CA2236499A1 - Water-permeable, frost-resistant resurfacing composition - Google Patents
Water-permeable, frost-resistant resurfacing composition Download PDFInfo
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- CA2236499A1 CA2236499A1 CA 2236499 CA2236499A CA2236499A1 CA 2236499 A1 CA2236499 A1 CA 2236499A1 CA 2236499 CA2236499 CA 2236499 CA 2236499 A CA2236499 A CA 2236499A CA 2236499 A1 CA2236499 A1 CA 2236499A1
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- diisocyanate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- 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
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/16—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/50—Flexible or elastic materials
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
A water-permeable, frost-resistant resurfacing composition comprises from 88 to 93 wt% of granules of relatively hard material having a particle size of -12 to +40 mesh and from 7 to 12 wt.% of an elastomeric binder, the granules being bonded together while defining therebetween voids for receiving water. Expansion of the water contained in the voids upon freezing is compensated by a corresponding expansion of the binder, without rupture. The composition of the invention is particularly useful for resurfacing deteriorated concrete, asphalt, brick, flagstone, tile and wood.
Description
WATER-PERMEABLE, FROST-RESISTANT
RESURFACING COMPOSITION
The present invention pertains to improvements in the field of resurfacing deteriorated surfaces. More particularly, the invention relates to a water-permeable, frost-resistant resurfacing compositions.
Chipped, cracked, spalled or stained concrete, asphalt, brick, flagstone, tile and wood present problems.
Not only are they unappealing to the eye, but also cause structural damages if they are left unrepaired. When they are coated with a water-impermeable resurfacing composition, for example a bituminous composition, water remains on the surface and renders it slippery, which may represent a hazard, particularly during winter.
U.S. Patent No. 5,432,213 has proposed a water-permeable resinous composition for road paving, comprising 100 parts by weight of granular aggregate such as crushed stone, 2 to 20 parts by weight of a thermosetting resin as a binder, and 1 to 20 parts by weight of cellulose or 1 to parts by weight of lignocellulose as an additive per 100 parts by weight of the thermosetting resin. Although 25 water penetrates through such a paving composition leaving a non-slip surface, the water trapped inside the composition upon freezing during winter expands and causes the binder to break, resulting in the formation of cracks in the surface.
It is therefore an object of the present invention to overcome the above drawbacks and to provide a water-permeable, frost-resistant resurfacing composition.
According to one aspect of the invention, there is provided a water-permeable, frost-resistant resurfacing composition, comprising from 88 to 93 wt.~ of granules of relatively hard material having a particle size of -12 to +40 mesh and from 7 to 12 wt.~ of an elastomeric binder, the granules being bonded together while defining therebetween voids for receiving water.
Expansion of the water contained in the voids upon freezing is compensated by a corresponding expansion of the binder, without rupture.
The present invention also provides, in another aspect thereof, a substrate having a surface at least partially coated with a water-permeable, frost-resistant composition as defined above. Such a coated substrate can be in the form of a prefabricated tile or panel.
Applicant has found quite unexpectedly that a water-permeable, frost-resistant resurfacing composition can be obtained by mixing 88 to 93 wt.~ of granules of relatively hard material having a particle size of -12 to +40 mesh with 7 to 12 wt.~ of an elastomeric binder. If the amount of binder is less than 7 wt. o, the granules are insufficiently bonded together, causing the formation of cracks in the surface during winter. On the other hand, if the amount of binder is greater than 12 wt.~, the voids defined between the granules become filled with binder, thereby rendering the composition water-impermeable. The particle size of the granules is also critical since, if it is below +40 mesh, the porosity of the composition is insufficient to allow the penetration of water. On the other hand, if the particle size is above -12 mesh, the voids defined between the granules become too large so that the expansion of water contained therein upon freezing cannot be compensated by a corresponding expansion of the binder, resulting in the formation of cracks in the surface during winter.
