CH530346A - Water-resistant building material based on anhydrite - Google Patents
Water-resistant building material based on anhydriteInfo
- Publication number
- CH530346A CH530346A CH749868A CH749868A CH530346A CH 530346 A CH530346 A CH 530346A CH 749868 A CH749868 A CH 749868A CH 749868 A CH749868 A CH 749868A CH 530346 A CH530346 A CH 530346A
- Authority
- CH
- Switzerland
- Prior art keywords
- building material
- anhydrite
- weight
- resin
- water
- Prior art date
Links
- 229910052925 anhydrite Inorganic materials 0.000 title claims abstract description 30
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title claims abstract description 30
- 239000004566 building material Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 20
- 239000011230 binding agent Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 19
- KCZIUKYAJJEIQG-UHFFFAOYSA-N 1,3,5-triazin-2-amine Chemical compound NC1=NC=NC=N1 KCZIUKYAJJEIQG-UHFFFAOYSA-N 0.000 claims abstract description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 150000004679 hydroxides Chemical class 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 229920003180 amino resin Polymers 0.000 claims description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 abstract description 4
- 229920000877 Melamine resin Polymers 0.000 abstract description 3
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 abstract description 2
- NJYZCEFQAIUHSD-UHFFFAOYSA-N acetoguanamine Chemical compound CC1=NC(N)=NC(N)=N1 NJYZCEFQAIUHSD-UHFFFAOYSA-N 0.000 abstract description 2
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 abstract description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 abstract 2
- 239000005864 Sulphur Substances 0.000 abstract 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 1
- -1 sulphur compound Chemical class 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- NYYSPVRERVXMLJ-UHFFFAOYSA-N 4,4-difluorocyclohexan-1-one Chemical compound FC1(F)CCC(=O)CC1 NYYSPVRERVXMLJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical compound OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
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
- C04B24/16—Sulfur-containing compounds
- C04B24/20—Sulfonated aromatic compounds
- C04B24/22—Condensation or polymerisation products 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
-
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/16—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 calcium sulfate cements containing anhydrite, e.g. Keene's cement
-
- 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
- C04B2111/60—Flooring materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
A water-resistant building material based on anhydrite contains a sulphite- or pulphonic acid-modified resin on a basis of an amino-s-triazine with at least two NH2 groups, and metal (hydr)oxides. The guilding material has good flexing strength when stores in either air or water. Oxides of alkaline earth metals or aluminium are particularly suitable, especially CaO; the amount is 0.5-10 weight %, preferably 0.5-5 weight %, on the anhydrite binder. Suitable resins include (i) resins prepared from melamine or a derivative thereof, formaldehyde and a sulphur compound, such as dithionite, sulphite, bisulphite, pyrosulphite or rongalite, and (ii) resins prepared from acetoguanamine sulphonic acid and benzoguanamine sulphonic acid.
Description
Wasserfester Baustoff auf der Basis von Anhydritbinder und Verfahren zu seiner Herstellung
Anhydritbinder werden mit Zuschlagstoffen (Sand) zur Herstellung von Mörtel, beispielsweise für Fussbodenestriche, verwendet. Die Anwendungsmöglichkeiten des Anhydrit binders waren bisher dadurch begrenzt, dass der verfestigte
Mörtel eine sehr viel geringere Wasserfestigkeit besass als die aus Zement hergestellten Baustoffe. Es sind zwar schon Vorschläge gemacht worden, um die Wasserfestigkeit des Anhydritbinders durch Zusätze, auch solcher auf organischer Basis wie zum Beispiel Zinkstearat, zu verbessern. Die aus den bekannten Anhydritbindern hergestellten Prüfkörper zeigten jedoch bei Unterwasserlagerung Biegefestigkeitswerte, welche unter 40 kg/cm2 und damit unter der Mindestfestigkeit für einen wasserfesten Baustoff lagen.
Anhydritbinder konnten deshalb bisher noch nicht für Zwecke verwendet werden, wo bislang Zement eingesetzt wurde.
Wegen des geringen Schwundmasses beim Aushärten des aus einem Anhydritbinder hergestellten Mörtels wäre aber ein wirklich wasserfester Anhydritbinder sehr erwünscht.
