CA1296542C - Device for prevention of rainwater or like from penetrating into concrete structure around each separator left therein - Google Patents
Device for prevention of rainwater or like from penetrating into concrete structure around each separator left thereinInfo
- Publication number
- CA1296542C CA1296542C CA000563890A CA563890A CA1296542C CA 1296542 C CA1296542 C CA 1296542C CA 000563890 A CA000563890 A CA 000563890A CA 563890 A CA563890 A CA 563890A CA 1296542 C CA1296542 C CA 1296542C
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- Prior art keywords
- water
- separator
- swollen
- rainwater
- damming
- Prior art date
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Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to a device for prevention of rainwater or like from penetrating into a concrete structure around each separator left embedded therein. said device comprising a hollow cylinder of synthetic resin, the latter including a female threaded cylinder made of metal or other material embedded in the interior at one end thereof and water-swollen damming-up outer rings fixed on the outer periphery so as to serve together as terminals, a threaded cylindrical portion formed at one end of each of said terminals being engaged with a male threaded portion formed around the corresponding end of the separator, and said cylinder of synthetic resin further including a plug provided with a water-swollen damming-up inner ring fixed into the interior at the other end thereof.
The present invention relates to a device for prevention of rainwater or like from penetrating into a concrete structure around each separator left embedded therein. said device comprising a hollow cylinder of synthetic resin, the latter including a female threaded cylinder made of metal or other material embedded in the interior at one end thereof and water-swollen damming-up outer rings fixed on the outer periphery so as to serve together as terminals, a threaded cylindrical portion formed at one end of each of said terminals being engaged with a male threaded portion formed around the corresponding end of the separator, and said cylinder of synthetic resin further including a plug provided with a water-swollen damming-up inner ring fixed into the interior at the other end thereof.
Description
~296S4~
The Present Invention relates to a device for preventlns, ln a concrete structure such as a concrete wall, rainwater or like from Penetratlng through a concrete wall surface into the concrete structure around each seParator which has been left embedded therein.
In constructing the above-mentloned concrete structure such as the concrete wall, the seParator Is usual 1Y used to hold each Palr of molds oPposed to each other at a predetermined distance and such separator is left embedded In the concrete structure after completlon of this structure. More partlcularly, each seParator Is provlded on its opposed ends wlth seParator terminals, resPectlvelY~ and these separator terminals are removed wl)en the molds are disassembled upon completion of the construction. Thls results In formation of a recess ln the concrete wall In a reglon ~P.
~296542 which has been occupied by each of the separator terminals. Such recess must be filled up in a sultable manner for water-sealing effect.
One well-known device for Prevention of rainwater or like from penetrating in the region of each seParator into the concrete structure has alreadY been described in UtilitY Model Publication No. 43-27286.
However, in this device of well known art, pluss are secured with adhesive into the recessed formed ln the concrete wall surface after the separator terminals have been removed from the resPective seParators. Such feature leads to various problems as follow :
(1) It is difficult for adhesive to spread uniformlY between the inner surface of the recess and the associated plug and often a gap is formed therebetween.
The Present Invention relates to a device for preventlns, ln a concrete structure such as a concrete wall, rainwater or like from Penetratlng through a concrete wall surface into the concrete structure around each seParator which has been left embedded therein.
In constructing the above-mentloned concrete structure such as the concrete wall, the seParator Is usual 1Y used to hold each Palr of molds oPposed to each other at a predetermined distance and such separator is left embedded In the concrete structure after completlon of this structure. More partlcularly, each seParator Is provlded on its opposed ends wlth seParator terminals, resPectlvelY~ and these separator terminals are removed wl)en the molds are disassembled upon completion of the construction. Thls results In formation of a recess ln the concrete wall In a reglon ~P.
~296542 which has been occupied by each of the separator terminals. Such recess must be filled up in a sultable manner for water-sealing effect.
One well-known device for Prevention of rainwater or like from penetrating in the region of each seParator into the concrete structure has alreadY been described in UtilitY Model Publication No. 43-27286.
