CN109437747A - Concrete structure protection materials - Google Patents

Concrete structure protection materials Download PDF

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Publication number
CN109437747A
CN109437747A CN201811485860.3A CN201811485860A CN109437747A CN 109437747 A CN109437747 A CN 109437747A CN 201811485860 A CN201811485860 A CN 201811485860A CN 109437747 A CN109437747 A CN 109437747A
Authority
CN
China
Prior art keywords
concrete
protection materials
melamine resin
protection
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811485860.3A
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Chinese (zh)
Inventor
徐文冰
余以明
吴柯
刘旷怡
李顺凯
马晓旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHINA COMMUNICATIONS WUHAN INSTITUTE OF HARBOR ENGINEERING DESIGN Co Ltd
CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd
Original Assignee
CHINA COMMUNICATIONS WUHAN INSTITUTE OF HARBOR ENGINEERING DESIGN Co Ltd
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 CHINA COMMUNICATIONS WUHAN INSTITUTE OF HARBOR ENGINEERING DESIGN Co Ltd filed Critical CHINA COMMUNICATIONS WUHAN INSTITUTE OF HARBOR ENGINEERING DESIGN Co Ltd
Priority to CN201811485860.3A priority Critical patent/CN109437747A/en
Publication of CN109437747A publication Critical patent/CN109437747A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5024Silicates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61Coating or impregnation
    • C04B41/65Coating or impregnation with inorganic materials
    • C04B41/68Silicic acid; Silicates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B3/00Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/16Sealings or joints
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a kind of concrete structure protection materials, including following bottom starting components and its weight percent: 100 parts of portland cements;40~100 parts of mineral admixtures;2~6 parts of melamine resin microcapsules;0.5~1.5 part of cellulose high water absorbency polymer;120~200 parts of water.Concrete structure protection materials of the invention integrate selfreparing, high water absorption and corrosion proof function, and the selfreparing protection anti-corrosion behind damage deformation or crack occur in the precoating protection anti-corrosion and concrete structure that can be used for concrete in marine environment works.