Hiernach bezieht sich die Erfindung auf einen wasserfesten Baustoff auf der Basis von Anhydritbinder und Kunstharz. Für einen solchen Baustoff schlägt die Erfindung vor, dass der Baustoff als Kunstharz ein sulfit- oder sulfonsäuremodifiziertes Aminoplastharz auf der Basis eines Aminos-triazins mit mindestens zwei NH2-Gruppen und Metalloxide oder -hydroxide enthält. Vorzugsweise werden als Metalloxide oder -hydroxide solche der Erdalkalien verwendet.
Es wurde festgestellt, dass aus dem erfindungsgemässen Baustoff hergestellte Prüfkörper bei Unterwasserlagerung nach 28 Tagen und auch noch nach 90 Tagen eine Biegezugfestigkeit von weit über 40 kg/cm2 besitzen. Der erfindungsgemässe Baustoff erfüllt damit die Anforderungen, die an die Wasserfestigkeit eines Anhydritbinders gestellt werden. Die Verbesserung der Wasserfestigkeit des Anhydritbinders dürfte darauf zurückzuführen sein, dass in dem Baustoff nach dem Aushärten eine chemische Bindung zwischen anorganischen und organischen Bestandteilen vorliegt.
Neben den bereits erwähnten Oxiden zeigt auch Chromoxid eine sehr deutliche Verbesserung der Wasserfestigkeit des Anhydritbinder-Baustoffs. Die besten Ergebnisse werden jedoch mit CaO erhalten.
Das erfindungsgemäss dem Anhydritbinder-Baustoff zugesetzte Harz und die Erdalkalioxide werden jeweils in einer Menge von 0,5-10 Gew. %, vorzugsweise zwischen 0,5 und 5 Gew. %, bezogen auf Anhydritbinder, verwendet. Es hat sich als zweckmässig erwiesen, das Verhältnis von Harz zu Erdalkalioxid so zu wählen, dass pro Mol Säuregruppe mindestens ein Mol Erdalkali zur Verfügung steht.
Die Erfindung findet vorzugsweise bei aus synthetischem Anhydrit hergestellten Baustoffen Anwendung. Der synthetische Anhydrit enthält erfahrungsgemäss etwa 1% Kalziumoxid, das dem bei der Flusssäureherstellung anfallenden Anhydrit zur Neutralisation in geringem Überschuss zugesetzt wird.
Das Harz wird zweckmässigerweise dem Anmachwasser zugesetzt, das die Anregersubstanzen für den Anhydritbinder enthält. Hierbei ist es von Vorteil, wenn eine Lösung eines hydrophilen, sulfit- oder sulfonsäuremodifizierten Amino-striazin-Harzes mit dem Anmachwasser vermischt wird.
Für die Zwecke der Erfindung haben sich beispielsweise solche Harze als geeignet erwiesen, die durch Umsetzung von Melamin und dessen Derivaten, zum Beispiel Hexamethylolmelamin, mit Formaldehyd und einer schwefelhaltigen Verbindung wie zum Beispiel Dithionit, Sulfit, Bisulfit, Pyrosulfit und Rongalit erhalten werden. Die Dauer der für die Umsetzung notwendigen Erhitzung kann nach deutschem Bundespatent Nr. 952495 durch Zusatz von Formamidinsulfinsäure vermindert werden. Weitere Ausgangssubstanzen für die Herstellung der erfindungsgemäss verwendeten Harze sind beispielsweise Acetoguanaminsulfonsäure und Benzoguanaminsulfonsäure.
Für das nachfolgende Ausführungsbeispiel der Herstellung eines Baustoffes nach der Erfindung wurde zunächst eine Harzlösung hergestellt. Hierbei wurde wie folgt vorgegangen:
567 Gew.-Teile 37%ges Formalin werden mit Natronlauge auf pH 4,5 gebracht und anschliessend 294 Gew.-Teile Melamin zugesetzt. Danach wird auf 75" C erwärmt, bis sich eine klare Lösung bildet. Die Lösung kühlt man auf 45" C ab und setzt 222 Gew.-Teile Na2S205 zu. Anschliessend werden 332 Vol.-Teile Wasser zugegeben, mit Natronlauge wird ein pH-Wert von 10,5 eingestellt und die Lösung 2 Std.
auf 80" C erwärmt. Nach Abkühlung auf 50" C versetzt man die Lösung mit einem Gemisch aus 2116 Vol.-Teilen Wasser und 70 Gew.-Teilen konzentrierter Schwefelsäure. Hierauf wird das Reaktionsgemisch 5 Std. bei 50" C erwärmt und dann mit Natronlauge auf pH 8,7 eingestellt.
