CN103774862B - A kind of construction method of renewal and reform of old hard water-proof roofing - Google Patents
A kind of construction method of renewal and reform of old hard water-proof roofing Download PDFInfo
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- CN103774862B CN103774862B CN201410032624.1A CN201410032624A CN103774862B CN 103774862 B CN103774862 B CN 103774862B CN 201410032624 A CN201410032624 A CN 201410032624A CN 103774862 B CN103774862 B CN 103774862B
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Abstract
The present invention relates to a kind of construction method of renewal and reform of old hard water-proof roofing, described construction method comprises the following steps: (1) base treatment; (2) thin portion repairs; (3) on-site maintenance; (4) spray-applied primer: adopt acrylic acid mortar class material as priming paint, directly brush in basic unit, or add the solvent naphtha of 1 ~ 2 times in primers, brush after stirring; (5) polyurethane water-proof layer is formed at primed surface blade coating single-component polyurethane water-proof paint; (6) brushing finish paint forms decoration topping: finish paint adopts aliphatic polyurethane material.The single-component high-solid content polyurethane water-proof paint adopted in construction method of the present invention is the application first in the transformation of hard roof retrofit, and the roofing not only good water-proof effect after renewal and reform of the present invention, and attractive in appearance.
Description
Technical field
The present invention relates to a kind of construction method monocomponent polyurethane being applied to the renewal and reform of old hard water-proof roofing.
Background technology
Monocomponent polyurethane is a kind of thick white shape liquid, without hazardous substancess such as TDI, for primary raw material with isocyanates MDI, PPG, be equipped with that various auxiliary agent and filler make through polyaddition reaction, waterproof matrix is coated on during use, the chemical reaction carried out after being contacted with the moisture in air by the-NCO end group in base polyurethane prepolymer for use as, can be formed tough and tensile, soft and without seam, the milky rubber waterproof film with excellent water resistance in substrate surface after reaction solidification.Specifically, monocomponent polyurethane has following characteristics:
(1) one-pack-type system, storage stability is good, without precipitation, on-the-spot plug and play, easy construction, the problems such as incomplete mixing when avoiding the construction of two Component System, proportioning are inaccurate.
(2) have good workability, can thickly be coated with, film is closely knit, free of pinholes, bubble-free; There is good levelability and thixotropy, easy construction, available brushing, roll, scraper plate construction.
(3) film performance is good, and film has rubber property, has excellent resilience, high strength, deep drawing quality, excellent ageing-resistant performance, can resist the chemical attack of routine, acid and alkali-resistance, corrosion-resistant, resistance toly goes mouldy, and low temperature performance excellent, heat resistance is good.
(4) without TDI composition, environment friendly and pollution-free, non-dangerous article, safe and reliable.
In prior art, the application of monocomponent polyurethane in waterproof, its basic unit mostly is the concrete surface of newly-built rigidity, as bridge, stadiums grandstand etc.But so far, yet there are no its application in old hard water-proof roofing renewal and reform.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of construction method monocomponent polyurethane being applied to the renewal and reform of old hard water-proof roofing
For solving above technical problem, the present invention adopts following technical scheme:
Monocomponent polyurethane is applied to a construction method for the renewal and reform of old hard water-proof roofing, described construction method comprises the following steps:
(1) base treatment:
A, the original layer that discharges water removed in basic unit; Root out the floating ash of substrate surface and most advanced and sophisticated projection; Circular arc is worn at negative and positive angle, pipe root position, and by dust, foreign material cleaning totally;
B, roofing to be slotted along parapet surrounding, PU high-pressure slip-casting in described groove, after drying in described groove brushing polymer cement waterproof paint, then in described groove, lay gutter and water introduced sewer pipe, then use cement mortar screeding;
C, in described basic unit, arrange stack by the spacing of (4 ~ 7) m × (4 ~ 7) m, described stack is inverted U stack, and its caliber is 3 ~ 6cm; The steam vent connecting portion of described stack carries out detailed treatment and extra play according to " Construction technology of roofing specification ";
D, cavity to substrate surface, honeycomb and crack first use non-shrink mortar floating, then use polymer mortar levelling, and the surface after process should be smooth, solid, clean, dry, reaches curing requirements;
(2) thin portion repairs:
A, in crack, the caulking material of seam and constuction joint place all brushing width 100 ~ 150mm, thickness 0.8 ~ 1.4mm, then on described crack, seam and constuction joint, paste the adhesives of width 20 ~ 25cm, thickness 0.8 ~ 1.4mm, and then carry out the construction of next procedure;
