EP2593617B1 - Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure - Google Patents
Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure Download PDFInfo
- Publication number
- EP2593617B1 EP2593617B1 EP11730960.9A EP11730960A EP2593617B1 EP 2593617 B1 EP2593617 B1 EP 2593617B1 EP 11730960 A EP11730960 A EP 11730960A EP 2593617 B1 EP2593617 B1 EP 2593617B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plug
- stem
- opening
- seal
- seal element
- 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.)
- Active
Links
- 239000004567 concrete Substances 0.000 title claims description 21
- 239000000463 material Substances 0.000 claims description 30
- 238000000926 separation method Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 11
- 239000005060 rubber Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000013536 elastomeric material Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 230000008961 swelling Effects 0.000 description 7
- 239000013013 elastic material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 150000001298 alcohols Chemical class 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 229920005862 polyol Polymers 0.000 description 5
- 150000003077 polyols Chemical class 0.000 description 5
- 125000002947 alkylene group Chemical group 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 125000006353 oxyethylene group Chemical group 0.000 description 3
- 229920005749 polyurethane resin Polymers 0.000 description 3
- 150000005846 sugar alcohols Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 description 2
- 125000005702 oxyalkylene group Chemical group 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920005996 polystyrene-poly(ethylene-butylene)-polystyrene Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- HEBKCHPVOIAQTA-QWWZWVQMSA-N D-arabinitol Chemical compound OC[C@@H](O)C(O)[C@H](O)CO HEBKCHPVOIAQTA-QWWZWVQMSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 239000004386 Erythritol Substances 0.000 description 1
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical group 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- BXOUVIIITJXIKB-UHFFFAOYSA-N ethene;styrene Chemical group C=C.C=CC1=CC=CC=C1 BXOUVIIITJXIKB-UHFFFAOYSA-N 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 150000002513 isocyanates Chemical group 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
Images
Classifications
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/0644—Plug means for tie-holes
Definitions
- the present invention concerns a plug for sealing an opening in a concrete structure, in particular an opening of a separation portion of the concrete structure, said plug comprising a stem with a base at the distal end and a seat defining a frontal end of the stem accommodating a seal element that is designed as a cap like body enveloping the frontal end of the stem, wherein the seal element is manufactured in a material having a lower hardness than the stem, whereby the stem is made of an impact resistant synthetic material and a free space is defined between the distal end of the seal element and the frontal end of the base.
- DE 34 33 575 does disclose all the features of the preamble of claim 1.
- the present invention meets this demand by providing a specifically designed plug for sealing an opening of a separation portion in a concrete structure.
- the present invention concerns a plug for sealing an opening in a concrete structure, in particular an opening of a separation portion of the concrete structure according to claim 1.
- the present invention also concerns a kit of parts comprising a separation portion protection tube and one or more plugs as identified here above.
- the seal element is preferably manufactured in an elastomeric material, having a hardness of 90 Shore A or lower.
- the elastomeric material is a moisture swellable material.
- Said free space preferably has a width (D) corresponding to or larger than the displacement of the material of the seal element when inserting the plug with its frontal side in an opening.
- the seal element comprises a cap like body enveloping the frontal end of the stem of the plug. The plug is inserted and left in the opening to be sealed.
- Figure 1 represents a plug according to the present invention, the plug 1 comprising a stem 2 with a base 3 at the distal end and a seal element 4 provided on the stem 2, frontal of said base 3.
- the seal element 4 is manufactured in a material having a lower hardness than the stem 2.
- the stem 2 and base 3 are preferably manufactured as a single piece in a rigid synthetic and impact resistant material such as polyethylene; polypropylene or polyamide. It is preferred that the impact resistant material has an E-modulus ranging between 250 and 3000 MPa.
- the stem 2 is provided with a seat 5 for accommodating the seal element.
- This seat is defined by the frontal end 6 of the stem 2 and allows preventing sliding of the seal element 4 over the stem when introducing the plug in an appropriate opening to be sealed.
- the seat 5 is further defined by one or more axial grooves 7 or rims provided in or on the stem.
- the base 3 is preferably a flat disc extending in a plane perpendicular to the stem.
- the distal surface 8 of the base can either be flat or slightly bulged outwardly and serves as a surface for hammering the plug in an opening.
