CN109020370B - Interface mortar with anticorrosive coating for steel structure exterior wall - Google Patents

Interface mortar with anticorrosive coating for steel structure exterior wall Download PDF

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Publication number
CN109020370B
CN109020370B CN201810921144.9A CN201810921144A CN109020370B CN 109020370 B CN109020370 B CN 109020370B CN 201810921144 A CN201810921144 A CN 201810921144A CN 109020370 B CN109020370 B CN 109020370B
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Prior art keywords
mortar
steel structure
parts
cellulose ether
anticorrosive coating
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CN109020370A (en
Inventor
陈勇敢
尹卫泽
刘晓光
单银木
胡立黎
张先进
李鹏
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Hangxiao Steel Structure Co ltd
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Hangxiao Steel Structure Co ltd
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    • 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00Coverings or linings, e.g. for walls or ceilings
    • E04F13/02Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
    • 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 relates to interface mortar with an anticorrosive coating for a steel structure outer wall, which comprises cement, sand, redispersible latex powder, a water repellent, a defoaming agent and cellulose ether, wherein the weight ratio of the components is as follows: 700 parts of cement 200-. The beneficial effects are as follows: the interface mortar provided by the invention can effectively ensure the bonding with the surface of the steel structure base layer with the anticorrosive coating, and has good bonded performance with plastering materials such as heat-insulating mortar, bonding mortar, plastering mortar, waterproof mortar and the like.

