SE513581C2 - Method for producing a formatted colored concrete structure as well as concrete structure prepared according to said method - Google Patents

Method for producing a formatted colored concrete structure as well as concrete structure prepared according to said method

Info

Publication number
SE513581C2
SE513581C2 SE9704289A SE9704289A SE513581C2 SE 513581 C2 SE513581 C2 SE 513581C2 SE 9704289 A SE9704289 A SE 9704289A SE 9704289 A SE9704289 A SE 9704289A SE 513581 C2 SE513581 C2 SE 513581C2
Authority
SE
Sweden
Prior art keywords
concrete
shotcrete
concrete structure
mold
surface layer
Prior art date
Application number
SE9704289A
Other languages
Swedish (sv)
Other versions
SE9704289L (en
SE9704289D0 (en
Inventor
Goeran Mellstroem
Original Assignee
Goeran Mellstroem
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 Goeran Mellstroem filed Critical Goeran Mellstroem
Priority to SE9704289A priority Critical patent/SE513581C2/en
Publication of SE9704289D0 publication Critical patent/SE9704289D0/en
Priority to PCT/SE1999/000869 priority patent/WO2000071316A1/en
Priority to AU49385/99A priority patent/AU4938599A/en
Publication of SE9704289L publication Critical patent/SE9704289L/en
Publication of SE513581C2 publication Critical patent/SE513581C2/en

Links

Classifications

    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/008—Producing shaped prefabricated articles from the material made from two or more materials having different characteristics or properties
    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
    • B28B1/32—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by projecting, e.g. spraying

Abstract

The present invention relates to a method for producing a formworked, coloured concrete structure, whereby a form is set up, and that form removal is effected when sufficient curing of the concrete structure has taken place. The invention also relates to a concrete structure produced in accordance with said method. When producing coloured concrete structures it is a common technique that concrete, coloured throughout, is used for the entire concrete structure. This is costly since coloured concrete is more expensive than uncoloured concrete and besides the casting properties of the concrete is affected negatively. The present invention is characterized in that a layer of shotcrete, coloured throughout, is applied on the inner side of the form, and that subsequently further concrete is supplied to the form, said further concrete adhering to the shotcrete.

Description

U 20 25 30 35 515 581 2 och lämnar ytan på betongen täckt med lösningen. När sedan lösningsmedlet avdunstar bildar polystyrenet en attraktiv glasyr på betongens yta. U 20 25 30 35 515 581 2 and leaves the surface of the concrete covered with the solution. When the solvent then evaporates, the polystyrene forms an attractive glaze on the surface of the concrete.

Uppfinningens syften och särdrag Föreliggande uppfinning har som sitt primära syfte att anvisa ett förfarande för att framställa färgade formsatta betongkonstruktioner, varvid endast ett ytskikt av betongkonstruktionen är genomfärgat, vilket ytskikt uppvisar en utomordentligt god hållfasthet. Ett ytterligare syfte med förfarandet enligt uppfinningen är att erhålla en utomordentligt god vidhäftning mellan det genomfärgade ytskiktet och resten av betongkonstruktionen. Ännu ett syfte med förfarandet enligt föreliggande uppfinning är att ytstrukturen hos en betongkonstruktion framställd medelst förfarandet enligt föreliggande uppfinning erhåller en motsvarande ytstruktur som hos en vanlig ofärgad betongkonstruktion.OBJECTS AND FEATURES OF THE INVENTION The present object of the present invention is to provide a method for producing colored molded concrete structures, wherein only one surface layer of the concrete structure is dyed through, which surface layer exhibits an extremely good strength. A further object of the method according to the invention is to obtain an exceptionally good adhesion between the through-colored surface layer and the rest of the concrete construction. Yet another object of the method of the present invention is that the surface structure of a concrete structure produced by the method of the present invention obtains a corresponding surface structure as of an ordinary uncoloured concrete structure.

Uppfinningens syften realiseras medelst ett förfarande och en betongkonstruktion som erhållit de i de efterföljande patentkraven angivna särdragen. Föredragna utföringsformer av uppfinningen är definierade i de osjälvständiga patentkraven.The objects of the invention are realized by means of a method and a concrete construction which have obtained the features stated in the following claims. Preferred embodiments of the invention are defined in the dependent claims.

