CN102561141B - Asphalt pavement reclamation method using hot mix asphalt mixture to heat cold mix asphalt mixture - Google Patents
Asphalt pavement reclamation method using hot mix asphalt mixture to heat cold mix asphalt mixture Download PDFInfo
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- CN102561141B CN102561141B CN201210008272.7A CN201210008272A CN102561141B CN 102561141 B CN102561141 B CN 102561141B CN 201210008272 A CN201210008272 A CN 201210008272A CN 102561141 B CN102561141 B CN 102561141B
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- 239000000203 mixture Substances 0.000 title claims abstract description 161
- 239000010426 asphalt Substances 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000005056 compaction Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 19
- 238000011069 regeneration method Methods 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 235000013599 spices Nutrition 0.000 claims description 4
- 238000009490 roller compaction Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 12
- 230000001172 regenerating effect Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 6
- 230000008929 regeneration Effects 0.000 description 6
- 238000003776 cleavage reaction Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 230000007017 scission Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses an asphalt pavement reclamation method using a hot mix asphalt mixture to heat a cold mix asphalt mixture. The asphalt pavement reclamation method includes firstly paving an underlay hot mix asphalt mixture; secondly, paving the cold reclaimed mix asphalt mixture; thirdly, performing once compaction forming of the underlay hot mix asphalt mixture and the cold mix reclaimed mix asphalt mixture; and fourthly, paving and compacting an overlay hot mix asphalt mixture. By means of the asphalt pavement reclamation method, heat energy of the on-the-spot paved hot mix asphalt mixture is used for heating the cold reclaimed mix asphalt mixture, accordingly energy is saved, waste gas discharging is reduced, and environment protection is facilitated.
Description
Technical field
The present invention relates to a kind of asphalt road surface renovation process, particularly a kind of asphalt pavement regeneration method of utilizing hot-mix asphalt mixture heating cold mixing reclaimed asphalt mixture.
Background technology
Patent of invention ZL201010147182.7 " method for heating and rolling of cold plant-mixed recycled asphalt mixtures with emulsion asphalt " adopts infrared rays or carry out microwave radiation heating paves or tentatively roll after cold mixing compound, need to adopt special-purpose firing equipment and consume a large amount of fuel.
Summary of the invention
The object of this invention is to provide a kind of asphalt pavement regeneration method of utilizing hot-mix asphalt mixture heating cold mixing reclaimed asphalt mixture.The technical problem solving is to utilize the heat energy of the on-the-spot hot-mix asphalt mixture paving, heating cold mixing reclaimed asphalt mixture.
The object of the invention is achieved through the following technical solutions:
Asphalt pavement regeneration method with hot spice heating cold mixing material, comprises the following steps:
(1) the lower floor's hot-mix asphalt mixture that paves;
(2) the cold mixing reclaimed asphalt mixture that paves: in 5min, cold mixing reclaimed asphalt mixture paves after lower floor's hot-mix asphalt mixture paves; Paving thickness is 20% ~ 60% of lower floor's hot-mix asphalt mixture paving thickness;
(3) lower floor's hot-mix asphalt mixture and the disposable roller-compaction of cold mixing reclaimed asphalt mixture: after cold mixing reclaimed asphalt mixture paves, in 3min, on cold mixing reclaimed asphalt mixture surface, roll; Roll to the degree of compaction of cold mixing reclaimed asphalt mixture and lower floor's hot-laid mixture be 95% ~ 100%;
(4) overlying strata hot-mix asphalt mixture paving and rolling
In step (3), rolled the overlying strata hot-mix asphalt mixture that paves in rear 3min, roll to the degree of compaction of overlying strata hot-laid mixture be 95% ~ 100%.
Lower floor's hot-mix asphalt mixture that step (1) is described
'spaving thickness is 4cm ~ 15cm; The temperature that paves is 140 ℃ ~ 185 ℃; The speed of paving is 1m/min ~ 3 m/min.
The speed that paves of described cold mixing reclaimed asphalt mixture is identical identical with the lower floor hot-mix asphalt mixture speed that paves.
The described process of rolling is closed the watering device of road roller.
Described rolling is to adopt dual-steel wheel road roller and rubber-tyred roller to combine to roll.
Total moisture content in cold mixing reclaimed asphalt mixture is less than 5%; Total moisture content refers to that the water in water, external adding water, mineral aggregate and the recovery asphalt pavement material in mulseal or foamed asphalt accounts for the mass percent of solid body (mineral aggregate and recovery asphalt pavement material);
Degree of compaction is defined as: the percentage of the theoretical maximum density of the compound of measuring according to the bulk density of the compound that in existing < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTG E20-2011), T0705-2011 surface drying method is measured and T0711-2011 vacuum method.
