WO2012103691A1 - Bitume routier modifié par un modificateur composite et son procédé de préparation - Google Patents

Bitume routier modifié par un modificateur composite et son procédé de préparation Download PDF

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Publication number
WO2012103691A1
WO2012103691A1 PCT/CN2011/073230 CN2011073230W WO2012103691A1 WO 2012103691 A1 WO2012103691 A1 WO 2012103691A1 CN 2011073230 W CN2011073230 W CN 2011073230W WO 2012103691 A1 WO2012103691 A1 WO 2012103691A1
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WO
WIPO (PCT)
Prior art keywords
asphalt
mixture
composite modifier
road asphalt
modified
Prior art date
Application number
PCT/CN2011/073230
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English (en)
Chinese (zh)
Inventor
潘民光
Original Assignee
佛山惠幅化工有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 佛山惠幅化工有限公司 filed Critical 佛山惠幅化工有限公司
Publication of WO2012103691A1 publication Critical patent/WO2012103691A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L17/00—Compositions of reclaimed rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes

Definitions

  • the present invention relates to a composite modifier modified road asphalt and a preparation method thereof, and belongs to the field of petrochemical industry.
  • the modified asphalt is generally an external admixture (modifier) such as rubber, resin, high molecular polymer, ground rubber powder or other filler, mixed with asphalt, or lightly oxidized for asphalt.
  • modifier such as rubber, resin, high molecular polymer, ground rubber powder or other filler, mixed with asphalt, or lightly oxidized for asphalt.
  • Such measures can be used to improve the performance of the asphalt or asphalt mixture, and the modification of the asphalt can be realized by changing the chemical composition of the asphalt or by uniformly distributing the modifier in the asphalt to form a certain spatial network structure.
  • a method for modifying asphalt by using waste tire rubber powder since waste tires can be recycled and reused, and resource recycling is facilitated, thereby eliminating environmental pollution, and at the same time, the green rubber modified with waste tire rubber powder can also be used for
  • the paving construction of noise-reducing pavement is beneficial to reduce urban traffic noise.
  • the pavement paved with this modified asphalt has better heat resistance, cold resistance and anti-skid performance, and has the advantages of rich raw materials and high cost performance. Therefore, in recent times The year has also received extensive attention.
  • Chinese patents ZL 200410040237.9, ZL 200510016293.3, ZL200610023919.8, etc. have carried out related research on the production of rubber powder, the method and equipment of rubber powder modified asphalt and achieved good results.
  • the waste rubber powder is a vulcanized rubber powder because it comes from waste tires. Its structure is a three-dimensional network structure and contains various additives. The composition is complicated, and it is more common than conventional rubber powder or thermoplastic styrene-butadiene rubber. Polymers such as (SBS) are more difficult to swell and disperse in the asphalt.
  • SBS thermoplastic styrene-butadiene rubber
  • the existing waste tire rubber powder modified asphalt process often performs high temperature swelling, physical shearing, grinding and dispersing agitation of the waste tire rubber powder of a certain degree of fineness, which is affected by the reaction inertness of the waste tire rubber powder itself.
  • the use of waste tire rubber powder to modify the asphalt will make the storage and stability of the asphalt poor, and the final modification effect is not satisfactory.
  • the patent CN1114258A proposes to cut waste rubber tire into thin strips or fine powder mixed with asphalt. This method is only used at the production site and fails to solve the actual storage stability.
  • the problem is also proposed to use the desulfurization rubber powder to modify the asphalt, such as CN1597782, CN1441005 Instruction manual
  • SBS as a modifier
  • the price of SBS currently on the market is about 20,000 yuan / ton, such as 4.5% of the amount of feed, (the amount of modified asphalt modifier is generally 4% - 5%) per ton of modified asphalt modifier It is around 900 yuan; the second is poor anti-aging performance.
  • the rubber section of SBS is raw rubber that has not been vulcanized and crosslinked, so the aging resistance is definitely poor; in addition, SBS has a smaller share of the entire modified asphalt body. For these reasons, the use of SBS alone to improve the performance of road asphalt does have some of the above-mentioned problems that are difficult to solve.
  • the present invention provides a composite modifier modified road asphalt and a preparation method thereof, and the composite modifier modified road asphalt is compounded with a vulcanized rubber powder and a thermoplastic styrene-butadiene rubber (SBS).
  • SBS thermoplastic styrene-butadiene rubber
  • the new method is obtained by adding a certain amount of vulcanized rubber powder to the matrix asphalt, and using SBS and stabilizer to carry out composite modification of the asphalt, which is obtained by shearing and grinding after colloid grinding.
  • the modified road asphalt has the characteristics of low production cost, simple process, high product quality, anti-rutting and low-temperature crack resistance, and environmental protection.
  • the stabilizer is used as the composition of the road asphalt modified by the composite modifier of the present invention.
  • the composite modifier modified road asphalt of the present invention is prepared by the following steps:
  • the colloid mill is started, the temperature is controlled at 180 ° C - 200 ° C, and the mixture B is sheared and ground on the colloid grinding disc, and circulated 2-3 times; the mixture B is sheared by the colloid mill. When added, it accounts for 1% of the mass of the matrix asphalt. -2%.
  • the stabilizer is co-milled, and the composite modifier is used to modify the road asphalt after the completion of the grinding.
  • the vulcanized rubber powder having a mass of 7% of the base asphalt is mixed with the 90# heavy-duty asphalt in the reactor VI, and stirred while being heated to form a mixture A which is sufficiently plasticized and mixed.
  • a mixture A which is sufficiently plasticized and mixed.
  • the mixture A was pumped to the reactor V2, and a thermoplastic styrene-butadiene rubber (SBS) having a mass of 5.1% of the matrix pitch was added, and the mixture was stirred while being added. After the addition was completed, stirring was continued for 25 minutes to obtain a mixture B.
  • the colloid mill is started, the temperature is controlled at 185 ° C, the mixture B is sheared and ground on the grinding disc, and the cycle is repeated twice. At the last cycle, the mass of the matrix asphalt is added by 1%.
  • the sulphur is sulphur, and the finished end of the modified road asphalt is finished.
  • the vulcanized rubber powder of 8% by mass of the base asphalt is mixed with the 70# heavy-duty asphalt, and stirred while being heated to form a fully plasticized, uniformly mixed mixture A.
