CN107806250B - Dry-hanging type external wall repairing and reinforcing method - Google Patents

Dry-hanging type external wall repairing and reinforcing method Download PDF

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Publication number
CN107806250B
CN107806250B CN201710984214.0A CN201710984214A CN107806250B CN 107806250 B CN107806250 B CN 107806250B CN 201710984214 A CN201710984214 A CN 201710984214A CN 107806250 B CN107806250 B CN 107806250B
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China
Prior art keywords
plate
layer
cement
dry
keel
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CN201710984214.0A
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CN107806250A (en
Inventor
郭锋
钱中秋
赵大军
吴开胜
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Jiangsu Nigao Science & Technology Co ltd
Changzhou Architectual Research Institute Group Co Ltd
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Jiangsu Nigao Science & Technology Co ltd
Changzhou Architectual Research Institute Group Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218Increasing or restoring the load-bearing capacity of building construction elements
    • 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
    • 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
    • C04B28/06Aluminous 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
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/70Grouts, e.g. injection mixtures for cables for prestressed concrete

Abstract

The invention discloses a dry-hanging type external wall repairing and reinforcing method, which comprises the following steps: laying a keel on the outer wall of the original building, and anchoring the keel on the base layer wall by using an anchor bolt; laying plates layer by layer on the keel from bottom to top, wherein the width of a plate seam is 1-1.5 cm, and sealing by using silicone sealant; and after the plate of one layer is laid, grouting the cavity of the plate and the base wall, and laying the next layer after the cavity is filled. The invention does not need to carry out large-area shoveling on the outer vertical surface of the original building, is convenient and fast to construct, is particularly suitable for the reconstruction of the existing building, and simultaneously avoids the problems of water accumulation and leakage which are easily caused by an empty cavity system after the building is used for a certain period of time.