Roll to the degree of compaction of overlying strata hot-laid mixture be 95% ~ 100%, stop rolling.Roll after end, material skin temperature to be mixed is down to 60 ℃ when following, completes whole construction workings.
The advantage that the present invention has with respect to prior art and beneficial effect.
Patent of invention ZL201010147182.7 " method for heating and rolling of cold plant-mixed recycled asphalt mixtures with emulsion asphalt " adopts infrared rays or carry out microwave radiation heating cold mixing compound, need to adopt special-purpose firing equipment and consume a large amount of fuel.
The present invention utilizes the heat energy of the hot-mix asphalt mixture that scene paves, heating cold mixing regenerating mixture.Can energy conservation, reduce toxic emission, be conducive to protection of the environment.
The specific embodiment
Below in conjunction with example, the present invention is described in further detail:
Certain speedway maintenance works, former road structure is from top to bottom: the AC-13C type hot-mix asphalt mixture of 4cm thickness, the AC-20C type hot-mix asphalt mixture of 6cm thickness, the AC-25C type hot-mix asphalt mixture of 8cm thickness, on the cement stabilized macadam of 18cm thickness the cement stabilized macadam of basic unit and 18cm thickness go to a grassroots level.After maintenance, road structure is from top to bottom: the AC-13C type hot-mix asphalt mixture of 4cm thickness, the AC-20C type hot-mix asphalt mixture of 6cm thickness, the AC-25C type hot-mix asphalt mixture of 8cm thickness, the mulseal cold mixing reclaimed asphalt mixture of 6cm thickness, the ATB-30 type hot-mix asphalt mixture of 12cm thickness and the cement stabilized macadam of 18cm thickness are gone to a grassroots level.Maintenance width of roadway is 3.75m, and length is 2km.
In present embodiment, embodiment 1 and comparative example's cold mixing reclaimed asphalt mixture all adopts identical recovery asphalt pavement material, and admixture quality is for reclaiming the Portland cement that the strength grade of asphalt pavement material 1.5% is 32.5.Wherein, in the regenerating mixture of embodiment 1 new admixture quality for reclaiming the mulseal (amount to into mass ratio be 1.0% pitch) of asphalt pavement material 2%; And admixture the mass ratio water that is 3.5%, the total moisture content in regenerating mixture is 5%; Total moisture content refers to that the water in water, external adding water, mineral aggregate and the recovery asphalt pavement material in mulseal accounts for the mass percent of solid body (mineral aggregate and recovery asphalt pavement material).
In comparative example's reclaimed asphalt mixture new admixture quality for reclaiming the mulseal (amount to into mass ratio be 2.5% pitch) of asphalt pavement material 5%, and admixture quality for reclaiming the water of asphalt pavement material 3%.
The pavement construction of two kinds of construction methods finishes after 7d, the cleavage strength that the regenerated road surface core of the mulseal by the different construction methods of core detection, admixture different proportion is 15 ℃.Core diameter is 100mm, is highly 55mm ~ 65mm.First core is cut into diameter 100mm, the standard specimen of height 50mm, then, according to T0716-2011 method in < < highway engineering pitch and Asphalt Mixture Experiment rules > > (JTG E20-2011), measured the cleavage strength of 15 ℃ of test specimens.Result of the test is in Table 1.
embodiment 1 construction method of the present invention
(1) the ATB-30 type hot-mix asphalt mixture that paves
Paving thickness is 14cm; Coefficient of loose laying is 1.17, and after compacting, thickness is 12cm.The temperature that paves is 165 ℃.The speed of paving is 2.5 m/min.
(2) the cold mixing regenerating mixture that paves
Paving thickness is 7.5cm; Coefficient of loose laying is 1.25, and after compacting, thickness is 6cm.
3min after the ATB-30 of lower floor type hot-mix asphalt mixture paves, cold mixing regenerating mixture starts to pave.
The speed of paving is 2.5 m/min, identical with the ATB-30 of the lower floor type hot-mix asphalt mixture speed that paves.
(3) ATB-30 of lower floor type hot-mix asphalt mixture and the disposable roller-compaction of cold mixing material
After cold mixing reclaimed asphalt mixture paves, 3min starts to roll.Cold mixing mix surface after paving, adopts dual-steel wheel road roller and rubber-tyred roller to combine and rolls.Roll in process, close the watering device of road roller.