According to a preferred embodiment, the elastomeric binder is a polyurethane. Preferably, the polyurethane binder comprises a moisture-curable prepolymer obtained from a polyol and a diisocyanate, the prepolymer being in admixture with a predetermined amount of the diisocyanate in free form. For example, use can be made of polypropylene glycol and 4,4'-diphenylmethane diisocyanate. A particularly preferred prepolymer has the general formula:
O=C=N ~ ~ CH_~NH-o-O~CH~CHi-O~-'~- NH . ~ ~ CHI ~ ~ N=C=C
~LJ 0 (I) in which n ranges from 30 to 70. The curing time of such prepolymer when combined with 25 to 40 wt.%, preferably about 35 wt.%, of the diisocyanate in free form and exposure to atmospheric moisture is about 60 minutes. The polyurethane binder obtained from the prepolymer of formula (I) has an elongation at break between 300 and 400 %.
Use can also be made of a two-component polyurethane binder comprising a first component and a second component. The first component comprises a prepolymer obtained from a first polyol and a diisocyanate, the prepolymer being in admixture with a predetermined amount of the diisocyanate in free form, and the second component comprises a second polyol in admixture with a moisture absorbing material. Preferably, the first polyol is a polypropylene glycol having a weight average molecular weight of 45 to 135, the second polyol is a polypropylene glycol having a weight average molecular weight of 500 to 1000 and the diisocyanate is 4,4'-diphenylmethane diisocyanate, the diisocyanate in free form being present in the first component in an amount of 55 to 80 wt.%, preferably 70 wt.%, based on the total weight of the first component. The first and second components are generally present in a weight ratio of 1:1.22. The polyurethane binder obtained by mixing together the first and second components has an elongation at break between 300 and 350.
According to another preferred embodiment, the relatively hard material comprises crushed stone. For example, use can be made of a cornian or ceramic type rock. When using stones of contrasting colors, sizes and textures, distinctive patterns, designs, monograms and logos can be created.
A particularly preferred resurfacing composition according to the invention comprises about 90 wt.$ of the aforesaid granules of relatively hard material and about 10 wt.~ of the elastomeric binder.
The resurfacing composition of the invention can be applied not only onto horizontal surfaces such as asphalt driveways and concrete or wood decks, but also onto vertical surfaces such as retaining walls, columns and stair risers.
When it is desired to resurface asphalt, a primer is preferably applied onto the asphalt surface prior to applying the resurfacing composition of the invention, in order to increase the adherence of the resurfacing composition to the asphalt surface. For example, use can be made of a primer sold by Monsey Bakor Inc., under Product No. 900-34, which is a water-based elastomeric bituminous emulsion.
When resurfacing concrete or wood, a water-impermeable membrane is preferably first applied. Use can be made, for example, of the membrane sold under the trade-mark COLPHENE 1500 by Soprema Inc., which is a self-adhesive membrane composed of bitumen modified with thermoplastic polymers. The upper side of such a membrane is protected by a cross-laminated high density polyethylene film. The adhesive side is protected by a silicone release sheet which is easily removed during application. In the case of concrete, use can also be made of the membrane sold under the trade-mark ELASTOPHENE SP 2.2, sold by Soprema Inc., which is a torch-applied membrane composed of a glass fleece reinforcement, SBS (styrene-butadiene-styrene) modified bitumen and a thermofusible plastic film. The concrete or wood surface is generally coated with a primer to increase the adherence of the membrane to the surface.
