EP0297730A1 - Dichtstreifen - Google Patents

Dichtstreifen Download PDF

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Publication number
EP0297730A1
EP0297730A1 EP88305036A EP88305036A EP0297730A1 EP 0297730 A1 EP0297730 A1 EP 0297730A1 EP 88305036 A EP88305036 A EP 88305036A EP 88305036 A EP88305036 A EP 88305036A EP 0297730 A1 EP0297730 A1 EP 0297730A1
Authority
EP
European Patent Office
Prior art keywords
waterstop
concrete
strips
water swellable
seal
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Withdrawn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
EP88305036A
Other languages
English (en)
French (fr)
Inventor
Timothy John Martin
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.)
GCP Products UK Ltd
Original Assignee
WR Grace Ltd
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 WR Grace Ltd filed Critical WR Grace Ltd
Publication of EP0297730A1 publication Critical patent/EP0297730A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6807—Expansion elements for parts cast in situ
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
    • E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
    • E01C11/10—Packing of plastic or elastic materials, e.g. wood, resin
    • E01C11/106—Joints with only prefabricated packing; Packings therefor
    • 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
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6806—Waterstops
    • 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
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B2001/6818—Joints with swellable parts

Definitions

  • This invention relates to waterstops.
  • Waterstops are extruded or moulded sections of rubber or other flexible moisture proof materials, such as plastics material such as polyvinyl chloride, which are used to prevent the passage of moisture or water through the joints which are provided in concrete structures such as floors, bases and walls when such structures are formed in successively cast sections.
  • plastics material such as polyvinyl chloride
  • Waterstops of the so-called internal type are conventional structures having enlarged formations at or near both longitudinal edges, or having projections on both faces. These allow the waterstop to be anchored in the concrete so as to bridge the gap between adjacent bodies which are poured in situ, so that it is not pulled out when the concrete bodies move apart as they inevitably will in time and with the change of weather and seasons.
  • the waterstops have to be of strong flexible material in order to withstand such movement without tearing out or rupturing. In practice about half the waterstop is first cast into and secured in the first formed body of concrete defining a joint, and subsequently the other half of the waterstop is cast in the adjacent, subsequently cast concrete body.
  • a second type of waterstop is the so called external type the subject inter alia British Patent No. 1008811 in which keying formations are provided on only one face of the waterstop so that the waterstop spans one longitudinal edge of a concrete joint. Single or double sets of keying formations are provided on respective sides of the longitudinal centre line of the waterstop. In the finished structure the waterstop is on the external face of the construction, spanning the gap between the adjacent concrete bodies.
  • an aim of the present invention is to provide improved waterstops.
  • a waterstop having a body comprising an elongate web with a keying formation at or near each edge of the web by which the waterstop may be secured in adjacent respective bodies of concrete so as to seal the gap between such bodies, and on each side of the longitudinal centre line, a strip of water swellable material attached to the waterstop body and positioned so as to engage the concrete and effective in use to improve the seal between the waterstop and concrete in the event of water or moisture penetration.
  • the waterstop body will normally be an extruded or moulded section of rubber or other moisture and water resistant flexible plastics material, preferably plasticised polyvinylchloride.
  • the strips of water swellable material may be arranged so as themselves to expand to contact the concrete and provide the improved seal. Alternatively or in addition they may be arranged so that upon expansion they urge another part of the waterstop body to form an improved seal with the concrete.
  • the strips may be mechanically attached to the waterstop body being for instance received in a reentrant groove in the waterstop.
  • Such strips can be attached in the web provided that the web is thick enough to accommodate a groove without being unduly weakened, or may be attached to a groove formed in the web area with an additional part of the cross section. Normally the mechanical attachment will be continuous and coextensive with the strips, though this is not always essential.
  • the strips may be provided on one of the keying formations, which take the form of enlargements such as rounded enlargements and in particular enlargements such that the waterstop takes the dumb-bell configuration.
  • the waterstop is of the external type having keying formations upon only one face the strips of water swellable material can again be on the web or on the projections, for instance at the top of the projections or keying formations.
  • the water swellable strips are provided on the keying formations of either type of waterstop, they may be arranged such that upon swelling they cause adjacent parts of the waterstop to move into more close sealing engagement with surrounding concrete.
  • water swellable strips are mechanically attached to the waterstop body it may be preferable for them to be removable and readily reattached to the web or keying formations. This is particularly advantageous where welding of sections of waterstop, either longitudinally or more commonly at an angle, is required. It will be appreciated that in most concrete constructions the walls meet each other at right angles or other angles and the corresponding waterstops need to be joined in a completely water tight network, normally by welding. A continuous or substantially continuous water swellable strip will also of course be desirable in such situations.
