[go: up one dir, main page]

WO1997036839A1 - Addition d'accelerateurs de prise a de la gunite - Google Patents

Addition d'accelerateurs de prise a de la gunite Download PDF

Info

Publication number
WO1997036839A1
WO1997036839A1 PCT/NO1997/000082 NO9700082W WO9736839A1 WO 1997036839 A1 WO1997036839 A1 WO 1997036839A1 NO 9700082 W NO9700082 W NO 9700082W WO 9736839 A1 WO9736839 A1 WO 9736839A1
Authority
WO
WIPO (PCT)
Prior art keywords
gunite
mouthpiece
accelerator
aluminium
constituents
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.)
Ceased
Application number
PCT/NO1997/000082
Other languages
English (en)
Inventor
Olav Geir Tjugum
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.)
Individual
Original Assignee
Individual
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
Priority claimed from NO961277A external-priority patent/NO961277D0/no
Application filed by Individual filed Critical Individual
Priority to AU24135/97A priority Critical patent/AU2413597A/en
Publication of WO1997036839A1 publication Critical patent/WO1997036839A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • 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 present invention relates to an accelerator or an accelerator constituent for addition to gunite. Moreover, the invention relates to a method of adding an accelerator and/or consistency adjusting or solidification adjusting means to gunite, and equipment for adding an accelerator and/or consistency adjusting or solidification adjusting means to gunite during spraying, comprising a spray- mouthpiece and a conduit coupled to the mouthpiece for admission of gunite.
  • An accelerator is an additive which promotes curing of the concrete after spraying on a substrate. Liquid accelerator is added to the gunite immediately prior to spraying, by being admitted to a spray-mouthpiece for the gunite. Due to the use of an accelerator relatively thick layers can be sprayed, and the progress of the spraying may be faster than by spraying without any accelerator.
  • non-alkalic accelerators are used, for instance on basis of aluminium hydroxide, but these accelerators are not liquid. Although such powder accelerators can be used to prepare a liquid slurry and dosed i a liquid state, - there are large problems related to durability during storage and the application.
  • an accelerator or constituents in an accelerator can be used litium silicate and/or litium aluminate, and /or aluminium in acid or basic solution, with anions or cations which are not aggressive to concrete, and/or aluminium oxalate.
  • the accelerator may comprise aluminium formiate and aluminium nitrate, in the form of pure salts or mixtures.
  • accelerators By use of such accelerators alone, or mixed with sodium- or potassium silicate/sodium- or potassium aluminate, no or only a limited alkalic reaction in the concrete takes place.
  • These accelerators may, thus, be used alone or together with sodium silicate and/or sodium aluminate and/ or potassium silicate and/or potassium aluminate, whereby the addition of silicates or aluminates which cause alkalic reactions is eliminated or reduced.
  • the accelerator When the accelerator consists of or comprises oxalic acid or oxalate there will, when the accelerator is added to gunite, be formed potassium oxalate due to the potassium contents in the concrete.
  • the potassium oxalate constitutes a nearly inert filler substituent, which is heavily soluble.
  • the accelerator contains or consists of aluminium oxalate, aluminium iones are brought into the concrete.
  • the aluminium oxalate may form a part of an aqueous solution, which may also contain other aluminium salts which in small amounts do not have any detrimental effect, for instance sulfate or nitrate.
  • two or more accelerators are added selectively by being admitted to a spray mouthpiece for gunite in separate conduits, for adjusting of the rate of mixture between two or more -accelerators.
  • substituents may be added to the gunite prior to the reaching of the spray mouthpiece, in order that the constituents have more time to react prior to the spraying of the gunite.
  • viscosity- or consistency adjusters may be added, such as polyethylene oxides and small amounts of naphtalene sulphanates, for instance thixotropying means which by being added immediately prior to the spraying alter the consistency of the gunite from liquid and well pumpable and sprayable to viscous and thixotropic.
  • the equipment according to the invention is adapted for addition of selective amounts of two or more accelerators, consistency adjusters or solidification adjusters during spraying of gunite.
  • the equipment can permit addition to a spray mouthpiece and/or addition to the gunite prior to its arrival at the mouthpiece.
  • litium silicate or- aluminate, aluminium in solution or aluminium oxalate, respectively can be added alone when it is desired to avoid any alcaline silicium reaction on the aggegates.
  • litium silicate or- aluminate, or aluminium in solution, or aluminium oxalate may be added together with accelerators based on sodium or potassium, and the mixture rate can be determined automatically or by the spray operator.
  • the equipment according to the invention comprises a gunite spray mouthpiece, to which is coupled a conduit for admission of gunite, and to which are coupled two or more conduits for accelerator, possibly consistency adjusters or solidification adjusters, with means for selective adjustment of the flow in each conduit, for instance valves which can be controlled automatically or operated manually by an operator.
  • the spray mouthpiece may be extended rearwardly and be provided with one or more couplings spaced from the mouth of the mouthpiece, or one or more conduits may be provided with a coupling, which also is situated spaced from the mouth of the mouthpiece.
  • Fig. 1 shows spray equipment for selective addition of two accelerators.
  • Fig. 2 shows spray equipment for selective addition of three accelerators.
  • Each of the three examples of spray equipment according to the invention comprises a spray mouthpiece 1 , a mixing chamber 2, a supply conduit 3 for liquid concrete and a pressurized air conduit 4.
  • Fig. 1 shows two supply conduits 5, 7 for accelerator, with a control valve 6, 8 for each of the conduits 5, 7.
  • accelerators can be added selectively through the conduits 5 and 7.
  • One of the conduits 5, 7 can be shut off, for addition of only one accelerator, through the other conduit.
  • Fig. 2 also shows a supply conduit 9 coupled to the conduit 7, and the conduit 9 also has a control valve 10. This gives increased possibilities for selective addition.
  • One of the conduits 5, 7, 9 can be used for addition of a consistency adjusting means or a thixotropying means.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Medicinal Preparation (AREA)

