WO2015085807A1 - Method for reinforcing and protecting concrete using fiber composite material - Google Patents

Method for reinforcing and protecting concrete using fiber composite material 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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adhesive
concrete
layer
magnesia
weight
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PCT/CN2014/087180
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French (fr)
Chinese (zh)
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丁铸
李伟文
隋莉莉
李大望
董必钦
邢锋
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深圳大学
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Priority to CN201310684937.0A priority Critical patent/CN103738000B/en
Priority to CN201310684937.0 priority
Application filed by 深圳大学 filed Critical 深圳大学
Publication of WO2015085807A1 publication Critical patent/WO2015085807A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/14Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/02Coating on the layer surface on fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/26Polymeric coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0261Polyamide fibres
    • B32B2262/0269Aromatic polyamide fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/101Glass fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10Inorganic fibres
    • B32B2262/106Carbon fibres, e.g. graphite fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/30Properties of the layers or laminate having particular thermal properties
    • B32B2307/306Resistant to heat
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546Flexural strength; Flexion stiffness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/50Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558Impact strength, toughness

Abstract

A method for reinforcing and protecting concrete using a fiber composite material. An adhesive-fiber sheet reinforcing material layer is adhered to the surface of a concrete member, comprising the following steps: (1) the surface of a concrete member is roughened; (2) an inorganic adhesive is mixed with an organic resin to form an adhesive; (3) a layer of the adhesive is applied to the surface of the treated concrete member; (4) a fiber sheet is adhered to the adhesive; (5) after the fiber sheet has been paved and compacted, a layer of the adhesive is applied to the outer surface of the fiber sheet. The present method increases the flexural strength and impact toughness of concrete, reinforces and protects internal materials of concrete structures, and can extend the service life of concrete. The reinforcing material layer has good high-temperature resistance and a long lifespan. The reinforcing material layer is also safe and environmentally friendly. The present invention is simple in structure, can be easily applied to construction and reinforcement, and has positive economic benefits.

Description

纤维复合材料补强和保护混凝土的方法  Method for reinforcing and protecting concrete by fiber composite material 技术领域Technical field
本发明涉及混凝土补强,尤其涉及一种纤维复合材料补强和保护混凝土的方法。 The invention relates to concrete reinforcement, in particular to a method for reinforcing and protecting concrete by fiber composite material.
背景技术Background technique
混凝土的耐久性已成为建筑结构的重要问题,大量的混凝土由于结构劣化需要修复、加固、补强而耗费巨大的资金。混凝土结构在服役过程中由于受到荷载与各种环境腐蚀介质共同作用,而逐渐发生结构劣化,导致出现裂纹,裂缝,甚至破坏,从而降低混凝土结构物的安全性,缩短使用寿命。为了及时修复劣化的混凝土结构,保证其使用的安全性,延长其使用寿命,必须对劣化的混凝土进行修复和补强。目前,混凝土的加固补强多采用表面粘贴纤维增强复合材料,例如碳纤维布与环氧有机胶构成的纤维增强复合材料(CFRP)。CFRP具有高强、高效、质轻和施工方便的优点而得到广泛应用,形成了比较成熟的技术体系,我国还制定了《混凝土结构加固设计规范》(GB 50367-2006)和《结构加固修复用碳纤维片材》(GB/T 21490-2008)。但粘贴用的环氧类有机胶有如下缺陷,(1)软化温度较低,一般多为60~80℃,在高温和火灾下会挥发出有毒气体,环氧基会与人体内的多种基团反应,因此通常被认为是有毒或者致癌物质,这给人们的生命财产安全带来极大的威胁;(2)在紫外线的照射下会加速老化,严重影响粘结性能;(3)与无机类的混凝土材料的弹性模量差距大,在多次热胀冷缩和湿胀干缩循环条件下,两者的变形不协调,易产生裂缝,因而相容性差。针对这类问题,中国发明专利申请(CN 102351443 A, CN201210356357)公开了耐高温碱矿渣胶凝材料及其制备方法,可在一定程度上解决环氧类有机胶不耐高温的问题,但因其施工方法比较繁琐,不利于工程实际中的推广应用。 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. During the service process, 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. In order to repair the deteriorated concrete structure in time, to ensure the safety of its use and to prolong its service life, it is necessary to repair and reinforce the deteriorated concrete. At present, 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). However, 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. The group reacts, so it is usually considered to be toxic or carcinogenic, which poses a great threat to the safety of people's lives and property; (2) it accelerates aging under ultraviolet light and seriously affects the bonding performance; (3) 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. 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.