Beskrivning av en föredragen utföringsform av uppfinningen Då en betongkonstruktion enligt uppfinningen skall framställas iordningställes först en form för sagda betongkonstruktion, dvs formsättning utföres. Efter det att fomsättningen är klar påföres på formens insida ett genomfârgat ytskikt av sprutbetong. Med sprutbetong skall i detta sammanhang förstås en betong som består av cement och fin ballast, dvs sand med en kornstorlek på vanligen 0-8 mm och vatten. Sprutbetongen kan vara oarmerad eller armerad, varvid armeringen vanligen består av fibrer av lämpligt material som blandas i sprutbetongen. Olika kemiska tillsatser kan även tillsättas sprutbetongen för att påverka dess egenskaper.Description of a preferred embodiment of the invention When a concrete structure according to the invention is to be manufactured, a mold for said concrete structure is first prepared, ie molding is carried out. After the preposition is complete, a colored surface layer of shotcrete is applied to the inside of the mold. In this context, shotcrete is meant a concrete that consists of cement and fine aggregate, ie sand with a grain size of usually 0-8 mm and water. The shotcrete can be unreinforced or reinforced, the reinforcement usually consisting of fibers of suitable material which are mixed in the shotcrete. Various chemical additives can also be added to the shotcrete to influence its properties.

Påförandet av sprutbetongen sker normalt på konventionellt sätt och medelst konventionell utrustning, exempelvis medelst ett sprutmunstycke, genom vilket en 10 20 25 30 35 513 581 3 trycksatt betongmassa bringas att passera. Inom ramen för uppfinningen kan man dock tänka sig att sprutbetongen appliceras på ett sätt som skiljer sig från det konventionella. Det ytskikt av sprutbetong som appliceras på formens insida har företrädesvis en tjocklek av 15-30 mm.The spray concrete is normally applied in a conventional manner and by means of conventional equipment, for example by means of a spray nozzle, through which a pressurized concrete mass is caused to pass. Within the scope of the invention, however, it is conceivable that the shotcrete is applied in a way that differs from the conventional one. The surface layer of shotcrete applied to the inside of the mold preferably has a thickness of 15-30 mm.

Något problem att få sprutbetongen att vidhäfta på formens insida föreligger normalt inte vare sig formens insida exempelvis utgöres av ohyvlat virke, s.k. råspont, plywood eller plåt. I detta sammanhang skall nämnas möjligheten att på formens insida anbringa matriser för att erhålla önskad ytstruktur.There is normally no problem in getting the shotcrete to adhere to the inside of the mold, whether the inside of the mold is, for example, unplaned wood, so-called raw board, plywood or sheet metal. In this context, mention should be made of the possibility of applying matrices to the inside of the mold in order to obtain the desired surface structure.

Att genomfärga sprutbetongen bereder normalt ej några problem då inblandning av ett färgpigment principiellt sker på samma sätt som då färgpigment tillsätts konventionell betong.Dyeing the shotcrete does not normally present any problems as mixing of a color pigment takes place in the same way as when color pigments are added to conventional concrete.

I detta sammanhang skall påpekas att den negativa effekt som inblandning av färgpigment har på betongens gjutegenskaper, se ovan under ”Teknikens ståndpunkt", ej har samma negativa effekt för sprutbetong då appliceringen av densamma sker under tryck och betongen slungas mot formen.In this context, it should be pointed out that the negative effect that admixture of color pigments has on the casting properties of the concrete, see above under "State of the art", does not have the same negative effect for shotcrete when it is applied under pressure and the concrete is thrown towards the mold.

Inom ramen för uppfinningen kan man även tänka sig att inblandningen av färgämnet i sprutbetongen sker på det sätt som beskrives i SE-B-397 940, dvs att sprutbetongen och färgämnet pàföres medelst separata munstycken, vilka är koncentriska relativt varandra.Within the scope of the invention, it is also conceivable that the mixing of the dye in the shotcrete takes place in the manner described in SE-B-397 940, ie that the shotcrete and the dye are applied by means of separate nozzles, which are concentric relative to each other.

Dä sprutbetongen har härdat till viss grad utföres armering i formen innanför ytskiktet om sådan ingår i betongkonstruktionen. I annat fall utgår detta arbetsmoment.When the shotcrete has hardened to a certain extent, reinforcement is carried out in the mold inside the surface layer if such is included in the concrete structure. Otherwise, this work step is deleted.