Abstract

Cette invention concerne un accélérateur de prise ou un composant faisant office d'accélérateur de prise destiné à du béton pulvérisé composé de silicate de lithium et/ou d'aluminate de lithium et/ou d'aluminium en solution acide ou basique, associé à des anions ou des cations non agressifs vis à vis du béton et/ou d'oxalate d'aluminium. L'invention se rapporte à un procédé selon lequel on ajoute sélectivement au moins deux accélérateurs, et éventuellement un régulateur de concentration et un régulateur de prise, le long de conduits séparés alimentant une tuyère de pulvérisation du béton, ledit procédé permettant de réguler l'apport des accélérateurs en cours de pulvérisation. Cette invention concerne également un appareil permettant l'addition d'un accélérateur, de même qu'éventuellement l'addition d'un régulateur de concentration et d'un régulateur de prise, à du béton pulvérisé en cours de pulvérisation, ledit appareil comportant une tuyère de pulvérisation conçue pour le béton et dotée d'au moins deux conduits destinés auxdits additifs ainsi que d'organes permettant une régulation sélective de l'écoulement dans chacun des conduits, par exemple des vannes.
PCT/NO1997/000082 1996-03-29 1997-03-25 Addition d'accelerateurs de prise a de la gunite Ceased WO1997036839A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24135/97A AU2413597A (en) 1996-03-29 1997-03-25 Addition of accelerators in gunite

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO961277 1996-03-29
NO961277A NO961277D0 (no) 1996-03-29 1996-03-29 Akselerator for spröytebetong, og fremgangsmåte og utstyr for tilsetning til spröytebetong
NO962925A NO962925L (no) 1996-03-29 1996-07-12 Akselerator for spröytebetong, og fremgangsmåte og utstyr for tilsetning til spröytebetong
NO962925 1996-07-12

Publications (1)

Publication Number Publication Date
WO1997036839A1 true WO1997036839A1 (fr) 1997-10-09

Family

ID=26648653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000082 Ceased WO1997036839A1 (fr) 1996-03-29 1997-03-25 Addition d'accelerateurs de prise a de la gunite

Country Status (3)

Country Link
AU (1) AU2413597A (fr)
NO (1) NO962925L (fr)
WO (1) WO1997036839A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1095922A1 (fr) 1999-10-29 2001-05-02 Sika AG, vorm. Kaspar Winkler & Co. Accélérateurs de prise et de durcissement stabilisés à faible viscosité
US6251892B1 (en) 1997-02-28 2001-06-26 Gpi Nil Holdings, Inc. N-oxides of heterocyclic esters, amides, thioesters, and ketones
WO2013006662A1 (fr) * 2011-07-06 2013-01-10 Fmc Corporation Adjuvants pour béton à base de lithium pour lutter contre des réactions alcali-silice à commande amélioré de temps de prise
WO2014048871A1 (fr) * 2012-09-25 2014-04-03 Yara International Asa Composition antigel permettant la production d'un béton durable à basse température