  • the pump was opened, and the mixture A was pumped to the reaction vessel, and a thermoplastic styrene-butadiene rubber (SBS) having a mass of 5.5% of the matrix pitch was added, and the mixture was stirred while being added.
  • SBS thermoplastic styrene-butadiene rubber
  • stirring was continued for 25 minutes to obtain a mixture B.
  • the colloid mill is started, the temperature is controlled at 18 CTC, and the mixture B is sheared and ground on the grinding disc, and the cycle is repeated twice.
  • the mass of the matrix asphalt is added by 1.5%.
  • the sulphur the end of the cycle, is finished with modified road asphalt.
  • the vulcanized rubber powder having a mass of 9% of the base asphalt was mixed with 70# heavy-duty asphalt, and stirred while being heated to form a fully plasticized, uniformly mixed mixture A.
  • the pump was opened, and the mixture A was pumped to the reaction vessel, and a thermoplastic styrene-butadiene rubber (SBS) having a mass of 7% of the base pitch was added, and the mixture was stirred while being added. After the addition was completed, stirring was continued for 25 minutes to obtain a mixture B. After the stirring was completed, the colloid mill was started, the temperature was controlled at 190 ° C, and the mixture B was sheared, ground, and circulated three times on the grinding disc. At the first cycle, the mass of the matrix pitch was 1.5%. The sulphur, the end of the cycle has a modified road asphalt finished product.
  • the vulcanized rubber powder having a base asphalt mass of 10% is mixed with 90# heavy-duty asphalt, and stirred while being heated to form a fully plasticized, uniformly mixed mixture A.
  • the pump was opened, and the mixture A was pumped to the reaction vessel, and a thermoplastic styrene-butadiene rubber (SBS) having a mass of 6.5% of the matrix pitch was added thereto, and the mixture was stirred while being fed.
  • SBS thermoplastic styrene-butadiene rubber
  • stirring was continued for 25 minutes to obtain a mixture B.
  • the colloid mill is started, the temperature is controlled at 200 ° C, the mixture B is sheared and ground on the grinding disc, and the cycle is repeated 3 times.
  • the mass of the matrix asphalt is added 2%.
  • the surfactant recycled to the finished road asphalt finished product.
  • the vulcanized rubber powder having a matrix asphalt mass of 8.5% was mixed with 90# heavy-duty asphalt, and stirred while being heated to form a fully plasticized, uniformly mixed mixture A.
  • the pump was opened, and the mixture A was pumped to the reaction vessel, and a thermoplastic styrene-butadiene rubber (SBS) having a mass of 5.5% of the matrix pitch was added, and the mixture was stirred while being added.
  • SBS thermoplastic styrene-butadiene rubber
  • stirring was continued for 25 minutes to obtain a mixture B.
  • the colloid mill is started, the temperature is controlled at 180 ° C, the mixture B is sheared and ground on the grinding disc, and the cycle is repeated 3 times.
  • the mass of the matrix asphalt is added 2%.
  • the composite modifier modified asphalt was evaluated in accordance with the national standard test. The test results are shown in the following table.
  • the Marshall test piece was prepared with the optimum asphalt dosage (oil-stone ratio) of 5.25%, and the AC-13F asphalt mixture was immersed in the Marshall test according to the JTJ052 ⁇ 2000 T0709-2000 procedure.
  • the test results are shown in the AC-13F grade water-immersed Marshall test results. -2), the residual stability is 85.8%, which satisfies the requirement that the Marshall residual stability of the Marshall test mixture design index of the dense grade modified asphalt mixture is greater than 85%.
  • the Marshall test piece was prepared with the optimum asphalt dosage (oil-stone ratio) 5.25%, and the freeze-thaw split test of AC-13F asphalt mixture was carried out according to the JTJ052-2000 ⁇ 0729-2000 procedure. The test results are shown in the AC-13F target mix ratio grading.
  • the freeze-thaw split test results (Table-3) have a residual strength ratio of 82.3% in the freeze-thaw split test, which satisfies the requirements of the freeze-thaw splitting residual strength ratio of the modified asphalt concrete mix design test index greater than 80%.
  • the rutting test piece was prepared by using 5.25% of asphalt, and the rutting test of AC-13F asphalt mixture was carried out according to JTJ052-2000 T0719-2000.
  • RUTMETER is also known as multi-wheeler funeral to evaluate the high temperature performance and rutting resistance of asphalt mixtures.
  • the test temperature is 60 ° C, the number of loadings is 16,000 times or the number of loadings when the rut depth is 6.35 mm. Oil-stone ratio
  • Fatigue life is defined as the number of tests when the mixture stiffness modulus is 50% of the initial stiffness modulus.
  • the trabecular bending failure test was carried out in accordance with the standard conditions specified in JTJ052-2000 T0715-1993, Test Procedure for Highway Engineering Asphalt and Asphalt Mixture. The test results are shown in Table -7.
  • Asphalt mixture performance evaluation test conclusion As AC-13F asphalt mixture is a suspended dense structure, it can better reflect the performance of asphalt cement, and also select the common granite gravel in the south, which is representative, so the above test design evaluation Asphalt road performance is well represented.
  • the composite modified asphalt can meet the relevant requirements of "Technical Specifications for Highway Asphalt Pavement Construction” (JTGF40-2004) "Technical Requirements for Polymer Modified Asphalt” SBS (ID); the water stability of asphalt mixture prepared by it can meet the "highway” Asphalt Pavement Construction Technical Specification (JTGF40-2004) "Technical Requirements for Asphalt Mixture Water Stability Inspection".
  • the composite modified asphalt has high performance, high temperature stability, fatigue performance, low temperature crack resistance and meets the requirements of the specification.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention porte sur un bitume routier modifié par un modificateur composite et sur son procédé de préparation. Le bitume routier modifié est obtenu par modification d'un asphalte de base par un modificateur composite constitué d'une poudre de caoutchouc vulcanisé mélangée avec un caoutchouc de styrène-butadiène (SBS) thermoplastique. Le procédé de préparation comprend les étapes consistant à : ajouter une certaine quantité de poudres de caoutchouc vulcanisé à un asphalte de base, ajouter un caoutchouc de styrène-butadiène thermoplastique (un modificateur) et un agent stabilisant et obtenir ledit bitume routier après cisaillement et broyage par un moulin à colloïdes. Le bitume routier modifié a une excellente résistance à l'orniérage et une excellente propriété anti-fissures à basse température.
PCT/CN2011/073230 2011-02-02 2011-04-24 Bitume routier modifié par un modificateur composite et son procédé de préparation WO2012103691A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201110034501 CN102061100B (zh) 2011-02-02 2011-02-02 一种复合改性剂改性道路沥青及其制备方法
CN2011100345018 2011-02-02