Be equipped with dual-steel wheel road roller and 2 the 30T rubber-tyred rollers of 2 13T, in 15min, every road roller rolls 2 times, rolled altogether 8 times.
(4) overlying strata AC-25C type hot-mix asphalt mixture paving and rolling
In (3) step, rolled rear 3min, overlying strata AC-25C type hot-mix asphalt mixture starts to pave.The dual-steel wheel road roller and 2 the 30T rubber-tyred rollers that have been equipped with 2 13T, every road roller rolls 2 times, rolled altogether 8 times.
Roll and finish latter 5 hours, compound skin temperature is down to below 50 ℃ after testing.
Next day, through the degree of compaction average of core detection ATB-30 type bituminous mixture be 97%, the degree of compaction average of cold mixing regenerating mixture is 98%, the degree of compaction average of AC-25C type bituminous mixture is 98%.
the layered rolling technique of comparative example's current specifications
(1) the ATB-30 type hot-mix asphalt mixture that paves
Paving thickness is 14cm; Coefficient of loose laying is 1.17, and after compacting, thickness is 12cm.The temperature that paves is 165 ℃.The speed of paving is 2.5 m/min.
(2) roll ATB-30 type hot-mix asphalt mixture
The dual-steel wheel road roller and 1 the 30T rubber-tyred roller that adopt 3 13T, every road roller rolls 2 times, rolled altogether 8 times.
Degree of compaction average through core detection ATB-30 type bituminous mixture is 98%.
(3) the cold mixing reclaimed asphalt mixture that paves
According to existing < < standard specification for construction and acceptance of highway asphalt pavement > > (JTG F40-2004) 5.9.1 bar, stipulate, etc. mix surface temperature, lower than after 50 ℃, cold mixing regenerating mixture starts to pave.
Paving thickness is 7.5cm; Coefficient of loose laying is 1.25, and after compacting, thickness is 6cm.The speed of paving is 2.5 m/min.
(4) roll cold mixing reclaimed asphalt mixture
According to the method for existing < < asphalt highway regeneration techniques standard > > (JTG F41-2008), under optimum moisture content, at normal temperatures, adopt 2 dual-steel wheel road rollers and 2 rubber-tyred rollers to roll the reclaimed asphalt mixture after paving, every road roller rolls 2 times, rolls altogether 8 times.Degree of compaction average through core detection cold mixing regenerating mixture is 97%.
Roll after end, according to existing < < asphalt highway regeneration techniques standard > > (JTG F41-2008) 8.7.1 bar regulation, to after cold regeneration zone health 7d, overlying strata AC-25C hot-mix asphalt mixture paves.
(5) overlying strata AC-25C type hot-mix asphalt mixture paving and rolling
According to the method for existing < < standard specification for construction and acceptance of highway asphalt pavement > > (JTG F40-2004) the overlying strata AC-25C type hot-mix asphalt mixture that paves.The dual-steel wheel road roller and 2 the 30T rubber-tyred rollers that have been equipped with 2 13T, every road roller rolls 2 times, rolled altogether 8 times.Roll and finish latter 2 hours, compound skin temperature is down to below 50 ℃ after testing.
Be 98% through the degree of compaction average of core detection AC-25C type bituminous mixture next day.
Technical characterstic of the present invention is as follows:
(1) compare with existing < < asphalt highway regeneration techniques standard > > (JTG F41-2008), the present invention utilizes the heat energy of the hot-mix asphalt mixture that scene paves, heating cold mixing reclaimed asphalt mixture, not only take full advantage of reclaim asphalt pavement material in old pitch, improved the intensity of reclaimed asphalt mixture.And the moisture in regenerating mixture evaporates rapidly, reached the effect that shortens reclaimed bituminous pavement conditioned time.
(2) compare with patent of invention ZL201010147182.7 " method for heating and rolling of cold plant-mixed recycled asphalt mixtures with emulsion asphalt ", the present invention utilizes the heat energy of the hot-mix asphalt mixture that scene paves, heating cold mixing reclaimed asphalt mixture.Can energy conservation, reduce toxic emission, be conducive to protection of the environment.
From table 1, the present invention utilizes the asphalt pavement regeneration method of hot spice heating cold mixing material obviously to improve the intensity of reclaimed asphalt mixture.Take full advantage of reclaim asphalt pavement material in old pitch, make the regenerating mixture Ratio of split strength of new admixture 1.0% pitch improve 0.30MPa by the cold regeneration mix cleavage strength of new admixture 2.5% pitch of current specifications construction.