  • the water swellable strips may be adhered to the web or keying formations of the waterstop body.
  • the water swellable strips can be on the keying formations, for instance the tops of the projections in external waterstops or the outsides of the enlarged keying formations in internal ones.
  • location on the web may be appropriate, in which case it is preferably not close to the keying formations, particularly with internal waterstops, in case the pressure of the strip weakens the concrete near the critical area where the keying formations seal most firmly against the concrete.
  • the present invention provides a concrete joint with such a waterstop embedded in the respective parts of the concrete.
  • the invention provides a method of providing such a concrete joint in which the waterstop is first embedded in a first concrete body and subsequently in a second formed concrete body so as to span the joint or gap between the two parts of concrete. Further the invention provides such a method wherein the concrete joint is in parts which have corners between them. For this, the sections of waterstop are welded together, and where the waterstop is of the type with a water swellable strip which is detachable the welding takes place with such strip removed and the strip is subsequently reattached.
  • Plasticised polyvinylchloride is a preferred material for the bodies of waterstops of the invention, because welding is easily and effectively performed.
  • Alternative materials include chlorinated polyethylene and rubber.
  • the swellable materials may be any of a variety of materials such as are commercially available. Such materials commonly comprise a rubber or flexible plastic component with a water swellable component, such as of bentonite or a water swellable plastic material such as polyacrylic acid.
  • a rubber or flexible plastic component with a water swellable component, such as of bentonite or a water swellable plastic material such as polyacrylic acid.
  • the strips could be preformed, for instance formed in a liquid system from hot melt or solution, or formed in situ.
  • the present invention thus provides, in a simple, cheap and easily controlled manner, a waterstop improved by a provision of a water swellable strip on each side to improve sealing in the event of moisture or water penetration.
  • the invention can be applied to a full range of waterstops with little investment and thus relatively small increase in price.
  • the water swellable strips can be added off line, that is to say subsequent to the extrusion of the water stop body. This will allow better control and the economical production due to reduced rejection and scrap.
  • the adhesion or mechanical attachment proposals do not involve any restriction on the materials which can be selected for the water swellable material such as might arise were there possibility of interaction in the liquid state in a co-extrusion situation.
  • the advantage of the water swellable strip being temporarily removable if mechanically attached has been mentioned, and this applies both to on site welding and to factory welded fabrications.
  • the waterstop has a body comprising a web such as is indicated at 10 and enlargements or keying formations of one of two general types.
  • the first type as shown for instance in Figure 1 is a swelling at the margin of the waterstop and is indicated by the numeral 11.
  • Figures 1 to 3 and 14 to 16 thus show internal waterstops, to be buried away from the surface of the concrete bodies involved in a concrete joint.
  • FIGs 4 to 7 and 17 to 20 show external waterstops, which have projecting keying formations such as 19 on one face only. These waterstops are for attachment to the surfaces of the two concrete bodies involved in the concrete joint, with the keying formations on each side of the longitudinal centre line of the waterstop being respectively gripped by the concrete in the two bodies.
  • FIGs 1 to 7 and, for the adhesively applied strips Figures 14 to 20, show a non-exclusive selection of waterstop bodies the features of which will be briefly described.
  • Figures l and 14 show a simple dumb-bell waterstop merely having a bulb or enlargement 11 along each edge.
  • the Figures l and 14 waterstops can be used for construction joints, where the two masses of concrete are encouraged to bind to each other, or in contraction joints where, although the masses are distinct they are close to each other and movement between them is expected.
  • Figures 2 and 15 show a modification, for an expansion joint. Such a joint occurs where the two concrete bodies are separate from each other, and the gap between them is filled with a joint filler of some description.
  • the Figures 2 and 15 embodiment has a central flexible bulb 12 therefore to be at the centre of the joint at the gap between the bodies.
  • the Figure 3 and 16 embodiment has a flange 13 outboard of the keying formation 11 which may be penetrated with means to hold the waterstop in place prior to pouring concrete.
  • FIG. 5 shows the provision of central flexible ribs 15 on the same side of the waterstop as the keying formations. This portion is adapted to have shuttering placed upon it while the first side of the waterstop is embedded in the concrete. The ribs prevent seepage of grout under the shuttering and across to the other side of the waterstop.
  • Figures 6 and 19 shows a flange 16 outwards of the outer keying formation 9 on each side. This can be used to fix the waterstop by nails against shuttering prior to the pouring of concrete, with the waterstop then being penetrated only at a point outside the keying formations.
  • Figures 7 and 20 show an embodiment appropriate for an expansion joint, with a flexible central portion 17 to be received in the gap between the bodies of concrete.
