CA2015765A1 - Noise abatement element - Google Patents
Noise abatement elementInfo
- Publication number
- CA2015765A1 CA2015765A1 CA 2015765 CA2015765A CA2015765A1 CA 2015765 A1 CA2015765 A1 CA 2015765A1 CA 2015765 CA2015765 CA 2015765 CA 2015765 A CA2015765 A CA 2015765A CA 2015765 A1 CA2015765 A1 CA 2015765A1
- Authority
- CA
- Canada
- Prior art keywords
- binder
- reinforcing member
- mould
- granular material
- mix
- 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.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0011—Plank-like elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Laminated Bodies (AREA)
- Building Environments (AREA)
Abstract
RBP File No. 5590-001 ABSTRACT OF THE DISCLOSURE
A noise abatement element is formed of a crumb rubber material and a binder and includes a relatively rigid reinforcing member which is located within the element. The reinforcing member is preferably in the form of a length of laminated wood.
A noise abatement element is formed of a crumb rubber material and a binder and includes a relatively rigid reinforcing member which is located within the element. The reinforcing member is preferably in the form of a length of laminated wood.
Description
2 ~
RBP File No. 5590-001 Title Noise Ab~tement Element FIELD OF THE IMV~TION
This invention relates to noise abatement elements and barriers.
BACKGE~OUND OF TIIE INVENTION
Noise abatement barriers are frequently provided, for example, along the edges of highways to protect adjacent areas from traffic noise. Such barriers come in varied forms and are often abricated from, for example, concrete or corrugated metal. However these forms of barriers tend to reflect sound rather than absorb it, such that the barriers may simply redirect the trafic noise towards the opposite side of the highwa~. Concrete barriers are o~ten formed o a plurality o concrete slabs which are located between supporting uprights and mounted on top of one another to form walls. Although construction of the barrier may only requlre positioning and anchoring of the supporting uprights and location of the prefabricated slabs between the uprights, the weight of the slabs necessitates the provision of heavy moving equipment for the transporting and positioning the slabs.
Although metal barriers are generally less substantial than concrete barriers and may be lighter in weight, mat~rial costs for metal barriers are relatively high.
Various other means or providing noise abatement barriers have been proposed, including those disclosed in the below listed U.S. patents:
No. 3,948l009 issued April 6, 1976 to Bernhard No. 4,566,558 issued January ~8, 1986 to LinX, Jr. et al No. 4,643,271 issued Feb. 17, 1987 to Coburn No. 3,698,993 issued Oct. 17, 1976 to Rauh 2 ~
No. 4,1~3,495 issued March 13, 1979 to Hintæ
No. 3,~61,682 issued June 8, 1976 to Dausch et ~1 .
Bernhard describes sound a insulating wall comprising elements formed of rubber shavings with a resin binder. A number of different examples of element composition are described, including one in which the resin binder is cellular and has a predominantly closed cell structure, which is described as having good sound reflective qualities, and further examples in which the space between the rubber shavings is only partly filled with binder, and which may be filled with open cell foam waste, to provide high sound absorbtion. For this form of element, the side facing away from the sound source is provided with a closa textured covering for reflecting back sound waves which have penetrated through the element. The side of the element facing the sound source may be provided with an absorbtion layer of stone wool or soft foam material and this is covered with a synthetic fiber fleece. The patent also discloses the use of reinforcing elements which are located between the boards, and the possibility of providing mechanical reinforcements such as wire inserts in the boards is also mentioned.
The edges of the boards may be profiled so that, when several boards are placed one upon the other, they en~age with each other by the corresponding profiles.
Link, Jr. et al. describes a noise barrier formed of a slab of plastic foam sandwiched between ou~er sheets of plastic. The sheet of plastic facing the sound source is perforated over a number of recesses formed in the plastic foam, the recesses being filled with a sound absorbing material such as rubber granules. Reinforcing members are provided in the form of channel members embedded in the faces o-f the plastic foam.
