EP1704030A1 - Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection - Google Patents

Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection

Info

Publication number
EP1704030A1
EP1704030A1 EP05707745A EP05707745A EP1704030A1 EP 1704030 A1 EP1704030 A1 EP 1704030A1 EP 05707745 A EP05707745 A EP 05707745A EP 05707745 A EP05707745 A EP 05707745A EP 1704030 A1 EP1704030 A1 EP 1704030A1
Authority
EP
European Patent Office
Prior art keywords
shotcrete
additive
processing
water
spraying machine
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.)
Withdrawn
Application number
EP05707745A
Other languages
German (de)
English (en)
Inventor
Gustav Bracher
Benedikt Lindlar
Beat Mathys
Cyrill Spirig
Franz Wombacher
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.)
Sika Technology AG
Original Assignee
Sika Technology 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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP05707745A priority Critical patent/EP1704030A1/fr
Publication of EP1704030A1 publication Critical patent/EP1704030A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00—General arrangement or layout of plant
    • B28C9/002—Mixing systems, i.e. flow charts or diagrams; Making slurries; Involving methodical aspects; Involving pretreatment of ingredients; Involving packaging
    • B28C9/004—Making slurries, e.g. with discharging means for injecting in a well or projecting against a wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
    • B28C5/026—Mixing guns or nozzles; Injector mixers
    • 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
    • B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
    • 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
    • B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
    • B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
    • B28C7/003—Heating, e.g. using steam
    • 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
    • B28C7/0413—Proportioning two or more flows in predetermined ratio
    • 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
    • B28C7/0418—Proportioning control systems therefor
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite

Definitions

  • the invention is based on a method for processing shotcrete by means of a spraying machine according to the preamble of the first claim.
  • the invention is also based on a spraying machine according to the preamble of the independent device claim.
  • the hydraulic binding agent for example cement, lime or gypsum, appropriate additives such as gravel and sand and, if necessary, concrete admixtures are used before spraying with water mixed.
  • the wet shotcrete is then conveyed hydraulically to the spray nozzle using the dense phase method or pneumatically using the thin current method.
  • the dense stream process the dense stream is torn open shortly before the spray nozzle by means of high air pressure and, if necessary, accelerators are fed in by means of the air stream.
  • the accelerator is also metered into the shotcrete with air just before the spray nozzle.
  • the dry shotcrete consisting of hydraulic binder, additives and, if necessary, concrete additives is poured into the concrete spraying machine.
  • the funding here is pneumatic using the thin-current method. Shortly before the spray nozzle, water is added with an accelerator.
  • the concrete admixtures, in particular accelerators, which are added in the area of the spray nozzle, are always metered in in liquid form.
  • These liquid additives, in particular solidification accelerators, are usually brought to the spraying station or the spraying machine in containers.
  • a problem with these liquid additives, however, is the storage stability, which is often inadequate, as a result of which the additives can become unusable after prolonged storage.
  • these liquid concrete admixtures have a relatively large volume, which is why the replenishment to the spraying machine can pose transport and replenishment problems.
  • additives in particular solidification accelerators, were transported to the construction site in powder form and dissolved there with water.
  • the liquid solidification accelerator obtained in this way was then transported from the construction site to the spraying stand and used in analogy to the already liquid solidification accelerator for spraying the shotcrete.
  • this requires an additional work step and the processing of the powdered accelerator places high demands on the personnel and leads to a strong one
  • the invention has for its object to be able to process additives in a method for processing sprayed concrete by means of a spraying machine and a spraying machine of the type mentioned at the outset simply and without stability problems during concrete spraying.
  • the essence of the invention is therefore that at least one additive, which has a proportion of solids, is mixed with water in a mixing device and is supplied from the mixing device to the shotcrete before it emerges from the spray nozzle.
  • the advantages of the invention can be seen, inter alia, in the fact that, in the concrete spraying method according to the invention, the concrete additive (s) which have a certain solids content and in particular are in powder form are brought directly to the spraying machine, and there in each case only the required amounts of admixture directly with the corresponding amount Water can be mixed. This process involves deeper
  • the amount of admixture in the liquid admixture mixture supplied to the shotcrete can be adjusted very simply and thus allows the properties of the sprayed shotcrete to be tailored to requirements adapt. Furthermore, the liquid admixture mixture produced can have a higher concentration of active substances than conventional liquid admixtures, as a result of which the properties of the concrete produced can be improved. It is also advantageous that additives that were previously due to their
  • Stability-reducing effect could not be used, can be supplied to the shotcrete by the present method.
  • the viscosity By adjusting the viscosity of the liquid admixture mixture in the mixing device, the viscosity can be adjusted so that the admixture is distributed as best as possible in the shotcrete.
  • Figure 1 is a schematic representation of a spraying machine. 2 shows a schematic illustration of a mixing device according to the invention; Fig. 3 is a schematic representation of a further mixing device according to the invention. Only the elements essential for the immediate understanding of the invention are shown.
  • a spraying machine 1 is shown schematically and in a highly simplified manner in FIG. 1.
  • Such a machine comprises a water and compressed air supply 2, wheels 3 with a chassis, a filling funnel 4 for supplying the sprayed concrete, a hose line 5 and a spray nozzle 6 connected to the hose line.
  • the hose line 5 can also consist of tubes, but must be flexible at least in the area of the spray nozzle 6 so that the shotcrete can be applied.
  • another line 7 is on the
  • Spraying machine 1 is arranged, which opens into the hose line in the region of the spray nozzle 6. In the wet spraying process, air is mixed with additive via line 7 and in the dry spraying process, water is mixed with additive. On the injection molding machine 1 there is also a mixing device 8 for
  • Additional means arranged, which can be integrated directly into the machine 1 or can also be connected to the machine via lines (not shown).
  • the mixing device 8 and the associated parts of the spraying machine 1 are shown schematically.
  • the mixing device essentially comprises a storage container 10, a water supply 9 and a mixer 11.
  • Concrete additive 12 advantageously an accelerator, is filled into the storage container 10 in powder or granule form.
  • Such additives such as solidification accelerators, corrosion inhibitors, plasticizers, etc., are generally known.
  • Accelerators important, which are sold by Sika®, for example under the name Sigunit®.
  • the container 10 is advantageously provided with a tightly closing lid, so that no atmospheric moisture can reach the additive 12.
  • a metering device 13 for example a slide, or a metering screw, rotary feeder, etc., takes over the metering of the powdery additive 12 into the mixer 11. If the container 1 with the powdery additive 12 is arranged on a weighing device 14, the use of a is sufficient Slide for dosing. If a dosing screw is used as the dosing device, a weighing device 14 is not necessary.
  • Water is metered into the mixer 11 via the water supply 9 by means of a metering valve 15.
  • the water can also be temporarily stored in a container (not shown) and brought to a certain processing temperature there.
  • a container for example, wing mixers, dispersers or rotostators are used.
