CN215629105U - Low-noise anti-slip thin-layer preventive maintenance asphalt pavement structure - Google Patents
Low-noise anti-slip thin-layer preventive maintenance asphalt pavement structure Download PDFInfo
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- CN215629105U CN215629105U CN202022638058.2U CN202022638058U CN215629105U CN 215629105 U CN215629105 U CN 215629105U CN 202022638058 U CN202022638058 U CN 202022638058U CN 215629105 U CN215629105 U CN 215629105U
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- 239000010426 asphalt Substances 0.000 title claims abstract description 86
- 238000012423 maintenance Methods 0.000 title claims abstract description 20
- 230000003449 preventive effect Effects 0.000 title claims abstract description 16
- 230000001360 synchronised effect Effects 0.000 claims abstract description 55
- 238000005728 strengthening Methods 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims description 49
- 238000005507 spraying Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 14
- 239000012744 reinforcing agent Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 21
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002352 surface water Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000011384 asphalt concrete Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010288 cold spraying Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a low-noise anti-slip thin-layer preventive maintenance asphalt pavement structure, which belongs to the field of asphalt pavement maintenance engineering and comprises the following components in parts by weight: lay first synchronous rubble seal 2 on former road surface structure 1 from bottom to top in proper order, lay second synchronous rubble seal 3 on first synchronous rubble seal 2, spray one deck surface strengthening layer 4 on second synchronous rubble seal 3. The asphalt pavement structure has good bonding performance with the original pavement, high and durable anti-sliding performance, good durability, small thickness of a structural layer, low manufacturing cost, low construction energy consumption, short open traffic time and wide application range, and can well reduce the noise of the pavement.
Description
Technical Field
The utility model belongs to the field of asphalt pavement maintenance engineering, relates to an asphalt pavement structure, and particularly relates to a low-noise anti-skid thin layer suitable for preventive maintenance of asphalt pavements.
Background
The asphalt concrete pavement has the characteristics of good driving comfort, high safety coefficient, strong adaptability, simple repair and the like, and is a main form of various grades of highway pavements in the present stage of China. However, with the continuous accumulation of the service life of the asphalt pavement, under the combined action of traffic load and natural environment, the anti-skid performance index of the pavement is continuously reduced, and great hidden danger is brought to driving safety.
Along with the progress and development of society, the requirements of people on road use functions are gradually increased. The antiskid property of the road surface plays an important role in reducing vehicle collision accidents and personal injuries and deaths, the antiskid property of the road surface is taken as one of key indexes for acceptance of completion of new roads and decision-making of maintenance and repair of the road surface, and especially the safety problems of long and large slope sections, curved slope and inclined road sections and heavy-load and large-flow road sections are paid attention in recent years.
In recent years, some scientific research institutions and construction units in China develop cold-mixed asphalt mixtures or cold spraying represented by micro-surfacing, fog sealing and asphalt recycling on part of expressways and urban trunk roads on the basis of the reference of foreign successful experience, and research and application of preventive maintenance technologies such as hot-mixed asphalt mixtures or hot spraying represented by Noverchip ultra-thin wearing layers, OGFC drainage asphalt concrete covers and gravel sealing layers are successful to a certain extent. However, the cold-mix asphalt mixture or the cold-spraying traditional preventive maintenance technology is influenced by the factors such as material performance, construction level, traffic environment, natural environment and the like, so that the defects of low durability, short average service life of only about 2 years, high noise pollution, low antiskid coefficient and high attenuation speed of the pavement, small process application range and the like are generally existed; the hot-mix asphalt mixture or hot-spray preventive maintenance technology has the advantages of excellent comprehensive performance of the pavement, good durability, average service life of about 3-4 years, generally high manufacturing cost, complex process, high energy consumption and high pollution, and the problems of insufficient height of a road guardrail caused by a direct additional paving process and material waste caused by a milling and re-paving process of a hot-mix asphalt mixture overlay surface. Therefore, new requirements for preventive maintenance of asphalt pavement are being made.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the background art, the utility model aims to provide a low-noise anti-skid thin-layer preventive maintenance asphalt pavement structure, which has good bonding performance with the original pavement, high and durable anti-skid performance, good durability, small thickness of a structural layer, low manufacturing cost, low construction energy consumption, short open traffic time and wide application range, and can well reduce the noise of the pavement.