  • the water swellable strips 20 as shown in Figures 1 and 14 these can be located on the outer sides of the keying formations.
  • Figures 2 and 15 show an alternative position involving two strips on each formation 11 and on opposite faces of the waterstop.
  • Figures 3 and 15 show an embodiment where the strips of swellable material are on the web between the enlargements. In Figure 16 they are located relatively close to the centre line of the waterstop, and further from the keying formations for reasons described below. In Figure 3 they are offset to reduce the strength loss which may occur in the web when the water swellable strips 20 are received in grooves. Any of the suggested positionings for the water swellable material strips may be used with any of the various types of waterstop of the internal and the external types.
  • the strips of the water swellable material are at the top of at least one and perhaps both keys on each side of the centre line of the waterstop.
  • Figures 5 and 18 show embodiments where the water swellable material is located at the part of the keying formations where these narrow down towards the web, and where normally close contact and sealing between the waterstop and the concrete bodies is expected.
  • the strips are placed on lower parts of the keying formations.
  • Figures 7 and 20 they are placed in the web and on particular between the keying formations on each side, although of course there may be only one keying formation on each side.
  • Figures 4 and 17 may show the most appropriate locations for the water swellable strip.
  • the waterstop to concrete seal is most effective at the sides of the keying formations, particularly where they broaden out from the base. It is thought that locating the potential additional sealing agent elsewhere might be most appropriate.
  • a possible disadvantage in the Figures 7 and 20 construction may be that on swelling the strips will tend to push the waterstop away from the concrete bodies.
  • Figures 8 to 11 show possible sections of water swellable material for mechanical attachment but by no means as exclusive disclosure.
  • the section is circular and is received in a recess slightly greater than semi-circular in size, so as to project above the surface of what in this case is shown as the upper part of a keying formation of the type used with an external waterstop.
  • the particular sections and mode of attachment can be applied to the other positions proposed for the water swellable material.
  • Figure 9 a section having a reentrant base received in a slot has a domed top offering ample material to be available to expand and create a seal.
  • Figure 10 is a more simple section shown as being slightly reentrant on one side, but conceivably merely being rectangular provided that sufficient resistance to removal although not too much resistance is available.
  • Figure 11 the material is designed particularly to cause sideways expansion of the base material of the waterstop .
  • additional sealing will take place between the waterstop body and the concrete as well as between the water swellable material and the concrete.
  • Figures 12 and 13 show alternative forms where the water swellable material is primarily designed to move a lip or flange of the main body of the waterstop so as to improve the sealing effect.
  • Figure 13 shows how this could be employed in the web.
  • the option of removing the mechanically fastened swellable materials may be particularly useful where such materials are not weldable, being for instance rubber based.
  • Many water swellable materials currently available are of that type and thus have that disadvantage. Accordingly, to avoid material being burnt during the welding operation leading to weakness, it is best to remove them on welding.
  • a continuous angled channel for the water swellable material should result and the water swellable material can then be reinserted, either in a continuous manner with an angle in it, or conceivably by the material being cut and a butt or mitre joint between sections provided. Welding is easier and more effective with the swellable material removed and out of the way. In the event of factory formed joints the water swellable material could be applied before or after the joint section has been created.
  • the adhesive attachment is continuous and coextensive with the strips, though this is not always essential.
  • Figures 21 to 23 are further embodiments.
  • water swellable material is applied to both edges of one keying formation on each side.
  • such application could be to the other one, or to both, on each side, and this disposition of swellable material is also useful where there is one keying formation on each side.
  • the water swellable material is applied at the roots of the keying formations. When located here, they will, on swelling, tend to tighten the keying formation in the concrete, by putting it under tension, thus improving the seal made at the top of the keying formation.
  • the water swellable material is deposited as a layer onto the waterstop.
  • pre-formed strips can be applied by adhesion.
  • FIG. 23 A mechanical attachment in a similar place is shown in Figure 23.
  • the keying formation is broadened at its root so as to permit formation of a re-entrant groove into which a key shaped end of a strip of water swellable material can be received.
  • water swellable materials suitable for all embodiments are: Adeka Ultra Seal, a water swellable rubber, Series KCH sold by Asahi Denka Kogyo KK of Tokyo, and Sumikagel GRC-VCL-3B sold by Sumitomo Chemical Co Ltd of Osaka, Japan.
  • the water swellable material may be covered with a known water or alkali penetrable or soluble coating.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)
EP88305036A 1987-06-03 1988-06-02 Dichtstreifen Withdrawn EP0297730A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8712998 1987-06-03
GB08712998A GB2205872A (en) 1987-06-03 1987-06-03 Waterstops with water-swellable edge regions

