WO2015085807A1 - Procédé pour renforcer et protéger du béton à l'aide d'un matériau composite à fibres - Google Patents

Procédé pour renforcer et protéger du béton à l'aide d'un matériau composite à fibres Download PDF

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Publication number
WO2015085807A1
WO2015085807A1 PCT/CN2014/087180 CN2014087180W WO2015085807A1 WO 2015085807 A1 WO2015085807 A1 WO 2015085807A1 CN 2014087180 W CN2014087180 W CN 2014087180W WO 2015085807 A1 WO2015085807 A1 WO 2015085807A1
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WO
WIPO (PCT)
Prior art keywords
adhesive
magnesia
concrete
layer
weight
Prior art date
Application number
PCT/CN2014/087180
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English (en)
Chinese (zh)
Inventor
丁铸
李伟文
隋莉莉
李大望
董必钦
邢锋
Original Assignee
深圳大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳大学 filed Critical 深圳大学
Publication of WO2015085807A1 publication Critical patent/WO2015085807A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/14—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness

Definitions

  • the invention relates to concrete reinforcement, in particular to a method for reinforcing and protecting concrete by fiber composite material.
  • the durability of concrete has become an important issue in building structures.
  • a large amount of concrete requires huge funds due to structural deterioration, repair, reinforcement, and reinforcement.
  • the concrete structure is affected by the load and various environmental corrosive media, and the structural deterioration is gradually caused, resulting in cracks, cracks and even damage, thereby reducing the safety of the concrete structure and shortening the service life.
  • the reinforcement of concrete is mostly made of surface-bonded fiber reinforced composite materials, such as fiber reinforced composites (CFRP) composed of carbon fiber cloth and epoxy organic rubber.
  • CFRP has been widely used due to its advantages of high strength, high efficiency, light weight and convenient construction. It has formed a relatively mature technical system. China has also formulated the Code for Concrete Structure Reinforcement Design (GB). 50367-2006) and “Carbon Fiber Sheet for Structural Reinforcement Repair” (GB/T 21490-2008).
  • the epoxy-based organic glue used for pasting has the following defects: (1) The softening temperature is low, generally 60-80 ° C, and toxic gas is volatilized under high temperature and fire, and the epoxy group will be various with the human body.
  • Inorganic concrete materials have large differences in elastic modulus. Under the conditions of multiple thermal expansion and contraction and expansion and contraction, the deformation of the two materials is not coordinated, and cracks are easily generated, so the compatibility is poor.
  • Ci2351443 A Chinese invention patent application for this kind of problem (CN 102351443 A, CN201210356357) discloses a high temperature resistant alkali slag cementing material and a preparation method thereof, which can solve the problem that the epoxy organic rubber is not resistant to high temperature to a certain extent, but because the construction method is relatively cumbersome, it is not conducive to the popularization and application in engineering practice.
  • the technical problem to be solved by the present invention is to provide a method for reinforcing and protecting concrete by using a fiber composite material which is safe, environmentally friendly, long in life and simple in construction.
  • the technical solution adopted by the present invention is a method for reinforcing and protecting concrete by a fiber composite material, and an adhesive-fiber sheet reinforcing material layer is pasted on the surface of the concrete member, and the construction includes the following steps:
  • the fiber sheet is a unidirectional fiber layer or a fiber fabric layer;
  • the organic resin is one of unsaturated polyester, epoxy resin, phenolic resin, silicone glue;
  • the inorganic binder is a mixture of a phosphate cementitious material and water.
  • the fiber is a combination of one or more of glass fiber, carbon fiber, basalt fiber or aramid fiber.
  • the inorganic adhesive is a phosphate adhesive
  • the phosphate adhesive consists of the following components by weight:
  • the phosphate adhesive consists of the following components in parts by weight:
  • the retarder weight is 8%-15% by weight of the magnesia; and the weight of the water is 18-25% by weight of the phosphate cement material.
  • the dihydrogen phosphate salt is at least one of potassium dihydrogen phosphate, sodium dihydrogen phosphate and ammonium dihydrogen phosphate
  • the inorganic mineral filler is fly ash, wollastonite powder, blast furnace.
