EP0009660B2 - Verfahren und Vorrichtung zum Spritzen von Beton - Google Patents

Verfahren und Vorrichtung zum Spritzen von Beton Download PDF

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Publication number
EP0009660B2
EP0009660B2 EP79103338A EP79103338A EP0009660B2 EP 0009660 B2 EP0009660 B2 EP 0009660B2 EP 79103338 A EP79103338 A EP 79103338A EP 79103338 A EP79103338 A EP 79103338A EP 0009660 B2 EP0009660 B2 EP 0009660B2
Authority
EP
European Patent Office
Prior art keywords
concrete
conveying
mixture
water
branch
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
Application number
EP79103338A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0009660B1 (de
EP0009660A1 (de
Inventor
Hans-Ruedi Egger
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.)
INTRADYM MASCHINEN AG
Original Assignee
INTRADYM MASCHINEN AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INTRADYM MASCHINEN AG filed Critical INTRADYM MASCHINEN AG
Priority to AT79103338T priority Critical patent/ATE931T1/de
Publication of EP0009660A1 publication Critical patent/EP0009660A1/de
Publication of EP0009660B1 publication Critical patent/EP0009660B1/de
Application granted granted Critical
Publication of EP0009660B2 publication Critical patent/EP0009660B2/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/0404—Proportioning
    • B28C7/0409—Proportioning taking regard of the moisture content of the solid ingredients; Moisture indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
    • B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
    • B28C7/163—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump
    • B28C7/165—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump using a fluid, e.g. gas
    • 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
    • E04G21/04—Devices for both conveying and distributing
    • 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
    • E04G21/04—Devices for both conveying and distributing
    • E04G2021/049—Devices for both conveying and distributing concrete mixing nozzles specially adapted for conveying devices

