EP1052333A1 - Matériau de pavage élastique à bruit réduit et méthode pour l'appliquer - Google Patents

Matériau de pavage élastique à bruit réduit et méthode pour l'appliquer Download PDF

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Publication number
EP1052333A1
EP1052333A1 EP00109166A EP00109166A EP1052333A1 EP 1052333 A1 EP1052333 A1 EP 1052333A1 EP 00109166 A EP00109166 A EP 00109166A EP 00109166 A EP00109166 A EP 00109166A EP 1052333 A1 EP1052333 A1 EP 1052333A1
Authority
EP
European Patent Office
Prior art keywords
aggregate
pavement material
reduced noise
elastic
urethane binder
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00109166A
Other languages
German (de)
English (en)
Inventor
Kawamada Satoru
Masuda Kinji
Kuriki Minoru
Kobayashi Taisei Rotec Corporation Akinori
Fujita Taisei Rotec Corporation Hiroshi
Fukuda Taisei Rotec Corporation Takatomo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Taisei Rotec Corp
Original Assignee
Bridgestone Corp
Taisei Rotec Corp
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 Bridgestone Corp, Taisei Rotec Corp filed Critical Bridgestone Corp
Publication of EP1052333A1 publication Critical patent/EP1052333A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • E01C7/30—Coherent pavings made in situ made of road-metal and binders of road-metal and other binders, e.g. synthetic material, i.e. resin
    • 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
    • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
    • E01C13/06—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003
    • E01C13/065—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003 at least one in situ layer consisting of or including bitumen, rubber or plastics

