processing as Admixture, and for mixing with the mulseal and aqueous phase of follow-up sprinkling.
Step 103: have at spreading on the old pavement of cement and add mulseal and water, and carry out milling, obtain compound;
Step 103 is the process of concrete regeneration, mulseal, water the compound formed after milling is added at the old pavement being added with cement, its superior performance, and the reworked material of mulseal and water composition can be applied on higher road surface structare layer, sometimes, can also use as top layer, like this, a large amount of pavement construction funds can be saved.
Step 104: described mixture laying, after milling, compacting is carried out on road surface, the road surface after compacting left standstill 3-5 days;
After compacting, road surface is left standstill the scheduled time, namely the process of regeneration is completed, the method of this cold in place recycling that the present embodiment provides, after pending old pavement is carried out pretreatment, old pavement adds cement, mulseal and water as regenerative agent, by milling, pave and after the operation such as compacting, complete the process of regeneration; In the present invention, using mulseal and cement as regenerative agent, mulseal is that pitch and emulsifier generate oil-in-water or water in oil liquid bitumen, it is easy to be diffused in water and also liquefies at normal temperatures, and post liquefaction viscosity is very low, good fluidity, cement is used for and mulseal mix as Admixture, after milling, the compound obtained is paved, after compacting, it can overcome the potential problems such as warm plastic forming, shrinkage crack, reflection crack that the conventional method road surface that to use with foamed asphalt be main regenerative agent produces.
In addition, the present invention by old pavement pretreatment, add cement, mulseal and water, milling, to pave and the process of cold in place recycling is carried out in the sequence of operations such as compacting, each step of regeneration sequentially progressively completes, operation controllability is strong, and construction flexibly, the regenerative agent of the foamed asphalt that mulseal is more traditional simultaneously and cement composition, its cost is cheaper.
Better apply to make a kind of site Cold Recycling of the embodiment of the present invention one, more effectively be applied in road maintenance, the present invention also provides embodiment two on the basis of above-described embodiment one, embodiment two is the further restriction and increase made the concrete steps of embodiment one, is now described in detail and explains:
Embodiment two
Step: 201: clear up pending old pavement.
Concrete, in step 201; Can the disease such as comparatively serious slight crack of remaining impurity and appearance in road pavement clear up, to ensure that the smooth and easy of subsequent regeneration process carries out.
Step 202: milling area delimited to the old pavement after cleaning.
In above-mentioned steps 202, when cleaning step complete after, need to pending old pavement delimit regeneration area, concrete regeneration area can according to the situation of the deflection value of road and get core evaluate situation make concrete selection.
Step 203: have at spreading on the old pavement of cement and evenly spray mulseal and water;
In step 203, with regard to actual conditions, after milling area is determined, the process regenerated can be carried out.
Step 204: have the road surface of mulseal and water to carry out milling sprinkling, obtain compound.
In step 204, mulseal, cement and water mix with the old material obtained after milling old pavement, and then obtain compound, in concrete operating process, compound is all exist with the form of stockpile, and the diameter of stockpile is roughly 1 meter, is piled up by compound with the form of stockpile, like this, transfer and the lifting of whole compound is convenient to; Concrete, the speed of milling controls between 2-10 m/min.
Step 205: described compound to be promoted in mixer and again to mix.
In step 205, after obtaining compound, in order to the phenomenon preventing compound from occurring segregation, then need again to mix compound, until after mixing, guarantee segregation phenomenon can not occur.
Step 206: by compacting is carried out on the road surface of described mixture laying after milling, the road surface after compacting is left standstill 3-5 days.
After compound mixes, it can pave as reworked material, and, in concrete operating process, the paving thickness of compound and the time of compacting all determine according to the milling degree of depth, concrete, the degree of depth of milling is generally 5-15 centimetre, is preferably 13 centimetres; And in order to ensure that compound after compaction, can be corresponding with the milling degree of depth, therefore, the paving thickness of compound should be a bit larger tham the degree of depth of milling, and the time of compacting is 1-3 hour, generally speaking, within 2 hours, can complete compacting process; After compacting operation, after leaving standstill 3-5 days, material sex change to be regenerated, then complete the process of whole regeneration.
Step 207: the road surface after leaving standstill overlays sealing.
Concrete, when regenerated road surface is by after compacting, also can carry out health operation to it, generally speaking, when road surface needs when the short time is open, then road surface after regeneration overlays sealing, after adding paving sealing, and can interim open to traffic after about 3-5 days.
Step 208: to overlay on the road surface after sealing outrigger location again; After regeneration road adds paving sealing, finally outrigger location on paving sealing, completes the repair process of whole road.
The present embodiment additionally provides a kind of construction system of corresponding site Cold Recycling, comprising: mulseal load wagon, for the mulseal that will contain; Dress waterwheel, for containing water; Regenerating device, is connected with described dress waterwheel with described mulseal load wagon, for the water in the mulseal in described mulseal load wagon and described dress waterwheel is sprayed at the old pavement that spreading has cement, and carries out milling to old pavement; Paver, for by the road surface of mixture laying after milling; Road roller, for the pavement compaction by the compound that paves; Elevator, described elevator is connected with described paver, and for the compound obtained after described milling is promoted in the hopper of paver; It is to be noted, the paver of the present embodiment can ensure the effect paved on the one hand, on the other hand, also be there is the effect again mixed by the compound after being promoted by elevator, and compound also can be promoted in transport vehicle by elevator, transfer in the hopper of paver of strange land, carry out strange land operation.
