WO2022266733A1 - Procédé d'obtention de liant routier modifié avec de la poudre de caoutchouc de pneumatiques inutilisables - Google Patents

Procédé d'obtention de liant routier modifié avec de la poudre de caoutchouc de pneumatiques inutilisables Download PDF

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Publication number
WO2022266733A1
WO2022266733A1 PCT/BR2021/050279 BR2021050279W WO2022266733A1 WO 2022266733 A1 WO2022266733 A1 WO 2022266733A1 BR 2021050279 W BR2021050279 W BR 2021050279W WO 2022266733 A1 WO2022266733 A1 WO 2022266733A1
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WO
WIPO (PCT)
Prior art keywords
rubber powder
sieve
high shear
rubber
process according
Prior art date
Application number
PCT/BR2021/050279
Other languages
English (en)
Portuguese (pt)
Inventor
Luiz Henrique TEIXEIRA
Original Assignee
Cbb Industria E Comercio De Asfaltos E Engenharia Ltda
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.)
Filing date
Publication date
Application filed by Cbb Industria E Comercio De Asfaltos E Engenharia Ltda filed Critical Cbb Industria E Comercio De Asfaltos E Engenharia Ltda
Priority to PCT/BR2021/050279 priority Critical patent/WO2022266733A1/fr
Priority to BR102022012720-4A priority patent/BR102022012720B1/pt
Publication of WO2022266733A1 publication Critical patent/WO2022266733A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/18—Waste materials; Refuse organic
    • C04B18/20—Waste materials; Refuse organic from macromolecular compounds
    • C04B18/22—Rubber, e.g. ground waste tires
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • 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
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D121/00—Coating compositions based on unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J195/00—Adhesives based on bituminous materials, e.g. asphalt, tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/10—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention is applied to the technical field of modifying asphalt binders used in the construction of flexible pavement highways, by adding waste tires with their own characteristics in a high shear process also known as terminal blend, generating a stable binder and with better characteristics to absorb the efforts generated by the action of traffic and weather on the highways.
  • Asphalts modified by dust from waste tires are already known in the state of the art because they have characteristics that increase the performance of the pavement, reducing the harmful effects of traffic and bad weather, such as elastic recovery, high softening point and high rotational viscosity.
  • the blend terminal is intended for the production of the mixture for storage and is characterized by mixing the finely ground rubber with the hot binder in a process that promotes the grinding, agitation and circulation of the mixture.
  • a fusion occurs between petroleum asphalt cement (PAC) and rubber powder, through heating (180 Q C at 190 ° C) and mechanical movement promoted by low or high shear agitators.
  • PAC petroleum asphalt cement
  • the result is a stable modified binder that can be stored without separating the phases of the mixture. This process enables even greater quality control, since it is carried out in industrial plants.
  • processes that incorporate rubber into asphalt binders can be done by mixing by stirring at high or low shear.
  • various mixing processes by agitation in high shear existing in the state of the art make use of additives, such as solvents or stabilizers, or even subject the mixture to longer processes or multiple agitation processes.
  • Document EP439232B1 adopts mixing the particles in three stages, at temperatures above 150 ° C.
  • the components mentioned for mixing are rubber, bitumen and oils.
  • the first stage comprises mixing and heating under high shear the rubber particles and oil to 150-160 °C. Q C.
  • the temperature is reduced to 190-210 ° C and the mixture remains for about two hours to mature and optionally the other components of the asphalt are added.
  • Document CN108659556A presents a method of preparing high viscosity and high elasticity rubber-modified asphalt composed of SBS polymer (Styrene-Butadiene-Styrene), basic asphalt, natural asphalt, sulfur, rubber, stabilizer, mixing agent warm and anti-aging. These components are mixed in two steps: (i) preheating the base asphalt to 170-180 °C in a colloidal high shear mill and adding the rubber; (ii) passage of the mixture from step (i) to a development tank for cyclic stirring for about 2 hours and subsequent passage of the mixture through the high shear mill, with the addition of stabilizer and reaction for about 3 hours. This process is followed by the addition of the hot mixing agent, further heating and mixing and further cooling to obtain high elasticity.
  • SBS polymer Styrene-Butadiene-Styrene
  • a basic aspect of the present invention relates to a process for obtaining asphaltic binder modified with pneumatic rubber powder characterized by combining in a single pass, in a grinding process in a high shear dispersion reactor, the rubber powder with the asphalt cement subjected to heating at a temperature of 175 ° C to 200 ° C.
  • the process differs from the solutions proposed in the state of the art by obtaining a homogeneous mixture and with little residue at the end, which results from the grinding of the rubber by the high shear mill, during the mixture, in a single pass.
  • it has the advantage of not using dispersants or other additives to homogenize the mixture and providing a process with less mixing time, as it is more efficient, allowing the mixture to pass through the high-shear mill only once.
  • This application also differs from CN108659556A by using tire rubber for insertion in asphalt cement, while the prior art document uses SBS polymer.
  • This polymer is already widely used for insertion in asphalt to improve mechanical properties and durability.
  • asphalt cement differs from rubber from tires, as it is easier to disperse. Therefore, it is not trivial to replace the polymer source in asphalt mixtures, as proposed by the present application.
  • the present invention brings an environmental benefit, not explored by document CN108659556A.
  • the disclosed process begins with loading the rubber powder into a passing silo.
  • the powder then passes through a magnetic drawer to remove the metallic filings present in the raw material.
  • the rubber is pumped automatically to a storage silo and then to the high shear mill.
  • the rubber powder passes through an auxiliary metal detector to remove possible metallic residues.
  • a dosing screw controls the entry of rubber powder into the mill according to the dosage established in proportion to the CAP.
  • the insertion of raw materials into the shear mill is adjusted through the rotation of the feed pump motor and the dosing screw, which simultaneously control the entry of rubber dust and asphalt cement into the mill.
  • the high shear mill used in the process disclosed in the present invention is a high shear dispersion reactor type mill for continuous processes, consisting of three stages.
  • the first stage consists of a rotor and stator assembly, where asphalt and rubber powder are mixed. The mixture is pushed to the edges where there is a row of stator teeth, giving rise to the first grind.
  • the second stage of the mill has a rotor and stator assembly with four rows of teeth, two on the rotor and two on the stator, which promote a new grinding in a process called medium shear.
  • the rotor and stator set has six rows of teeth, three on the rotor and three on the stator, promoting a third grinding, known as fine shearing.
  • the final product is pumped into the storage tank.
  • the application of the high shear mill combined with the use of rubber in the appropriate granulometry and chemical composition guarantee a more homogeneous mixture, with a smaller amount of residues at the end of the process when compared to other methods of the state of the art, for example the use of high or low shear agitators.
  • the combination of raw materials can be done in a single pass in the high shear mill, resulting in a significant saving in mixing time.
  • the rubber dust from waste tires must fit into the following granulometric range: 0% to 5% of the particulate material passing through the #200 sieve (0.075 mm), 10% to 35% passing through the #80 sieve (0.180 mm), 40% to 80% passing the #50 sieve (0.300 mm), 60% to 100% passing the #40 sieve (0.420 mm) and 100% passing the #30 sieve (0.600), as well as having a content of polymeric and volatile material minimum 60%, carbon black content maximum 36% and ash content maximum 9%.
  • rubber-modified asphalt has a softening point of at least 50 Q C, penetration (25 Q C, 100 g, 5 s, 0.1 mm) from 3 mm to 7 mm, elastic recovery (25 Q C, 10 cm) min 50%, dynamic viscosity (175 Q C, spindle 3, 20 rpm) min 800 cP and max 2000 cP, flash point min 235 Q C.
  • the proportion of added rubber powder is in the range of 15% to 20%, and the proportion of added asphalt cement is in the range of 85% to 80%.
  • the rubber powder passes through magnets to remove waste steel filings, before being inserted into the high shear mill.
  • the inlet temperature of the asphalt binder in the high shear mill is between 150 ° C and 180 ° C.
  • a high shear homogenizing mixer with three dispersion stages is used, composed of three sets of rotors and stators having teeth at an angle of approximately 45 Q and drive shaft speed 1100 rpm.
  • the high shear dispersion reactor type mill used is the model Dispax Reactor DR-PB 2000/50 from the manufacturer IKA.
  • an H 2 S emission reducer is added to the mixture in the high shear mill.
  • the hhS emission reducing additive used is from the manufacturer ArrMaz, marketed under the name of deScent TBP and acts in the reincorporation, to the binder, of the hhS emitted during the modification.
  • Table 1 shows an example of the production process of the state of the art and Table 2 shows an example of the production process according to the present invention, for the same amount of modified asphalt.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Tires In General (AREA)