Description

Concrete structure protection materials
Technical field
The present invention relates to concrete structure protection techniques, in particular to a kind of concrete structure protection materials.
Background technique
The additional anticorrosive measure that concrete structure surface layer under marine environment within the design protection time limit 20 years is taken Mainly have: surface covering and impregnating with silane etc..Wherein, lacquer systems can be made of bottom, middle layer, investment precoat, or It is made of bottom and investment precoat;Epoxy resin sealing paint, acrylic resin seal coat etc. can be used in bottom coating;Middle layer applies Expect that epoxy resin coating etc. can be used;Fluorine carbon finishing paint, polysiloxane topcoat, polyurethane finish, acrylic acid tree can be used in investment precoat Rouge paint, chlorinated rubber paint etc..Concrete impregnating with silane generally uses three ethoxy of iso-octyl triethoxy paste silane or isobutyl group Base liquid silane.
It is complete that the anticorrosion technique measure of above concrete in marine environment works surface layer is based on concrete structure surface layer It is good, there is not cracking phenomena, so as to which there is preferable protection effect to corrosion caused by the corrosive medias such as seawater, salt fog Fruit, but existing surface layer anticorrosion technique measure is generally passive protection, once concrete structure cracks, with upper epidermis Anticorrosion technique measure will lose its safeguard function.
Summary of the invention
Present invention aim to provide a kind of concrete structure protection materials, which may not only be applied to ocean ring Under border concrete structure precoating protect anti-corrosion, it may also be used for concrete structure occur damage deformation or crack after from Restoration and protection anti-corrosion.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of concrete structure protection materials, including with Lower bottom starting components and its weight percent:
Further, including following bottom starting components and its weight percent:
Further, the portland cement is P.O42.5 grade ordinary portland cements, specific surface area for 300~ 400m2/kg。
Further, the mineral admixture is combined by slag powders and flyash by 1: 1~1: 3 mass ratio, mine Ground-slag is S95 grade slag powder, and flyash is II grade of flyash, the equal 400~450m of the specific surface area of flyash and slag powders2/kg。
Further, the melamine resin microcapsules are using melamine resin as cyst wall, in cyst wall package epoxy resin E-51 and The mixture of waterglass and sodium oxide molybdena is as core material, and the melamine resin Microcapsules Size is 1~10 μm, and the core material quality accounts for The 50~80% of the melamine resin microcapsules gross mass.
Further, the modulus of water glass is 1.0~2.0, and the quality of sodium oxide molybdena accounts for waterglass and sodium oxide molybdena mixture The 4~7% of gross mass.
Further, the cellulose high water absorbency polymer be using sodium carboxymethylcellulose as raw material, grafted amino group acid, Acrylamide formed super absorbent resin, weight proportion are as follows: sodium carboxymethylcellulose: amino acid: acrylamide be 1:2~ 4:2~4.
The construction method of above-mentioned concrete structure protection materials, comprising the following steps:
1) weight proportion for pressing the bottom starting components, weighs portland cement, the mineral of corresponding parts by weight respectively Admixture, melamine resin microcapsules, cellulose high water absorbency polymer and water, it is spare;
2) by the portland cement weighed up, mineral admixture, melamine resin microcapsules, cellulose high water absorbency polymer and Water is uniformly mixed, and obtains concrete structure protection materials;
3) by the concrete structure protection materials coated on the concrete surface to coating, to concrete surface defect Repair and concrete surface is conserved;
4) after the concrete structure protection materials are dry, one layer of chlorinated rubber paint surface protection is sprayed again on it Agent.
Compared with prior art, the invention has the following advantages that
First, concrete structure protection materials of the invention are coated on concrete surface, when concrete surface is intact, The selfreparing works protection materials system can play corrosion proof function, especially when concrete structure occur damage deformation or When crack, on the one hand, the tiny capsules in the material system are generated rupture by the effect of crack stress, the bonding material in capsule Material will have an effect at crack with other selfreparing composite materials;On the other hand, crack is larger at this, destroys coagulation Native surface total object protection materials system, so that the corrosive media in seawater or air is easy intrusion to Surface layer's concrete And the reinforcing bar in protective layer cause corrosion when, super absorbent polymer polymer can absorb a large amount of moisture, further promote from The intelligent repair of repair materials is accelerated the repairing of self-repair material system fracture and has been formed again in concrete surface Whole closed protective layer, to improve the durability of concrete and the service life of works.
Second, concrete structure protection materials of the invention integrate selfreparing, high water absorption and corrosion proof function, it can After precoating for concrete in marine environment works protects anti-corrosion and concrete structure damage deformation or crack occur Selfreparing protect anti-corrosion.