Man erhält eine in jedem Verhältnis mit Wasser mischbare Lösung mit einer Viskosität von 37 cP bei 25" C und mit einem Feststoffgehalt von etwa 20%.
Für die Herstellung eines wasserfesten Anhydritbinder Baustoffs wurden dem für eine Mischung aus 100 Gew.-Teilen Anhydrit und 300 Gew.-Teilen Normensand bestimmten Anmachwasser, das 1 Gew.-Teil K2SO4 und 1 Gew.-Teil CaO enthielt, 5 Gewichtsteile der vorerwähnten Harzlösung zugesetzt. Der CaO-Gehalt des (synthetischen) Anhydrits lag bei 0,95 %. Nach der Zugabe des Anmachwassers zu dem Gemisch aus Anhydrit und Sand wurden aus dem Gemenge Prüfkörper nach DIN 4208 und 1164 hergestellt und anschliessend, d. h. nach 48 Stunden, zwecks Aushärtung in Luft und unter Wasser gelagert.
In der nachfolgenden Tabelle ist die nach einer bestimmten Lagerzeit an den Prüfkörpern gemessene Biegezugfestigkeit den Werten gegenübergestellt, die an Prüfkörpern ermittelt wurden, die in derselben Weise hergestellt und gelagert wurden (O-Versuch) mit der einzigen Ausnahme, dass das Gemisch, aus dem die Prüfkörper hergestellt wurden, nicht das erfindungsgemäss verwendete Harz enthielt.
Lagerzeit O-Versuch Erfindung i. Tagen Biegezugfestigkt. i. kg/cm2 Biegezugfestigkt. i. kg/cmS
Luftlagerg. Wasserlagerg. Luftlagerg. Wasserlagerg.
2 11,0 11,0 32,5 32,5
3 29,0 22,5 45,0 35,0
7 59,0 24,5 77,5 37,5
14 55,5 28,2 93,5 40,5
28 65,5 31,0 99,5 45,5
56 102,0 49,0
90 105,5 53,5
Aus der vorstehenden Tabelle geht hervor, dass die aus dem erfindungsgemässen Material hergestellten Prüfkörper sowohl bei Luftlagerung als auch bei Wasserlagerung eine Biegezugfestigkeit aufweisen, die deutlich über den Werten der Prüfkörper des O-Versuchs liegen.
Selbstverständlich können dem Anhydrit-Baustoff auch Oxidgemische zugesetzt werden, wie sie beispielsweise im Zement vorliegen.
Waterproof building material based on anhydrite binder and process for its production
Anhydrite binders are used with aggregates (sand) to produce mortar, for example for floor screeds. The possible uses of the anhydrite binder were previously limited by the fact that it solidified
Mortar had a much lower water resistance than the building materials made from cement. Proposals have already been made to improve the water resistance of the anhydrite binder through additives, including those on an organic basis such as zinc stearate. However, the test specimens produced from the known anhydrite binders showed flexural strength values when stored underwater which were below 40 kg / cm2 and thus below the minimum strength for a waterproof building material.
Anhydrite binders could therefore not yet be used for purposes where cement was previously used.
Because of the low degree of shrinkage during the hardening of the mortar made from an anhydrite binder, a truly waterproof anhydrite binder would be very desirable.
The invention then relates to a water-resistant building material based on anhydrite binder and synthetic resin. For such a building material, the invention proposes that the building material contain as synthetic resin a sulfite- or sulfonic acid-modified aminoplast resin based on an aminostriazine with at least two NH2 groups and metal oxides or hydroxides. The metal oxides or hydroxides used are preferably those of the alkaline earths.
It was found that test specimens produced from the building material according to the invention have a flexural tensile strength of well over 40 kg / cm 2 when stored underwater after 28 days and even after 90 days. The building material according to the invention thus fulfills the requirements placed on the water resistance of an anhydrite binder. The improvement in the water resistance of the anhydrite binder can be attributed to the fact that there is a chemical bond between inorganic and organic components in the building material after it has hardened.