However, in this device of well known art, pluss are secured with adhesive into the recessed formed ln the concrete wall surface after the separator terminals have been removed from the resPective seParators. Such feature leads to various problems as follow :
(1) It is difficult for adhesive to spread uniformlY between the inner surface of the recess and the associated plug and often a gap is formed therebetween.
(2) A gaP ls progressivelY formed between the inner surface of the recess and adhesive as the years go by, due to factors such as contraction of concrete and adhesive occurring during hardening thereof.
(3) A gap is formd also between the concrete wall and the seParator.
(4) A covering depth between the concrete wall surface and the seParator is relatively Poor.
In consequence, said gaPs serve as water Passases bY which rainwater or like Penetrates from the wall ~29654~
surface through the gaP between the recess In the concrete wall and the Plug into the other gaP between the concrete wall and the separator, causlng the separator to be rusted.
These Problems result in :
(a) DurabllitY of the structure deterlorates.
(b) Rust containing water exudes over the wall surface and InJures the beauty of the wall surface.
:
A prlnciPal obJect of the Present inventlon is, therefore, to Provide a device adaPted to effectlvelY
prevent ralnwater or llke from penetratlng through the wall surface into the concrete wall around each seParator left therein and therebY to overcome the problems as set forth above.
The Present invention Provldes a devlce for preventlon of ralnwater or like from Penetrating Into a concrete structure around each separator left embedded therein, said device comPrising a hollow cyllnder of synthetic resin, the latter including a female threaded cyllnder made of metal or other material embedded In the interlor at one end thereof and water-swollen dammlng-up outer rlngs flxed on the outer Perlphery so as to serve together as terminals, a threaded cYlindrlcal Portion formed at one end of each of said termlnals belng engaged with a male threaded portion formed around the correspondlng end of the seParator~
and said cyllnder of sYnthetlc resln further includlng a plug provlded wlth a water-swollen dammlng-uP inner rins fixed Into the interior at the other end thereof.
When each of the separator terminals Is incorporated with the dev~ce according to the present invention, anY quantitY of water having Penetrated into the gaP defined between the concrete wall A and the cyllnder I of the terminal 4 Is dammed uP bY the water-swollen dammlng-uP outer ring 3 agalnst further penetration further inwards.
on the other hand, anY quantitY of water having penetrated Into the gaP defined between the cYlinder of the terminal 4 and the PlUg 8 is dammed uP bY the water-swollen damming-uP Inner rlng 7 against penetration further Inwards.
In the accompanying drawings:
Fig. I is a longitudinal sectional view illustratlng an imPortant part of a concrete structure Incorporated wlth a device for preventlon of ralnwater or llke from penetratlng therelnto constructed accordlng to an embodlment of the Present Inventlon ;
Flg. 2 is a frontal view Illustrating one of terminals formlng part of said devlce ;
129654~
Flg. 3 is a side view of said terminal ;
Fig. 4 Is a frontal view lllustratlng a Plug provlded wlth a water-swollen dammlng-uP Inner rlng :
Flg. 5 Is a slde vlew of sald Plus ; and Flg. 6 Is a longltudlnal sectlonal vlew Illustratlng an Important Part of a concrete structure constructed with use of sald terminals but before the plus Is secured thereto.
The Present Inventlon wlll be descrlbed wlth respect to an embodlment as illustrated bY the accomPanyins drawlngs. Referrlng to the drawlngs. a reference A deslgnates a concrete wall and a reference 4 designates a termlnal adaPted to be threaded onto a correspondlng end of each separator 5 which ls. ln turn, adaPted to be embedded in sald concrete wall A.
The termlnal 4 comprlses a hollow cYllnder I made of sYnthetlc resln. lncludlng a female threaded cYllnder 2 recelved and embedded in the lnterlor at one end thereof, a flange 9 provlded therearound at the other end, an outwardlY flared recess 10 formed ln the Inner wall thereof at sald other end and a water-swollen dammlng-up outer rlng 3 fIxed around the outer perlPhery thereof ad~acent sald flange 9. A reference 5 deslgnates a separator provlded at opposlte ends wlth 12965~
respective male threads 6 having their base ends in the form of stoPpers 11. A reference 8 designates a Plug made of synthetic resin having a tapered head 12 at its base end. circumferential grooves 13, 14 formed therearound at its base end and front end.
respectively, so that the circumferential groove 1 receives a water-swollen damming-uP inner rins 7 slightly Pro~ecting from the outer Periphery of sald Plus 8 and the circumferential groove 14 is coated with suitable water-swollen seallng asent. if necessarY~ A
reference 15 deslgnates a water-swollen dammins-uP
outer ring fixed around the separator 5 at its middle position.
