DE2149601A1 - Liquefying additive for cement - is carbohydrate dehydration product obtained by acid treatment,for processability/strength - Google Patents

Liquefying additive for cement - is carbohydrate dehydration product obtained by acid treatment,for processability/strength

Info

Publication number
DE2149601A1
DE2149601A1 DE19712149601 DE2149601A DE2149601A1 DE 2149601 A1 DE2149601 A1 DE 2149601A1 DE 19712149601 DE19712149601 DE 19712149601 DE 2149601 A DE2149601 A DE 2149601A DE 2149601 A1 DE2149601 A1 DE 2149601A1
Authority
DE
Germany
Prior art keywords
strength
additives
carbohydrates
cement
processability
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.)
Pending
Application number
DE19712149601
Other languages
German (de)
Inventor
Lothar Dipl-Chem Dr Mueller
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.)
HeidelbergCement AG
Original Assignee
Portland Zementwerke Heidelberg AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Portland Zementwerke Heidelberg AG filed Critical Portland Zementwerke Heidelberg AG
Priority to DE19712149601 priority Critical patent/DE2149601A1/en
Publication of DE2149601A1 publication Critical patent/DE2149601A1/en
Pending 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/38—Polysaccharides or derivatives thereof
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/02—Alcohols; Phenols; Ethers
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/10—Carbohydrates or derivatives thereof
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D307/40—Radicals substituted by oxygen atoms
    • C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom

Abstract

Liquefying additives for concrete and mortar consist of dehydration prods. of carbohydrates. These additives improve the processability of the fresh material and/or increase the strength after setting. Even large amts. do not cause the introduction of large quantities of air and they also effective in the low consistency region. The additives are obtd. by boiling carbohydrates (mono-, oligo-, or poly-saccharides) with acids and contain 5-hydroxymethyl-furfurol, partly condensed to resinous, acid-insol. prods., which can be brought into soln. by OH ions. They are added in the form of aq. solns.

Description

Zusatzmittel zum Verflüssigen von Beton und Mörtel, Verfahren zu deren Herstellung, sowie deren Anwendung Vorliebende Erfindung bezieht sich auf neue Zusatzmittel für Det3n und Mörtel. Die Zusatzmittel haben dabei die Aufgabe und Funktion, die Verarbeitbarkeit des frischen Betons oder Mörtels zu verbessern und/oder die Festigkeit der erhärteten Produkte zu erhöhen. Additive for liquefying concrete and mortar, method too their manufacture, as well as their application. The present invention relates to new additives for Det3n and mortar. The additives have the task and function to improve the workability of the fresh concrete or mortar and / or to increase the strength of the hardened products.

Es ist bekannt, daß durch bestimmte Zusätze, z.B. Ligninsulfonate, die Verarbeitbarkeit von Beton und Mörtel, bei gleichem asser/Zement-Verhältnis verbessert werden kann bzw. der Wasser/ Zoment-Wert bei gleicher Verarbeitbarkeit gesenkt und so die Festigkeit erhöht werden kann.It is known that certain additives, e.g. lignosulfonates, the workability of concrete and mortar with the same water / cement ratio can be improved or the water / Zoment value with the same processability lowered and so the strength can be increased.

Dio Ligninsulfonute haben jodoch den Nachteil, daß sie bei hö-Moror Dosierung erhebliche Mengen Luftporen einführen und somit Festigkeitseinbußen vorursachen.Dio Ligninsulfonute have the disadvantage that they are used in Hö-Moror Dosing introduce considerable amounts of air pores and thus cause a loss of strength.

Außerdem können bosondors trockono Betone mit Ligninsulfonaton nicht mehr hinreichend verflüssigt worden.In addition, bosondors Trockono concretes with lignin sulfonate cannot be used has been sufficiently liquefied.

.)ic mit dieser Drfindung geschaffenen Zusätze führen auc bei größerer Dosierung keine bemerkenswerten Anteile Luft ein und sind auch im niedrigen Konsistonzbereich des Betons wirksam..) ic additions created with this invention also lead to larger Dosage does not involve any noticeable proportions of air and is also in the low consistency range of concrete effective.

Die Erfindung besteht darin, daß als Zusatzmittel Produkto voreschlagen werden, die durch Dchydratisierung von Kohlehydraraten entstanden sind. Die Dehydratisierung erfolgt dabei vorzugsweise durch Buchen der wässrigen Lösungen der Kohlohydrate mit Säuren.The invention consists in proposing product as an additive resulting from the dchydration of carbohydrates. The dehydration preferably takes place by booking the aqueous solutions of the carbohydrates with acids.

i)as dabei entstehende 5-IIydroxymetllylfurfurol kondensiert zu säurounlöslichen harzartigen Produkten, die durch OII-Ionen wieder in Lösung gebracht werden können.i) the resulting 5-IIydroxymetllylfurfurol condenses to acid-insoluble Resin-like products that can be brought back into solution by OII ions.

