CN104343067B - A kind of Heavy Traffic Long Life Asphalt Pavement - Google Patents

A kind of Heavy Traffic Long Life Asphalt Pavement Download PDF

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Publication number
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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China
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asphalt
modulus
pitch
additive
heavy traffic
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CN201310331039.7A
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CN104343067A (en
Inventor
乔英娟
麻旭荣
郑晓光
白彦峰
何昌轩
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SHANGHAI URBAN TRANSPORTATION DESIGN INSTITUTE Co.,Ltd.
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/18Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/26Coherent 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • C04B24/26Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch

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

A kind of Heavy Traffic Long Life Asphalt Pavement
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.
CN201310331039.7A 2013-08-01 2013-08-01 A kind of Heavy Traffic Long Life Asphalt Pavement Active CN104343067B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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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