2 ~ 6 ~
Dausch et al. describes a sound absorbing wall element formed of two layers, one layer comprising shredded rubber and a binder and a second backing layer comprising loose rubber shreds supported in a sheet metal frame.
Loose shredded rubber is also used as a sound absorbing material in Hintz. The patent discloses a sound absorbing panel formed of two sheets of corrugated sheet metal, the front sheet being perforated. The shredded rubber is held in a space between the rear sheet and a wire mesh located between the sheets.
A somewhat different form of sound barrier is described in the Coburn patent, which discloses the use of gabions, a gabion being a wire cage which is normally filled with rocks for use in erosion control and the like.
As disclosed by the patent, a sound barrier may be form~d of a stack of gabions, the gabions closest to the highway being filled with shredded tires and the reaxmost gabions being filled with crushed stone and sound absorbing material such as shredded polystyrene foam.
Rauh describes a sound deadening sheet material formed of a foamed, closed shell sheet with cells of various sizes spaced throughout the sheet and discrete small particles of high specific gravity distributed through the sheet. It is suggested tha~ the discrete particles be formed of metallic oxide. One side of the sheet is a smooth skin and on the other side of the sheet the skin is torn to provide a fibre-like surface to partially dissipate the initial sound waves striking the surface.
7 ~ ~
SUMNARY OF TEE INVENTION
According to a first embodiment of the present invention ~here is provided a noise abatement element formed of a granular material and a binder and including a relatively rigid reinforcing member located within the element.
Pref~rably, the granular material and binder are in the form of granular rubber and a polymer which form a flexible, sound absorbent material. The reinforciny member assists in providing the element with additional rigidity. Preferably also, the reinforcing member extends over the length of the element and is in the form of an I-shaped beam of laminated wood.
According to a second aspect of the present invention there is provided a noise abatement barrier comprising at least two spaced uprights and a plurality of elongate noise abating elements extending between the uprights and located one on top of another to form a wall.
Each element is formed of a crumb rubber and binder mix and includes a relatively rigid reinforcing member located wit~lin the element.
According to a third aspect of the present invention there is provided a method of producing a noise abatement element comprising the steps: providing a mix of granular material and a binder; providing a mould de~ining an elongate form; locating a relatively rigid elongate reinforcing member in the mould; adding said mix to the mould; curing the binder to solidify the mix in the mould; and removing the solidified mix from the mould.
30 BRI~F DESCRIPTION OF T~IE DRAWINGS
These and other aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
~ 57~
Figure 1 is a front elevation o~ a noise abatement barrier in accordance with a preferred embodiment of khe present inven~ion, Figure 2 is a top plan view of the noise abatement barrier of Figure l;
Figure 3 is a sectional view on line 3-3 of Figure 2, showing a section ~f a noise abatemant element of the barrier of Figuxe 2; and Figure 4 is a somewhat simplified illustration of the method of producing the noise abatement element of Figure 3.
DETAILED DESCRIPTION OF DRAWINGS
Reference is first made to Figures 1 and 2 of the drawings, which show a portion of a noise barrier 10 in accordance with a preferred embodiment of the present invention. The barrier 10 comprises a plurality of spaced uprights 12, 14 with a plurality of noise abating elements 16 extending therebetween and located one on top of another to form a wall. The uprights 12, 14 are in the form of I-beams which are securely mounted in the qround.
Typically, the bases of the upright~ 12, 14 will be set in concrete or the like. The inwardly directed channels 18, 20 provided by the uprights 12, 14 receive the ends of the elements, the central web portions 19, 21 of the uprights being spaced apart a distance slightly longer than the length of the elements such that the elements may be located between the uprights~ The uprights 12, 14 and the elements 16 are sized such that the ends of the elements are a snug fit in the channels 18, 20.
Only two uprights are shown in Figures 1 and 2, though a typical barrier would comprise a large number of spaced uprights and elements.
