SE451067B - Accelerating hardening of concrete - Google Patents
Accelerating hardening of concreteInfo
- Publication number
- SE451067B SE451067B SE8002613A SE8002613A SE451067B SE 451067 B SE451067 B SE 451067B SE 8002613 A SE8002613 A SE 8002613A SE 8002613 A SE8002613 A SE 8002613A SE 451067 B SE451067 B SE 451067B
- Authority
- SE
- Sweden
- Prior art keywords
- curing
- concrete
- carbonation
- dewatering
- dehumidification
- Prior art date
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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/247—Controlling the humidity during curing, setting or hardening
-
- 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
- C04B40/0089—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of vacuum or reduced pressure
-
- 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
- C04B40/02—Selection of the hardening environment
- C04B40/0231—Carbon dioxide hardening
-
- 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
- C04B40/02—Selection of the hardening environment
- C04B40/0254—Hardening in an enclosed space, e.g. in a flexible container
-
- 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
- C04B40/02—Selection of the hardening environment
- C04B40/0272—Hardening under vacuum or reduced pressure
-
- 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
Abstract
Description
15 20 25 30 35 451 067 2 den yttre miljön och dels materialets porstruktur på mate- rialets uttorkning före och under karbonatiseringsproces- sen. 15 20 25 30 35 451 067 2 the external environment and partly the pore structure of the material on the drying of the material before and during the carbonation process.
Följande yttre faktorer påverkar uttorkningen av ma- terialet; dess temperatur, luftens rörelse, omgivningens temperatur och luftens relativa fuktighet samt eventuell koldioxidgas rörelse. Rätt avpassning av dessa faktorer möjliggör ett optimalt karbonatiseringsförfarande.The following external factors affect the drying of the material; its temperature, the movement of the air, the ambient temperature and the relative humidity of the air as well as any movement of carbon dioxide gas. Proper adjustment of these factors enables an optimal carbonation process.
För materialet eftersträvas ett lågt vattenbindetal, lämpligt avpassat bindemedel (företrädesvis cement), lämp- lig porositet, vilket måste avvägas mot önskad hållfast- het, m m. För att få en snabb karbonatiseringsprocess måste också koldioxid lätt kunna absorberas av materialet.The material is sought for a low water bond number, suitably matched binder (preferably cement), suitable porosity, which must be weighed against the desired strength, etc. In order to have a fast carbonation process, carbon dioxide must also be easily absorbed by the material.
Uppfinningen avser således ett sätt att snabbhärda betong eller andra liknande gjutmaterial genom karbonati- sering. Sättet kännetecknas av att ett kapillärsystem ska- pas i materialet, att ett lufttätt, slutet system åstad- koms kring materialet, att materialet utsätts för under- tryck och att kapillärsystemet uttorkas före och under karbonatiseringen genom kontinuerlig avfuktning under styrda konditioner i det slutna systemet i form av luft- cirkulering i det slutna systemet och avfuktning av den cirkulerande luften, varvid materialets utsättande för' undertryck, karbonatiseringen och luftcirkuleringen alla sker i det lufttäta, slutna systemet.The invention thus relates to a method of fast-curing concrete or other similar casting materials by carbonation. The method is characterized in that a capillary system is created in the material, that an airtight, closed system is created around the material, that the material is subjected to negative pressure and that the capillary system is dried before and during the carbonation by continuous dehumidification under controlled conditions in the closed system. in the form of air circulation in the closed system and dehumidification of the circulating air, the material being subjected to negative pressure, carbonation and air circulation all taking place in the airtight, closed system.
Andra sätt och utrustningar för att snabbhärda betongmaterial finns beskrivna i US-patenten 4 ll7 059, 4 117 060 samt 3 492 385.Other methods and equipment for fast curing concrete materials are described in U.S. Patents 4,117,059, 4,117,060 and 3,492,385.
