US3600771A - Device for draining newly cast concrete by vacuum treatment - Google Patents

Device for draining newly cast concrete by vacuum treatment Download PDF

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Publication number
US3600771A
US3600771A US840971A US3600771DA US3600771A US 3600771 A US3600771 A US 3600771A US 840971 A US840971 A US 840971A US 3600771D A US3600771D A US 3600771DA US 3600771 A US3600771 A US 3600771A
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US
United States
Prior art keywords
mat
gauze
draining
outlet ports
ribbon
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 - Lifetime
Application number
US840971A
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English (en)
Inventor
Bror Dyrander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tremix AB
Original Assignee
Tremix AB
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Filing date
Publication date
Priority claimed from SE28269A external-priority patent/SE325400C/xx
Application filed by Tremix AB filed Critical Tremix AB
Application granted granted Critical
Publication of US3600771A publication Critical patent/US3600771A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/46—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for humidifying or dehumidifying
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/061—Solidifying concrete, e.g. by application of vacuum before hardening by applying vacuum or vacuum combined with vibration

Definitions

  • a device for draining and compressing newly cast concrete by vacuum treatment is described in the US. Pat. No. 2,046,867.
  • a filter gauze to be spread over the concrete surface is covered by a mat of flexible rubber, and draining passages formed between the gauze and the mat communicate with openings provided through the mat within a narrow bandlike area, said openings being then connected to suction means.
  • the mat may of course also be made from flexible plastic material.
  • the object of the invention is to provide an improved device which eliminates said inconveniences.
  • the openings communicating with the draining passage end in collecting spaces provided at the outside of the mat, and these spaces communicate in turn with outlet ports located within a restricted area of the mat.
  • a nozzle connected to a movable suction conduit is dimensioned to cover all the outlet ports when applied manually in correct position against the exterior of the mat.
  • the mat is thus quite free from attached suction conduits, it can be stored and transported in the form of a roll which may, with a few simple manipulations, be rolled out over the newly cast concrete surface, whereupon the suction nozzle is applied and adheres to the area around the outlet ports.
  • the nozzle may be released by closing a valve in the suction conduit, for instance, and the mat may then easily be moved on to another concrete surface cast meanwhile, whereupon the nozzle is again applied. In this way the work may be carried out rationally.
  • the disposal of the collecting spaces above the mat makes it possible to use a cheap, fluted mat of a standard type.
  • the bottom side of the mat may contain the draining passages open towards the filter gauze, but in a preferred embodiment said passages may be formed in a perforated web or sheet placed between the gauze and the mat.
  • a perforated web or sheet placed between the gauze and the mat.
  • Such a sheet may consist of a wide-meshed net of rather coarse threads, preferably of metal or plastics. If a particularly well planed concrete surface is desired, the sheet may consist of a rather rigid and perforated sheet of rubber or plastics fluted on the underside.
  • the sheet can be divided into a plurality of sections which are placed one beside the other so that together they cover the concrete surface to be drained in one operation.
  • the gauze is attached to the various sections so that it is spread out simultaneously therewith.
  • the cover mat is made of one piece and may to advantage consist of a thin and smooth cloth of rubber or plastics preferably reinforced by fabric. As such a mat may be given a comparatively light weight, it may be dimensioned such that a rather large concrete surface (30-40 sq.m.) may be drained in one operation.
  • the thin plastic cloth may conveniently be rolled up on one or two rods so that even in large dimensions it can be easily handled by two workmen.
  • FIG. 1 shows a perspective view of one embodiment
  • FIG. 2 is a perspective view of the mat on a larger scale with some parts broken up;
  • FIG. 3 shows an end view of the suction nozzle
  • FIG. 4 shows a perspective view of another embodiment, partly broken up
  • FIG. 5 shows a perspective view of a third embodiment, likewise partly broken up.
  • a rather dense gauze 5 of metal wire or textile material preferably nylon or a similar synthetic material, is spread over a rectangular concrete surface 6, and the gauze is covered by a rubber mat 7 projecting outside the gauze 5 at all four edges so that it can be sucked into sealing contact with the concrete surface.
