CN104343067B - A kind of Heavy Traffic Long Life Asphalt Pavement - Google Patents
A kind of Heavy Traffic Long Life Asphalt Pavement Download PDFInfo
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- CN104343067B CN104343067B CN201310331039.7A CN201310331039A CN104343067B CN 104343067 B CN104343067 B CN 104343067B CN 201310331039 A CN201310331039 A CN 201310331039A CN 104343067 B CN104343067 B CN 104343067B
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- asphalt
- modulus
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- additive
- heavy traffic
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention relates to a kind of Heavy Traffic Long Life Asphalt Pavements, deck structure from top to bottom is that base's cement stabilized macadam is gone to a grassroots level bed course roadbed on face layer high-modulus asphalt concrete cutting optimal Asphalt Stabilized Macadam in upper layer, the high-modulus asphalt concrete cutting optimal is made of the bituminous concrete of addition high-modulus additive, and thickness is not less than 8cm.The thickness of cement stabilized macadam is not less than 30cm, cement dose 3.5%.Roadbed is handled by reinforcement, and the modulus of resilience is not less than 35MPa.The pavement structure that the present invention designs has many advantages, such as that good intensity height, bearing capacity, Rut resistance, anti-fatigue performance are good, significantly improves the performance of heavy-load road, and reduce road Life Cycle Cost.The present invention is a kind of to carry that Heavy Traffic, anti-rut behavior are good, service life is long, are suitable for the pavement structure that warmer climate area uses.
Description
Technical field
The present invention relates to road engineerings, and in particular to arrives a kind of Heavy Traffic Long Life Asphalt Pavement.
Background technology
With the continuous improvement of economic level with the fast development of highway transportation, vehicle in communications and transportation to it is large-scale,
Heavily loaded aspect development, and District of Shanghai belongs to Soft Soil Ground And Foundation, the harm bigger of super-heavy load.
Long Life Asphalt Pavement is widely accepted as a design concept, becomes the world in the world in recent years
The research topic of Research on Bituminous Pavement mechanism of various countries and production unit hot topic the most.The U.S., Europe, Canada even South Africa all exist
It is studied extensively.In terms of pavement structure development trend, Long Life Asphalt Pavement will become the following most important pavement structure, special
Be not highway, Heavy Traffic road in.
The track investigation of early stage shows the rutting deformation of bituminous paving essentially from upper layer, and currently occur in, under
The phenomenon that face layer is main.Bituminous paving occurs in, there are many reason that cutting optimal track ratio is increased, high temperature, heavy duty, middle face
Layer and cutting optimal material property design Shortcomings etc. are possible to.The regions 10cm ~ 15cm are high stress areas under wheel load, and
The generation area of various damages should select the material with high intensity and good anti-rut behavior, high-modulus asphalt concrete
Application precisely in order to improving the rutting resistance on road surface by the modulus for improving asphalt.
From the point of view of the practical exploration of countries in the world high-grade highway Long Life Asphalt Pavement, it is with Asphalt Pavement with Flexible Base
Main, Combined base pavement structure, rigid base's pavement structure, Pavement on Semi-rigid Type Base structure etc. are auxiliary.Sub-surface is wanted
It asks higher, generally makees the upper layer of base with Asphalt Stabilized Macadam, and make binder with pitch.The overall thickness of bituminous texture layer is big
In 20cm.The investigation of the performance of Long Life Pavement is shown when thickness of bituminous surface is more than 18cm both at home and abroad, track rate
It can be substantially reduced.For thick asphalt surface course road, track occurs mainly in pitch layer surface, and track at this time does not indicate that road
Overall structure is destroyed, it is only necessary to carry out milling making again to superficial layer in repair.Using flexbile base with it is semi-rigid
Base of the method that base is combined as Long Life Asphalt Pavement is a kind of preferable combining form, you can to play flexibility
The anti-fatigue performance of base, and the high intensity and stability of semi-rigid type base can be utilized, improve the anti-permanent change of bituminous paving
Shape ability.
Invention content
The purpose of the present invention is to provide a kind of Heavy Traffic Long Life Asphalt Pavements.
To achieve the goals above, technical scheme is as follows：A kind of Heavy Traffic Long Life Asphalt Pavement, it is special
Sign be the deck structure of the Long Life Asphalt Pavement from top to bottom be upper layer, middle face layer, cutting optimal, upper base, go to a grassroots level,
Bed course, roadbed, the high-modulus asphalt concrete cutting optimal are made of the bituminous concrete of addition high-modulus additive, and thickness is not
Less than 8cm.The high-modulus additive is made of PE, butadiene-styrene rubber, polyethylene wax, anti-aging components, plasticizing component etc., wherein
PE, butadiene-styrene rubber, polyethylene wax, anti-aging components, plasticizing component=100:10-30：15-30：2-6：5-15.
