CN116396034A - Composite surface layer structure - Google Patents
Composite surface layer structure Download PDFInfo
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- CN116396034A CN116396034A CN202310345858.0A CN202310345858A CN116396034A CN 116396034 A CN116396034 A CN 116396034A CN 202310345858 A CN202310345858 A CN 202310345858A CN 116396034 A CN116396034 A CN 116396034A
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- 239000002344 surface layer Substances 0.000 title abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 88
- 239000013305 flexible fiber Substances 0.000 claims abstract description 41
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 25
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Classifications
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a composite surface layer structure, which comprises: comprising a substrate comprising a matrix, rigid fibers and flexible fibers, said rigid fibers and said flexible fibers being dispersed in said matrix. Therefore, the cracking strength of the composite surface layer structure is effectively improved, the expansion of the crack width is controlled, the ductility of the matrix in tension is increased, the ultimate tensile strength of the base material is improved, the bearing capacity of the composite surface layer structure is improved, and the damage tolerance of the reinforced member is improved. Meanwhile, the composite surface layer structure has the advantages of small occupied area, short construction period and low engineering comprehensive cost.
Description
Technical Field
The application relates to the technical field of engineering structure reinforcement, in particular to a composite surface layer structure.
Background
Earthquake is a natural disaster which is difficult to predict, and has the characteristics of strong randomness, large destructiveness and the like. Under the action of earthquake, the collapse of the house structure is the most main cause of economic loss and casualties. Early-stage buildings in China mainly comprise masonry structure buildings and concrete structure buildings, are limited by the current economic level, technical level, standard level and the like, have low design standards and low earthquake resistance level (the buildings before 1980 generally have no earthquake resistance fortification). Taking the existing masonry structure building as an example, most of the masonry structure building is built in the 70-80 th century, the strength of building blocks and masonry mortar is generally low, the bearing capacity of components is insufficient, the problem of structural performance degradation under long-term service is outstanding, and the house is compact in house type and has no anti-seismic construction measures. The present application aims to propose a composite facing structure to solve the above-mentioned problems.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
In one aspect of the present invention, a composite facing structure is presented comprising: comprising a substrate comprising a matrix, rigid fibers and flexible fibers, said rigid fibers and said flexible fibers being dispersed in said matrix. Therefore, the cracking strength of the composite surface layer structure is effectively improved, the expansion of the crack width is controlled, the ductility of the matrix in tension is increased, the ultimate tensile strength of the base material is improved, the bearing capacity of the composite surface layer structure is improved, and the damage tolerance of the reinforced member is improved. Meanwhile, the composite surface layer structure has the advantages of small occupied area, short construction period and low engineering comprehensive cost.
According to some embodiments of the invention, the substrate comprises: 60-99.6 parts by weight of matrix; 0.3-30 parts by weight of rigid fiber; and 0.1-2 parts by weight of flexible fiber.
According to some embodiments of the invention, the composite facing structure further comprises: the reinforcing layer comprises at least one of fiber reinforced composite material mesh cloth, fiber reinforced composite material rib mesh cloth, high-strength steel wire mesh cloth and steel bar mesh cloth.
According to some embodiments of the invention, the matrix comprises: 5-90 parts by weight of hydraulic gel material; 0-50 parts by weight of admixture; 0-50 parts of aggregate; 0.1 to 3.0 parts by weight of an additive; 5-30 parts of water.
According to some embodiments of the invention, the rigid fibers are first surface treated rigid fibers, the flexible fibers are second surface treated flexible fibers, and the first surface treatment and the second surface treatment independently comprise: at least one of plasma treatment, silane coupling agent treatment, sizing agent treatment, graphene oxide treatment, oiling treatment, ozone treatment, carbon nanofiber treatment and nano silicon dioxide treatment.
According to some embodiments of the invention, the rigid fibers comprise at least one of basalt fibers, glass fibers, carbon fibers, steel fibers, and whisker fibers; the flexible fiber comprises at least one of nylon fiber, polypropylene fiber, polyvinyl alcohol fiber, polyethylene fiber, polyester fiber, aramid fiber and poly (p-phenylene benzobisoxazole) fiber.
According to some embodiments of the invention, the hydraulic gel material comprises at least one of composite portland cement, ordinary portland cement, high belite portland cement, aluminate cement, sulphoaluminate cement, high belite sulphoaluminate cement, and a geopolymer.