The elements 16 are generally elongate in form and comprise a mix of recycled crumb rubber and a binding agent. The crumb rubber is preferably formed by shredding discarded vehicle tires. The binding agent is preferably a polymer.
The resulting composite is fairly flexible and in order to provide the element 16 with some rigidity, each element contains a reinforcing element, in the form of a length of laminated wood 2~ of an I~cross-section which extends over the length of each element. The length of wood 22 provides sufficient rigidity to enable the elements to be easily handled and transported.
The element also contains a fire retardent and may contain colour pigment, depending on the desired colour of the element.
The elements 16 may be of plain rectangular cross-section, shown in Figure 3 of the drawings, but may also be provided with other cross-sections, for example, the element top surface may be provided with a tongue and the bottom surface provided with a corresponding groove such that adjacent elements may interlock to provide a more effecti~e sound isolating interface between adjacent elements and also to add to the structural strength of the wall formed by the elements.
The method o~ producing the sound elements will now be described, with reference to Figure 4 of the drawings.
The elements are formed by first mixing a quantity of rubber crumbs with a prepolymer. The mix 40 is then poured i.nto a metal mould 42 which defines an elongate form identical to the desired form of the element. ~ length of wood 22 is mounted in the mould such 2 ~ ~ ~ 7 ~ ~
that the crumb and prepolymer mix encapsulates the wood.
The prepolymer is then cured, the curing process being controlled by heating the mould 42 using suitable heating means ~4, and applying pressure to the mix by providing the mould 42 with a moveable wall 46, the pressure force being provided by means of a hydraulic actuator 48, to bind the granular material and the wood to form an integral ~lement, which may then ~e removed from the mould.
The components of the mix and the dimensions of ~he element may be varied to provide elements suitable for various purposes. The crumb rubber, as mentioned above, is preferably formed of shredded vehicle tires, the crumbs preferably having a diameter of approximatel~ one quarter of an inch. If the crumbs are substantially similar in diameter, the resulting element will be less dense than an element formed with crumbs of more varied sizes. The density of the element may also be increased by increasing the heat and pressure used during curing of the binder.
The binder is prefer~bly a polyurethane based material, such as FLEXILON 40:2 (Trade-Mark), a solvent free diphenyl meth~ne di-isoyanate polyether prepolymer (MDI) available from Rosehill P~lymers Ltd., of Sowerby Bridge, England. The binder is preferably added to the crumb rubber in ratio of 10% by weight to the total weight of crumb rubber. The fire retardent, and the colour pigment, where present, are also mixed with the binder.
For the preferred element composition a flame retardent chemical such as Fyrol (Trade-Mark) PCF, a tri (B-chloroisopropyl) phosphate 2-chloro-1-propenol, phosphate (3:1), as available from Stauffer Chemical Company of Westport, Connecticut, U.S.A. may be used.
Although the dimensions of elements may vary it is preferable to have the element and reinforcing member 2 ~
dimensions of generally similar proportions. One example of an element is set out below:
Element width (A) = 5 3/4"
Element depth (B) = 10"
Reinforcing member overall depth (C) = 9"
Reinforcing member flange width (D) = 1 3/4~
Reinforcing member flange thickness (E) = 1 1/2"
Reinforcing member web thickness (F) = 3/4~
The resultin~ elements are relatively light, and thus may be transported and installed with minimal need for heavy equipment/ are substantially weatherproof and have good sound reflective and absorbtion properties.
Also, the use of relatively inexpensive materials to form the elements and the savings in transportation and installation when compared to conventional barriers, allows for the provision of barriers in accordance with the present invention at advant:ageous cost. In addition, use of resilient material ~or much of the element allows the element to absorb minor bumps without damage, and if, for example, the bump was from a vehicle, the vehicle would likely sustain only minor damage, if any. In more violent collisions the elements will give-way and the reinforcing mamber break. This would likely result in reduced passenger injury and vehicle damage when compared ~o a collision with, for example, a rigid concrete noise bar~rier.