The different construction method reclaimed asphalt mixture of table 1 road surface core cleavage strength result of the test
| Construction method | Reclaim old asphalt quality percentage (%) in asphalt pavement material | The mulseal of new admixture accounts for the mass percent (%) that reclaims asphalt pavement material | Core cleavage strength (15 ℃) (MPa) |
| Existing < < asphalt highway regeneration techniques standard > > (JTG F41-2008) construction method | 4.1 | 5.0 | 0.38 |
| Construction method of the present invention | 4.1 | 2.0 | 0.68 |
Claims (4)
1. by the asphalt pavement regeneration method of hot spice heating cold mixing material, it is characterized in that, comprise the following steps:
(1) the lower floor's hot-mix asphalt mixture that paves; Described lower floor's hot-mix asphalt mixture
'spaving thickness is 4cm ~ 15cm; The temperature that paves is 140 ℃ ~ 185 ℃; The speed of paving is 1m/min ~ 3 m/min;
(2) the cold mixing reclaimed asphalt mixture that paves: in 5min, cold mixing reclaimed asphalt mixture paves after lower floor's hot-mix asphalt mixture paves; Paving thickness is 20% ~ 60% of lower floor's hot-mix asphalt mixture paving thickness; The speed that paves of described cold mixing reclaimed asphalt mixture and the lower floor hot-mix asphalt mixture speed that paves is identical;
(3) lower floor's hot-mix asphalt mixture and the disposable roller-compaction of cold mixing reclaimed asphalt mixture: after cold mixing reclaimed asphalt mixture paves, in 3min, on cold mixing reclaimed asphalt mixture surface, roll; Roll to the degree of compaction of cold mixing reclaimed asphalt mixture and lower floor's hot-laid mixture be 95% ~ 100%;
(4) overlying strata hot-mix asphalt mixture paving and rolling
In step (3), rolled the overlying strata hot-mix asphalt mixture that paves in rear 3min, roll to the degree of compaction of overlying strata hot-laid mixture be 95% ~ 100%.
2. asphalt pavement regeneration method according to claim 1, is characterized in that, described in the process of rolling close the watering device of road roller.
3. asphalt pavement regeneration method according to claim 1, is characterized in that, described in to roll be to adopt dual-steel wheel road roller and rubber-tyred roller to combine to roll.
4. asphalt pavement regeneration method according to claim 3, is characterized in that, the total moisture content in described cold mixing reclaimed asphalt mixture is less than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210008272.7A CN102561141B (en) | 2012-01-12 | 2012-01-12 | Asphalt pavement reclamation method using hot mix asphalt mixture to heat cold mix asphalt mixture |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210008272.7A CN102561141B (en) | 2012-01-12 | 2012-01-12 | Asphalt pavement reclamation method using hot mix asphalt mixture to heat cold mix asphalt mixture |
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| CN102561141A CN102561141A (en) | 2012-07-11 |
| CN102561141B true CN102561141B (en) | 2014-09-10 |
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| CN103321119B (en) * | 2013-06-17 | 2016-08-10 | 中铁四局集团有限公司 | Dynamic level ground, skid pad Colophonium continuous rolling paves method |
| CN111827041B (en) * | 2020-07-29 | 2021-12-31 | 重庆交通建设(集团)有限责任公司 | Smoke-inhibiting flame-retardant construction method of environment-friendly modified asphalt |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812825A (en) * | 2010-04-09 | 2010-08-25 | 华南理工大学 | Method for heating and rolling cold plant-mixed recycled asphalt mixtures with emulsion asphalt |
| CN102295436A (en) * | 2011-06-20 | 2011-12-28 | 华南理工大学 | Preparation method of cold-mixing rock asphalt macadam mixture |
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| US8454739B2 (en) * | 2005-09-12 | 2013-06-04 | Alm Holding Co. | Bituminous paving composition and process for bituminous paving |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812825A (en) * | 2010-04-09 | 2010-08-25 | 华南理工大学 | Method for heating and rolling cold plant-mixed recycled asphalt mixtures with emulsion asphalt |
| CN102295436A (en) * | 2011-06-20 | 2011-12-28 | 华南理工大学 | Preparation method of cold-mixing rock asphalt macadam mixture |
Non-Patent Citations (2)
| Title |
|---|
| 沥青混合料的复拌再生与除尘;陈蝶;《筑路机械与施工机械化》;19950228;第15页左栏第2段 * |
| 陈蝶.沥青混合料的复拌再生与除尘.《筑路机械与施工机械化》.1995, |
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