CA1275775C - Concrete repair kit - Google Patents
Concrete repair kitInfo
- Publication number
- CA1275775C CA1275775C CA000520942A CA520942A CA1275775C CA 1275775 C CA1275775 C CA 1275775C CA 000520942 A CA000520942 A CA 000520942A CA 520942 A CA520942 A CA 520942A CA 1275775 C CA1275775 C CA 1275775C
- Authority
- CA
- Canada
- Prior art keywords
- bonding agent
- approximately
- weight
- mixture
- agent
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
- B29C73/02—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using liquid or paste-like material
-
- 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
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/06—Concrete
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Civil Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
ABSTRACT
A kit for repairing spauled or broken concrete containing a premixed bonding agent and a patching compound used in conjunction with the bonding agent, whereby the bonding interface formed between the bonding agent and the patching compound is generally uniform and resilient, responding to the extremes in weather conditions and the resulting expansion and contraction of the substrate concrete body being repaired.
A kit for repairing spauled or broken concrete containing a premixed bonding agent and a patching compound used in conjunction with the bonding agent, whereby the bonding interface formed between the bonding agent and the patching compound is generally uniform and resilient, responding to the extremes in weather conditions and the resulting expansion and contraction of the substrate concrete body being repaired.
Description
~275775 This invention relates to a novel kit of components for providing a resilient patch in the repair of spauled or broken concrete.
BACKGROUND OF INVENTION
It is a common problem in the repair of broken concrete that it is difficult to provide a patch that will permanently adhere to the main body of concrete to be repaired. Concrete normally expands and contracts in response to changes in the ambient temperature. While this expansion and contraction can be a cause of damage to concrete (especially in cold climate), such as cracking or spauling of the surface, it contributes as well to the degradation of repairs.
The most common type of concrete repair comprises the addition 13 of a lap coat of a mixture Gf concrete similar in composition to that of the concrete body being repaired. Such a lap coat provides a poor bond however. It will be appreciated by those skilled in the art that normally a poor bond is created at the interface of like materials and that a more effective bond is provided where a layer of glue is applied to each body to be joined and the interface between the two bodies comprises an adhesive bridge Eormed when the two layers of glue are ~oined together.
In the art of concrete patching it has therefoxe been taught to apply an adhesive bridge to the body of concrete to be repaired formed from an epoxy resin or the like and to thereafter apply a patching compouncl such as concrete.
Normally an adhesive bridge formed from epoxy resin or the like when first applied has a low viscosity and when completely dry is rigid and brittle. Although such an .,~ ,. ..
~Z7~;7~S
1 adhesive bridge provides a more effective bond with the patching material, when the concrete body expands and contracts in response to changes in the ambient temperature, the adhesive bridge will crack due to its brittle nature.
It will be appreciated by those skilled in the art that when the adhesive bridge cracks the bond formed thereby between the concrete body and the patching material is disrupted. The repaired surface will then be affected by spauling and cracking and the problem will have returned.
An example of an adhesive bridge being provided as a bonding interface between a concrete body and a patching compound may be seen in Japanese Letters Patent 60,195,269 to Tao Gosei Chem Ind Ltd. -- a coating material having a viscosity of 300 C.P.S. or more is applied to the damaged portion, for example cracks, blisters, peeling, of reinforced concrete structures. This undercoating of epo~y resin is applied to the damaged portion prior to application of the patching material.
In United Kingdom Letters Patent 2,030,986 B it is disclosed at page 2 line 15 that it is usual to provide the concrete surface with a so called "adhesive bridge".
The invention therein discloses that it is unnecessary to provide an adhesive bridge when the binder mixture of the invention is applied directly to the damaged concrete.
United States Letters Patent 3,966,657 describes a filling compound to be applied to concrete surfaces -- according to the invention therein the extension of the curing time of the compound in response to decreases in the ambient temperature may be compensated for by selecting and adding a diluent to the resin or hardener blend so that when the .
BACKGROUND OF INVENTION
It is a common problem in the repair of broken concrete that it is difficult to provide a patch that will permanently adhere to the main body of concrete to be repaired. Concrete normally expands and contracts in response to changes in the ambient temperature. While this expansion and contraction can be a cause of damage to concrete (especially in cold climate), such as cracking or spauling of the surface, it contributes as well to the degradation of repairs.