  • At least one of slag powder, steel slag powder, kaolin, metakaolin, zeolite, the retarder is at least one of borax and boric acid;
  • magnesia is calcined magnesia, fused magnesia and seawater magnesia
  • At least one of the calcined magnesia, fused magnesia or seawater magnesia has a magnesia content of not less than 80%.
  • steps (4) and (5) are repeated to obtain an adhesive-fiber sheet reinforcing material layer of a multilayer fiber sheet.
  • the organic resin accounts for 10-30% by weight in the adhesive, and the inorganic adhesive accounts for 70-90%.
  • the method for reinforcing and protecting concrete of the fiber composite material of the invention improves the flexural strength and impact toughness of the concrete, and the adhesive-fiber sheet reinforcing material layer blocks the penetration of the external corrosive medium into the concrete, and complements the internal material of the concrete structure. Strong and protective effect can extend the service life of concrete.
  • the adhesive-fiber sheet reinforced material layer has good high temperature resistance, long life, safety and environmental protection, and is close to the elastic modulus of the concrete material, and has good coordination of deformation and good compatibility.
  • the fiber composite reinforced concrete structure of the invention has simple construction, is convenient for popularization and application in engineering construction and reinforcement, and has good economic benefits.
  • FIG. 1 is a schematic cross-sectional view showing a reinforcing structure of a concrete fiber composite material using a 1-layer fiber sheet according to an embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional view showing a reinforcing structure of a concrete fiber composite material using two layers of fiber sheets according to an embodiment of the present invention
  • the method for reinforcing and protecting concrete of the fiber composite material of the invention, the adhesive-fiber sheet reinforcing material layer is pasted on the surface of the concrete member, and the construction comprises the following steps:
  • steps (4) and (5) are repeated.
  • the fiber composite reinforcing layer is an adhesive-fiber sheet reinforcing material layer, and the fiber sheet layer is sandwiched in the adhesive, which may be one or more layers, and the adhesive-fiber sheet reinforcing material layer is pasted on the surface of the concrete;
  • the adhesive is inorganic
  • the adhesive and the organic adhesive are uniformly mixed, wherein the inorganic adhesive is formed by mixing an inorganic cementing material and water, and the organic resin is one of unsaturated polyester, epoxy resin, phenolic resin, silicone rubber;
  • the organic resin accounts for 10-30% in the adhesive, and the inorganic adhesive accounts for 70-90%.
  • the fibrous sheet may be a unidirectional fibrous layer or a fibrous fabric layer.
  • the fiber is a combination of one or more of glass fiber, carbon fiber, basalt fiber or aramid fiber.
  • the inorganic adhesive is a phosphate adhesive, wherein the phosphate adhesive consists of the following components by weight:
  • the dihydrogen phosphate is at least one of potassium dihydrogen phosphate, sodium dihydrogen phosphate and ammonium dihydrogen phosphate
  • the inorganic mineral filler is fly ash, wollastonite powder, blast furnace slag powder, steel slag powder, kaolin, metakaolin
  • the retarder is at least one of borax and boric acid
  • the magnesia is at least one of calcined magnesia, fused magnesia and seawater magnesia, and calcined magnesia and electrofusion
  • the magnesia content in magnesia or seawater magnesia is not less than 80%.
  • the retarder weight is 8%-15% by weight of the magnesia; the weight of the water is 18-25% by weight of the phosphate cement material.
  • a sample of the C40 cement concrete beam is prepared, and the size is 100 mm ⁇ 100 mm ⁇ 550 m. After the concrete sample solidified and hardened and cured under standard conditions for 28 days, the surface was ground and chiseled.
  • the two components of the epoxy resin A and B are prepared in a ratio of 1:2 parts by weight, and mixed for use.
  • the inorganic binder is formed by mixing and stirring the powdered phosphate cement material with water.
  • the parts by weight of the powdery phosphate cementing material in this embodiment are potassium dihydrogen phosphate 100, magnesia 65, Fly ash 55, borax 4.
  • the weight of water is 55.
  • the preparation method of the phosphate adhesive is to weigh and mix the powdery raw materials in proportion, and stir them evenly in a mixer to obtain a desired inorganic adhesive.
  • the epoxy resin glue and the phosphate adhesive are mixed, and the weight ratio of the mixture is 10 parts by mass of the epoxy resin and 90 parts by weight of the phosphate adhesive to prepare an organic-inorganic hybrid adhesive.