Definitions

  • the present invention relates to a pavement which is applied to roadways and has a noise reduction effect and a vibration reducing effect due to the elasticity, air permeability, and sound absorption thereof. Further, the present invention relates to a reduced noise elastic pavement material which has a structure in which a hard aggregate and an elastic aggregate are bonded together by a urethane binder, and to a method of applying the reduced noise elastic pavement material.
  • a pavement material formed by bonding rubber chips together by a binder has high elasticity and has been mainly used for sidewalks and sport stadiums from the aspects of impact absorption when a person walks thereon and safety when the person stumbles.
  • an example of a pavement material for roadways which results in less noise is a water draining pavement. It is known that a tire noise is reduced by air permeability and sound absorption due to voids formed at the drain pavement.
  • a drain pavement generally has a noise reducing effect which allows a reduction in noise of about 3 dB.
  • This reduction in noise is due to the reduction in tire noise resulting from air permeability and sound absorption due to the voids formed at the drain pavement.
  • it is difficult to obtain an even greater noise reducing effect.
  • An object of the present invention is to provide a reduced noise elastic pavement material which is formed by bonding a hard aggregate and an elastic aggregate together by a urethane binder, and in which less noise effect due to elasticity, air permeability, and sound absorption and a reduction in vibration due to elasticity can be obtained, and to a method of applying the pavement material.
  • a reduced noise elastic pavement material which includes a hard aggregate, an elastic aggregate, and a urethane binder which bonds the hard aggregate and the elastic aggregate together, wherein the hard aggregate is 10 to 75 % by volume of the total volume of the hard aggregate and the elastic aggregate, and a two-component urethane binder is used as the urethane binder.
  • an applying method of reduced noise elastic pavement material including the steps of; carrying out a milling step and/or a blast cleaning step by a shot-blasting on a road surface; applying a primer to the road surface; mixing a hard aggregate, an elastic aggregate, a urethane binder, or the like by using a mixer to prepare a mixture; applying the mixture to the road surface; and compacting the mixture, wherein the hard aggregate is 10 to 75 % by volume of the total volume of the hard aggregate and the elastic aggregate, and a two-component urethane binder is used for the urethane binder.
  • a rubber chip material having a diameter of 10 mm or less is preferably used for the elastic aggregate and colored rubber chips are used for a portion of or entire elastic aggregate.
  • the hard aggregate is preferably used, which includes at least 5 % by weight of a component which passes through a sieve opening of 1.18 mm.
  • a two-component urethane binder is used as the binder and is formed by an isocyanate group terminated prepolymer and a polyol.
  • An organic silane is preferably added to the urethane binder in an amount of 0.1 to 5 % by weight based on the weight of the urethane binder.
  • Embodiments of the present invention will be described mainly with respect to a first aspect of the present invention.
  • Generation of tire noise from a road surface is caused by vibration which is generated by the contact between a tire tread and the road surface.
  • Main sources of noise are the noise generated by the vibration of a tread pattern or a sidewall, and the noise generated by resonance of sound produced by the road surface and grooves such as rib grooves, lug grooves, or the like.
  • the vibration is interfered with by providing the pavement material with superior elasticity so as to reduce the noise which is caused by the vibration of the tread pattern or the sidewall. Further, the same noise reducing effect as that of a drain pavement material, which is caused by the voids, can be expected.
  • a pavement material formed by bonding rubber chips together by a binder has superior elasticity and has a high noise reducing effect because of the voids formed therein.
  • the amount of flexure with respect to a load is large.
  • the turning response of a vehicle at the time of steering is delayed due to the flexure of the road surface, such that the driving stability of the vehicle significantly deteriorates.
  • the skid resistance of a vehicle on this pavement when the pavement is wet is lower than that on an ordinary road surface.
  • the strength of the pavement material is not sufficient.
  • the skid resistance depends on the amount of the hard aggregate.
  • the amount of the hard aggregate In order to ensure a skid resistance of 60 BPN or greater (which is measured by using a portable skid resistance tester), the amount of the hard aggregate must be 10 % or more of the total amount of the aggregate (see Fig. 6). If the proportion of the hard aggregate is small, the driving stability is affected not only by the skid resistance but also by an increase in the amount of flexure due to the weight of the vehicle. If the amount of the hard aggregate is too large, elasticity deteriorates such that effect of resulting in less noise is adversely affected (see Fig. 6). Accordingly, the hard aggregate is 10 to 75 % (volume ratio), preferably 50 to 75% (volume ratio) of the total amount of the aggregate. As illustrated in Fig.
  • the grain size of the hard aggregate is desirably such that 5 % or more (weight ratio) of the hard aggregate is fine grain components which pass through a sieve opening of 1.18 mm.
  • the surface of the fine grain components is rough like sandpaper to provide an anti-skid effect.
  • the hard aggregate generally includes, but is not limited to including, a natural aggregate such as river gravel, river sand or the like and a synthetic aggregate such as crushed stone, slag, ceramics or the like. Stone, sand or the like is used in the hard aggregate in order to ensure the strength of the pavement material and the wear resistance thereof. Further, stone, sand or the like which is used in the hard aggregate is exposed on the surface of the pavement material so as to provide the anti-skid effect. From the viewpoint of skid resistance, the grain size of the hard aggregate is desirably such that the hard aggregate includes 5 % or more (weight ratio) of fine grain components which pass through a sieve opening of 1.18 mm. The surface of the fine grain components is rough like sandpaper to provide the anti-skid effect.