According to some embodiments of the invention, the admixture comprises at least one of nano-silica, micro-silica, silica fume, slag powder, steel slag powder, fly ash, limestone powder, rice hull ash, rubber powder, zeolite powder, glass beads, and fly ash beads.
According to some embodiments of the invention, the aggregate comprises at least one of quartz stone powder, limestone powder, corundum micropowder, river sand, quartz sand, corundum sand, sea sand, and zeolite.
According to some embodiments of the invention, the admixture comprises at least one of a water reducing agent, a thickener, an early strength agent, and a retarder.
According to some embodiments of the invention, the fiber reinforced composite scrim comprises at least one of a continuous carbon fiber composite grid, a continuous basalt fiber composite grid, a continuous glass fiber composite grid, and a continuous aramid fiber composite grid.
According to some embodiments of the invention, at least one of a continuous glass fiber composite reinforcement, a continuous basalt fiber composite reinforcement, a continuous glass fiber composite reinforcement, and a continuous aramid fiber composite reinforcement.
According to some embodiments of the invention, the composite facing structure has a thickness of 5mm to 30mm.
According to some embodiments of the invention, the rigid fibers include monofilament fibers and coarse fibers; and/or the flexible fibers comprise monofilament fibers and coarse fibers.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a schematic representation of a composite facing structure in accordance with one embodiment of the present invention;
FIG. 2 shows a schematic representation of a composite facing structure according to another embodiment of the present invention;
FIG. 3 shows a schematic representation of a composite facing structure according to another embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of an FRP grid cloth according to one embodiment of the present invention;
FIG. 5 is a schematic view showing the structure of an FRP rib mesh sheet according to an embodiment of the present invention;
FIG. 6 shows a schematic view of a masonry wall according to one embodiment of the present invention;
FIG. 7 shows a cross-sectional view of FIG. 6 along the direction BB';
FIG. 8 shows a schematic view of a reinforced concrete column in accordance with one embodiment of the invention;
FIG. 9 shows a cross-sectional view of FIG. 8 along the direction AA';
fig. 10 shows the results of the surface layer structure performance test in example 1 and comparative examples 1 to 3.
Reference numerals:
1: a composite facing structure; 11: a substrate; 21: fiber reinforced composite mesh cloth; 22: fiber reinforced composite reinforcement mesh; 3: brickwork wall; 4: building blocks; 5: a mortar joint; 6: reinforced concrete column; 61: longitudinal ribs of the reinforced concrete column; 62: stirrups of the reinforced concrete column; 63: reinforced concrete column foundation.
Detailed Description
Embodiments of the present invention are described in detail below. The following examples are illustrative only and are not to be construed as limiting the invention. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The common reinforcement method for concrete structures and masonry structures in the related art is a direct reinforcement method, namely, the stress performance and durability of the member are improved by a surface layer reinforcement method. The traditional reinforcing surface layer comprises a reinforced concrete surface layer and a reinforced net cement mortar surface layer, the construction method is simple, the wet operation period is long, the self weight of the structure is increased, the height of a building layer and the indoor use area are weakened, and the bearing capacity and the ductility of the surface layer are limited.
In one aspect of the present application, a composite facing structure 1 is presented, referring to fig. 1, the composite facing structure 1 comprising a substrate 11, the substrate 11 comprising a matrix, rigid fibers and flexible fibers, the rigid fibers and the flexible fibers being dispersed in the matrix. From this, effectively improve the cracking strength of compound surface course structure 1, control the extension of crack width, increase the ductility of matrix when drawing, improve the ultimate tensile strength of substrate 11, improve compound surface course structure 1's bearing capacity, reduce compound surface course structure 1's thickness, promote compound surface course structure 1 and by the life and the durability under special environment of reinforcement repair structure, promote by the damage tolerance of reinforcement. Meanwhile, the composite surface layer structure 1 is small in occupied area, short in construction period and low in engineering comprehensive cost.