  • the resulting liquid admixture mixture can be a solution, a dispersion or a combination between a solution and a dispersion. This depends on the solubility of the additive used. Dispersions with less soluble additives should advantageously have a certain stability so as not to sediment if the spraying process is interrupted. Complete solutions are not absolutely necessary, as additives that are more difficult to dissolve in water can also lead to good results in shotcrete.
  • any amount of additive per se can be added to the water in the mixer.
  • the proportion of the powdery additive 12 in the water is usually 5 to 95% by weight, preferably 40 to 80% by weight, particularly preferably 40 to 60% by weight.
  • the liquid additive mixture obtained in this way can be pumped out of the mixer 11 and back into the mixer 11 by means of the mixing tools arranged in the mixer 11 through a circulation line 16, which improves the mixing.
  • a pump can also be arranged in the circulation line, which means that mixing tools may no longer have to be used in the mixer.
  • one or more heating devices can be arranged either in the water supply 9, in the intermediate water store (not shown), in the mixer 11 and / or in the line 16, by means of which the liquid additive mixture or the supplied water can be heated to higher temperatures, in particular a temperature above 40 ° C is heated in order to improve the solubility of the powder and to influence the viscosity of the liquid additive mixture.
  • the liquid admixture mixture is now fed to the line 7 which, depending on the spraying method, leads water or air to the spray nozzle.
  • a metering valve or a metering pump 18 can be arranged in the feed line 17, by means of which the amount of the liquid admixture mixture to be supplied to the shotcrete can be adjusted.
  • About 2 to 15% by weight of the liquid admixture mixture based on 100% by weight of the hydraulic binder in the shotcrete is supplied to the shotcrete.
  • the addition of the liquid admixture mixture is thus controlled by the throughput of the shotcrete and the proportion of hydraulic binder contained in it.
  • the mixing device is operated by a computer control and regulation system, not shown.
  • the respective quantities of water, powdery additive 12 and hydraulic binder can be determined via separate measuring devices / counters or directly by means of the metering device 13, the weighing device 14, the metering valve 15, the Dosing valve 18 and the amount of shotcrete or hydraulic binder supplied.
  • the desired mixing ratio can be set via the amount of additive 12 and water supplied to the mixer 11. If a certain amount of liquid admixture mixture is removed from the mixer by means of the metering valve 18, the amount withdrawn can be determined by the regulation by means of the opening time of the metering valve 18 or by a measuring device (not shown). In order to replace the withdrawn amount in the mixer, the mixer 11 is again supplied with the required amounts of additive 12 and water by the metering device 13 and the metering valve 15. Due to the storage volume of the mixer 11, the operating personnel also have some time to refill the container 10 if the additive has been used up or if the water supply is disrupted by the water supply, this has to be remedied.
  • the present method also allows the content of the powdery additive 12 in the water to be set as desired within the above-mentioned limits. In this way, you can react quickly if the content of hydraulic binder or shotcrete changes.
  • the volume of the mixer 11 usually being in a range from 1 to 80 liters. Due to the small amounts and the fact that only the required amounts of additive are liquefied, there are no problems with the stability of the liquid additive in the present process. Furthermore, the volume of the powdery admixture is at least a factor of two smaller than when using liquid admixtures, which results in lower transport costs and a lower environmental impact and the spraying machine can have smaller dimensions. 3, the mixer 11 and the circulation line 16 from FIG. 2 are replaced by a permanent mixer 19, for example an extruder. Such an extruder has at least one mixing and conveying screw.
  • a mixing rod with mixing elements can be used as the permanent mixer, which is arranged in a substantially horizontally arranged hollow cylinder.
  • the additive supplied via the metering device 13 and the water supplied via the water supply 9 are mixed in the permanent mixer and a solution and / or a dispersion is formed analogously to that described above.
  • the use of the metering pump 18 is not necessary here, since the extruder 19 takes over the conveying and metering of the liquid admixture mixture. Since a very good mixture is already achieved by the extruder 19, a circulation line is not necessary.
  • the extruder 19 can be heated in order to improve the solubility of the powder and to influence the viscosity of the liquid additive mixture.
  • the mixer or the extruder can also be replaced by components having the same or a similar effect. It is also possible to use a thickened additive or moist powder instead of the powdery additive, which is brought to the appropriate mixing contents with water in the mixing device. However, stability problems may need to be taken into account here.
  • the additive to be used for the invention should have a certain solids content of at least 1%, preferably over 10%, particularly preferably over 50%, in particular over 80%.
  • additives which are in themselves incompatible or, as mentioned above, slightly moist or liquid additives, in particular those without stability problems, and powdery additives can also be processed separately in the various mixing devices and supplied to the shotcrete.
  • multiple Mixing devices are then arranged parallel to one another and the liquid admixture mixtures are fed separately to the shotcrete or via a common line.
  • mixer 11 and permanent mixer 19 can also be combined in a mixing device and connected in parallel or in series.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne un procédé pour la mise en oeuvre de béton projeté au moyen d'une machine de projection (1). Selon ce procédé, il est possible d'amener des adjuvants (12) au béton projeté avant la sortie hors d'une buse de pulvérisation (6). Au moins un adjuvant (12), présentant une certaine teneur en matières solides, est mélangé à de l'eau dans un dispositif de mélange et est amené par ce dispositif de mélange au béton projeté avant la sortie hors de la buse de pulvérisation (6).
EP05707745A 2004-01-06 2005-01-06 Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection Withdrawn EP1704030A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05707745A EP1704030A1 (fr) 2004-01-06 2005-01-06 Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04000085 2004-01-06
PCT/EP2005/050045 WO2005065906A1 (fr) 2004-01-06 2005-01-06 Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection
EP05707745A EP1704030A1 (fr) 2004-01-06 2005-01-06 Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection

Publications (1)

Publication Number Publication Date
EP1704030A1 true EP1704030A1 (fr) 2006-09-27

Family

ID=34745843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707745A Withdrawn EP1704030A1 (fr) 2004-01-06 2005-01-06 Procede pour la mise en oeuvre de beton projete au moyen d'une machine de projection et machine de projection

Country Status (6)

Country Link
EP (1) EP1704030A1 (fr)
JP (1) JP2007516871A (fr)
CN (1) CN1910025B (fr)
AU (1) AU2005203893A1 (fr)
CA (1) CA2551288A1 (fr)
WO (1) WO2005065906A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101397848B (zh) * 2007-09-29 2010-09-01 李卫平 卧式喷浆机
DE102007060455A1 (de) 2007-12-12 2009-06-18 Deutsche Amphibolin-Werke Von Robert Murjahn Stiftung & Co. Kg Vorrichtung zum Durchmischen von Baumaterial
CN101519971B (zh) * 2009-03-28 2011-05-11 中国矿业大学 一种喷浆机供料装置
CN102712008A (zh) * 2010-01-21 2012-10-03 建筑研究和技术有限公司 使用热量回收的混凝土喷射方法
EP2436496A1 (fr) * 2010-10-01 2012-04-04 Sika Technology AG Dispositif de mélange pour mélanges aptes au pompage, en particulier pour béton projeté
ES2603412T3 (es) 2010-10-01 2017-02-27 Sika Technology Ag Aparato mezclador para mezclas bombeables y procedimiento referido a ello
EP2476530A1 (fr) * 2011-01-12 2012-07-18 Sika Technology AG Pièce auxiliaire et élément de boîtier pour un dispositif de mélange
DE102011102337A1 (de) * 2011-05-25 2012-11-29 Werner Sobek Vorrichtung und Verfahren zum Herstellen von Bauteilen mit zumindest einer kontinuierlichen Eigenschaftsänderung
CN103158199B (zh) * 2012-11-12 2015-07-01 湖南天雁机械有限责任公司 一种石膏浆料自动混合装置
CN102950654B (zh) * 2012-11-20 2015-04-22 广新海事重工股份有限公司 一种泥浆搅拌循环系统
CN108756939B (zh) * 2018-05-24 2024-08-16 陕西金石混凝土科技发展有限公司 喷射混凝土施工用受喷混凝土和速凝剂升温系统及方法
EP3708321A1 (fr) 2019-03-15 2020-09-16 Sika Technology Ag Système d'application d'un matériau de construction
DE102021104997A1 (de) 2021-03-02 2022-09-08 Wilhelm Tölke GmbH & Co KG Aufbereiter
JP7266661B1 (ja) 2021-11-24 2023-04-28 招平 吉永 コンクリート又はモルタル吹付システムにおける混合材料圧送装置

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FR2340775A1 (fr) * 1976-02-13 1977-09-09 Lambert Ind Machine a projeter
US4357110A (en) * 1979-09-17 1982-11-02 Hope Henry F Mixing apparatus
JPS583804B2 (ja) * 1980-07-12 1983-01-22 大平洋金属株式会社 積層式パンタイプミキサによるコンクリ−ト製造法
US4795263A (en) * 1985-02-13 1989-01-03 Sumitomo Corporation Method of producing concrete
IT1234140B (it) * 1989-04-26 1992-05-04 Bertolini C Sami Snc Mezzi e procedimento per la colorazione automatica del calcestruzzo

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Also Published As

Publication number Publication date
CA2551288A1 (fr) 2005-07-21
JP2007516871A (ja) 2007-06-28
WO2005065906A1 (fr) 2005-07-21
CN1910025A (zh) 2007-02-07
AU2005203893A1 (en) 2005-07-21
CN1910025B (zh) 2010-05-05

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