B, original for partitioning slot place waterproofing course and filler to be removed, then refill by all partitioning slot described in described caulking material, and adhesion width is greater than the adhesives of described partitioning slot width in described partitioning slot, and then carry out the construction of next procedure;
C, negative and positive angle, pipe root brushing caulking material;
(3) on-site maintenance: will protective treatment be carried out to non-spraying district involved around job site, block with protective cloth; To work plane the embedded part reserved to carry out big envelope process;
(4) spray-applied primer: adopt acrylic acid mortar class material as priming paint, directly brush in basic unit, or add the solvent naphtha of 1 ~ 2 times in primers, brush after stirring;
(5) polyurethane water-proof layer is formed at primed surface blade coating single-component polyurethane water-proof paint:
A, knife-coat application subregion complete, and during construction, blade coating is even, thickness is consistent, and a point multipass completes, and the interval time of adjacent twice is no less than 8 hours, and the direction often all over blade coating is vertical with the last direction all over blade coating, often has the sufficient time to solidify all over blade coating relief film;
B, for inside the surrounding of corner, spilled water hole, parapet and vertical plane wall first carry out blade coating, when carrying out recoat when being greater than the repainting time of coating manufacturer's recommended, should by the width of former coating along its edge direction hacking 15 ~ 20cm, surface is blown off with air, brush again or spraying one interbedded binding agent, then carry out blade coating;
The construction faying surface of C, secondary blade coating monocomponent polyurethane is designed to 20 ~ 25cm;
D, polyurethane water-proof layer thickness are not less than 1.8mm;
(6) brushing finish paint forms decoration topping: finish paint adopts aliphatic polyurethane material, and top coat layer thickness is not less than 0.2mm, and finish paint round brush is brushed at twice, and carries out after 24 hours completing blade coating polyurethane water-proof layer.
Described monocomponent polyurethane is aqueous one-component high solid content polyurethane water-repellent paint, meets the following conditions: solid content is greater than 95%, and hot strength is 2.0 ~ 2.5MPa, and elongation per unit length 600% ~ 800%, tearing strength is more than or equal to 15N/mm.
Described solvent naphtha is 100# solvent naphtha or 200# solvent naphtha.
Described caulking material is caulked joint ointment or the special fillet of foam.
Described adhesives is rubber water-proofing coiled or butyl rubber belt.
Due to the enforcement of technique scheme, the present invention compared with prior art tool has the following advantages:
Monocomponent polyurethane is applied in the renewal and reform of old hard water-proof roofing by the present invention first, has given full play to the advantage of single-component polyurethane water-proof paint, the not only good water-proof effect of the roofing after renewal and reform of the present invention, and attractive in appearance.
Detailed description of the invention
For the renewal and reform of Wang Gang 5# building, SGM's Pan Asia technique center water-proof roofing, the present invention will be further described in detail below, but the present invention is not limited to this embodiment.
Wang Gang 5# building, SGM's Pan Asia technique center is that hard concrete adds extruded sheet roof structure, roofing crackle is more, in partitioning slot, waterproof layer cracking is serious, lose due water-proof function, and roof vent pipe layout is less, because the many factors such as the sedimentation of building cause waterproofing materials serious cracking, lose the waterproof action originally had, waterproof maintaining need have been carried out to whole roofing.Be research and development centre, experimental center, office plant area below this roofing, amount to 6500 square meters.According to field inspection, the former Concrete Anti water layer on roofing has irregular cracking to stitch, and shrinkage joint is destroyed serious, and spilled water hole is in bad repair, and roofing present situation has had influence on the normal use of building and the image of owner.
In the present embodiment, by monocomponent polyurethane direct labor brushing (comprise inside gutter, parapet, below spilled water hole, unit etc.) in the Hard base layer that " old concrete+extruded sheet insulation layer " forms, reach not only waterproof but also effect attractive in appearance.
The present embodiment adopt base paint special, then brushing single-component polyurethane water-proof paint is as polyurethane water-proof layer, then with color be the aliphatic polyurethane material of RAL7035 water grey as top coat layer, same color.Concrete constructure scheme is as follows:
1. general technical of constructing requires:
Constructure scheme and work progress must meet " roofworks inspection of quality specification " (GB 50207-2002), " Technical code for roof engineering " (GB 50345-2004).
2. technical requirements for materials:
Monocomponent polyurethane material must meet " polyurethane water-proof paint " (GB/T 19250-2003); Limits of harmful substances meets JC1066-2008 " in building water-proof paint limits of harmful substances " " spray polyurea waterproofing tecnical regulations " (JGJ/T 200-2010) and other countries and industry current standard; The related request that top coat layer coating meets " the provisional technical condition of passenger dedicated railway line bridge concrete bridge floor spray polyurea waterproofing course ".