  • the mat 7 is provided with longitudinal flutes 8 on the side facing the gauze, and as shown at 9 in FIG. 1, such flutes 8 may be closed at the short sides of the mat, although this is not always necessary.
  • the edges of the gauze 5 arein some way releasably secured to the mat 7 so that the mat and the gauze may be applied as a unit.
  • the flutes 8 communicate with the top side of the mat by holes 10 provided in zigzag along a transverse central section in such a way that the mat is not unduly weakened.
  • the holes are covered by a strip 11 of highly porous material, preferably a wide-meshed net, and this strip is, in turn, covered by a rubber ribbon 12 of greater length and width.
  • the edge portions of said ribbon 12 are cemented to the mat 7 all around.
  • the ribbon 12 involves a desirable reinforcement of the middle section of the mat weakened by the holes 10. Within a limited central area the ribbon 12 has a number of closely spaced slits 13 which thus communicate with all the flutes 8 at the bottom side of the mat.
  • a suction nozzle is placed over the area having the slits 13.
  • a nozzle 14 is shown in a position above the slits.
  • the nozzle consists of a box secured to and communicating with one end of a rigid handle tube 15 containing a shutoff valve 16.
  • the other end of the tube is connected by a hose, not shown, to a source of vacuum, likewise not shown, preferably over a water collecting tank.
  • the wall of the nozzle box facing away from the tube 15 is provided with a great number of perforations 17 (FIG.
  • the gauze cloth 5 and the rubber mat 7 are of the same kind as described, but the porous strip 11 and the smooth cover ribbon 12 are replaced by a rubber ribbon 20 cemented to the mat along its edges.
  • the lower side of the ribbon 20 is provided with longitudinal flutes 21 closed at both ends, as shown at 22, and communicating with the holes 10 in the mat 7.
  • a central portion of the ribbon 20 is provided with longitudinal slits 23 adapted to cooperate with the nozzle 14 described.
  • the gauze 5 has its edges secured to one side of a wide-meshed net 24 made of metal or plastics and dimensioned such that passageways of sufficient cross section area are formed between the crossed wires.
  • the wire thickness may be about 1 mm. while the size of the mesh may be 2-3 mm.
  • Wire nets of this kind are obtainable commercially in a width of 1.5 m., and in the embodiment shown three wire net sections 24 with attached gauze are laid over the concrete surface 6 in such a way that their longitudinal edges overlap.
  • the wire nets 24 are covered by a smooth cloth 25 of rubber or plastics, preferably reinforce by fabric.
  • the cloth 25 may have a thickness of 0.5-l mm., and as appears from FIG. 5, it is dimensioned such that its edge portions project slightly outside the wire nets 24.
  • the cloth 25 is provided with holes 10 within a narrow central section, and said holes are covered by a strip 11 of highly porous material, preferably a wide-meshed net.
  • the suction noule 14 is of the same kind as that described in the previous embodiments.
  • the device described involves a substantial simplification of the draining operation.
  • the mat and the attached gauze may initially be in the form of a roll which need only be rolled out over the concrete surface, whereupon the nozzle connected to the source of vacuum is applied manually,
  • the sheets with attached gauze are laid over the concrete surface, and the thin cloth initially on a roll is rolled out to cover all the sheets, whereupon the nozzle is applied.
  • the device has proved to operate effectively, and at a pressure of about 0.1-0.3 mm, for instance, a draining period of 1 minute per cm. of the thickness of the concrete is generally quite sufficient to make the concrete hard enough to carry a man without any risk of impressions.
  • Means for draining newly cast concrete by a vacuum treatment comprising a filter gauze to be spread over the concrete surface, a mat of flexible material covering said gauze, draining passages between said gauze and said mat, a porous strip located at the outside of said mat having collecting spaces, said mat having openings in a narrow bandlike area connecting said draining passages to said collecting spaces, a cover ribbon covering said porous strip sealed to said mat outside'the edges of said strip, said cover ribbon having outlet ports from said collecting spaces located within a restricted area of said cover ribbon, and a nonle covering said outlet ports connected to a suction conduit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
US840971A 1968-08-01 1969-07-11 Device for draining newly cast concrete by vacuum treatment Expired - Lifetime US3600771A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1039668 1968-08-01
SE28269A SE325400C (sv) 1969-01-10 1969-01-10 Anordning för avvattning av nygjuten betong genom vakuumbehandling