Examples of the water-swelling waterstop material to be used for the water-swellins waterstop rings 3. 7 and 15 include acrYl~ vinYl and inorganic water-swelling reslns. It is Particularly Preferable to use a flexible material containing water-swelling polYurethane which comPrises a mixture of a water-swelling polyurethane resin and. for examPle~ natural, sYnthetic or reclaimed rubber. therefor.
Such a flexible material as decrlbed above maY be obtained bY kneadins one or more Polyether polYols of the following general formula :
R[(OR)n]p wherein R rePresents a polyhydric alcohol residue;
~296S~;~
(OR) rePresents a Polyoxyalkylene chain comPrisins oxyalkylene grouPs each havlng an oxYethylene group and an alkYlene groUP carrying three or four carbon atoms. Provlded that the content of the oxyethylene groups amounts to 20 to 100X of the total molecular weight ;
n is a number corresponding to the degree of Polymerization of the oxyalkYlene srouPs and givlng a hydroxyl groUP equivalent of 200 to 2500;
and p ls a number of 2 to 8, preferablY 2 to 4 ;
together with urethane polymer(s) havlng Polyisocyanate groups, a crosslinking agent and the rubber as defined above followed bY curing.
Examples of said PolYhydric alcohol lnclude dlhydrlc alcohols such as ethYlene glycol and proPylene slYcol; trihydric alcohols such as glYcerol and trimethYlolpropane; tetrahYdric alcohols such as erythritol and Pentaerythritol; PentahYdric alcohols such as arabitol and xYlitol; and hexahYdr1c alcohols such as sorbitol and mannitol.
Said PolYether Polyols may be obtained bY adding alkylene oxlde(s) to these PolYhydric alcohols ln such a manner as to glve the desired molecular weight.
Elther random or block addltlon maY be emPloyed there~or. When the content of the oxYethYlene srouPs 1296S4?.
is less than 20X, the resultlng materlal ls unsatisfactorY as a waterstop materlal. AnY
polyisocyanates may be emPloyed. The content of the termlnal Isocyanate groUPs maY be 1 to 12%, preferablY
2 to 7X.
Examples of said crossltnking agent Include Polyols and polyamines each carrYing two to six active hYdrosen atoms Per molecule and has an average molecular wieght Per active hYdrogen atom of 30 to 15000, for example, low-molecular weight polYols~
addltlon PolYmers of low-molecular weight PolYols and alkYlene oxides and addltlon PolYmers of low-molecular weight polyamines and alkYlene oxides. as well as mixtures thereof.
It is Preferable that the flexible material as descrlbed above contains 20 to 800 parts of the water-swelling polYurethane resin Per 100 parts of the rubber.
Other examples of Preferable flexible materials are those obtained bY further addlng hYdraullc material(s) to a comPosition comprising sald water-swelling Polyurethane resin and rubber. Examples of available hydraulic materials Include Portland cement.
blast furnace cement. colloidal cement and sYpsum. It Is preferable to emPloy a curing accelerator for cement comPrislns calcium aluminate slmultaneouslY therewith.
1296S4;2 A flexible material comprising such a hydraulic material has an advantage that it shows little shrinkase when dried. It is Preferable that the hYdraulic materlal is blended in an amount of 20 to 30 parts per 100 parts of the mixture of the water-swelling Polyurethane and rubber.
The above flexible material maY further contain appropriate water-absorbing material(s). ExamPles of the water-absorbing materials include those mainlY
comprising an ~,~ -unsaturated comPound. which carries one or more carboxYl grouPS or those caPable of belng derived thereto such as carboxYl~ carboxYlate~
carboxylic imide, carboxYlic amide or carboxYlic anhYdride srouPs Per molecule, and oPtionally polymer~zed with other ~. ~ -unsaturated comPound(s) and/or modtfied with isocYanate(s).