It will be clear to those skilled in the art that the present invention is not limited to the particular uses described above and further that various modifications and improvements may be made to the invention without departin~ from the scope of the present invention.
RBP File No. 5590-001 Title Noise Ab~tement Element FIELD OF THE IMV~TION
This invention relates to noise abatement elements and barriers.
BACKGE~OUND OF TIIE INVENTION
Noise abatement barriers are frequently provided, for example, along the edges of highways to protect adjacent areas from traffic noise. Such barriers come in varied forms and are often abricated from, for example, concrete or corrugated metal. However these forms of barriers tend to reflect sound rather than absorb it, such that the barriers may simply redirect the trafic noise towards the opposite side of the highwa~. Concrete barriers are o~ten formed o a plurality o concrete slabs which are located between supporting uprights and mounted on top of one another to form walls. Although construction of the barrier may only requlre positioning and anchoring of the supporting uprights and location of the prefabricated slabs between the uprights, the weight of the slabs necessitates the provision of heavy moving equipment for the transporting and positioning the slabs.
Although metal barriers are generally less substantial than concrete barriers and may be lighter in weight, mat~rial costs for metal barriers are relatively high.
Various other means or providing noise abatement barriers have been proposed, including those disclosed in the below listed U.S. patents:
No. 3,948l009 issued April 6, 1976 to Bernhard No. 4,566,558 issued January ~8, 1986 to LinX, Jr. et al No. 4,643,271 issued Feb. 17, 1987 to Coburn No. 3,698,993 issued Oct. 17, 1976 to Rauh 2 ~
No. 4,1~3,495 issued March 13, 1979 to Hintæ
No. 3,~61,682 issued June 8, 1976 to Dausch et ~1 .
Bernhard describes sound a insulating wall comprising elements formed of rubber shavings with a resin binder. A number of different examples of element composition are described, including one in which the resin binder is cellular and has a predominantly closed cell structure, which is described as having good sound reflective qualities, and further examples in which the space between the rubber shavings is only partly filled with binder, and which may be filled with open cell foam waste, to provide high sound absorbtion. For this form of element, the side facing away from the sound source is provided with a closa textured covering for reflecting back sound waves which have penetrated through the element. The side of the element facing the sound source may be provided with an absorbtion layer of stone wool or soft foam material and this is covered with a synthetic fiber fleece. The patent also discloses the use of reinforcing elements which are located between the boards, and the possibility of providing mechanical reinforcements such as wire inserts in the boards is also mentioned.
The edges of the boards may be profiled so that, when several boards are placed one upon the other, they en~age with each other by the corresponding profiles.
Link, Jr. et al. describes a noise barrier formed of a slab of plastic foam sandwiched between ou~er sheets of plastic. The sheet of plastic facing the sound source is perforated over a number of recesses formed in the plastic foam, the recesses being filled with a sound absorbing material such as rubber granules. Reinforcing members are provided in the form of channel members embedded in the faces o-f the plastic foam.
2 ~ 6 ~
Dausch et al. describes a sound absorbing wall element formed of two layers, one layer comprising shredded rubber and a binder and a second backing layer comprising loose rubber shreds supported in a sheet metal frame.
Loose shredded rubber is also used as a sound absorbing material in Hintz. The patent discloses a sound absorbing panel formed of two sheets of corrugated sheet metal, the front sheet being perforated. The shredded rubber is held in a space between the rear sheet and a wire mesh located between the sheets.
A somewhat different form of sound barrier is described in the Coburn patent, which discloses the use of gabions, a gabion being a wire cage which is normally filled with rocks for use in erosion control and the like.
As disclosed by the patent, a sound barrier may be form~d of a stack of gabions, the gabions closest to the highway being filled with shredded tires and the reaxmost gabions being filled with crushed stone and sound absorbing material such as shredded polystyrene foam.