Publications (1)

Publication Number Publication Date
US3600771A true US3600771A (en) 1971-08-24

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Application Number Title Priority Date Filing Date
US840971A Expired - Lifetime US3600771A (en) 1968-08-01 1969-07-11 Device for draining newly cast concrete by vacuum treatment

Country Status (9)

Country Link
US (1) US3600771A (enExample)
BE (1) BE736321A (enExample)
DE (1) DE1938710A1 (enExample)
DK (1) DK127847B (enExample)
ES (1) ES370113A1 (enExample)
FR (1) FR2014826A1 (enExample)
GB (1) GB1205010A (enExample)
IE (1) IE33539B1 (enExample)
NL (1) NL6911720A (enExample)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203714A (en) * 1975-05-30 1980-05-20 Tremix Ab Apparatus for vacuum processing of concrete
US4518496A (en) * 1983-01-05 1985-05-21 Minoru Kanekubo Liquid branch flow guide conduit assembly for use in a magnetic apparatus for separating foreign matters from waste liquids containing the foreign matters
GB2181774A (en) * 1985-10-17 1987-04-29 Kumagai Gumi Co Ltd Concrete form apparatus
US4730805A (en) * 1985-05-28 1988-03-15 Kabushiki Kaisha Kumagaigumi Form for forming concrete
US4767491A (en) * 1985-02-15 1988-08-30 Moplefan S.P.A. Device for the continuous production of manufactured articles reinforced with mixtures of hydraulic binders
US4787597A (en) * 1985-05-28 1988-11-29 Kabushiki Kaisha Kumagaigumi Cloth faced form for forming concrete
US5124102A (en) * 1990-12-11 1992-06-23 E. I. Du Pont De Nemours And Company Fabric useful as a concrete form liner
US5135692A (en) * 1989-11-20 1992-08-04 E. I. Du Pont De Nemours And Company Form for patterned concrete
US5206981A (en) * 1991-10-25 1993-05-04 E. I. Du Pont De Nemours And Company Fabric tensioning frame
US5246650A (en) * 1991-06-03 1993-09-21 Clark Richard C Method of applying aggregate surface finish
US5247730A (en) * 1991-10-25 1993-09-28 E. I. Du Pont De Nemours And Company Method for attaching and bidirectionally tensioning a porous fabric over a form support
US5302099A (en) * 1992-09-28 1994-04-12 E. I. Du Pont De Nemours And Company Laminated fabric useful as a concrete form liner
US20050132596A1 (en) * 1999-03-08 2005-06-23 Storrer Ernest J. Moisture removal system
WO2005047792A3 (en) * 2003-11-14 2005-07-28 Meir Almog Method and system for drying building structures
CN112060296A (zh) * 2020-08-21 2020-12-11 湖南五新模板有限公司 一种钢塑结合的混凝土预制构件模具及其脱模方法
CN112140295A (zh) * 2020-08-21 2020-12-29 湖南五新模板有限公司 一种构件模具及其脱模方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3033197A1 (de) * 1980-09-03 1982-04-08 Tremix AB, Skärholmen Saugmatte fuer die vakuumbehandlung von beton
CN106677521A (zh) * 2016-11-23 2017-05-17 中国水利水电科学研究院 带喷雾装置的混凝土浇筑用模板及应用其的仓面温控系统
CN115026937B (zh) * 2022-06-09 2023-07-07 东岳机械股份有限公司 一种基于生产加气混凝土用真空吸罩快速泄压装置
CN115653331B (zh) * 2022-09-21 2025-07-15 中国建筑第七工程局有限公司 一种大体积混凝土施工养护系统及其养护方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1945145A (en) * 1932-04-04 1934-01-30 Viber Company Ltd Method of and apparatus for compacting and dewatering cementitious mixtures
US2046867A (en) * 1935-10-05 1936-07-07 Vacuum Concrete Corp Method of and apparatus for treating concrete
US2133641A (en) * 1936-02-17 1938-10-18 William M Tompkins Covering for freshly poured concrete
US2524419A (en) * 1946-03-01 1950-10-03 Vacuum Concrete Inc Apparatus and method for utilizing vacuum in molding plastic material, such as concrete
US2529500A (en) * 1947-06-12 1950-11-14 John Gunnar A Johnson Apparatus for drying and expediting the setting of plastic concrete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1945145A (en) * 1932-04-04 1934-01-30 Viber Company Ltd Method of and apparatus for compacting and dewatering cementitious mixtures
US2046867A (en) * 1935-10-05 1936-07-07 Vacuum Concrete Corp Method of and apparatus for treating concrete
US2133641A (en) * 1936-02-17 1938-10-18 William M Tompkins Covering for freshly poured concrete
US2524419A (en) * 1946-03-01 1950-10-03 Vacuum Concrete Inc Apparatus and method for utilizing vacuum in molding plastic material, such as concrete
US2529500A (en) * 1947-06-12 1950-11-14 John Gunnar A Johnson Apparatus for drying and expediting the setting of plastic concrete