技术问题technical problem
本发明要解决的技术问题是提供一种安全、环保、寿命长、且施工简便的纤维复合材料补强和保护混凝土的方法。 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.
技术解决方案Technical solution
为了解决上述技术问题,本发明采用的技术方案是,一种纤维复合材料补强和保护混凝土的方法,在混凝土构件表面粘贴胶粘剂-纤维片材增强材料层,施工包括以下步骤:In order to solve the above technical problems, 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:
(1)对混凝土构件表面进行粗糙处理;(1) roughening the surface of the concrete member;
(2)将无机胶凝材料与水混合、搅拌均匀形成无机胶粘剂;将无机胶粘剂与有机树脂混合制成胶粘剂;(2) mixing the inorganic cementing material with water and stirring to form an inorganic adhesive; mixing the inorganic adhesive with the organic resin to form an adhesive;
(3)在处理好的混凝土构件表面涂抹一层胶粘剂;(3) Applying a layer of adhesive to the surface of the treated concrete member;
(4)将纤维片材粘贴在的胶粘剂上; (4) attaching the fiber sheet to the adhesive;
(5)将纤维片材铺平、压实、排气后再在纤维片材外表面涂刷一层胶粘剂。(5) After the fiber sheet is flattened, compacted, and vented, a layer of adhesive is applied to the outer surface of the fiber sheet.
以上所述的方法,所述的纤维片材为单向纤维层或者纤维织物层;所述的有机树脂是不饱和聚脂、环氧树脂、酚醛树脂、硅酮胶中的一种;所述的无机胶粘剂是磷酸盐胶凝材料与水的混合物。In the above method, 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.
以上所述的方法,所述的纤维为玻璃纤维、碳纤维、玄武岩纤维或芳纶纤维中的一种或多种的组合。In the above method, the fiber is a combination of one or more of glass fiber, carbon fiber, basalt fiber or aramid fiber.
以上所述的方法,无机胶粘剂是磷酸盐胶粘剂,磷酸盐胶粘剂按重量份,由以下组分组成:In the above method, the inorganic adhesive is a phosphate adhesive, and the phosphate adhesive consists of the following components by weight:
磷酸二氢盐 100;Dihydrogen phosphate 100;
镁砂 60-80;Magnesia sand 60-80;
无机矿物填料 0-60;Inorganic mineral filler 0-60;
缓凝剂 4-15;Retarder 4-15;
水 35-55。Water 35-55.
以上所述的方法,磷酸盐胶粘剂按重量份,由以下组分组成:In the above method, the phosphate adhesive consists of the following components in parts by weight:
磷酸二氢盐 100;Dihydrogen phosphate 100;
镁砂 65-75;Magnesia sand 65-75;
无机矿物填料 20-50;Inorganic mineral filler 20-50;
缓凝剂 5-12;Retarder 5-12;
水 35-55。Water 35-55.
以上所述的方法,所述的缓凝剂重量为镁砂重量的8%-15%;水的重量为磷酸盐胶凝材料重量百分比的18-25%。In the above method, 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.
以上所述的方法,所述的磷酸二氢盐为磷酸二氢钾、磷酸二氢钠及磷酸二氢铵中的至少一种,所述的无机矿物填料是粉煤灰、硅灰石粉、高炉矿渣粉、钢渣粉、高岭土、偏高岭土、沸石中的至少一种,所述的缓凝剂是硼砂和硼酸中的至少一种;镁砂为重烧镁砂、电熔镁砂和海水镁砂中的至少一种,重烧镁砂、电熔镁砂或海水镁砂中的镁砂含量不小于80%。In the above method, the dihydrogen phosphate salt is at least one of potassium dihydrogen phosphate, sodium dihydrogen phosphate and ammonium dihydrogen phosphate, and 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%.
