CA1048890A - Procedure for treating newly placed concrete when casting concrete floors and the like and equipment for carrying out the procedure - Google Patents
Procedure for treating newly placed concrete when casting concrete floors and the like and equipment for carrying out the procedureInfo
- Publication number
- CA1048890A CA1048890A CA75232606A CA232606A CA1048890A CA 1048890 A CA1048890 A CA 1048890A CA 75232606 A CA75232606 A CA 75232606A CA 232606 A CA232606 A CA 232606A CA 1048890 A CA1048890 A CA 1048890A
- Authority
- CA
- Canada
- Prior art keywords
- water
- pump
- outlet
- inlet
- vacuum
- 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.)
- Expired
Links
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A vacuum unit, for use with a suction mat or plate for treating newly placed concrete, comprises a liquid ring pump with two inlets, a first connected to a vacuum reservior and the second to a water storage container. The pump outlet discharges into the storage container. The first inlet is connected to a pipe extending upwardly through the vacuum reservior and is fitted with a strainer at the upper end.
In use, water drawn from the concrete through the mat or plate passes through the vacuum reservior to the first pump inlet, and into the storage container. Sealing water for the pump is drawn from the storage container through the second inlet, and excess water flows out from the storage container through a weir overflow.
A vacuum unit, for use with a suction mat or plate for treating newly placed concrete, comprises a liquid ring pump with two inlets, a first connected to a vacuum reservior and the second to a water storage container. The pump outlet discharges into the storage container. The first inlet is connected to a pipe extending upwardly through the vacuum reservior and is fitted with a strainer at the upper end.
In use, water drawn from the concrete through the mat or plate passes through the vacuum reservior to the first pump inlet, and into the storage container. Sealing water for the pump is drawn from the storage container through the second inlet, and excess water flows out from the storage container through a weir overflow.
Description
1~)4~8~(~
PROCEDURE ~OR TREATING NEWLY PLACED CoNCRETE W~L~EN CASTING CONCRETE
FLOORS AND T~E LIK~ AND EQUIPMENT l~R CARRYING OUT THE PP.OCEDURE
This ln~entlon relates to a procedure for treat1ng newly placed concrete when castlrlg concrete ~loors and the like.
Su~plus ~ater ln the wet concrete is sucked vla a vacuum reser-voir throu~h a llquid ring pump and lnto a water storage conta1ner ln which atmospherlc pressure prevails and where the ~ater on attalnlng a certaln level in the container r10~8 out through a ~elr o~errlo~ and the sealing water necessary for the pump i8 sucked in ~rom the storage contalner through a ~pecial inlet ln the pump and ls subsequently pumped out together with the water Qucked up rrOm the concrete and back into the ~torage ¢ontainerO
A suctlon mat or suctlsn plate placed on top Or the con¢rete sur~ace ls generally used ~or suck~ng up the surplus ~ater rrOm newly placed concrete. A hose ~rom the pump unlt ls ¢onne¢ted to the top o~ the mat or plate and a unlrorm ~acuum 18 ~` obtalned over the sur~ace co~ered by the mat or plate by means Or suction ductQ on the underslde o~ the mat or plate.
On prevlously kno~n vacuum units ror the purpose ln questlon pumps are generally uced whlch do not allo~ the passage of water through them. As a result, both va¢uum reservoir and water ¢ontalner ~ill be under partlal vacuum. The water that ls sucked up from the concrete and pumped lnto the water contsiner can in consequence not be dralned e~¢ept when the pump 1s not in operatlon. Purthermore, a larger water cont~lner l~ requlred to avold the necesslty of dralning the ~ater container and con_e-quently turnln~ the pump orf in the mlddle of a suction operatlon.
