EP0469353A1 - Revêtement pour la face extérieure des surfaces en béton armé - Google Patents

Revêtement pour la face extérieure des surfaces en béton armé Download PDF

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Publication number
EP0469353A1
EP0469353A1 EP19910111472 EP91111472A EP0469353A1 EP 0469353 A1 EP0469353 A1 EP 0469353A1 EP 19910111472 EP19910111472 EP 19910111472 EP 91111472 A EP91111472 A EP 91111472A EP 0469353 A1 EP0469353 A1 EP 0469353A1
Authority
EP
European Patent Office
Prior art keywords
cladding
holding means
reinforced concrete
area
elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19910111472
Other languages
German (de)
English (en)
Inventor
Günter Witte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WITTE, GUENTER
Original Assignee
Veba Kraftwerke Ruhr AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Veba Kraftwerke Ruhr AG filed Critical Veba Kraftwerke Ruhr AG
Publication of EP0469353A1 publication Critical patent/EP0469353A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F17/00—Vertical ducts; Channels, e.g. for drainage
    • E04F17/02—Vertical ducts; Channels, e.g. for drainage for carrying away waste gases, e.g. flue gases; Building elements specially designed therefor, e.g. shaped bricks or sets thereof
    • E04F17/026—Exterior cladding, e.g. of chimney parts extending above the roof; Rain covers for chimney tops without draught-inducing aspects

