NO20111524A1 - Curing accelerator and a method for accelerating the curing of hydraulic binders and mixtures thereof - Google Patents
Curing accelerator and a method for accelerating the curing of hydraulic binders and mixtures thereof Download PDFInfo
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- NO20111524A1 NO20111524A1 NO20111524A NO20111524A NO20111524A1 NO 20111524 A1 NO20111524 A1 NO 20111524A1 NO 20111524 A NO20111524 A NO 20111524A NO 20111524 A NO20111524 A NO 20111524A NO 20111524 A1 NO20111524 A1 NO 20111524A1
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- accelerator
- fly ash
- concrete
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- thiocyanate
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- 239000011230 binding agent Substances 0.000 title claims abstract description 38
- 239000000203 mixture Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 5
- 239000010881 fly ash Substances 0.000 claims abstract description 33
- 239000011398 Portland cement Substances 0.000 claims abstract description 23
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 claims abstract description 13
- 229920005862 polyol Polymers 0.000 claims abstract description 11
- 150000003077 polyols Chemical class 0.000 claims abstract description 11
- 239000004567 concrete Substances 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 7
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical class OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- -1 alkaline earth metal thiocyanate Chemical class 0.000 claims description 3
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical group [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims description 3
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical group OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 235000011187 glycerol Nutrition 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000010754 BS 2869 Class F Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012615 aggregate Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 150000001414 amino alcohols Chemical class 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- NJTGANWAUPEOAX-UHFFFAOYSA-N molport-023-220-454 Chemical compound OCC(O)CO.OCC(O)CO NJTGANWAUPEOAX-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical group [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
Classifications
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- 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
- C04B40/0039—Premixtures of 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
- 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
- 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
- C04B28/04—Portland cements
-
- 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
- C04B2103/12—Set accelerators
-
- 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
- C04B2103/14—Hardening accelerators
-
- 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
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/1062—Halogen free or very low halogen-content materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Beskrevet her er en ny herdningsakselerator inkludert minst ett uorganisk tiocyanat, minst ett alkanolamin, minst ett organisk polyol og eventuelt vann som akselererer hardningen av hydrauliske bindemidler inneholdende portlandsement og spesielt portlandsement med høyt innhold av flygeaske. Også beskrevet her er en fremgangsmåte for å akselerere hardningen av hydrauliske bindemidler eller blandinger som inneholdende hydrauliske bindemidler.Described here is a new curing accelerator including at least one inorganic thiocyanate, at least one alkanolamine, at least one organic polyol, and optionally water accelerating the hardening of hydraulic binders containing Portland cement and especially Portland cement with a high content of fly ash. Also described herein is a method of accelerating the hardening of hydraulic binders or mixtures containing hydraulic binders.
Description
Oppfinnelsesområde Field of invention
Foreliggende oppfinnelse vedrører en kloridfri herdningsakselerator og en fremgangsmåte for å akselerere herdningen av hydrauliske bindemidler, spesielt for portlandsement og flygeaske hvor en stor del av portlandsementen er erstattet med flygeaske og blandinger som inneholder hydrauliske bindemidler, særlig for mørtel og betong. Herdningsakseleratoren brukes i produksjon av prefabrikkerte elementer og for å få kunne akselerere betongfremstillingen på en byggeplass. The present invention relates to a chloride-free hardening accelerator and a method for accelerating the hardening of hydraulic binders, especially for portland cement and fly ash where a large part of the portland cement is replaced with fly ash and mixtures containing hydraulic binders, especially for mortar and concrete. The hardening accelerator is used in the production of prefabricated elements and to be able to accelerate the production of concrete on a construction site.