The most common type of concrete repair comprises the addition 13 of a lap coat of a mixture Gf concrete similar in composition to that of the concrete body being repaired. Such a lap coat provides a poor bond however. It will be appreciated by those skilled in the art that normally a poor bond is created at the interface of like materials and that a more effective bond is provided where a layer of glue is applied to each body to be joined and the interface between the two bodies comprises an adhesive bridge Eormed when the two layers of glue are ~oined together.
In the art of concrete patching it has therefoxe been taught to apply an adhesive bridge to the body of concrete to be repaired formed from an epoxy resin or the like and to thereafter apply a patching compouncl such as concrete.
Normally an adhesive bridge formed from epoxy resin or the like when first applied has a low viscosity and when completely dry is rigid and brittle. Although such an .,~ ,. ..
~Z7~;7~S
1 adhesive bridge provides a more effective bond with the patching material, when the concrete body expands and contracts in response to changes in the ambient temperature, the adhesive bridge will crack due to its brittle nature.
It will be appreciated by those skilled in the art that when the adhesive bridge cracks the bond formed thereby between the concrete body and the patching material is disrupted. The repaired surface will then be affected by spauling and cracking and the problem will have returned.
An example of an adhesive bridge being provided as a bonding interface between a concrete body and a patching compound may be seen in Japanese Letters Patent 60,195,269 to Tao Gosei Chem Ind Ltd. -- a coating material having a viscosity of 300 C.P.S. or more is applied to the damaged portion, for example cracks, blisters, peeling, of reinforced concrete structures. This undercoating of epo~y resin is applied to the damaged portion prior to application of the patching material.
In United Kingdom Letters Patent 2,030,986 B it is disclosed at page 2 line 15 that it is usual to provide the concrete surface with a so called "adhesive bridge".
The invention therein discloses that it is unnecessary to provide an adhesive bridge when the binder mixture of the invention is applied directly to the damaged concrete.
United States Letters Patent 3,966,657 describes a filling compound to be applied to concrete surfaces -- according to the invention therein the extension of the curing time of the compound in response to decreases in the ambient temperature may be compensated for by selecting and adding a diluent to the resin or hardener blend so that when the .
~75~7~
1 resin blend and the hardener blend are intermixed a heat exchange is produced which counteracts the effect of the ambient temperature.
It is therefore an object of this invention to provide a kit of pre-mixed components comprising a bonding agent and a patching compound which when applied to a concrete body provides a resilient patch which will not break down in response to the expansion and contraction of the concrete body according to changes in the ambient temperature.
It is a further object of this invention to provide a kit of components for patching a broken concrete body, the kit having a bonding agent and a patching mixture which may be more effectively applied to the concrete body in a bonding interface.
Further and other objects of the invention will be apparent to those skilled in the art from the following Summary of Invention and Detailed Description thereof.
SUMMARY OF INVENTION
According to one aspect of the invention there is provided a kit for repairing spauled or broken concrete comprising:
a) a pre-mixed bonding agent for ul-iformly coating the concrete surface to be repaired; said bonding agent comprising more than one premixture containing an expoxy resin and hardening agent separately contained until mixed together prior to use; said epoxy resin also blended with, a diluent, a filler, a binder, and a thickening agent;
said hardening agent also blended with a diluent, a first accelerator, a second accelerator, a binder and a thickening .~gent; whereby when the epoxy resin mixture and the hardening ~27577~
1 mixture are mixed a bonding agent is formed having a viscosity characterized by good adhesion when first applied to a concrete surface and when said bonding agent drles having resilient characteristics;
b) a patching compound used in conjunction with said bonding agent comprising at least two premixtures containing an epoxy resin and a hardening agent separately contained until mixed together prior to use; said epoxy resin also blended with aggregate material, and preferably pigments;
said hardening agent preferably alone but may also be blended with aggregates and pigments whereby when the epoxy resin mixture and the hardening agent mixture are mixed a patching compound is formed having viscosity characteri2ed by good adhesion when first applied to said bonding agent and when said patching compound dries having resilient characteristics;
c) whereby the bonding interface formed between said bonding agent and said patching compound is characterized by a generally uniform interface, and whi.ch interface is resilient, responding to freeze/thaw cycles resulting in the expansion and contraction of the substrate concrete body being repaired, thereby increasing the life of the patch applied.
BRIEF DESCRIPTION OF DRAWINGS
Figure l is a schematic view of a concrete body having a damaged area.