Upper base and a coating emulsified asphalt permeable layers are set between going to a grassroots level, are reinforced viscous between bitumen layer and water stability detritus
Knot, keeps the continuity of pavement structure.
Bituminous paving association of the U.S. defines, and Long Life Asphalt Pavement refers to design life up to 50 years or more asphalt roads
Face, the repair and reconstruction of amorphousness in design life, it is only necessary to periodically be repaiied according to superficial layer deterioration extent
It is multiple.
According to Design Concept of Long Life Asphalt Pavement, the ranging from high force area of top course top thickness 15cm, Ying Cai
With the high performance asphalt of high quality.Upper layer is modified SMA-13 using SBS, and middle face layer is modified SMA-16 using SBS, under
Face layer has to be larger than 18cm using the HMAC-20 for adding high-modulus additive, face layer overall thickness.Base uses 30 on asphalt macadam
The ATB-25 of number pitch, thickness are not less than 15cm.The cement that cement stabilized macadam uses is 42.5 class g cement, dosage 3.5%, thick
Degree is not less than 30cm.In order to reduce the undesirable influence of hydrogeologic condition, the sand of cement stabilized macadam base following settings 15cm
Gravel bed course.Consider the influence of soft soil foundation, certain reinforcement processing should be carried out to roadbed, improve the intensity of roadbed filling, played steady
The effects that fixed, draining, further dispersive stress.
Based on above-mentioned theory, Heavy Traffic Perpetual Pavements Structural of the invention, deck structure from top to bottom is
Base-water stability detritus is gone to a grassroots level-Base with Sand Gravel Cushion-on the middle face layer-high-modulus asphalt concrete cutting optimal-asphalt macadam of upper layer-
Roadbed.Wherein, cutting optimal is made of the additive agent modified high-modulus asphalt concrete of high-modulus.
Accordingly, the service life for improving bituminous paving under Heavy Traffic has been reached, has realized and improve pitch under Heavy Traffic
The anti-rut behavior on road surface, and extend the purpose of bituminous paving service life.
Specific implementation mode
The Heavy Traffic Perpetual Pavements Structural of the present invention, deck structure from top to bottom is the middle face layer-of upper layer-
Base-goes to a grassroots level-bed course-roadbed on high-modulus asphalt concrete cutting optimal-asphalt macadam.
Wherein, upper layer is by SMA-13, SBS modified pitch（Meet the material performance requirement of PG76-22）Concrete material
It constitutes；
Middle face layer is by SMA-16, SBS modified pitch（Meet the material performance requirement of PG76-22）Concrete is constituted；
Cutting optimal adds high-modulus additive by HMAC-20（Matrix pitch is high-quality No. 70 pitch）Concrete is constituted；
Upper base is made of ATB-25, No. 30 bituminous concretes of heavy traffic；
It goes to a grassroots level by cement stabilized macadam, 42.5 class g cements, cement dose 3.5% is constituted；
Bed course is the preferable gritting material of water penetration；
Roadbed is handled by reinforcement, and the modulus of resilience should ensure that in 35MPa or more；
It wherein goes up base and a coating emulsified asphalt permeable layers is set between going to a grassroots level, reinforce between bitumen layer and water stability detritus
It bonds, keeps the continuity of pavement structure.
Wherein, high-modulus additive, by groups such as waste and old PE, butadiene-styrene rubber, polyethylene wax, anti-aging components, plasticizing components
At basic recipe is as follows：
| Raw material | Waste and old PE | Butadiene-styrene rubber | Polyethylene wax | Anti-aging components | Plasticizing component |
| Basic recipe | 100 | 10-30 | 15-30 | 2-6 | 5-15 |
Waste and old PE regenerations after treatment can be used in the PE, economize on resources, energy conservation and environmental protection.The butadiene-styrene rubber is
Butadiene and product of the styrene monomer without copolymerization, relative molecular mass are 10 ~ 30 × 104, it is cementing to be remarkably improved pitch
The cryogenic property of material, so as to improve the crack resistance at low-temperature of asphalt.
The polyvinyl paraffin wax is a kind of mixture of synthesis straight-chain aliphatic hydrocarbon, is containing 40 ~ 120 carbon
The long-chain fat hydrocarbon of atom.Its fusing point at 100 DEG C or so, can reduce asphalt mix and stir and compacting temperature, improve road
Anti-rut behavior of the face in use temperature range.
The anti-aging components are activating rubber powder or carbon black.
The plasticizer component is dibutyl phthalate or dioctyl phthalate.