Bakgrunn for oppfinnelsen Background for the invention
Portlandsement er et hydraulisk bindemiddel som vanligvis blir brukt til bygging av konstruksjoner. Portlandsement omfatter hovedsakelig en blanding av kalsiumsilikat- og kalsiumaluminatmineraler som kan reagere med vann og danne en tett og fast pasta. Ved bruk som bindemiddel for betong har portlandsement imidlertid noen ulemper. Materialer som inneholder portlandsement kan brytes ned ved sulfatangrep fra sjøvann eller drensvann. Stålarmeringen i forsterket Portlandbetong er korrosiv når pH i systemet er under et visst nivå. Portlandsement med høyt alkalinivå kan sammen med reaktiv tilslag (sand/stein) forårsake alkali-silika-reaksjoner i materialene som fører til sprekker og degraderer betongen. I tillegg har portlandsement en raskere utvikling av hydratasjonsvarme enn andre typer sementer, og derfor er ikke denne sementen egnet til bruk ved enkelte miljøer. For eksempel i varmt klima kan den høye hydratasjonsvarmen føre til sprekker når Portlandsement anvendes. Portland cement is a hydraulic binder that is usually used for the construction of structures. Portland cement mainly comprises a mixture of calcium silicate and calcium aluminate minerals which can react with water to form a dense and firm paste. However, when used as a binder for concrete, Portland cement has some disadvantages. Materials containing Portland cement can break down due to sulphate attack from seawater or drainage water. The steel reinforcement in reinforced Portland concrete is corrosive when the pH in the system is below a certain level. Portland cement with a high alkali level can together with reactive aggregates (sand/stone) cause alkali-silica reactions in the materials which lead to cracks and degrade the concrete. In addition, Portland cement has a faster development of heat of hydration than other types of cement, and therefore this cement is not suitable for use in certain environments. For example, in hot climates, the high heat of hydration can lead to cracks when Portland cement is used.
Flygeaske er et biprodukt oppnådd fra kullkraftverk. Flygeaske består mest av amorfe glasskomponenter som inkluderer alumina og silika. ASTM C 618-00 har klassifisert flygeaske i to klasser: klasse C og klasse F, avhengig av den totale mengden av kalsiumoksid, silika, alumina og jernoksid som forekommer. Klasse F inneholder mer enn 70 % av de nevnte oksidene, men har mindre enn 20 % brent kalk (CaO). Klasse C inneholder mindre enn 70 %, men mer enn 50 % av de nevnte oksidene. Klasse C flygeaske og inneholder vanligvis mer enn 20 % brent kalk (CaO). Klasse F flygeaske har pozzolan-egenskaper, som betyr at den kan reagere med kalsiumhydroksid i nærvær av vann for å lage kalsiumaluminat- og kalsiumsilikat hydrater. Klasse C flygeaske har hydrauliske egenskaper i tillegg til pozzolan-egenskaper. Fly ash is a by-product obtained from coal-fired power plants. Fly ash consists mostly of amorphous glass components that include alumina and silica. ASTM C 618-00 has classified fly ash into two classes: Class C and Class F, depending on the total amount of calcium oxide, silica, alumina and iron oxide present. Class F contains more than 70% of the mentioned oxides, but has less than 20% quicklime (CaO). Class C contains less than 70% but more than 50% of the mentioned oxides. Class C fly ash and usually contains more than 20% quicklime (CaO). Class F fly ash has pozzolanic properties, which means it can react with calcium hydroxide in the presence of water to create calcium aluminate and calcium silicate hydrates. Class C fly ash has hydraulic properties in addition to pozzolanic properties.
Erstatning av en del Portlandsement med flygeaske i sement- og betong-produksjoner bidrar til noen fordeler for miljø, teknologi og økonomi. Bruk av flygeaske reduserer forbruket av naturressursene for portlandsementproduksjon, som kalkstein og leire og forbruker industrielt biprodukt. Dette reduserer CO2-utslippet og drivstoffet brent ved sementproduksjonen. Dette bidrar da til vern av miljøet og senker også prisen på de sementbaserte bindemidler som brukes i betongproduksjonen. Betong med flygeaske bedrer støpeligheten, senker risikoen for termisk oppsprekking og ødeleggelser pga. alkali-silika reaksjoner. Men flygeaske har imidlertid én hovedulempe på grunn av dens trege pozzolanreaksjon i tidlig alder. Denne langsomme reaksjonen, særlig ved lav temperatur, resulterer i en lav tidlig trykkfasthet som forårsaker en forlengelse av driftstiden på byggeplassen, slik at bruken av betong forsinker prosjekter med denne typen bindemidler. Det er generelt akseptert at mengden portlandsement erstattet av flygeaske ikke bør være mer enn 20 % for å unngå denne betydelige reduksjonen i tidlig trykkfasthet. Det betyr at bruken av flygeaske er fortsatt begrenset i betong-industrien. Replacing some Portland cement with fly ash in cement and concrete production contributes to some advantages for the environment, technology and economy. The use of fly ash reduces the consumption of the natural resources for portland cement production, such as limestone and clay, and consumes industrial by-products. This reduces CO2 emissions and the fuel burned during cement production. This then contributes to the protection of the environment and also lowers the price of the cement-based binders used in concrete production. Concrete with fly ash improves castability, lowers the risk of thermal cracking and destruction due to alkali-silica reactions. However, fly ash has one main disadvantage due to its slow pozzolanic reaction at an early age. This slow reaction, especially at low temperature, results in a low early compressive strength which causes an extension of the operating time on the construction site, so that the use of concrete delays projects with this type of binder. It is generally accepted that the amount of portland cement replaced by fly ash should not be more than 20% to avoid this significant reduction in early compressive strength. This means that the use of fly ash is still limited in the concrete industry.
