CN109437676A - SBR high-modulus composite modified asphalt mixture and preparation method thereof and pavement structure - Google Patents
SBR high-modulus composite modified asphalt mixture and preparation method thereof and pavement structure Download PDFInfo
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- CN109437676A CN109437676A CN201811577285.XA CN201811577285A CN109437676A CN 109437676 A CN109437676 A CN 109437676A CN 201811577285 A CN201811577285 A CN 201811577285A CN 109437676 A CN109437676 A CN 109437676A
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- sbr
- modulus
- asphalt mixture
- composite modified
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- 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
-
- 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
-
- 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
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
-
- 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
- E01C7/22—Binder incorporated in hot state, e.g. heated bitumen
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to road construction fields, and in particular to a kind of SBR high-modulus composite modified asphalt mixture and preparation method thereof and pavement structure.Technical scheme is as follows: SBR high-modulus composite modified asphalt mixture, including mineral aggregate, pitch, SBR modifying agent and high-modulus agent, count by weight percentage, the bitumen aggregate ratio of pitch and mineral aggregate is 4.3-5.5%, SBR content of modifier is the 3-5% of asphalt content, and high-modulus agent volume is the 0.3-0.6% of mixture gross weight.SBR high-modulus composite modified asphalt mixture provided by the invention and preparation method thereof and pavement structure, with SBR modifying agent and high-modulus agent composite modified asphalt mixture, northern area road is newly-built, maintenance, applies in improvement project, it can be improved the anti-anti-rut behavior and cracking resistance on road surface, bituminous pavement high temperature performance can be improved simultaneously, extend Road Service Life and curing cycle.
Description
Technical field
The invention belongs to road construction fields, and in particular to a kind of SBR high-modulus composite modified asphalt mixture and its system
Preparation Method and pavement structure.
Background technique
The northern area of China average temperature of the whole year is low, and the four seasons temperature difference is big, day and night temperature is big.Asphalt concrete pavement summer easily goes out
Show high temperature deformation, especially with the increase of the volume of traffic and heavy-duty vehicle, pavement track breakoff phenomenon is even more serious；Winter due to
Easily there is cold cracking disease in low temperature, bituminous pavement；Bituminous pavement also faces the aging at temperature of pitch simultaneously and ultraviolet light shines
The problems such as penetrating aging.
Currently, the main means for solving road surface high temperature track disease are to pass through raising mixture using high-modulus agent is added
Dynamic modulus improve surface layer structure high temperature deformation resistance ability.According to statistics, the high-temperature stability of High Modulus Asphalt Mixture
Index is generally more than 5000 times/mm.However, High Modulus Asphalt Mixture poor performance at low temperatures, mixture dynamic modulus is excessive, bending
Maximum flexural-tensile strain index is tested in 2000 μ ε or so, it is easy to crack under northern cryogenic conditions, be not suitable for answering in road surface
With to improving, road surface cryogenic property is unfavorable.
SBR is Afpol, is a kind of high molecular polymer.SBR modified pitch can effectively improve drip
The low-temperature cracking-resistance of green mixture, and the water resistance, response to temperature, flexibility of bituminous concrete can be improved, with it is high-intensitive,
High stability and antifatigue loss are suitble to northern area climatic characteristic.
Summary of the invention
The present invention provides a kind of SBR high-modulus composite modified asphalt mixture and preparation method thereof and pavement structure, with SBR
Modifying agent and high-modulus agent composite modified asphalt mixture, northern area road is newly-built, maintenance, applies in improvement project, energy
The anti-anti-rut behavior and cracking resistance for enough improving road surface, can improve bituminous pavement high temperature performance simultaneously, extend road occupation
Service life and curing cycle.
Technical scheme is as follows:
SBR high-modulus composite modified asphalt mixture, including mineral aggregate, pitch, SBR modifying agent and high-modulus agent, by weight
Percentage calculates, and the bitumen aggregate ratio of pitch and mineral aggregate is 4.3-5.5%, and SBR content of modifier is the 3-5%, Gao Mo of asphalt content
Measure the 0.3-0.6% that agent volume is mixture gross weight.
The preparation method of above-mentioned SBR high-modulus composite modified asphalt mixture, includes the following steps:
1) before construction 8-24h prepare SBR modified pitch, matrix pitch is heated to 160-180 DEG C first, in proportion plus
Enter powdered SBR modifying agent, stirring guarantees that it is evenly distributed, obtains SBR modified pitch；
2) mineral aggregate and high-modulus agent are proportionally added into and mix cylinder dry mixing, be then proportionally added into the SBR modified pitch into
Row mixture is modified.