- the base comprises one or more radially extending rings 16 that are slightly inclined from the base to their outer perimeter towards the distal end of the plug 1. These rings have cross sectional dimensions substantially equal to cross sectional dimensions (A) of the opening (typically a diameter (A) of 21,5 to 22 mm) to be sealed and are an integral part of the stem 2 and base 3 and allow fixation of the plug into an opening.
- the seal element 4 can be either a separate piece to be assembled on the stem or can be molded on the stem 2.
- a free space 10 is defined between the distal end 11 of the seal element 4 and the frontal end 12 of the base.
- This free space 10 has preferably a width (D) corresponding to or larger than the displacement of the material of the seal element 4 when inserting the plug with its frontal side in an opening.
- the free space 10 is preferably defined in that the diameter of the plug at the distal end 11 of the seal element is larger than the diameter of the plug along a portion of the plug immediately distal of the seal element 4.
- the seal element 4 is designed as a cap like body enveloping the frontal end 6 of the stem 2, whereby rims 9 or grooves are provided at the inner surface of the cap which cooperate with the above mentioned rims or grooves 7 on the stem to prevent rotation of the seal element in view of the stem 2 and to support the seal element 4.
- the seal element 4 is preferably manufactured in an elastomeric material having a hardness of 90 Shore A or lower, for example a thermoset rubber such as styrene-ethylene/butylene-styrene (SEBS) or styrene-ethylene/propylene-styrene (SEPS) rubbers.
- SEBS styrene-ethylene/butylene-styrene
- SEPS styrene-ethylene/propylene-styrene
- the seal element according to the invention comprises moisture swellable materials to increase the sealing function of the plug.
- the combination of a rigid stem with a softer seal element and a free space is defined between the distal end of the seal element and the frontal end of the base allows providing a plug with a guaranteed air pressure resistance and a water pressure resistance of 5 bar or more.
- moisture swellable materials that can be used for the seal element 4 include acryl, vinyl and inorganic moisture swelling resins. It is particularly preferable to use a flexible material containing moisture swelling polyurethane which comprises a mixture of a moisture swelling polyurethane resin, and for example, natural, synthetic or reclaimed rubber, therefor.
- Such a flexible material as described above may be obtained by kneading one or more polyether polyols of the following general formula: R[(OR)n]p
- polyhydric alcohol examples include dihydric alcohols such as ethylene glycol and propylene glycol; trihydric alcohols such as glycerol and trimethylolpropane; tetrahydric alcohols such as erythritol and pentaerythritol; pentahydric alcohols such as arabitol and xylitol; and hexahydric alcohols such as sorbitol and mannitol.
- dihydric alcohols such as ethylene glycol and propylene glycol
- trihydric alcohols such as glycerol and trimethylolpropane
- tetrahydric alcohols such as erythritol and pentaerythritol
- pentahydric alcohols such as arabitol and xylitol
- hexahydric alcohols such as sorbitol and mannitol.
- Said polyether polyols may be obtained by adding alkylene oxide(s) to these polyhydric alcohols in such a manner as to give the desired molecular weight. Either random or block addition may be employed therefor. When the content of the oxyethylene groups is less than 20%, the resulting material is unsatisfactory as a moisturestop material. Any polyisocyanates may be employed. The content of the terminal isocyanate groups may be 1 to 12%, preferably 2 to 7%.
- Example of said crosslinking agent include polyols and polyamines each carrying two to six active hydrogen atoms per molecule and has an average molecular weight per active hydrogen atom of 30 to 15000, for example, low-molecular weight polyols, addition polymers of low-molecular weight polyols and alkylene oxides and addition polymers of low-molecular weight polyamines and alkylene oxides, as well as mixtures thereof.
- the flexible material as described above contains 20 to 800 parts of moisture swelling polyurethane resin per 100 parts of the rubber.
- preferable flexible materials are those obtained by further adding hydraulic material(s) to a composition comprising said moisture swelling polyurethane resin and rubber.
- available hydraulic materials include Portland cement, blast furnace cement, colloidal cement and gypsum. It is preferable to employ a curing accelerator for cement comprising calcium aluminate simultaneously therewith.
- a flexible material comprising such a hydraulic material has an advantage that it shows little shrinkage when dried. It is preferable that the hydraulic material is blended in an amount of 20 to 30 parts per 100 parts of the mixture of the moisture swelling polyurethane and rubber.
- the above flexible material may further contain appropriate moisture absorbing material(s).