When using a COLPHENE 1500 membrane, the surface can be coated with the primer sold under the trademark ELASTOCOL
600 by Soprema Inc., for outdoor applications at ambient temperature above +10°C, or with the primer sold under the trade-mark ELASTOCOL 700 by Soprema Inc., for outdoor applications at lower temperatures, to -10°C. ELASTOCOL
500 is a blend of elastomeric bitumen, volatile solvents, adhesive enhancing additives and resins. ELASTOCOL 700, on the other hand, is a blend of synthetic rubber, volatile solvents and adhesive enhancing additives. For indoor applications, the concrete or wood surface can be coated with the primer sold under the trade-mark ELASTOCOL 350 by Soprema Inc., which is a water-based stabilized bituminous emulsion. When using an ELASTOPHENE
SP 2.2 membrane, the concrete surface can be coated with the primer sold under the trade-mark ELASTOCOL 500 by Soprema Inc., for outdoor applications, or with the aforementioned ELASTOCOL 350 for indoor applications.
ELASTOCOL 500 is a blend of elastomeric bitumen, volatile solvents and adhesive enhancing additives.
Further features and advantages of the invention will become more readily apparent from the following description of preferred embodiments as illustrated by way of example in the accompanying drawings, in which:
RESURFACING COMPOSITION
The present invention pertains to improvements in the field of resurfacing deteriorated surfaces. More particularly, the invention relates to a water-permeable, frost-resistant resurfacing compositions.
Chipped, cracked, spalled or stained concrete, asphalt, brick, flagstone, tile and wood present problems.
Not only are they unappealing to the eye, but also cause structural damages if they are left unrepaired. When they are coated with a water-impermeable resurfacing composition, for example a bituminous composition, water remains on the surface and renders it slippery, which may represent a hazard, particularly during winter.
U.S. Patent No. 5,432,213 has proposed a water-permeable resinous composition for road paving, comprising 100 parts by weight of granular aggregate such as crushed stone, 2 to 20 parts by weight of a thermosetting resin as a binder, and 1 to 20 parts by weight of cellulose or 1 to parts by weight of lignocellulose as an additive per 100 parts by weight of the thermosetting resin. Although 25 water penetrates through such a paving composition leaving a non-slip surface, the water trapped inside the composition upon freezing during winter expands and causes the binder to break, resulting in the formation of cracks in the surface.
It is therefore an object of the present invention to overcome the above drawbacks and to provide a water-permeable, frost-resistant resurfacing composition.
According to one aspect of the invention, there is provided a water-permeable, frost-resistant resurfacing composition, comprising from 88 to 93 wt.~ of granules of relatively hard material having a particle size of -12 to +40 mesh and from 7 to 12 wt.~ of an elastomeric binder, the granules being bonded together while defining therebetween voids for receiving water.
Expansion of the water contained in the voids upon freezing is compensated by a corresponding expansion of the binder, without rupture.
The present invention also provides, in another aspect thereof, a substrate having a surface at least partially coated with a water-permeable, frost-resistant composition as defined above. Such a coated substrate can be in the form of a prefabricated tile or panel.
Applicant has found quite unexpectedly that a water-permeable, frost-resistant resurfacing composition can be obtained by mixing 88 to 93 wt.~ of granules of relatively hard material having a particle size of -12 to +40 mesh with 7 to 12 wt.~ of an elastomeric binder. If the amount of binder is less than 7 wt. o, the granules are insufficiently bonded together, causing the formation of cracks in the surface during winter. On the other hand, if the amount of binder is greater than 12 wt.~, the voids defined between the granules become filled with binder, thereby rendering the composition water-impermeable. The particle size of the granules is also critical since, if it is below +40 mesh, the porosity of the composition is insufficient to allow the penetration of water. On the other hand, if the particle size is above -12 mesh, the voids defined between the granules become too large so that the expansion of water contained therein upon freezing cannot be compensated by a corresponding expansion of the binder, resulting in the formation of cracks in the surface during winter.