3. quality control overall plan:
1) all construction materials should possess product certificate and quality examination report, and raw material field sampling of marching into the arena detects the associated specifications that must meet country, local current art specification and this project.
2), in this project construction, to marching into the arena, material sampling makes type inspection totally 2 times; The sampling of the semiproduct and Site Detection that do simulated field amounts to 8 places (adhesion strength and thickness).Brushing time, place, position, existing roof style need be indicated to sampling sample.Site Detection, to concrete adhesion strength (drawing) >=0.4MPa, 6 places; Thickness sensitivity 10 place.After materials arrival, according to the inspection frequency, to material of marching into the arena according to lot number, production technology, quantity, carry out one type inspection, after qualified, can construct.According to the rules, according to different batches, physical property is carried out to material of marching into the arena and detects 3 times simultaneously.
3) strict implement subitem applies for checking and examination program, comprises base treatment, primary coat examination, polyurethane water-proof layer are checked and accepted, four the work itemss checked and accepted by finish paint.
4. construction technology process: mainly comprise the following steps:
(1) base treatment:
A, the original layer that discharges water removed in basic unit; Root out the floating ash of substrate surface and most advanced and sophisticated projection; Circular arc is worn at negative and positive angle, pipe root position, and by dust, foreign material cleaning totally;
B, roofing to be slotted along parapet surrounding, PU high-pressure slip-casting in described groove, after drying in described groove brushing polymer cement waterproof paint, then in described groove, lay gutter and water introduced sewer pipe, then use cement mortar screeding;
C, in described basic unit, arrange stack by the spacing of (4 ~ 7) m × (4 ~ 7) m, described stack is inverted U stack, and its caliber is 3 ~ 6cm, and stack has two gas outlets, and two gas outlets, are beneficial to exhaust all down; The steam vent connecting portion of described stack carries out detailed treatment and extra play according to " Construction technology of roofing specification ".The reason arranging stack is: roofing causes thermal insulation pool retaining due to partitioning slot and crack, after being discharged by gutter, still moisture is had in thermal insulation pool, moisture flashes to steam and alters toward outer everywhere, once after whole roofing done waterproof, whole roofing will " be covered ", and steam cannot be discharged, and strength time one length of steam outburst will destroy ready-made waterproofing course.
D, cavity to substrate surface, honeycomb and crack first use non-shrink mortar floating, then use polymer mortar levelling, and the surface after process should be smooth, solid, clean, dry, reaches curing requirements;
(2) thin portion repairs:
A, in crack, the caulking material of seam and constuction joint place all brushing width 100 ~ 150mm, thickness 0.8 ~ 1.4mm, then on described crack, seam and constuction joint, paste the adhesives of width 20 ~ 25cm, thickness 0.8 ~ 1.4mm, and then carry out the construction of next procedure;
B, original for partitioning slot place waterproofing course and filler to be removed, then refill by all partitioning slot described in described caulking material, and adhesion width is greater than the adhesives of described partitioning slot width in described partitioning slot, and then carry out the construction of next procedure;
C, negative and positive angle, pipe root brushing caulking material;
In above-mentioned, caulking material used is caulked joint ointment or the special fillet of foam; Adhesives used is rubber water-proofing coiled or butyl rubber belt.
(3) on-site maintenance: will protective treatment be carried out to non-spraying district involved around job site, block with protective cloth; To work plane the embedded part reserved to carry out big envelope process;
(4) spray-applied primer: adopt acrylic acid mortar class material as priming paint, directly brush in basic unit, or add the solvent naphtha of 1 ~ 2 times in primers, brush after stirring.The effect of priming paint mainly contains: one is occur bubbling and pin-hole phenomena after avoiding polyurethane coating brushing; Two is the effects can playing cementing agent, improves the adhesive power of the ground such as polyurethane coating and hard concrete, improves protection effect.The performance of the primary coat of current polyurethane roofing construction and the performance of interbedded binding agent basically identical, so process monocomponent polyurethane Coating combination problem time, direct brushing primary coat is as interbedded binding agent.Above-mentioned solvent naphtha is 100# solvent naphtha or 200# solvent naphtha.
(5) polyurethane water-proof layer is formed at primed surface blade coating single-component polyurethane water-proof paint: described monocomponent polyurethane is aqueous one-component high solid content polyurethane water-repellent paint, meet the following conditions: solid content is greater than 95%, hot strength is 2.0 ~ 2.5MPa, elongation per unit length 600% ~ 800%, tearing strength is more than or equal to 15N/mm.