ExamPles of such a water-absorbing resin include conventional water-absorbing Polymers such as starch/acrylic acid graft coPolymer~ a salt of styrene/maleic anhYdride copolymer, crosslinked polY(sodlum acrYlate)~ vinyl ester/ethYlenically unsaturated carboxylic acids. and saPonified Products of 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 1296S4?
flexible material maY be controlled in such a manner as to glve a water-swelling ratio of the resultlng molded artlcle of 10 to 350X. still Preferably 40 to 250X.
Fig. 5 Is a side view of said Plug and Fig. 6 is a longitudinal sectional view illustrating an imPortant part of a concrete structure constructed with use of said terminals but before the plug is secured thereto.
Referring to Fig. 6. a reference B designates a concrete mold having a through-hole 16 at an appropriate location. A reference 17 designates a connecting bolt having male threads 18, 19 on opposite ends. respectively. A reference 20 designates a mold clamPing lever having a threaded hole 21 formed in a base end thereof.
Now it will be considered how to construct a concrete wall using the device ~or prevention of rainwater or like from Penetrating thereinto according to the Present invention. As shown in Fig. 6. one end of the female threaded cYlinder 2 of the terminal 4 carrYins the water-swollen damming-uP outer ring 3 fixed around the cylinder I is advanced in engagement with the male thread 6 of the seParator 5 to the stoPper 11 of said male thread 6 and the male thread la of the connecting bolt 17 is threaded into the other end of said female threaded cYlinder 2.
Then, the connecting bolt 17 is inserted into the through-hole 16 of the mold B and the threaded hole 21 of the mold clamplng lever 20 is threaded on the male thread 19 of sald connecting bolt 17 so that the mold B
Is held between the termlnal 4 and the mold clamPing lever 20. Although Fig. 6 illustrates onlY the mold at one slde, the arrangement is same at the opposlte slde and a Pair of molds are held at a Predetermlned distance from each other. Thereafter, vertical and horlzontal batters are combined on the outside of the mold B in the conventional manner, although not shown, these batters are clamPed together bY suitable means throush the mold clamping levers 20 so as to flx the mold. Then, concrete maY be Placed into an internal space defined between the Pair of the molds to construct the concrete wall A.
Upon hardening of concrete which forms the concrete wall A, the molds are disassembled and then the connecting bolts 17 are threaded out.
Then, as seen in Fig. 1, the Plug 8 carrYing the water-swollen damming-up inner ring 7 is forced into the hollow interior of the synthetic resin c~llnder from the other end and the head 12 of sald Plus 8 is engaged in the recess 10 of the cYlinder I so as to fill said recess 10 wlth said head 12.
Said water-swollen damming-uP outer ring 3 performs the similar function even when said outer ring ~296S~2 3 is fixed around the cYlinder 1 at any other Positlon.
Additionally, as lllustrated in Fig. 6. the water-swollen damming-up ring 15 maY be fixed around the seParator 5 at anY Position to further improve water-sealing effect.
The device for prevention of rainwater or like from Penetrating into the concrete structure around each of the seParators constructed in accordance with the Present invention Provides signifIcant effects as follow :
(I) The separator terminals are of the embedded type, therefore, (a) Neither aPplication of seParatins materlal nor oPeration of the terminal removal is required so that the operation efficiencY is drasticallY improved and the work cost can be reduced.
(b) Concrete crack possibly associated with removal of the terminals can be avoided.
(c) Finish of the terminals is accomPlished simplY
by mounting the Pluss~ enabllns the flnished aPpearance to be aestheticallY imProved.
(2) The female threaded cYlinder made of metal or other material is embedded into the synthetlc resin cYlinder of the terminal at one end thereof and one end of said female threaded cYlinder is engaged with the male thread on the separator. AccordinglY~ it is 12~6542 possible to obtaln a relativelY large coverlng dePth from the wall surface to the comPonents such as the seParator and the metallic female threaded cYlinder.
Thls means that the metallic comPonents such as the separator and the female threaded cYlinder are prevented from ~elng rusted due to rainwater or like would otherwise Penetrate through the wall surface into the structure and thereby deterioration of the concrete structure ls avoided. Thls is effective particularlY
for the structure at the seaside exPosed to injurY from salt.