Trykkfastheten av hydrauliske bindemidler med portlandsement og flygeaske i tidlig alder, spesielt når et høyere nivå av portlandsementen er blitt erstattet, kan økes ved å bruke noen alkali-forbindelser slik som alkalimetall-hydroksider, alkali-sulfat salter og lignende, for å øke alkaliteten i systemet. Denne økningen av alkalitet bidrar til å aktivere pozzolan-reaksjonen av flygeasken grunnet en økt løselighet av flygeaske i miljøer med høy pH (pH>13). Imidlertid er den mengden faste alkalistoffer som kreves ganske høy for å oppnå en signifikant akselererende effekt og dette vil redusere sluttfastheten og holdbarheten av materiale som bruker denne type bindemiddel. The compressive strength of hydraulic binders with portland cement and fly ash at an early age, especially when a higher level of portland cement has been replaced, can be increased by using some alkali compounds such as alkali metal hydroxides, alkali sulfate salts and the like, to increase the alkalinity of the system. This increase in alkalinity helps to activate the pozzolanic reaction of the fly ash due to an increased solubility of fly ash in high pH environments (pH>13). However, the amount of solid alkali substances required to achieve a significant accelerating effect is quite high and this will reduce the final strength and durability of material using this type of binder.
Kjent teknikk fokuserer også på bruken av kjemikalier for å forkorte størknings-tiden slik at arbeidstiden på byggeplassen kan reduseres og former i bruk kan sirkuleres raskere. KR 20080111645 A beskriver en akselerator for å øke blandingsforholdet med flygeaske i betong som inneholder polykarboksylatsalt, trietanolamin, natriumtiocyanat, glyserol, nitrat og vann. KR 20060018594 A beskriver ikke-alkaliske akseleratorer i tilsetningsstoffer for betong. US 2004/0244655 A1 vedrører en akselerator brukt til størkning og herdning av hydrauliske bindemidler. Akseleratoren besto hovedsakelig av nitrater, aminoalkoholer, hydroksyl- karboksylsyrer og polyalkoholer. US 5605571 A beskriver en akselerator brukt til størkning og herdning av hydrauliske bindemidler som inneholder minst en nitrat- eller sulfittkomponent, minst en tiocyanatkomponent, minst en alkanolaminkomponent og minst en karboksylsyrekomponent. Known technology also focuses on the use of chemicals to shorten the solidification time so that working time on the construction site can be reduced and molds in use can be circulated more quickly. KR 20080111645 A describes an accelerator for increasing the mixing ratio with fly ash in concrete containing polycarboxylate salt, triethanolamine, sodium thiocyanate, glycerol, nitrate and water. KR 20060018594 A describes non-alkaline accelerators in additives for concrete. US 2004/0244655 A1 relates to an accelerator used for solidification and hardening of hydraulic binders. The accelerator mainly consisted of nitrates, amino alcohols, hydroxyl-carboxylic acids and polyalcohols. US 5605571 A describes an accelerator used for solidification and hardening of hydraulic binders containing at least one nitrate or sulphite component, at least one thiocyanate component, at least one alkanolamine component and at least one carboxylic acid component.