Third, concrete structure protection materials composition of the invention is simple, it can be achieved that batch production is prefabricated, site operation When, a layer concrete works protection materials are first spread, then spray layer of surface protective agent, compared to conventional concrete table Face corrosion protection system has the advantages that easy construction, is automatically repaired (active defense), greatly improves concrete structure Durability and service life.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below, convenient for more clearly understanding the present invention, But limiting the invention for they.
Examples 1 to 2 and comparative example 1
1) weight proportion for pressing bottom raw material components, weighs ordinary portland cement, mineral admixture, melamine resin respectively Microcapsules, cellulose high water absorbency polymer and water, it is spare.Wherein raw material preparation is as follows:
Ordinary portland cement is the P.O42.5 grade normal silicate water of Ningbo Ke Huan New Building Materials Co., Ltd Mud, specific surface area 360m2/ kg, presetting period 199min, final setting time 252min, 3d compression strength and flexural strength difference For 26.9MPa and 5.7MPa, 28d compression strength and flexural strength are respectively 51.8MPa and 8.0MPa;
The weight ratio of flyash and slag powders is 2 in mineral admixture, and flyash is that the building materials trade of Beilun In Ningbo day road has II grade of flyash of limit company, fineness 23.5%, loss on ignition 7.9%, water demand ratio 104%, 28d activity index 74%;Mine Ground-slag be S95 grades of miberal powders of New Building Materials Co., Ltd, Zhangjiagang Hengchang, specific surface area 414m2/kg, loss on ignition 0.8%, Water demand ratio 98%, fluidity is than 102%, 28d activity index 99%;
Melamine resin microcapsules are The Second Harbor Engineering Wuhan Harbour New Material Co., Ltd.'s production, and cyst wall partial size is 5 μm, core material Weight accounts for the 70% of microcapsules total weight.Wherein, core material includes two kinds of ingredients, and one is epoxy resin E-51, and another is waterglass With the mixture of sodium oxide molybdena, modulus of water glass 1.5, the content of sodium oxide molybdena is 6%;
Cellulose high water absorbency polymer is The Second Harbor Engineering Wuhan Harbour New Material Co., Ltd.'s production, the high water absorption of preparation Property polymer suck ionized water rate be 545.2g/g, suctions tap water rate be 100.2g/g, suction physiological saline rate be 40.5g/g;
Mixing water is clean tap water.
2) ordinary portland cement weighed up, mineral admixture, melamine resin microcapsules, cellulose high-hydroscopicity are polymerize Object and hydromining are manually or mortar mixer is uniformly mixed, and obtain concrete structure protection materials;
3) concrete structure protection materials carry out concrete surface defect coated on the concrete surface to coating It repairs and concrete surface is conserved, wherein the age of concrete to coating should not be less than 28d, and answer acceptance(check);To The concrete surface of coating must not be attached with clast, dust, greasy dirt and curing compound etc.;It, can be first to enhance adhesiving effect A bed boundary modifying agent is coated in concrete surface, is applied after interface modifier is dry, then by concrete structure protection materials Spread on concrete surface;
4) after concrete structure protection materials are dry, one layer 200 μm of chlorinated rubber paint surface is sprayed again on it Protective agent.
Examples 1 to 2 is to be used for using what raw material of the present invention and its corresponding component ratio and construction method carried out Concrete in marine environment works precoating protection anti-corrosion and concrete structure occur damage deformation or crack after from Restoration and protection anti-corrosion, comparative example 1 are using above-mentioned raw material and construction method, but the structure not being formulated in ratio of the present invention Each starting components weight proportion of object protection materials system, Examples 1 to 2 and comparative example 1, as shown in table 1:
Table 1
The Specifeca tion speeification of concrete structure protection materials made from Examples 1 to 2 and comparative example 1 is as shown in table 2:
Table 2
From table 2 it can be seen that not by the 28d flexural strength of the comparative example 1 of weight proportion of the present invention, 28d compression strength phase There is apparent reduction to Examples 1 to 2, Anti-Chloride Ion Penetration also decreases.
Precompressed is carried out to Examples 1 to 2 and comparative example 1 after 56d, precompressed value is the 80% of its compression strength, produces sample Raw micro-crack, then continues standard curing for the sample after precompressed, compression strength after testing its precompressed maintenance 7d and anti- Corrosive nature, Examples 1 to 2 and comparative example 1 are after concrete structure protection materials repair micro-crack, pressure resistance Degree and Anti-Chloride Ion Penetration increase, but the compression strength of embodiment 2, resisting chloride ion penetration performance increase at most, phase It is relatively more than increasing in the Corrosion Protection of comparative example 1, Examples 1 to 2.Therefore, the present invention is for coagulation under marine environment There is the selfreparing protection anti-corrosion tool behind damage deformation or crack in the precoating protection anti-corrosion and concrete structure of soil structure object There is extraordinary performance indexes, there is good feasibility and application, be provided simultaneously with that other materials do not have reviews one's lessons by oneself Renaturation energy solves traditional surface layer anticorrosion technique after cracking occurs in concrete structure, loses asking for corrosion proof function Topic, ensure that bridge, tunnel and the quality of port engineering.