Description

Interface mortar with anticorrosive coating for steel structure exterior wall
Technical Field
The invention relates to the technical field of building materials, in particular to interface mortar with an anticorrosive coating for a steel structure outer wall.
Background
Compared with the traditional house, the steel structure house has strong advantages in the aspects of structural performance, use function, design construction, comprehensive construction cost and the like, the development of the steel structure house has epoch-making significance in the aspects of pushing house industrialization and improving house quality, is beneficial to promoting the technical progress of the building industry in China, is beneficial to pulling the internal demand of the metallurgical industry and promoting the development of energy-saving and environment-friendly building materials, and is one of the transformation and upgrading directions of the building industry.
The enclosure system is an important system of a steel structure house, not only needs to meet the requirement of light weight, but also needs to have enough rigidity and strength, and also needs to meet the requirements of fire resistance, sealing performance, thermal performance, sound insulation performance and decorative performance, so that the enclosure system is one of the bottlenecks of the current popularization of the steel structure house, and is also the core of research.
The enclosure system needs to realize the above-mentioned multiple functions, and the construction thereof necessarily needs the combination of multiple materials, and because the interface between the base layer and the covering layer materials has different shapes, the bonding strength between the base layer and the covering layer materials often cannot meet the requirement of practical use, so the interface mortar becomes an essential part. The interface mortar is used as a connecting layer between a base layer and a covering layer of the enclosure system, the tensile bonding strength of the interface mortar is a very important index, the problems of hollowing, falling, poor bonding and the like of the enclosure system caused by insufficient performance of the interface mortar are endless, the existing interface mortar is almost only suitable for bonding between concrete, a masonry base layer and a covering layer material, and the single-component interface mortar specially suitable for a steel structure outer wall with an anticorrosive coating is lacked at present.
Compared with concrete and masonry base layers, the steel structure base layer with the organic anti-corrosion coating has the advantages that the density of the surface of the steel structure base layer is much higher, the steel structure base layer is extremely smooth and almost free of water absorption, and the mechanical engaging force provided by the steel structure base layer is extremely weak, so that the steel structure has special requirements on interface mortar, the interface mortar used for the traditional concrete structure, masonry structure and the like is not suitable for the steel structure with the organic anti-corrosion coating, and the bonding performance of the interface mortar cannot meet the requirements; in addition, the durability problems of rainwater wetting, freeze thawing, tensile bonding strength reduction after thermal aging and the like of the interface mortar for the outer wall are considered.
Therefore, the invention aims to provide the interface mortar which can effectively ensure the bonding with the surface of the steel structure base layer with the anticorrosive coating, can have good bonding performance with plastering materials such as thermal insulation mortar, bonding mortar, plastering mortar, waterproof mortar and the like, has the advantages of good waterproofness and less reduction of tensile bonding strength after soaking, freeze thawing and heat treatment, and has good popularization and application prospects.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide interface mortar with an anticorrosive coating for a steel structure outer wall.
The invention relates to interface mortar with an anticorrosive coating for a steel structure outer wall, which adopts the technical scheme that: the water repellent cement comprises cement, sand, redispersible latex powder, a water repellent, a defoaming agent and cellulose ether, wherein the weight ratio of the components is as follows: 700 parts of cement 200-.
The invention provides interface mortar with an anticorrosive coating for a steel structure outer wall, which also comprises the following auxiliary technical scheme:
wherein, the cement comprises 550 parts of cement, 450 parts of sand, 700 parts of redispersible latex powder, 45-100 parts of water repellent, 0.6-2.5 parts of defoamer, 0.3-1.0 part of defoamer and 0.4-1.4 parts of cellulose ether.
Wherein the water repellent is a silane-based water repellent; the defoaming agent is a silicone defoaming agent or a polyether defoaming agent.
Wherein, the redispersible latex is one or more of ethylene vinyl acetate copolymer, acrylate copolymer or styrene-butadiene copolymer.
Wherein the cellulose ether is one or more of methyl cellulose ether, hydroxyethyl cellulose ether, hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether.
Wherein the cement is ordinary portland cement, and the strength grade of the cement is not lower than 42.5 grade; the sand is medium sand.
The invention also provides a preparation method of the interface mortar with the anticorrosive coating for the steel structure exterior wall, which is characterized in that 700 parts of 200-containing cement, 800 parts of 200-containing sand, 30-120 parts of redispersible latex powder, 0.3-3.0 parts of water repellent, 0.1-2.0 parts of defoaming agent and 0.2-2.5 parts of cellulose ether are weighed, water is added according to the water-material ratio of 0.1-0.3, and the mixture is uniformly stirred.
The invention also provides a construction method of the interface mortar with the anticorrosive coating for the steel structure exterior wall, during construction, water is taken firstly, the interface mortar is mixed with the water, and after the water and the interface mortar are uniformly stirred, the construction is carried out by adopting a manual smearing or mechanical spraying method.
The implementation of the invention comprises the following technical effects:
the interface mortar for the steel structure exterior wall with the anticorrosive coating can effectively ensure the bonding with the surface of a steel structure base layer with the anticorrosive coating, has good bonding performance with plastering materials such as heat-insulating mortar, bonding mortar, plastering mortar, waterproof mortar and the like, has good affinity with the surface of the steel structure with the anticorrosive coating, high tensile bonding strength and good bonding performance compared with the traditional interface mortar for concrete and masonry base layers, reduces the tensile bonding strength after soaking, freezing and thawing and heat treatment, has better durability, and can meet the requirements of the use environment of the exterior wall. The cement and the redispersible latex powder form a composite gelled material system together; the cement has the functions of providing initial bonding strength through initial rapid hydration, emulsifying and forming a film after the redispersible latex powder is contacted with water, forming an interpenetrating network structure with a hydration product of the cement, forming good bonding performance on the surface of a steel structure with an anticorrosive coating and having certain deformation resistance; the water repellent can make the interface mortar for the outer wall obtain indispensable waterproof performance and maintain long-term effect; the defoaming agent can eliminate excessive bubbles generated during mortar mixing, improve the surface state of mortar and promote the tensile bonding strength of mortar to be improved; the cellulose ether can improve the construction performance and the water retention performance of the interface mortar and has an auxiliary effect on improving the bonding performance of the interface mortar.
Detailed Description
The present invention will be described in detail with reference to the following examples, which are intended to facilitate the understanding of the present invention and should not be construed as limiting in any way.
The invention provides interface mortar with an anticorrosive coating for a steel structure outer wall, which comprises cement, sand, redispersible latex powder, a water repellent, a defoaming agent and cellulose ether, wherein the weight ratio of the components is as follows: 700 parts of cement 200-. The interface mortar can effectively ensure the bonding with the surface of the steel structure base layer with the anticorrosive coating, and has good bonding performance with plastering materials such as heat-insulating mortar, bonding mortar, plastering mortar, waterproof mortar and the like. The cement and the redispersible latex powder form a composite gelled material system together; the cement has the functions of providing initial bonding strength through initial rapid hydration, emulsifying and forming a film after the redispersible latex powder is contacted with water, forming an interpenetrating network structure with a hydration product of the cement, forming good bonding performance on the surface of a steel structure with an anticorrosive coating and having certain deformation resistance; the water repellent can make the interface mortar for the outer wall obtain indispensable waterproof performance and maintain long-term effect; the defoaming agent can eliminate excessive bubbles generated during mortar mixing, improve the surface state of mortar and promote the tensile bonding strength of mortar to be improved; the cellulose ether can improve the construction performance and the water retention performance of the interface mortar and has an auxiliary effect on improving the bonding performance of the interface mortar.