The principle of the present application capable of achieving the above-mentioned beneficial effects will be described in detail as follows:
the composite surface layer structure 1 provided by the application comprises the rigid fibers and the flexible fibers, wherein the rigid fibers can effectively improve the cracking strength of the matrix, inhibit or delay the generation of micro cracks, and even if the matrix is cracked, the flexible fibers can control the width expansion of the cracks, realize saturated multipoint cracking and improve the tensile ductility of the matrix; the rigid fibers and the flexible fibers may together increase the ultimate tensile strength of the substrate 11. Because the composite surface layer structure 1 containing the rigid fibers and the flexible fibers has good crack control performance, the crack width can be controlled within 50 mu m, 100 mu m or 200 mu m according to performance requirements, the corrosion of external bad mediums can be effectively inhibited, and the service lives of the composite surface layer structure 1 and the reinforced repair structure and the durability under special environments are prolonged. In addition, the composite facing structure 1 exhibits extremely high ductility and toughness in tension, compression, bending and shearing, thereby delaying the failure of the reinforced structure or member and improving the damage tolerance of the reinforced structure or member. When the composite surface layer structure 1 containing the rigid fibers and the flexible fibers is used for reinforcing the existing structural member, the composite surface layer structure 1 has the characteristics of high strength and high ductility, so that the earthquake resistance and the reinforcement of the existing structural member can be realized by the thinner thickness, the thickness is far lower than that of the traditional reinforced surface layer by about 100mm, and the influence on the using functions of a room is small; in addition, the composite surface layer structure 1 does not need to penetrate through a wall to punch holes in the construction process, a formwork is not needed, the construction period is short, the disturbance is small, and the engineering comprehensive cost is low.
According to some embodiments of the present invention, the relative amounts of matrix, rigid fibers and flexible fibers in the substrate 11 are not particularly limited, and those skilled in the art may design depending on the specific use and strength requirements of the composite facing structure 1. Specifically for the present application, the substrate 11 includes: 60 to 99.6 parts by weight of matrix; 0.3 to 30 parts by weight of rigid fiber; 0.1 to 2 parts by weight of flexible fiber. If the content of the rigid fiber is too large, the reinforcing and toughening effects of the flexible fiber may be suppressed, and the difficulty of dispersing the rigid fiber may be increased to some extent. If the content of the flexible fiber is too high, the difficulty in dispersing the fiber may be increased, and the uniformity of the surface layer structure may be affected.
According to some embodiments of the invention, the matrix may comprise: 5 to 90 parts by weight of a hydraulic gel material may be, for example, 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, 50 parts by weight, 55 parts by weight, 60 parts by weight, 65 parts by weight, 70 parts by weight, 75 parts by weight, 80 parts by weight, 85 parts by weight, or the like; the blending material is 0 to 50 parts by weight, for example, the blending material may be 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight or the like; 0 to 50 parts by weight of an aggregate, for example, the aggregate may be 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight or the like; 0.1 to 3.0 parts by weight of an additive, for example, the additive may be 0.5 parts by weight, 1.0 parts by weight, 1.5 parts by weight, 2.0 parts by weight, 2.5 parts by weight, or the like; the water is 5 to 30 parts by weight, and for example, the water may be 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, or the like. If the hydraulic gel material is too little, the molding difficulty of the composite surface layer structure 1 can be increased, and the strength of the composite surface layer structure 1 is lower; if the hydraulic gel material is too much, it may cause an increase in the cost of the composite facing structure 1 and an increase in early cracks. If the admixture is too much, the strength of the composite facing construction 1 may be reduced. If the aggregate is too much, the manufacturing difficulty of the composite surface layer structure 1 can be obviously increased, and the homogeneity of the composite surface layer structure 1 is reduced. If the content of the additive is too large, the cost is increased and no contribution to the performance of the facing layer is made.
In order to further improve the load-bearing capacity and ductility of the composite facing structure 1 according to some embodiments of the present invention, the composite facing structure 1 may further include a reinforcing layer including at least one of a fiber reinforced composite mesh (FRP mesh) 21, a fiber reinforced composite tendon mesh (FRP tendon mesh) 22, a high-strength steel mesh, and a steel mesh, referring to fig. 1 to 3. Specifically, the reinforcing layer may be one or a combination of more than two of FRP mesh cloth 21, FRP reinforcement mesh sheet 22, high-strength steel wire mesh cloth and reinforcement mesh sheet. According to some embodiments of the present invention, the specific structure of the FRP mesh may be referred to fig. 4, and the specific structure of the fpr tendon mesh may be referred to fig. 5.
The specific location of the reinforcing layer in the composite facing layer structure 1 is not particularly limited, and for example, the reinforcing layer may be located on the surface of the layer of the substrate 11 (not shown in the drawings), or the reinforcing layer may be embedded inside the substrate 11 (refer to fig. 1 to 3). The number of the reinforcing layers is not particularly limited, and when a plurality of reinforcing layers are contained, the plurality of reinforcing layers may be embedded in the inside of the substrate 11, or the plurality of reinforcing layers may be located on the surface of the substrate 11, or a part of the reinforcing layers may be embedded in the inside of the substrate 11, and a part of the reinforcing layers may be located on the surface of the substrate 11.