In order to achieve the technical purpose, the utility model is realized by adopting the following technical scheme.
The utility model provides a preventive maintenance bituminous pavement structure of low noise antiskid thin layer which characterized in that: the method comprises the steps of sequentially paving a first synchronous gravel seal layer (2) on an original pavement structure (1) from bottom to top, paving a second synchronous gravel seal layer (3) on the first synchronous gravel seal layer (2), and spraying a surface strengthening layer (4) on the second synchronous gravel seal layer (3).
Further, the original pavement structure (1) is an original old asphalt pavement structure or a newly-built asphalt pavement structure;
further, the synchronous gravel sealing layer is a pavement structure layer formed by spraying asphalt and then synchronously spreading gravel at intervals of 3-5 seconds by using the same equipment;
furthermore, the macadam in the synchronous macadam seal layer is one of fresh macadam, old asphalt pavement regenerated macadam or mixture of fresh macadam and a small amount of asphalt. The spreading amount of the crushed stone is 4-10 Kg/m2, the upper limit is taken when the particle size of the crushed stone is large, and the lower limit is taken when the particle size of the crushed stone is small;
further, the sprayed asphalt in the first synchronous chip seal layer (2) is one of SBS modified asphalt, rubber asphalt and high-viscosity modified emulsified asphalt. The spraying amount of the asphalt is 0.5-1.5 Kg/m2, the upper limit is taken when the particle size of the crushed stone is large, and the lower limit is taken when the particle size of the crushed stone is small;
furthermore, the gravel in the first synchronous gravel seal layer (2) is one of single particle sizes of 1.18-2.36 mm, 2.36-4.75mm and 4.75-9.5 mm;
further, the sprayed asphalt in the second synchronous chip seal layer (3) is high-viscosity modified emulsified asphalt, the spraying amount of the asphalt is 0.4-1.0 Kg/m2, the upper limit is set when the particle size of the chips is large, and the lower limit is set when the particle size of the chips is small;
furthermore, the crushed stone in the second synchronous crushed stone sealing layer (3) has one of single grain size of 0.6-1.18 mm, 1.18-2.36 mm and 2.36-4.75 mm;
furthermore, the particle size of the crushed stone in the second synchronous crushed stone seal layer (3) is smaller than that of the crushed stone in the first synchronous crushed stone seal layer (2) by one size fraction;
further, the surface strengthening layer (4) is formed by spraying a surface strengthening agent with the dosage of 0.3-0.6 Kg/m 2;
further, the surface hardening agent in the surface hardening layer (4) is characterized in that the softening point is not lower than 80 ℃.
Further, the performance indexes of the low-noise anti-skid thin layer meet the following requirements: the whole thickness is not more than 10mm, the road surface friction coefficient is not less than 60BPN after 1 month, the road surface friction coefficient is not less than 56BPN after 24 months, the road surface structure depth is not less than 0.6mm, the road surface water permeability coefficient is not more than 10ml/min, and the driving noise in the vehicle is not more than 68 dB.
Through the technical scheme, compared with the prior art, the utility model has the advantages that:
(1) the thickness of the low-noise anti-skid thin layer is less than 10mm, and when the anti-skid performance of the asphalt pavement is recovered, on one hand, the original pavement structure layer is not required to be milled, so that the construction cost can be greatly reduced, and the construction progress is accelerated; on the other hand, the thickness is thin, the load is small, and the method is more suitable for bridge decks and tunnel pavements limited by elevations and additional loads;
(2) the road surface structure with the upper and lower layers of synchronous broken stones mutually embedded and squeezed can provide continuous and stable anti-slip coefficient for road surface running; the three waterproof structure layers can greatly reduce the damage of rainwater to the original pavement structure layer and prolong the service life of the pavement;
(3) the main construction process of the low-noise anti-slip thin layer is synchronous chip sealing, the technical maturity is high, the construction is convenient, large pavement maintenance equipment is not needed, the construction energy consumption is low, and the open traffic time is short;
(4) the SBS modified asphalt, the rubber asphalt and the high-viscosity modified emulsified asphalt have good cohesive force, and can effectively prevent the low-noise anti-slip thin layer from falling off from the original pavement;
(5) the synchronous rubble seal of upper strata has filled the clearance between the rubble of lower floor, can improve the roughness on road surface on the one hand, and on the other hand has reduced the noise on road surface by a wide margin.
