CN111058357A - Cold recycling construction method for foamed asphalt of pavement - Google Patents
Cold recycling construction method for foamed asphalt of pavement Download PDFInfo
- Publication number
- CN111058357A CN111058357A CN202010035946.7A CN202010035946A CN111058357A CN 111058357 A CN111058357 A CN 111058357A CN 202010035946 A CN202010035946 A CN 202010035946A CN 111058357 A CN111058357 A CN 111058357A
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- Prior art keywords
- asphalt
- road surface
- compaction
- old
- old asphalt
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Road Repair (AREA)
Abstract
The invention relates to the technical field of pavement construction, in particular to a foamed asphalt cold recycling construction method for a pavement, which solves the defect of low recovery rate of old asphalt materials in the prior art and comprises the following steps: s1, traffic is closed; s2, cleaning a road surface, positioning construction equipment and measuring a road surface; s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment; s4, processing the old asphalt material and crushing; s5, mixing the foamed asphalt, the old asphalt particles and the additive to obtain a regenerated asphalt mixture; s6, paving the recycled asphalt mixture, and completing construction through initial pressing, re-pressing and final pressing. The invention crushes the old asphalt material, and adds foam asphalt, aggregate, filler and other additives into the old asphalt material particles, which can improve the cohesiveness and stability of the asphalt, is suitable for cold regeneration and improves the recovery rate of the old asphalt material.
Description
Technical Field
The invention relates to the technical field of pavement construction, in particular to a foamed asphalt cold recycling construction method for a pavement.
Background
In the course of road construction, the consumption of bitumen is great, and every year road renovation also consumes a large amount of bitumen. In the road renovation process, the recovery rate of the old asphalt material is low and great waste is caused due to the problems of high melting temperature, serious aging, high viscosity and the like of the old asphalt material, the foamed asphalt is a new material which is formed by adding water drops into high-temperature asphalt to form steam bubbles, generates chain reaction and obviously improves the bonding performance, the cohesiveness is strong and stable, and the mixture can be stored for a long time and can be cold rolled.
Therefore, we propose a construction method for cold recycling foamed asphalt for road surface to solve the above problems.
Disclosure of Invention
The invention aims to solve the defect of low recovery rate of old asphalt materials in the prior art, and provides a cold recycling construction method of foamed asphalt for a pavement.
A cold recycling construction method for foamed asphalt of a pavement comprises the following steps:
s1, traffic is closed;
s2, cleaning a road surface, positioning construction equipment and measuring a road surface;
s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment;
s4, crushing the old asphalt material by a crusher to obtain old asphalt material particles;
s5, mixing and stirring the foamed asphalt, the old asphalt particles, the aggregate and the filler to obtain a regenerated asphalt mixture;
wherein the weight parts of the raw materials are as follows: 15-25 parts of foamed asphalt, 45-60 parts of old asphalt particles, 40-55 parts of aggregate and 5-10 parts of filler.
And S6, paving the recycled asphalt mixture on the road surface, and completing construction through initial pressing, re-pressing and final pressing.
Preferably, the particle size of the old asphalt material particles meets the corresponding grading.
Preferably, the mixing temperature is 45 ℃ to 60 ℃.
Preferably, the filler is one or more of talcum powder, silica powder, limestone powder and fly ash.
Preferably, the initial pressing is performed by static pressing on the road surface once by using a double-steel-wheel road roller with the self weight of more than 10t, and then the road surface is vibrated and pressed once in a high-frequency low-amplitude mode, the rolling speed is 1.8km/h, the re-pressing is performed by using a double-steel-wheel vibratory road roller with the self weight of more than 18t, the low-frequency high-amplitude vibration pressing is performed for 3 times, the rolling speed is 2.2km/h, the final pressing is performed by using a tire road roller with the self weight of more than 26t for 8 times, and the rolling speed is 2.5-2.8 km/h.
The invention has the beneficial effects that:
the invention crushes the old asphalt material, and adds foam asphalt, aggregate, filler and other additives into the old asphalt material particles, which can improve the cohesiveness and stability of the asphalt, is suitable for cold regeneration and improves the recovery rate of the old asphalt material.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
The first embodiment is as follows:
a cold recycling construction method for foamed asphalt of a pavement comprises the following steps:
s1, traffic is closed;
s2, cleaning a road surface, positioning construction equipment and measuring a road surface;
s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment;
s4, crushing the old asphalt material by a crusher to obtain old asphalt material particles;
s5, mixing and stirring the foamed asphalt, the old asphalt particles, the aggregate and the filler to obtain a regenerated asphalt mixture;
wherein the weight parts of the raw materials are as follows: 15 parts of foamed asphalt, 60 parts of old asphalt particles, 40 parts of aggregate and 5 parts of filler.