According to some embodiments of the present invention, since the composite surface layer structure 1 has a certain deformability, the deformability of the composite surface layer structure 1 is formed by extending a plurality of cracks, and when the composite surface layer structure 1 needs to have a strong deformability, the surface of the rigid fiber and the flexible fiber is not required to be treated, and at this time, the rigid fiber and the flexible fiber are connected with the substrate through weak friction force.
According to other embodiments of the present invention, when the strength of the matrix itself is low, the interaction between the rigid fiber and the flexible fiber and the matrix is small, and in order to enhance the interaction between the rigid fiber and the flexible fiber and the matrix, to prevent the crack from continuously expanding in width, the rigid fiber may be a rigid fiber subjected to a first surface treatment, and the flexible fiber may be a flexible fiber subjected to a second surface treatment, and the methods of the first surface treatment and the second surface treatment independently include: at least one of plasma treatment, silane coupling agent treatment, sizing agent treatment, graphene oxide treatment, oiling treatment, ozone treatment, carbon nanofiber treatment and nano silicon dioxide treatment. It should be noted that the treatment methods of the rigid fibers and the flexible fibers may be the same or different, and specifically, may be selected according to the specific performance requirements of the composite surface layer structure 1.
According to some embodiments of the invention, the rigid fibers comprise at least one of basalt fibers, glass fibers, carbon fibers, steel fibers, and whisker fibers. Specifically, the rigid fiber may be one or a combination of more than two of basalt fiber, glass fiber, carbon fiber, steel fiber and whisker fiber. Therefore, the formation and development of cracks of the composite surface layer structure 1 can be effectively inhibited, and the strength and toughness of the composite surface layer structure 1 are improved.
According to some embodiments of the invention, the flexible fibers include at least one of nylon fibers, polypropylene fibers, polyvinyl alcohol fibers, polyethylene fibers, polyester fibers, aramid fibers, and poly-p-phenylene benzobisoxazole fibers. Specifically, the flexible fiber may be one or a combination of more than two of nylon fiber, polypropylene fiber, polyvinyl alcohol fiber, polyethylene fiber, polyester fiber, aramid fiber and poly (p-phenylene benzobisoxazole) fiber. Thereby, the strength and ductility of the composite facing structure 1 can be significantly improved.
According to some embodiments of the invention, the hydraulic gel material comprises at least one of composite portland cement, ordinary portland cement, high belite portland cement, aluminate cement, sulphoaluminate cement, high belite sulphoaluminate cement and geopolymer, and in particular, the hydraulic gel material may be a composition of one or more of composite portland cement, ordinary portland cement, high belite portland cement, aluminate cement, sulphoaluminate cement, high belite sulphoaluminate cement and geopolymer.
According to some embodiments of the invention, the admixture comprises at least one of nano-silica, micro-silica, silica fume, slag powder, steel slag powder, fly ash, limestone powder, rice hull ash, rubber powder, zeolite powder, glass beads and fly ash beads, and in particular, the admixture may be one or a combination of more than two of nano-silica, micro-silica, silica fume, slag powder, steel slag powder, fly ash, limestone powder, rice hull ash, rubber powder, zeolite powder, glass beads and fly ash beads.
According to some embodiments of the invention, the aggregate comprises at least one of quartz stone powder, limestone powder, corundum micropowder, river sand, quartz sand, corundum sand, sea sand, and zeolite. Specifically, the aggregate can be one or a combination of more than two of quartz stone powder, limestone powder, corundum micropowder, river sand, quartz sand, corundum sand, sea sand and zeolite.
According to some embodiments of the invention, the admixture comprises at least one of a water reducing agent, a thickener, an early strength agent, and a retarder. Specifically, the additive can be one or a combination of more than two of water reducing agent, thickener, early strength agent and retarder.
According to some embodiments of the invention, the FRP mesh cloth includes at least one of a continuous carbon fiber composite mesh (CFRP mesh cloth), a continuous basalt fiber composite mesh (BFRP mesh cloth), a continuous glass fiber composite mesh (GFRP mesh cloth), and a continuous aramid fiber composite mesh (AFRP mesh cloth). Specifically, the FRP mesh cloth may be one or a combination of two or more of CFRP mesh cloth, BFRP mesh cloth, GFRP mesh cloth, and AFRP mesh cloth.