Rauh describes a sound deadening sheet material formed of a foamed, closed shell sheet with cells of various sizes spaced throughout the sheet and discrete small particles of high specific gravity distributed through the sheet. It is suggested tha~ the discrete particles be formed of metallic oxide. One side of the sheet is a smooth skin and on the other side of the sheet the skin is torn to provide a fibre-like surface to partially dissipate the initial sound waves striking the surface.
7 ~ ~
SUMNARY OF TEE INVENTION
According to a first embodiment of the present invention ~here is provided a noise abatement element formed of a granular material and a binder and including a relatively rigid reinforcing member located within the element.
Pref~rably, the granular material and binder are in the form of granular rubber and a polymer which form a flexible, sound absorbent material. The reinforciny member assists in providing the element with additional rigidity. Preferably also, the reinforcing member extends over the length of the element and is in the form of an I-shaped beam of laminated wood.
According to a second aspect of the present invention there is provided a noise abatement barrier comprising at least two spaced uprights and a plurality of elongate noise abating elements extending between the uprights and located one on top of another to form a wall.
Each element is formed of a crumb rubber and binder mix and includes a relatively rigid reinforcing member located wit~lin the element.
According to a third aspect of the present invention there is provided a method of producing a noise abatement element comprising the steps: providing a mix of granular material and a binder; providing a mould de~ining an elongate form; locating a relatively rigid elongate reinforcing member in the mould; adding said mix to the mould; curing the binder to solidify the mix in the mould; and removing the solidified mix from the mould.
30 BRI~F DESCRIPTION OF T~IE DRAWINGS
These and other aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
~ 57~
Figure 1 is a front elevation o~ a noise abatement barrier in accordance with a preferred embodiment of khe present inven~ion, Figure 2 is a top plan view of the noise abatement barrier of Figure l;
Figure 3 is a sectional view on line 3-3 of Figure 2, showing a section ~f a noise abatemant element of the barrier of Figuxe 2; and Figure 4 is a somewhat simplified illustration of the method of producing the noise abatement element of Figure 3.
DETAILED DESCRIPTION OF DRAWINGS
Reference is first made to Figures 1 and 2 of the drawings, which show a portion of a noise barrier 10 in accordance with a preferred embodiment of the present invention. The barrier 10 comprises a plurality of spaced uprights 12, 14 with a plurality of noise abating elements 16 extending therebetween and located one on top of another to form a wall. The uprights 12, 14 are in the form of I-beams which are securely mounted in the qround.
Typically, the bases of the upright~ 12, 14 will be set in concrete or the like. The inwardly directed channels 18, 20 provided by the uprights 12, 14 receive the ends of the elements, the central web portions 19, 21 of the uprights being spaced apart a distance slightly longer than the length of the elements such that the elements may be located between the uprights~ The uprights 12, 14 and the elements 16 are sized such that the ends of the elements are a snug fit in the channels 18, 20.
Only two uprights are shown in Figures 1 and 2, though a typical barrier would comprise a large number of spaced uprights and elements.
The elements 16 are generally elongate in form and comprise a mix of recycled crumb rubber and a binding agent. The crumb rubber is preferably formed by shredding discarded vehicle tires. The binding agent is preferably a polymer.
The resulting composite is fairly flexible and in order to provide the element 16 with some rigidity, each element contains a reinforcing element, in the form of a length of laminated wood 2~ of an I~cross-section which extends over the length of each element. The length of wood 22 provides sufficient rigidity to enable the elements to be easily handled and transported.
The element also contains a fire retardent and may contain colour pigment, depending on the desired colour of the element.
The elements 16 may be of plain rectangular cross-section, shown in Figure 3 of the drawings, but may also be provided with other cross-sections, for example, the element top surface may be provided with a tongue and the bottom surface provided with a corresponding groove such that adjacent elements may interlock to provide a more effecti~e sound isolating interface between adjacent elements and also to add to the structural strength of the wall formed by the elements.