Claims (8)

1. a kind of concrete structure protection materials, it is characterised in that: including following bottom starting components and its weight percent Than:
2. concrete structure protection materials according to claim 1, it is characterised in that: including following bottom starting components And its weight percent:
3. concrete structure protection materials according to claim 1 or claim 2, it is characterised in that: the portland cement is P.O42.5 grades of ordinary portland cements, specific surface area are 300~400m2/kg。
4. concrete structure protection materials according to claim 1 or claim 2, it is characterised in that: the mineral admixture is by mine Ground-slag and flyash are combined by 1: 1~1: 3 mass ratio, and slag powders are S95 grade slag powder, and flyash is II grade of fine coal Equal 400~the 450m of the specific surface area of ash, flyash and slag powders2/kg。
5. concrete structure protection materials according to claim 1 or claim 2, it is characterised in that: the melamine resin microcapsules Using melamine resin as cyst wall, the mixture of package epoxy resin E-51 and waterglass and sodium oxide molybdena is described as core material in cyst wall Melamine resin Microcapsules Size is 1~10 μm, and the core material quality accounts for the 50~80% of the melamine resin microcapsules gross mass.
6. concrete structure protection materials according to claim 5, it is characterised in that: the modulus of water glass be 1.0~ 2.0, the quality of sodium oxide molybdena accounts for the 4~7% of waterglass and sodium oxide molybdena mixture gross mass.
7. concrete structure protection materials according to claim 1 or claim 2, it is characterised in that: the cellulose high-hydroscopicity Polymer is using sodium carboxymethylcellulose as raw material, and the super absorbent resin that grafted amino group acid, acrylamide are formed, weight is matched Than are as follows: sodium carboxymethylcellulose: amino acid: acrylamide is 1:2~4:2~4.
8. the construction method of concrete structure protection materials according to claim 1, it is characterised in that: including following step It is rapid:
1) weight proportion for pressing the bottom starting components weighs the portland cement of corresponding parts by weight respectively, mineral blend Material, melamine resin microcapsules, cellulose high water absorbency polymer and water, it is spare;
2) portland cement weighed up, mineral admixture, melamine resin microcapsules, cellulose high water absorbency polymer and water are mixed It closes uniformly, obtains concrete structure protection materials;
3) the concrete structure protection materials carry out concrete surface defect coated on the concrete surface to coating It repairs and concrete surface is conserved;
4) after the concrete structure protection materials are dry, one layer of chlorinated rubber paint surface protectant is sprayed again on it i.e. It can.
CN201811485860.3A 2018-12-06 2018-12-06 Concrete structure protection materials Pending CN109437747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811485860.3A CN109437747A (en) 2018-12-06 2018-12-06 Concrete structure protection materials

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Application Number Priority Date Filing Date Title
CN201811485860.3A CN109437747A (en) 2018-12-06 2018-12-06 Concrete structure protection materials

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020117086A1 (en) * 2000-12-19 2002-08-29 Caijun Shi Low shrinkage, high strength cellular lightweight concrete
CN101041577A (en) * 2006-03-23 2007-09-26 同济大学 Polystyrene foam particle heat-insulating mortar
CN101239800A (en) * 2008-03-07 2008-08-13 哈尔滨工业大学 Carbon nano-tube enhanced cement-base composite material and preparation method thereof
WO2010112197A1 (en) * 2009-03-30 2010-10-07 J. Rettenmaier & Söhne Gmbh + Co. Kg Fibrous material as an additive for a construction product
CN103030329A (en) * 2013-01-05 2013-04-10 上海富春建业科技股份有限公司 Enhanced admixture for municipal refuse recycled concrete as well as preparation method thereof and application thereof
CN107473675A (en) * 2017-08-03 2017-12-15 青岛理工大学 GO and the scattered CNT modified Nano construction materials of nanometer miberal powder collaboration and preparation method and application

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020117086A1 (en) * 2000-12-19 2002-08-29 Caijun Shi Low shrinkage, high strength cellular lightweight concrete
CN101041577A (en) * 2006-03-23 2007-09-26 同济大学 Polystyrene foam particle heat-insulating mortar
CN101239800A (en) * 2008-03-07 2008-08-13 哈尔滨工业大学 Carbon nano-tube enhanced cement-base composite material and preparation method thereof
WO2010112197A1 (en) * 2009-03-30 2010-10-07 J. Rettenmaier & Söhne Gmbh + Co. Kg Fibrous material as an additive for a construction product
CN103030329A (en) * 2013-01-05 2013-04-10 上海富春建业科技股份有限公司 Enhanced admixture for municipal refuse recycled concrete as well as preparation method thereof and application thereof
CN107473675A (en) * 2017-08-03 2017-12-15 青岛理工大学 GO and the scattered CNT modified Nano construction materials of nanometer miberal powder collaboration and preparation method and application

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