EP0575076A1 - Abdichtung für Dehnungsfugen - Google Patents

Abdichtung für Dehnungsfugen Download PDF

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Publication number
EP0575076A1
EP0575076A1 EP93304336A EP93304336A EP0575076A1 EP 0575076 A1 EP0575076 A1 EP 0575076A1 EP 93304336 A EP93304336 A EP 93304336A EP 93304336 A EP93304336 A EP 93304336A EP 0575076 A1 EP0575076 A1 EP 0575076A1
Authority
EP
European Patent Office
Prior art keywords
jaws
waterstop
section
connector according
strip
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.)
Granted
Application number
EP93304336A
Other languages
English (en)
French (fr)
Other versions
EP0575076B1 (de
Inventor
Ian James Moffat
Yutaka Kawahara
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.)
Fosroc International Ltd
Sanyo Chemical Industries Ltd
Original Assignee
Fosroc International Ltd
Sanyo Chemical Industries 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 Fosroc International Ltd, Sanyo Chemical Industries Ltd filed Critical Fosroc International Ltd
Publication of EP0575076A1 publication Critical patent/EP0575076A1/de
Application granted granted Critical
Publication of EP0575076B1 publication Critical patent/EP0575076B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 waterstop connectors for joining together a waterstop of non-water swellable material such as plasticised polyvinyl chloride and a waterstop of a water swellable material.
  • Waterstops are used at joints in concrete structures to prevent the passage of water. Early waterstops were made from steel or copper strip, the latter often crimped to give greater flexibility. Composites of rubber with mild steel plates projecting from the rubber were also used. More recently strips of flexible water proof material, having two or more keying ribs extending along and projecting from the strip for keying the strip to the concrete at the two sides of the joint to be sealed have been used. Such waterstops are commonly made of a rubber or plastics material and the most widely used material is at present plasticised polyvinyl chloride. Even more recently waterstops of a hydrophilic or water swellable material have come into commercial use.
  • waterstops rely on the swelling capacity of the material on contact with water to prevent the passage of water at joints or discontinuities in a concrete structure.
  • Materials which are used for water swellable waterstops include water swellable polyurethane elastomers, a combination of butyl rubber and sodium bentonite and rubber containing particles of a water swellable resin.
  • Water swellable or hydrophilic waterstops are unsuitable for use in expansion joints in concrete wall or floor structures because the rate and magnitude of movement of the structures exceed the performance of the water swellable or hydrophilic material.
  • waterstops of non-water swellable material such as plasticised polyvinyl chloride or rubber at expansion joints and it is therefore necessary to provide some means of joining the two types of waterstop together to form a watertight joint.
  • Waterstops of non-water swellable material such as plasticised polyvinyl chloride or rubber are of two types, one usually called an internal waterstop or centrally placed waterstop having ribs or projections on two opposite faces of the strip and the other usually called an external waterstop or a rear fixed waterstop having ribs or projections on one face only.
  • the present invention relates to connectors for both internal or centrally placed waterstops and external or rear fixed waterstops.
  • a waterstop connector for joining together two waterstops, one of a non-water swellable material and the other of a water swellable material
  • the connector comprising a strip of flexible water swellable material having an open end comprising a pair of jaws interconnected by a throat, each of the jaws having a contact surface having a profile such that the jaws may be located around and contact a rib on a waterstop of non-water swellable material.
  • the contact surface of the jaws comprises two interconnecting sections, the first section adjacent the open end of the strip having a flat or preferably a substantially convex surface and the second section comprising a notch, and the throat is recessed to maximise the opening capacity of the jaws.
  • the jaws of such a connector are suitable for contacting a rib on one face of an external or rear fixed waterstop of non-water swellable material.
  • the contact surface of the jaws comprises four interconnecting sections, the first section adjacent the open end of the strip having a flat or preferably substantially convex surface, the second section comprising a notch, the third section having a flat surface and the fourth section having a substantially concave surface.
  • the connector of the preferred embodiment is suitable for making connections to both external or rear fixed waterstops and internal or centrally placed waterstops.
  • Water stops usually have flanges at each end to prevent tearing through when the waterstop is fixed to concrete by nails hammered through the waterstop just inside the flanges. All of the contact surfaces of the jaws can be utilised to locate the jaws around and contact an end flange and two opposite ribs of a centrally placed waterstop, while the first and second sections can be utilised to locate the jaws around and contact a rib of a rear fixed waterstop.
  • Non-water swellable waterstops of rubber or polyvinyl chloride commonly have bulb shaped ribs, and the preferred embodiment of the invention is particularly adapted to location on and connection to such ribs.
  • the two surfaces may be parallel with each other or alternatively they may be such that the gap between them flares out towards the open end of the strip.
  • the notched surface of the second section may be a V-shaped notch or a substantially U-shaped notch.
  • the flat contact surfaces of the third sections of the jaws are preferably parallel with each other.
  • the surface of the throat is preferably arcuate and the surfaces of the fourth sections interconnect with the throat to form a substantially circular surface.
  • the water swellable material which is used to make the waterstop connector may be for example a rubber or flexible plastics material containing dispersed particles of a water swellable resin but the preferred material is a polyurethane elastomer which is produced preferably from an aliphatic or alicyclic polyisocyanate as an isocyanate component and which is rendered water-swellable due to the presence of hydrophilic groups within its chemical structure.
  • a polyurethane elastomers show a stable swelling ratio in water containing metallic ions and the ratio does not decrease in a long period of time, so that they show an excellent water stop effect.
  • Such polyurethane elastomers are sold under the trade mark AQUAPRENE by Sanyo Chemical Industries, and are produced having a range of degrees of swelling and rate of swelling when in contact with water.
  • Such polyurethane elastomers one which has a swelling ratio of 1.2 - 2.5 times, is preferable.
  • the strip of flexible water swellable material may have embedded in it spring steel wire in order to improve the performance of the connector by enhancing the ability of the connector to make contact with the ribs of the non water-swellable waterstop.
  • the same effect may be achieved by forming the strip as a laminate of two water swellable materials, one being harder than the other.
  • the other end of the connector can be linked to a waterstop of water swellable by means of an adhesive bonding agent and the connector can be fixed to the concrete by nailing or by means of an adhesive bonding agent.
  • the jaws of the connector come into contact with water in use the connector material swells and a water impermeable seal is formed around the rib.
  • a waterstop connector consists of a strip 1 of flexible water swellable polyurethane elastomer having an open end 2 comprising a pair of jaws 3, 4, interconnected by a throat 5, each of the jaws 3, 4 having a contact surface 6.
  • the contact surface 6 is made up of four sections, the first section adjacent the open end 2 having a convex surface 7, the second section having a U-shaped notch 8, the third section having a flat surface 9 and the fourth section having a concave surface 10.
  • a concrete wall 11 has an expansion joint 12 filled with closed cell joint filler sealed with an elastomeric sealant.
  • Two sections of water swellable polyurethane elastomer waterstop 13, 14 are located on the upper surface of the wall 11, one on each side of the joint 12 and are fixed into position by adhesively bonding or nailing.
  • a plasticised polyvinyl chloride waterstop 15 having four bulb shaped ribs 16, a central flat top box 17 to allow movement to be accommodated in the joint and to provide a seating to support the joint filler and end flanges 18 is located vertically at the rear of the wall 11.
  • Two waterstop connectors 19, 20 of the type illustrated in Figures 1 and 2 are located on the wall 11 so that the contact surfaces of the jaws 3,4 of each of the strips 1 are located around and contact a bulb shaped rib 16 on the polyvinyl chloride waterstop 15 and the closed ends 21, 22 of the connectors 19, 20 abut waterstop sections 13, 14.
  • the connectors 18, 19 are fixed in position, on the wall 11 by adhesive bonding.
  • a plasticised polyvinyl chloride waterstop 23 is centrally placed across an expansion joint 24 filled with closed cell joint filler sealed with an elastomeric sealant in a concrete wall 25.
  • the waterstop 23 has a central bulb 26 of hexagonal design, end flanges 27 and four ribs 28 on each face 29 of the waterstop 23.
  • Two waterstop connectors 30, 31 of the type illustrated in Figures 1 and 2 are placed on the wall 25 so that the contact surfaces of the jaws 3, 4 are located around and contact end flange 27 and ribs 28.
  • the closed ends 32, 33 of the connectors 30, 31 abut waterstop sections 34, 35 of water swellable polyurethane elastomer located on the wall 25 in line with waterstop 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
EP19930304336 1992-06-18 1993-06-03 Abdichtung für Dehnungsfugen Expired - Lifetime EP0575076B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929212964A GB9212964D0 (en) 1992-06-18 1992-06-18 Waterstop connectors
GB9212964 1992-06-18