At present, the production, sale and application of the special interface mortar with the anticorrosive coating for the steel structure outer wall are not seen in the market, so the test comparison between the interface mortar with the anticorrosive coating for the steel structure outer wall provided by the invention and the common concrete interface mortar in the market is carried out, and the results are shown in the following table:
three layers of paint are generally coated on the steel plate according to requirements, wherein one layer of paint directly contacting with the steel plate is a base layer, the outermost layer is a surface layer, and a middle layer is positioned between the base layer and the surface layer.
The data in the table show that the existing concrete interface mortar is not suitable for the steel structure with the anticorrosive coating, and the interface mortar for the steel structure outer wall with the anticorrosive coating provided by the invention has unique application value in the field of the steel structure.
Preferably, the interface mortar with the anticorrosive coating for the steel structure exterior wall comprises 550 parts of cement 300-.
Preferably, the water repellent is a silane-based water repellent.
Preferably, the defoaming agent is a silicone-based or polyether-based defoaming agent.
The cement is ordinary portland cement, and the strength grade of the cement is not lower than 42.5 grade.
Preferably, the sand is medium sand.
Preferably, the redispersible latex powder is one or more of ethylene vinyl acetate copolymer, acrylate copolymer or styrene-butadiene copolymer.
Preferably, the cellulose ether is one or more of methyl cellulose ether, hydroxyethyl cellulose ether, hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether.
The invention also provides a preparation method of the interface mortar with the anticorrosive coating for the steel structure exterior wall, which comprises the steps of weighing 700 parts of 200-fold sand, 800 parts of 200-fold sand, 30-120 parts of redispersible latex powder, 0.3-3.0 parts of water repellent, 0.1-1.3 parts of defoaming agent and 0.2-2.5 parts of cellulose ether, adding a certain mass of water according to the water-material ratio of 0.1-0.3, and uniformly stirring.
The invention also provides a construction method of the interface mortar with the anticorrosive coating for the steel structure outer wall.
The interface mortar and the construction method of the interface mortar provided by the present invention will be described below with specific examples.
Example 1
The interface mortar with anticorrosive coating for outer wall of steel structure is compounded with common Portland cement of 42.5 level 400, medium sand 600, acrylate copolymer emulsion powder 90, water repellent 0.8, defoaming agent 0.4 and ethyl methyl cellulose ether 1.0 weight portions. 140 parts of water is added and uniformly stirred, and after standard maintenance is carried out for 7d, the tensile bonding strength of the mortar and the steel plate with the middle-layer anticorrosive coating, which is not treated, is 1.2 MPa; after standard curing for 7d, the tensile bond strength of the mortar and the steel plate with the middle layer anticorrosive coating provided by the embodiment after being soaked in water for 7d is 0.7 MPa; after standard curing for 7d, the tensile bonding strength of the mortar and the steel plate with the middle layer anticorrosive coating after being subjected to reheating aging for 7d is 0.9 MPa; after standard maintenance for 7d, the tensile bonding strength of the mortar and the steel plate with the middle-layer anticorrosive coating provided by the embodiment after 25 times of freezing-melting circulating treatment is 0.6 MPa; the bonding strength of the mortar and the III type inorganic lightweight aggregate thermal insulation mortar provided by the embodiment is 0.4 MPa; the mortar provided in this example had a tensile bond strength of 0.9MPa at an operable time of 60 min.
Example 2
The interface mortar with anticorrosive coating for outer wall of steel structure is compounded with common Portland cement of 42.5 grade 450, medium sand 550, ethylene-vinyl acetate emulsion powder 100, water repellent 2.5, defoaming agent 1.0 and hydroxypropyl methyl cellulose ether 0.5 in weight portions. 150 parts of water is added and uniformly stirred, and after standard maintenance is carried out for 7d, the tensile bonding strength of the mortar and the steel plate with the middle-layer anticorrosive coating, which is not treated, is 1.1 MPa; after standard maintenance for 7d, the tensile bonding strength of the mortar and the steel plate with the middle layer anticorrosive coating provided by the embodiment after being soaked for 7d is 0.6 MPa; after standard curing for 7d, the tensile bonding strength of the mortar and the steel plate with the middle layer anticorrosive coating after being subjected to reheating aging for 7d is 0.8 MPa; after standard maintenance for 7d, the tensile bonding strength of the mortar and the steel plate with the middle-layer anticorrosive coating provided by the embodiment after 25 times of freezing-melting circulating treatment is 0.5 MPa; the bonding strength of the mortar and the III type inorganic lightweight aggregate thermal insulation mortar provided by the embodiment is 0.4 MPa; the tensile bond strength of the mortar provided in this example was 0.8MPa at an operable time of 60 min.
Example 3
An interface mortar with an anticorrosive coating for a steel structure exterior wall comprises the following components in parts by weight,
the water repellent is prepared from 42.5-grade ordinary portland cement 550, medium sand 450, ethylene vinyl acetate latex powder 40, butylbenzene latex powder 60, water repellent 1.5, defoaming agent 0.8 and hydroxyethyl methyl cellulose ether 0.5. 155 parts of water is added and uniformly stirred, and after standard maintenance is carried out for 7d, the tensile bonding strength between the mortar and the steel plate with the middle-layer anticorrosive coating without any treatment is 1.0 MPa; after standard curing for 7d, the tensile bond strength of the mortar and the steel plate with the middle layer anticorrosive coating provided by the embodiment after being soaked in water for 7d is 0.5 MPa; after standard curing for 7d, the tensile bonding strength of the mortar and the steel plate with the middle layer anticorrosive coating after being subjected to reheating aging for 7d is 0.8 MPa; after standard maintenance for 7d, the tensile bonding strength of the mortar and the steel plate with the middle-layer anticorrosive coating provided by the embodiment after 25 times of freezing-melting circulating treatment is 0.5 MPa; the bonding strength of the mortar and the III type inorganic lightweight aggregate thermal insulation mortar provided by the embodiment is 0.3 MPa; the tensile bond strength of the mortar provided in this example was 0.8MPa at an operable time of 60 min.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. The application of the interface mortar with the anticorrosive coating for the steel structure outer wall in the steel structure comprises the following steps: the interface mortar comprises cement, sand, redispersible latex powder, a water repellent, a defoaming agent and cellulose ether, wherein the weight ratio of the components is as follows:
the preparation method of the interface mortar comprises the following steps: weighing 700 parts of 200-800 parts of cement, 200-800 parts of sand, 30-120 parts of redispersible latex powder, 0.3-3.0 parts of water repellent, 0.1-2.0 parts of defoaming agent and 0.2-2.5 parts of cellulose ether, adding water according to the proportion of 0.1-0.3 of water-material ratio, and uniformly stirring;
the construction method of the interface mortar comprises the following steps: during construction, water and interface mortar are taken and mixed, and after the mixture is uniformly stirred, the steel structure surface with the anticorrosive coating is constructed by adopting a manual smearing or mechanical spraying method.
2. Use according to claim 1, characterized in that: the water repellent is a silane-based water repellent.
3. Use according to claim 1, characterized in that: the defoaming agent is a silicone defoaming agent or a polyether defoaming agent.
4. Use according to claim 1, characterized in that: the cellulose ether is one or more of methyl cellulose ether, hydroxyethyl cellulose ether, hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether.
5. Use according to claim 1, characterized in that: the cement is ordinary portland cement, and the strength grade of the cement is not lower than 42.5 grade; the sand is medium sand.
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111748229A (en) * 2020-07-01 2020-10-09 杭州铁木辛柯建筑结构设计事务所有限公司 Indoor type anticorrosion interface agent suitable for surfaces of bare steel and galvanized steel sheets
CN112279566A (en) * 2020-09-22 2021-01-29 浙江忠信新型建材股份有限公司 Special bonding mortar for stainless steel plate for fabricated building and preparation method thereof
CN113402220A (en) * 2021-01-21 2021-09-17 山东科技大学 Application of waste clay brick powder in preparation of plastering mortar and preparation method thereof
CN113533198A (en) * 2021-07-26 2021-10-22 天津市建筑材料科学研究院有限公司 Method for detecting adhesive property of back adhesive of ceramic facing brick