Om armering utföres är det viktigt att ytskiktet av sprutbetong får härda under erforderlig tid så att ytskiktet kan motstå de påkänningar som uppstår i samband med armeringen. Om exempelvis sprutbetong pàföres på formens botten måste ytskiktet där normalt motstå de pàkänningar som uppstår då de som utför armeringen går på sagda ytskikt.If reinforcement is carried out, it is important that the surface layer of shotcrete is allowed to harden for the required time so that the surface layer can withstand the stresses that arise in connection with the reinforcement. If, for example, shotcrete is applied to the bottom of the mold, the surface layer there must normally withstand the stresses that arise when those who perform the reinforcement walk on said surface layer.

Efter det att erforderlig härdning av sprutbetongen har skett och eventuell armering har utförts tillsätts ytterligare betong, vanligen konventionell ofärgad betongen, dvs formen fylls upp med sagda konventionella betong. Med betong skall i detta sammanhang förstås en massa bestående av cement, ballast (sten och grus), vatten samt lämpliga tillsatsmedel. Massan 10 15 20 25 30 35 513 581 4 blandas till en konsistens som gör den gjutbar, dvs flytegenskaper, transportstabilitet m.m. är viktiga parametrar hos betongen.After the required hardening of the shotcrete has taken place and any reinforcement has been carried out, additional concrete is added, usually conventional uncoloured concrete, ie the mold is filled with said conventional concrete. In this context, concrete shall mean a mass consisting of cement, aggregate (stone and gravel), water and suitable additives. The pulp is mixed to a consistency that makes it castable, ie flow properties, transport stability, etc. are important parameters of the concrete.

I detta sammanhang skall noteras att sprutbetongens inåtvànda yta är rå/grov då den ej utsättes för någon behandling utan får hårda med den ytstruktur som erhålles vid applicerandet av sprutbetongen. Detta har den positiva effekten att den konventionella ofärgade betongen får en bra vidhâftning mot den råa/grova ytan hos sprutbetongen då sagda konventionella ofärgade betong tillsättes formen. Efter det att den konventionella ofärgade betongen har tillsatts formen till önskad nivå tillåts den att hårda, varvid en genomhàrdad betongkonstruktion erhålles där kärnan består av konventionell ofärgad betong och ytskiktet består av genomfärgad sprutbetong. I detta sammanhang skall påpekas att sprutbetong generellt sett har ett lägre VCT-tal än konventionell betong som användes för gjutning. VCT-talet anger i princip betongens vatteninnehåll, varvid ett lågt VCT-tal innebär lågt vatteninnehåll. Det är ett välkänt faktum vid betongkonstruktioner att lågt vatteninnehåll ger en stark betong. Att betongkonstruktionen enligt föreliggande uppfinning har ett ytskikt av sprutbetong är således fördelaktigt då sagda ytskikt har en väl så hög hållfasthet som den konventionella betong som ingår i konstruktionen.In this context, it should be noted that the inward-facing surface of the shotcrete is raw / rough as it is not subjected to any treatment but gets hard with the surface structure obtained when applying the shotcrete. This has the positive effect that the conventional uncoloured concrete has a good adhesion to the raw / rough surface of the shotcrete when said conventional uncoloured concrete is added to the mold. After the conventional uncoloured concrete has been added to the mold to the desired level, it is allowed to harden, whereby a hardened concrete structure is obtained where the core consists of conventional uncoloured concrete and the surface layer consists of through-colored shotcrete. In this context, it should be pointed out that shotcrete generally has a lower VCT number than conventional concrete used for casting. The VCT number indicates in principle the water content of the concrete, whereby a low VCT number means low water content. It is a well-known fact in concrete constructions that low water content gives a strong concrete. That the concrete structure according to the present invention has a surface layer of shotcrete is thus advantageous as said surface layer has a strength as high as the conventional concrete included in the structure.

I andra sammanhang, exempelvis om förfarandet enligt uppfinningen tillämpas vid framställning av prefabricerade väggelement på fabrik där ytskiktet av sprutbetong ej utsättes för några nämnvärda påkänningar kan det räcka med betydligt kortare härdningstid för sagda ytskikt av sprutbetong. Man kan även tänka sig att den ytterligare betongen tillsätts innan sprutbetongen har härdat, vilket ökar vidhåftningen mellan sprutbetongen och den ytterligare betongen.In other contexts, for example if the method according to the invention is applied in the production of prefabricated wall elements in a factory where the surface layer of shotcrete is not subjected to any appreciable stresses, a considerably shorter curing time may be required for said surface layers of shotcrete. It is also conceivable that the additional concrete is added before the shotcrete has hardened, which increases the adhesion between the shotcrete and the additional concrete.