Definitions

  • the invention relates to a method for spraying concrete according to the preamble of claim 1 and an apparatus for performing the method.
  • Such a method is used to apply concrete to a base, such as a wall or vault, for example in tunnels, in tunnel construction and in mining.
  • the compressed air serving as the conveying medium must have sufficient pressure to convey the concrete mass through a conveying path from a spraying machine to the spray nozzle. If a sufficient amount of water is added to the concrete mass before this conveying section, then the volume weight of the concrete mass is greater than that of a dry concrete mass and the frictional resistance in the conveying section increases due to the stickiness of the mass, so that the compressed air must have such a high pressure. that blockages of the conveyor hose serving as the conveying section are avoided with certainty.
  • the high pressure of the conveying air means that the concrete mass thrown out of the spray nozzle against the base hits the base with such force that a considerable proportion of the sprayed-on concrete mass bounces off the base and falls to the ground as unusable and disruptive waste .
  • the economy of the spraying process is considerably impaired by the loss of part of the concrete mass, since its proportion in the total concrete mass to be sprayed can be quite high.
  • the concrete mass is conveyed to the spray nozzle in an almost dry state and the required amount of water is only added at the nozzle, then a lower pressure of the conveying air is sufficient, but the exposure time of the water to the concrete mass is too short, so that the concrete mass adheres on the pad is difficult due to insufficient stickiness. In addition, dust develops, which can significantly obstruct the view.
  • the dry mixture is first pre-moistened to a certain moisture content and the pre-moistened mixture is then immediately before Spray nozzle the final amount of water added.
  • the rebound of the mass from the base is also supported in this case by the compressed air emerging from the spray nozzle together with the mass by blowing the mass away from the base again.
  • DE-U-1 766 089 it is therefore known from DE-U-1 766 089 to separate and branch off a portion of the compressed air from the concrete mass before the outlet end of the delivery line.
  • the concrete spraying device working with compressed air described in DE-C-442292 also works according to a similar principle in that, for the purpose of throttling the outlet speed, at least some of the compressed air is discharged at a branching c arranged in the delivery line a at a distance in front of a spray nozzle e, whereby the concrete is moved at an inhibited speed after the air diversion.
  • the problem of transporting the moist mass remains unsolved.
  • the invention is therefore based on the object of specifying a method for spraying concrete in which the rebound of concrete mass from the base is limited to a minimum.
  • the advantage of the method according to the invention lies in particular in the division of the moistening into a pre-moistening taking place in front of the conveying hose and a full moistening taking place at the spray nozzle. Due to the pre-moistening, the concrete mixture is wetted evenly before it reaches the delivery hose, so that the amount of water added to the spray nozzle is absorbed by the concrete mixture considerably faster than if the concrete mixture were still dry at this point. On the other hand, however, the pre-moistening can be kept so low that the transport through the spray line is not impaired to the extent that would be the case with a fully moistened concrete mixture.
  • the pre-moistening according to the invention brings about a more uniform moistening and more even conveying of the concrete mass outside the conveying hose, which results in a more homogeneous spray compound at the spray nozzle. Due to the lower weight of the only pre-moistened concrete mixture and the lower frictional resistance compared to a fully moistened concrete mixture, a lower pressure of the conveying air is sufficient, so that the kinetic energy of the concrete mixture emerging from the spray nozzle is also less high. If a portion of the compressed air is also diverted on the way to the spray nozzle, the rebound of the concrete mass from the surface onto which it is sprayed can actually be reduced to a minimum.
  • the amount of water added to the spray nozzle only needs to be set once to an optimum in order to maintain a constant moistening of the concrete mass to be processed.
  • FIG. 1 An exemplary embodiment of the subject matter of the invention is explained in more detail with reference to the drawing.