SBR high-modulus composite modified asphalt mixture pavement structure, including upper layer and cutting optimal, the upper layer are upper
State the AC-16 layer of SBR high-modulus composite modified asphalt mixture preparation；The above-mentioned composite modified drip of SBR high-modulus of cutting optimal
The AC-20 layer of green mixture preparation；The cutting optimal is laid on former road surface by emulsified asphalt adhesion coating, and the upper layer passes through
Emulsified asphalt adhesion coating is laid on the cutting optimal.
The SBR high-modulus composite modified asphalt mixture pavement structure, preferred embodiment is the thickness of the upper layer
Degree be 4~5cm, the cutting optimal with a thickness of 6~8cm.
The invention has the benefit that the present invention uses the continuous dense-graded mix of AC-16, AC-20 for design vector, it is right
The common pavement surface structure in northern areas is answered, design and construction difficulty is reduced；It is compound using SBR modifying agent and high-modulus agent
Modified asphalt mixture surfacing can improve road surface rutting resistance and anti-low-temperature cracking ability simultaneously, extend road occupation
Service life；By the way that by SBR modifying agent and high-modulus agent compound use, composite modified asphalt mixture high temperature performance, realizing is reduced
Cost, the effect for improving modified effect.SBR modified pitch preparation process is similar with SBS, and general blending station is provided with live processing
Condition and ability, high-modulus agent use dry method direct putting type, and construction technology is simple, mix and stir quality convenient for control.
Detailed description of the invention
Fig. 1 is SBR high-modulus composite modified asphalt mixture pavement structure schematic diagram.
Specific embodiment
A kind of SBR high-modulus composite modified asphalt mixture, including mineral aggregate, pitch, SBR modifying agent and high-modulus agent, are pressed
Weight percent calculates, and the bitumen aggregate ratio of pitch and mineral aggregate is 4.3-5.5%, and SBR content of modifier is the 3-5% of asphalt content,
High-modulus agent volume is the 0.3-0.6% of mixture gross weight.
The preparation method of above-mentioned SBR high-modulus composite modified asphalt mixture, includes the following steps:
1) 12-24h prepares SBR modified pitch before construction, and matrix pitch is heated to 170 DEG C first, is proportionally added into
Powdered SBR modifying agent, stirring guarantee that it is evenly distributed, obtain SBR modified pitch；
2) mineral aggregate and high-modulus agent are proportionally added into and mix cylinder dry mixing, be then proportionally added into the SBR modified pitch into
Row mixture is modified.
SBR high-modulus composite modified asphalt mixture pavement structure, including upper layer and cutting optimal, the upper layer are upper
State the AC-16 layer of SBR high-modulus composite modified asphalt mixture preparation；The above-mentioned composite modified drip of SBR high-modulus of cutting optimal
The AC-20 layer of green mixture preparation；The cutting optimal is laid on former road surface by emulsified asphalt adhesion coating, and the upper layer passes through
Emulsified asphalt adhesion coating is laid on the cutting optimal；The upper layer with a thickness of 4~5cm, the cutting optimal with a thickness of 6~
8cm。
Embodiment
As shown in Figure 1, SBR high-modulus composite modified asphalt mixture pavement structure, matrix pitch uses Liaohe River 90# petroleum
Pitch, emulsified asphalt adhesion coating 2 use PA-3 anionic emulsified bitumen；Upper layer 1 is AC-16C layers, mineral aggregate ratio are as follows: partial size
(9.5~13.2) ore particle: partial size (4.75~9.5) ore particle: partial size (2.36~4.75) ore particle: partial size (1.18~2.36) mine
Grain: partial size (< 1.18) ore particle: the bitumen aggregate ratio of miberal powder=26%:21%:18%:21%:10%:4%, pitch and mineral aggregate is
4.7%, SBR content of modifier are the 3% of asphalt content, and high-modulus agent volume is the 0.4% of mixture gross weight；The modified drip of SBR
Prepared by blueness 8-24h before construction, pitch is heated to 170 DEG C first, is proportionally added into powdered SBR modifying agent, high-modulus agent
It is directly added into and mixes cylinder dry mixing progress mixture modification；Cutting optimal 3 is AC-20 layers, mineral aggregate ratio are as follows: partial size (10~20mm) mine
Grain: partial size (10~15mm) ore particle: partial size (5~10mm) ore particle: partial size (0~5mm) ore particle: miberal powder=42.7%:12.0%:
The bitumen aggregate ratio of 36.0%:3.0%:3.0%, pitch and mineral aggregate is that 4.5%, SBR content of modifier is the 4% of asphalt content, high
Modulus agent volume is the 0.4% of mixture gross weight；Prepared by SBR modified pitch 12-24h before construction, be first heated to pitch
170 DEG C, it is proportionally added into powdered SBR modifying agent, high-modulus agent, which is directly added into, mixes cylinder dry mixing progress mixture modification.
In preparation process, former road surface 4 is subjected to milling processing first, processing depth is 6cm, and the laggard walking along the street face of milling is clear
Reason sprays emulsified asphalt on former road surface 4 and forms emulsified asphalt adhesion coating 2, and after pitch demulsification solidification to be emulsified, pave SBR Gao Mo
The AC-20 of composite modified asphalt mixture preparation is measured, cutting optimal 3 is formed；Emulsified asphalt adhesion coating 2 is sprayed on layer 3 below later,
After pitch demulsification solidification to be emulsified, the AC-16 of the SBR high-modulus composite modified asphalt mixture that paves preparation forms upper layer 1；
Pavement construction is completed after compacting molding.
SBR high-modulus composite modified asphalt mixture pavement structure, high-temperature behavior dynamic stability stably reach 6000 times/mm
More than, the strain of cryogenic property low temperature damage reaches 2800 μ ε or more, while meeting high-modulus technical specification and modified pitch skill
Art specification has good high temperature performance to the index request of high temperature performance, and specific targets are as shown in table 1 below:
1 SBR high-modulus composite modified asphalt mixture pavement structure performance indicator of table
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1.SBR high-modulus composite modified asphalt mixture, which is characterized in that including mineral aggregate, pitch, SBR modifying agent and high-modulus
Agent, count by weight percentage, the bitumen aggregate ratio of pitch and mineral aggregate are 4.3-5.5%, and SBR content of modifier is the 3- of asphalt content
5%, high-modulus agent volume is the 0.3-0.6% of mixture gross weight.
2. the preparation method of SBR high-modulus composite modified asphalt mixture as described in claim 1, which is characterized in that including
Following steps:
1) 8-24h prepares SBR modified pitch before construction, and matrix pitch is heated to 160-180 DEG C first, is proportionally added into powder
Last shape SBR modifying agent, stirring guarantee that it is evenly distributed, obtain SBR modified pitch；
2) mineral aggregate and high-modulus agent are proportionally added into and mix cylinder dry mixing, be then proportionally added into the SBR modified pitch and mixed
Material is closed to be modified.
3.SBR high-modulus composite modified asphalt mixture pavement structure, which is characterized in that described including upper layer and cutting optimal
Upper layer is the AC-16 layer of SBR high-modulus composite modified asphalt mixture as described in claim 1 preparation；The cutting optimal
For the AC-20 layer of SBR high-modulus composite modified asphalt mixture as described in claim 1 preparation；The cutting optimal passes through cream
Change pitch adhesion coating to be laid on former road surface, the upper layer is laid on the cutting optimal by emulsified asphalt adhesion coating.
4. SBR high-modulus composite modified asphalt mixture pavement structure according to claim 3, which is characterized in that described
Upper layer with a thickness of 4~5cm, the cutting optimal with a thickness of 6~8cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811577285.XA CN109437676A (en) | 2018-12-24 | 2018-12-24 | SBR high-modulus composite modified asphalt mixture and preparation method thereof and pavement structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811577285.XA CN109437676A (en) | 2018-12-24 | 2018-12-24 | SBR high-modulus composite modified asphalt mixture and preparation method thereof and pavement structure |
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| CN109437676A true CN109437676A (en) | 2019-03-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233376A (en) * | 2020-03-12 | 2020-06-05 | 中交路桥北方工程有限公司 | Asphalt concrete formula suitable for high-altitude cold regions |
| CN111519489A (en) * | 2020-05-11 | 2020-08-11 | 四川快马重工机械有限公司 | Rapid repairing material for web crack diseases and preparation process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207646559U (en) * | 2017-12-08 | 2018-07-24 | 江苏中路工程技术研究院有限公司 | One kind being based on the composite modified Rut resistance pavement structure of bitumen |
-
2018
- 2018-12-24 CN CN201811577285.XA patent/CN109437676A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207646559U (en) * | 2017-12-08 | 2018-07-24 | 江苏中路工程技术研究院有限公司 | One kind being based on the composite modified Rut resistance pavement structure of bitumen |
Non-Patent Citations (1)
| Title |
|---|
| 余志刚: "高模量剂与SBR复合改性沥青及其混合料性能研究", 《公路工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111233376A (en) * | 2020-03-12 | 2020-06-05 | 中交路桥北方工程有限公司 | Asphalt concrete formula suitable for high-altitude cold regions |
| CN111519489A (en) * | 2020-05-11 | 2020-08-11 | 四川快马重工机械有限公司 | Rapid repairing material for web crack diseases and preparation process thereof |
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Application publication date: 20190308 |