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Publication Number Publication Date
WO2012103691A1 true WO2012103691A1 (fr) 2012-08-09

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CN (1) CN102061100B (fr)
WO (1) WO2012103691A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111978743A (zh) * 2020-07-02 2020-11-24 苏州三创路面工程有限公司 一种耐候性强的橡胶改性沥青及其制备方法

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CN102887666A (zh) * 2012-09-26 2013-01-23 天津市市政工程研究院 一种具有高抗车辙能力的沥青混合料及其制备方法
CN102898851A (zh) * 2012-11-12 2013-01-30 天津市恒悦化工有限公司 一种sbs高性能改性沥青及其制备方法
CN103232711B (zh) * 2013-05-03 2015-08-12 中国海洋石油总公司 一种低温水工沥青及替代其混合料冻断温度的检测方法
CN103232712B (zh) * 2013-05-03 2015-08-12 中国海洋石油总公司 一种水工沥青及其制备方法
CN105271898A (zh) * 2014-12-12 2016-01-27 深圳市利安建材发展有限公司 沥青路面改性抗车辙剂及其制备方法
CN107179400B (zh) * 2017-04-27 2020-04-07 长安大学 一种沥青混合料车辙试验装置
CN107473635B (zh) * 2017-09-04 2020-09-01 东阳市新越建设有限公司 沥青混凝土及其制备工艺
CN109593371B (zh) * 2017-09-30 2021-07-09 神华集团有限责任公司 道路沥青改性剂和改性道路沥青及其制备方法以及沥青混合料
CN112724694A (zh) * 2020-12-25 2021-04-30 江苏亿虎沥青材料有限公司 一种储存性能稳定的环保型橡胶沥青及其制备方法
CN113649148B (zh) * 2021-08-19 2022-07-01 江苏凯伦建材股份有限公司 改性沥青的循环研磨生产方法

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CN111978743B (zh) * 2020-07-02 2022-02-22 苏州三创路面工程有限公司 一种耐候性强的橡胶改性沥青及其制备方法

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CN102061100A (zh) 2011-05-18
CN102061100B (zh) 2012-02-01

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