The high-modulus asphalt concrete is the asphalt using high-modulus additive, and dynamic stability is higher, is
3.0 ~ 4.5 times of plain asphalt mixture are 1.2 ~ 1.8 times of SBS modified asphalt mixtures.Wherein high-modulus additive be with
Waste plastic is primary raw material, while adding other compositions, improves the high-temperature stability of asphalt, while not being reduced low
Warm crack resistance and water stability, due to having polyethylene wax in high-modulus additive, which can improve temperature flowing, relatively
In matrix pitch, construction temperature need not improve too much, and 5 ~ 10 DEG C ensure that construction quality.
When bituminous concrete heat gathers materials dry mixing, high-modulus additive is launched into dry mixing 15s in blender, is then added
Pitch wet-mixing 45s；It is 190 ~ 200 DEG C to gather materials with the preheating temperature of miberal powder, and asphalt heating temperature is 160 ~ 170 DEG C, and Gao Mo is added
After measuring additive, the heating temperature of blender improves 5 ~ 10 DEG C than matrix pitch compound.High-modulus additive usage amount is drip
The optimum amount of the 0.2 ~ 0.8% of green concrete quality, high-modulus additive is 0.4 ~ 0.6%.When dosage is 0.2 ~ 0.4%, drip
Green concrete bitumen aggregate ratio is constant, and bituminous concrete bitumen aggregate ratio is calculated according to conventional bituminous concrete bitumen aggregate ratio；Work as dosage
When being 0.4 ~ 0.8%, bituminous concrete bitumen aggregate ratio improves 0.1 ~ 0.2%.
As previously mentioned, being high force area within the scope of 0 ~ 15cm of Pavement Coat Thickness with Land, the asphalt of high quality should be used,
This part asphalt plays the role of antiskid, water resistant damage, Rut resistance.For this purpose, upper layer and middle face layer choosing pavement performance
Preferable hot-mix asphalt mixture；Cutting optimal then uses High Modulus Asphalt Mixture, have Rut resistance, anti-fatigue performance it is good,
The advantages that shrinkage cracking, Water Damage should not be generated, can show good mechanics under the influence of Heavy Traffic or extreme climate
Performance.In pitch, cutting optimal be load curved drawing effect main region, especially in the case where base is cracking, reflection
Crack will be in, Quick Extended in cutting optimal, and high-modulus asphalt concrete layer is due to having stronger bearing capacity and antifatigue
Ability, the ability for resisting rutting deformation under high temperature environment is also very prominent, therefore is arranged between face layer and base, instead of passing
The pitch cutting optimal of system becomes the primary layers of the main supporting course and resisting fatigue effect of bituminous paving traffic loading.Gao Mo
The application of amount bituminous concrete layer below is conducive to reduce its internal shear stress and shearing strain, is conducive to resist the permanent of road surface
Deformation reduces bituminous paving cutting optimal track.
Asphalt macadam has enough durability and water stability, is set as base on road surface, can be effectively improved road surface
Anti-fatigue performance.Water stability detritus has higher bearing capacity, but more apparent to water temperature variation, therefore setting is being gone to a grassroots level, on
There are asphalt macadam, the protection of lower grittiness rubble to avoid generating Water Damage；It simultaneously will be in bituminous macadam and water-stable gravel
Between use emulsification pitch penetration, reinforce two structure sheafs between bonding, reduce the Water Damage of cement treated material；And it uses relatively low
The cement of dosage, with upper base's Asphalt Stabilized Macadam modulus of resilience than between being maintained at 1 ~ 3 as possible, avoiding stiffness differences excessive,
Excessive tensile stress or stretching strain are generated, water stability detritus thickness is not less than 30cm.Bed course uses gravel rubble, and thickness is not less than
15cm can play the role of moistureproof and waterproof, improve the water environment of entire pavement structure.