- the moisture absorbing materials include those mainly comprising an alpha, beta-unsaturated compound, which carries one or more carboxyl groups or those capable of being derived thereto such as carboxyl, carboxylate, carboxylic imide, carboxylic amide or carboxylic anhydride groups per molecule, and optionally polymerized with other alpha, beta.-unsaturated compound(s) and/or modified with isocyanate(s).
- moisture absorbing resin examples include conventional moisture absorbing polymers such as starch-acrylic acid graft copolymer, a salt of styrene/maleic anhydride copolymer, crosslinked poly(sodium acrylate), vinyl ester/ethylenically unsaturated carboxylic acids, and saponified products or derivatives thereof.
- conventional moisture absorbing polymers such as starch-acrylic acid graft copolymer, a salt of styrene/maleic anhydride copolymer, crosslinked poly(sodium acrylate), vinyl ester/ethylenically unsaturated carboxylic acids, and saponified products or derivatives thereof.
- the flexible material may be further vulcanized with the use of a crosslinking agent such as sulfur.
- composition of the flexible material may be controlled in such a manner as to give a moisture swelling ratio of the resulting molded article of 10 to 350%, still preferably 40 to 250%.
- Figure 4 represents the plug 1 when inserted with its frontal end first in an opening 13 of a separation portion protection tube 14 of a concrete structure 15, the base 3 abutting the outer surface of the concrete structure around the opening 13.
- Fig. 5 represents an embodiment of the plug 1, which is not part of the invention, wherein the stem 2 and in particular the seat 5 of said stem is provided with a shoulder portion 17 at which the cross-sectional diameter of the stem 2 decreases towards the frontal end of the stem 2.
- the seal element 4 comprises a shoulder portion 18 at which the cross sectional diameter of the seal element decreases towards its frontal end.
- the cross sectional diameter D2 of said seal element distal of the shoulder portion is preferably larger than the cross sectional diameter D3 of the stem frontal of the shoulder portion.
- the seal is hereby detachably provided over the stem.
- This plug has the advantage that it can be inserted in protection tubes of different diameters, in particular protection tubes having an inner diameter corresponding to the circumferential diameter of the plug distal of the shoulder portion of the seal (large diameter) and protection tubes having an inner diameter corresponding to the circumferential diameter of the plug frontal of the shoulder portion 18 of the seal (small diameter).
- the seal can be fitted in the protection tube by first cutting away the distal end of the seal element at the shoulder portion 18 and only providing the frontal end of the seal element on the stem to allow insertion of the plug in the protection tube as represented in figure 6 .
- the remaining ring 19 of the seal element can be slid over the outer surface of the protection tube to provide anti-leakage at the protection tube's circumference.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
- Sealing Material Composition (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Description
- The present invention concerns a plug for sealing an opening in a concrete structure, in particular an opening of a separation portion of the concrete structure, said plug comprising a stem with a base at the distal end and a seat defining a frontal end of the stem accommodating a seal element that is designed as a cap like body enveloping the frontal end of the stem, wherein the seal element is manufactured in a material having a lower hardness than the stem, whereby the stem is made of an impact resistant synthetic material and a free space is defined between the distal end of the seal element and the frontal end of the base.
- It is well known to seal an opening of a separation portion in a concrete structure with a plug or the like. The French patent application
FR 2.742.784 EP 0.288.583 disclose a plug made in a rigid material that is provided with a ring(s) of moisture swellable elastic material surrounding a section of the plug. When the plug is introduced in an opening of a separation portion, the ring(s) of moisture swellable elastic material will allow a sealing contact between the rigid material of the plug and the inner wall of the opening, thereby preventing water from entering the opening in the concrete structure. The plugs described in both above mentioned prior art documents can be introduced in an opening by use a hammer alone, without the need for any special equipment. - An inconvenience of the known plugs is that the ring of moisture swellable elastic material deforms due to friction with the inner walls of the opening when hammering the plug in that opening of the concrete structure. The friction results in a creep of the elastic material over the rigid core of the plug, thereby increasing the outer diameter of the plug and increasing the force needed to introduce the plug in the opening. As this type of plugs has an outer diameter that is slightly larger than the inner diameter of the opening of the separation portion in the concrete structure to ensure a tight fit and to prevent accidental removal of the plug, a further increase of the plug diameter will make it impossible to introduce the plug in the opening or will result in damaging the ring of elastic material at introduction of the plug in the opening, thereby potentially disrupting the seal between the plug and the inner wall of the opening.