Det er etterspørsel etter en ny herdningsakselerator for hydrauliske bindemidler av portlandsement og flygeaske, hvor portlandsementen er erstattet med en høy andel flygeaske, i bruk ved lave og normale temperaturer. Den nye akseleratoren bør ikke inneholde klorider, og den bør ikke gi de ulempene i systemer med bindemidler forårsakes av en høy dosering av kjemikaler. There is a demand for a new hardening accelerator for hydraulic binders of portland cement and fly ash, where the portland cement has been replaced with a high proportion of fly ash, in use at low and normal temperatures. The new accelerator should not contain chlorides, and it should not cause the disadvantages in systems with binders caused by a high dosage of chemicals.
Oppsummering av oppfinnelsen Summary of the invention
Sammensetningen av akseleratorblandingen av foreliggende oppfinnelse omfatter: minst én uorganisk tiocyanat, minst ett organisk alkanolamin, minst ett organisk polyol, og eventuelt vann. The composition of the accelerator mixture of the present invention comprises: at least one inorganic thiocyanate, at least one organic alkanolamine, at least one organic polyol, and optionally water.
Akseleratoren ifølge oppfinnelsen inneholder ingen klorider. Den har heller ingen korrosiv effekt på stålarmeringen brukt i armert betong. The accelerator according to the invention contains no chlorides. It also has no corrosive effect on the steel reinforcement used in reinforced concrete.
Akseleratoren ifølge oppfinnelsen er egnet for å akselerere herdningen av hydrauliske bindemidler, spesielt for bindemidler som omfatter portlandsement og flygeaske, med høye andeler med flygeaske. Akseleratoren er egnet for produksjon av prefabrikkerte betonger eller for å akselerere herdingen av betongen som produseres på byggeplassen. The accelerator according to the invention is suitable for accelerating the hardening of hydraulic binders, especially for binders comprising portland cement and fly ash, with high proportions of fly ash. The accelerator is suitable for the production of precast concrete or to accelerate the hardening of the concrete produced on the construction site.
Komponentene i akseleratoren ifølge oppfinnelsen kan kombineres, og deretter tilsettes sammen til andre ingredienser (bindemidler, tilslag, fyllstoffer) for å lage betong, eller de kan være separat tilsatt. Akseleratoren kan tilsettes til blandevannet før dette tilsettes blandingen av bindemidler og andre ingredienser. The components in the accelerator according to the invention can be combined, and then added together to other ingredients (binders, aggregates, fillers) to make concrete, or they can be added separately. The accelerator can be added to the mixing water before it is added to the mixture of binders and other ingredients.
Detaljert beskrivelse av oppfinnelsen Detailed description of the invention
Akseleratoren ifølge oppfinnelsen omfatter minst ett uorganisk tiocyanat, minst ett organisk alkanolamin, minst ett organisk polyol og eventuelt vann. The accelerator according to the invention comprises at least one inorganic thiocyanate, at least one organic alkanolamine, at least one organic polyol and possibly water.
Et foretrukket tiocyanat er et alkalisk tiocyanat, jordalkalimetall tiocyanat eller blandinger derav. Et foretrukket eksempel er natriumtiocyanat. A preferred thiocyanate is an alkaline thiocyanate, alkaline earth metal thiocyanate or mixtures thereof. A preferred example is sodium thiocyanate.
Et foretrukket alkanolamin er mono-, di-, trietanolamin, triisopropanol-amin, eller blandinger derav. Dietanolamin er spesielt foretrukket. A preferred alkanolamine is mono-, di-, triethanolamine, triisopropanolamine, or mixtures thereof. Diethanolamine is particularly preferred.