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Publication number Priority date Publication date Assignee Title
EP0461738B1 (en) * 1990-06-12 1995-01-18 W.R. Grace & Co.-Conn. Strength enhancing additive and water repellant mortars containing same
CN101269936A (en) * 2008-03-21 2008-09-24 长沙归一建材科技有限公司 Interface mortar
CN101786829A (en) * 2010-01-29 2010-07-28 天津市金岸保温材料有限公司 Fireproof interface mortar, preparation method and application thereof
CN102464477A (en) * 2010-11-16 2012-05-23 深圳市西蒙建筑材料有限公司 STUCCO wall decoration mortar and construction technology thereof
CN103332901A (en) * 2013-06-27 2013-10-02 杭州正博新型建筑材料有限公司 Anti-cracking waterproof mortar

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461738B1 (en) * 1990-06-12 1995-01-18 W.R. Grace & Co.-Conn. Strength enhancing additive and water repellant mortars containing same
CN101269936A (en) * 2008-03-21 2008-09-24 长沙归一建材科技有限公司 Interface mortar
CN101786829A (en) * 2010-01-29 2010-07-28 天津市金岸保温材料有限公司 Fireproof interface mortar, preparation method and application thereof
CN102464477A (en) * 2010-11-16 2012-05-23 深圳市西蒙建筑材料有限公司 STUCCO wall decoration mortar and construction technology thereof
CN103332901A (en) * 2013-06-27 2013-10-02 杭州正博新型建筑材料有限公司 Anti-cracking waterproof mortar

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