CN104945919B - Pouring asphalt binder and preparation method thereof - Google Patents
Pouring asphalt binder and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of pouring asphalt binder and preparation method thereof, it is made up of the raw material of following percentage by weight：Matrix pitch 77~86%, SBS 5.5~6.0%, SIS 2.0~2.4%, EVA 0.5~1.0%, SAK 1.5~1.8%, PE waxes 2.0~3.0%, stabilizer 0.5~0.8% and prefabricated mix asphalt 2~8%；Its method is：Matrix pitch, SBS, SIS, EVA are mixed, it is levigate, SAK, PE wax are added, 0.5~1.5h is stirred, stabilizer is subsequently adding, 2~3h is developed at 165~185 DEG C, it is eventually adding prefabricated mix asphalt and stirs 0.5~1h, obtain final product.Pouring asphalt binder of the invention has good workability, adhesion is strong and has and voluntarily recovers deformability, in the case where Performance of Asphalt Binder at High Temperature is ensured, low-temperature resistance deformability and anti-fatigue performance are substantially increased, service life is extended, is particularly suitable for paving steel bridge deck.
Description
Technical field
The invention belongs to bridge deck pavement material technical field, and in particular to a kind of pouring asphalt binder and its preparation side
Method.
Background technology
Development, bridge especially Long span with highway network construction increases, and China is turned into world bridge big country.Bridge
Girder construction service life at least 100 years, general 15~20 years of deck paving projected life, bridge is generally throat thoroughfare, uses frequency
Numerous, actual life is often shorter.Because steel plate thermal conductivity is good, compared with cement concrete bridge deck, summer will for Steel Bridge Deck
High 5~10 DEG C, winter will low -5~-10 DEG C, high/low temperature span it is big, it is desirable to pavement material has more excellent high-temperature behavior and excellent
Good flexibility；While dynamic lower steel plate repeated deformation is big, the cohesive force and deformation concertedness to pave-load layer and steel plate are required also more
It is high.
Pouring asphalt concrete as paving steel bridge deck preferred structure material, not steamroller voluntarily flow close
Real shaping, with three it is high the characteristics of：Bitumen aggregate ratio (about 7~10%) high, mix temperature (180~220 DEG C) high, miberal powder content are high
(20~30%).Its pitch higher and fine aggregate content cause that coarse aggregate is in suspended state, and, one. with steel plate thin layer excessively
As thickness be 4~5cm, in level with the case of partially thin, asphalt binder is of crucial importance for the service life of paving steel bridge deck.Change
Property asphalt formulations be typically to add the high temperature performance that the high polymer such as SBS or SBR improves pitch in pitch, if modified pitch
Low-temperature resistance deforms or anti-fatigue performance need further to improve then need to while the high polymer parameter such as SBS or SBR is improved, pass through
Addition petroleum line softener, the material such as fatty oil softener can solve to a certain extent, while softening agent can reduce drip
Blue or green response to temperature, it is this popular with the requirement of mating formation that can meet highway, but for this large deformation of Steel Bridge Deck
The general rut that asphalt occurs quickly and cracking in flexible structure.In Japan, pouring asphalt binder is typically used
Bitumen is used cooperatively with road asphalt AH-30#, and the match ratio of bitumen reaches 25~30%, and the generally drip of gained
Blue or green product high temperature performance is difficult while being optimal.It is main using PmB25A modified pitch in Germany, it is big in the volume of traffic
Section, anti-fatigue performance and rutting resistance are under pressure.Whether Japan, or Germany, using low grade matrix pitch
Based on coordinated or be modified, and the rare low grade matrix pitch of China is sold, and bitumen is again by the place of production
Limitation, it is costly.
Patent CN101974236B be composition for 100 parts of bases drips, 2~15 parts of high polymers, 4~15 portions of reinforcing agents, 0.05~
0.5 part of stabilizer pours bituminous composition, and wherein reinforcing agent and high polymer is the material for improving pitch high temperature performance, because of group
Without the low viscous composition of drop in point, parameter component high can be such that the viscosity of modified pitch increases, it is necessary to 230~250 DEG C of warm mix high
Close, when temperature is higher than 230 DEG C, the high polymer such as SBS can be decomposed and the performance section of binder lost, reduced quality；Patent
CN103613327A is the pouring asphalt concrete bridge deck pavement material using modifying waste plastic agent configuration, and its composition is：
Matrix pitch 70%, waste or used plastics 6%, SBS5%, lake asphalt 19%.Beneficial effect is improved under deck paving hot environment
Dynamic stability and reduction mobile performance.Waste or used plastics are the poor modifying agent of adhesion property；Other waste or used plastics 6% and lake asphalt
19% can strengthen high-temperature behavior；SBS volumes only by 5% maintain low temperature flexibility, matching of the modifying agent in high temperature performance
It is upper to owe equilibrium.So the reasonability of the formula of pouring asphalt binder and technique is the skill for restricting paving steel bridge deck Materials
Art difficulty and key point.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind and is suitable for paving steel bridge deck, have to steel plate deformed it is good chase after from
Property, in the case where modified pitch high-temperature behavior is ensured, greatly improve the pouring type of low-temperature resistance deformability and anti-fatigue performance
Asphalt binder and preparation method thereof.