Before A, formal brushing, first should brush one piece of 500 mm × 500 mm size at the construction field (site), print that thickness is not less than 1.5 mm, carry out presentation quality evaluation by site operation chief technology officer and keep sample for future reference.After appearance of coat quality reaches requirement, start brushing operation.
B, knife-coat application subregion complete, and during construction, blade coating is even, thickness is consistent, and a point multipass completes, and the interval time of adjacent twice is no less than 8 hours, and the direction often all over blade coating is vertical with the last direction all over blade coating, often has the sufficient time to solidify all over blade coating relief film;
C, for inside the surrounding of corner, spilled water hole, parapet and vertical plane wall first carry out blade coating, when carrying out recoat when being greater than the repainting time of coating manufacturer's recommended, should by the width of former coating along its edge direction hacking 15 ~ 20cm, surface is blown off with air, brush again or spraying one interbedded binding agent, then carry out blade coating;
The construction faying surface of D, secondary blade coating monocomponent polyurethane is designed to 20 ~ 25cm;
E, polyurethane water-proof layer thickness are not less than 1.8mm;
(6) brushing finish paint forms decoration topping: finish paint adopts aliphatic polyurethane material, and top coat layer thickness is not less than 0.2mm, and finish paint round brush is brushed at twice, and carries out after 24 hours completing blade coating polyurethane water-proof layer.Color is canescence.
5. check and accept
Roofing after renovation i.e. waterproof but also attractive in appearance, produces a desired effect.
Above to invention has been detailed description; its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; and the invention is not restricted to the embodiments described; the equivalence change that all Spirit Essences according to the present invention are done or modification, all should be encompassed within protection scope of the present invention.
Claims (5)
1. a construction method for the renewal and reform of old hard water-proof roofing, is characterized in that, described construction method comprises the following steps:
(1) base treatment:
A, the original layer that discharges water removed in basic unit; Root out the floating ash of substrate surface and most advanced and sophisticated projection; Circular arc is worn at negative and positive angle, pipe root position, and by dust, foreign material cleaning totally;
B, roofing to be slotted along parapet surrounding, PU high-pressure slip-casting in described groove, after drying in described groove brushing polymer cement waterproof paint, then in described groove, lay gutter and water introduced sewer pipe, then use cement mortar screeding;
C, in described basic unit, arrange stack by the spacing of (4 ~ 7) m × (4 ~ 7) m, described stack is inverted U stack, and its caliber is 3 ~ 6cm; The steam vent connecting portion of described stack carries out detailed treatment and extra play according to " Construction technology of roofing specification ";
D, cavity to substrate surface, honeycomb and crack first use non-shrink mortar floating, then use polymer mortar levelling, and the surface after process should be smooth, solid, clean, dry, reaches curing requirements;
(2) thin portion repairs:
A, in crack, the caulking material of seam and constuction joint place all brushing width 100 ~ 150mm, thickness 0.8 ~ 1.4mm, then on described crack, seam and constuction joint, paste the adhesives of width 20 ~ 25cm, thickness 0.8 ~ 1.4mm, and then carry out the construction of next procedure;
B, original for partitioning slot place waterproofing course and filler to be removed, then with described caulking material, all described partitioning slot are refilled, and adhesion width is greater than the adhesives of described partitioning slot width in described partitioning slot, and then carry out the construction of next procedure;
C, negative and positive angle, pipe root brushing caulking material;
(3) on-site maintenance: will protective treatment be carried out to non-spraying district involved around job site, block with protective cloth; To work plane the embedded part reserved to carry out big envelope process;
(4) spray-applied primer: adopt acrylic acid mortar class material as priming paint, directly brush in basic unit, or add the solvent naphtha of 1 ~ 2 times in primers, brush after stirring;
(5) polyurethane water-proof layer is formed at primed surface blade coating single-component polyurethane water-proof paint:
A, knife-coat application subregion complete, and during construction, blade coating is even, thickness is consistent, and a point multipass completes, and the interval time of adjacent twice is no less than 8 hours, and the direction often all over blade coating is vertical with the last direction all over blade coating, often has the sufficient time to solidify all over blade coating relief film;
B, for inside the surrounding of corner, spilled water hole, parapet and vertical plane wall first carry out blade coating, when carrying out recoat when being greater than the repainting time of coating manufacturer's recommended, should by the width of former coating along its edge direction hacking 15 ~ 20cm, surface is blown off with air, brush again or spraying one interbedded binding agent, then carry out blade coating;
The construction faying surface of C, secondary blade coating monocomponent polyurethane is designed to 20 ~ 25cm;
D, polyurethane water-proof layer thickness are not less than 1.8mm;
(6) brushing finish paint forms decoration topping: finish paint adopts aliphatic polyurethane material, and top coat layer thickness is not less than 0.2mm, and finish paint round brush is brushed at twice, and carries out after 24 hours completing blade coating polyurethane water-proof layer.