以上所述的方法,重复步骤(4)和(5),获得多层纤维片材的胶粘剂-纤维片材增强材料层。In the above-described method, steps (4) and (5) are repeated to obtain an adhesive-fiber sheet reinforcing material layer of a multilayer fiber sheet.
以上所述的方法,按重量百分比,在粘剂中有机树脂占10-30%,无机胶粘剂占70-90%。In the above method, the organic resin accounts for 10-30% by weight in the adhesive, and the inorganic adhesive accounts for 70-90%.
有益效果Beneficial effect
本发明纤维复合材料补强和保护混凝土的方法提高了混凝土的抗折强度和冲击韧性,胶粘剂-纤维片材增强材料层阻隔了外界腐蚀介质对混凝土的渗透,对混凝土结构的内部材料起到补强和保护作用,可以延长混凝土的使用寿命。胶粘剂-纤维片材增强材料层耐高温性能好,寿命长、安全、环保,与混凝土材料的弹性模量接近,变形的协调性好,具有较好的相容性。本发明纤维复合材料补强混凝土结构施工简便,便于在工程建设和加固中推广应用,具有良好的经济效益。 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.
附图说明DRAWINGS
下面结合附图和具体实施方式对本发明作进一步详细的说明。The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
图1是本发明实施例混凝土纤维复合材料补强结构使用1层纤维片材时的剖面示意图;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;
图2是本发明实施例混凝土纤维复合材料补强结构使用2层纤维片材时的剖面示意图;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;
图中:3-混凝土构件,2-混合胶粘剂,1-纤维片材。 In the figure: 3- concrete member, 2-mixed adhesive, 1-fiber sheet.
本发明的实施方式Embodiments of the invention
本发明纤维复合材料补强和保护混凝土的方法,在混凝土构件表面粘贴胶粘剂-纤维片材增强材料层,施工包括以下步骤: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:
(1)对混凝土的表面进行粗糙、凿毛处理;(1) roughening and chiseling the surface of concrete;
(2)配制无机胶粘剂与有机胶粘剂的混合物,其中,无机胶粘剂是有磷酸盐胶凝材料与水混合、搅拌均匀形成;(2) preparing a mixture of an inorganic adhesive and an organic adhesive, wherein the inorganic adhesive is formed by mixing a phosphate cement material with water and stirring uniformly;
(3)在处理好的混凝土表面均匀涂抹一层混合胶粘剂;(3) uniformly apply a layer of mixed adhesive on the surface of the treated concrete;
(4)将纤维片材平整地粘贴在的混合胶粘剂上; (4) affixing the fiber sheet to the mixed adhesive on the flat surface;
(5)将纤维片材铺平、压实、排气后再在纤维片材外表面涂刷一层混合胶粘剂;(5) After the fiber sheet is flattened, compacted, and vented, a layer of mixed adhesive is applied to the outer surface of the fiber sheet;
(6)如果采用多层纤维片材的增强材料层,则重复步骤(4)和(5)。(6) If the reinforcing material layer of the multilayer fiber sheet is used, steps (4) and (5) are repeated.
纤维复合材料增强层为胶粘剂-纤维片材增强材料层,纤维片材层夹在胶粘剂中,可以是一层或多层,胶粘剂-纤维片材增强材料层粘贴在混凝土的表面上;胶粘剂由无机胶粘剂和有机胶粘剂混合均匀而成,其中无机胶粘剂由无机胶凝材料与水混合而成,有机树脂是不饱和聚脂、环氧树脂、酚醛树脂、硅酮胶中的一种;按重量百分比,在粘剂中有机树脂占10-30%,无机胶粘剂占70-90%。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%.
纤维片材可以是单向纤维层或者纤维织物层。纤维为玻璃纤维、碳纤维、玄武岩纤维或芳纶纤维中的一种或多种的组合。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.
无机胶粘剂为磷酸盐胶粘剂,其中,磷酸盐胶粘剂按重量份,由以下组分组成:The inorganic adhesive is a phosphate adhesive, wherein the phosphate adhesive consists of the following components by weight:
磷酸二氢盐 100;Dihydrogen phosphate 100;
镁砂 60-80;Magnesia sand 60-80;
无机矿物填料 0-60;Inorganic mineral filler 0-60;
缓凝剂 3-15;Retarder 3-15;
水 35-55。Water 35-55.
