CN102296513A - Thin-layer asphalt pavement overlaid on old cement concrete applicable to coal transportation extra-heavy traffic - Google Patents
Thin-layer asphalt pavement overlaid on old cement concrete applicable to coal transportation extra-heavy traffic Download PDFInfo
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- CN102296513A CN102296513A CN201110115775XA CN201110115775A CN102296513A CN 102296513 A CN102296513 A CN 102296513A CN 201110115775X A CN201110115775X A CN 201110115775XA CN 201110115775 A CN201110115775 A CN 201110115775A CN 102296513 A CN102296513 A CN 102296513A
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Abstract
The invention relates to a thin-layer asphalt pavement overlaid on old cement concrete applicable to coal transportation extra-heavy traffic, a rubber mastic high-elasticity stress absorption band is arranged on a cement concrete slab, an SBS (styrene butadiene styrene) modified macroporous LSAM-25 (large-stone asphalt mixture-25) with the thickness of 6-8mm is arranged on the rubber mastic high-elasticity stress absorption band, an SBS modified slurry seal with the thickness of 1cm is arranged on the SBS modified macroporous LSAM-25, SBS modified AC-13 (azodicarbonamide-13) with the thickness of 4cm is arranged on the SBS modified slurry seal, the SBS modified AC-13, the SBS modified slurry seal, the SBS modified macroporous LSAM-25 and the rubber mastic high-elasticity stress absorption band are connected through SBS modified emulsion adhesive layers, and the range of porosity of the SBS modified macroporous LSAM-25 is 18%-22%. The pavement has excellent carrying capacity, high-temperature stability, good anti-reflection crack effect and long service life, and can meet the demands of coal transportation and other extra-heavy duty traffic.
Description
Technical field
The invention belongs to highway engineering construction and maintenance field, be specifically related to a kind of thin-layer bituminous road surface that is applicable to the old cement concrete overlay of fortune coal very heavy traffic.
Background technology
Sustainable and healthy development along with economy, the communications and transportation cause is rapidly developed, highway transportation presents vehicle multiple-shaftization, the trend of high-efficiency intensifying, because former norm structure is on the weak side, traffic volume forecast is inaccurate, cause the domestic cement concrete pavement of building in early days a large amount of early stage damage or fatigue failure to occur, road surface functional performance decay is accelerated, though pipe is supported unit and is taked to change plate, maintenance measure such as grouting at the bottom of the plate, but because the traffic volume and axle year growth rate are also very fast, it is damaged to cause the road surface to quicken, the application life on road surface is short, and the pressure that maintenance department faces is very big, and construction costs is big.For this reason, a lot of heavily loaded cement concrete pavements all are faced with the overlay transformation of " morning-night ".
The technical barrier that overlays the maximum that faces in the renovation technique at " morning-night " is exactly definite problem of overlay material and Rational structure.China existing " highway cement concrete pavement design specifications " (JTG D40-2002) has done guiding requirement to overlaying bitumen layer thickness on the old cement concrete pavement, but, form the method for designing of the system of maturation because the engineering of domestic old cement concrete pavement Laying Asphalt Surface Course is few or the time of overlay back operation observation is shorter.It is even more serious particularly to overlay the problem of structure for the old cement concrete pavement of the very heavy traffic of the large-scale coaler that mainly travels, the thin-layer bituminous road surface that the old cement concrete that does not still have feasible being suitable for of Technological Economy to transport the coal very heavy traffic at present overlays.
Summary of the invention
Technical problem to be solved by this invention provides a kind of thin-layer bituminous road surface that is applicable to the old cement concrete overlay of fortune coal very heavy traffic, this road surface has good supporting capacity and high-temperature stability, the antireflection crack is effective, service life of road surface is long, can satisfy the demand of extra heavy duty traffic such as fortune coal.