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046357A (en) * 1976-12-03 1977-09-06 Construction Systems & Equipment, Inc. Shotcrete accelerator injection apparatus and method
EP0289721A2 (fr) * 1987-04-30 1988-11-09 Degussa Aktiengesellschaft Procédé et dispositif de dosage continu des matières pulvérulentes au moyen d'un gaz sous pression
US5246163A (en) * 1990-06-20 1993-09-21 Toagosei Chemical Industry Co., Ltd. Method of applying quick setting spray materials
DE19534929A1 (de) * 1994-09-20 1996-03-21 Sandoz Ag Rasche abbindende Zementzubereitungen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046357A (en) * 1976-12-03 1977-09-06 Construction Systems & Equipment, Inc. Shotcrete accelerator injection apparatus and method
EP0289721A2 (fr) * 1987-04-30 1988-11-09 Degussa Aktiengesellschaft Procédé et dispositif de dosage continu des matières pulvérulentes au moyen d'un gaz sous pression
US5246163A (en) * 1990-06-20 1993-09-21 Toagosei Chemical Industry Co., Ltd. Method of applying quick setting spray materials
DE19534929A1 (de) * 1994-09-20 1996-03-21 Sandoz Ag Rasche abbindende Zementzubereitungen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6251892B1 (en) 1997-02-28 2001-06-26 Gpi Nil Holdings, Inc. N-oxides of heterocyclic esters, amides, thioesters, and ketones
US6486151B2 (en) 1997-02-28 2002-11-26 Gpi Nil Holdings Inc. N-oxides of heterocyclic esters, amides, thioesters, and ketones
EP1095922A1 (fr) 1999-10-29 2001-05-02 Sika AG, vorm. Kaspar Winkler & Co. Accélérateurs de prise et de durcissement stabilisés à faible viscosité
WO2013006662A1 (fr) * 2011-07-06 2013-01-10 Fmc Corporation Adjuvants pour béton à base de lithium pour lutter contre des réactions alcali-silice à commande amélioré de temps de prise
WO2014048871A1 (fr) * 2012-09-25 2014-04-03 Yara International Asa Composition antigel permettant la production d'un béton durable à basse température
US9376342B2 (en) 2012-09-25 2016-06-28 Yara International Asa Antifreeze composition for producing a durable concrete in cold temperature conditions

Also Published As

Publication number Publication date
NO962925D0 (no) 1996-07-12
AU2413597A (en) 1997-10-22
NO962925L (no) 1997-09-30

Similar Documents

Publication Publication Date Title
CN102442794B (zh) 速凝剂及使用其的喷涂方法
US5356671A (en) Concrete spraying process
US4804563A (en) Method and apparatus for the spray placing of concrete layers
US6475275B1 (en) Cement composition
CA2035008C (fr) Compositions de grenite
US6780230B2 (en) Foamed fireproofing composition and method
EP1053088A1 (fr) Procede et systeme mobile de fabrication d'additif a ciment et d'adjuvant du beton
US5628940A (en) Process for applying low-cement castable refractory material
CA2470507A1 (fr) Procede et composition expansee d'ignifugation
JP2001130935A (ja) コンクリート急結剤
CN108025970A (zh) 用于制造和施用非硅酸盐水泥基材料的系统和方法
WO1997036839A1 (fr) Addition d'accelerateurs de prise a de la gunite
JP2009150108A (ja) 高速低粉塵吹付け施工方法
JPH06504493A (ja) 吹付けコンクリートマスにおける混和剤の混合方法およびその方法の施用のための薬剤
JP2007516871A (ja) スプレー装置によって噴出コンクリートを処理するための方法、ならびにスプレー装置
US20110250440A1 (en) Phosphate cement compositions using organic solvent retarders
WO2000048962A1 (fr) Procede de production continue d'un compose servant a couvrir des joints de plaques de platre
WO2022175865A1 (fr) Composé à joint de type à haute teneur en solides, pulvérisable, à prise rapide
JP2007177495A (ja) 低粉塵吹付け工法及びそのための吹付け装置
US2602759A (en) Method of applying plasterlike material to structures
JP2001181015A (ja) 高濃度ポリマー成膜工法および装置
JPH11240775A (ja) 吹き付け施工用耐火組成物およびその施工法
JP4484644B2 (ja) 吹付材及び吹付材の施工方法
EP0624699A2 (fr) Méthode et appareil pour appliquer par pulvérisation des compositions ignifugeantes
JP7261408B2 (ja) 乾式吹付け工法、噴射機

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG US UZ VN YU AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97535162

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase