CN108374566A - A kind of back side percolating water repairerment technique - Google Patents

A kind of back side percolating water repairerment technique Download PDF

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Publication number
CN108374566A
CN108374566A CN201810119058.6A CN201810119058A CN108374566A CN 108374566 A CN108374566 A CN 108374566A CN 201810119058 A CN201810119058 A CN 201810119058A CN 108374566 A CN108374566 A CN 108374566A
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parts
back side
weight
wall
percolating water
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CN108374566B (en
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刘志宏
许奕钊
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Xiamen Waterproof Doctor Engineering Technology Co ltd
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XIAMEN DR WATERPROOF CONSTRUCTION ENGINEERING Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions 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
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions 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
    • C04B28/06—Aluminous cements
    • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34—Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72—Repairing or restoring existing buildings or building materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Sealing Material Composition (AREA)
  • Finishing Walls (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

The invention discloses a kind of back side percolating waters to repair technique comprising following steps：The brick wall for cutting back side building wall first, forms construction part；Then interface waterproofing agent is brushed；Bar planting is carried out between the top brick body and lower concrete floor of construction part；Pour expansion water-tight concrete；Internal corner part digs out " V " shape slot after solidification；Then interface waterproofing agent is brushed again；" V " shape slot is sealed with waterproof gasket cement；Inner corner trim is reinforced blocking using mending mortar, and is arc-shaped the gradient；Then first of negative side waterproofing coating is brushed；Cracking resistance mylar is added at the wall handing-over position at inner corner trim and top；Brushing second negative side waterproofing coating again；It is painted using mending mortar smooth；Last above ground portion uses wet mortar to be laid with ceramic tile after scraping glue for tile；Scraped using exterior wall putty painting charge levelling in metope part.The present invention is combined by structure design using a variety of waterproof materials, and with technique, and system solves back side leakage problem.