Technical scheme of the present invention: a kind of thin-layer bituminous road surface that is applicable to the old cement concrete overlay of fortune coal very heavy traffic, be provided with the high-elastic stress absorption band of rubber matizhi above the cement concrete slab, being provided with volume above the high-elastic stress absorption band of rubber matizhi is 5%, thickness is the modified macroporous crack LSAM-25 of the SBS of 6～8mm, being provided with thickness above the modified macroporous crack LSAM-25 of SBS is the SBS Modified Slurry Sealing of 1cm, being provided with volume above the SBS Modified Slurry Sealing is 5.5%, thickness is the SBS modification AC-13 of 4cm, SBS modification AC-13 and SBS Modified Slurry Sealing, the porosity ranges that is connected the modified macroporous crack LSAM-25 of SBS by SBS modified emulsifying adhesion coating between the modified macroporous crack LSAM-25 of SBS and the high-elastic stress absorption band of rubber matizhi is 18%～22%.
The present invention compared with prior art has following beneficial effect: (1) adopts the more common volume SBS of SBS modification AC-13 modified bitumen can strengthen the bituminous cements adhesion stress greatly, make bituminous mixture have good high and low temperature stability and anti-fatigue performance simultaneously, thereby reduce the damage that under temperature and weather ambient conditions, brings, have good cracking resistance and water resistance owing to the effect of carrying of heavy traffic, macro-axis.
(2) adopt the modified macroporous crack LSAM-25 of SBS, not only have good supporting capacity and high-temperature stability, can satisfy the demand of extra heavy duty traffic such as fortune coal, prevent the generation of rut.And macroporous structure can block the extensions path of crack tip effectively, reduces the stress concentration phenomenon of seam crossing overlay, delays the upwards speed of expansion of seam crossing reflection crack, therefore has good antireflection crack effect.
(3) high-elastic stress absorption band of rubber matizhi and cement pavement adhesion strength height can increase the possibility that vertical fracture develops to horizontal direction along the interface in the basic unit, thereby delay the time that crack reflection is shown to the road, play good cracking resistance effect.
(4) the SBS modified emulsified asphalt slurry seal not only can adhere to each other securely with the road surface, forms the closely knit paving of one deck, plays the effect of oozing under the moisture of preventing.
(5) total not only can prevent to ooze under the moisture, and guarantees enough supporting capacitys, high-temperature behavior, cryogenic property and anti-fatigue performance.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
The specific embodiment
A kind of thin-layer bituminous road surface that is applicable to the old cement concrete overlay of fortune coal very heavy traffic, be provided with the high-elastic stress absorption band of rubber matizhi above the cement concrete slab, being provided with volume above the high-elastic stress absorption band of rubber matizhi is 5%, thickness is the modified macroporous crack LSAM-25 of the SBS of 6～8mm, being provided with thickness above the modified macroporous crack LSAM-25 of SBS is the SBS Modified Slurry Sealing of 1cm, being provided with volume above the SBS Modified Slurry Sealing is 5.5%, thickness is the SBS modification AC-13 of 4cm, SBS modification AC-13 and SBS Modified Slurry Sealing, the porosity ranges that is connected the modified macroporous crack LSAM-25 of SBS by SBS modified emulsifying adhesion coating between the modified macroporous crack LSAM-25 of SBS and the high-elastic stress absorption band of rubber matizhi is 18%～22%.