  • the only figure shows a system for spraying concrete.
  • a spray nozzle 10 is connected to a spraying machine 14 via a delivery hose 12, 12 '.
  • the spraying machine 14 has a collecting container 16, in which concrete mass 20 'is conveyed via a belt conveyor 18.
  • a moisture sensor 24 for measuring the moisture or the water content of the dry mixture 20 consisting of cement and additives filled into the collecting funnel 22 is arranged in a collecting container 22 of the belt conveyor 18.
  • an actuator 26 is controlled, which adjusts a valve 32 connected to a water connection 28 via a water line 30. Water is supplied to the dry mixture 20 via the valve 32. The amount of water supplied is metered as a function of the moisture in the dry mixture 20 measured by the moisture sensor 24, so that the moistened mixture or the concrete mass 20 ′ each has a constant water content.
  • the assignment between the measured moisture and the quantity of water supplied is dimensioned such that the water content of the concrete mass 20 'is, for example, 5 or 6%.
  • the pre-moistened concrete mass 20 ′ is conveyed from the spraying machine 14 through the delivery hose 12, 12 ′ to the spray nozzle 10 by means of compressed air supplied via a connection 34.
  • the spray nozzle 10 is connected to the water connection 28 via a metering pump 35, an adjustable water valve 36 and a hose line 38.
  • the metering pump 35 sucks a liquid quick binder from a container 46 via a suction line 44 and mixes it into the water in a metered amount.
  • the water supplied to the spray nozzle and containing the quick binder is added to the concrete mass 20 'during spraying.
  • the amount of water set on the water valve 36 is kept constant.
  • the sprayed concrete mass has an at least approximately constant water content.
  • the level of this water content is adjustable on the water valve 36. It is no longer necessary for the nozzle guide to influence the amount of water to be supplied.
  • a branch 40 is arranged at a pipe intermediate piece 41 inserted in the conveying hose 12, 12 'away from the spray nozzle 10.
  • This branch has a pipe section, which is preferably directed backwards at an angle of approximately 45 ° with respect to the conveying direction and the passage of which can be throttled by an adjusting valve 42.
  • An adjustable amount of the compressed air serving as a conveying means for the concrete mass 20 ′ can be discharged into the atmosphere via the branch 40.
  • the branched pipe section 40 is therefore directed towards the rear in order to prevent concrete mass from escaping as a result. Due to the kinetic energy imposed on it, the concrete mass 20 continues to flow through the delivery line 12, where, however, it is braked due to a lack of drive by the compressed air and friction on the hose walls.
  • the delivery hose in the area between the branch 40 and the spray nozzle 10 can be referred to as a braking section.
  • the concrete mass emerging from the spray nozzle 10 has a lower kinetic energy, so that no significant portion rebounds from the base 48 onto which the concrete mass is sprayed. This significantly reduces the previously unavoidable losses due to the rebound of concrete mass.
  • the pre-moistening of the dry mixture on the belt conveyor 18 enables continuous and uniform moistening, so that the concrete mass 20 'is well wetted.
  • the pre-moistening to a water content of about 5 or 6% is still so low that the conveying of this concrete mass 20 'on the conveying path between the spraying machine 14 and the spray nozzle 10 is not unnecessarily complicated.
  • the pre-moistened concrete mass then ensures that the amount of residual water added to the spray nozzle 10 is well absorbed by the mass, since it is already sufficiently wetted.
  • the quick binder added to the remaining water volume causes the concrete compound sprayed onto the base to set quickly.
  • the distance of the branch 40 from the spray nozzle can be 10 l to 3 m.
  • a screw conveyor can also be used.
  • the pre-moistening of the shotcrete to a constant humidity has the further advantage in connection with the use of a liquid quick binder that it can be added to the shotcrete together with the residual water in a constant, optimally effective amount.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Lining And Supports For Tunnels (AREA)
EP79103338A 1978-09-22 1979-09-07 Verfahren und Vorrichtung zum Spritzen von Beton Expired EP0009660B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79103338T ATE931T1 (de) 1978-09-22 1979-09-07 Verfahren und vorrichtung zum spritzen von beton.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH992778A CH632646A5 (de) 1978-09-22 1978-09-22 Verfahren und vorrichtung zum spritzen von beton.
CH9927/78 1978-09-22