According to some embodiments of the invention, the FRP reinforcement mesh comprises at least one of a continuous glass fiber composite reinforcement (CFRP reinforcement), a continuous basalt fiber composite reinforcement (BFRP reinforcement), a continuous glass fiber composite reinforcement (GFRP reinforcement), and a continuous aramid fiber composite reinforcement (AFRP reinforcement). Specifically, the FRP rib mesh sheet may be one or a combination of more than two of CFRP rib mesh sheet, BFRP rib mesh sheet, GFRP rib mesh sheet and AFRP rib mesh sheet.
According to some embodiments of the present invention, the thickness of the composite facing structure 1 is not particularly limited, and one skilled in the art may design according to the specific use of the composite facing structure 1. The thickness of the composite facing structure 1 may be 5mm to 30mm, for example, 10mm, 15mm, 20mm, 25mm, or the like. Therefore, compared with the traditional reinforcement surface layer with the thickness of about 100mm, the space occupied by the composite surface layer structure can be greatly reduced.
According to some embodiments of the invention, the rigid fibers include monofilament fibers and coarse fibers; and/or the flexible fibers include monofilament fibers and coarse fibers. Specifically, the rigid fibers and the flexible fibers may be monofilament fibers, the diameter of the monofilament fibers may be 50 μm or less, the rigid fibers and the flexible fibers may be coarse fibers, and the diameter of the coarse fibers may be 50 μm or more.
The method of making the composite facer structure 1 according to some embodiments of the present invention is not particularly limited, and may be, for example, by preform molding. Specifically, the composite surface layer substrate 11 is cast on a specific mold, and the reinforcing layer is arranged before the casting of the substrate 11 or during the casting of the substrate 11 or after the casting of the substrate 11, and the composite surface layer substrate is cured for 28 days to be molded. The number of days of curing is not particularly limited, and may be selected according to the specific material, thickness, and use of the composite surface layer structure 1.
According to other embodiments of the present invention, the composite surface layer structure 1 may also be formed by cast-in-place molding, specifically, the substrate 11 may be cast by in-situ compression, spraying or formwork casting, and the reinforcing layer may be disposed before the casting of the substrate 11 or during the casting of the substrate 11 or after the casting of the substrate 11, and the composite surface layer structure may be molded after curing for 28 days.
The specific application of the composite surface layer structure 1 is not particularly limited, and may be used, for example, to reinforce the surface of the old brick masonry wall 3, or to reinforce the surface of a reinforced concrete pattern, or to reinforce the slope of an active dam, or to reinforce the pavement of an airport, highway, bridge deck pavement, harbor roads, yard pavement, or the like. When the composite surface layer structure 1 is used in different scenes, different materials and different thicknesses can be selected, and the specific is not particularly limited.
According to some embodiments of the present invention, referring to fig. 6 and 7, when the composite facing structure 1 is used to reinforce the brickwork wall 3, the brickwork wall 3 includes a plurality of blocks 4, and mortar joints 5 are formed between two adjacent blocks 4, and the composite facing structure 1 may be disposed on two layers of the brickwork wall 3 to reinforce the brickwork wall 3.
According to further embodiments of the present invention, referring to fig. 8 and 9, when the composite surface layer structure 1 is used for reinforcing a reinforced concrete column 6, a reinforced concrete column foundation 63 is disposed under the reinforced concrete column 6, the reinforced concrete column 6 includes a reinforced concrete column longitudinal rib 61 and a reinforced concrete column stirrup 62, the composite surface layer structure 1 may reinforce a vulnerable area of the reinforced concrete column 6, for example, a column bottom of the reinforced concrete column 6, and at this time, the composite surface layer structure 1 may reinforce around a surface of the reinforced concrete column 6.
Example 1
43 parts by weight of cement, 2 parts by weight of silica fume, 17 parts by weight of primary fly ash, 20 parts by weight of quartz sand, 12 parts by weight of water, 0.4 part by weight of polycarboxylate water reducer, 0.6 part by weight of ultra-high molecular weight polyethylene fiber and 0.8 part by weight of basalt fiber are uniformly mixed by forced stirring, cast and molded, and standard maintenance is performed to form a composite surface layer structure.
Comparative example 1
The rest of the procedure was as in example 1, except that the facing structure comprised 36 parts by weight of cement, 9 parts by weight of silica fume, 11 parts by weight of fly ash, 18 parts by weight of quartz sand, 25 parts by weight of water, 0.09 parts by weight of polycarboxylate water reducer.