Description

Dry-hanging type external wall repairing and reinforcing method
Technical Field
The invention relates to the technical field of external wall repair, in particular to a dry-hanging type external wall repair reinforcing method.
Background
The building outer wall has the functions of bearing certain load, shielding wind and rain, preserving heat, insulating heat, preventing noise, preventing fire, being an important component of the wall structure and the like. At present, building exterior walls are mostly built by concrete blocks, sintered bricks and other blocks, and in the construction process, external thermal insulation materials are needed. At present, the leakage problem of the outer wall of the building becomes a common quality disease of the building engineering, which is called as cancer of the building. The existing repairing method is used for removing the outer vertical face of the original building in a large area, the construction is complicated, and the repaired building has the problems of water accumulation and leakage which are easily caused by an empty cavity system after being used for a certain period.
Disclosure of Invention
The invention mainly solves the technical problem of providing a dry-hanging type external wall repairing and reinforcing method, which does not need to eradicate the external vertical surface of the original building in a large area, is convenient and fast to construct, is particularly suitable for the reconstruction of the existing building, and simultaneously avoids the problems of water accumulation and leakage which are easily caused by an empty cavity system after the building is used for a certain period of time.
In order to solve the technical problems, the invention adopts a technical scheme that: the dry hanging type outer wall repairing and reinforcing method comprises the following steps:
(1) laying a keel on the outer wall of the original building, and anchoring the keel on the base layer wall by using an anchor bolt;
(2) laying plates layer by layer on the keel from bottom to top, wherein the width of a plate seam is 1-1.5 cm, and sealing by using silicone sealant;
(3) and after the plate of one layer is laid, grouting the cavity of the plate and the base wall, and laying the next layer after the cavity is filled.
In a preferred embodiment of the present invention, the keel is a light steel keel.
In a preferred embodiment of the invention, the plate is a decorative plate or a heat-preservation and decorative integrated plate.
In a preferred embodiment of the present invention, the grouting material is rigid foam polyurethane, foamed cement or special grouting mortar.
In a preferred embodiment of the invention, the special grouting mortar comprises the following raw materials in parts by weight: 18-28% of Portland cement, 0-4% of special cement, 0-10% of fly ash, 45-70% of sand, 0-8% of lightweight aggregate, 0.02-0.1% of water-retaining agent, 0.05-1% of water reducing agent, 2-5% of redispersible latex powder and 0-0.5% of thixotropic agent.
In a preferred embodiment of the invention, the decorative plate is a dry-hanging stone panel, a cement fiber board or a calcium silicate board with a decorative surface; the heat-insulating layer in the heat-insulating and decorating integrated plate is an EPS plate, an XPS plate, a rock wool plate, a modified polystyrene board or a cement foaming plate, and the veneer layer is an aluminum plate, a calcium silicate plate, a cement fiber plate or a thin stone with a veneer.
In a preferred embodiment of the invention, the special cement is one of aluminate cement and sulphoaluminate cement, and the fly ash is class I fly ash.
In a preferred embodiment of the invention, the water retention agent is one of methyl cellulose ether, ethyl cellulose ether and propyl cellulose ether, and the water reducing agent is one of naphthalene-based, melamine-based and polycarboxylic acid-based water reducing agents.
In a preferred embodiment of the present invention, the redispersible latex powder is one of acrylic latex powder and vinyl acetate latex powder, and the thixotropic agent is one of attapulgite and bentonite.
The invention has the beneficial effects that:
1. the invention does not need to carry out large-area shoveling on the outer vertical surface of the original building, is convenient and fast to construct and is particularly suitable for the reconstruction of the existing building;
2. the invention adopts a dual mode of dry hanging and grouting to form a cavity-free system, thereby having fire resistance and high safety, and simultaneously avoiding the problems of water accumulation and leakage of the cavity-free system after the building is used for a certain period.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A dry-hanging type external wall repairing and reinforcing method comprises the following steps:
(1) laying a light steel keel on the outer wall of the original building, and anchoring the light steel keel on the base wall by using an anchor bolt;
(2) paving plates on the light steel keel layer by layer from bottom to top, wherein the width of a plate seam is 1cm, and sealing by using silicone sealant;
(3) and after the plate of one layer is laid, grouting the cavity of the plate and the base wall, and laying the next layer after the cavity is filled.
The board is a cement fiberboard decorative board, the grouting material is special grouting mortar, and the special grouting mortar comprises the following raw materials in parts by weight: 28% of portland cement, 10% of class I fly ash, 47.4% of sand, 8% of lightweight aggregate, 0.1% of methyl cellulose ether water-retaining agent, 1% of naphthalene water-reducing agent, 5% of acrylic latex powder and 0.5% of attapulgite thixotropic agent.
Example 2
A dry-hanging type external wall repairing and reinforcing method comprises the following steps:
(1) laying a light steel keel on the outer wall of the original building, and anchoring the light steel keel on the base wall by using an anchor bolt;
(2) paving plates layer by layer from bottom to top on the light steel keel, wherein the plate seam is 1.5cm wide and is sealed by silicone sealant;
(3) and after the plate of one layer is laid, grouting the cavity of the plate and the base wall, and laying the next layer after the cavity is filled.
The board is a heat-insulation and decoration integrated board, a heat-insulation layer in the heat-insulation and decoration integrated board is a modified polystyrene board, and a decorative layer is an aluminum board with a decorative surface; the special grouting mortar for the grouting material comprises the following raw materials in parts by weight: 18% of Portland cement, 4% of sulphoaluminate cement, 4.57% of class I fly ash, 70% of sand, 0.06% of ethyl cellulose ether water-retaining agent, 0.07% of melamine water-reducing agent, 3% of vinyl acetate latex powder and 0.3% of bentonite thixotropic agent.
Example 3
A dry-hanging type external wall repairing and reinforcing method comprises the following steps:
(1) laying a light steel keel on the outer wall of the original building, and anchoring the light steel keel on the base wall by using an anchor bolt;
(2) paving plates layer by layer from bottom to top on the light steel keel, wherein the plate joint is 1.2cm wide and is sealed by silicone sealant;
(3) and after the plate of one layer is laid, grouting the cavity of the plate and the base wall, and laying the next layer after the cavity is filled.
The plate is a heat-preservation and decoration integrated plate, a heat-preservation layer in the heat-preservation and decoration integrated plate is an EPS plate, and a decorative layer is an aluminum plate with a decorative surface; the grouting material is special grouting mortar which comprises the following raw materials in parts by weight: 23% of Portland cement, 2% of sulphoaluminate cement, 68.93% of sand, 4% of lightweight aggregate, 0.02% of propyl cellulose ether water-retaining agent, 0.05% of polycarboxylic acid water-reducing agent and 2% of acrylic latex powder.
The invention does not need to carry out large-area shoveling on the outer vertical surface of the original building, is convenient and fast to construct and is particularly suitable for the reconstruction of the existing building; the invention adopts a dual mode of dry hanging and grouting to form a cavity-free system, thereby having fire resistance and high safety, and simultaneously avoiding the problems of water accumulation and leakage of the cavity-free system after the building is used for a certain period.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (4)