Fi~ure 2 is a schematic vi.ew of the damaged area in Figure l having a bonding agent applied thereto.
Fiqure 3 is a schematic view of the damaged area in Figure l having an adhesive bridge applied thereto as taught `:~
~27S77~
1 by the prior art.
Figure 4 is a schematic view of the damaged area shown in Figure l having applied thereto the bonding agent shown in Figure 2 and a patching compound.
~ ith reference to Figure l there is shown a concrete body 10 having a damaged area 15, as for example by spauling or cracking of the surface 12 of the concrete body 10.
Normally the surface 16 of the damaged area 15 is cleaned prior to any patching -- for example a wire brush or the like may be used to debrade loose material. Nonetheless the surface 16 will have irregular undulations comprising pockets 20, 30, 40, and 50 and projections as at 35. With reference to Figure 3 there is shown the damaged area 15 having applied thereto an adhesive bridge L composed only of the combination of epoxy and hardener as normally applied by men skilled in the art. As a result of the exothermic reaction of the epoxy and the hardener when first combined, the viscosity of the said combination when applied to the surface 12 decreases to a value less than that of the epoxy resin without the hardener. The low viscosity oE the adhesive bridge L when first applied to the sur~ace 12 of the damaged area 15 results in weeping of the material L. Portions of the damaged area 15 which are generally vertically inclined may not be coated as at projection 45. As best illustrated ln Figure 3, the adhesive bridge L is not of a unifrom thickness or consistency -- air bubbles may be trapped within recesses 50, 40 and projections 35 may not be coated;
thereby reducing the quality of the bonding interface with any patching coat applied to the adhesive bridge L.
~ , ~27~7~i 1 With reference to Figure 2 there is shown a layer of a bonding agent M as taught herein applied to the surface 12 of the damaged area. The said layer M has a generally uniform thickness, for example as at projection 45. As a result of the uniform thickness of the layer of the bonding agent M, the quantity of trapped air (as illustrated by recesses 50, 40) is reduced and projections ~as for example at 45) are more uniformly coated. The quality of the bonding interface with any patching coat applied to the bonding agent M is thereby improved. In this regard, reference is made to Figure 4-- wherein there is shown a patching coat P applied to the surface presented by the layer of the bonding agent M.
In Figure 4 patching compound P is shown applied to the bonding agent M as referred to in Figure 2.
Exaggerated zones A and B are illustrated to depict the total encapsulation with epoxy ladened material of each granule within the patching compound, even at the boundary of the bonding agent layer, unlike that of the generally taught adhesive bridge (as illustrated in Figure 3) wherein particles of a similar patch would come into direct contact with cracks and crevices of the damaged surface 15.
Preferably the I.ayer of bond:i.ng ayent M. is characterized by the following constituents:
TABI.E 1 - BONDING AGENT
EPOXY COMPONENTS
TRADE
ITEM DEscRIPTION % BY WEIGHT GENERIC DESCRIPTION
1 "DER 331" 24.4 Liquid Epoxy Resin :
~2~7~7S
1 Trade ItemDescription % By WeightGeneric ~escription Der is a registered trade mark of the DOW
Chemical Company of Midland Michigan 2"TOLUOL" 6.5 Diluent 3"ATOMITE" 17.8Calcium Carbonate (a registered trade mark (Fine Ground Calcium of Thompson Weinman and Carbonate) Company) 4"MULTIFLEX MM" 3.0Precipitated Calcium Carbonate Multiflex MM is a registered trade mark of the Diamond Shamrock Corporation of Cleveland, Ohio 5"CALEDRIA" 1.2 Thickening Agent HARDENER COMPONENTS
Trade I-temDescription % ~y ~eigh~~Ll~ C~LLe~LQ~
1 resin blend and the hardener blend are intermixed a heat exchange is produced which counteracts the effect of the ambient temperature.
It is therefore an object of this invention to provide a kit of pre-mixed components comprising a bonding agent and a patching compound which when applied to a concrete body provides a resilient patch which will not break down in response to the expansion and contraction of the concrete body according to changes in the ambient temperature.
It is a further object of this invention to provide a kit of components for patching a broken concrete body, the kit having a bonding agent and a patching mixture which may be more effectively applied to the concrete body in a bonding interface.
Further and other objects of the invention will be apparent to those skilled in the art from the following Summary of Invention and Detailed Description thereof.