According to a preferred embodiment, the elastomeric binder is a polyurethane. Preferably, the polyurethane binder comprises a moisture-curable prepolymer obtained from a polyol and a diisocyanate, the prepolymer being in admixture with a predetermined amount of the diisocyanate in free form. For example, use can be made of polypropylene glycol and 4,4'-diphenylmethane diisocyanate. A particularly preferred prepolymer has the general formula:
O=C=N ~ ~ CH_~NH-o-O~CH~CHi-O~-'~- NH . ~ ~ CHI ~ ~ N=C=C
~LJ 0 (I) in which n ranges from 30 to 70. The curing time of such prepolymer when combined with 25 to 40 wt.%, preferably about 35 wt.%, of the diisocyanate in free form and exposure to atmospheric moisture is about 60 minutes. The polyurethane binder obtained from the prepolymer of formula (I) has an elongation at break between 300 and 400 %.
Use can also be made of a two-component polyurethane binder comprising a first component and a second component. The first component comprises a prepolymer obtained from a first polyol and a diisocyanate, the prepolymer being in admixture with a predetermined amount of the diisocyanate in free form, and the second component comprises a second polyol in admixture with a moisture absorbing material. Preferably, the first polyol is a polypropylene glycol having a weight average molecular weight of 45 to 135, the second polyol is a polypropylene glycol having a weight average molecular weight of 500 to 1000 and the diisocyanate is 4,4'-diphenylmethane diisocyanate, the diisocyanate in free form being present in the first component in an amount of 55 to 80 wt.%, preferably 70 wt.%, based on the total weight of the first component. The first and second components are generally present in a weight ratio of 1:1.22. The polyurethane binder obtained by mixing together the first and second components has an elongation at break between 300 and 350.
According to another preferred embodiment, the relatively hard material comprises crushed stone. For example, use can be made of a cornian or ceramic type rock. When using stones of contrasting colors, sizes and textures, distinctive patterns, designs, monograms and logos can be created.
A particularly preferred resurfacing composition according to the invention comprises about 90 wt.$ of the aforesaid granules of relatively hard material and about 10 wt.~ of the elastomeric binder.
The resurfacing composition of the invention can be applied not only onto horizontal surfaces such as asphalt driveways and concrete or wood decks, but also onto vertical surfaces such as retaining walls, columns and stair risers.
When it is desired to resurface asphalt, a primer is preferably applied onto the asphalt surface prior to applying the resurfacing composition of the invention, in order to increase the adherence of the resurfacing composition to the asphalt surface. For example, use can be made of a primer sold by Monsey Bakor Inc., under Product No. 900-34, which is a water-based elastomeric bituminous emulsion.
When resurfacing concrete or wood, a water-impermeable membrane is preferably first applied. Use can be made, for example, of the membrane sold under the trade-mark COLPHENE 1500 by Soprema Inc., which is a self-adhesive membrane composed of bitumen modified with thermoplastic polymers. The upper side of such a membrane is protected by a cross-laminated high density polyethylene film. The adhesive side is protected by a silicone release sheet which is easily removed during application. In the case of concrete, use can also be made of the membrane sold under the trade-mark ELASTOPHENE SP 2.2, sold by Soprema Inc., which is a torch-applied membrane composed of a glass fleece reinforcement, SBS (styrene-butadiene-styrene) modified bitumen and a thermofusible plastic film. The concrete or wood surface is generally coated with a primer to increase the adherence of the membrane to the surface.
When using a COLPHENE 1500 membrane, the surface can be coated with the primer sold under the trademark ELASTOCOL
600 by Soprema Inc., for outdoor applications at ambient temperature above +10°C, or with the primer sold under the trade-mark ELASTOCOL 700 by Soprema Inc., for outdoor applications at lower temperatures, to -10°C. ELASTOCOL
500 is a blend of elastomeric bitumen, volatile solvents, adhesive enhancing additives and resins. ELASTOCOL 700, on the other hand, is a blend of synthetic rubber, volatile solvents and adhesive enhancing additives. For indoor applications, the concrete or wood surface can be coated with the primer sold under the trade-mark ELASTOCOL 350 by Soprema Inc., which is a water-based stabilized bituminous emulsion. When using an ELASTOPHENE
SP 2.2 membrane, the concrete surface can be coated with the primer sold under the trade-mark ELASTOCOL 500 by Soprema Inc., for outdoor applications, or with the aforementioned ELASTOCOL 350 for indoor applications.