DE 20 2009 004865 andDE 34 33 575 describe a plug comprising a fiber reinforced concrete inner core with a seal element of elastic material. - Furthermore,
DE 34 33 575 does disclose all the features of the preamble ofclaim 1. - It has been observed that the type of plug, such as discloses by
DE 20 2009 004865 , is inconvenient for hammering the plug into in opening of a concrete structure due to the fact that the core of the plug is damaged during hammering, which can result in insufficient support of the seal element that as such is not forced against the inner sidewall of the opening in the concrete structure. Hence no sealing of the opening is guaranteed when using plugs with a concrete inner core. - It is clear from the above that there remains a demand for a technical solution which not only ensures tight sealing of the opening of separation portions in concrete structures but which is also easy to apply without the need for any equipment but a hammer, and to prevent rotation of the seal element in view of the stem.
- The present invention meets this demand by providing a specifically designed plug for sealing an opening of a separation portion in a concrete structure.
- The present invention concerns a plug for sealing an opening in a concrete structure, in particular an opening of a separation portion of the concrete structure according to
claim 1. - The present invention also concerns a kit of parts comprising a separation portion protection tube and one or more plugs as identified here above.
- The seal element is preferably manufactured in an elastomeric material, having a hardness of 90 Shore A or lower. According to the invention, the elastomeric material is a moisture swellable material. By this particular plug composition with a rigid stem and a softer seal element and with a free space is defined between the distal end of the seal element and the frontal end of the base, a plug can be obtained allowing to seal an opening at high pressure.
- Said free space preferably has a width (D) corresponding to or larger than the displacement of the material of the seal element when inserting the plug with its frontal side in an opening.
- According to the invention, the seal element comprises a cap like body enveloping the frontal end of the stem of the plug. The plug is inserted and left in the opening to be sealed.
-
-
Figure 1 represents a exploded side view of a plug according to the present invention; -
Figure 2 represents an perspective view of a plug according to the present invention; -
Figure 3 represents a view according to arrow P3 infigure 1 ; -
Figure 4 schematically represents a plug according to the present invention when inserted in an opening of a separation portion in a concrete structure. -
Figure 5 represents an exploded side view of an embodiment of the plug, which is not part of the present invention; -
Figure 6 schematically represents the plug according tofigure 5 when inserted in an opening of a separation portion in a concrete structure. -
Figure 1 represents a plug according to the present invention, theplug 1 comprising astem 2 with abase 3 at the distal end and aseal element 4 provided on thestem 2, frontal ofsaid base 3. - According to the present invention, the
seal element 4 is manufactured in a material having a lower hardness than thestem 2. - The
stem 2 andbase 3 are preferably manufactured as a single piece in a rigid synthetic and impact resistant material such as polyethylene; polypropylene or polyamide. It is preferred that the impact resistant material has an E-modulus ranging between 250 and 3000 MPa. - As represented in
figure 2 , thestem 2 is provided with aseat 5 for accommodating the seal element. This seat is defined by thefrontal end 6 of thestem 2 and allows preventing sliding of theseal element 4 over the stem when introducing the plug in an appropriate opening to be sealed. - According to the invention, the
seat 5 is further defined by one or moreaxial grooves 7 or rims provided in or on the stem. - The
base 3 is preferably a flat disc extending in a plane perpendicular to the stem. Thedistal surface 8 of the base can either be flat or slightly bulged outwardly and serves as a surface for hammering the plug in an opening. Optionally, the base comprises one or more radially extendingrings 16 that are slightly inclined from the base to their outer perimeter towards the distal end of theplug 1. These rings have cross sectional dimensions substantially equal to cross sectional dimensions (A) of the opening (typically a diameter (A) of 21,5 to 22 mm) to be sealed and are an integral part of thestem 2 andbase 3 and allow fixation of the plug into an opening. The advantage of theserings 16 is that the plug can be fixed in an opening with a resistance up to 5 bar of water pressure or ambient pressure, without being forced out of the opening. Hence, theseal element 4 can have a pure sealing function without being affected by the pressure in the opening the plug is sealing. - The