SUMMARY OF INVENTION
According to one aspect of the invention there is provided a kit for repairing spauled or broken concrete comprising:
a) a pre-mixed bonding agent for ul-iformly coating the concrete surface to be repaired; said bonding agent comprising more than one premixture containing an expoxy resin and hardening agent separately contained until mixed together prior to use; said epoxy resin also blended with, a diluent, a filler, a binder, and a thickening agent;
said hardening agent also blended with a diluent, a first accelerator, a second accelerator, a binder and a thickening .~gent; whereby when the epoxy resin mixture and the hardening ~27577~
1 mixture are mixed a bonding agent is formed having a viscosity characterized by good adhesion when first applied to a concrete surface and when said bonding agent drles having resilient characteristics;
b) a patching compound used in conjunction with said bonding agent comprising at least two premixtures containing an epoxy resin and a hardening agent separately contained until mixed together prior to use; said epoxy resin also blended with aggregate material, and preferably pigments;
said hardening agent preferably alone but may also be blended with aggregates and pigments whereby when the epoxy resin mixture and the hardening agent mixture are mixed a patching compound is formed having viscosity characteri2ed by good adhesion when first applied to said bonding agent and when said patching compound dries having resilient characteristics;
c) whereby the bonding interface formed between said bonding agent and said patching compound is characterized by a generally uniform interface, and whi.ch interface is resilient, responding to freeze/thaw cycles resulting in the expansion and contraction of the substrate concrete body being repaired, thereby increasing the life of the patch applied.
BRIEF DESCRIPTION OF DRAWINGS
Figure l is a schematic view of a concrete body having a damaged area.
Fi~ure 2 is a schematic vi.ew of the damaged area in Figure l having a bonding agent applied thereto.
Fiqure 3 is a schematic view of the damaged area in Figure l having an adhesive bridge applied thereto as taught `:~
~27S77~
1 by the prior art.
Figure 4 is a schematic view of the damaged area shown in Figure l having applied thereto the bonding agent shown in Figure 2 and a patching compound.
~ ith reference to Figure l there is shown a concrete body 10 having a damaged area 15, as for example by spauling or cracking of the surface 12 of the concrete body 10.
Normally the surface 16 of the damaged area 15 is cleaned prior to any patching -- for example a wire brush or the like may be used to debrade loose material. Nonetheless the surface 16 will have irregular undulations comprising pockets 20, 30, 40, and 50 and projections as at 35. With reference to Figure 3 there is shown the damaged area 15 having applied thereto an adhesive bridge L composed only of the combination of epoxy and hardener as normally applied by men skilled in the art. As a result of the exothermic reaction of the epoxy and the hardener when first combined, the viscosity of the said combination when applied to the surface 12 decreases to a value less than that of the epoxy resin without the hardener. The low viscosity oE the adhesive bridge L when first applied to the sur~ace 12 of the damaged area 15 results in weeping of the material L. Portions of the damaged area 15 which are generally vertically inclined may not be coated as at projection 45. As best illustrated ln Figure 3, the adhesive bridge L is not of a unifrom thickness or consistency -- air bubbles may be trapped within recesses 50, 40 and projections 35 may not be coated;
thereby reducing the quality of the bonding interface with any patching coat applied to the adhesive bridge L.
~ , ~27~7~i 1 With reference to Figure 2 there is shown a layer of a bonding agent M as taught herein applied to the surface 12 of the damaged area. The said layer M has a generally uniform thickness, for example as at projection 45. As a result of the uniform thickness of the layer of the bonding agent M, the quantity of trapped air (as illustrated by recesses 50, 40) is reduced and projections ~as for example at 45) are more uniformly coated. The quality of the bonding interface with any patching coat applied to the bonding agent M is thereby improved. In this regard, reference is made to Figure 4-- wherein there is shown a patching coat P applied to the surface presented by the layer of the bonding agent M.
In Figure 4 patching compound P is shown applied to the bonding agent M as referred to in Figure 2.
Exaggerated zones A and B are illustrated to depict the total encapsulation with epoxy ladened material of each granule within the patching compound, even at the boundary of the bonding agent layer, unlike that of the generally taught adhesive bridge (as illustrated in Figure 3) wherein particles of a similar patch would come into direct contact with cracks and crevices of the damaged surface 15.
Preferably the I.ayer of bond:i.ng ayent M. is characterized by the following constituents:
TABI.E 1 - BONDING AGENT
EPOXY COMPONENTS
TRADE
ITEM DEscRIPTION % BY WEIGHT GENERIC DESCRIPTION
1 "DER 331" 24.4 Liquid Epoxy Resin :
~2~7~7S
1 Trade ItemDescription % By WeightGeneric ~escription Der is a registered trade mark of the DOW
Chemical Company of Midland Michigan 2"TOLUOL" 6.5 Diluent 3"ATOMITE" 17.8Calcium Carbonate (a registered trade mark (Fine Ground Calcium of Thompson Weinman and Carbonate) Company) 4"MULTIFLEX MM" 3.0Precipitated Calcium Carbonate Multiflex MM is a registered trade mark of the Diamond Shamrock Corporation of Cleveland, Ohio 5"CALEDRIA" 1.2 Thickening Agent HARDENER COMPONENTS
Trade I-temDescription % ~y ~eigh~~Ll~ C~LLe~LQ~
6"VERSAM:[DE l.~()" L~.0Ikl.tclener; :I.ow v:i.scos:Lty Polyam.ide Resin 7 "TOLUOL" 7.1 Diluent 8"DMP 30" 1.0 Accelerator a registered 2,4,6-Tri(demethyl-trade mark of Rohm aminomethylphenol) & Haas Company of Philadelphia P.A.
,~, ~..,~
~2~5775 9"NONYL PHENOL" 12.1Accelerator; high viscosity (mixture of predominantl para-substituted monoalk~
phenols) 10"ATOMITE" 11.9Calcium Carbonate (fine ground calcium (a registered trade mark carbonate) of Thompson, Weinman and Company) 11"MULTIFLEX MM" 1.8Precipitated Calcium Carbonate Multiflex MM is a registered trade mark of the Diamond Shamrock 15Corporation of Cleveland, Ohio 12 'CALEDRIA" 1,2 Thickening Agent Preferably the Layer of Patching agent is characterized by the following consti-tuents:
EPOXY COMPONF,NTS
TR~DF
ITEMDE.'C ~IP'~IQ~ Y_~EI~ e~ ' CAI~
1"71 SILICA SAND" 39.3 2"#30 SILICA SAND" 39.3 3"ARALDITE 507" 9.3Modifi.ed low viscosity a registered trade epoxy resin (low mark of the Ciba-Geigy tendency to crystalize) Corporation. Ardsley, N.Y.
4"TITANIUM DIOXIDE" 0.2Whitening Agent , ~ .
~7S'775 Trade Item Description % By Weight Generic Description "CARBON" 0.1 Blackening Agent ~aRDEN~R COMPON~NTS
Trade Item Descrip~ion % By Weight Generic Description 6 "ARALDITE 1l,8 Liquid Hardener-~Y 955" Modified liquid polyamid a registered trade mark of the Ciba-Geigy Corporation. Ardsley, N.Y.
With reference to Tables 1 and 2, testing various proportions and components has, unexpectedly, shown that the proportions and components in the above-mentioned tables offer the exact characteri.stics sought;
namely, resiliency, economy, durability and ease of use.
With reference to the admixture in Table l, a bonding agent suitable for use as an adhesive bridge is thereby provided having characteristics of resiliency and sufficient v.iscosi-ty for coveri.ng the damat3c-~d area is vertically i.nc~irleci. ~:Lth rc-f.ererlce t..o the admixture in Table 2, a patching compound is thereby provided having adhesive characteristics, resiliency, and sufficient viscosity for covering the damaged area of a concrete body without the assistance of forms. The adhesive characteris-tics of the bonding agent and the patching compound provide for a generally uniform bonding interface between _ g _ 77~
l the two.
With reference to the admixture in Table l, it has been found that by incorporating nonyl phenol as a secondary accelerator, that the resulting admixture has less of a tendency to crystalize at low temperature, thereby enhancing the resiliency of the bonding agent. Normally a mixture of epoxy resin and hardener when first mixed together has a low viscosity because of the exothermic reaction. Accordingly, many coats of the epoxy-hardener mixture are required to achieve sufficient coverage of the damaged area. Unexpectedly, according to the present invention, the addition of binding and thickening agents, preferably calcium carbonate and caledria, provides for a bonding agent suitable for use as an adhesive bridge having viscous characteristics suitable for applying the bonding agent in a single coat of generally uniform thickness. With reference to the patching compound disclosed in Table 2, the same is epoxy based. Unexpectedly, the epoxy based patching compound provides an admixture which is easily applied -- once dry the combination in the kit of the epoxy based patching compound and the epoxy based bonding agent provides a patch which is extremely durable and has a tendency not to breakdown with the expansion and contraction of the concrete body according to changes in the ambient temperature.