Embodiment 1
Article one, cement concrete is adopted on the former road surface of fortune coal main line, because local function cement pavement well damage need carry out " morning-night " and transform.The ratio that medium-and-large-sized lorry is formed in the traffic of this fortune coal main line has accounted for 40%～50%, and carries the investigation discovery by axle, and the design axle of single shaft, twin shaft, three two-wheels carries the legal axle load that all reaches 1.8～2.0 times limits the quantity of.Carry out axle according to flexible pavement and carry conversion, obtain interior 3.5 * 107 times/track of accumulative equivalent axles of design period, track.Adopting following form to add paves: be provided with the high-elastic stress absorption band of rubber matizhi above the cement concrete slab, being provided with volume above the high-elastic stress absorption band of rubber matizhi is 5%, thickness is the modified macroporous crack LSAM-25 of the SBS of 6mm, being provided with thickness above the modified macroporous crack LSAM-25 of SBS is the SBS Modified Slurry Sealing of 1cm, being provided with volume above the SBS Modified Slurry Sealing is 5.5%, thickness is the SBS modification AC-13 of 4cm, SBS modification AC-13 and SBS Modified Slurry Sealing, the porosity ranges that is connected the modified macroporous crack LSAM-25 of SBS by SBS modified emulsifying adhesion coating between the modified macroporous crack LSAM-25 of SBS and the high-elastic stress absorption band of rubber matizhi is 18%, and the SBS Modified Slurry Sealing adopts the ES-3 type.
Embodiment 2
Article one, cement concrete is adopted on the former road surface of fortune coal main line, because local function cement pavement well damage need carry out " morning-night " and transform.The ratio that medium-and-large-sized lorry is formed in the traffic of this fortune coal main line has accounted for 50%～60%, and carries the investigation discovery by axle, and the design axle of single shaft, twin shaft, three two-wheels carries the legal axle load that all reaches 2.0～2.2 times limits the quantity of.Carry out axle according to flexible pavement and carry conversion, obtain interior 9 * 107 times/track of accumulative equivalent axles of design period, track.Adopting following form to add paves: be provided with the high-elastic stress absorption band of rubber matizhi above the cement concrete slab, being provided with volume above the high-elastic stress absorption band of rubber matizhi is 5%, thickness is the modified macroporous crack LSAM-25 of the SBS of 7mm, being provided with thickness above the modified macroporous crack LSAM-25 of SBS is the SBS Modified Slurry Sealing of 1cm, being provided with volume above the SBS Modified Slurry Sealing is 5.5%, thickness is the SBS modification AC-13 of 4cm, SBS modification AC-13 and SBS Modified Slurry Sealing, the porosity ranges that is connected the modified macroporous crack LSAM-25 of SBS by SBS modified emulsifying adhesion coating between the modified macroporous crack LSAM-25 of SBS and the high-elastic stress absorption band of rubber matizhi is 20%, and the SBS Modified Slurry Sealing adopts the ES-3 type.
Embodiment 3
Article one, cement concrete is adopted on the former road surface of fortune coal main line, because local function cement pavement well damage need carry out " morning-night " and transform.The ratio that medium-and-large-sized lorry is formed in the traffic of this fortune coal main line has accounted for 60%～70%, and carries the investigation discovery by axle, and the design axle of single shaft, twin shaft, three two-wheels carries the legal axle load that all reaches 2.2～2.5 times limits the quantity of.Carry out axle according to flexible pavement and carry conversion, obtain interior 2 * 108 times/track of accumulative equivalent axles of design period, track.Adopting following form to add paves: be provided with the high-elastic stress absorption band of rubber matizhi above the cement concrete slab, being provided with volume above the high-elastic stress absorption band of rubber matizhi is 5%, thickness is the modified macroporous crack LSAM-25 of the SBS of 8mm, being provided with thickness above the modified macroporous crack LSAM-25 of SBS is the SBS Modified Slurry Sealing of 1cm, being provided with volume above the SBS Modified Slurry Sealing is 5.5%, thickness is the SBS modification AC-13 of 4cm, SBS modification AC-13 and SBS Modified Slurry Sealing, the porosity ranges that is connected the modified macroporous crack LSAM-25 of SBS by SBS modified emulsifying adhesion coating between the modified macroporous crack LSAM-25 of SBS and the high-elastic stress absorption band of rubber matizhi is 22%, and the SBS Modified Slurry Sealing adopts the ES-3 type.