And S6, paving the recycled asphalt mixture on the road surface, and completing construction through initial pressing, re-pressing and final pressing.
In the embodiment, the granularity of old asphalt material particles meets corresponding gradation, the mixing temperature is between 45 ℃ and 60 ℃, the filler is fly ash, the primary pressing is static pressing on the road surface by a double-steel-wheel road roller with the dead weight of more than 10t, then the high-frequency and low-amplitude vibration pressing is performed for one time, the rolling speed is 1.8km/h, the secondary pressing is rolling by a double-steel-wheel vibration road roller with the dead weight of more than 18t, the low-frequency and high-amplitude vibration pressing is performed for 3 times, the rolling speed is 2.2km/h, the final pressing is rolling for 8 times by a tire road roller with the dead weight of more than 26t, and the rolling speed is between 2.5 km/h and 2.8 km/h.
Example two:
a cold recycling construction method for foamed asphalt of a pavement comprises the following steps:
s1, traffic is closed;
s2, cleaning a road surface, positioning construction equipment and measuring a road surface;
s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment;
s4, crushing the old asphalt material by a crusher to obtain old asphalt material particles;
s5, mixing and stirring the foamed asphalt, the old asphalt particles, the aggregate and the filler to obtain a regenerated asphalt mixture;
wherein the weight parts of the raw materials are as follows: 20 parts of foamed asphalt, 55 parts of old asphalt particles, 50 parts of aggregate and 8 parts of filler.
And S6, paving the recycled asphalt mixture on the road surface, and completing construction through initial pressing, re-pressing and final pressing.
In the embodiment, the granularity of old asphalt material particles meets corresponding gradation, the mixing temperature is between 45 ℃ and 60 ℃, the filler is talcum powder, the primary pressing is realized by carrying out static pressure once on the road surface by adopting a double-steel-wheel road roller with the dead weight of more than 10t, then carrying out vibration pressing once in a high-frequency low-amplitude mode, the rolling speed is 1.8km/h, the secondary pressing is realized by carrying out rolling by adopting a double-steel-wheel vibration road roller with the dead weight of more than 18t, the low-frequency high-amplitude vibration pressing is 3 times, the rolling speed is 2.2km/h, the final pressing is realized by carrying out rolling for 8 times by adopting a tyre road roller with the dead weight of more than 26t, and the rolling speed is between 2.5 km.
Example three:
a cold recycling construction method for foamed asphalt of a pavement comprises the following steps:
s1, traffic is closed;
s2, cleaning a road surface, positioning construction equipment and measuring a road surface;
s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment;
s4, crushing the old asphalt material by a crusher to obtain old asphalt material particles;
s5, mixing and stirring the foamed asphalt, the old asphalt particles, the aggregate and the filler to obtain a regenerated asphalt mixture;
wherein the weight parts of the raw materials are as follows: 18 parts of foamed asphalt, 50 parts of old asphalt particles, 45 parts of aggregate and 8 parts of filler.
And S6, paving the recycled asphalt mixture on the road surface, and completing construction through initial pressing, re-pressing and final pressing.
In the embodiment, the granularity of old asphalt material particles meets corresponding gradation, the mixing temperature is between 45 ℃ and 60 ℃, the filler is silica powder, the initial pressing is realized by static pressing once on the road surface by adopting a double-steel-wheel road roller with the dead weight of more than 10t, then the vibration pressing is realized once in a high-frequency low-amplitude mode, the rolling speed is 1.8km/h, the re-pressing is realized by adopting a double-steel-wheel vibration road roller with the dead weight of more than 18t, the low-frequency high-amplitude vibration pressing is 3 times, the rolling speed is 2.2km/h, the final pressing is realized by adopting a tire road roller with the dead weight of more than 26t, and the rolling speed is between 2.5 km/h and 2.8 km/h.
Example four:
a cold recycling construction method for foamed asphalt of a pavement comprises the following steps:
s1, traffic is closed;
s2, cleaning a road surface, positioning construction equipment and measuring a road surface;
s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment;
s4, crushing the old asphalt material by a crusher to obtain old asphalt material particles;
s5, mixing and stirring the foamed asphalt, the old asphalt particles, the aggregate and the filler to obtain a regenerated asphalt mixture;
wherein the weight parts of the raw materials are as follows: 25 parts of foamed asphalt, 45 parts of old asphalt particles, 55 parts of aggregate and 10 parts of filler.
And S6, paving the recycled asphalt mixture on the road surface, and completing construction through initial pressing, re-pressing and final pressing.