seal element 4 can be either a separate piece to be assembled on the stem or can be molded on thestem 2. - According to the invention, a
free space 10 is defined between thedistal end 11 of theseal element 4 and thefrontal end 12 of the base. Thisfree space 10 has preferably a width (D) corresponding to or larger than the displacement of the material of theseal element 4 when inserting the plug with its frontal side in an opening. Thefree space 10 is preferably defined in that the diameter of the plug at thedistal end 11 of the seal element is larger than the diameter of the plug along a portion of the plug immediately distal of theseal element 4. - According to the invention, the
seal element 4 is designed as a cap like body enveloping thefrontal end 6 of thestem 2, wherebyrims 9 or grooves are provided at the inner surface of the cap which cooperate with the above mentioned rims orgrooves 7 on the stem to prevent rotation of the seal element in view of thestem 2 and to support theseal element 4. - The
seal element 4 is preferably manufactured in an elastomeric material having a hardness of 90 Shore A or lower, for example a thermoset rubber such as styrene-ethylene/butylene-styrene (SEBS) or styrene-ethylene/propylene-styrene (SEPS) rubbers. - The seal element according to the invention comprises moisture swellable materials to increase the sealing function of the plug. The combination of a rigid stem with a softer seal element and a free space is defined between the distal end of the seal element and the frontal end of the base allows providing a plug with a guaranteed air pressure resistance and a water pressure resistance of 5 bar or more.
- Examples of moisture swellable materials that can be used for the
seal element 4 include acryl, vinyl and inorganic moisture swelling resins. It is particularly preferable to use a flexible material containing moisture swelling polyurethane which comprises a mixture of a moisture swelling polyurethane resin, and for example, natural, synthetic or reclaimed rubber, therefor. - Such a flexible material as described above may be obtained by kneading one or more polyether polyols of the following general formula:
        R[(OR)n]p
- wherein R represents a polyhydric alcohol residue; (OR) represents a polyoxyalkylene chain comprising oxyalkylene groups each having an oxyethylene group and an alkylene group carrying three or four carbon atoms, provided that the content of the oxyethylene groups amounts to 20 to 100% of the total molecular weight;
- n is a number corresponding to the degree of polymerization of the oxyalkylene groups and giving a hydroxyl group equivalent of 200 to 2500; and p is a number of 2 to 8, preferably 2 to 4; together with urethane polymer(s) having polyisocyanate groups, a crosslinking agent and the rubber as defined above followed by curing.
- Examples of said polyhydric alcohol include dihydric alcohols such as ethylene glycol and propylene glycol; trihydric alcohols such as glycerol and trimethylolpropane; tetrahydric alcohols such as erythritol and pentaerythritol; pentahydric alcohols such as arabitol and xylitol; and hexahydric alcohols such as sorbitol and mannitol.
- Said polyether polyols may be obtained by adding alkylene oxide(s) to these polyhydric alcohols in such a manner as to give the desired molecular weight. Either random or block addition may be employed therefor. When the content of the oxyethylene groups is less than 20%, the resulting material is unsatisfactory as a moisturestop material. Any polyisocyanates may be employed. The content of the terminal isocyanate groups may be 1 to 12%, preferably 2 to 7%.
- Example of said crosslinking agent include polyols and polyamines each carrying two to six active hydrogen atoms per molecule and has an average molecular weight per active hydrogen atom of 30 to 15000, for example, low-molecular weight polyols, addition polymers of low-molecular weight polyols and alkylene oxides and addition polymers of low-molecular weight polyamines and alkylene oxides, as well as mixtures thereof.
- It is preferable that the flexible material as described above contains 20 to 800 parts of moisture swelling polyurethane resin per 100 parts of the rubber.
- Other examples of preferable flexible materials are those obtained by further adding hydraulic material(s) to a composition comprising said moisture swelling polyurethane resin and rubber. Examples of available hydraulic materials include Portland cement, blast furnace cement, colloidal cement and gypsum. It is preferable to employ a curing accelerator for cement comprising calcium aluminate simultaneously therewith. A flexible material comprising such a hydraulic material has an advantage that it shows little shrinkage when dried. It is preferable that the hydraulic material is blended in an amount of 20 to 30 parts per 100 parts of the mixture of the moisture swelling polyurethane and rubber.