其中,磷酸二氢盐可磷酸二氢钾、磷酸二氢钠及磷酸二氢铵中的至少一种,无机矿物填料是粉煤灰、硅灰石粉、高炉矿渣粉、钢渣粉、高岭土、偏高岭土、沸石中的至少一种,缓凝剂是硼砂和硼酸中的至少一种;镁砂为重烧镁砂、电熔镁砂和海水镁砂中的至少一种,重烧镁砂、电熔镁砂或海水镁砂中的镁砂含量不小于80%。Wherein the dihydrogen phosphate is at least one of potassium dihydrogen phosphate, sodium dihydrogen phosphate and ammonium dihydrogen phosphate, and the inorganic mineral filler is fly ash, wollastonite powder, blast furnace slag powder, steel slag powder, kaolin, metakaolin And at least one of the zeolite, 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%.
磷酸盐胶粘剂中,缓凝剂重量为镁砂重量的8%-15%;水的重量为磷酸盐胶凝材料重量百分比的18-25%。In the phosphate adhesive, 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.
表1:实施例1-9磷酸盐胶粘剂的配比表Table 1: Formulation Table of Example 1-9 Phosphate Adhesives
(重量份) (parts by weight) 磷酸二氢钾 Potassium dihydrogen phosphate 镁砂 Magnesia 粉煤灰 Fly ash 硼砂 Borax  water
实施例1 Example 1 100 100 65 65 55 55 4 4 55 55
实施例2 Example 2 100 100 70 70 50 50 6 6 40 40
实施例3 Example 3 100 100 75 75 40 40 13 13 45 45
实施例4 Example 4 100 100 80 80 50 50 15 15 55 55
实施例5 Example 5 100 100 80 80 0 0 12 12 35 35
实施例6 Example 6 100 100 75 75 10 10 8 8 40 40
实施例7 Example 7 100 100 68 68 20 20 5 5 45 45
实施例8 Example 8 100 100 70 70 30 30 8 8 50 50
实施例9 Example 9 100 100 60 60 20 20 6 6 40 40
实施例1Example 1
本发明实施例1纤维复合材料补强和保护水泥混凝土的方法,制备C40水泥混凝土梁试样,尺寸为100mm×100mm×550m。在混凝土试样凝固硬化、并在标准条件下养护28天后,对其表面进行打磨和凿毛处理。In the method of reinforcing and protecting cement concrete of the fiber composite material of the embodiment 1 of the invention, 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.
纤维材料采用南京海拓复合材料有限责任公司的碳纤维HITEX-C200,其性能见表1。The fiber material adopts the carbon fiber HITEX-C200 of Nanjing Haituo Composite Materials Co., Ltd., and its performance is shown in Table 1.
表1: 碳纤维性能表Table 1: Carbon Fiber Performance Table
单位面积质量 (g/m2Mass per unit area (g/m 2 ) 抗拉强度标准值
(MPa)
Tensile strength standard value (MPa)
受拉弹性模量
(MPa)
Tensile modulus of elasticity (MPa)
伸长率
(%)
Elongation(%)
≤200 ≤200 ≥3400 ≥3400 ≥2.4×105 ≥2.4×10 5 ≥1.7 ≥1.7
制备胶粘剂。有机胶粘剂的制备时将环氧树脂A、B的两组份按照1:2重量份数配制、拌匀备用。无机胶粘剂由粉状磷酸盐胶凝材料与水混和、搅拌均匀而成。Preparation of the adhesive. In the preparation of the organic adhesive, 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.
本实施例中的粉状磷酸盐胶凝材料的重量份为,磷酸二氢钾100、镁砂65、 粉煤灰55、硼砂4。水的重量份数为55。磷酸盐胶粘剂的制备方法是将粉状的原材料按比例称量、混合,在搅拌机中搅拌均匀,得到所需的无机胶粘剂。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.
将环氧树脂胶和磷酸盐胶粘剂混合,混合的重量比例是环氧树脂质量份数为10份,磷酸盐胶粘剂为90份,制成有机-无机混合胶粘剂。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.