The ln~entlon pro~ide~ an apparatus rOr compactlng 8~39(~
freshly placed concrete, comprl~3.ng ~uctlon mean~ adapted ~or sealable engagement wlth sald concrete ~urrace, a vacuum tank havlng an ~nl~t and an outlet, whereln ~ald outlet i~ at a lerel at or below th~t of sald lnlet and 18 above the level Or the bottom Or ~ald tank, a llquid ring pump having a maln lnlet, a seallng llquid lnlet, and ~n - outlet, a dohnstream recelving tank having an inlet, a seallng llquld outlet, and a maln outlet whlch 1~ at a level above that of sald sealing liquld outlet, means sealably connectlng said suction means to sald vacuum tank lnlet~
: means sealably connecting $ald vacuum tank outlet to ~ald llquid rlng pump main lnlet, means sealably connectlng sald llquid rlng pump outlet to $aid down~tream recelvlng tank lnlet, and means se~lably connectlng sald down~tream receivlng tank seallng llquld outlet to said llquld rlng pu~p ~eallng llquld inlet, ~ald llquid ring pump maln lnlet thereby belng sealed rrOm sa~d liquid rlng pump outlet - durln~ pumplng Or the water through the pump9 whereby water may be drawn from sald concrete surrace lnto said vacuum . 20 tank and contlnuously pumped from the ~acuum tank through - said Yacuu~ tank outlet wlthout lmpairing the vacuum in sald vacuum tank by preæsure leakage through the pump, and ~hereby solld partl~les carrled by the water ln~o sald vacuum tank may be trapped in sald vacuum tank.
The ~nventlon also provldss a method rOr compactlng rreshly plaoed concrete compriRlng placln~ suction means into sealed engagement wlth the surrace Or said concrete, sald means communlcatlng wlth a vacuum ~nk vla an inlet ln sald vacuum tank, applylng ~uctlon to ~aid surface through sald means wlth a llquid rlng pump downstream from sald
PROCEDURE ~OR TREATING NEWLY PLACED CoNCRETE W~L~EN CASTING CONCRETE
FLOORS AND T~E LIK~ AND EQUIPMENT l~R CARRYING OUT THE PP.OCEDURE
This ln~entlon relates to a procedure for treat1ng newly placed concrete when castlrlg concrete ~loors and the like.
Su~plus ~ater ln the wet concrete is sucked vla a vacuum reser-voir throu~h a llquid ring pump and lnto a water storage conta1ner ln which atmospherlc pressure prevails and where the ~ater on attalnlng a certaln level in the container r10~8 out through a ~elr o~errlo~ and the sealing water necessary for the pump i8 sucked in ~rom the storage contalner through a ~pecial inlet ln the pump and ls subsequently pumped out together with the water Qucked up rrOm the concrete and back into the ~torage ¢ontainerO
A suctlon mat or suctlsn plate placed on top Or the con¢rete sur~ace ls generally used ~or suck~ng up the surplus ~ater rrOm newly placed concrete. A hose ~rom the pump unlt ls ¢onne¢ted to the top o~ the mat or plate and a unlrorm ~acuum 18 ~` obtalned over the sur~ace co~ered by the mat or plate by means Or suction ductQ on the underslde o~ the mat or plate.
On prevlously kno~n vacuum units ror the purpose ln questlon pumps are generally uced whlch do not allo~ the passage of water through them. As a result, both va¢uum reservoir and water ¢ontalner ~ill be under partlal vacuum. The water that ls sucked up from the concrete and pumped lnto the water contsiner can in consequence not be dralned e~¢ept when the pump 1s not in operatlon. Purthermore, a larger water cont~lner l~ requlred to avold the necesslty of dralning the ~ater container and con_e-quently turnln~ the pump orf in the mlddle of a suction operatlon.