In the embodiment, the granularity of old asphalt material particles meets corresponding gradation, the mixing temperature is between 45 ℃ and 60 ℃, the filler is limestone powder, the primary pressure is static pressure once on the road surface by adopting a double-steel-wheel road roller with the dead weight of more than 10t, then the high-frequency low-amplitude mode is used for vibration and compression once, the rolling speed is 1.8km/h, the secondary pressure is rolling by adopting a double-steel-wheel vibration road roller with the dead weight of more than 18t, the low-frequency high-amplitude vibration and compression are respectively 3 times, the rolling speed is 2.2km/h, the final pressure is rolling for 8 times by adopting a tire road roller with the dead weight of more than 26t, and the rolling speed is between 2.5 km/h and 2.8 km/h.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A construction method for cold recycling of foamed asphalt on a pavement is characterized by comprising the following steps:
s1, traffic is closed;
s2, cleaning a road surface, positioning construction equipment and measuring a road surface;
s3, milling the original pavement to the surface of the base layer, recovering the old asphalt material, and performing lower bearing layer cleaning, deflection detection and disease treatment;
s4, crushing the old asphalt material by a crusher to obtain old asphalt material particles;
s5, mixing and stirring the foamed asphalt, the old asphalt particles, the aggregate and the filler to obtain a regenerated asphalt mixture;
wherein the weight parts of the raw materials are as follows: 15-25 parts of foamed asphalt, 45-60 parts of old asphalt particles, 40-55 parts of aggregate and 5-10 parts of filler;
and S6, paving the recycled asphalt mixture on the road surface, and completing construction through initial pressing, re-pressing and final pressing.
2. The construction method of claim 1, wherein the particle size of the old asphalt particles satisfies the corresponding gradation.
3. The cold recycling construction method of foamed asphalt for road surface according to claim 1, wherein the mixing temperature is 45 ℃ to 60 ℃.
4. The cold recycling construction method of foamed asphalt for road surface according to claim 1, wherein the filler is one or more of talcum powder, silica powder, limestone powder and fly ash.
5. The foamed asphalt cold recycling construction method for the road surface according to claim 1, characterized in that the primary compaction is a static compaction on the road surface by a double-steel-wheel roller with a dead weight of more than 10t, and then the compaction is a high-frequency and low-amplitude mode, the compaction speed is 1.8km/h, the secondary compaction is a compaction by a double-steel-wheel vibratory roller with a dead weight of more than 18t, the low-frequency and high-amplitude vibration compaction is 3 times, the compaction speed is 2.2km/h, the final compaction is a compaction by a tyre roller with a dead weight of more than 26t for 8 times, and the compaction speed is 2.5-2.8 km/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010035946.7A CN111058357A (en) | 2020-01-14 | 2020-01-14 | Cold recycling construction method for foamed asphalt of pavement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010035946.7A CN111058357A (en) | 2020-01-14 | 2020-01-14 | Cold recycling construction method for foamed asphalt of pavement |
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| CN111058357A true CN111058357A (en) | 2020-04-24 |
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| CN202010035946.7A Pending CN111058357A (en) | 2020-01-14 | 2020-01-14 | Cold recycling construction method for foamed asphalt of pavement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501485A (en) * | 2020-04-28 | 2020-08-07 | 广东德泽建设工程有限公司 | In-situ cold regeneration modification method for foamed asphalt combined pavement with cementation sealing layer |
| CN111636282A (en) * | 2020-07-13 | 2020-09-08 | 长安大学 | Method for implementing pavement maintenance based on in-situ softening technology of pavement semi-rigid base |
| CN113774768A (en) * | 2021-09-16 | 2021-12-10 | 嘉兴市天坤营造工程设计有限公司 | Method and equipment for engineering construction |
| CN116116868A (en) * | 2022-11-02 | 2023-05-16 | 陈丽莉 | Foamed asphalt recycling system and recycling method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501485A (en) * | 2020-04-28 | 2020-08-07 | 广东德泽建设工程有限公司 | In-situ cold regeneration modification method for foamed asphalt combined pavement with cementation sealing layer |
| CN111501485B (en) * | 2020-04-28 | 2021-06-25 | 广东德泽建设工程有限公司 | In-situ cold regeneration modification method for foamed asphalt combined pavement with cementation sealing layer |
| CN111636282A (en) * | 2020-07-13 | 2020-09-08 | 长安大学 | Method for implementing pavement maintenance based on in-situ softening technology of pavement semi-rigid base |
| CN113774768A (en) * | 2021-09-16 | 2021-12-10 | 嘉兴市天坤营造工程设计有限公司 | Method and equipment for engineering construction |
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| CN116116868A (en) * | 2022-11-02 | 2023-05-16 | 陈丽莉 | Foamed asphalt recycling system and recycling method |
| CN116116868B (en) * | 2022-11-02 | 2024-12-27 | 华胜新能源贸易(东营)有限公司 | Foamed asphalt recycling system and recycling method |
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