粘贴纤维材料,用干净的铲子迅速的将有机-无机胶粘剂均匀的涂抹在混凝土梁的上表面,厚度约为1~1.5mm。并将单向碳纤维片材平整地粘贴在胶粘剂上;压实、排气。再在单向连续碳纤维上均匀铺摊一层胶粘剂,厚度约为1~1.5mm,压实、排气,待其硬化后,对其进行修边处理,可得到表面粘贴纤维复合材料的混凝土梁。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. .
实施例1使用的纤维片材为1层。如需要粘贴多层,可重复上述步骤。The fiber sheet used in Example 1 was one layer. Repeat the above steps if you need to paste multiple layers.
粘贴纤维复合材料时,在混凝土梁的两端各留出50mm的长度,以保证加载时,两端的固定约束不会对纤维布产生约束效果。When the fiber composite material is pasted, a length of 50 mm is left at both ends of the concrete beam to ensure that the fixed constraint at both ends does not have a restraining effect on the fiber cloth during loading.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,每三根混凝土梁为一组,三根混凝土梁的平均抗弯强度为该组的抗弯强度。空白混凝土梁的四点抗弯强度为10.68MPa,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了85%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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. For the bending strength of the group. The four-point bending strength of the blank concrete beam is 10.68 MPa. In this embodiment, 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. %.
实施例2Example 2
按照实施例1所述的材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。所述的粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂70、 粉煤灰50、硼砂6。水的重量份数为40。环氧树脂胶和磷酸盐胶粘剂混合的重量比例是环氧树脂质量份数为20份,磷酸盐胶粘剂为80份。单向连续碳纤维片材为1层。According to the materials and methods described in Example 1, 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.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了87%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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.
实施例3Example 3
按照实施例1所述的材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂75、 粉煤灰40、硼砂13。水的重量份数为45。有机-无机胶粘剂中环氧树脂占30份,磷酸盐胶粘剂占70份。环氧树脂胶和磷酸盐胶粘剂混合的重量比例是环氧树脂质量份数为30份,磷酸盐胶粘剂为70份。单向连续碳纤维片材为1层。According to the materials and methods described in Example 1, 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.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了105%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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 105% compared with the blank concrete beam.
实施例4Example 4
按照实施例1材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂80、 粉煤灰50、硼砂15。水的重量份数为55。有机-无机胶粘剂中环氧树脂占15份,磷酸盐胶粘剂占85份。环氧树脂胶和磷酸盐胶粘剂混合的重量比例是环氧树脂质量份数为25份,磷酸盐胶粘剂为75份单向连续碳纤维片材为1层。According to the material and method of Example 1, 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 80, Fly ash 50, borax 15. The weight of water is 55. The organic-inorganic adhesive contains 15 parts of epoxy resin and 85 parts of phosphate adhesive. The weight ratio of the epoxy resin to the phosphate adhesive is 25 parts by mass of the epoxy resin, and the phosphate adhesive is 75 parts of the unidirectional continuous carbon fiber sheet.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了102%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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 concrete beam has a flexural strength that is increased by 102% compared to the blank concrete beam.
实施例5Example 5
按照实施例1材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂80、硼砂12。水的重量份数为35。有机-无机胶粘剂中环氧树脂占18份,磷酸盐胶粘剂占82份。环氧树脂胶和磷酸盐胶粘剂混合的重量比例是环氧树脂质量份数为15份,磷酸盐胶粘剂为85份,单向连续碳纤维片材为1层。According to the material and method of Example 1, 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 80, and borax 12. The weight fraction of water is 35. Among the organic-inorganic adhesives, 18 were epoxy resins and 82 were phosphate binders. The weight ratio of the epoxy resin to the phosphate adhesive is 15 parts by mass of the epoxy resin, 85 parts by weight of the phosphate adhesive, and 1 layer of the unidirectional continuous carbon fiber sheet.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了96%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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 concrete beam has a flexural strength that is increased by 96% compared to the blank concrete beam.