I US-patentet 4 ll7 060 beskrivs ett sätt att snabbhärda betong, som har uttorkats genom relativ torr blandning, där vinyl och acetatdibutyl sampolymi- serat ingår, och utsätts för tryck i en form, varefter koldioxidgas tillförs blandningen genom formen. Effekten av detta sätt är beroende av den avvattning som delvis sker genom polymertillsatsen. Någon specifik lösning av avfuktningsproblemet visas icke. 10 15 20 25 30 35 451 067 3 US-patentet 4 117 059 bygger på samma idé som US-pa- tentet 4 117 060, men som härdningsutrymmen utnyttjas en öppen kammare för att åstadkomma en kontinuerlig tillverkning av betongprodukter eller liknande. Kol- dioxidgasen tillförs här i kammaren i stället för till formen enligt US-patentet 4 117 060.U.S. Pat. The effect of this method depends on the dewatering that takes place in part through the polymer addition. No specific solution to the dehumidification problem is shown. U.S. Patent 4,117,059 is based on the same idea as U.S. Patent 4,117,060, but as curing spaces, an open chamber is used to provide continuous production of concrete products or the like. The carbon dioxide gas is supplied here in the chamber instead of to the mold according to U.S. Patent 4,117,060.
I den redovisade processen påpekas att kammarens höjd i förhållande till produktens tjocklek är direkt avgörande för härdningens resultat. Dessutom framhålls, att de angivna polymererna är nödvändiga för att snabb- hårdning skall erhållas enligt det redovisade sättet och skiljer således väsentligt från föreliggande upp- finning.In the reported process, it is pointed out that the height of the chamber in relation to the thickness of the product is directly decisive for the hardening results. In addition, it is emphasized that the stated polymers are necessary for rapid curing to be obtained according to the method described and thus differ significantly from the present invention.
I US-patentet 3 492 385 visas ett sätt att påskynda härdningen genom att betongelementen i sina formar förs vertikalt genom omväxlande kalla och varma zoner med en koldioxidanrikad atmosfär. Vid detta sätt finns inga lösningar för avvattnings- och avfuktningsprob- lematiken.U.S. Pat. No. 3,492,385 discloses a method of accelerating curing by passing the concrete elements in their molds vertically through alternating cold and hot zones with a carbon dioxide-enriched atmosphere. In this way, there are no solutions to the drainage and dehumidification problems.
Väsentligt för föreliggande uppfinning är således att de faktorer, som påverkar härdningsförloppet, kan regleras så att de verkar gemensamt eller var för'sig eller i olika kombinationer samtidigt eller förskjutna i tiden i förhållande till varandra samt anpassas till elementens form och struktur, så att optimala härdningsbetingelser uppnås.It is essential for the present invention that the factors which influence the curing process can be regulated so that they act jointly or separately or in different combinations simultaneously or staggered in time relative to each other and are adapted to the shape and structure of the elements, so that optimal curing conditions are achieved.
En anordning för tillämpning av sättet innehåller erforderlig konditioneringsutrustning, dvs värmekälla, fläkt och avfuktare (t ex salt eller kondensanordning), regleringsanordning för konditioneringen samt vakuum- utrustning och utrustning för koldioxidtillförsel.A device for applying the method contains the required conditioning equipment, ie heat source, fan and dehumidifier (eg salt or condensing device), control device for the conditioning and vacuum equipment and equipment for carbon dioxide supply.
Denna anordning kan anslutas till följande alternativa härdningsutrymmen: sluten form, paket av slutna formar, sluten kammare eller liknande härdningsutrymmen.This device can be connected to the following alternative curing spaces: closed mold, package of closed molds, closed chamber or similar curing spaces.
I en sluten form, bestående av en enstaka form, paket av formar vertikalt eller horisontellt samman- satta, kan man efter det att formen (formarna) fyllts 10 15 20 25 30 451 067 4 med gjutmaterialet, först avvattna massan med vakuumsug och samtidigt eller omedelbart efter vakuumbehandlingen införa koldioxid med bibehållande av ett visst under- tryck i massan. Efter koldioxidtillförseln tillförs värme medelst fläkt så att en sluten luftcirkulation uppstår för att möjliggöra avfuktning av den cirkule- rade luften genom salter eller kondens. Alternativt kan en viss mängd koldioxid även tillföras under värme- behandlingen.In a closed mold, consisting of a single mold, packages of molds vertically or horizontally assembled, after the mold (s) are filled with the casting material, one can first dewater the mass with vacuum suction and at the same time or Immediately after the vacuum treatment, introduce carbon dioxide while maintaining a certain negative pressure in the pulp. After the carbon dioxide supply, heat is supplied by means of a fan so that a closed air circulation occurs to enable dehumidification of the circulated air through salts or condensation. Alternatively, a certain amount of carbon dioxide can also be added during the heat treatment.