Claims (1)
1. thin-layer bituminous road surface that the old cement concrete that is applicable to fortune coal very heavy traffic overlays, it is characterized in that being provided with above the cement concrete slab the high-elastic stress absorption band of rubber matizhi, being provided with volume above the high-elastic stress absorption band of rubber matizhi is 5%, thickness is the modified macroporous crack LSAM-25 of the SBS of 6～8mm, being provided with thickness above the modified macroporous crack LSAM-25 of SBS is the SBS Modified Slurry Sealing of 1cm, being provided with volume above the SBS Modified Slurry Sealing is 5.5%, thickness is the SBS modification AC-13 of 4cm, SBS modification AC-13 and SBS Modified Slurry Sealing, the porosity ranges that is connected the modified macroporous crack LSAM-25 of SBS by SBS modified emulsifying adhesion coating between the modified macroporous crack LSAM-25 of SBS and the high-elastic stress absorption band of rubber matizhi is 18%～22%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110115775XA CN102296513A (en) | 2011-05-02 | 2011-05-02 | Thin-layer asphalt pavement overlaid on old cement concrete applicable to coal transportation extra-heavy traffic |
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| CN201110115775XA CN102296513A (en) | 2011-05-02 | 2011-05-02 | Thin-layer asphalt pavement overlaid on old cement concrete applicable to coal transportation extra-heavy traffic |
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| CN102296513A true CN102296513A (en) | 2011-12-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433815A (en) * | 2011-12-31 | 2012-05-02 | 山西省交通科学研究院 | Structure of asphalt pavement applicable to very heavy traffic |
| CN103243626A (en) * | 2013-05-23 | 2013-08-14 | 交通运输部公路科学研究所 | Semi-rigid base bituminous pavement durable structure applicable to heavy traffic |
| CN104074115A (en) * | 2014-07-08 | 2014-10-01 | 山东省交通科学研究所 | Paving structure of heavy-duty traffic road based on high stiffness modulus asphalt mixture |
| CN104562886A (en) * | 2014-10-29 | 2015-04-29 | 南通大学 | Asphalt additional-paving composite structure on old concrete road at urban intersection and additional paving method |
| CN105178132A (en) * | 2015-07-27 | 2015-12-23 | 福州市规划设计研究院 | Method and structure for achieving rigid-soft overlapping joint before pavement paving |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201416136Y (en) * | 2009-05-14 | 2010-03-03 | 山西交科新材料技术有限公司 | Rubber mastic stress absorption band |
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2011
- 2011-05-02 CN CN201110115775XA patent/CN102296513A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201416136Y (en) * | 2009-05-14 | 2010-03-03 | 山西交科新材料技术有限公司 | Rubber mastic stress absorption band |
Non-Patent Citations (1)
| Title |
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| 王跃伟: "重载交通旧水泥混凝土路面加铺改造技术研究", 《山西交通科技》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433815A (en) * | 2011-12-31 | 2012-05-02 | 山西省交通科学研究院 | Structure of asphalt pavement applicable to very heavy traffic |
| CN103243626A (en) * | 2013-05-23 | 2013-08-14 | 交通运输部公路科学研究所 | Semi-rigid base bituminous pavement durable structure applicable to heavy traffic |
| CN103243626B (en) * | 2013-05-23 | 2015-07-29 | 交通运输部公路科学研究所 | A kind of semi-rigid asphalt pavement durable construction being applicable to Heavy Traffic |
| CN104074115A (en) * | 2014-07-08 | 2014-10-01 | 山东省交通科学研究所 | Paving structure of heavy-duty traffic road based on high stiffness modulus asphalt mixture |
| CN104562886A (en) * | 2014-10-29 | 2015-04-29 | 南通大学 | Asphalt additional-paving composite structure on old concrete road at urban intersection and additional paving method |
| CN105178132A (en) * | 2015-07-27 | 2015-12-23 | 福州市规划设计研究院 | Method and structure for achieving rigid-soft overlapping joint before pavement paving |
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Application publication date: 20111228 |