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203714A (en) * 1975-05-30 1980-05-20 Tremix Ab Apparatus for vacuum processing of concrete
US4518496A (en) * 1983-01-05 1985-05-21 Minoru Kanekubo Liquid branch flow guide conduit assembly for use in a magnetic apparatus for separating foreign matters from waste liquids containing the foreign matters
US4767491A (en) * 1985-02-15 1988-08-30 Moplefan S.P.A. Device for the continuous production of manufactured articles reinforced with mixtures of hydraulic binders
US4917749A (en) * 1985-02-15 1990-04-17 Mopfelan S.P.A. Process for the continuous production of manufactured articles reinforced with mixtures of hydraulic binders
US4730805A (en) * 1985-05-28 1988-03-15 Kabushiki Kaisha Kumagaigumi Form for forming concrete
US4787597A (en) * 1985-05-28 1988-11-29 Kabushiki Kaisha Kumagaigumi Cloth faced form for forming concrete
GB2181774A (en) * 1985-10-17 1987-04-29 Kumagai Gumi Co Ltd Concrete form apparatus
US5135692A (en) * 1989-11-20 1992-08-04 E. I. Du Pont De Nemours And Company Form for patterned concrete
US5124102A (en) * 1990-12-11 1992-06-23 E. I. Du Pont De Nemours And Company Fabric useful as a concrete form liner
US5246650A (en) * 1991-06-03 1993-09-21 Clark Richard C Method of applying aggregate surface finish
US5206981A (en) * 1991-10-25 1993-05-04 E. I. Du Pont De Nemours And Company Fabric tensioning frame
US5247730A (en) * 1991-10-25 1993-09-28 E. I. Du Pont De Nemours And Company Method for attaching and bidirectionally tensioning a porous fabric over a form support
US5302099A (en) * 1992-09-28 1994-04-12 E. I. Du Pont De Nemours And Company Laminated fabric useful as a concrete form liner
US20050132596A1 (en) * 1999-03-08 2005-06-23 Storrer Ernest J. Moisture removal system
US20100192400A1 (en) * 1999-03-08 2010-08-05 Storrer Ernest J Moisture removal system
WO2005047792A3 (en) * 2003-11-14 2005-07-28 Meir Almog Method and system for drying building structures
CN112060296A (zh) * 2020-08-21 2020-12-11 湖南五新模板有限公司 一种钢塑结合的混凝土预制构件模具及其脱模方法
CN112140295A (zh) * 2020-08-21 2020-12-29 湖南五新模板有限公司 一种构件模具及其脱模方法
CN112060296B (zh) * 2020-08-21 2022-06-24 湖南五新模板有限公司 一种钢塑结合的混凝土预制构件模具及其脱模方法
CN112140295B (zh) * 2020-08-21 2022-06-24 湖南五新模板有限公司 一种构件模具及其脱模方法

Also Published As

Publication number Publication date
NL6911720A (enExample) 1970-02-03
GB1205010A (en) 1970-09-09
IE33539L (en) 1970-02-01
BE736321A (enExample) 1969-12-31
DE1938710A1 (de) 1970-03-05
IE33539B1 (en) 1974-08-07
DK127847B (da) 1974-01-21
ES370113A1 (es) 1971-04-01
FR2014826A1 (enExample) 1970-04-24

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