Drawings
FIG. 1 is a schematic cross-sectional view of a low-noise anti-slip thin layer preventive maintenance asphalt pavement structure according to the present invention.
Wherein: 1-is former road surface structure, 2-is first synchronous chip seal (2), 3-is second synchronous chip seal (3), 4-is surface strengthening layer (4).
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to the attached figure 1, the low-noise anti-slip thin-layer preventive maintenance asphalt pavement structure comprises a first synchronous chip seal layer (2), a second synchronous chip seal layer (3) and a surface strengthening layer (4). A first synchronous gravel seal layer (2) is laid on an original pavement structure (1) from bottom to top, a second synchronous gravel seal layer (3) is laid, and a surface strengthening layer (4) is laid at last.
Further, the original pavement structure (1) is an expressway asphalt pavement which is 8 years old and is communicated with a vehicle in Jiangsu province, and pavement diseases mainly mean that the anti-skid performance does not meet the requirement;
furthermore, the sprayed asphalt in the first synchronous chip seal layer (2) is SBS modified asphalt, the spraying amount is 0.8Kg/m2, and the performance index of the SBS modified asphalt meets the requirements of technical Specification for road asphalt pavement construction (JTGF 40-2004);
furthermore, the scattered crushed stones in the first synchronous crushed stone sealing layer (2) are fresh basalt crushed stones with single grain diameter of 2.36-4.75mm, the consumption of the crushed stones is 8Kg/m2, and the performance indexes of the crushed stones meet the requirements of technical Specification for construction of asphalt pavements for roads (JTGF 40-2004);
further, the sprayed asphalt in the second synchronous chip seal layer (3) is high-viscosity modified emulsified asphalt, the spraying amount is 0.6Kg/m2, and the performance index of the high-viscosity modified emulsified asphalt meets the requirements of technical Specification for road asphalt pavement construction (JTGF 40-2004);
furthermore, the scattered gravels in the second synchronous gravel sealing layer (3) are old asphalt pavement recycled gravels with single particle size of 1.18-2.36 mm, the content of residual asphalt in the old asphalt pavement recycled gravels is 1.5%, and the using amount of the gravels is 6Kg/m2The performance index of the crushed stone meets the requirements of technical Specification for construction of asphalt road surfaces of roads (JTGF 40-2004);
further, the surface reinforcing agent in the surface reinforcing layer (4) is provided by Jiangsu Tiannuo road material science and technology company, the softening point of the surface reinforcing agent is 86 ℃, and the spraying amount is 0.4Kg/m2；
The practice shows that the low-noise anti-skid thin layer detection result of the utility model is as follows: the whole thickness is 6mm, the road surface friction coefficient is 70BPN after 1 month of traffic, the road surface friction coefficient is 64BPN after 24 months, the road surface structure depth is 0.9mm, the road surface water seepage coefficient is 0mL/min, and the driving noise in the vehicle is 65 dB.
Example 2
Referring to the attached figure 1, the low-noise anti-slip thin-layer preventive maintenance asphalt pavement structure comprises a first synchronous chip seal layer (2), a second synchronous chip seal layer (3) and a surface strengthening layer (4). A first synchronous gravel seal layer (2) is laid on an original pavement structure (1) from bottom to top, a second synchronous gravel seal layer (3) is laid, and a surface strengthening layer (4) is laid at last.