2. the construction method of the renewal and reform of old hard water-proof roofing according to claim 1, it is characterized in that, described monocomponent polyurethane is aqueous one-component high solid content polyurethane water-repellent paint, meet the following conditions: solid content is greater than 95%, hot strength is 2.0 ~ 2.5MPa, elongation per unit length 600% ~ 800%, tearing strength is more than or equal to 15N/mm.
3. the construction method of the renewal and reform of old hard water-proof roofing according to claim 1, is characterized in that, described solvent naphtha is 100# solvent naphtha or 200# solvent naphtha.
4. the construction method of the renewal and reform of old hard water-proof roofing according to claim 1, is characterized in that, described caulking material is caulked joint ointment or the special fillet of foam.
5. the construction method of the renewal and reform of old hard water-proof roofing according to claim 1, is characterized in that, described adhesives is rubber water-proofing coiled or butyl rubber belt.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105040917A (en) * | 2015-07-29 | 2015-11-11 | 北京中联天盛建材有限公司 | Method for energy-saving environment-friendly waterproof construction of existing roof |
| CN105019677A (en) * | 2015-07-29 | 2015-11-04 | 北京中联天盛建材有限公司 | Energy-saving and environment-friendly type waterproof and thermal preservation construction method of existing roof |
| CN105155784A (en) * | 2015-10-28 | 2015-12-16 | 苏州奥莱鑫建材有限公司 | Construction method for roof waterproof coating |
| TWI614443B (en) * | 2016-10-11 | 2018-02-11 | 楊詠植 | Drainage device and installation method thereof |
| CN107100380B (en) * | 2017-05-15 | 2019-06-18 | 江阴正邦化学品有限公司 | Old roof waterproof renovation method and exposed conveying appliance weather resisting colorful water-repellent paint used |
| CN109723232A (en) * | 2018-12-03 | 2019-05-07 | 广州民鑫建设有限公司 | A kind of roofing anti-leakage treatment method |
| CN110528789A (en) * | 2019-07-27 | 2019-12-03 | 广东中南建设有限公司 | A kind of roof waterproof engineering construction method |
| CN112227755A (en) * | 2020-09-03 | 2021-01-15 | 深圳市科顺一零五六技术有限公司 | Waterproof repairing structure and method for old roof |
| CN113738153A (en) * | 2021-09-13 | 2021-12-03 | 通号工程局集团有限公司 | Construction method for waterproof renovation of railway metal roof |
| CN114635585A (en) * | 2022-01-28 | 2022-06-17 | 北京东方雨虹防水技术股份有限公司 | Waterproof, renovating and decoration integrated construction method for old tile roof |
| CN114961329A (en) * | 2022-07-08 | 2022-08-30 | 江苏朗科建材科技有限公司 | Construction process for repairing old waterproof of concrete roof by adopting polyurea protection |
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| KR20020083340A (en) * | 2001-04-27 | 2002-11-02 | 임기채 | Method for carrying out water-proof on roof of house |
| CN2565886Y (en) * | 2002-08-29 | 2003-08-13 | 罗荣才 | Roof thermo-insulated water-proof covering plate |
| KR100737619B1 (en) * | 2006-10-20 | 2007-07-09 | 이연희 | The water proof method of the construction structure, and, the waterproof structure |
| CN100467814C (en) * | 2007-12-28 | 2009-03-11 | 中设建工集团有限公司 | Anti-leakage construction process for inclined roof |
| CN201738507U (en) * | 2010-06-13 | 2011-02-09 | 湖南大学 | Roof heat insulating device |
| CN201865259U (en) * | 2010-12-03 | 2011-06-15 | 吉林省志惠防腐保温工程有限公司 | Roof polyurethane composite heat insulating and waterproof system |
| KR101066146B1 (en) * | 2011-06-16 | 2011-09-20 | 주식회사 에스아이켐 | Environmental friendly epoxy nanocomposite waterproof coating agent waterproof construction method |
| CN102312582B (en) * | 2011-07-12 | 2013-04-03 | 江苏天誉建材检验有限公司 | Construction method for applying polyurea to old flexible waterproof roof for renovation transformation |
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