The method o~ producing the sound elements will now be described, with reference to Figure 4 of the drawings.
The elements are formed by first mixing a quantity of rubber crumbs with a prepolymer. The mix 40 is then poured i.nto a metal mould 42 which defines an elongate form identical to the desired form of the element. ~ length of wood 22 is mounted in the mould such 2 ~ ~ ~ 7 ~ ~
that the crumb and prepolymer mix encapsulates the wood.
The prepolymer is then cured, the curing process being controlled by heating the mould 42 using suitable heating means ~4, and applying pressure to the mix by providing the mould 42 with a moveable wall 46, the pressure force being provided by means of a hydraulic actuator 48, to bind the granular material and the wood to form an integral ~lement, which may then ~e removed from the mould.
The components of the mix and the dimensions of ~he element may be varied to provide elements suitable for various purposes. The crumb rubber, as mentioned above, is preferably formed of shredded vehicle tires, the crumbs preferably having a diameter of approximatel~ one quarter of an inch. If the crumbs are substantially similar in diameter, the resulting element will be less dense than an element formed with crumbs of more varied sizes. The density of the element may also be increased by increasing the heat and pressure used during curing of the binder.
The binder is prefer~bly a polyurethane based material, such as FLEXILON 40:2 (Trade-Mark), a solvent free diphenyl meth~ne di-isoyanate polyether prepolymer (MDI) available from Rosehill P~lymers Ltd., of Sowerby Bridge, England. The binder is preferably added to the crumb rubber in ratio of 10% by weight to the total weight of crumb rubber. The fire retardent, and the colour pigment, where present, are also mixed with the binder.
For the preferred element composition a flame retardent chemical such as Fyrol (Trade-Mark) PCF, a tri (B-chloroisopropyl) phosphate 2-chloro-1-propenol, phosphate (3:1), as available from Stauffer Chemical Company of Westport, Connecticut, U.S.A. may be used.
Although the dimensions of elements may vary it is preferable to have the element and reinforcing member 2 ~
dimensions of generally similar proportions. One example of an element is set out below:
Element width (A) = 5 3/4"
Element depth (B) = 10"
Reinforcing member overall depth (C) = 9"
Reinforcing member flange width (D) = 1 3/4~
Reinforcing member flange thickness (E) = 1 1/2"
Reinforcing member web thickness (F) = 3/4~
The resultin~ elements are relatively light, and thus may be transported and installed with minimal need for heavy equipment/ are substantially weatherproof and have good sound reflective and absorbtion properties.
Also, the use of relatively inexpensive materials to form the elements and the savings in transportation and installation when compared to conventional barriers, allows for the provision of barriers in accordance with the present invention at advant:ageous cost. In addition, use of resilient material ~or much of the element allows the element to absorb minor bumps without damage, and if, for example, the bump was from a vehicle, the vehicle would likely sustain only minor damage, if any. In more violent collisions the elements will give-way and the reinforcing mamber break. This would likely result in reduced passenger injury and vehicle damage when compared ~o a collision with, for example, a rigid concrete noise bar~rier.
It will be clear to those skilled in the art that the present invention is not limited to the particular uses described above and further that various modifications and improvements may be made to the invention without departin~ from the scope of the present invention.
Claims (16)
1. A noise abatement element formed AS a granular material and a binder and including a relatively rigid reinforcing member located within the element.
2. The element of claim 1, wherein the granular material is crumb rubber.
3. The element of claim 2, wherein the binding agent is a polymer.
4. The element of claim 3, wherein the reinforcing member is elongate and extends substantially over the length of the element.