(3) Rainwater or like penetrating through the wall surface into the gaP defined between the concrete wall and the terminal is dammed up bY the water-swollen damming-up outer ring fixed around the terminal against further penetration inwards and rainwater or like penetrating into the gaP defined between said terminal and the Plus thereof is dammed up by the water-swollen damming-up inner ring disposed therebetween against further Penetration inwards.
With a consequence. it is effectively avoided that rainwater or like might Penetrate through the wall surface, through the gaP deflned between the concrete wall and the terminal and through the gaP defined between the terminal and the plug into the concrete wall around the separator. Therefore :
12965(~
la) The seParator is Prevented from being rusted.
Improving the durabillty of the concrete structure.
(b) There is no possibility that rust containing water exudes over the wall surface. Iniurlng the aesthetic aPpearance of the wall surface.
~ 4) Rainwater or like Penetrating into the saP
defined between the concrete wall and the terminal and/or the gaP defined between the terminal and the Plus swells the water-swollen dammlng-uP rings dlsPosed within these gaPs so that the dammlng-uP rlngs thus swollen are now pressed agalnst the concrete wall and the terminal and/or the terminal and the plug.
respectively, Perfectly filling uP these saPs and thereby further reliablY Preventing ralnwater or like from penetrating into the concrete wall around the separator terminal.
(5) Arrangement is simPle. enabling it to be easl 1Y manufactured at a low cost and Providlns a stable fixation.
In consequence, said gaPs serve as water Passases bY which rainwater or like Penetrates from the wall ~29654~
surface through the gaP between the recess In the concrete wall and the Plug into the other gaP between the concrete wall and the separator, causlng the separator to be rusted.
These Problems result in :
(a) DurabllitY of the structure deterlorates.
(b) Rust containing water exudes over the wall surface and InJures the beauty of the wall surface.
:
A prlnciPal obJect of the Present inventlon is, therefore, to Provide a device adaPted to effectlvelY
prevent ralnwater or llke from penetratlng through the wall surface into the concrete wall around each seParator left therein and therebY to overcome the problems as set forth above.
The Present invention Provldes a devlce for preventlon of ralnwater or like from Penetrating Into a concrete structure around each separator left embedded therein, said device comPrising a hollow cyllnder of synthetic resin, the latter including a female threaded cyllnder made of metal or other material embedded In the interlor at one end thereof and water-swollen dammlng-up outer rlngs flxed on the outer Perlphery so as to serve together as terminals, a threaded cYlindrlcal Portion formed at one end of each of said termlnals belng engaged with a male threaded portion formed around the correspondlng end of the seParator~
and said cyllnder of sYnthetlc resln further includlng a plug provlded wlth a water-swollen dammlng-uP inner rins fixed Into the interior at the other end thereof.
When each of the separator terminals Is incorporated with the dev~ce according to the present invention, anY quantitY of water having Penetrated into the gaP defined between the concrete wall A and the cyllnder I of the terminal 4 Is dammed uP bY the water-swollen dammlng-uP outer ring 3 agalnst further penetration further inwards.
on the other hand, anY quantitY of water having penetrated Into the gaP defined between the cYlinder of the terminal 4 and the PlUg 8 is dammed uP bY the water-swollen damming-uP Inner rlng 7 against penetration further Inwards.
In the accompanying drawings:
Fig. I is a longitudinal sectional view illustratlng an imPortant part of a concrete structure Incorporated wlth a device for preventlon of ralnwater or llke from penetratlng therelnto constructed accordlng to an embodlment of the Present Inventlon ;
Flg. 2 is a frontal view Illustrating one of terminals formlng part of said devlce ;
129654~
Flg. 3 is a side view of said terminal ;
Fig. 4 Is a frontal view lllustratlng a Plug provlded wlth a water-swollen dammlng-uP Inner rlng :
Flg. 5 Is a slde vlew of sald Plus ; and Flg. 6 Is a longltudlnal sectlonal vlew Illustratlng an Important Part of a concrete structure constructed with use of sald terminals but before the plus Is secured thereto.