Further, the original pavement structure (1) is an asphalt pavement of a newly-built highway in Jiangsu province;
further, the sprayed asphalt in the first synchronous chip seal layer (2) is rubber asphalt, and the spraying amount is 1.5Kg/m2The performance index of the rubber asphalt meets the requirements of technical Specifications for wet rubber asphalt pavement construction (DB 32/T2286-2012);
further, the scattered crushed stones in the first synchronous crushed stone sealing layer (2) are prepared by mixing fresh basalt crushed stones with single grain diameter of 4.75-9.5mm and AH-70 asphalt with the oil stone ratio of 0.3%, and the amount of the crushed stones is 10Kg/m2The performance index of the crushed stone meets the requirements of technical Specification for construction of asphalt road surfaces of roads (JTGF 40-2004);
further, the sprayed asphalt in the second synchronous chip seal layer (3) is high-viscosity modified emulsified asphalt, and the spraying amount is 1.0Kg/m2The performance index of the high-viscosity modified emulsified asphalt meets the requirements of technical Specification for construction of road asphalt pavements (JTGF 40-2004);
furthermore, the scattered gravels in the second synchronous gravels sealing layer (3) are fresh diabase gravels with single grain size of 4.75-9.5mm, and the using amount of the gravels is 8Kg/m2The performance index of the crushed stone meets the requirements of technical Specification for construction of asphalt road surfaces of roads (JTGF 40-2004);
further, the surface reinforcing agent in the surface reinforcing layer (4) is provided by Jiangsu Tiannuo road material science and technology company, the softening point of the surface reinforcing agent is 84 ℃, and the spraying amount is 0.6Kg/m2；
The practice shows that the low-noise anti-skid thin layer detection result of the utility model is as follows: the whole thickness is 9.5mm, the road surface friction coefficient is 74BPN after 1 month of traffic, the road surface friction coefficient is 66BPN after 24 months, the road surface structure depth is 1.1mm, the road surface water seepage coefficient is 6mL/min, and the driving noise in the vehicle is 67 dB.
Example 3
Referring to the attached figure 1, the low-noise anti-slip thin-layer preventive maintenance asphalt pavement structure comprises a first synchronous chip seal layer (2), a second synchronous chip seal layer (3) and a surface strengthening layer (4). A first synchronous gravel seal layer (2) is laid on an original pavement structure (1) from bottom to top, a second synchronous gravel seal layer (3) is laid, and a surface strengthening layer (4) is laid at last.
Further, the original pavement structure (1) is a municipal asphalt pavement which is 6 years old and is communicated with a vehicle in Jiangsu province;
further, the sprayed asphalt in the first synchronous chip seal layer (2) is high-viscosity modified emulsified asphalt, and the spraying amount is 0.5Kg/m2The performance index of the high-viscosity modified emulsified asphalt meets the requirements of technical Specification for construction of road asphalt pavements (JTGF 40-2004);
further, the scattered crushed stones in the first synchronous crushed stone sealing layer (2) are fresh basalt crushed stones with single particle size of 2.36-4.75mm, and the amount of the crushed stones is 7Kg/m2The performance index of the crushed stone meets the requirements of technical Specification for construction of asphalt road surfaces of roads (JTG F40-2004);
further, the sprayed asphalt in the second synchronous chip seal layer (3) is high-viscosity modified emulsified asphalt, and the spraying amount is 0.4Kg/m2The performance index of the high-viscosity modified emulsified asphalt meets the requirements of technical Specification for construction of road asphalt pavements (JTGF 40-2004);
furthermore, the scattered crushed stones in the second synchronous crushed stone sealing layer (3) are fresh basalt crushed stones with single particle size of 0.6-1.18 mm, and the amount of the crushed stones is 4Kg/m2The performance index of the crushed stone meets the requirements of technical Specification for construction of asphalt road surfaces of roads (JTGF 40-2004);
further, the surface reinforcing agent in the surface reinforcing layer (4) is provided by Jiangsu Tiannuo road material science and technology company, the softening point of the surface reinforcing agent is 90 ℃, and the spraying amount is 0.3Kg/m2。