The ln~entlon pro~ide~ an apparatus rOr compactlng 8~39(~
freshly placed concrete, comprl~3.ng ~uctlon mean~ adapted ~or sealable engagement wlth sald concrete ~urrace, a vacuum tank havlng an ~nl~t and an outlet, whereln ~ald outlet i~ at a lerel at or below th~t of sald lnlet and 18 above the level Or the bottom Or ~ald tank, a llquid ring pump having a maln lnlet, a seallng llquid lnlet, and ~n - outlet, a dohnstream recelving tank having an inlet, a seallng llquld outlet, and a maln outlet whlch 1~ at a level above that of sald sealing liquld outlet, means sealably connectlng said suction means to sald vacuum tank lnlet~
: means sealably connecting $ald vacuum tank outlet to ~ald llquid rlng pump main lnlet, means sealably connectlng sald llquid rlng pump outlet to $aid down~tream recelvlng tank lnlet, and means se~lably connectlng sald down~tream receivlng tank seallng llquld outlet to said llquld rlng pu~p ~eallng llquld inlet, ~ald llquid ring pump maln lnlet thereby belng sealed rrOm sa~d liquid rlng pump outlet - durln~ pumplng Or the water through the pump9 whereby water may be drawn from sald concrete surrace lnto said vacuum . 20 tank and contlnuously pumped from the ~acuum tank through - said Yacuu~ tank outlet wlthout lmpairing the vacuum in sald vacuum tank by preæsure leakage through the pump, and ~hereby solld partl~les carrled by the water ln~o sald vacuum tank may be trapped in sald vacuum tank.
The ~nventlon also provldss a method rOr compactlng rreshly plaoed concrete compriRlng placln~ suction means into sealed engagement wlth the surrace Or said concrete, sald means communlcatlng wlth a vacuum ~nk vla an inlet ln sald vacuum tank, applylng ~uctlon to ~aid surface through sald means wlth a llquid rlng pump downstream from sald
- 2 -~ 34~89(~
vacuum tank and in communieation with an outlet in said vaeuum tank, whereby water is drawn from said surfaee into said vaeuum tank, and pumping the water from said vacuum tank and through said liquid ring pump into a downstream receiving tank which is open to the atmosphere, wherein the sealing liquid from said liquid ring pump is drawn into said pump from said downstream tank.
A sehematie diagram of a unit ~or carrying out the procedure aeeording to this invention is shown on the appended drawing in whieh Fig. 1 shows the unit viewed from above and Fig. 2 show-s a vertieal eross-seetion of the same through the line I-I in Fig. 1.
1 designates a liquid ring pump of eonventional ; design whieh is driven by an eleetrie motor 2 eoupled to it. The pump has two inlets 3 and 4 and one outlet 5.
., Inlet 3 is conneeted to a reservoir 6 which is under partial vaeuum when the pump is in operation. Inlet 4 is connected to a container 7 which is separated from reservoir 6 and is of such dimensions that it holds at least the volume of water required for satisfaetory operation of the pump. The reservoir and eontainer may be entirely separate but may also as shown on the drawing consist of two spaees separated by a partition M in one and 'he same enelosure.
Pump outlet 5 is also connected to eontainer 7 whieh in such manner is supplied with water and the pump is thereby assured of the neeessary minimum volume of water for its operation. Inside vacuum reservoir 6 is a level pipe 8 whieh is conneeted to the pump inlet 3. From inlet 3 it extends some way up in the container and is fitted at its upper end with a strainer 9 which prevents large particles 1~48~9V
~rom entering the pump.
Before the pump 1s started the ~acuum re~ervolr 6 and the storage contalner 7 are rllled wlth ~ater up to ; a level whlch ln Fig. 2 is defined by the llne A-A, i.e. level wlth the upper end Or plpe B.
Vacuum re~ervolr 6 ls ~itted wlth an inlet lO
to whlch the hose (not shown~ rrom the suctlon mat or suctlon plate 18 connected~ When the pump 1 ls in operatlon a part~al ~acuum arises ln reservolr 6 and water rrOm the concrete 19 sucked ln through lnlet lO. The ~nter level ln the reservolr wlll con~equently rise and water flow8 down through plpe 8 and lnto the pump 1, following whlch it 18 pumped out through outlet 5 and Into ~torage contalner 7.
A certaln amount o~ cement slurry Orten accom-panles the ~ater suck~d up ~rom the mat or plate. The larger partlcles ln this slurry are prevented by stralner 9 on plpe 8 from being sucked lnto the pump. Instead they settle to the bottom Or the vacuum reservoir whlch ln such ~anner acts as a partiole separator or sludge trap.