ELASTOCOL 500 is a blend of elastomeric bitumen, volatile solvents and adhesive enhancing additives.
Further features and advantages of the invention will become more readily apparent from the following description of preferred embodiments as illustrated by way of example in the accompanying drawings, in which:
Fig. 1 is a fragmented top plan view illustrating an asphalt surface partially coated with a resurfacing composition according to a preferred embodiment of the invention;
Fig. 2 is a top plan view of a prefabricated tile according to another preferred embodiment of the invention; and Fig. 3 is a sectional view taken along line 3-3 of Fig. 2.
Fig. 1 illustrates an asphalt surface 10 partially coated with a layer 12 of a water-permeable, frost-resistant resurfacing composition comprising granules of crushed stone having a particle size of -12 to +40 mesh, in admixture with an elastomeric binder. The thickness of the layer 12 is generally about 5 mm, but can vary up to about 15 mm.
The prefabricated tile illustrated in Figs. 2 and 3, and generally designated by reference numeral 14, comprises a layer 16 of a water-permeable, frost-resistant composition similar to the resurfacing composition shown in Fig. l, which has been molded on top of a self-adhesive membrane 18 of the type sold under the trade-mark COLPHENE 1500 by Soprema Inc. The adhesive side of the membrane 18 is covered with a silicone release sheet 20 which is removed during application. The thickness of the layer 16 is generally about 5 mm, but can vary up to about 15 mm.
The following non-limiting examples further illustrate the invention.
Fig. 2 is a top plan view of a prefabricated tile according to another preferred embodiment of the invention; and Fig. 3 is a sectional view taken along line 3-3 of Fig. 2.
Fig. 1 illustrates an asphalt surface 10 partially coated with a layer 12 of a water-permeable, frost-resistant resurfacing composition comprising granules of crushed stone having a particle size of -12 to +40 mesh, in admixture with an elastomeric binder. The thickness of the layer 12 is generally about 5 mm, but can vary up to about 15 mm.
The prefabricated tile illustrated in Figs. 2 and 3, and generally designated by reference numeral 14, comprises a layer 16 of a water-permeable, frost-resistant composition similar to the resurfacing composition shown in Fig. l, which has been molded on top of a self-adhesive membrane 18 of the type sold under the trade-mark COLPHENE 1500 by Soprema Inc. The adhesive side of the membrane 18 is covered with a silicone release sheet 20 which is removed during application. The thickness of the layer 16 is generally about 5 mm, but can vary up to about 15 mm.
The following non-limiting examples further illustrate the invention.
Tn'Y11MDT.Ti 1 527.7 grams (93 wt. o) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 39.7 grams (7 wt.~) of a polyurethane binder sold under .the trade-mark ELASTOPUR P-237 by Premilec Inc., which comprises 65 wt.~
of a prepolymer of formula (I) defined herein and 35 wt.o of 4,4'-diphenylmethane diisocyanate in free form. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 3 mm.
Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
1.047 kilograms (92 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 30.8 grams (8 wt. o) of the polyurethane binder sold under the trade-mark ELASTOPUR P-237. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 6 mm. Uniformity was obtained by helating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
_ 7 _ ~'Y11MDT~' '~
2.4 kilograms (90 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 227 .grams (10 wt.~) of the polyurethane binder sold under the trade-mark ELASTOPUR P-237. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 12.5 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
L'Y11MDT L' /I
4.0 kilograms (88 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 544.8 grams (12 wt. o) of the polyurethane binder sold under the trade-mark ELASTOPUR P-237. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 25 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
_ g _ T: YZ1MDT.&' ~, 527.7 grams (93 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 39.7, grams (7 wt.~) of a two-component polyurethane binder comprising 17.86 grams (45 wt.~) of a first component sold under the trade-mark ELASTOPUR P-200 by Premilec Inc. and 21.84 grams (55 wt.~) of a second component sold under the trade-mark ELASTOPUR R-210 by the same company. ELASTOPUR
P-200 comprises 30 wt.$ of a prepolymer obtained from polypropylene glycol having a weight average molecular weight of 45 to 135 and 4,4'-diphenylmethane diisocyanate, and 70 wt.~ of 4,4'-diphenylmethane diisocyanate in free form. ELASTOPUR R-210 comprises 90 wt.$ of polypropylene glycol having a weight average molecular weight of 500 to 1000, 5 wt.~ of 3 ~ molecular sieve (moisture absorbent) and 5 wt.~ of castor oil.
Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder.
The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 3 mm.
Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
1.4 kilograms (92 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 90.8 grams (8 wt.~) of a two-component polyurethane binder comprising 40.86 grams (45 wt. o) of the aforesaid first component sold under the trade-mark ELASTOPUR P-200 and 49.94 grams (55 wt. o) of the aforesaid second component sold under the trade-mark ELASTOPUR R-210. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 3 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
L'VTTdDT L' '7 2.04 kilograms (90 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 227 grams (10 wt.~) of a two-component polyurethane binder comprising 102.15 grams (45 wt.~) of the aforesaid first component sold under the trade-mark ELASTOPUR P-200 and 124.85 grams (55 wt.~) of the aforesaid second component sold under the trade-mark ELASTOPUR R-210. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 12.5 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
4.0 kilograms (88 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 544.8 grams (12 wt.$) of a two-component polyurethane binder comprising 245.16 grams (45 wt.%) of the aforesaid first component sold under the trade-mark ELASTOPUR P-200 and 229.64 grams (55 wt.%) of the aforesaid second component sold under the trade-mark ELASTOPUR R-210. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 25 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
of a prepolymer of formula (I) defined herein and 35 wt.o of 4,4'-diphenylmethane diisocyanate in free form. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 3 mm.
Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
1.047 kilograms (92 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 30.8 grams (8 wt. o) of the polyurethane binder sold under the trade-mark ELASTOPUR P-237. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 6 mm. Uniformity was obtained by helating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
_ 7 _ ~'Y11MDT~' '~
2.4 kilograms (90 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 227 .grams (10 wt.~) of the polyurethane binder sold under the trade-mark ELASTOPUR P-237. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 12.5 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
L'Y11MDT L' /I
4.0 kilograms (88 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 544.8 grams (12 wt. o) of the polyurethane binder sold under the trade-mark ELASTOPUR P-237. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 25 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 60 minutes is permitted before curing begins.
_ g _ T: YZ1MDT.&' ~, 527.7 grams (93 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 39.7, grams (7 wt.~) of a two-component polyurethane binder comprising 17.86 grams (45 wt.~) of a first component sold under the trade-mark ELASTOPUR P-200 by Premilec Inc. and 21.84 grams (55 wt.~) of a second component sold under the trade-mark ELASTOPUR R-210 by the same company. ELASTOPUR
P-200 comprises 30 wt.$ of a prepolymer obtained from polypropylene glycol having a weight average molecular weight of 45 to 135 and 4,4'-diphenylmethane diisocyanate, and 70 wt.~ of 4,4'-diphenylmethane diisocyanate in free form. ELASTOPUR R-210 comprises 90 wt.$ of polypropylene glycol having a weight average molecular weight of 500 to 1000, 5 wt.~ of 3 ~ molecular sieve (moisture absorbent) and 5 wt.~ of castor oil.
Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder.
The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 3 mm.
Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
1.4 kilograms (92 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 90.8 grams (8 wt.~) of a two-component polyurethane binder comprising 40.86 grams (45 wt. o) of the aforesaid first component sold under the trade-mark ELASTOPUR P-200 and 49.94 grams (55 wt. o) of the aforesaid second component sold under the trade-mark ELASTOPUR R-210. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 3 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
L'VTTdDT L' '7 2.04 kilograms (90 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 227 grams (10 wt.~) of a two-component polyurethane binder comprising 102.15 grams (45 wt.~) of the aforesaid first component sold under the trade-mark ELASTOPUR P-200 and 124.85 grams (55 wt.~) of the aforesaid second component sold under the trade-mark ELASTOPUR R-210. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 12.5 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
4.0 kilograms (88 wt.~) of granules of crushed pigmented stone having a particle size of -12 to +40 mesh were mixed in a concrete mixer with 544.8 grams (12 wt.$) of a two-component polyurethane binder comprising 245.16 grams (45 wt.%) of the aforesaid first component sold under the trade-mark ELASTOPUR P-200 and 229.64 grams (55 wt.%) of the aforesaid second component sold under the trade-mark ELASTOPUR R-210. Mixing was carried out for a period of about 5 minutes, until the granules were uniformly coated with the binder. The composition was poured on a substrate having an area of 0.093 m2 and was spread over the surface with a trowel to provide a uniform layer having a thickness of 25 mm. Uniformity was obtained by heating the trowel at a maximum temperature of 70°C, solvent being sprayed onto the trowel to provide a uniform finish. A limited period of 30 minutes is permitted before curing begins.
Claims (15)
1. A water-permeable, frost-resistant resurfacing composition, comprising from 88 to 93 wt.% of granules of relatively hard material having a particle size of -12 to +40 mesh and from 7 to 12 wt.% of an elastomeric binder, said granules being bonded together while defining therebetween voids for receiving water, whereby expansion of the water contained in said voids upon freezing is compensated by a corresponding expansion of said binder, without rupture.
2. A resurfacing composition as claimed in claim 1, wherein said binder is a polyurethane.
3. A resurfacing composition as claimed in claim 2, wherein said polyurethane binder comprises a moisture-curable prepolymer obtained from a polyol and a diisocyanate, said prepolymer being in admixture with a predetermined amount of said diisocyanate in free form.
4. A resurfacing composition as claimed in claim 3, wherein said polyol is polypropylene glycol and said diisocyanate is 4,4'-diphenylmethane diisocyanate.
5. A resurfacing composition as claimed in claim 4, wherein said prepolymer has the general formula:
in which n ranges from 30 to 70, and wherein said diisocyanate in free form is present in an amount of 25 to 40 wt.%, based on the total weight of the mixture of prepolymer and diisocyanate.
in which n ranges from 30 to 70, and wherein said diisocyanate in free form is present in an amount of 25 to 40 wt.%, based on the total weight of the mixture of prepolymer and diisocyanate.
6. A resurfacing composition as claimed in claim 5, wherein the amount of diisocyanate in free form is 35 wt.%.
7. A resurfacing composition as claimed in claim 5, wherein said polyurethane binder has an elongation at break between 300 and 400 %.
8. A resurfacing composition as claimed in claim 2, wherein said polyurethane binder is a two-component binder comprising a first component and a second component, said first component comprising a prepolymer obtained from a first polyol and a diisocyanate, said prepolymer being in admixture with a predetermined amount of said diisocyanate in free form, and said second component comprising a second polyol in admixture with a moisture absorbing material.
9. A resurfacing composition as claimed in claim 8, wherein said first polyol is polypropylene glycol having a weight average molecular weight of 45 to 135, said second polyol is polypropylene glycol having a weight average molecular weight of 500 to 1000 and said diisocyanate is 4,4'-diphenylmethane diisocyanate, and wherein said diisocyanate in free form is present in said first component in an amount of 55 to 80 wt.%, based on the total weight of said first component.
10. A resurfacing composition as claimed in claim 9, wherein the amount of said diisocyanate in free form is 70 wt.%.
11. A resurfacing composition as claimed in claim 9, wherein said first and second components are present in a weight ratio of 1:1.22.