Comparative example 2
The rest of the process is the same as in example 1, except that the composite surface layer structure comprises 43 parts by weight of cement, 2 parts by weight of silica fume, 17 parts by weight of primary fly ash, 20 parts by weight of quartz sand, 12 parts by weight of water, 0.4 part by weight of polycarboxylate water reducer and 0.8 part by weight of ultra-high molecular weight polyethylene fiber.
Comparative example 3
The rest of the process is the same as in example 1, except that the composite surface layer structure comprises 33 parts by weight of cement, 8 parts by weight of silica fume, 10 parts by weight of fly ash, 16 parts by weight of quartz sand, 23 parts by weight of water, 0.08 part by weight of polycarboxylate water reducer and 10 parts by weight of basalt fiber.
The composite facing structures formed in example 1 and the facing structures formed in comparative examples 1 to 3 were subjected to bending performance test, and as a result of the test, referring to fig. 10, it can be seen from fig. 10 that when the facing structure contains only rigid fibers, the strength of the facing structure is relatively high; when the surface layer structure only contains flexible fibers, the deformation capability of the surface layer structure is good; when the composite surface layer structure contains both rigid fibers and flexible fibers, the composite surface layer structure has better strength and deformability, and can delay the damage of the reinforced structure better.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A composite facing structure comprising a substrate, the substrate comprising a matrix, rigid fibers and flexible fibers, the rigid fibers and the flexible fibers being dispersed in the matrix.
2. The composite facing structure of claim 1, wherein the substrate comprises:
60-99.6 parts by weight of matrix;
0.3-30 parts by weight of rigid fiber;
and 0.1-2 parts by weight of flexible fiber.
3. The composite facing structure of claim 1, further comprising: the reinforcing layer comprises at least one of fiber reinforced composite material mesh cloth, fiber reinforced composite material rib mesh cloth, high-strength steel wire mesh cloth and steel bar mesh cloth.
4. The composite facing structure of claim 1, wherein the matrix comprises:
5-90 parts by weight of hydraulic gel material;
0-50 parts by weight of admixture;
0-50 parts of aggregate;
0.1 to 3.0 parts by weight of an additive;
5-30 parts of water.
5. The composite facing structure of claim 1, wherein the rigid fibers are first surface treated rigid fibers and the flexible fibers are second surface treated flexible fibers, the first surface treatment and the second surface treatment each independently comprising: at least one of plasma treatment, silane coupling agent treatment, sizing agent treatment, graphene oxide treatment, oiling treatment, ozone treatment, carbon nanofiber treatment and nano silicon dioxide treatment.
6. The composite facing structure of claim 1, wherein the rigid fibers comprise at least one of basalt fibers, glass fibers, carbon fibers, steel fibers, and whisker fibers;
the flexible fiber comprises at least one of nylon fiber, polypropylene fiber, polyvinyl alcohol fiber, polyethylene fiber, polyester fiber, aramid fiber and poly (p-phenylene benzobisoxazole) fiber.
7. The composite facing structure of claim 4, wherein the hydraulic gel material comprises at least one of composite portland cement, high belite portland cement, aluminate cement, thioaluminate cement, high belite thioaluminate cement, and geopolymer;
optionally, the admixture comprises at least one of nano silica, micro silica, silica fume, slag powder, steel slag powder, fly ash, limestone powder, rice hull ash, rubber powder, zeolite powder, glass beads and fly ash beads;
optionally, the aggregate comprises at least one of quartz stone powder, limestone powder, corundum micropowder, river sand, quartz sand, corundum sand, sea sand and zeolite;
optionally, the additive comprises at least one of a water reducing agent, a thickener, an early strength agent and a retarder.
8. The composite facing structure of claim 3, wherein the fiber reinforced composite scrim comprises at least one of a continuous carbon fiber composite scrim, a continuous basalt fiber composite scrim, a continuous glass fiber composite scrim, and a continuous aramid fiber composite scrim;
optionally, the fiber reinforced composite web sheet comprises: at least one of continuous glass fiber composite rib material, continuous basalt fiber composite rib material, continuous glass fiber composite rib material and continuous aramid fiber composite rib material.
9. The composite facing structure of claim 1, wherein the thickness of the composite facing structure is from 5mm to 30mm.
10. The composite facing structure of claim 1, wherein the rigid fibers comprise monofilament fibers and coarse fibers; and/or
The flexible fibers include monofilament fibers and coarse fibers.
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