En foretrukket polyol er en lavere alkohol med karbonkjede fra C2til C6, eller blandinger derav. 1,2,3-propantriol (glyserol) er spesielt foretrukket. Akseleratoren ifølge oppfinnelsen inneholder fra 5 til 50 vekt % av minst et uorganisk tiocyanat, 1-20 vekt % av minst et organisk alkanolamin, fra 1-20 vekt % av minst et polyol, og en eventuell rest utgjøres av vann. Fortrinnsvis omfatter akseleratoren ifølge oppfinnelsen 10-40 vekt % av minst ett uorganisk tiocyanat, 5-15 vekt % av minst ett organisk alkanolamin, fra 5-20 vekt % av minst ett polyol, og eventuell rest utgjøres av vann. A preferred polyol is a lower alcohol with a carbon chain from C2 to C6, or mixtures thereof. 1,2,3-propanetriol (glycerol) is particularly preferred. The accelerator according to the invention contains from 5 to 50% by weight of at least one inorganic thiocyanate, 1-20% by weight of at least one organic alkanolamine, from 1-20% by weight of at least one polyol, and any remainder consists of water. Preferably, the accelerator according to the invention comprises 10-40% by weight of at least one inorganic thiocyanate, 5-15% by weight of at least one organic alkanolamine, from 5-20% by weight of at least one polyol, and any remainder consists of water.
Akseleratoren ifølge oppfinnelsen er egnet for å akselerere herdningen av hydrauliske bindemidler, spesielt for bindemidler bestående av portlandsement og flygeaske med høy andel flygeaske (> 20 vekt %). Akseleratoren er egnet for produksjon av prefabrikkert betong eller for å akselerere herdningen av ferdigbetong på en byggeplass. The accelerator according to the invention is suitable for accelerating the hardening of hydraulic binders, especially for binders consisting of portland cement and fly ash with a high proportion of fly ash (> 20% by weight). The accelerator is suitable for the production of precast concrete or to accelerate the hardening of ready-mixed concrete on a construction site.
Mengden med flygeaske i hydrauliske bindemidler kan være over 20 vekt % relativt til den totale vekten av bindemidlene. The amount of fly ash in hydraulic binders can be over 20% by weight relative to the total weight of the binders.
Akseleratoren kan tilsettes til hydrauliske bindemidler, spesielt bindemidler bestående av portlandsement og flygeaske, i doser på fra 0,5 til 5 vekt % basert på den totale vekt av de hydrauliske bindemidler, fortrinnsvis i doser fra 1 til 3 vekt %. The accelerator can be added to hydraulic binders, especially binders consisting of portland cement and fly ash, in doses of from 0.5 to 5% by weight based on the total weight of the hydraulic binders, preferably in doses from 1 to 3% by weight.
Komponentene i akseleratoren ifølge oppfinnelsen kan kombineres i dispergert form i vann og deretter tilsettes til andre ingredienser (bindemidler, tilslag, fyllstoffer) for å lage betong, eller de kan tilsettes separat. The components of the accelerator according to the invention can be combined in dispersed form in water and then added to other ingredients (binders, aggregates, fillers) to make concrete, or they can be added separately.
Eksempler Examples
Følgende eksempler er gitt for å demonstrere effektene av akseleratoren ifølge oppfinnelsen ved lav temperatur (5 °C) og normal temperaturer (20 °C) Akseleratoren ifølge oppfinnelsen som ble testet i følgende testblandinger har en sammensetning som beskrevet i Tabell 1. The following examples are given to demonstrate the effects of the accelerator according to the invention at low temperature (5 °C) and normal temperatures (20 °C). The accelerator according to the invention which was tested in the following test mixtures has a composition as described in Table 1.
EKSEMPEL 1: EXAMPLE 1:
Effekten av akseleratoren på herdningen av mørtel ble testet. Trykkfastheten ble testet med prøver av mørtel 4x4x16 cm størrelse. Mørtelen var sammensatt som beskrevet i Tabell 2. The effect of the accelerator on the hardening of mortar was tested. The compressive strength was tested with samples of mortar 4x4x16 cm in size. The mortar was composed as described in Table 2.
EKSEMPEL 2: EXAMPLE 2:
Effekten av akseleratoren på herdningen av betong ble også testet. Betongprøvene med størrelse 10x10x10 cm ble laget for trykkfasthetsmålinger med sammensetninger som angitt i Tabell 5: The effect of the accelerator on the hardening of concrete was also tested. The concrete samples of size 10x10x10 cm were made for compressive strength measurements with compositions as indicated in Table 5:
Tabell 6 viser effekten av akseleratoren for herdningen av betong ved 5 °C etter 2 døgn og 28 døgn. Table 6 shows the effect of the accelerator for the hardening of concrete at 5 °C after 2 days and 28 days.