As many changes can be made to the preferred embodiments without departing from the scope oE the invention, it is intended that all matter contained herein be interpreted as illustrative on the invention and not in a limiting sense.
", ~.~
,~, ~..,~
~2~5775 9"NONYL PHENOL" 12.1Accelerator; high viscosity (mixture of predominantl para-substituted monoalk~
phenols) 10"ATOMITE" 11.9Calcium Carbonate (fine ground calcium (a registered trade mark carbonate) of Thompson, Weinman and Company) 11"MULTIFLEX MM" 1.8Precipitated Calcium Carbonate Multiflex MM is a registered trade mark of the Diamond Shamrock 15Corporation of Cleveland, Ohio 12 'CALEDRIA" 1,2 Thickening Agent Preferably the Layer of Patching agent is characterized by the following consti-tuents:
EPOXY COMPONF,NTS
TR~DF
ITEMDE.'C ~IP'~IQ~ Y_~EI~ e~ ' CAI~
1"71 SILICA SAND" 39.3 2"#30 SILICA SAND" 39.3 3"ARALDITE 507" 9.3Modifi.ed low viscosity a registered trade epoxy resin (low mark of the Ciba-Geigy tendency to crystalize) Corporation. Ardsley, N.Y.
4"TITANIUM DIOXIDE" 0.2Whitening Agent , ~ .
~7S'775 Trade Item Description % By Weight Generic Description "CARBON" 0.1 Blackening Agent ~aRDEN~R COMPON~NTS
Trade Item Descrip~ion % By Weight Generic Description 6 "ARALDITE 1l,8 Liquid Hardener-~Y 955" Modified liquid polyamid a registered trade mark of the Ciba-Geigy Corporation. Ardsley, N.Y.
With reference to Tables 1 and 2, testing various proportions and components has, unexpectedly, shown that the proportions and components in the above-mentioned tables offer the exact characteri.stics sought;
namely, resiliency, economy, durability and ease of use.
With reference to the admixture in Table l, a bonding agent suitable for use as an adhesive bridge is thereby provided having characteristics of resiliency and sufficient v.iscosi-ty for coveri.ng the damat3c-~d area is vertically i.nc~irleci. ~:Lth rc-f.ererlce t..o the admixture in Table 2, a patching compound is thereby provided having adhesive characteristics, resiliency, and sufficient viscosity for covering the damaged area of a concrete body without the assistance of forms. The adhesive characteris-tics of the bonding agent and the patching compound provide for a generally uniform bonding interface between _ g _ 77~
l the two.
With reference to the admixture in Table l, it has been found that by incorporating nonyl phenol as a secondary accelerator, that the resulting admixture has less of a tendency to crystalize at low temperature, thereby enhancing the resiliency of the bonding agent. Normally a mixture of epoxy resin and hardener when first mixed together has a low viscosity because of the exothermic reaction. Accordingly, many coats of the epoxy-hardener mixture are required to achieve sufficient coverage of the damaged area. Unexpectedly, according to the present invention, the addition of binding and thickening agents, preferably calcium carbonate and caledria, provides for a bonding agent suitable for use as an adhesive bridge having viscous characteristics suitable for applying the bonding agent in a single coat of generally uniform thickness. With reference to the patching compound disclosed in Table 2, the same is epoxy based. Unexpectedly, the epoxy based patching compound provides an admixture which is easily applied -- once dry the combination in the kit of the epoxy based patching compound and the epoxy based bonding agent provides a patch which is extremely durable and has a tendency not to breakdown with the expansion and contraction of the concrete body according to changes in the ambient temperature.
As many changes can be made to the preferred embodiments without departing from the scope oE the invention, it is intended that all matter contained herein be interpreted as illustrative on the invention and not in a limiting sense.
", ~.~
Claims (2)
1. A kit for repairing spauled or broken concrete comprising:
a) a pre-mixed bonding agent for uniformly coating the concrete surface to be repaired; said bonding agent comprising more than one premixture containing an expoxy resin and hardening agent separately contained until mixed together prior to use; said epoxy resin also blended with, a diluent, a filler, a binder, and a thickening agent;
said hardening agent also blended with a diluent, a first accelerator, a second accelerator, a binder and a thickening agent; whereby when the epoxy resin mixture and the hardening mixture are mixed a bonding agent is formed having a viscosity characterized by good adhesion when first applied to a concrete surface and when said bonding agent dries having resilient characteristics;
b) a patching compound used in conjunction with said bonding agent comprising at least two premixtures containing an epoxy resin and a hardening agent separately contained until mixed together prior to use; at least one of the epoxy resin and the hardening agent blended with aggregate material; whereby when the epoxy resin mixture and the hardening agent mixture are mixed a patching compound is formed having viscosity characterized by good adhesion when first applied to said bonding agent and when said patching compound dries having resilient characteristics;
c) whereby the bonding interface formed between said bonding agent and said patching compound is characterized by a generally uniform interface, and which interface is resilient, responding to freeze/thaw cycles resulting in the expansion and contraction of the substrate concrete body being repaired, thereby increasing the life of the patch applied.
a) a pre-mixed bonding agent for uniformly coating the concrete surface to be repaired; said bonding agent comprising more than one premixture containing an expoxy resin and hardening agent separately contained until mixed together prior to use; said epoxy resin also blended with, a diluent, a filler, a binder, and a thickening agent;
said hardening agent also blended with a diluent, a first accelerator, a second accelerator, a binder and a thickening agent; whereby when the epoxy resin mixture and the hardening mixture are mixed a bonding agent is formed having a viscosity characterized by good adhesion when first applied to a concrete surface and when said bonding agent dries having resilient characteristics;
b) a patching compound used in conjunction with said bonding agent comprising at least two premixtures containing an epoxy resin and a hardening agent separately contained until mixed together prior to use; at least one of the epoxy resin and the hardening agent blended with aggregate material; whereby when the epoxy resin mixture and the hardening agent mixture are mixed a patching compound is formed having viscosity characterized by good adhesion when first applied to said bonding agent and when said patching compound dries having resilient characteristics;
c) whereby the bonding interface formed between said bonding agent and said patching compound is characterized by a generally uniform interface, and which interface is resilient, responding to freeze/thaw cycles resulting in the expansion and contraction of the substrate concrete body being repaired, thereby increasing the life of the patch applied.
2. A kit for repairing spauled or broken concrete comprising:
a) a pre-mixed bonding agent for uniformly coating the surface to be repaired; said bonding agent comprising two pre-mixtures containing a liquid epoxy resin and a hardening agent separately contained until mixed together prior to use; said first pre-mixture comprising epoxy resin being a liquid and included therein at approximately 24.4%
by weight of the said bonding agent, also blended with toluol at approximately 6.5% by weight, fine ground calcium carbonate at approximately 17.8% by weight, precipitated calcium carbonate at approximately 3.0% by weight and a thickening agent at approximately 1.2% by weight; said second pre-mixture comprising a hardening agent having a low viscosity polyamide resin and included therein at approximately 12.0 % by weight of the bonding agent blended with toluol at approximately 7.1 % by weight, 2,4,6 -Tri(dimethylaminomethyl) phenol at approximately 1.0% by weight, nonyl phenol at approximately 12.1% by weight, fine ground calcium carbonate at approximately 11.9% by weight, precipitated calcium carbonate at approximately 1.8% by weight and a thickening agent at approximately 1.2% by weight; whereby when said first pre-mixture and said second pre-mixture are mixed a bonding agent is formed having a viscosity characterized by good adhesion when first applied to a concrete surface and when said bonding agent dries having resilient characteristics;
b) a patching compund used in conjunction with said bonding agent comprising a third and fourth pre-mixture, containing an epoxy resin and a hardening agent separately contained until mixed together prior to use; said third pre-mixture comprising a modified epoxy resin of low viscosity having a low tendency to crystalize at approximately 9.3%
by weight of the patching compound, also blended with coarse silica sand at approximately 39.3% by weight, and fine silica sand at approximately 39.3% by weight, said fourth pre-mixture comprising a modified liquid polyamide at approximately 11.8% by weight of the patching component; whereby when said third pre-mixture and said fourth pre-mixture are mixed a patching compound is formed having viscosity characterized by good adhesion when first applied to said bonding agent and when said patching compound dries having resilient characteristics;
c) whereby the bonding interface formed between said bonding agent and said patching compound is characterized by a generally uniform interface, and which interface is resilient, responding to freeze/thaw cycles resulting in the expansion and contraction of the substrate concrete body being repaired, thereby increasing the life of the patch applied.