Concrete, in order to realize better regeneration effect, should according to the flow process of practice of construction when CIR900 system (regenerating device, elevator, mulseal load wagon tank car etc.) can be adopted to carry out cold in place recycling, determine equipment order as requested, concrete operation, by the computer control panel of RoadtecCIR900 regenerating device, controls regenerating device work after the every regeneration related data of correct input and regenerative process is achieved; RoadtecCIR900 regenerating device has the two-way milling degree of depth, four crawler travel mode good stabilities, the computer that accurately control and accurately controls the advantages such as mulseal dosage, and working width is 3.81 meters, is greater than the width (3.75 meters) in a track; Convenient construction.
In addition, distance between regenerating device and paver can be determined according to the working time of mixing and stirring of situ regeneration compound, generally should not be excessively far away, to avoid occurring to cause compound breakdown of emulsion to have little time situation about rolling due to fortuitous event, also it should be noted that, in the process of regeneration, directly compound can be transported in paver and construct, also can compound be risen in dumper, be transported to operating point, strange land and construct.
The construction method of this cold in place recycling provided by the invention and construction system, shown by economic environment index analysis, substitute the hot-mix asphalt mixture maintenance engineering of every 1,000,000 square metres according to mulseal Local Cold Regenerating Technology, maintenance fund 7,590,000 yuan can be saved, CO2 discharge value reduces 4224 tons, diesel oil saves 1183 tons and new building stones save 16.7 ten thousand tons; In addition, Local Cold Regenerating Technology need not batching plant, interruption of communication is little, on-site noise is low, non smoke and pernicious gas, meet the state basic policy of " energy-saving and emission-reduction ", there is significant economic benefit and social benefit.
Saving maintenance fund as having, economizing on resources, the old asphalt pavement Local Cold Regenerating Technology being directly used as surface layer of protection of the environment and important technical advance has important practical significance for raising China asphalt pavement conserving renovation technique level; this technology embodies the highway transportation sustainable development requirement of " resources conservation, environmental friendliness ", meets the state basic policy of " energy-saving and emission-reduction ".
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a site Cold Recycling, is characterized in that, comprises the following steps:
Pretreatment is carried out to pending old pavement; Pretreatment comprises the measurement pending road surface being carried out to deflection value, and in the process of operation, the deflection value of road should be not more than 0.3 millimeter, when the deflection value of road is greater than 0.3 millimeter, then needs to get core and further evaluates;
Spreading cement in old pavement after the pre-treatment;
Have at spreading on the old pavement of cement and add mulseal and water, and carry out milling, obtain compound, wherein, have at spreading on the old pavement of cement and evenly spray mulseal and water; There is the road surface of mulseal and water to carry out milling sprinkling, obtain compound;
Described mixture laying, after milling, compacting is carried out on road surface, the road surface after compacting left standstill 3-5 days;
Have at described spreading on the old pavement of cement and add mulseal and water, and carry out milling, after obtaining the step of compound, compacting will carried out in the road surface of described mixture laying after milling, before road surface after compacting being left standstill the step of 3-5 days, also comprise:
Described compound to be promoted in mixer and again to mix.
2. site Cold Recycling according to claim 1, is characterized in that, carries out, in pretreated step, specifically comprising to pending old pavement described:
Clear up pending old pavement;
Milling area delimited to the old pavement after cleaning.
3. site Cold Recycling according to claim 1, is characterized in that, described mixture laying is being carried out compacting on road surface, the road surface after compacting is left standstill 3-5 days, is completing in the step of regeneration:
The paving thickness of described compound is: 5-15 centimetre;
The described compacting time is: 1-3 hour.
4. site Cold Recycling according to claim 1, is characterized in that, described mixture laying is being carried out compacting on road surface, after the road surface after compacting being left standstill the step of 3-5 days, also to comprise:
Road surface after leaving standstill overlays sealing.
5. site Cold Recycling according to claim 4, is characterized in that, after described road surface after leaving standstill overlays sealing, also comprises:
Outrigger location on road surface after overlaying sealing.
6. the site Cold Recycling according to any one of claim 1-5, is characterized in that, has on the old pavement of cement and adds mulseal and water, and carry out milling, obtain in the step of compound at spreading,
The speed of described milling is 2-10 m/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310212980.7A CN103266553B (en) | 2013-05-31 | 2013-05-31 | A kind of site Cold Recycling |
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| CN201310212980.7A CN103266553B (en) | 2013-05-31 | 2013-05-31 | A kind of site Cold Recycling |
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| CN103266553B true CN103266553B (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201800006952A1 (en) * | 2018-07-05 | 2020-01-05 | Road surface restoration system of bituminous conglomerate |
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| CN105332329A (en) * | 2015-11-17 | 2016-02-17 | 江苏中路工程技术研究院有限公司 | Pavement crack disposal structure and technology |
| CN106592387A (en) * | 2016-12-22 | 2017-04-26 | 江苏四通路桥工程有限公司 | Cold in-place recycling construction method |
| 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 |
| 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 |
| CN107503269A (en) * | 2017-08-11 | 2017-12-22 | 河北路德工程技术有限公司 | A kind of novel foam pitch site Cold Recycling |
| US10407841B2 (en) * | 2017-10-25 | 2019-09-10 | Caterpillar Paving Products Inc. | Rotary mixing system |
| CN109487661B (en) * | 2018-11-29 | 2021-04-20 | 江苏北极星交通产业集团有限公司 | Foamed asphalt in-situ cold regeneration construction method for 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 |
| CN111636282A (en) * | 2020-07-13 | 2020-09-08 | 长安大学 | Method for implementing pavement maintenance based on in-situ softening technology of semi-rigid pavement base |
| CN113403922A (en) * | 2021-07-06 | 2021-09-17 | 浙江春天建设有限公司 | Construction method and construction equipment for in-situ cold regeneration of road macadam base |
| CN115262360A (en) * | 2022-09-01 | 2022-11-01 | 青岛临空新能源科技有限公司 | Processing and regenerating device and method for waste asphalt material |
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