Eftersom sprutbetongen på sin utsida anligger mot formens insida erhålles vid avformning en utvändig yta som har en motsvarande struktur som om genomfärgad betong använts till hela betongkonstruktionen.Since the shotcrete on its outside abuts against the inside of the mold, an external surface is obtained during demolding which has a corresponding structure as if through-colored concrete was used for the entire concrete structure.

Då enligt föreliggande uppfinning endast ett ytskikt av betongkonstruktionen är genomfärgad inses att väsentliga kostnadsbesparingar göres med föreliggande uppfinning jämfört 10 513 581 5 med konventionell teknik, dvs att hela betongkonstruktionen genomfärgas. Merkostnaden för att erhålla en färgad betongkonstruktion torde kunna reduceras med åtminstone 50% med tillämpning av föreliggande uppfinning.Since according to the present invention only one surface layer of the concrete structure is dyed, it will be appreciated that significant cost savings are made with the present invention compared to conventional technology, i.e. that the entire concrete structure is dyed through. The additional cost of obtaining a colored concrete structure should be able to be reduced by at least 50% with the practice of the present invention.

Uppfinningen är generellt applicerbar pà en mängd olika betongkonstruktioner där ett genomfärgat ytskikt önskas. I exemplifierande men ej begränsande syfte kan nämnas platsgjutna betongkonstruktioner likväl som prefabricerade betongkonstruktioner. Olika tänkbara applikationsomràden är exempelvis broar, stödmurar, väggelement. Naturligtvis kan uppfinningen även tillämpas endast pà en del eller delar av en betongkonstruktion. Uppfinningen kan säledes fritt varieras inom ramen för de efterföljande patentkraven.The invention is generally applicable to a variety of concrete structures where a through-colored surface layer is desired. For exemplary but non-limiting purposes, cast-in-place concrete structures as well as prefabricated concrete structures can be mentioned. Various possible application areas are, for example, bridges, retaining walls, wall elements. Of course, the invention can also be applied only to a part or parts of a concrete structure. The invention can thus be freely varied within the scope of the appended claims.

Claims (10)