5. The element of claim 4, wherein the reinforcing member is in the form of a length of laminated wood.
6. The element of claim 5, wherein the reinforcing member is in the form of an I-beam.
7. The element of claim 6, wherein the granular material is recycled crumb rubber.
8. The element of claim 7, wherein the binding agent is a polyurethane binder.
9. The element of claim 8, wherein the granular material comprises crumbs of about 1/4" average diameter.
10. The element of claim 9, wherein the granular material and the binding agent are present in a ratio of about 10 to 1.
11. The element of claim 10, wherein the binding includes a fire retardant.
12. The element of claim 11, wherein the binding agent includes colour pigment.
13. The element of claim 12, wherein the element has top, bottom and side walls, and said coating covers at least the side walls.
14. A noise abatement barrier comprising:
at least two spaced supporting uprights;
a plurality of elongate noise abating elements extending between the uprights and located one on top of another to form a wall, each element being formed of crumb rubber and a binder and including a relatively rigid reinforcing member located within the element.
at least two spaced supporting uprights;
a plurality of elongate noise abating elements extending between the uprights and located one on top of another to form a wall, each element being formed of crumb rubber and a binder and including a relatively rigid reinforcing member located within the element.
15. A method of producing a noise abatement element comprising:
providing a mix of granular material and a binder;
providing a mould defining an elongate form;
locating a relatively rigid elongate reinforcing member in the mould:
adding said mix to the mould;
curing the binder to solidify the mix in the mould; and removing the solidified mix from the mould.
providing a mix of granular material and a binder;
providing a mould defining an elongate form;
locating a relatively rigid elongate reinforcing member in the mould:
adding said mix to the mould;
curing the binder to solidify the mix in the mould; and removing the solidified mix from the mould.
16. The method of claim 15, wherein the binder is cured under conditions of elevated temperature and pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2015765 CA2015765A1 (en) | 1990-04-30 | 1990-04-30 | Noise abatement element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2015765 CA2015765A1 (en) | 1990-04-30 | 1990-04-30 | Noise abatement element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2015765A1 true CA2015765A1 (en) | 1991-10-31 |
Family
ID=4144876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2015765 Abandoned CA2015765A1 (en) | 1990-04-30 | 1990-04-30 | Noise abatement element |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2015765A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU720965B3 (en) * | 1999-11-26 | 2000-06-15 | Maria Aletta Cziesche | Shaped articles from recycled rubber |
| US6540434B1 (en) | 1997-06-27 | 2003-04-01 | Darren John Hotchkin | Shock absorbing member |
| AU2005203440B2 (en) * | 1997-06-27 | 2008-03-20 | Saferoads Pty Ltd | Shock absorbing member |
| EP2159328A1 (en) * | 2008-08-26 | 2010-03-03 | Sada2 S.R.L. | Shock dampener for road guardrails and process for manufacturing such dampener |
| US20190013002A1 (en) * | 2017-07-06 | 2019-01-10 | Westhill Innovation Inc. | Structural laminate sound barrier |
| US20210131049A1 (en) * | 2019-11-06 | 2021-05-06 | Champagne Edition Inc. | Sound barrier |
-
1990
- 1990-04-30 CA CA 2015765 patent/CA2015765A1/en not_active Abandoned
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6540434B1 (en) | 1997-06-27 | 2003-04-01 | Darren John Hotchkin | Shock absorbing member |
| AU2005203440B2 (en) * | 1997-06-27 | 2008-03-20 | Saferoads Pty Ltd | Shock absorbing member |
| AU720965B3 (en) * | 1999-11-26 | 2000-06-15 | Maria Aletta Cziesche | Shaped articles from recycled rubber |
| EP2159328A1 (en) * | 2008-08-26 | 2010-03-03 | Sada2 S.R.L. | Shock dampener for road guardrails and process for manufacturing such dampener |
| US20190013002A1 (en) * | 2017-07-06 | 2019-01-10 | Westhill Innovation Inc. | Structural laminate sound barrier |
| US20210131049A1 (en) * | 2019-11-06 | 2021-05-06 | Champagne Edition Inc. | Sound barrier |
| US11767648B2 (en) * | 2019-11-06 | 2023-09-26 | Champagne Edition Inc. | Sound barrier |
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