  • the fiber material is pasted, and the organic-inorganic adhesive is quickly applied to the upper surface of the concrete beam with a clean shovel, and the thickness is about 1 to 1.5 mm.
  • the unidirectional carbon fiber sheet is flatly pasted on the adhesive; compacted and vented. Then, a layer of adhesive is evenly spread on the unidirectional continuous carbon fiber, and the thickness is about 1 to 1.5 mm, compacted and exhausted, and after being hardened, it is trimmed to obtain a concrete beam with a surface-bonded fiber composite material. .
  • the fiber sheet used in Example 1 was one layer. Repeat the above steps if you need to paste multiple layers.
  • the four-point bending strength was tested on a material testing machine (NYL-300 type), and each of the three concrete beams was a group, and the average bending strength of the three concrete beams was obtained.
  • the four-point bending strength of the blank concrete beam is 10.68 MPa.
  • the concrete beam bonded by the reinforcing layer composed of one layer of unidirectional continuous carbon fiber and organic-inorganic adhesive has an increase in bending strength compared with the blank concrete beam. %.
  • a fiber composite reinforcement layer was prepared on a concrete beam having a surface treated with a chisel.
  • the material weight component of the powdered phosphate cement material is potassium dihydrogen phosphate 100, magnesia 70, Fly ash 50, borax 6.
  • the weight fraction of water is 40.
  • the weight ratio of the epoxy resin to the phosphate adhesive is 20 parts by mass of the epoxy resin and 80 parts by weight of the phosphate adhesive.
  • the unidirectional continuous carbon fiber sheet is one layer.
  • the four-point bending strength was tested on a material testing machine (NYL-300 type), and the present embodiment was composed of one layer of unidirectional continuous carbon fiber and an organic-inorganic adhesive.
  • the reinforced layer of the reinforced concrete beam has an 87% increase in flexural strength compared to the blank concrete beam.
  • a fiber composite reinforcement layer was prepared on a concrete beam having a surface treated with a chisel.
  • the material weight component of the powdered phosphate cement material is potassium dihydrogen phosphate 100, magnesia 75, Fly ash 40, borax 13.
  • the weight of water is 45.
  • the organic-inorganic adhesive contains 30 parts of epoxy resin and 70 parts of phosphate adhesive.
  • the weight ratio of the epoxy resin to the phosphate adhesive is 30 parts by mass of the epoxy resin and 70 parts by weight of the phosphate adhesive.
  • the unidirectional continuous carbon fiber sheet is one layer.
  • a fiber composite reinforcing layer was prepared on a concrete beam whose surface was subjected to chiseling.
  • the material weight component of the powdered phosphate cement material is potassium dihydrogen phosphate 100, magnesia 68, Fly ash 20, borax 5.
  • the weight of water is 45.
  • the organic-inorganic adhesive contains 25 parts of epoxy resin and 75 parts of phosphate adhesive.
  • the weight ratio of the epoxy resin to the phosphate adhesive is 20 parts by mass of the epoxy resin and 80 parts by weight of the phosphate adhesive.
  • the unidirectional continuous carbon fiber sheet is one layer.
  • a fiber composite reinforcing layer was prepared on a concrete beam whose surface was subjected to chiseling.
  • the material weight component of the powdered phosphate cement material is potassium dihydrogen phosphate 100, magnesia 70, Fly ash 30, borax 8.
  • the weight fraction of water is 50.
  • the organic-inorganic adhesives 28 were epoxy resins and 72 were phosphate binders.
  • the unidirectional continuous carbon fiber sheet is one layer.
  • a fiber composite reinforcing layer was prepared on a concrete beam whose surface was subjected to chiseling.
  • the material weight component of the powdered phosphate cement material is potassium dihydrogen phosphate 100, magnesia 60, Fly ash 20, borax 6.
  • the weight fraction of water is 40.
  • the organic-inorganic adhesive contains 30 parts of epoxy resin and 70 parts of phosphate adhesive.
  • the unidirectional continuous carbon fiber sheet is one layer.
  • the four-point bending strength was tested on a material testing machine (NYL-300 type), and the present embodiment was composed of one layer of unidirectional continuous carbon fiber and an organic-inorganic adhesive.
  • the concrete beam of the reinforced layer is increased by 110% compared with the blank concrete beam.
  • the adhesive may be hand lay-up or mechanically sprayed depending on the needs of the field
  • the fibrous sheet may be a plurality of layers
  • the surface of the fibrous material may be modified, etc., and are considered to be within the concept of the present invention.