Publications (1)

Publication Number Publication Date
EP0297730A1 true EP0297730A1 (de) 1989-01-04

Family

ID=10618316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88305036A Withdrawn EP0297730A1 (de) 1987-06-03 1988-06-02 Dichtstreifen

Country Status (3)

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EP (1) EP0297730A1 (de)
DK (1) DK301088A (de)
GB (1) GB2205872A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996022429A1 (de) * 1995-01-18 1996-07-25 Agrar Chemie Ag. Dichtungsvorrichtung zum abdichten von betonfugen
EP1741846A1 (de) * 2005-07-08 2007-01-10 Sika Technology AG Fugenband
CN108457682A (zh) * 2017-04-01 2018-08-28 丰泽智能装备股份有限公司 一种管道系统及其施工方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256445B (en) * 1991-06-04 1994-12-07 Grace W R & Co Waterstops
CH687998A5 (it) * 1992-04-24 1997-04-15 Sunisala Anstalt Elemento profilato per la realizzazione di opere idrauliche ed altre opere del genio civile.
SG49349A1 (en) * 1992-06-18 1998-05-18 Fosroc International Ltd Method of joining waterstops and connector for use therein
DE9302711U1 (de) * 1993-02-25 1993-04-08 Firma Rolf Pflieger, 7046 Gäufelden Fugenblech für Betonwandungen
US5349797A (en) * 1993-04-29 1994-09-27 The Dow Chemical Company Joint liquid stop
NO180210C (no) * 1993-11-10 1997-03-05 Habberstad As Ing B Anordning for tetning av stöpeskjöter
DE9420037U1 (de) 1994-12-14 1995-02-02 Dexel, Thomas, Dr., 80997 München Fugenband
IT1279338B1 (it) * 1995-07-28 1997-12-09 Volteco Spa Barriera anti-acqua particolarmente per opere in calcestruzzo
GB9816365D0 (en) 1998-07-28 1998-09-23 Fosroc International Ltd Waterstops and a method for their installation
DE102017220915A1 (de) 2017-11-23 2019-05-23 Maurer Engineering Gmbh Fugendichtprofil, Bauwerksfugenüberbrückungsvorrichtung und Verfahren zum Herstellen eines Fugendichtprofils

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5761138A (en) * 1980-09-30 1982-04-13 Bridgestone Tire Co Ltd Water stopping plate
EP0219296A1 (de) * 1985-10-07 1987-04-22 C.I. Kasei Co., Ltd Dichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5761138A (en) * 1980-09-30 1982-04-13 Bridgestone Tire Co Ltd Water stopping plate
EP0219296A1 (de) * 1985-10-07 1987-04-22 C.I. Kasei Co., Ltd Dichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAPANESE PATENTS GAZETTE, Section Ch: Chemical, week E20, class A, page 18, no. 40727, Derwent Publications Ltd, London, GB; & JP-A-57 061 138 (BRIDGESTONE TIRE K.K.) 13-04-1982 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996022429A1 (de) * 1995-01-18 1996-07-25 Agrar Chemie Ag. Dichtungsvorrichtung zum abdichten von betonfugen
AU698238B2 (en) * 1995-01-18 1998-10-29 Agrar Chemie Ag. Sealing device for concrete joints
EP0922814A3 (de) * 1995-01-18 1999-06-30 Agrar Chemie AG Dichtungsvorrichtung zum Abdichten von Betonfugen
EP1741846A1 (de) * 2005-07-08 2007-01-10 Sika Technology AG Fugenband
WO2007006743A1 (de) * 2005-07-08 2007-01-18 Sika Technology Ag Fugenband
JP2009500545A (ja) * 2005-07-08 2009-01-08 シーカ・テクノロジー・アーゲー 止水板
CN108457682A (zh) * 2017-04-01 2018-08-28 丰泽智能装备股份有限公司 一种管道系统及其施工方法
CN108457682B (zh) * 2017-04-01 2023-09-26 丰泽智能装备股份有限公司 一种管道系统及其施工方法

Also Published As

Publication number Publication date
GB2205872A (en) 1988-12-21
DK301088D0 (da) 1988-06-02
DK301088A (da) 1988-12-04
GB8712998D0 (en) 1987-07-08

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