Ett annat alternativ vid sluten form är att i ovannämnda förfarande införs koldioxid efter det att avvattning skett genom vakuumbehandling samtidigt med att värmefläkten och avfuktningen aktiveras.Another alternative in closed form is that in the above-mentioned process carbon dioxide is introduced after dewatering has taken place by vacuum treatment at the same time as the heating fan and dehumidification are activated.
I ett härdningssystem med sluten kammare införs i all- mänhet pressat och vattenfattigt. Sättet att tillämpa det formade materialet, med eller utan form, uppfinningen sker därvid företrädesvis genom att först uttorka och avfukta det införda materialet genom använ- dande av värmefläkt och avfuktningsutrustningen, var- efter materialet vakuumsugs. Vid bibchållet undertryck i kammaren införs därefter koldioxiden.In a curing system with a closed chamber, pressure is generally introduced and water-poor. The method of applying the molded material, with or without mold, the invention preferably takes place by first drying and dehumidifying the introduced material by using a heating fan and the dehumidification equipment, after which the material is vacuum-sucked. At low pressure in the chamber, carbon dioxide is then introduced.
Av bifogade figur framgår hur uppfinningen kan komhincras med olika typer av härdningsutrymmen.The attached figure shows how the invention can be combined with different types of curing spaces.
Prov av sättet enligt uppfinningen har utförts på fasadsten av betong. Förutsättningar för proven och dess resultat blev följande: 1. Cement 1, sand 2,7, vct 0,31 vatten 0,3 utgångstemperatur 20 - 23°C vakuum undertryck 0,5 bar, 10 min C02-gas temperatur 24 - 34°C, tryck O,l bar ' avfuktning, varmluftscirkulation 24 - 3S°C härdningstid 42 min, densitet 2,1 hållfasthet medelvärde 30 MPa 2. Samma som ovan med tillsatsmedel hållfasthet 18,9 MPa (polymerer) 451 067 5 Materialförutsättningar samma som ovan under 1.Tests of the method according to the invention have been carried out on concrete facades. Conditions for the tests and their results were as follows: 1. Cement 1, sand 2.7, vct 0.31 water 0.3 initial temperature 20 - 23 ° C vacuum negative pressure 0.5 bar, 10 min CO 2 gas temperature 24 - 34 ° C, pressure 0.1 bar 'dehumidification, hot air circulation 24 - 3S ° C curing time 42 min, density 2.1 strength average 30 MPa 2. Same as above with additive strength 18.9 MPa (polymers) 451 067 5 Material conditions same as above under 1.
Ej vakuum, koldioxidgas tryck 0,1 bar temperatur 23 - 32°C, avfuktning, varmluftscirkulation 24 - 34°C, härdningstid 34 min, densitet 2,1, håll- fasthet medelvärde 24,3 MPa.Non-vacuum, carbon dioxide gas pressure 0.1 bar temperature 23 - 32 ° C, dehumidification, hot air circulation 24 - 34 ° C, curing time 34 min, density 2.1, strength average 24.3 MPa.
Samma som under 3 med tillsatsmedel (polymerer) hållfasthet 18,1 MPa.Same as under 3 with additives (polymers) strength 18.1 MPa.