Die Zusätze werden erfindungsgemäß zum Mörtel oder Beton vorzugsweise in Mengen zugegeben, die, bezogen auf das Gewicht des trockenen Bindemittels, zwischen etwa o,l und 4,o Gew.-% liegen. Die Zusätze können im Anmachwasser aufgelöst oder in den laufenden Mischer gegeben werden. Wenn die Zugabe erst erfolgt, nachdem Zement, Wasser und Zuschläge vermischt werden, ist die Wirkung am stärksten.According to the invention, the additives are preferably used for mortar or concrete added in amounts based on the weight of the dry binder between about 0.1 and 4.0 wt.%. The additives can be dissolved in the mixing water or can be added to the running mixer. If the addition is made after cement, When water and aggregates are mixed, the effect is greatest.

Da die erfindungsgemäßen Zusätze auch verzögernd wirken, führen sie bereits ohne Wassereinsparung zu einer Festigkeitssteigerung nach 28 Tagen. Die Bindemittel, bei denen die Erfindung angewendet werden kann, umfassen Fortlandzement und Zementzusammensetzungen, die Portlandzementklinker enthalten.Since the additives according to the invention also have a retarding effect, they lead Already without saving water to an increase in strength after 28 days. the Binders to which the invention can be applied include fortland cement and cement compositions containing portland cement clinker.

Die folgenden Beispiele dienen aur weiteren Erläuterung des Erfindungsgogenstandes.The following examples serve to further illustrate the scope of the invention.

Beispiel 1 50 g Dextrin wurden in l00 ml 5%-iger Schwefelsäure gelöst und 1 h auf 90-100°C erwärmt. Anschließend wurden l70 ml Wasser und 5 G Na 011 (fest) hinzugegeben und solange gerührt, bis der braune Niederschlag gelöst war.Example 1 50 g of dextrin were dissolved in 100 ml of 5% sulfuric acid and heated to 90-100 ° C for 1 h. Then 170 ml of water and 5 G Na 011 (solid) added and stirred until the brown precipitate was dissolved.

Beispiel 2 30 g Rohrzucker wurden in loo ml 5%-iger Schwefelsäure gelöst und 1 h auf 9o - 100° C erwärmt. Danach wurden loo ml Wasser und 5 G Na OII (fest) hinzugefügt und der Niederschlag aufgelöst.Example 2 30 g of cane sugar were dissolved in 100 ml of 5% strength sulfuric acid dissolved and heated to 90-100 ° C. for 1 hour. Then 100 ml of water and 5 g of Na OII (solid) added and the precipitate dissolved.

Beispiel 3 30 g D-Glucose wurden in 100 ml 5%-iger Schwefelsäure gelöst und 1 h auf 90-100° C erwärmt. Dauach wurden 100 ml Wasser und 5 g Na OII (fost) hinzugegeben und bis zur Auflösung des Niederschlages gerührt.Example 3 30 g of D-glucose were dissolved in 100 ml of 5% sulfuric acid and heated to 90-100 ° C for 1 h. Then 100 ml of water and 5 g of Na OII (fost) added and stirred until the precipitate dissolves.

Im folgenden wird der technische Fortschritt crläutert : Die Wirksamkoit der in den Beispieleu herstellungsmäßig beschri beuen Präparate wurde an Beton mit einem W/Z Wert von 0,6 geprüft, der pro m3 300 kg eines handelsüblichen PZ 350 F enthielt. Als Zuschlag wurde Rheinkies- und Sandmaterial verwendet,bestehond aus 4 Körnungen o-30 mm nach Siebline D/b DIN 1045. Die Frischbetonrohdichte betrung 2,38 kg/dm³.The technical progress is explained below: The effectiveness the preparations described in the examples were used on concrete A W / C value of 0.6 tested, the 300 kg per m3 of a commercially available PZ 350 F contained. Rhine gravel and sand material was used as a surcharge, consisting of 4 grain sizes o-30 mm according to Siebline D / b DIN 1045. The fresh concrete density is affected 2.38 kg / dm³.

Das Zusatzmittel wurde 1 Min. nach Beginn des Mischvorgangs in den Mischer gegeben, worauf noch 1 Min. weitergerührt wurde. Die Zusatzmittelmenge war jeweils 1%, bezogen auf das Zementgewicht.The additive was added 1 min. After the start of the mixing process Given mixer, whereupon stirring was continued for 1 min. The amount of additive was 1% each, based on the cement weight.