The Present Inventlon wlll be descrlbed wlth respect to an embodlment as illustrated bY the accomPanyins drawlngs. Referrlng to the drawlngs. a reference A deslgnates a concrete wall and a reference 4 designates a termlnal adaPted to be threaded onto a correspondlng end of each separator 5 which ls. ln turn, adaPted to be embedded in sald concrete wall A.
The termlnal 4 comprlses a hollow cYllnder I made of sYnthetlc resln. lncludlng a female threaded cYllnder 2 recelved and embedded in the lnterlor at one end thereof, a flange 9 provlded therearound at the other end, an outwardlY flared recess 10 formed ln the Inner wall thereof at sald other end and a water-swollen dammlng-up outer rlng 3 fIxed around the outer perlPhery thereof ad~acent sald flange 9. A reference 5 deslgnates a separator provlded at opposlte ends wlth 12965~
respective male threads 6 having their base ends in the form of stoPpers 11. A reference 8 designates a Plug made of synthetic resin having a tapered head 12 at its base end. circumferential grooves 13, 14 formed therearound at its base end and front end.
respectively, so that the circumferential groove 1 receives a water-swollen damming-uP inner rins 7 slightly Pro~ecting from the outer Periphery of sald Plus 8 and the circumferential groove 14 is coated with suitable water-swollen seallng asent. if necessarY~ A
reference 15 deslgnates a water-swollen dammins-uP
outer ring fixed around the separator 5 at its middle position.
Examples of the water-swelling waterstop material to be used for the water-swellins waterstop rings 3. 7 and 15 include acrYl~ vinYl and inorganic water-swelling reslns. It is Particularly Preferable to use a flexible material containing water-swelling polYurethane which comPrises a mixture of a water-swelling polyurethane resin and. for examPle~ natural, sYnthetic or reclaimed rubber. therefor.
Such a flexible material as decrlbed above maY be obtained bY kneadins one or more Polyether polYols of the following general formula :
R[(OR)n]p wherein R rePresents a polyhydric alcohol residue;
~296S~;~
(OR) rePresents a Polyoxyalkylene chain comPrisins oxyalkylene grouPs each havlng an oxYethylene group and an alkYlene groUP carrying three or four carbon atoms. Provlded that the content of the oxyethylene groups amounts to 20 to 100X of the total molecular weight ;
n is a number corresponding to the degree of Polymerization of the oxyalkYlene srouPs and givlng a hydroxyl groUP equivalent of 200 to 2500;
and p ls a number of 2 to 8, preferablY 2 to 4 ;
together with urethane polymer(s) havlng Polyisocyanate groups, a crosslinking agent and the rubber as defined above followed bY curing.
Examples of said PolYhydric alcohol lnclude dlhydrlc alcohols such as ethYlene glycol and proPylene slYcol; trihydric alcohols such as glYcerol and trimethYlolpropane; tetrahYdric alcohols such as erythritol and Pentaerythritol; PentahYdric alcohols such as arabitol and xYlitol; and hexahYdr1c alcohols such as sorbitol and mannitol.
Said PolYether Polyols may be obtained bY adding alkylene oxlde(s) to these PolYhydric alcohols ln such a manner as to glve the desired molecular weight.
Elther random or block addltlon maY be emPloyed there~or. When the content of the oxYethYlene srouPs 1296S4?.
is less than 20X, the resultlng materlal ls unsatisfactorY as a waterstop materlal. AnY
polyisocyanates may be emPloyed. The content of the termlnal Isocyanate groUPs maY be 1 to 12%, preferablY
2 to 7X.
Examples of said crossltnking agent Include Polyols and polyamines each carrYing two to six active hYdrosen atoms Per molecule and has an average molecular wieght Per active hYdrogen atom of 30 to 15000, for example, low-molecular weight polYols~
addltlon PolYmers of low-molecular weight PolYols and alkYlene oxides and addltlon PolYmers of low-molecular weight polyamines and alkYlene oxides. as well as mixtures thereof.
It is Preferable that the flexible material as descrlbed above contains 20 to 800 parts of the water-swelling polYurethane resin Per 100 parts of the rubber.