Publications (2)

Publication Number Publication Date
EP0575076A1 true EP0575076A1 (de) 1993-12-22
EP0575076B1 EP0575076B1 (de) 1998-12-23

Family

ID=10717334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930304336 Expired - Lifetime EP0575076B1 (de) 1992-06-18 1993-06-03 Abdichtung für Dehnungsfugen

Country Status (6)

Country Link
EP (1) EP0575076B1 (de)
JP (1) JP2678255B2 (de)
AU (1) AU662414B2 (de)
DE (1) DE69322692D1 (de)
GB (1) GB9212964D0 (de)
SG (1) SG49707A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1953326A1 (de) * 1969-10-23 1971-04-29 Schulte Stemmerk Kg Abdichtung fuer Dehnungsfugen
DE9202319U1 (de) * 1992-02-22 1992-06-11 Hiendl, Heribert, 8440 Straubing, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175507U (ja) * 1983-05-12 1984-11-24 旭電化工業株式会社 止水構造
GB2208881A (en) * 1987-08-19 1989-04-19 Grace W R Ltd Waterstops for concrete with longitudinal and transverse ribs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1953326A1 (de) * 1969-10-23 1971-04-29 Schulte Stemmerk Kg Abdichtung fuer Dehnungsfugen
DE9202319U1 (de) * 1992-02-22 1992-06-11 Hiendl, Heribert, 8440 Straubing, De

Also Published As

Publication number Publication date
EP0575076B1 (de) 1998-12-23
DE69322692D1 (de) 1999-02-04
JP2678255B2 (ja) 1997-11-17
SG49707A1 (en) 1998-06-15
AU3988493A (en) 1993-12-23
JPH06322845A (ja) 1994-11-22
GB9212964D0 (en) 1992-07-29
AU662414B2 (en) 1995-08-31

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