Am Frischbeton wurden das Ausbreitmaß und der Luftporengehalt nach DIN 1045 bestimmt. Am erhä-rteten Beton wurde die Druckfestigkeit nach DIN 1048 an Würfeln von 20 cm Kantenlänge bestimmt In der folgenden Tabelle sind die Ergebnisse angeführt, die mit den oben näher erläuterten Zusatzmitteln erhalten wurden. Beispiel Nr. Frischbeton Erhärteter Beton kein Zusatz Ausbereitmaß Luftporengehalt Druckestigkeit nach 28 Tagen (Null-Versuch) 34 cm 2,0% 362 kp/cm² 1 4t3 11 1,7 % 376 " 2 47 " 1,4 , 364 " 3 51" 1,6% 380 " 1 34 cm 1,8% 420 kp/cm² Variante Im letzten Beispiel (Variante) wurden 9,5% Wass eingespart und so das Ausbreitmaß des Null-Versuchs eingestellt.The slump and the air void content were determined in accordance with DIN 1045 on the fresh concrete. On the hardened concrete, the compressive strength according to DIN 1048 was determined on cubes with an edge length of 20 cm. The table below lists the results that were obtained with the additives explained in more detail above. Example no. Fresh concrete Hardened concrete No additional dimensions, air void content, compressive strength after 28 days (Zero trial) 34 cm 2.0% 362 kgf / cm² 1 4t3 11 1.7% 376 " 2 47 "1,4, 364" 3 51 "1.6% 380" 1 34 cm 1.8% 420 kgf / cm² variant In the last example (variant), 9.5% water was saved and the slump of the zero test was set in this way.

PatentansprücheClaims

Claims (7)

Patentansprüche 1. Zusatzmittel zum Verflüssigen von Beton und Mörtel, dadurch gekennzeichnet, daß sie was Dehydratisierungsprodukten von Kohlehydraten bestehen. Claims 1. Additive for liquefying concrete and mortar, characterized in that they are carbohydrate dehydration products exist. 2. Zusatzmittel nach Anspruch 1, dadurch gekennzeichnet, daß die Dehydratisierungsprodukte durch Kochen der wässrigen Lösungen der Kohlehydrate mit Säuren erhalten sind.2. Additive according to claim 1, characterized in that the dehydration products obtained by boiling the aqueous solutions of the carbohydrates with acids. 3. Zusatzmittel nach Anspruch 2, dadurch gekennzeichnet, daß aus den Kohlehydraten 5-Hydroxymethylfurfurol gebildet ist.3. Additive according to claim 2, characterized in that from the Carbohydrates 5-hydroxymethylfurfurol is formed. 4. Zusatzmittel nach Anspruch 3, dadurch gekennzeichnet, daß das 5-Hydroxymethylfurfurol teilweise zu harzartigen, säureunlöslichen Produkten kondensiert ist.4. Additive according to claim 3, characterized in that the 5-hydroxymethylfurfurol partially condensed to resinous, acid-insoluble products. 5. Zusatzmittel nach Anspruch 4, dadurch gekennzeichnet, daß die säureunlöslichen Kondensationsprodukte durch OII-Ionen in Lösung gebratt sind.5. Additive according to claim 4, characterized in that the acid-insoluble Condensation products are fried in solution by OII ions. 6. Verfahren zur Herstellung der Zusatzmittel nach Anspruch 1-5, dadurch gekennzeichnet, daß als Kohlehydrate Mono-, Oligo-oder Polysaccharide eingesetzt werden.6. A method for producing the additives according to claims 1-5, characterized characterized in that mono-, oligo- or polysaccharides are used as carbohydrates will. 7. Verwendung der Zusatzmittel nach Ansprüchen 1 - 4 dadurch gekennzeichnet, daß sie in Form wässriger Lösungen eingesetzt werden.7. Use of the additives according to claims 1-4, characterized in that that they are used in the form of aqueous solutions.
DE19712149601 1971-10-05 1971-10-05 Liquefying additive for cement - is carbohydrate dehydration product obtained by acid treatment,for processability/strength Pending DE2149601A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712149601 DE2149601A1 (en) 1971-10-05 1971-10-05 Liquefying additive for cement - is carbohydrate dehydration product obtained by acid treatment,for processability/strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712149601 DE2149601A1 (en) 1971-10-05 1971-10-05 Liquefying additive for cement - is carbohydrate dehydration product obtained by acid treatment,for processability/strength

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Publication Number Publication Date
DE2149601A1 true DE2149601A1 (en) 1973-04-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043285A1 (en) * 1999-04-08 2000-10-11 Roquette Frˬres Additive for mineral binder based on the product of internal dehydration of a hydrogenated sugar, mineral binders containing said additive and method for preparing them

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043285A1 (en) * 1999-04-08 2000-10-11 Roquette Frˬres Additive for mineral binder based on the product of internal dehydration of a hydrogenated sugar, mineral binders containing said additive and method for preparing them
FR2791973A1 (en) * 1999-04-08 2000-10-13 Roquette Freres ADJUVANTS FOR MINERAL BINDERS, BASED ON A PRODUCT OF INTERNAL DEHYDRATION OF A HYDROGENATED SUGAR, ADJUVANT MINERAL BINDERS AND PROCESS FOR THE PREPARATION THEREOF

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