Description

A kind of back side percolating water repairerment technique
Technical field
The present invention relates to building engineering fields, and in particular to a kind of back side percolating water repairerment technique.
Background technology
The inner corner trim of wall is the privileged sites for easily generating leakage, and leak Producing reason mainly has the following aspects：
(1) building deformation is excessive, be more than allow deformation range, mainly expand with heat and contract with cold and basis differential settlement.
(2) the rapid traverse that the inner corner trim of wall generates in the construction process, causes waterproof failure.
(3), due to phenomena such as not reaching compaction rate when casting concrete, producing loose, doghole, honeycomb, form The channel of percolating water.
(4) leak is caused to the destruction of waterproof in constructing.
It is worth noting that the information for being disclosed in the background technique is merely intended to increase the reason of the general background to the present invention Solution, and it is known to those skilled in the art existing to be not construed as recognizing or imply that the information is constituted in any form Technology.
Invention content
In order to solve the above technical problems, it is an object of the invention to propose a kind of back of the body that can carry out systematic treating seepage Water surface percolating water repairs technique.
Used technical solution is：
A kind of back side percolating water repairerment technique, includes the following steps：
S1. the brick wall for cutting back side building wall, cuts off height than upstream face ground decoration surface floor height 50-80mm, The 1/2-2/3 of thickness of wall body is cut off, construction part is formed；
S2. the surface galling of construction part；Interface waterproofing agent is brushed to base treatment；
S3. bar planting is carried out between the top brick body and lower concrete floor of construction part；
S4. support shuttering reserves grouting channel mouth；Expansion water-tight concrete progress structure is poured using mortar grouter to add Gu；
S5. form removal pours position and carries out curing conservation；
S6. internal corner part digs out " V " shape slot；
S7. interface waterproofing agent is brushed again to the surface of the construction part including " V " shape slot；
S8. " V " shape slot is sealed with waterproof gasket cement；
S9. inner corner trim is reinforced blocking using mending mortar, and is arc-shaped the gradient；
S10. brushing negative side waterproofing coating；
S11. cracking resistance mylar is added at the wall handing-over position at inner corner trim and top；
S12. brushing negative side waterproofing coating again；
S13. mending mortar is used to paint smooth；
S14. above ground portion uses wet mortar to be laid with ceramic tile after scraping glue for tile；
S15. metope part is scraped levelling using exterior wall putty painting charge.
Inventor has found that waterproof itself is mainly that structure is certainly anti-, percolating water occurs and illustrates that structure has been destroyed, waterproof Failure, to which water enters structure sheaf, if do not repaired in time to structure, structure long-time soaking water can reduce making for wall With the service life, increase security risk, maintenance cost in the future is higher.
The present invention solves the structure problem of core first, not only to the reinforcing of original structure, but also reaches new construction protection and prevents The function of leakage can increase service life, reduce security risk.
Then on material, it is preferable that the waterproof gasket cement is made of following component and parts by weight：
Preferably, the mending mortar is made of following component and parts by weight：
Preferably, the negative side waterproofing coating is made of powder and liquid material, and the weight ratio of powder and liquid material mixing is 2: 1,
Wherein powder is made of following component and parts by weight：
Liquid material is made of following component and parts by weight：
Preferably, the glue for tile is made of following component and parts by weight：
Preferably, the exterior wall putty coating is made of following component and parts by weight：
To sum up, the beneficial effects of the present invention are：
The present invention is combined by structure design using a variety of waterproof materials, and with technique, and system solves back side and oozes Seepy question.
Description of the drawings
Fig. 1 is a kind of repairerment structural schematic diagram that back side percolating water repairs that technique is related to.
Fig. 2 is the repairerment structural schematic diagram of the partial enlargement relative to Fig. 1.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in detail, but these exemplary embodiments Purposes and purpose are only used for enumerating the present invention, not constitute any type of any restriction to the real protection scope of the present invention, It is more non-that protection scope of the present invention is confined to this.
Shown in referring to Fig. 1 and Fig. 2, a kind of back side percolating water repairerment technique includes the following steps：
S1. cut back side building wall brick wall 10, cut off height than upstream face ground decoration surface floor height 80mm with On, the present embodiment 80mm；Cut off the 1/2-2/3 of thickness of wall body, the present embodiment 2/3；Form construction part；It is more preferable geographical The position of construction part is solved, original structure sheaf 100 is shown in Fig. 1.
S2. the surface galling of construction part；The interface waterproofing agent used below can be enable preferably to adhere to and be bonded in table On face；After being rinsed well with clear water, interface waterproofing agent 1 is brushed to base (i.e. the superficial layer of construction part) processing, is avoided Hollowing phenomenon generates；
S3. bar planting 2 is carried out between the top brick body and lower concrete floor of construction part；For example, by using 8@300* of φ 300mm reinforcing bars；
S4. support shuttering reserves grouting channel mouth；Expansion water-tight concrete 3 is poured using mortar grouter and carries out structure It reinforces；
S5. form removal pours position and carries out curing conservation；
S6. internal corner part digs out " V " shape slot 4；Such as wide 50mm depths 30mm；Then it is rinsed well with clear water；
S7. interface waterproofing agent 1 (second of brushing) is brushed again to the surface of the construction part including " V " shape slot 4；It applies The effect of brush interface waterproofing agent is：Not only waterproof action is played, but also plays the cementation made between base and waterproof gasket cement, It avoids generating hollowing phenomenon.The interface waterproofing agent of the step and step S3 are made of liquid and powder, and wherein powder is by such as the following group Divide and mass parts form：370-450 parts of waterproof glue；1-2 parts of antifoaming agent；1-2 parts of preservative；1-2 parts of wetting agent；Water 550- 630 parts；Powder is made of following component and mass parts：800-1000 parts of cement；400-600 parts of sand；400-600 parts of coarse whiting；Third 10-20 parts of olefin(e) acid rubber powder.Wherein raw material components can be obtained from city's mid-sales.In use, by liquid and powder, uniformly mixing is It can.Interface waterproofing agent that can be disclosed in the patent CN103030425B with further reference to applicant.
S8. " V " shape slot is sealed with waterproof gasket cement 5；The waterproof gasket cement can be made of following component and parts by weight：Third 2-4 parts of of 80-100 parts of olefin(e) acid lotion 10-15 parts of coarse whitings 3-5 parts of lignin fibres 2-4 parts of wetting dispersing agents silane coupling agents 0.5-1 parts of 4-6 parts of thickener and antifoaming agent.Wherein raw material components can be obtained from city's mid-sales.This waterproof gasket cement and interface Waterproofing agent compatibility is preferable, can generate preferable cementation between the two.
S9. inner corner trim is reinforced blocking using mending mortar 6, and is arc-shaped the gradient；The mending mortar is by following component and again Measure part composition：200-300 parts of sulphur aluminum water mud；200-300 parts of Portland cement；500-600 parts of quartz sand；Antifoaming agent 1-2 Part；2-4 parts of cellulose ether；1-2 parts of water-reducing agent；8-15 parts of rubber powder.Wherein rubber powder for example selects commercially available 6021E rubber powders.Raw material Component can be obtained from city's mid-sales.When using mending mortar, used with the stirring of proper amount of water according to actual conditions.
S10. brushing negative side waterproofing coating 7, such as thickness are 1.5mm thick, this is first；The negative side waterproofing coating It is made of powder and liquid material, the weight ratio of powder and liquid material mixing is 2:1, wherein powder is made of following component and parts by weight： 400-450 parts of Portland cement；400-450 parts of quartz sand；20-40 parts of sulphur aluminum water mud；100-150 parts of kaolin；Diminishing 6-10 parts of agent；1-3 parts of cellulose ether；Liquid material is made of following component and parts by weight：350-400 parts of acrylic emulsion；Antifoaming agent 2-4 parts；3-6 parts of preservative；600-650 parts of water.Each raw material component can be obtained in city's mid-sales：Such as water-reducing agent is using commercially available Three auspicious water-reducing agent SD-600P-01；Acrylic emulsion uses commercially available Li Wen first LWJ-711；Antifoaming agent uses the modest W086 of moral； Preservative uses ROHM AND HAAS LXE.
S11. cracking resistance mylar 8 is added at the wall handing-over position at inner corner trim and top；Mylar can increase the steady of structure Fixed and tensile strength.
S12. brushing negative side waterproofing coating 76 again, such as thickness are 1.5mm thick, this is second；
S13. use mending mortar 6 (second of use) painting smooth；The mending mortar of use can refer to using step S9 The mending mortar used；
S14. above ground portion uses wet mortar to be laid with ceramic tile 11 after scraping glue for tile 10；Porcelain is laid with using wet mortar wet-laid process Brick can prevent channeling water.The glue for tile is made of following component and parts by weight：350-450 parts of Portland cement；Quartz sand 550-600 parts；2-5 parts of cellulose ether；10-20 parts of rubber powder；1-5 parts of starch ether；4-8 parts of calcium formate.Wherein raw material components It is obtained with the mid-sales from city：Such as rubber powder is using precious occasion 6021E rubber powders.
S15. metope part is scraped levelling using exterior wall putty coating 12 batches.The exterior wall putty coating is by following component and weight Part composition：50-60 parts of heavy calcium carbonate；15-20 parts of talcum powder；5-10 parts of sierozem power；20-30 parts of cement；Hydroxyethyl methyl 1-2 parts of cellulose ether；2-4 parts of water-soluble resin rubber powder.Wherein raw material components can be obtained from city's mid-sales：Such as water-soluble tree Fat rubber powder uses commercially available CH-717 water-soluble resins rubber powder.Water-soluble resin rubber powder cohesive force is strong, can be with other raw material components It merges well.
This back side percolating water repairs waterproof comprehensive improvement after technique elder generation structure, and by said structure design, use is a variety of Waterproof material, and be combined with concrete technology, systematically solve back side leakage problem so that it can reach 10 years The above back side no longer percolating water.
The series of detailed descriptions listed above is illustrated only for possible embodiments of the invention, They are all without departing from equivalent embodiment made by technical spirit of the present invention or change not to limit the scope of the invention It should all be included in the protection scope of the present invention.