  • Rubber chips i.e., small pieces of rubber or a powder of rubber, are used to provide the pavement with elasticity. Rubber chips having a grain diameter of from 1 mm or less to around 10 mm are suitable. Rubber chips having a grain diameter of 1 to 5 mm are preferable because they are effective in providing elasticity and forming voids.
  • the rubber chips may be made of natural rubber or of a synthetic rubber. Further, rubber chips, which are made by mechanically grinding a vulcanized rubber product such as discarded tires or the like, may be used.
  • the hardness in the present invention means the JIS ⁇ A hardness.
  • the hard aggregate means an aggregate having a hardness of 95 degrees or more.
  • the elastic aggregate refers to an aggregate having a hardness of 90 degrees or lower.
  • the rubber chips in the example which will be described later have a hardness of about 65 degrees.
  • the hardness of a discarded tire is generally 60 to 70 degrees, and the hardness of a discarded tire to which heat is applied is about 80 to 90 degrees.
  • a urethane binder is used to bond the aggregates so as to form the pavement material. It is preferable to use a two-component urethane binder which is prepared by mixing an isocyanate group terminated prepolymer with a polyol with an equivalent ratio of the hydroxyl groups to the isocyanate groups being, for example, 0.2 to 0.8.
  • the isocyanate group terminated prepolymer is such that the isocyanate content is 5 to 25 %, the viscosity is 1000 to 5000 CP (25°C), and the average number of functional groups of the isocyanate group terminated prepolymer is 2 to 3.
  • isocyanate for the prepolymer examples include, for example, a diphenylmethane diisocyanate-based polyisocyanate.
  • Polyalkylene glycol having a molecular weight of 1000 to 3000 is usually used as an active hydrogen compound used for modification.
  • a preferable polyol has an average number of functional groups of 2 to 6, and an average molecular weight of 1000 or less. Further, one-half of or more than one-half of the hydroxyl groups of the polyol are preferably primary hydroxyl groups in view of the reactivity thereof Examples of the polyol include ethylene glycol, diethylene glycol, polyalkylene ether glycol, or the like.
  • the hardening time is determined mostly by the temperature at the time of laying the pavement material and the period of time until traffic is allowed thereon, it is possible to adjust the hardening time by adjusting the mixing ratio of the isocyanate group terminated prepolymer to the polyol.
  • the mixing ratio can be appropriately selected from the range of 0.2 to 1.0 of the equivalent ratio of the hydroxyl groups/the isocyanate groups.
  • a two-component urethane binder As compared with the case of using a one-component urethane binder, in the case of using a two-component urethane binder, it is easy to adjust the hardening time and is generally possible to reduce the hardening time. Accordingly, it is stipulated in the present invention that a two-component urethane binder must be used. It is also possible to adjust the hardening speed by using a known hardening accelerating agent such as an amine-based or a metallic-based hardening accelerating agent. It is desirable that the binder is included in an amount of 15 to 30 % by volume of the total amount of the pavement material from the viewpoint of the bonding strength of the aggregates.
  • an organic silane By adding 0.1 to 10 % by weight of an organic silane into the urethane binder, the bonding strength between the urethane binder and the aggregates can be increased and improvements in the strength and the durability of the pavement material can be achieved.
  • the organic silane include an epoxy-based or a mercapto-based organic silane.
  • coloring can be effected by mixing a coloring agent with the urethane binder.
  • a coloring agent which is 1 to 10 % by weight of the urethane binder.
  • the coloring agent include carbon-based coloring agents when a black color is desired and titanium-based coloring agents when a white color is desired.
  • the pavement material can also be colored by using colored rubber chips, for example, colored rubber chips of EPDM, for the elastic aggregate, or by using a synthetic aggregate which is formed from colored ceramics or the like.
  • the method of applying (laying) the pavement material is as follows.
  • the hard aggregate and the elastic aggregate are mixed together and the binder is added to the mixture to prepare the pavement material.
  • the urethane binder may be prepared by mixing in advance an isocyanate group terminated prepolymer, a polyol, and optionally a coloring agent, an organic silane, a hardening accelerating agent or the like.
  • the urethane binder may be prepared such that the isocyanate group terminated prepolymer and the polyol are mixed together, and then the coloring agent, the organic silane, the hardening accelerating agent, or the like is mixed with the mixture thereafter.
  • the temperature at the time of mixing the aggregates and the binder may be an ordinary temperature. When the temperature is low, hardening is slow, and when the temperature is high, temperature adjustment may be required because hardening is accelerated.
  • the noise reduction effect is measured in the following manner. Noise (dB) in a vicinity of a tire of a passenger vehicle running on a dense grain pavement was measured, and noise (dB) in a vicinity of a tire of a passenger vehicle running on the pavement material in accordance with the present invention was measured. The difference was calculated and is defined as the noise reduction effect. The larger the difference, the superior the noise reduction effect.
  • Figs. 2 through 5 show structural examples of the pavement laying cases 1 to 4 of Table 1.
EP00109166A 1999-05-11 2000-05-08 Matériau de pavage élastique à bruit réduit et méthode pour l'appliquer Withdrawn EP1052333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12956199 1999-05-11
JP12956199A JP4357029B2 (ja) 1999-05-11 1999-05-11 低騒音用弾性舗装材及び低騒音用弾性舗装施工法