- The above flexible material may further contain appropriate moisture absorbing material(s). Examples of the moisture absorbing materials include those mainly comprising an alpha, beta-unsaturated compound, which carries one or more carboxyl groups or those capable of being derived thereto such as carboxyl, carboxylate, carboxylic imide, carboxylic amide or carboxylic anhydride groups per molecule, and optionally polymerized with other alpha, beta.-unsaturated compound(s) and/or modified with isocyanate(s).
- Examples of such a moisture absorbing resin include conventional moisture absorbing polymers such as starch-acrylic acid graft copolymer, a salt of styrene/maleic anhydride copolymer, crosslinked poly(sodium acrylate), vinyl ester/ethylenically unsaturated carboxylic acids, and saponified products or derivatives thereof.
- The flexible material may be further vulcanized with the use of a crosslinking agent such as sulfur.
- It is preferable that the composition of the flexible material may be controlled in such a manner as to give a moisture swelling ratio of the resulting molded article of 10 to 350%, still preferably 40 to 250%.
-
Figure 4 represents theplug 1 when inserted with its frontal end first in anopening 13 of a separationportion protection tube 14 of aconcrete structure 15, thebase 3 abutting the outer surface of the concrete structure around theopening 13. -
Fig. 5 represents an embodiment of theplug 1, which is not part of the invention, wherein thestem 2 and in particular theseat 5 of said stem is provided with ashoulder portion 17 at which the cross-sectional diameter of thestem 2 decreases towards the frontal end of thestem 2. - According to this embodiment, the
seal element 4 comprises ashoulder portion 18 at which the cross sectional diameter of the seal element decreases towards its frontal end. The cross sectional diameter D2 of said seal element distal of the shoulder portion is preferably larger than the cross sectional diameter D3 of the stem frontal of the shoulder portion. The seal is hereby detachably provided over the stem. - This plug has the advantage that it can be inserted in protection tubes of different diameters, in particular protection tubes having an inner diameter corresponding to the circumferential diameter of the plug distal of the shoulder portion of the seal (large diameter) and protection tubes having an inner diameter corresponding to the circumferential diameter of the plug frontal of the
shoulder portion 18 of the seal (small diameter). - In this last case, the seal can be fitted in the protection tube by first cutting away the distal end of the seal element at the
shoulder portion 18 and only providing the frontal end of the seal element on the stem to allow insertion of the plug in the protection tube as represented infigure 6 . In that case, the remainingring 19 of the seal element can be slid over the outer surface of the protection tube to provide anti-leakage at the protection tube's circumference. - The present invention is by no means limited to the embodiments described above and represented in the accompanying figures; on the contrary, such a plug for sealing an opening in a concrete structure can be made in various executions while remaining within the scope of the invention as defined by the appended claims.
Claims (9)
- A plug for sealing an opening in a concrete structure, in particular an opening of a separation portion of the concrete structure, said plug comprising a stem (2) with a base (3) at the distal end and a seat (5) defining a frontal end (12) of the stem (2) accommodating a seal element (4) that is designed as a cap like body enveloping the frontal end of the stem (2), wherein the seal element (4) is manufactured in a material having a lower hardness than the stem (2), whereby the stem (2) is made of an impact resistant synthetic material; and
whereby a free space (10) is defined between the distal end (11) of the seal element (4) and the frontal end (12) of the base (2); characterized in that the seat (5) of the stem (2) comprises axial grooves or rims (7) cooperating with rims or grooves (9) provided at an inner surface of the seal (4); and
in that the seal element (4) is manufactured in a moisture swellable material. - The plug according to claim 1, wherein the seal (4) element is manufactured in an elastomeric material.
- The plug according to claim 2, wherein the seal (4) element is manufactured in a thermoset rubber.
- The plug according to claim 1, wherein the seal (4) element is manufactured in a material having a hardness of 90 Shore A or lower.
- The plug according to claim 1, wherein the impact resistant material of the stem (2) has an E-modulus ranging between 250 and 3000 MPa.
- The plug according to claim 1, wherein the base comprises one or more radially extending rings (16) having cross sectional dimensions (A) substantially equal to cross sectional dimensions of the opening to be sealed.
- The plug according to claim 6, wherein the rings (16) are inclined from the base to their outer perimeter towards the distal end of the plug (1).
- The plug according to claim 1, wherein said free space has a width (D) corresponding to or larger than the displacement of the material of the seal element when inserting the plug with its frontal side in an opening.