EKSEMPEL 3 EXAMPLE 3
Effekten av akseleratoren på herdningen av betong med CEM II/A-V (sement med 20 % flygeaske) ble også testet. Betongprøvene med størrelse 10x10x10 cm ble laget for trykkfasthetsmålinger med betongsammensetninger som angitt i Tabell 8: The effect of the accelerator on the hardening of concrete with CEM II/A-V (cement with 20% fly ash) was also tested. The concrete samples with a size of 10x10x10 cm were made for compressive strength measurements with concrete compositions as indicated in Table 8:
EKSEMPEL 4 EXAMPLE 4
Effekten av akseleratoren på herdningen av betong med CEM I (ikke tilsatt flygeaske) ble også testet. Betongprøvene med størrelse 10x10x10 cm ble laget for trykkfasthetsmålinger med sammensetninger som angitt i Tabell 11: The effect of the accelerator on the hardening of concrete with CEM I (no fly ash added) was also tested. The concrete samples with size 10x10x10 cm were made for compressive strength measurements with compositions as indicated in Table 11:
KONKLUSJON: CONCLUSION:
For å konkludere effekten til akseleratoren i blandingene A til H, er den relative økningen i trykkfasthet angitt i Tabell 14. To conclude the effect of the accelerator in mixtures A to H, the relative increase in compressive strength is given in Table 14.
Akseleratoren har sterkest effekt ved tidlig alder eller ved lav temperatur. The accelerator has the strongest effect at an early age or at a low temperature.
Claims (15)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20111524A NO20111524A1 (en) | 2011-11-04 | 2011-11-04 | Curing accelerator and a method for accelerating the curing of hydraulic binders and mixtures thereof |
| PCT/NO2012/050214 WO2013066192A1 (en) | 2011-11-04 | 2012-11-05 | Hardening-accelerator and a method for accelerating the hardening of hydraulic binders and mixtures thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20111524A NO20111524A1 (en) | 2011-11-04 | 2011-11-04 | Curing accelerator and a method for accelerating the curing of hydraulic binders and mixtures thereof |
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| Publication Number | Publication Date |
|---|---|
| NO20111524A1 true NO20111524A1 (en) | 2013-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20111524A NO20111524A1 (en) | 2011-11-04 | 2011-11-04 | Curing accelerator and a method for accelerating the curing of hydraulic binders and mixtures thereof |
Country Status (2)
| Country | Link |
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| NO (1) | NO20111524A1 (en) |
| WO (1) | WO2013066192A1 (en) |
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| JP6315242B2 (en) * | 2014-02-28 | 2018-04-25 | 清水建設株式会社 | Determination method and determination device for mixed material in cement |
| KR101713828B1 (en) * | 2014-11-04 | 2017-03-10 | (주)에스엠테크 | Cementless promotion-type admixture, and cementless composition comprising it |
| EP3109216B1 (en) | 2015-06-22 | 2020-09-16 | HeidelbergCement AG | Hardening and setting accelerator for hydraulic binding agents |
| EP3438073A1 (en) | 2017-07-31 | 2019-02-06 | Chryso | Additive for hydraulic binder useful to prevent the formation of rust-colored stains at the surface of hydraulic compositions |
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| DE59500484D1 (en) | 1994-03-03 | 1997-09-18 | Sika Ag | Chloride- and nitrite-free setting and hardening accelerator and method for accelerating the setting and hardening of hydraulic binders and mixtures containing them |
| EP1270529A1 (en) | 2001-06-22 | 2003-01-02 | Sika AG, vorm. Kaspar Winkler & Co. | Method of accelerating the setting and hardening of hydraulic binders and mixtures used therefor |
| KR100732536B1 (en) | 2004-08-25 | 2007-06-27 | 요업기술원 | Manufacturing method of non-alkaline quickener for concrete mixing |
| KR100888243B1 (en) | 2007-06-19 | 2009-03-10 | 주식회사 실크로드시앤티 | Accelerated admixture composition for increasing the miscibility of winter fly ash |
| CN101289293A (en) * | 2008-06-13 | 2008-10-22 | 北京工业大学 | Polycarboxylate antifreeze agent for cement concrete and preparation method thereof |
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2011
- 2011-11-04 NO NO20111524A patent/NO20111524A1/en not_active Application Discontinuation
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