Extre~ely small partlcles are not stopped by the ~tralner, however, but pa~s through the pump although slnce this is Or llquld rlng type lt suffer~ no damage and the ~mall partlcles can ~aslly pass out through outlet 5 and into the storage contalner 7.
The ~ater that is pumped out lnto the storage contalner conslst~ partly or water sucked ln ~rom the ~torage contalner throush lnlet opening 4 and partly Or ~ater rrom the vacuum reservolr. In order to divert the surplu~ wRter ln ~torage container 7 the upper part Or lt .
1~34~t~90 ls fitted ~ith a welr overflow ll. As soon as the level o~ the water reaches this overrlow the water flows out through lt together with some of the partlcles still remalning in the water sucked up from the concrete. The remalnder o~ th0 partlcles of slurry 12 settle to the bottom of the storage container whlch ln this ~anner like the vacuum reservoir act~ as a sludge trap.
The slurry and ~he partlcles settllng on the bottom of the vacuum reservoir and the storage conta~ner mu~t be remored before the slurry set~ and form~ a hard : slab. The reservoir and container must thererore be cleaned and to fa¢llitate thls they are both provided wlth a removable bottom. To facilitate cleanlng of the stralner and the pump lnlet and outlet openlngs, the oombined enclosure shown ln Flg. 1 ts also equipped wlth a removable cover 13.
vacuum tank and in communieation with an outlet in said vaeuum tank, whereby water is drawn from said surfaee into said vaeuum tank, and pumping the water from said vacuum tank and through said liquid ring pump into a downstream receiving tank which is open to the atmosphere, wherein the sealing liquid from said liquid ring pump is drawn into said pump from said downstream tank.
A sehematie diagram of a unit ~or carrying out the procedure aeeording to this invention is shown on the appended drawing in whieh Fig. 1 shows the unit viewed from above and Fig. 2 show-s a vertieal eross-seetion of the same through the line I-I in Fig. 1.
1 designates a liquid ring pump of eonventional ; design whieh is driven by an eleetrie motor 2 eoupled to it. The pump has two inlets 3 and 4 and one outlet 5.
., Inlet 3 is conneeted to a reservoir 6 which is under partial vaeuum when the pump is in operation. Inlet 4 is connected to a container 7 which is separated from reservoir 6 and is of such dimensions that it holds at least the volume of water required for satisfaetory operation of the pump. The reservoir and eontainer may be entirely separate but may also as shown on the drawing consist of two spaees separated by a partition M in one and 'he same enelosure.
Pump outlet 5 is also connected to eontainer 7 whieh in such manner is supplied with water and the pump is thereby assured of the neeessary minimum volume of water for its operation. Inside vacuum reservoir 6 is a level pipe 8 whieh is conneeted to the pump inlet 3. From inlet 3 it extends some way up in the container and is fitted at its upper end with a strainer 9 which prevents large particles 1~48~9V
~rom entering the pump.
Before the pump 1s started the ~acuum re~ervolr 6 and the storage contalner 7 are rllled wlth ~ater up to ; a level whlch ln Fig. 2 is defined by the llne A-A, i.e. level wlth the upper end Or plpe B.
Vacuum re~ervolr 6 ls ~itted wlth an inlet lO
to whlch the hose (not shown~ rrom the suctlon mat or suctlon plate 18 connected~ When the pump 1 ls in operatlon a part~al ~acuum arises ln reservolr 6 and water rrOm the concrete 19 sucked ln through lnlet lO. The ~nter level ln the reservolr wlll con~equently rise and water flow8 down through plpe 8 and lnto the pump 1, following whlch it 18 pumped out through outlet 5 and Into ~torage contalner 7.
A certaln amount o~ cement slurry Orten accom-panles the ~ater suck~d up ~rom the mat or plate. The larger partlcles ln this slurry are prevented by stralner 9 on plpe 8 from being sucked lnto the pump. Instead they settle to the bottom Or the vacuum reservoir whlch ln such ~anner acts as a partiole separator or sludge trap.