The practice shows that the low-noise anti-skid thin layer detection result of the utility model is as follows: the whole thickness is 3mm, the road surface friction coefficient is 66BPN after 1 month of traffic, the road surface friction coefficient is 60BPN after 24 months of traffic, the road surface structure depth is 0.65mm, the road surface water seepage coefficient is 0mL/min, and the driving noise in the vehicle is 65 dB.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. The utility model provides a preventive maintenance bituminous pavement structure of low noise antiskid thin layer which characterized in that: sequentially paving a first synchronous crushed stone seal layer (2) on the original pavement structure (1) from bottom to top, paving a second synchronous crushed stone seal layer (3) on the first synchronous crushed stone seal layer (2), and spraying a surface strengthening layer (4) on the second synchronous crushed stone seal layer (3);
the original pavement structure (1) is an original old asphalt pavement structure or a newly-built asphalt pavement structure;
the gravel in the first synchronous gravel seal layer (2) is one of single particle sizes of 1.18-2.36 mm, 2.36-4.75mm and 4.75-9.5 mm;
the sprayed asphalt in the first synchronous chip seal (2) is one of SBS modified asphalt, rubber asphalt and high-viscosity modified emulsified asphalt; the spraying amount of the asphalt is 0.5 to 1.5Kg/m2Taking the upper limit when the particle size of the crushed stone is large, and taking the lower limit when the particle size of the crushed stone is small; the crushed stone in the second synchronous crushed stone sealing layer (3) has one of single grain sizes of 0.6-1.18 mm, 1.18-2.36 mm and 2.36-4.75 mm;
the sprayed asphalt in the second synchronous chip seal (3) is high-viscosity modified emulsified asphalt, and the spraying amount of the asphalt is 0.4-1.0 Kg/m2Taking the upper limit when the particle size of the crushed stone is large, and taking the lower limit when the particle size of the crushed stone is small;
and the particle size of the crushed stones in the second synchronous crushed stone sealing layer (3) is one size fraction smaller than that of the crushed stones in the first synchronous crushed stone sealing layer (2).
2. The asphalt pavement structure with low noise, skid resistance and preventive maintenance of thin layer as claimed in claim 1, wherein the softening point of the surface reinforcing agent used in the surface reinforcing layer (4) is not lower than 80 ℃ and the spraying amount is 0.3-0.6 Kg/m2。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940599A (en) * | 2022-05-24 | 2022-08-26 | 上海缤德新材料科技有限公司 | Leaching-attachable ultrathin noise reduction gravel seal coat and construction method thereof |
| CN115287962A (en) * | 2022-08-30 | 2022-11-04 | 太原市路邦科技有限公司 | Low rolling resistance pavement sealing layer for reducing tire-road rolling resistance and preparation method thereof |
| CN115354546A (en) * | 2022-08-30 | 2022-11-18 | 太原市路邦科技有限公司 | Thin-layer low rolling resistance pavement and preparation method thereof |
-
2020
- 2020-11-13 CN CN202022638058.2U patent/CN215629105U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940599A (en) * | 2022-05-24 | 2022-08-26 | 上海缤德新材料科技有限公司 | Leaching-attachable ultrathin noise reduction gravel seal coat and construction method thereof |
| CN115287962A (en) * | 2022-08-30 | 2022-11-04 | 太原市路邦科技有限公司 | Low rolling resistance pavement sealing layer for reducing tire-road rolling resistance and preparation method thereof |
| CN115354546A (en) * | 2022-08-30 | 2022-11-18 | 太原市路邦科技有限公司 | Thin-layer low rolling resistance pavement and preparation method thereof |
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Address after: 528305, 5th Floor, 502-2-6, Building 1, Shengyue Garden, No. 33 Shunye East Road, Xingtan Town, Shunde District, Foshan City, Guangdong Province (Address Declaration) Patentee after: Fojiaoke Tiannuo (Foshan) Technology Development Co.,Ltd. Country or region after: Zhong Guo Address before: Building 2, No. 5 Pengshan Road, Hecheng Street, Gaoming District, Foshan City, Guangdong Province, 528599 Patentee before: Foshan Yanke Technology Co.,Ltd. Country or region before: Zhong Guo |
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