10 20 25 30 35 513 581 Patentkrav10 20 25 30 35 513 581 Patent claims 1. Förfarande för att framställa en formsatt färgad betongkonstruktion, varvid en form iordningställes, och att avformning sker efter det att erforderlig härdning av betongkonstruktionen har skett, k ä n n e t e c k n a t av att på formens insida appliceras ett genomfärgat skikt av sprutbetong, och att därefter ytterligare betong tillföres formen under vidhäftning mot sprutbetongen.A method for producing a molded colored concrete structure, wherein a mold is prepared, and that molding takes place after the required hardening of the concrete structure has taken place, characterized in that a through-colored layer of shotcrete is applied to the inside of the mold, and that further concrete is subsequently applied. is added to the mold while adhering to the shotcrete. 2. Förfarande enligt krav 1, k ä n n e t e c k n a t av att den ytterligare betongen tillföres formen efter det att sprutbetongen har härdat i erforderlig grad.Method according to claim 1, characterized in that the additional concrete is added to the mold after the shotcrete has hardened to the required degree. 3. Förfarande enligt krav 1 eller 2, k ä n n e t e c k n a t av att den ytterligare betongen utgöres av ofärgad standardbetong.Process according to Claim 1 or 2, characterized in that the additional concrete consists of uncoloured standard concrete. 4. Förfarande enligt krav 2 eller 3, k ä n n e t e c k n a t av att armering utföres efter det att sprutbetongskiktet har härdat, i erforderlig omfattning, och före det att ytterligare betong tillföres formen.4. A method according to claim 2 or 3, characterized in that reinforcement is carried out after the shotcrete layer has hardened, to the required extent, and before additional concrete is added to the mold. 5. Förfarande enligt nàgot av kraven 1-4, k ä n n e t e c k n a t av att den ytterligare betongen vibreras efter det att den tillförts formen.A method according to any one of claims 1-4, characterized in that the additional concrete is vibrated after it has been added to the mold. 6. Formsatt färgad betongkonstruktion, k ä n n e t e c k n a d av att den innefattar ett genomfärgat ytskikt av sprutbetong som under framställningen av sagda betongkonstruktion applicerats på insidan av formen, och att den ytterligare betong som ingår i sagda betongkonstruktion vidhäftar mot ytskiktet av sprutbetong.6. Shaped colored concrete structure, characterized in that it comprises a through-colored surface layer of shotcrete which has been applied to the inside of the mold during the production of said concrete structure, and that the additional concrete included in said concrete structure adheres to the surface layer of shotcrete. 7. Betongkonstruktion enligt krav 6, k ä n n e t e c k n a d av att ytskiktet av sprutbetong är oarmerat eller armerat. 10 513 581 77. Concrete construction according to claim 6, characterized in that the surface layer of shotcrete is unreinforced or reinforced. 10 513 581 7 8. Betongkonstruktion enligt krav 6 eller 7, k ä n n e t e c k n a d av att den ytterligare betongen utgöres av ofärgad standardbetong.Concrete structure according to claim 6 or 7, characterized in that the additional concrete consists of uncoloured standard concrete. 9. Betongkonstruktion enligt något av kraven 6-8, k à n n e t e c k n a d av att den ytterligare betongen är oarmerad eller armerad.Concrete structure according to one of Claims 6 to 8, characterized in that the additional concrete is unreinforced or reinforced. 10. Betongkonstruktion enligt nàgot av kraven 6-9, k ä n n e t e c k n a d av att ytskiktet av sprutbetong har en tjocklek av 15-30 mm.Concrete construction according to any one of claims 6-9, characterized in that the surface layer of shotcrete has a thickness of 15-30 mm.
SE9704289A 1997-11-24 1997-11-24 Method for producing a formatted colored concrete structure as well as concrete structure prepared according to said method SE513581C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9704289A SE513581C2 (en) 1997-11-24 1997-11-24 Method for producing a formatted colored concrete structure as well as concrete structure prepared according to said method
PCT/SE1999/000869 WO2000071316A1 (en) 1997-11-24 1999-05-21 Method for producing a formworked coloured concrete structure and a concrete structure produced in accordance with said method
AU49385/99A AU4938599A (en) 1997-11-24 1999-05-21 Method for producing a formworked coloured concrete structure and a concrete structure produced in accordance with said method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9704289A SE513581C2 (en) 1997-11-24 1997-11-24 Method for producing a formatted colored concrete structure as well as concrete structure prepared according to said method
PCT/SE1999/000869 WO2000071316A1 (en) 1997-11-24 1999-05-21 Method for producing a formworked coloured concrete structure and a concrete structure produced in accordance with said method

Publications (3)

Publication Number Publication Date
SE9704289D0 SE9704289D0 (en) 1997-11-24
SE9704289L SE9704289L (en) 1999-05-25
SE513581C2 true SE513581C2 (en) 2000-10-02

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SE9704289A SE513581C2 (en) 1997-11-24 1997-11-24 Method for producing a formatted colored concrete structure as well as concrete structure prepared according to said method

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AU (1) AU4938599A (en)
SE (1) SE513581C2 (en)
WO (1) WO2000071316A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2113352B1 (en) * 2008-04-30 2013-03-27 H+H International A/S Method for manufacturing a building element made of porous concrete
DK177523B1 (en) * 2011-07-19 2013-09-02 Gb Holding Hoejbjerg Aps Method of manufacturing a high strength concrete plate member having a superior surface, as well as a high strength concrete panel manufactured by said method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE302911B (en) * 1965-12-30 1968-08-05 Silbeto Ab
SE320474B (en) * 1966-10-27 1970-02-09 Incentive Ab
SE397940B (en) * 1976-02-19 1977-11-28 Euroc Administration Ab METHOD AND DEVICE FOR MIXING A FINELY LIQUID BINDER AND A PARTICULAR ADDITIONAL
EP0169022B1 (en) * 1984-07-18 1990-09-19 Ozawa Concrete Industry Co. Ltd. Concrete structural member and method for manufacture thereof
SE501129C2 (en) * 1993-06-18 1994-11-21 Delcon Ab Concrete Dev Methods of manufacturing concrete structures with a surface protection and concrete structure prepared according to the method

Also Published As

Publication number Publication date
SE9704289L (en) 1999-05-25
AU4938599A (en) 2000-12-12
SE9704289D0 (en) 1997-11-24
WO2000071316A1 (en) 2000-11-30

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