Extre~ely small partlcles are not stopped by the ~tralner, however, but pa~s through the pump although slnce this is Or llquld rlng type lt suffer~ no damage and the ~mall partlcles can ~aslly pass out through outlet 5 and into the storage contalner 7.
The ~ater that is pumped out lnto the storage contalner conslst~ partly or water sucked ln ~rom the ~torage contalner throush lnlet opening 4 and partly Or ~ater rrom the vacuum reservolr. In order to divert the surplu~ wRter ln ~torage container 7 the upper part Or lt .
1~34~t~90 ls fitted ~ith a welr overflow ll. As soon as the level o~ the water reaches this overrlow the water flows out through lt together with some of the partlcles still remalning in the water sucked up from the concrete. The remalnder o~ th0 partlcles of slurry 12 settle to the bottom of the storage container whlch ln this ~anner like the vacuum reservoir act~ as a sludge trap.
The slurry and ~he partlcles settllng on the bottom of the vacuum reservoir and the storage conta~ner mu~t be remored before the slurry set~ and form~ a hard : slab. The reservoir and container must thererore be cleaned and to fa¢llitate thls they are both provided wlth a removable bottom. To facilitate cleanlng of the stralner and the pump lnlet and outlet openlngs, the oombined enclosure shown ln Flg. 1 ts also equipped wlth a removable cover 13.
Claims
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for uninterrupted removal of surplus water from freshly placed concrete, comprising:
a vacuum tank having an inlet for the water to be removed and outlet, wherein said out-let is at a level above the level of the bottom of the tank, a water ring pump having a main inlet, a sealing water inlet, and an outlet, a downstream receiving tank having an inlet communicating with the outlet of the pump, a sealing water outlet communicating with the sealing water inlet of the pump, and a main outlet which is at a level above that of said sealing water outlet, said water ring pump main inlet thereby communicating with the outlet of the vacuum tank, whereby water may be drawn from said concrete into said vacuum tank and continuously pumped from the vacuum tank through said vacuum tank outlet, and whereby solid particles carried by the water into said vacuum tank may be trapped in said vacuum tank, and whereby the receiving tank may permit the water passing through the pump to flow out, suffici-ently cleaned from sludge, freely to the atmosphere, and whereby the sealing water for the water ring pump may be drawn into the pump from said receiving tank.
a vacuum tank having an inlet for the water to be removed and outlet, wherein said out-let is at a level above the level of the bottom of the tank, a water ring pump having a main inlet, a sealing water inlet, and an outlet, a downstream receiving tank having an inlet communicating with the outlet of the pump, a sealing water outlet communicating with the sealing water inlet of the pump, and a main outlet which is at a level above that of said sealing water outlet, said water ring pump main inlet thereby communicating with the outlet of the vacuum tank, whereby water may be drawn from said concrete into said vacuum tank and continuously pumped from the vacuum tank through said vacuum tank outlet, and whereby solid particles carried by the water into said vacuum tank may be trapped in said vacuum tank, and whereby the receiving tank may permit the water passing through the pump to flow out, suffici-ently cleaned from sludge, freely to the atmosphere, and whereby the sealing water for the water ring pump may be drawn into the pump from said receiving tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA75232606A CA1048890A (en) | 1975-07-31 | 1975-07-31 | Procedure for treating newly placed concrete when casting concrete floors and the like and equipment for carrying out the procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA75232606A CA1048890A (en) | 1975-07-31 | 1975-07-31 | Procedure for treating newly placed concrete when casting concrete floors and the like and equipment for carrying out the procedure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1048890A true CA1048890A (en) | 1979-02-20 |
Family
ID=4103750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA75232606A Expired CA1048890A (en) | 1975-07-31 | 1975-07-31 | Procedure for treating newly placed concrete when casting concrete floors and the like and equipment for carrying out the procedure |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1048890A (en) |
-
1975
- 1975-07-31 CA CA75232606A patent/CA1048890A/en not_active Expired
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