The technical scheme that the present invention is provided is a kind of pouring asphalt binder, including following percentage by weight raw material system
Into：Matrix pitch 77~86%, SBS 5.5~6.0%, SIS 2.0~2.4%, EVA 0.5~1.0%, SAK 1.5~
1.8%th, PE waxes 2.0~3.0%, stabilizer 0.5~0.8%, prefabricated mix asphalt 2~8%.The system of the prefabricated mix asphalt
Preparation Method is as follows：By the weight portion of matrix pitch 44~46, the weight portion of kir 52~54 and the weight portion of emulsified asphalt 1~2 in 100
~120 DEG C reconcile, premix, precipitating, filtering, and filtrate is prefabricated mix asphalt.
Matrix pitch of the present invention is No. 70 or No. 90 asphalt, meets China《Asphalt highway construction skill
Art specification》The technical requirements of (JTG F40-2004) bi tumenf orr oad.It is preferred that A grades No. 70 or A grades of No. 90 asphalt, fragrance
Content is divided to be more than 50, colloid index IC is 0.22~0.38.
SBS (SBS) of the present invention is type SBS or star-shaped sbs, line style
SBS weight average molecular weight is that 10~150,000, star-shaped sbs weight average molecular weight is 20~300,000.
SIS (SIS) of the present invention is line style SIS or star-like SIS, line
Type SIS weight average molecular weight is that 10~120,000, star-like SIS weight average molecular weight is 22~240,000.
EVA (ethylene-vinyl acetate copolymer) of the present invention, its density is 0.93~0.95g/cm3, melt index
It is 5~10g/10-1Min, VA content are 14~30%；
SAK of the present invention is a kind of warm mix modifying agent, is at normal temperatures a kind of white solid powder, and fusing point is 100
DEG C or so, the high-temperature behavior of asphalt, anti-water damage ability can be effectively improved.It can be specifically upper Haicheng letter road green wood
The SAK modifying agent of material Co., Ltd production.
PE waxes of the present invention, i.e. Tissuemat E, its molecular weight are that 8000, density is 970g/cm3, fusing point be 127
DEG C, softening point be 140 DEG C, viscosity be 8000.
The preparation method of stabilizer of the present invention is：By the weight portion of lignin fibre 10~50, metallic soap 10~55
Weight portion, the weight portion of stearmide 15~35 and the weight portion of sulphur 5~15 input blender in, 30~80 DEG C grind 0.5~
1.5h, is obtained stabilizer；The granularity of the stabilizer is less than 60 mesh.
In prefabricated mix asphalt of the present invention, kir solubility is more than 50%；Emulsified asphalt is cation emulsified drip
It is blue or green.
Present invention also offers the preparation method of above-mentioned pouring asphalt binder, comprise the following steps：
1) prefabricated mix asphalt is prepared：By the weight portion of matrix pitch 44~46, the weight portion of kir 52~54 and emulsification drip
Blue or green 1~2 weight portion reconciles in 100~120 DEG C, premixes, precipitating, filtering, and filtrate is prefabricated mix asphalt；
2) dispensing：Weigh the raw material of following percentage by weight：Matrix pitch 77~86%, SBS 5.5~6.0%, SIS
2.0~2.4%, EVA 0.5~1.0%, SAK 1.5~1.8%, PE waxes 2.0~3.0%, stabilizer 0.5~0.8% and pre-
Mix asphalt processed 2~8%；
3) by step 2) in matrix pitch be warming up to 180~210 DEG C, then squeeze into work tank；
4) toward addition SBS, SIS, EVA pellet in work tank, stir, cross colloid mill high speed shear 3 times, mixed
Material；
5) compound is squeezed into development tank, to SAK, PE wax powder material is added in development tank, stirs 0.5~1.5h, Ran Houjia
Enter stabilizer, 2~3h is developed at 165~185 DEG C, be eventually adding prefabricated mix asphalt and stir 0.5~1h, obtain final product.
Compared with prior art, the invention has the advantages that：
1st, polymer can improve the high-temperature behavior of pitch in pouring asphalt binder of the invention, be dripped after comprehensively modifying
Blue or green high-temperature behavior is remarkably improved；Along with the booster action of prefabricated mix asphalt, further effectively prevent in high temperature dynamic
Under the conditions of elapsed between bitumen layer and bridge floor, gather around the generation of the phenomenons such as bag, cracking.
2nd, EVA cohesive forces are strong in pouring asphalt binder of the invention, and being belonged to SAK, PE wax can improve high/low temperature
The warm-mixing agent of performance, can make high dose polymer modified asphalt viscosity decline, meet pouring asphalt concrete voluntarily flow it is close
The construction requirement of real shaping.
3rd, stabilizer is by lignin fibre, metallic soap, stearmide and sulphur in pouring asphalt binder of the invention
Sulphur is constituted, and this stabilizer can make Flexible Pavement Structure with the function of voluntarily recovering, and enhancing pours the adhesion of asphalt binder
Property, extensibility and crack resistance.
4th, SIS is thermoplastic elastomer (TPE), basic material in adhesive, viscosity in pouring asphalt binder of the invention
By force, all kinds of different materials are bonded, and improves pitch low temperature flexibility and resilience jointly with SBS, SAK, EVA polymer.
5th, the consumption of bitumen is smaller in pouring asphalt binder of the invention, and need not use low grade base
Matter pitch, greatly reduces production cost.
6th, inventive formulation complexity, process is simple, can not increase investment on the basis of existing Production Process of Modified Bitumen,
It is easy to implement to promote.
Specific embodiment
The present invention is further elaborated for specific examples below, but not as a limitation of the invention.
Embodiment 1
Contain following raw material in 100kg asphalt binders：No. 90 asphalt 77kg, type SBS 6.0kg, line style SIS
2.4kg, EVA 1.0kg, SAK 1.8kg, PE wax 3.0kg, stabilizer 0.8kg, prefabricated mix asphalt 8kg；
Preparation method：
1) preparation of prefabricated mix asphalt：By matrix pitch 44kg, kir 52kg and emulsified asphalt 1kg in 100 DEG C of tune
With, premix, precipitation, filtering, filtrate is prefabricated mix asphalt；
2) preparation of stabilizer：By lignin fibre 10kg, metallic soap 10kg, stearmide 15kg and sulphur 5kg input
In blender, 0.5h is ground at 30 DEG C, stabilizer is obtained；The granularity of the stabilizer is less than 60 mesh；
3) No. 90 asphalt of 77kg are warming up to 180 DEG C, are then squeezed into work tank；
4) toward addition type SBS 6.0kg, line style SIS 2.4kg, EVA 1.0kg in work tank, stir, cross colloid
Mill high speed shear 3 times, obtains compound；
5) compound is squeezed into development tank, to metered SAK 1.8kg, PE wax 3.0kg in development tank, stirs 0.5h,
Stabilizer 0.8kg is subsequently adding, 2h is developed at 165 DEG C, be eventually adding prefabricated mix asphalt 8kg stirrings 0.5h, obtained final product.
Comparative example 1
Contain following raw material in 100kg asphalt binders：No. 90 asphalt 82kg, furfural extract oil 4kg, type SBSs
13.2kg, sulphur 0.8kg；
Preparation method：
1) No. 90 asphalt 82kg are warming up to 180 DEG C, add furfural extract oil 4kg, then squeezed into work tank；
2) toward addition type SBS 13.2kg in work tank, stir, cross colloid mill high speed shear 3 times, mixed
Material；
3) compound is squeezed into development tank, adds sulphur 0.8kg, 2.5h is developed at 165 DEG C, obtained final product.
Embodiment 2
Contain following raw material in 100kg asphalt binders：No. 70 asphalt 86kg, star-shaped sbs 5.5kg, star-like SIS
2.0kg, EVA 0.5kg, SAK 1.5kg, PE wax 2.0kg, stabilizer 0.5kg, prefabricated mix asphalt 2kg.
Preparation method：
1) preparation of prefabricated mix asphalt：By matrix pitch 46kg, kir 54kg and emulsified asphalt 2kg in 120 DEG C of tune
With, premix, precipitation, filtering, filtrate is prefabricated mix asphalt；
2) preparation of stabilizer：By lignin fibre 50kg, metallic soap 55kg, stearmide 35kg and sulphur 15kg input
In blender, 1.5h is ground at 80 DEG C, stabilizer is obtained；The granularity of the stabilizer is less than 60 mesh；
3) No. 70 asphalt 86kg are warming up to 200 DEG C, are then squeezed into work tank；
4) toward addition star-shaped sbs 5.5kg, star-like SIS 2.0kg, EVA 0.5kg in work tank, stir, cross colloid
Mill high speed shear 3 times, obtains compound；
5) compound is squeezed into development tank, to metered SAK 1.5kg, PE wax 2.0kg in development tank, stirs 1.5h,
Stabilizer 0.5kg is subsequently adding, 3h is developed at 185 DEG C, be eventually adding prefabricated mix asphalt 2kg stirrings 1h, obtained final product.
Embodiment 3
Contain following raw material in 100kg asphalt binders：By No. 70 asphalt 80kg, type SBS 5.8kg, star-like
SIS 2.2kg, EVA 0.8kg, SAK 1.7kg, PE waxes 2.5kg, stabilizer 0.6kg, prefabricated mix asphalt 6.4kg.
Preparation method：
1) preparation of prefabricated mix asphalt：By matrix pitch 45kg, kir 53kg and emulsified asphalt 1.5kg in 115 DEG C
Reconcile, premix, precipitate, filter, filtrate is prefabricated mix asphalt；
2) preparation of stabilizer：By lignin fibre 30kg, metallic soap 45kg, stearmide 25kg and sulphur 10kg input
In blender, 1h is ground at 60 DEG C, stabilizer is obtained；The granularity of the stabilizer is less than 60 mesh.
3) No. 70 asphalt 80kg are warming up to 210 DEG C, are then squeezed into work tank；
4) toward addition SBS 5.8kg, SIS 2.2kg, EVA 0.8kg in work tank, stir, cross colloid mill and cut at a high speed
Cut 3 times, obtain compound；
5) compound is squeezed into development tank, to metered SAK 1.7kg, PE wax 2.5kg in development tank, stirs 1h, so
Stabilizer 0.6kg is added afterwards, 2.5h is developed at 175 DEG C, be eventually adding prefabricated mix asphalt 6.4kg stirrings 0.8h, obtain final product.
Experimental example
The asphalt binder of embodiment 1~3 and comparative example 1 is carried out into indices test, 1 is as a result see the table below：
Each index table of comparisons of the asphalt binder of table 1
As shown in Table 1, the asphalt binder of embodiment 1~3 is compared with the asphalt binder of comparative example 1, the property of each side
Can significantly improve, its anti-fatigue performance, high-temperature behavior and low-temperature deformation ability are obtained for very big raising.
The pouring asphalt binder of embodiment 1~3 and comparative example 1 is made pouring asphalt coagulation by the following method
Soil：Use《Highway steel box bridge Pavement design and construction technology guide》What the GA-10 types level in regulation was matched somebody with somebody gathers materials, respectively with this
The asphalt binder of inventive embodiments 1~3 and comparative example 1 mixes 30min at 180~220 DEG C, obtains final product pouring asphalt and mixes
Solidifying soil.Each group pouring type concrete is carried out into following index test, 2 are the results are shown in Table：
Table 2：Each index table of comparisons of pouring asphalt concrete
Note：Low temperature bend test sample dimensions：300×100×50mm
After steel bridge is opened, it is desirable to which bituminous concrete deforms minimum under vehicle load, evaluation index is pile penetration, pile penetration
Increment and times of fatigue, pile penetration and pile penetration increment are smaller, and times of fatigue is bigger, for the deformation resistance of vehicle load
Can be stronger, deformation occurs smaller.Low-temperature bending limiting strain is the serious section of repeated deformation of the main structure bodies such as bridge, is used for
The index in bituminous concrete life-span is evaluated, its value is bigger, illustrates that splitting resistance is better.Mobility is smaller, and pouring construction performance is got over
It is good.
As shown in Table 2, the asphalt binder of embodiment 1~3 is made into pouring asphalt concrete and the pitch of comparative example
The pouring asphalt concrete that binder is made into is compared, operability of constructing, Resisting fractre morphotropism, the performance such as anti-load deflection
Have and greatly improve.