Claims (2)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8002613A SE451067B (en) | 1980-04-08 | 1980-04-08 | Accelerating hardening of concrete |
CA000375225A CA1185078A (en) | 1980-04-08 | 1981-04-10 | Method and device for rapid hardening of concrete |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8002613A SE451067B (en) | 1980-04-08 | 1980-04-08 | Accelerating hardening of concrete |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8002613L SE8002613L (en) | 1982-03-19 |
SE451067B true SE451067B (en) | 1987-08-31 |
Family
ID=20340689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8002613A SE451067B (en) | 1980-04-08 | 1980-04-08 | Accelerating hardening of concrete |
Country Status (2)
Country | Link |
---|---|
CA (1) | CA1185078A (en) |
SE (1) | SE451067B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8845940B2 (en) | 2012-10-25 | 2014-09-30 | Carboncure Technologies Inc. | Carbon dioxide treatment of concrete upstream from product mold |
US9108883B2 (en) | 2013-06-25 | 2015-08-18 | Carboncure Technologies, Inc. | Apparatus for carbonation of a cement mix |
US9376345B2 (en) | 2013-06-25 | 2016-06-28 | Carboncure Technologies Inc. | Methods for delivery of carbon dioxide to a flowable concrete mix |
US9388072B2 (en) | 2013-06-25 | 2016-07-12 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US9738562B2 (en) | 2013-06-25 | 2017-08-22 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US9790131B2 (en) | 2013-02-04 | 2017-10-17 | Carboncure Technologies Inc. | System and method of applying carbon dioxide during the production of concrete |
US10350787B2 (en) | 2014-02-18 | 2019-07-16 | Carboncure Technologies Inc. | Carbonation of cement mixes |
US10570064B2 (en) | 2014-04-07 | 2020-02-25 | Carboncure Technologies Inc. | Integrated carbon dioxide capture |
US10927042B2 (en) | 2013-06-25 | 2021-02-23 | Carboncure Technologies, Inc. | Methods and compositions for concrete production |
US11660779B2 (en) | 2016-04-11 | 2023-05-30 | Carboncure Technologies Inc. | Methods and compositions for treatment of concrete wash water |
US11958212B2 (en) | 2017-06-20 | 2024-04-16 | Carboncure Technologies Inc. | Methods and compositions for treatment of concrete wash water |
-
1980
- 1980-04-08 SE SE8002613A patent/SE451067B/en not_active IP Right Cessation
-
1981
- 1981-04-10 CA CA000375225A patent/CA1185078A/en not_active Expired
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9492945B2 (en) | 2012-10-25 | 2016-11-15 | Carboncure Technologies Inc. | Carbon dioxide treatment of concrete upstream from product mold |
US10654191B2 (en) | 2012-10-25 | 2020-05-19 | Carboncure Technologies Inc. | Carbon dioxide treatment of concrete upstream from product mold |
US8845940B2 (en) | 2012-10-25 | 2014-09-30 | Carboncure Technologies Inc. | Carbon dioxide treatment of concrete upstream from product mold |
US10683237B2 (en) | 2013-02-04 | 2020-06-16 | Carboncure Technologies Inc. | System and method of applying carbon dioxide during the production of concrete |
US9790131B2 (en) | 2013-02-04 | 2017-10-17 | Carboncure Technologies Inc. | System and method of applying carbon dioxide during the production of concrete |
US9738562B2 (en) | 2013-06-25 | 2017-08-22 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US11773019B2 (en) | 2013-06-25 | 2023-10-03 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US9758437B2 (en) | 2013-06-25 | 2017-09-12 | Carboncure Technologies Inc. | Apparatus for delivery of carbon dioxide to a concrete mix in a mixer and determining flow rate |
US9463580B2 (en) | 2013-06-25 | 2016-10-11 | Carboncure Technologies Inc. | Methods for carbonation of a cement mix in a mixer |
US10246379B2 (en) | 2013-06-25 | 2019-04-02 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US9388072B2 (en) | 2013-06-25 | 2016-07-12 | Carboncure Technologies Inc. | Methods and compositions for concrete production |
US11773031B2 (en) | 2013-06-25 | 2023-10-03 | Carboncure Technologies Inc. | Apparatus for delivery of a predetermined amount of solid and gaseous carbon dioxide |
US9376345B2 (en) | 2013-06-25 | 2016-06-28 | Carboncure Technologies Inc. | Methods for delivery of carbon dioxide to a flowable concrete mix |
US9108883B2 (en) | 2013-06-25 | 2015-08-18 | Carboncure Technologies, Inc. | Apparatus for carbonation of a cement mix |
US10927042B2 (en) | 2013-06-25 | 2021-02-23 | Carboncure Technologies, Inc. | Methods and compositions for concrete production |
US10350787B2 (en) | 2014-02-18 | 2019-07-16 | Carboncure Technologies Inc. | Carbonation of cement mixes |
US10570064B2 (en) | 2014-04-07 | 2020-02-25 | Carboncure Technologies Inc. | Integrated carbon dioxide capture |
US11878948B2 (en) | 2014-04-07 | 2024-01-23 | Carboncure Technologies Inc. | Integrated carbon dioxide capture |
US11660779B2 (en) | 2016-04-11 | 2023-05-30 | Carboncure Technologies Inc. | Methods and compositions for treatment of concrete wash water |
US11958212B2 (en) | 2017-06-20 | 2024-04-16 | Carboncure Technologies Inc. | Methods and compositions for treatment of concrete wash water |
Also Published As
Publication number | Publication date |
---|---|
CA1185078A (en) | 1985-04-09 |
SE8002613L (en) | 1982-03-19 |
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