1. A dry-hanging type external wall repairing and reinforcing method is characterized by comprising the following steps:
(1) laying a keel on the outer wall of the original building, and anchoring the keel on the base layer wall by using an anchor bolt;
(2) laying plates layer by layer on the keel from bottom to top, wherein the width of a plate seam is 1-1.5 cm, and sealing by using silicone sealant;
(3) after one layer of plate is laid, grouting is injected into the cavities of the plate and the base wall, and the next layer of plate is laid after the cavities are filled;
the plate is a decorative plate or a heat-preservation and decoration integrated plate;
the decorative plate is a dry-hanging stone panel, a cement fiber plate or a calcium silicate plate with a decorative surface; the heat-insulating layer in the heat-insulating and decorating integrated plate is an EPS plate, an XPS plate, a rock wool plate, a modified polystyrene board or a cement foaming plate, and the veneer layer is an aluminum plate, a calcium silicate plate, a cement fiber plate or a thin stone with a veneer;
the grouting material is hard foam polyurethane, foaming cement or special grouting mortar; the special grouting mortar comprises the following raw materials in parts by weight: 18-28% of Portland cement, 0-4% of special cement, 0-10% of fly ash, 45-70% of sand, 0-8% of lightweight aggregate, 0.02-0.1% of water-retaining agent, 0.05-1% of water reducing agent, 2-5% of redispersible latex powder and 0-0.5% of thixotropic agent;
the redispersible latex powder is one of acrylic latex powder and vinyl acetate latex powder, and the thixotropic agent is one of attapulgite and bentonite.
2. The dry-hanging type exterior wall repairing and reinforcing method as claimed in claim 1, wherein the keel is a light steel keel.
3. The dry-hanging type exterior wall repairing and reinforcing method according to claim 1, wherein the special cement is one of aluminate cement and sulphoaluminate cement, and is I-grade fly ash.
4. The dry-hanging type exterior wall repairing and reinforcing method as claimed in claim 1, wherein the water retaining agent is one of methyl cellulose ether, ethyl cellulose ether and propyl cellulose ether, and the water reducing agent is one of naphthalene-based, melamine-based and polycarboxylic acid-based water reducing agents.
CN201710984214.0A 2017-10-20 2017-10-20 Dry-hanging type external wall repairing and reinforcing method Active CN107806250B (en)

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CN107806250B true CN107806250B (en) 2020-09-11

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Publication number Priority date Publication date Assignee Title
CN109083440A (en) * 2018-09-30 2018-12-25 安徽远山电力工程有限公司 A kind of no cavity exterior wall repairing and reinforcing method
CN109826387A (en) * 2019-02-13 2019-05-31 江苏尼高科技有限公司 It is non-to root out formula outer thermal-insulation decorative restorative procedure
CN113833296A (en) * 2021-09-08 2021-12-24 杭州元创新型材料科技有限公司 Keel system installation method based on building outer wall transformation

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CN100469994C (en) * 2007-12-05 2009-03-18 北京住总集团有限责任公司 Dry-hanging keel decorative board heat insulation composite wall and its construction method
CN103771806A (en) * 2014-01-21 2014-05-07 厦门力嘉诚防水工程有限公司 Concrete crack repairing waterproof coating
CN203729464U (en) * 2014-02-14 2014-07-23 吕国兵 Decorative thermal insulation composite wall
CN203821627U (en) * 2014-03-07 2014-09-10 霍学朝 Wall structure system with light steel keels, and wall
CN105503072A (en) * 2015-12-10 2016-04-20 华砂砂浆有限责任公司 Tile grout composition and preparation method and application thereof

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