Publications (1)

Publication Number Publication Date
EP1052333A1 true EP1052333A1 (fr) 2000-11-15

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EP (1) EP1052333A1 (fr)
JP (1) JP4357029B2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053839A1 (fr) * 2000-12-28 2002-07-11 Bridgestone Corporation Materiel de revetement elastique contenant des dechets de caoutchouc
EP1705290A2 (fr) * 2005-03-24 2006-09-27 Tokai Rubber Industries, Ltd. Matériau de pavage élastique drainant
US7121761B2 (en) 2003-05-28 2006-10-17 Woodruff Paul N Paved surface configured for reducing tire noise and increasing tire traction and method and apparatus of manufacturing same
WO2016051382A1 (fr) * 2014-10-03 2016-04-07 Italcementi S.P.A. Béton élastique léger sous-couche de base avec du caoutchouc recyclé à partir de pneus mis au rebut avec réduction de bruit d'impact à la marche
WO2024003435A1 (fr) * 2022-06-29 2024-01-04 Reciclaje De Neumaticos Y Cauchos S.L. Matériau pour revêtement insonorisant et procédé de fabrication

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002266312A (ja) * 2001-03-06 2002-09-18 Taisei Rotec Corp 低騒音用弾性舗装施工法
JP2007070945A (ja) * 2005-09-08 2007-03-22 Bridgestone Corp 弾性舗装面の施工方法
EP1996765A1 (fr) * 2006-03-15 2008-12-03 Basf Se Procédé pour fixer des voies de communication
JP6788369B2 (ja) * 2016-03-31 2020-11-25 住友大阪セメント株式会社 コンクリート舗装及びその施工方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869421A (en) * 1970-07-10 1975-03-04 Chevron Res Resilient oil-extended polyurethane surfaces
GB1585029A (en) * 1977-05-18 1981-02-18 Naphtachimie Sa Coverings
DE3109392A1 (de) * 1981-03-12 1982-10-21 Wolfgang 4790 Paderborn Neubauer "bodenbelag fuer sportstaetten und verfahren zu seiner herstellung"
US4564310A (en) * 1984-06-08 1986-01-14 Edmund Thelen Resilient paving composition for playfields sports fields and recreation areas
WO1995025076A1 (fr) * 1994-03-17 1995-09-21 Yamabishi Industrial Co. Ltd Composition pour revêtement routier et procede
DE19651749A1 (de) * 1996-12-12 1998-06-18 Claus Dieter Ihle Verfahren und Herstellung einer stabilen tragfähigen Abschlußschicht von Fahrbahnbelägen im Straßen-, Wege- und Platzbau und Tiefbau
EP0957203A2 (fr) * 1998-05-11 1999-11-17 Taisei Rotec Corporation Matériau de pavage élastique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869421A (en) * 1970-07-10 1975-03-04 Chevron Res Resilient oil-extended polyurethane surfaces
GB1585029A (en) * 1977-05-18 1981-02-18 Naphtachimie Sa Coverings
DE3109392A1 (de) * 1981-03-12 1982-10-21 Wolfgang 4790 Paderborn Neubauer "bodenbelag fuer sportstaetten und verfahren zu seiner herstellung"
US4564310A (en) * 1984-06-08 1986-01-14 Edmund Thelen Resilient paving composition for playfields sports fields and recreation areas
WO1995025076A1 (fr) * 1994-03-17 1995-09-21 Yamabishi Industrial Co. Ltd Composition pour revêtement routier et procede
DE19651749A1 (de) * 1996-12-12 1998-06-18 Claus Dieter Ihle Verfahren und Herstellung einer stabilen tragfähigen Abschlußschicht von Fahrbahnbelägen im Straßen-, Wege- und Platzbau und Tiefbau
EP0957203A2 (fr) * 1998-05-11 1999-11-17 Taisei Rotec Corporation Matériau de pavage élastique

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053839A1 (fr) * 2000-12-28 2002-07-11 Bridgestone Corporation Materiel de revetement elastique contenant des dechets de caoutchouc
US7121761B2 (en) 2003-05-28 2006-10-17 Woodruff Paul N Paved surface configured for reducing tire noise and increasing tire traction and method and apparatus of manufacturing same
EP1705290A2 (fr) * 2005-03-24 2006-09-27 Tokai Rubber Industries, Ltd. Matériau de pavage élastique drainant
EP1705290A3 (fr) * 2005-03-24 2007-07-04 Tokai Rubber Industries, Ltd. Matériau de pavage élastique drainant
US7384469B2 (en) 2005-03-24 2008-06-10 Tokai Rubber Industries, Ltd. Porous elastic pavement material
WO2016051382A1 (fr) * 2014-10-03 2016-04-07 Italcementi S.P.A. Béton élastique léger sous-couche de base avec du caoutchouc recyclé à partir de pneus mis au rebut avec réduction de bruit d'impact à la marche
WO2024003435A1 (fr) * 2022-06-29 2024-01-04 Reciclaje De Neumaticos Y Cauchos S.L. Matériau pour revêtement insonorisant et procédé de fabrication
ES2958035A1 (es) * 2022-06-29 2024-01-31 Reciclaje De Neumaticos Y Cauchos S L Material para pavimento absorbente de ruidos y procedimiento de fabricación

Also Published As

Publication number Publication date
JP2000319501A (ja) 2000-11-21
JP4357029B2 (ja) 2009-11-04

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