Definitions

  • the invention relates to a cladding for cleaned flue gas exposed reinforced concrete surfaces, in particular outer surfaces of the mouth area of reinforced concrete chimneys, consisting of several, covering the surface sealing plastic elements, in the overlap areas holding means are provided for fastening the cladding elements to the surface.
  • Reinforced concrete surfaces that are exposed to cleaned flue gases often show strong signs of concrete corrosion. This stems from the fact that flue gases which emerge from flue gas desulfurization plants or denitrification plants, in contrast to the uncleaned flue gases, have temperatures which are about 45 to 70 degrees lower, temperatures between 75 ° C. and 95 ° C. being usual. Due to the lower temperature but the higher degree of saturation of the cleaned flue gases, they condense on the surfaces that are exposed to them, especially in cold and inversion weather conditions. Such surfaces are, for example, the reinforced concrete outer surfaces in the mouth area of chimneys of power plants. The sulfuric acid formed by the condensation is very aggressive and leads to corrosion on the reinforced concrete.
  • a cladding for a chimney head standing on a building roof is known, which is designed in the form of a shaft casing.
  • the known cladding is composed of several complementary cladding elements. The connection between the cladding element or elements and the clad surface is achieved via holding means.
  • Another cladding is known from German utility model 7610724.
  • This cladding is provided for exhaust gas devices, in particular chimneys, and has a one-part or multi-part sleeve made of weather-resistant and heat-resistant plastic which surrounds the surface to be clad and completely encloses the surface to be clad.
  • the reason for the enclosing cladding is to prevent rainwater from penetrating into the upper region of the chimney without the need for expensive walling, grouting or plastering of the chimney.
  • Such cladding is associated with a comparatively high cost, since a suitable sleeve must be manufactured for each individual chimney.
  • DE-OS 2436834 discloses a chimney head cladding which, in accordance with the features mentioned at the outset, consists of a plurality of cladding elements which sealingly cover the surface to be clad and which can be produced, for example, from plastic.
  • the individual cladding elements are fastened to one another and to the surface to be clad by holding means.
  • the invention has for its object to provide a cladding that serves to protect cleaned flue gas exposed reinforced concrete surfaces and is optimized in terms of its corrosion resistance.
  • each cladding element consists of two plates of an a-olefin high polymer which are connected to the surface to be clad and are essentially the same in area, offset in height and offset from one another, the lower plate adjoining the cladding surface engaging means for has a holding means which is sealingly covered by the upper plate of the adjacent casing element. the upper plate of the adjacent cladding element is sealingly covered.
  • the solution according to the invention is characterized in that a closed encapsulation of the surface to be clad is created, the holding means also being encapsulated.
  • the size of the individual cladding elements used for the cladding can be chosen arbitrarily, since they can be assembled into cladding in any number.
  • the cladding elements can be preassembled in a more accessible place than the reinforced concrete surfaces, for example the outlet surfaces of reinforced concrete chimneys, generally represent. Because the cladding elements consist of an a-olefin high polymer, they are inexpensive to manufacture and are particularly characterized by good acid resistance.
  • plastic cladding elements are aesthetically much more sophisticated than the previous cladding. For example, these can be further developed in terms of color.
  • each individual cladding element is designed as a composite element, which consists of plates which, although offset from one another in terms of height and sides, are connected to one another over a surface, so that there are overlap regions in each case.
  • the overlapping areas are connected to one another in such a sealing manner that the protective surface formed by the individual cladding elements is continuously protected against corrosion around the reinforced concrete surface to be clad and on the other hand the holding means, which serve to fasten the individual cladding elements to the reinforced concrete surface, are also protected against corrosion in the covering area.
  • the cladding elements not only the surfaces as such are protected against corrosion but also the particularly susceptible holding means of the cladding elements.
  • the butt joints formed in the overlap area of the changing elements carry seals, on the one hand, the design of the butt joints results in the possibility of absorbing longitudinal expansion, on the other hand, the tightness of the cladding formed by the changing elements is maintained.
  • the seals are preferably replaced by sealing cords, so that their laying is particularly simple.
  • a practical embodiment of the holding means consists of designing them as screws / dowel connections, in particular using Allen screws.
  • the engagement means for the holding means carries a cover, by means of which the holding means can be sealed against the surface of the cladding element. This results in an additional seal in the area of the holding means.
  • a particularly effective type of additional sealing results from the fact that an asymmetrical toothing is provided in the lower plate in the area of the screw head, by means of which the plastic cover on the screw head can be positively locked.
  • the changing elements meet without an overlap area.
  • a holding means which penetrates both plates of the cladding element and is sealed with a corresponding cover is provided at such points.
  • Isotactic polypropylene is provided as the material for the execution of the cladding elements. This is a common material that is easy to shape and meets the temperature requirements.
  • the particular advantage of manufacturing technology is that the individual plates from which the changing elements are formed can be welded together by hot air.
  • such a polypropylene can be used, which is either filled with up to 20% with glass fiber or with up to 40% with talc.
  • the embodiment for the solution according to the invention relates to a corrosion min Changing cladding of the mouth area of reinforced concrete chimneys for power plants.
  • Figure 1 shows such a mouth area in cross section.
  • the upper part of the mouth area of the chimney 1 is provided with a covering 3 which surrounds the chimney shaft 2 in a sealing manner.
  • the cladding 3 is placed in the area around the cylindrical outer jacket of the chimney shaft 2 and in the area 111 it leads to the chimney head area.
  • FIG. 2 shows that the cladding 3 of the chimney head 2 consists of individual cladding elements that collide at overlap areas 4.
  • Each of the cladding elements consists of molded plastic plates 3a, 3b, which are made of isotactic polypropylene.
  • the plastic plates each forming a cladding element are shaped in accordance with the curvature of the outer surface of the chimney head 2.
  • the two plates 3a, 3b of the cladding element are welded or glued to one another over the largest area of their surfaces. The welding is preferably carried out with hot air.
  • the surfaces of the two plates 3a, 3b are connected in such a way that the two plates are offset from one another both in width and in height by a certain range. This area in each case forms an overlap area with the adjacent cladding element, so that overall a slate-like cladding of the chimney head 2 can be produced.
  • the lower of the two plates i.e. the plate 3a of the respective cladding element adjacent to the chimney head has openings provided as engagement means for a holding means, through which a screw 8 serving as holding means can be guided.
  • the screw 8 is preferably an Allen screw, so that it can be installed with an Allen key to save space.
  • the screw 8 is screwed into a dowel 7 which is let into a corresponding opening 6 in the chimney head 2.
  • Dowels 7 and Allen screw 8 thus form the holding means for each of the cladding elements 3a, 3b.
  • Sealing cords 11 are inserted at the joints between two adjacent cladding elements 3a, 3b, which on the one hand accommodate a length extension of the individual cladding elements 3a, 3b, but on the other hand also ensure that the entire cladding surrounding the chimney head 2 is sealed against the aggressive sulfuric acids.
  • the butt joints of the cladding elements 3a, 3b adjoining each other in the overlap areas 4 can also be sealed by hot air sealing welding.
  • the last connection of the cladding elements can be effectively sealed by the fact that the holding means formed by screw 8 and dowel 7 is exactly in the Area of the joint of both cladding elements is arranged.
  • the feed hole for the holding means passes through both plates 3a, 3b and, after attachment, like the other holding means, is also closed by a cover 10 inserted in a sawtooth-like area 9, so that the entry of the aggressive sulfuric acid is also prevented here .
  • Figure 7 finally shows the upper area of the cladding at the transition to the outlet for the flue gas from the chimney head.
  • the chimney head 2 is continued in a ceramic cover 2a in the head area.
  • Angled cladding elements 3a, 3b serve as cladding in this area, the closure of the cladding being formed by a holding means 8a, 7a which is not covered by an overlap area and which in principle is constructed in the same way as the holding means described.
  • the holding means 8a, 7a has, in addition to the cover 10a, a plastic cap 13, by means of which an effective seal is achieved at this particularly vulnerable point.
  • a permanently elastic joint 12 on the edge of the upper plate 3a located towards the inside of the chimney.
  • cooling towers In addition to the described embodiment, it is also conceivable that cooling towers, bridge pillars, television towers and other concrete plants with larger dimensions are clad in the same type of construction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chimneys And Flues (AREA)
EP19910111472 1990-07-31 1991-07-10 Revêtement pour la face extérieure des surfaces en béton armé Withdrawn EP0469353A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4024230 1990-07-31
DE19904024230 DE4024230A1 (de) 1990-07-31 1990-07-31 Verkleidung fuer stahlbetonaussenflaechen