- A kit of parts comprising a separation portion protection tube (14) and one or more plugs (1) as identified in claim 1 to 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11730960.9A EP2593617B1 (en) | 2010-07-12 | 2011-07-08 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10007146A EP2407611A1 (en) | 2010-07-12 | 2010-07-12 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
PCT/EP2011/061602 WO2012007378A1 (en) | 2010-07-12 | 2011-07-08 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
EP11730960.9A EP2593617B1 (en) | 2010-07-12 | 2011-07-08 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2593617A1 EP2593617A1 (en) | 2013-05-22 |
EP2593617B1 true EP2593617B1 (en) | 2017-03-15 |
Family
ID=42985350
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10007146A Withdrawn EP2407611A1 (en) | 2010-07-12 | 2010-07-12 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
EP11730960.9A Active EP2593617B1 (en) | 2010-07-12 | 2011-07-08 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10007146A Withdrawn EP2407611A1 (en) | 2010-07-12 | 2010-07-12 | Device for preventing permeation of rainwater or the like at a separator portion in a concrete structure |
Country Status (4)
Country | Link |
---|---|
EP (2) | EP2407611A1 (en) |
DE (1) | DE202011110691U1 (en) |
DK (1) | DK2593617T3 (en) |
WO (1) | WO2012007378A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012217823A1 (en) * | 2012-09-28 | 2014-04-03 | Harsco Infrastructure Services Gmbh | Wall formwork with sealing system |
DE102015212466A1 (en) * | 2015-07-03 | 2017-01-05 | Peri Gmbh | closing element |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7533055U (en) * | 1975-10-17 | 1976-02-12 | Dyckerhoff & Widmann Ag, 8000 Muenchen | SEALING PLUGS FOR CONICAL RECESSES IN CONCRETE COMPONENTS IN THE AREA OF FORMWORK ANCHORS |
DE3433575A1 (en) * | 1984-09-13 | 1986-03-20 | Döllen, Heinz von, 5840 Schwerte | Stopper for closing sheaths in concrete construction work |
JPH0526194Y2 (en) | 1986-11-11 | 1993-07-01 | ||
EP0286583A3 (en) | 1987-04-08 | 1990-03-21 | Elesta Ag Elektronik | Method for switching over, on or off a component of a heating, ventilation, air conditioning or heat pumps plant without the use of a control wire |
FR2742784B1 (en) | 1995-12-22 | 1998-02-06 | Kochem Michel | SEALING CONES FOR CONCRETE STRUCTURES |
DE102006003047A1 (en) * | 2006-01-20 | 2007-07-26 | Busak + Shamban Deutschland Gmbh | Sealing system for ends of pipes, comprises bung which fits into tubular sleeve with annular rib near its base, rib fitting into groove on outside of bung when it is partially inserted and into higher groove when it is completely inserted |
DE102005048707A1 (en) * | 2005-10-11 | 2007-04-19 | Busak + Shamban Deutschland Gmbh | Sealing system for ends of pipes, comprises bung which fits into tubular sleeve with annular rib near its base, rib fitting into groove on outside of bung when it is partially inserted and into higher groove when it is completely inserted |
DE202009018645U1 (en) * | 2008-03-12 | 2012-06-20 | Andreas Müller | Plug for closing openings in concrete walls |
DE202008012973U1 (en) * | 2008-09-30 | 2008-12-24 | WEM Würzburger Elastomertechnik GmbH | sealing plug |
DE202009004865U1 (en) * | 2009-05-26 | 2009-08-27 | Max Frank Gmbh & Co. Kg | sealing plug |
-
2010
- 2010-07-12 EP EP10007146A patent/EP2407611A1/en not_active Withdrawn
-
2011
- 2011-07-08 EP EP11730960.9A patent/EP2593617B1/en active Active
- 2011-07-08 WO PCT/EP2011/061602 patent/WO2012007378A1/en active Application Filing
- 2011-07-08 DE DE202011110691.1U patent/DE202011110691U1/en not_active Expired - Lifetime
- 2011-07-08 DK DK11730960.9T patent/DK2593617T3/en active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
DK2593617T3 (en) | 2017-06-06 |
WO2012007378A1 (en) | 2012-01-19 |
EP2593617A1 (en) | 2013-05-22 |
EP2407611A1 (en) | 2012-01-18 |
DE202011110691U1 (en) | 2015-08-17 |
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