Abstract

L'invention porte sur un procédé pour renforcer et protéger du béton à l'aide d'un matériau composite à fibres. Une couche de matériau de renfort en feuille à fibres adhésive est amenée à adhérer à la surface d'un élément en béton, le procédé comprenant les étapes suivantes : (1) la surface d'un élément en béton est rendue rugueuse ; (2) un adhésif minéral est mélangé à une résine organique de façon à former un adhésif, (3) une couche de l'adhésif est appliquée à la surface de l'élément en béton traité ; (4) une feuille de fibres est amenée à adhérer à l'adhésif ; (5) après que la feuille de fibres a été dallée et compactée, une couche de l'adhésif est appliquée à la surface externe de la feuille de fibres. Le présent procédé accroît la résistance à la flexion et la dureté à l'impact du béton, renforce et protège des matériaux internes de structures en béton, et peut prolonger la durée de vie du béton. La couche de matériau de renfort a une bonne résistance aux températures élevées et une longue durée de vie. La couche de matériau de renfort est également sûre et écologique. La présente invention est de structure simple, elle peut être appliquée facilement à la construction et/ou au renforcement, et elle a des avantages économiques positifs.
PCT/CN2014/087180 2013-12-13 2014-09-23 Procédé pour renforcer et protéger du béton à l'aide d'un matériau composite à fibres WO2015085807A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310684937.0A CN103738000B (zh) 2013-12-13 2013-12-13 纤维复合材料补强和保护混凝土的方法
CN201310684937.0 2013-12-13

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WO2015085807A1 true WO2015085807A1 (fr) 2015-06-18

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CN (1) CN103738000B (fr)
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN110376033A (zh) * 2019-07-10 2019-10-25 东北石油大学 一种高强度缝洞型岩心及其制作方法
CN114685113A (zh) * 2020-12-29 2022-07-01 孙泉水 一种高强度清水混凝土表面维护方法
CN114686138A (zh) * 2022-05-07 2022-07-01 河北工业大学 一种磷酸镁水泥基电磁吸波混凝土帆布

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CN103738000B (zh) * 2013-12-13 2016-06-01 深圳大学 纤维复合材料补强和保护混凝土的方法
CN103786382B (zh) * 2013-12-13 2016-09-14 深圳大学 无机胶纤维复合材料补强和保护混凝土的方法
CN104228184B (zh) * 2014-09-19 2015-12-02 深圳大学 一种磷酸盐基纤维复合材料及其制备方法

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CN102199951A (zh) * 2011-01-31 2011-09-28 云南巨和建设集团有限公司 使用碳纤维加固混凝土结构的施工方法
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CN103738000A (zh) * 2013-12-13 2014-04-23 深圳大学 纤维复合材料补强和保护混凝土的方法
CN103786382A (zh) * 2013-12-13 2014-05-14 深圳大学 无机胶纤维复合材料补强和保护混凝土的方法

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CN102199951A (zh) * 2011-01-31 2011-09-28 云南巨和建设集团有限公司 使用碳纤维加固混凝土结构的施工方法
CN102617059A (zh) * 2012-03-23 2012-08-01 深圳大学 磷酸盐基胶结料
CN103738000A (zh) * 2013-12-13 2014-04-23 深圳大学 纤维复合材料补强和保护混凝土的方法
CN103786382A (zh) * 2013-12-13 2014-05-14 深圳大学 无机胶纤维复合材料补强和保护混凝土的方法

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Publication number Priority date Publication date Assignee Title
CN110376033A (zh) * 2019-07-10 2019-10-25 东北石油大学 一种高强度缝洞型岩心及其制作方法
CN110376033B (zh) * 2019-07-10 2022-09-02 东北石油大学 一种高强度缝洞型岩心及其制作方法
CN114685113A (zh) * 2020-12-29 2022-07-01 孙泉水 一种高强度清水混凝土表面维护方法
CN114685113B (zh) * 2020-12-29 2023-01-03 孙泉水 一种高强度清水混凝土表面维护方法
CN114686138A (zh) * 2022-05-07 2022-07-01 河北工业大学 一种磷酸镁水泥基电磁吸波混凝土帆布

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