Claims (6)

1. a kind of back side percolating water repairs technique, which is characterized in that include the following steps：
S1. the brick wall for cutting back side building wall cuts off height than upstream face ground decoration surface floor height 80mm or more, cuts off The 1/2-2/3 of thickness of wall body forms construction part；
S2. the surface galling of construction part；Interface waterproofing agent is brushed to base treatment；
S3. bar planting is carried out between the top brick body and lower concrete floor of construction part；
S4. support shuttering reserves grouting channel mouth；Expansion water-tight concrete is poured using mortar grouter and carries out structural strengthening；
S5. form removal pours position and carries out curing conservation；
S6. internal corner part digs out " V " shape slot；
S7. interface waterproofing agent is brushed again to the surface of the construction part including " V " shape slot；
S8. " V " shape slot is sealed with waterproof gasket cement；
S9. inner corner trim is reinforced blocking using mending mortar, and is arc-shaped the gradient；
S10. brushing negative side waterproofing coating；
S11. cracking resistance mylar is added at the wall handing-over position at inner corner trim and top；
S12. brushing negative side waterproofing coating again；
S13. mending mortar is used to paint smooth；
S14. above ground portion uses wet mortar to be laid with ceramic tile after scraping glue for tile；
S15. metope part is scraped levelling using exterior wall putty painting charge.
2. back side percolating water according to claim 1 repairs technique, which is characterized in that the waterproof gasket cement is by as follows Component and parts by weight composition：
3. back side percolating water according to claim 1 repairs technique, which is characterized in that the mending mortar is by such as the following group Divide and parts by weight form：
4. back side percolating water according to claim 1 repairs technique, which is characterized in that the negative side waterproofing coating by Powder is formed with liquid material, and the weight ratio of powder and liquid material mixing is 2:1,
Wherein powder is made of following component and parts by weight：
Liquid material is made of following component and parts by weight：
5. back side percolating water according to claim 1 repairs technique, which is characterized in that the glue for tile is by following component It is formed with parts by weight：
6. back side percolating water according to claim 1 repairs technique, which is characterized in that the exterior wall putty coating is by such as Lower component and parts by weight composition：
CN201810119058.6A 2018-02-06 2018-02-06 Repairing process for leakage water on back water surface Active CN108374566B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109184003A (en) * 2018-09-25 2019-01-11 江苏四知堂工程服务有限公司 A kind of mattess waterproofing and leakage-stopping construction method
CN110318552A (en) * 2019-04-22 2019-10-11 杭州市园林工程有限公司 A kind of indoor wall percolating water repairerment technique
CN110344601A (en) * 2019-05-31 2019-10-18 浙江大唐国际绍兴江滨热电有限责任公司 Leakage of buildings blocks new process
CN111287339A (en) * 2020-03-03 2020-06-16 中国十七冶集团有限公司 Construction method for preventing and controlling rigid and flexible water leakage of brick-concrete structure
CN113045275A (en) * 2021-03-26 2021-06-29 中铁隧道局集团有限公司 Quick-setting cement-based permeable crystallization asphalt coating for water prevention of back water surface and preparation method thereof

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