Claims (2)
1. a kind of Heavy Traffic Long Life Asphalt Pavement, it is characterised in that the deck structure of the Long Life Asphalt Pavement from top to bottom
It for upper layer, middle face layer, cutting optimal, upper base, goes to a grassroots level, bed course, roadbed, wherein cutting optimal is additive agent modified by high-modulus
High-modulus asphalt concrete is constituted, and the high-modulus additive is by PE, butadiene-styrene rubber, polyethylene wax, anti-aging components, plasticising group
Grade composition, wherein PE, butadiene-styrene rubber, polyethylene wax, anti-aging components, plasticizing component=100:10-30：15-30：2-6：5-
15, the upper layer is SMA-13, and asphalt binder used is SBS modified pitch, meets the requirement of PG76-22；The middle face
Layer is SMA-16, and asphalt binder used is SBS modified pitch, is met, the requirement of PG76-22；The cutting optimal is by HMAC-
20, matrix pitch is the asphalt mixture material composition of the addition high-modulus modifier of high-quality No. 70 pitch, high-modulus additive
Usage amount is the 0.2 ~ 0.8% of asphalt concrete quality, and the upper base is asphalt macadam ATB-25, and No. 30 pitches of heavy traffic are mixed
Solidifying soil is constituted；Described go to a grassroots level is made of cement stabilized macadam, and wherein cement is 42.5 class g cements, dosage 3.5%, upper base
Layer and a coating emulsified asphalt permeable layers are set between going to a grassroots level；
When bituminous concrete heat gathers materials dry mixing, high-modulus additive is launched into dry mixing 15s in blender, pitch is then added
Wet-mixing 45s；It is 190 ~ 200 DEG C to gather materials with the preheating temperature of miberal powder, and asphalt heating temperature is 160 ~ 170 DEG C, and high-modulus is added and adds
After adding agent, the heating temperature of blender improves 5 ~ 10 DEG C than matrix pitch compound, and high-modulus additive usage amount is mixed for pitch
The optimum amount of the 0.2 ~ 0.8% of solidifying soil property amount, high-modulus additive is 0.4 ~ 0.6%, and when dosage is 0.2 ~ 0.4%, pitch is mixed
Solidifying soil bitumen aggregate ratio is constant, and bituminous concrete bitumen aggregate ratio is calculated according to conventional bituminous concrete bitumen aggregate ratio；When dosage is 0.4
When ~ 0.8%, bituminous concrete bitumen aggregate ratio improves 0.1 ~ 0.2%.
2. Perpetual Pavements Structural according to claim 1, which is characterized in that by under the middle face layer-of the upper layer-
The new black top face layer overall thickness that face layer is constituted is more than 18cm；The upper groundwork thickness is more than 15cm；The thickness gone to a grassroots level
Not less than 30cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310331039.7A CN104343067B (en) | 2013-08-01 | 2013-08-01 | A kind of Heavy Traffic Long Life Asphalt Pavement |
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| CN201310331039.7A CN104343067B (en) | 2013-08-01 | 2013-08-01 | A kind of Heavy Traffic Long Life Asphalt Pavement |
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| CN104343067B true CN104343067B (en) | 2018-10-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108660880B (en) * | 2018-03-28 | 2020-04-28 | 扬州大学 | Method for determining optimal modulus combination of asphalt pavement structure layer |
| CN110698870A (en) * | 2019-11-19 | 2020-01-17 | 长安大学 | Storable high-modulus asphalt binder and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3188789B2 (en) * | 1993-04-21 | 2001-07-16 | 義之 大串 | Asphalt pavement structure |
| CN100999888A (en) * | 2006-12-30 | 2007-07-18 | 易志坚 | Road surface structure of rolling flexiable fibre cement concrete as based and construction method thereof |
| CN202359478U (en) * | 2011-12-14 | 2012-08-01 | 长安大学 | Multifunctional environmentally-friendly road surface |
| CN202359476U (en) * | 2011-12-07 | 2012-08-01 | 中冶天工集团有限公司 | Pavement structure with strong compression resistance |
| CN103215875A (en) * | 2013-04-22 | 2013-07-24 | 东南大学 | Differential-settlement-based anti-fatigue asphalt pavement |
-
2013
- 2013-08-01 CN CN201310331039.7A patent/CN104343067B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3188789B2 (en) * | 1993-04-21 | 2001-07-16 | 義之 大串 | Asphalt pavement structure |
| CN100999888A (en) * | 2006-12-30 | 2007-07-18 | 易志坚 | Road surface structure of rolling flexiable fibre cement concrete as based and construction method thereof |
| CN202359476U (en) * | 2011-12-07 | 2012-08-01 | 中冶天工集团有限公司 | Pavement structure with strong compression resistance |
| CN202359478U (en) * | 2011-12-14 | 2012-08-01 | 长安大学 | Multifunctional environmentally-friendly road surface |
| CN103215875A (en) * | 2013-04-22 | 2013-07-24 | 东南大学 | Differential-settlement-based anti-fatigue asphalt pavement |
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Effective date of registration: 20210625 Address after: 13 / F, 525 Jianguo East Road, Huangpu District, Shanghai 200025 Patentee after: SHANGHAI URBAN TRANSPORTATION DESIGN INSTITUTE Co.,Ltd. Address before: 200092 No. two, 901 North Road, Yangpu District, Shanghai, Zhongshan Patentee before: SHANGHAI MUNICIPAL ENGINEERING DESIGN INSTITUTE (Group) Co.,Ltd. |