实施例6Example 6
按照实施例1材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂75、 粉煤灰10、硼砂8。水的重量份数为40。有机-无机胶粘剂中环氧树脂占22份,磷酸盐胶粘剂占78份。环氧树脂胶和磷酸盐胶粘剂混合的重量比例是环氧树脂质量份数为20份,磷酸盐胶粘剂为80份单向连续碳纤维片材为1层。According to the material and method of Example 1, 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 75, Fly ash 10, borax 8. The weight fraction of water is 40. The organic-inorganic adhesive contained 22 parts of epoxy resin and 78 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 the phosphate adhesive is 80 parts of the unidirectional continuous carbon fiber sheet.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了95%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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 concrete beam has a flexural strength that is increased by 95% compared to the blank concrete beam.
实施例7Example 7
按照实施例1材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂68、 粉煤灰20、硼砂5。水的重量份数为45。有机-无机胶粘剂中环氧树脂占25份,磷酸盐胶粘剂占75份。环氧树脂胶和磷酸盐胶粘剂混合的重量比例是环氧树脂质量份数为20份,磷酸盐胶粘剂为80份。单向连续碳纤维片材为1层。According to the material and method of Example 1, 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.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了98%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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 98% compared with the blank concrete beam.
实施例8Example 8
按照实施例1材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂70、 粉煤灰30、硼砂8。水的重量份数为50。有机-无机胶粘剂中环氧树脂占28份,磷酸盐胶粘剂占72份。单向连续碳纤维片材为1层。According to the material and method of Example 1, 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. Among the organic-inorganic adhesives, 28 were epoxy resins and 72 were phosphate binders. The unidirectional continuous carbon fiber sheet is one layer.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了100%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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 100% compared with the blank concrete beam.
实施例9Example 9
按照实施例1材料与方法,在表面经过凿毛处理的混凝土梁上制备纤维复合材料增强层。粉状磷酸盐胶凝材料的材料重量组成份数是磷酸二氢钾100、镁砂60、 粉煤灰20、硼砂6。水的重量份数为40。有机-无机胶粘剂中环氧树脂占30份,磷酸盐胶粘剂占70份。单向连续碳纤维片材为1层。According to the material and method of Example 1, 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.
本实施例的混凝土试件在室温条件下固化7天后,在材料实验机(NYL-300型)上测试其四点抗弯强度,本实施例使用1层单向连续碳纤维与有机-无机胶粘剂组成的增强层粘贴的混凝土梁,其抗弯强度与空白混凝土梁相比增加了110%。After the concrete specimen of the present embodiment was cured at room temperature for 7 days, 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.
本发明的实施方式不限于上述的实施例。例如,胶粘剂可根据现场情况的需要选用手糊或机械喷涂,纤维片材可以是多层,纤维材料表面可以改性等,都被视为是本发明的构思之内。Embodiments of the invention are not limited to the embodiments described above. For example, 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.

Claims (9)

  1. 一种纤维复合材料补强和保护混凝土的方法,其特征在于,在混凝土构件表面粘贴胶粘剂-纤维片材增强材料层,施工包括以下步骤: A method for reinforcing and protecting concrete by a fiber composite material, characterized in that an adhesive-fiber sheet reinforcing material layer is adhered to a surface of a concrete member, and the construction comprises the following steps:
    (1)对混凝土构件表面进行粗糙处理;(1) roughening the surface of the concrete member;
    (2)将无机胶凝材料与水混合、搅拌均匀形成无机胶粘剂;将无机胶粘剂与有机树脂混合制成胶粘剂;(2) mixing the inorganic cementing material with water and stirring to form an inorganic adhesive; mixing the inorganic adhesive with the organic resin to form an adhesive;
    (3)在处理好的混凝土构件表面涂抹一层胶粘剂;(3) Applying a layer of adhesive to the surface of the treated concrete member;
    (4)将纤维片材粘贴在的胶粘剂上; (4) attaching the fiber sheet to the adhesive;
    (5)将纤维片材铺平、压实、排气后再在纤维片材外表面涂刷一层胶粘剂。(5) After the fiber sheet is flattened, compacted, and vented, a layer of adhesive is applied to the outer surface of the fiber sheet.