a) a pre-mixed bonding agent for uniformly coating the surface to be repaired; said bonding agent comprising two pre-mixtures containing a liquid epoxy resin and a hardening agent separately contained until mixed together prior to use; said first pre-mixture comprising epoxy resin being a liquid and included therein at approximately 24.4%
by weight of the said bonding agent, also blended with toluol at approximately 6.5% by weight, fine ground calcium carbonate at approximately 17.8% by weight, precipitated calcium carbonate at approximately 3.0% by weight and a thickening agent at approximately 1.2% by weight; said second pre-mixture comprising a hardening agent having a low viscosity polyamide resin and included therein at approximately 12.0 % by weight of the bonding agent blended with toluol at approximately 7.1 % by weight, 2,4,6 -Tri(dimethylaminomethyl) phenol at approximately 1.0% by weight, nonyl phenol at approximately 12.1% by weight, fine ground calcium carbonate at approximately 11.9% by weight, precipitated calcium carbonate at approximately 1.8% by weight and a thickening agent at approximately 1.2% by weight; whereby when said first pre-mixture and said second pre-mixture are mixed a bonding agent is formed having a viscosity characterized by good adhesion when first applied to a concrete surface and when said bonding agent dries having resilient characteristics;
b) a patching compund used in conjunction with said bonding agent comprising a third and fourth pre-mixture, containing an epoxy resin and a hardening agent separately contained until mixed together prior to use; said third pre-mixture comprising a modified epoxy resin of low viscosity having a low tendency to crystalize at approximately 9.3%
by weight of the patching compound, also blended with coarse silica sand at approximately 39.3% by weight, and fine silica sand at approximately 39.3% by weight, said fourth pre-mixture comprising a modified liquid polyamide at approximately 11.8% by weight of the patching component; whereby when said third pre-mixture and said fourth pre-mixture are mixed a patching compound is formed having viscosity characterized by good adhesion when first applied to said bonding agent and when said patching compound dries having resilient characteristics;
c) whereby the bonding interface formed between said bonding agent and said patching compound is characterized by a generally uniform interface, and which interface is resilient, responding to freeze/thaw cycles resulting in the expansion and contraction of the substrate concrete body being repaired, thereby increasing the life of the patch applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000520942A CA1275775C (en) | 1986-10-21 | 1986-10-21 | Concrete repair kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000520942A CA1275775C (en) | 1986-10-21 | 1986-10-21 | Concrete repair kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1275775C true CA1275775C (en) | 1990-11-06 |
Family
ID=4134183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000520942A Expired - Lifetime CA1275775C (en) | 1986-10-21 | 1986-10-21 | Concrete repair kit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1275775C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007042626A1 (en) * | 2005-10-11 | 2007-04-19 | Rm Distribution | Wall coating polishing roller and method for making same |
| WO2010043908A1 (en) * | 2008-10-17 | 2010-04-22 | Gareth Glass | Sacrificial anodes in concrete patch repair |
| US20100227171A1 (en) * | 2009-03-06 | 2010-09-09 | Gene Raymond Thomas | Surface coating and restoration |
| CN113090057A (en) * | 2021-03-12 | 2021-07-09 | 满洲里达赉湖热电有限公司 | Corrosion prevention and repair method for leakage of water tower |
-
1986
- 1986-10-21 CA CA000520942A patent/CA1275775C/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007042626A1 (en) * | 2005-10-11 | 2007-04-19 | Rm Distribution | Wall coating polishing roller and method for making same |
| WO2010043908A1 (en) * | 2008-10-17 | 2010-04-22 | Gareth Glass | Sacrificial anodes in concrete patch repair |
| GB2477240A (en) * | 2008-10-17 | 2011-07-27 | Gareth Kevin Glass | Sacrificial anodes in concrete patch repair |
| GB2477240B (en) * | 2008-10-17 | 2012-10-31 | Gareth Kevin Glass | Sacrificial anodes in concrete patch repair |
| US20100227171A1 (en) * | 2009-03-06 | 2010-09-09 | Gene Raymond Thomas | Surface coating and restoration |
| CN113090057A (en) * | 2021-03-12 | 2021-07-09 | 满洲里达赉湖热电有限公司 | Corrosion prevention and repair method for leakage of water tower |
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