Other examples of Preferable flexible materials are those obtained bY further addlng hYdraullc material(s) to a comPosition comprising sald water-swelling Polyurethane resin and rubber. Examples of available hydraulic materials Include Portland cement.
blast furnace cement. colloidal cement and sYpsum. It Is preferable to emPloy a curing accelerator for cement comPrislns calcium aluminate slmultaneouslY therewith.
1296S4;2 A flexible material comprising such a hydraulic material has an advantage that it shows little shrinkase when dried. It is Preferable that the hYdraulic materlal is blended in an amount of 20 to 30 parts per 100 parts of the mixture of the water-swelling Polyurethane and rubber.
The above flexible material maY further contain appropriate water-absorbing material(s). ExamPles of the water-absorbing materials include those mainlY
comprising an ~,~ -unsaturated comPound. which carries one or more carboxYl grouPS or those caPable of belng derived thereto such as carboxYl~ carboxYlate~
carboxylic imide, carboxYlic amide or carboxYlic anhYdride srouPs Per molecule, and oPtionally polymer~zed with other ~. ~ -unsaturated comPound(s) and/or modtfied with isocYanate(s).
ExamPles of such a water-absorbing resin include conventional water-absorbing Polymers such as starch/acrylic acid graft coPolymer~ a salt of styrene/maleic anhYdride copolymer, crosslinked polY(sodlum acrYlate)~ vinyl ester/ethYlenically unsaturated carboxylic acids. and saPonified Products of 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 1296S4?
flexible material maY be controlled in such a manner as to glve a water-swelling ratio of the resultlng molded artlcle of 10 to 350X. still Preferably 40 to 250X.
Fig. 5 Is a side view of said Plug and Fig. 6 is a longitudinal sectional view illustrating an imPortant part of a concrete structure constructed with use of said terminals but before the plug is secured thereto.
Referring to Fig. 6. a reference B designates a concrete mold having a through-hole 16 at an appropriate location. A reference 17 designates a connecting bolt having male threads 18, 19 on opposite ends. respectively. A reference 20 designates a mold clamPing lever having a threaded hole 21 formed in a base end thereof.
Now it will be considered how to construct a concrete wall using the device ~or prevention of rainwater or like from Penetrating thereinto according to the Present invention. As shown in Fig. 6. one end of the female threaded cYlinder 2 of the terminal 4 carrYins the water-swollen damming-uP outer ring 3 fixed around the cylinder I is advanced in engagement with the male thread 6 of the seParator 5 to the stoPper 11 of said male thread 6 and the male thread la of the connecting bolt 17 is threaded into the other end of said female threaded cYlinder 2.
Then, the connecting bolt 17 is inserted into the through-hole 16 of the mold B and the threaded hole 21 of the mold clamplng lever 20 is threaded on the male thread 19 of sald connecting bolt 17 so that the mold B
Is held between the termlnal 4 and the mold clamPing lever 20. Although Fig. 6 illustrates onlY the mold at one slde, the arrangement is same at the opposlte slde and a Pair of molds are held at a Predetermlned distance from each other. Thereafter, vertical and horlzontal batters are combined on the outside of the mold B in the conventional manner, although not shown, these batters are clamPed together bY suitable means throush the mold clamping levers 20 so as to flx the mold. Then, concrete maY be Placed into an internal space defined between the Pair of the molds to construct the concrete wall A.
Upon hardening of concrete which forms the concrete wall A, the molds are disassembled and then the connecting bolts 17 are threaded out.
Then, as seen in Fig. 1, the Plug 8 carrYing the water-swollen damming-up inner ring 7 is forced into the hollow interior of the synthetic resin c~llnder from the other end and the head 12 of sald Plus 8 is engaged in the recess 10 of the cYlinder I so as to fill said recess 10 wlth said head 12.
Said water-swollen damming-uP outer ring 3 performs the similar function even when said outer ring ~296S~2 3 is fixed around the cYlinder 1 at any other Positlon.
Additionally, as lllustrated in Fig. 6. the water-swollen damming-up ring 15 maY be fixed around the seParator 5 at anY Position to further improve water-sealing effect.