Abstract

L'invention concerne un procédé d'obtention d'un liant routier modifié avec de la poudre de caoutchouc de pneumatiques inutilisables, caractériser en ce qu'il consiste à combiner, en une seule étape, dans un procédé de broyage en réacteur de dispersion par cisaillement élevé, la poudre de caoutchouc de pneus inutilisables avec le ciment asphaltique, lesquels sont soumis à un chauffage à une température de 175°C à 200°C, la poudre de caoutchouc étant comprise dans la plage granulométrique suivante : 0 % à 5 % de la matière particulaire passant dans le tamis #200 (0,075 mm), 10 % à 35 % passant dans le tamis #80 (0,180 mm), 40 % à 80 % passant dans le tamis #50 (0,300 mm), 60 % à 100 % passant dans le tamis #40 (0,420) et 100 % passant dans le tamis #30 (0,600) ; et la poudre de caoutchouc présentant une teneur en matière polymère et volatile minimale de 60 %, une teneur en noir de carbone maximale de 36 % et une teneur en cendres maximale de 9 %.
PCT/BR2021/050279 2021-06-25 2021-06-25 Procédé d'obtention de liant routier modifié avec de la poudre de caoutchouc de pneumatiques inutilisables WO2022266733A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/BR2021/050279 WO2022266733A1 (fr) 2021-06-25 2021-06-25 Procédé d'obtention de liant routier modifié avec de la poudre de caoutchouc de pneumatiques inutilisables
BR102022012720-4A BR102022012720B1 (pt) 2021-06-25 2022-06-24 Processo para obtenção de ligante asfáltico modificado com pó de borracha de pneumáticos inservíveis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/BR2021/050279 WO2022266733A1 (fr) 2021-06-25 2021-06-25 Procédé d'obtention de liant routier modifié avec de la poudre de caoutchouc de pneumatiques inutilisables