  2. 根据权利要求1所述的方法,其特征在于,所述的纤维片材为单向纤维层或者纤维织物层;所述的有机树脂是不饱和聚脂、环氧树脂、酚醛树脂、硅酮胶中的一种;所述的无机胶粘剂是磷酸盐胶凝材料与水的混合物。The method according to claim 1, wherein said fiber sheet is a unidirectional fiber layer or a fiber fabric layer; said organic resin is unsaturated polyester, epoxy resin, phenolic resin, silicone glue One of the inorganic binders is a mixture of a phosphate cementitious material and water.
  3. 根据权利要求1所述的方法,其特征在于,所述的纤维为玻璃纤维、碳纤维、玄武岩纤维或芳纶纤维中的一种或多种的组合。The method of claim 1 wherein said fibers are a combination of one or more of glass fibers, carbon fibers, basalt fibers or aramid fibers.
  4. 根据权利要求2所述的方法,其特征在于,无机胶粘剂是磷酸盐胶粘剂,磷酸盐胶粘剂按重量份,由以下组分组成:The method according to claim 2, wherein the inorganic binder is a phosphate binder, and the phosphate binder comprises, by weight, the following components:
    磷酸二氢盐 100;Dihydrogen phosphate 100;
    镁砂 60-80;Magnesia sand 60-80;
    无机矿物填料 0-60;Inorganic mineral filler 0-60;
    缓凝剂 4-15;Retarder 4-15;
    水 35-55。Water 35-55.
  5. 根据权利要求4所述的方法,其特征在于,磷酸盐胶粘剂按重量份,由以下组分组成:The method according to claim 4, wherein the phosphate binder consists of the following components in parts by weight:
    磷酸二氢盐 100;Dihydrogen phosphate 100;
    镁砂 65-75;Magnesia sand 65-75;
    无机矿物填料 20-50;Inorganic mineral filler 20-50;
    缓凝剂 5-12;Retarder 5-12;
    水 35-55。Water 35-55.
  6. 根据权利要求4所述的方法,其特征在于,所述的缓凝剂重量为镁砂重量的8%-15%;水的重量为磷酸盐胶凝材料重量百分比的18-25%。The method of claim 4 wherein said retarder weight is from 8% to 15% by weight of the magnesia; and the weight of water is from 18% to 25% by weight of the phosphate cementitious material.
  7. 根据权利要求4所述的方法,其特征在于,所述的磷酸二氢盐为磷酸二氢钾、磷酸二氢钠及磷酸二氢铵中的至少一种,所述的无机矿物填料是粉煤灰、硅灰石粉、高炉矿渣粉、钢渣粉、高岭土、偏高岭土、沸石中的至少一种,所述的缓凝剂是硼砂和硼酸中的至少一种;镁砂为重烧镁砂、电熔镁砂和海水镁砂中的至少一种,重烧镁砂、电熔镁砂或海水镁砂中的镁砂含量不小于80%。The method according to claim 4, wherein the dihydrogen phosphate salt is at least one of potassium dihydrogen phosphate, sodium dihydrogen phosphate and ammonium dihydrogen phosphate, and the inorganic mineral filler is pulverized coal. At least one of ash, wollastonite powder, blast furnace slag powder, steel slag powder, kaolin, metakaolin, zeolite, the retarder is at least one of borax and boric acid; magnesia is calcined magnesia, electricity At least one of molten magnesia and seawater magnesia, the magnesia content in the calcined magnesia, fused magnesia or seawater magnesia is not less than 80%.
  8. 根据权利要求1所述的方法,其特征在于,重复步骤(4)和(5),获得多层纤维片材的胶粘剂-纤维片材增强材料层。The method of claim 1 wherein steps (4) and (5) are repeated to obtain an adhesive-fiber sheet reinforcement layer of the multilayer fiber sheet.
  9. 根据权利要求1所述的方法,其特征在于,按重量百分比,在粘剂中有机树脂占10-30%,无机胶粘剂占70-90%。The method according to claim 1, wherein the organic resin accounts for 10-30% by weight and the inorganic binder accounts for 70-90% by weight.
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CN103786382B (en) * 2013-12-13 2016-09-14 深圳大学 Inorganic glue fibrous composite reinforcement and protect concrete by method
CN104228184B (en) * 2014-09-19 2015-12-02 深圳大学 A kind of phosphate base fibrous composite and preparation method thereof

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