Publications (3)

Publication Number Publication Date
EP0009660A1 EP0009660A1 (de) 1980-04-16
EP0009660B1 EP0009660B1 (de) 1982-04-28
EP0009660B2 true EP0009660B2 (de) 1986-05-07

Family

ID=4357187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103338A Expired EP0009660B2 (de) 1978-09-22 1979-09-07 Verfahren und Vorrichtung zum Spritzen von Beton

Country Status (8)

Country Link
US (1) US4275836A (enrdf_load_stackoverflow)
EP (1) EP0009660B2 (enrdf_load_stackoverflow)
JP (1) JPS5544395A (enrdf_load_stackoverflow)
AT (1) ATE931T1 (enrdf_load_stackoverflow)
BR (1) BR7906045A (enrdf_load_stackoverflow)
CH (1) CH632646A5 (enrdf_load_stackoverflow)
DE (1) DE2962635D1 (enrdf_load_stackoverflow)
ZA (1) ZA795004B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101228544B1 (ko) 2011-12-05 2013-01-31 한국과학기술원 콘크리트 타설장치

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DE3220880C2 (de) * 1982-06-03 1986-03-13 Pressbau GmbH, 4300 Essen Verfahren zum Mischen von Beton-Trockengemisch und Wasser beim Beton-Trockenspritzen und Mischrohr zum Beton-Trockenspritzen
JPS61176764A (ja) * 1985-01-31 1986-08-08 西松建設株式会社 コンクリ−トの吹付け方法
US5224654A (en) * 1985-06-28 1993-07-06 Friedrich Wilh. Schwing Gmbh Apparatus for pneumatically discharging liquified building material containing a hardener
DE3714386A1 (de) * 1987-04-30 1988-12-01 Degussa Verfahren und spritzaggregat zum auftragen einer spritzbetonschicht
DE3830479A1 (de) * 1988-09-08 1990-03-15 Tricosal Gmbh Verfahren und vorrichtung zum dosieren von fluessigen erstarrungsbeschleunigern zum austragen von spritzbeton
SE465967B (sv) * 1990-04-11 1991-11-25 Celleco Ab Foerfarande och anordning foer separering av en fibersuspension
JPH07103691B2 (ja) * 1990-06-20 1995-11-08 東亞合成株式会社 急結性吹付材の吹付工法
US5147156A (en) * 1991-07-29 1992-09-15 Sandscape Inc. Golf course construction and maintenance methods
AT402484B (de) * 1994-03-09 1997-05-26 Strobl Josef Vorrichtung zum verarbeiten und einbringen von mörtel
DE9413836U1 (de) * 1994-08-26 1995-07-13 Rombold & Gfröhrer GmbH & Co. KG, 71254 Ditzingen Anlage zum Spritzen von Trockenbaustoffen
DE10113785C1 (de) * 2001-03-21 2002-12-12 Inotec Gmbh Verfahren zum Auftragen von Mörtel auf eine Auftragsfläche
US6685107B1 (en) 2001-09-12 2004-02-03 Allan J. Salzman Soap dispensing spray nozzle
US8584864B2 (en) * 2010-11-19 2013-11-19 Coldcrete, Inc. Eliminating screens using a perforated wet belt and system and method for cement cooling
US8845940B2 (en) 2012-10-25 2014-09-30 Carboncure Technologies Inc. Carbon dioxide treatment of concrete upstream from product mold
CN105102370A (zh) 2013-02-04 2015-11-25 科尔德克利特股份有限公司 在混凝土的制造期间施加二氧化碳的系统和方法
JP6050154B2 (ja) * 2013-03-08 2016-12-21 鹿島建設株式会社 吹付け施工方法
CN103161166B (zh) * 2013-03-13 2015-02-25 长江三峡通航管理局 一种风引化学灌浆装置及其灌浆的方法
US9388072B2 (en) 2013-06-25 2016-07-12 Carboncure Technologies Inc. Methods and compositions for concrete production
US20160107939A1 (en) 2014-04-09 2016-04-21 Carboncure Technologies Inc. Methods and compositions for concrete production
US9376345B2 (en) 2013-06-25 2016-06-28 Carboncure Technologies Inc. Methods for delivery of carbon dioxide to a flowable concrete mix
US10927042B2 (en) 2013-06-25 2021-02-23 Carboncure Technologies, Inc. Methods and compositions for concrete production
WO2015123769A1 (en) 2014-02-18 2015-08-27 Carboncure Technologies, Inc. Carbonation of cement mixes
WO2015154174A1 (en) 2014-04-07 2015-10-15 Carboncure Technologies, Inc. Integrated carbon dioxide capture
CN105422133B (zh) * 2015-11-17 2018-09-11 湖南五新隧道智能装备股份有限公司 一种混凝土喷浆车故障预警系统及控制方法
AU2017249444B2 (en) 2016-04-11 2022-08-18 Carboncure Technologies Inc. Methods and compositions for treatment of concrete wash water
CN107013041B (zh) * 2017-04-20 2019-02-19 山东同得利集团有限公司 一种高效率的自流浇注料湿喷机
SG11201912759RA (en) 2017-06-20 2020-01-30 Carboncure Tech Inc Methods and compositions for treatment of concrete wash water
CN108393202A (zh) * 2018-03-21 2018-08-14 中建三局第二建设工程有限责任公司 一种用于对接水管的手持式可调喷淋洒水装置
FR3086961B1 (fr) * 2018-10-03 2023-02-10 Soletanche Freyssinet Projection de bfuhp a des fins de renforcement et de regeneration de structures preexistantes
CN111535329B (zh) * 2020-04-19 2021-11-12 河南四建工程有限公司 一种用于建筑施工的基坑喷锚装置
CN111516143A (zh) * 2020-06-04 2020-08-11 姑苏区大浦商务信息咨询服务部 一种地面找平砂浆的机械化施工设备
CN112096080B (zh) * 2020-09-12 2022-09-27 徐州中知知识产权服务有限公司 一种建筑施工混凝土灌注用串筒结构
PL73574Y1 (pl) * 2022-06-06 2024-09-23 Sieć Badawcza Łukasiewicz - Instytut Mechanizacji Budownictwa I Górnictwa Skalnego Mieszalnik inżektorowy, zwłaszcza do sporządzania mieszaniny antypirogennej w górnictwie
CN118958316B (zh) * 2024-10-16 2024-12-27 四川蜀道建设工程有限公司 一种保护既有地铁的预应力支护结构及施工方法

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CH424188A (it) * 1966-01-22 1966-11-15 Giudicelli Arturo Apparecchio per spruzzare impasti, in particolare malta cementizia, a rapidissimo indurimento
DE2130257C3 (de) * 1970-06-18 1975-04-03 Challenge-Cook Bros. Inc., Industry, Calif. (V.St.A.) Verfahren zum Spritzen von Beton od.dgl. sowie Vorrichtung zur Durchführung des Verfahrens
CH523106A (de) * 1971-01-21 1972-05-31 Fischer Ag Georg Trommelmischer zum ununterbrochenen Aufbereiten von Schüttgut, insbesondere von Giessereisand
JPS596193B2 (ja) * 1976-08-31 1984-02-09 旭硝子株式会社 不定形耐火材の吹付けによるライニング方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101228544B1 (ko) 2011-12-05 2013-01-31 한국과학기술원 콘크리트 타설장치

Also Published As

Publication number Publication date
CH632646A5 (de) 1982-10-29
EP0009660B1 (de) 1982-04-28
US4275836A (en) 1981-06-30
JPS6351740B2 (enrdf_load_stackoverflow) 1988-10-14
ATE931T1 (de) 1982-05-15
JPS5544395A (en) 1980-03-28
DE2962635D1 (en) 1982-06-09
EP0009660A1 (de) 1980-04-16
BR7906045A (pt) 1980-05-27
ZA795004B (en) 1980-09-24

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