12. A resurfacing composition as claimed in claim 11, wherein said polyurethane binder has an elongation at break between 300 and 350.
13. A resurfacing composition as claimed in claim 1, wherein said relatively hard material comprises crushed stone.
14. A resurfacing composition as claimed in claim 1, wherein said granules of relatively hard material are present in an amount of 90 wt.% and said binder is present in an amount of 10 wt.%, based on the total weight of the composition.
15. A substrate having a surface at least partially coated with a water-permeable, frost-resistant composition comprising from 88 to 93 wt.% of granules of relatively hard material having a particle size of -12 to +40 mesh and from 7 to 12 wt.% of an elastomeric binder, said granules being bonded together while defining therebetween voids for receiving water, whereby expansion of the water contained in said voids upon freezing is compensated by a corresponding expansion of said binder, without rupture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2236499 CA2236499A1 (en) | 1998-05-01 | 1998-05-01 | Water-permeable, frost-resistant resurfacing composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2236499 CA2236499A1 (en) | 1998-05-01 | 1998-05-01 | Water-permeable, frost-resistant resurfacing composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2236499A1 true CA2236499A1 (en) | 1999-11-01 |
Family
ID=29275637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2236499 Abandoned CA2236499A1 (en) | 1998-05-01 | 1998-05-01 | Water-permeable, frost-resistant resurfacing composition |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2236499A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG108832A1 (en) * | 2001-01-24 | 2005-02-28 | Nippon Paint Co Ltd | Method of fabricating a membranous substance and method of fabricating a multilayer membranous substance |
| EP1753815A1 (en) * | 2004-05-28 | 2007-02-21 | John Arthur Cummins | Fluid permeable composite material and process for same |
| EP2599762A1 (en) | 2011-11-30 | 2013-06-05 | Basf Se | Repair method for road pavings, in particular for open-pore asphalts |
| US9221996B2 (en) | 2011-11-30 | 2015-12-29 | Basf Se | Process for repairing road surfacing systems, in particular for open-pore asphalts |
| CN109761538A (en) * | 2019-01-30 | 2019-05-17 | 浙江广天构件股份有限公司 | A kind of dew aggregate concrete and its construction method |
-
1998
- 1998-05-01 CA CA 2236499 patent/CA2236499A1/en not_active Abandoned
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG108832A1 (en) * | 2001-01-24 | 2005-02-28 | Nippon Paint Co Ltd | Method of fabricating a membranous substance and method of fabricating a multilayer membranous substance |
| EP1753815A1 (en) * | 2004-05-28 | 2007-02-21 | John Arthur Cummins | Fluid permeable composite material and process for same |
| EP1753815A4 (en) * | 2004-05-28 | 2007-06-27 | John Arthur Cummins | Fluid permeable composite material and process for same |
| US7879921B2 (en) | 2004-05-28 | 2011-02-01 | John Arthur Cummins | Fluid permeable composite material and process for same |
| EP2599762A1 (en) | 2011-11-30 | 2013-06-05 | Basf Se | Repair method for road pavings, in particular for open-pore asphalts |
| WO2013079403A1 (en) | 2011-11-30 | 2013-06-06 | Basf Se | Repair method for road surfacings, in particular for open-pored asphalts |
| US9221996B2 (en) | 2011-11-30 | 2015-12-29 | Basf Se | Process for repairing road surfacing systems, in particular for open-pore asphalts |
| AU2012344079B2 (en) * | 2011-11-30 | 2016-04-21 | Basf Se | Repair method for road surfacings, in particular for open-pored asphalts |
| CN109761538A (en) * | 2019-01-30 | 2019-05-17 | 浙江广天构件股份有限公司 | A kind of dew aggregate concrete and its construction method |
| CN109761538B (en) * | 2019-01-30 | 2021-08-17 | 浙江广天构件股份有限公司 | Exposed aggregate concrete and construction method thereof |
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