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6380284B1 (en) * 1997-05-29 2002-04-30 Emile Lopez Method for continuous production of modified bituminous materials
US20100048771A1 (en) * 2008-08-22 2010-02-25 Osborn John D Reclaimed asphalt pavement
BRPI0611296A2 (pt) * 2005-05-03 2010-08-31 Innophos Inc material aglutinante de asfalto modificado empregando borracha moìda reticulada e métodos de fabricacão do aglutinante de asfalto modificado
BRPI0611302A2 (pt) * 2005-05-02 2010-08-31 Innophos Inc material aglutinante de asfalto modificado empregando borracha moìda e métodos para fabricar um aglutinante de asfalto modificado
US20130042793A1 (en) * 2011-08-17 2013-02-21 Christian Peregrine Asphalt modification processing system and method for asphalt additives
US20160096960A1 (en) * 2013-10-03 2016-04-07 Chandrasekaran R. Pillai Storage stabilized devulcanized tire rubber modified asphalt composition and the process for its preparation
US20180230309A1 (en) * 2008-09-24 2018-08-16 Wright Asphalt Products Company System and Method for High Throughput Preparation of Rubber-Modified Asphalt Cement
CN110003674A (zh) * 2019-04-29 2019-07-12 甘肃建投隧道工程有限公司 一种多聚磷酸复配Terminal blend胶粉改性沥青的制备方法
BR112020010306A2 (pt) * 2017-12-01 2020-11-17 Ergon, Inc. método para modificar um ligante asfáltico, ligante asfáltico modificado, e, mistura de pavimentação de asfalto.
US20210079599A1 (en) * 2019-04-23 2021-03-18 Manhole Adjusting Inc. Recycled asphalt compositions and methods thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6380284B1 (en) * 1997-05-29 2002-04-30 Emile Lopez Method for continuous production of modified bituminous materials
BRPI0611302A2 (pt) * 2005-05-02 2010-08-31 Innophos Inc material aglutinante de asfalto modificado empregando borracha moìda e métodos para fabricar um aglutinante de asfalto modificado
BRPI0611296A2 (pt) * 2005-05-03 2010-08-31 Innophos Inc material aglutinante de asfalto modificado empregando borracha moìda reticulada e métodos de fabricacão do aglutinante de asfalto modificado
US20100048771A1 (en) * 2008-08-22 2010-02-25 Osborn John D Reclaimed asphalt pavement
US20180230309A1 (en) * 2008-09-24 2018-08-16 Wright Asphalt Products Company System and Method for High Throughput Preparation of Rubber-Modified Asphalt Cement
US20130042793A1 (en) * 2011-08-17 2013-02-21 Christian Peregrine Asphalt modification processing system and method for asphalt additives
US20160096960A1 (en) * 2013-10-03 2016-04-07 Chandrasekaran R. Pillai Storage stabilized devulcanized tire rubber modified asphalt composition and the process for its preparation
BR112020010306A2 (pt) * 2017-12-01 2020-11-17 Ergon, Inc. método para modificar um ligante asfáltico, ligante asfáltico modificado, e, mistura de pavimentação de asfalto.
US20210079599A1 (en) * 2019-04-23 2021-03-18 Manhole Adjusting Inc. Recycled asphalt compositions and methods thereof
CN110003674A (zh) * 2019-04-29 2019-07-12 甘肃建投隧道工程有限公司 一种多聚磷酸复配Terminal blend胶粉改性沥青的制备方法

Non-Patent Citations (2)

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Title
VINAY HOSAHALLY NANJEGOWDA ET AL.: "Recyclability of rubber in asphalt roadway Systems: A review of applied research and advancement in technology", RESOURCES, CONSERVATION AND RECYCLING, vol. 155, 2020, pages 104655, XP086013225, ISSN: 0921-3449, Retrieved from the Internet <URL:hitps://doi.org/l0.1016/j.resconrec.2019.104655> DOI: 10.1016/j.resconrec.2019.104655 *
ZIXUAN CHEN ET AL.: "Low temperature and fatigue characteristics of treated crumb rubber modified asphalt afiter a long term aging procedure", JOURNAL OF CLEANER PRODUCTION, vol. 234, 2019, pages 1262 - 1274, XP085747424, ISSN: 0959-6526, Retrieved from the Internet <URL:https://doi.org/!0.1016/i.iclepro.2QI9.06.147> DOI: 10.1016/j.jclepro.2019.06.147 *

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BR102022012720B1 (pt) 2023-10-10

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