Claims (6)
1. pouring asphalt binder, it is characterised in that：It is made up of the raw material of following weight portion：Matrix pitch 77~86%, SBS
5.5~6.0%, SIS 2.0~2.4%, EVA 0.5~1.0%, SAK 1.5~1.8%, PE waxes 2.0~3.0%, stabilizer
0.5~0.8% and prefabricated mix asphalt 2~8%；The preparation method of the prefabricated mix asphalt is as follows：By matrix pitch 44~
46 weight portions, the weight portion of kir 52~54 and the weight portion of emulsified asphalt 1~2 reconcile in 100~120 DEG C, premix, precipitation, mistake
Filter, filtrate is prefabricated mix asphalt；
The stabilizer is obtained by the following method：By the weight portion of lignin fibre 10~50, the weight portion of metallic soap 10~55, tristearin
In the weight portion of acid amides 15~35 and the weight portion of sulphur 5~15 input blender, 0.5~1.5h is ground at 30~80 DEG C, be obtained steady
Determine agent；The granularity of the stabilizer is less than 60 mesh.
2. pouring asphalt binder according to claim 1, it is characterised in that：The matrix pitch is No. 70 or No. 90
Asphalt.
3. pouring asphalt binder according to claim 1, it is characterised in that：The SBS is type SBS or star-like
SBS。
4. pouring asphalt binder according to claim 1, it is characterised in that：The SIS is line style SIS or star-like
SIS。
5. pouring asphalt binder according to claim 1, it is characterised in that：The kir solubility is more than
50%；The emulsified asphalt is cationic emulsified bitumen.
6. the preparation method of the pouring asphalt binder as any one of Claims 1 to 5, it is characterised in that：Including
Following steps：
1) prefabricated mix asphalt is prepared：By the weight portion of matrix pitch 44~46, the weight portion of kir 52~54 and emulsified asphalt 1~
2 weight portions reconcile in 100~120 DEG C, premix, precipitating, filtering, and filtrate is prefabricated mix asphalt；
2) dispensing：Weigh the raw material of following percentage by weight：Matrix pitch 77~86%, SBS 5.5~6.0%, SIS 2.0~
2.4%th, EVA 0.5~1.0%, SAK 1.5~1.8%, PE waxes 2.0~3.0%, stabilizer 0.5~0.8% and prefabricated mixing
Pitch 2~8%；
3) by step 2) in matrix pitch be warming up to 180~210 DEG C, then squeeze into work tank；
4) toward addition SBS, SIS, EVA pellet in work tank, stir, cross colloid mill high speed shear 3 times, obtain compound；
5) compound is squeezed into development tank, then to SAK, PE wax powder material is added in development tank, stirs 0.5~1.5h, Ran Houjia
Enter stabilizer, 2~3h is developed at 165~185 DEG C, be eventually adding prefabricated mix asphalt and stir 0.5~1h, obtain final product.
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| CN106336545B (en) * | 2016-08-22 | 2018-11-06 | 湖北国创高新材料股份有限公司 | A kind of hot-mix asphalt mixture seam patch and preparation method thereof slowing down pavement crack |
| CN106587705B (en) * | 2016-12-21 | 2019-02-01 | 国路高科（北京）工程技术研究院有限公司 | A kind of SMA asphalt concrete modifying agent and preparation method thereof |
| CN107718801A (en) * | 2017-08-29 | 2018-02-23 | 杭州伊斯特塑料制品有限公司 | A kind of asphalt water-proof coiled material |
| CN110499034A (en) * | 2019-08-19 | 2019-11-26 | 上海同沥新材料科技有限公司 | A kind of dedicated modified pitch of pouring asphalt concrete and preparation method thereof |
| CN110724387A (en) * | 2019-11-05 | 2020-01-24 | 福建师范大学 | Modified asphalt pavement repair material suitable for high-temperature rainy areas and preparation method thereof |
| CN114933811B (en) * | 2022-05-09 | 2023-05-30 | 北京东方雨虹防水技术股份有限公司 | High-strength elastic high polymer modified asphalt, preparation and waterproof coiled material, preparation and application thereof and airport pavement structure system |
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| CN102838874B (en) * | 2012-09-17 | 2013-05-08 | 山东建筑大学 | Asphalt modifier, modified asphalt and asphalt mixture |
| CN103044938B (en) * | 2013-01-21 | 2015-02-18 | 武汉科技大学 | Coal asphalt/SBS (Styrene Butadiene Styrene)/waste colloid powder composite modified asphalt and preparation method thereof |
| CN103483836B (en) * | 2013-09-24 | 2015-07-15 | 交通运输部公路科学研究所 | Modified asphalt and preparation method thereof as well as mixture containing same |
| CN104629391B (en) * | 2015-02-11 | 2017-06-27 | 上海市政工程设计研究总院（集团）有限公司 | High resiliency asphalt modification composition, modifying agent, modified pitch, modified asphalt mixture and preparation method |
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