Publications (1)

Publication Number Publication Date
EP0469353A1 true EP0469353A1 (fr) 1992-02-05

Family

ID=6411341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910111472 Withdrawn EP0469353A1 (fr) 1990-07-31 1991-07-10 Revêtement pour la face extérieure des surfaces en béton armé

Country Status (2)

Country Link
EP (1) EP0469353A1 (fr)
DE (1) DE4024230A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110860814A (zh) * 2019-11-14 2020-03-06 云南电网有限责任公司电力科学研究院 一种耐腐蚀混凝土分段杆及其制造方法
CN113185881A (zh) * 2021-05-10 2021-07-30 北京固斯特国际化工有限公司 一种针对混凝土烟囱的渗透反应型防腐材料及其应用

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2331436A (en) * 1942-03-31 1943-10-12 Staniforth Albert Victor Chimney, duct, and the like
DE2436834A1 (de) * 1974-07-31 1976-02-19 Ludwig Vetter Schornsteinkopfverkleidung
DE7610724U1 (de) * 1976-04-07 1977-03-17 Hoechst Ag, 6000 Frankfurt Verkleidung von Abgasvorrichtungen auf Dächern
DE3604145A1 (de) * 1986-02-10 1987-08-13 Schiedel Gmbh & Co Verkleidung, insbesondere eines schornsteinkopfes
DE8903701U1 (de) * 1989-03-23 1989-07-20 Köglsperger, Thomas, 8192 Geretsried Vorrichtung zur Halterung einer Abdeckung für einen Kamin
DE8910363U1 (de) * 1989-08-03 1989-12-28 Stahlgruber Otto Gruber GmbH & Co, 8000 MÜnchen Auskleidung von Wänden von Bunkern, Schurrenausläufen, Materialübergaben o.dgl.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7525658U (de) * 1975-08-13 1976-01-08 Diehm, Horst, 7710 Donaueschingen Verkleidung fuer schornsteinaussenwaende
DE2611255B2 (de) * 1976-03-15 1980-03-20 Ruberoidwerke Ag, 2000 Hamburg Verfahren und Vorrichtung zum Glätten und Anschmelzen der Ränder von thermoplastischen Abdichtungsbahnen
DE3136450A1 (de) * 1981-09-14 1983-03-24 Joachim 4500 Osnabrück Woker "fassaden- oder verblendplatte"
AT372137B (de) * 1982-03-31 1983-09-12 Rib Roof Dachprofile Ges M B H Bauplatte, insbesondere wandverkleidungsplatte
DE8514582U1 (de) * 1985-05-17 1985-06-27 Rütgerswerke AG, 6000 Frankfurt Nagelbares Dämmelement für Schindeln

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2331436A (en) * 1942-03-31 1943-10-12 Staniforth Albert Victor Chimney, duct, and the like
DE2436834A1 (de) * 1974-07-31 1976-02-19 Ludwig Vetter Schornsteinkopfverkleidung
DE7610724U1 (de) * 1976-04-07 1977-03-17 Hoechst Ag, 6000 Frankfurt Verkleidung von Abgasvorrichtungen auf Dächern
DE3604145A1 (de) * 1986-02-10 1987-08-13 Schiedel Gmbh & Co Verkleidung, insbesondere eines schornsteinkopfes
DE8903701U1 (de) * 1989-03-23 1989-07-20 Köglsperger, Thomas, 8192 Geretsried Vorrichtung zur Halterung einer Abdeckung für einen Kamin
DE8910363U1 (de) * 1989-08-03 1989-12-28 Stahlgruber Otto Gruber GmbH & Co, 8000 MÜnchen Auskleidung von Wänden von Bunkern, Schurrenausläufen, Materialübergaben o.dgl.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110860814A (zh) * 2019-11-14 2020-03-06 云南电网有限责任公司电力科学研究院 一种耐腐蚀混凝土分段杆及其制造方法
CN113185881A (zh) * 2021-05-10 2021-07-30 北京固斯特国际化工有限公司 一种针对混凝土烟囱的渗透反应型防腐材料及其应用
CN113185881B (zh) * 2021-05-10 2022-02-01 北京固斯特国际化工有限公司 一种针对混凝土烟囱的渗透反应型防腐材料及其应用

Also Published As

Publication number Publication date
DE4024230A1 (de) 1992-02-13

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