The device for prevention of rainwater or like from Penetrating into the concrete structure around each of the seParators constructed in accordance with the Present invention Provides signifIcant effects as follow :
(I) The separator terminals are of the embedded type, therefore, (a) Neither aPplication of seParatins materlal nor oPeration of the terminal removal is required so that the operation efficiencY is drasticallY improved and the work cost can be reduced.
(b) Concrete crack possibly associated with removal of the terminals can be avoided.
(c) Finish of the terminals is accomPlished simplY
by mounting the Pluss~ enabllns the flnished aPpearance to be aestheticallY imProved.
(2) The female threaded cYlinder made of metal or other material is embedded into the synthetlc resin cYlinder of the terminal at one end thereof and one end of said female threaded cYlinder is engaged with the male thread on the separator. AccordinglY~ it is 12~6542 possible to obtaln a relativelY large coverlng dePth from the wall surface to the comPonents such as the seParator and the metallic female threaded cYlinder.
Thls means that the metallic comPonents such as the separator and the female threaded cYlinder are prevented from ~elng rusted due to rainwater or like would otherwise Penetrate through the wall surface into the structure and thereby deterioration of the concrete structure ls avoided. Thls is effective particularlY
for the structure at the seaside exPosed to injurY from salt.
(3) Rainwater or like penetrating through the wall surface into the gaP defined between the concrete wall and the terminal is dammed up bY the water-swollen damming-up outer ring fixed around the terminal against further penetration inwards and rainwater or like penetrating into the gaP defined between said terminal and the Plus thereof is dammed up by the water-swollen damming-up inner ring disposed therebetween against further Penetration inwards.
With a consequence. it is effectively avoided that rainwater or like might Penetrate through the wall surface, through the gaP deflned between the concrete wall and the terminal and through the gaP defined between the terminal and the plug into the concrete wall around the separator. Therefore :
12965(~
la) The seParator is Prevented from being rusted.
Improving the durabillty of the concrete structure.
(b) There is no possibility that rust containing water exudes over the wall surface. Iniurlng the aesthetic aPpearance of the wall surface.
~ 4) Rainwater or like Penetrating into the saP
defined between the concrete wall and the terminal and/or the gaP defined between the terminal and the Plus swells the water-swollen dammlng-uP rings dlsPosed within these gaPs so that the dammlng-uP rlngs thus swollen are now pressed agalnst the concrete wall and the terminal and/or the terminal and the plug.
respectively, Perfectly filling uP these saPs and thereby further reliablY Preventing ralnwater or like from penetrating into the concrete wall around the separator terminal.
(5) Arrangement is simPle. enabling it to be easl 1Y manufactured at a low cost and Providlns a stable fixation.
Claims (2)
1. A device for prevention of rainwater or like from Penetrating into a concrete structure around each separator left embedded therein, said device comprising a hollow cylinder of synthetic resin. the latter including a female threaded cylinder made of metal or other material embedded in the interior at one end thereof and water-swollen damming-up outer rings fixed on the outer periphery so as to serve together as terminals. a threaded cylindrical Portion formed at one end of each of said terminals being engaged with a male threaded portion formed around the corresponding end of the separator, and said cylinder of synthetic resin further including a plus provided with a water-swollen damming-up inner ring fixed into the interior at the other end thereof.
2. A device for prevention of rainwater or like from penetrating into a concrete structure around each separator left embedded therein as recited in Claim 1, wherein said plus includes a tapered head at its base end a circumferential groove also at its base end to receive said water-swollen damming-up inner ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000563890A CA1296542C (en) | 1988-04-12 | 1988-04-12 | Device for prevention of rainwater or like from penetrating into concrete structure around each separator left therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000563890A CA1296542C (en) | 1988-04-12 | 1988-04-12 | Device for prevention of rainwater or like from penetrating into concrete structure around each separator left therein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1296542C true CA1296542C (en) | 1992-03-03 |
Family
ID=4137812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000563890A Expired - Lifetime CA1296542C (en) | 1988-04-12 | 1988-04-12 | Device for prevention of rainwater or like from penetrating into concrete structure around each separator left therein |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1296542C (en) |
-
1988
- 1988-04-12 CA CA000563890A patent/CA1296542C/en not_active Expired - Lifetime
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