In addition to the oxides already mentioned, chromium oxide also shows a very significant improvement in the water resistance of the anhydrite binder building material. However, the best results are obtained with CaO.
The resin added to the anhydrite binder building material according to the invention and the alkaline earth oxides are each used in an amount of 0.5-10% by weight, preferably between 0.5 and 5% by weight, based on the anhydrite binder. It has proven to be useful to choose the ratio of resin to alkaline earth oxide so that at least one mole of alkaline earth is available per mole of acid group.
The invention is preferably used in building materials made from synthetic anhydrite. Experience has shown that the synthetic anhydrite contains about 1% calcium oxide, which is added in a slight excess to the anhydrite produced during hydrofluoric acid production for neutralization.
The resin is expediently added to the mixing water, which contains the exciter substances for the anhydrite binder. It is advantageous here if a solution of a hydrophilic, sulfite- or sulfonic acid-modified amino-striazine resin is mixed with the mixing water.
For the purposes of the invention, for example, those resins have proven to be suitable which are obtained by reacting melamine and its derivatives, for example hexamethylolmelamine, with formaldehyde and a sulfur-containing compound such as for example dithionite, sulfite, bisulfite, pyrosulfite and rongalite. According to German Federal Patent No. 952495, the duration of the heating necessary for the reaction can be reduced by adding formamidinesulfinic acid. Further starting substances for the production of the resins used according to the invention are, for example, acetoguanamine sulfonic acid and benzoguanamine sulfonic acid.
For the following exemplary embodiment of the production of a building material according to the invention, a resin solution was first produced. The procedure was as follows:
567 parts by weight of 37% total formalin are brought to pH 4.5 with sodium hydroxide solution, and 294 parts by weight of melamine are then added. It is then heated to 75 ° C. until a clear solution is formed. The solution is cooled to 45 ° C. and 222 parts by weight of Na2S205 are added. Then 332 parts by volume of water are added, a pH of 10.5 is set with sodium hydroxide solution and the solution is kept for 2 hours.
heated to 80 "C. After cooling to 50" C., the solution is treated with a mixture of 2116 parts by volume of water and 70 parts by weight of concentrated sulfuric acid. The reaction mixture is then heated for 5 hours at 50 ° C. and then adjusted to pH 8.7 with sodium hydroxide solution.
A solution is obtained which is miscible with water in any ratio and has a viscosity of 37 cP at 25 ° C. and a solids content of about 20%.
For the production of a waterproof anhydrite binder building material, 5 parts by weight of the aforementioned resin solution were added to the mixing water intended for a mixture of 100 parts by weight of anhydrite and 300 parts by weight of standard sand, which contained 1 part by weight of K2SO4 and 1 part by weight of CaO added. The CaO content of the (synthetic) anhydrite was 0.95%. After adding the mixing water to the mixture of anhydrite and sand, test specimens according to DIN 4208 and 1164 were produced from the mixture and then, i. H. after 48 hours, stored in air and under water for curing.
In the following table, the flexural tensile strength measured on the test specimens after a certain storage time is compared with the values determined on test specimens that were produced and stored in the same way (O-test) with the only exception that the mixture from which the Test specimens were produced which did not contain the resin used according to the invention.
Storage time O experiment Invention i. Days of flexural strength. i. kg / cm2 flexural strength. i. kg / cmS
Air bearing Water storage Air bearing Water storage
2 11.0 11.0 32.5 32.5
3 29.0 22.5 45.0 35.0
7 59.0 24.5 77.5 37.5
14 55.5 28.2 93.5 40.5
28 65.5 31.0 99.5 45.5
56 102.0 49.0
90 105.5 53.5
The table above shows that the test specimens produced from the material according to the invention have a flexural tensile strength both in air storage and in water storage which are clearly above the values of the test specimens in the O test.
Of course, oxide mixtures such as those found in cement, for example, can also be added to the anhydrite building material.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB0092995 | 1967-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH530346A true CH530346A (en) | 1972-11-15 |
Family
ID=6986706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH749868A CH530346A (en) | 1967-06-14 | 1968-05-15 | Water-resistant building material based on anhydrite |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT280873B (en) |
| BE (1) | BE716426A (en) |
| CH (1) | CH530346A (en) |
| DE (1) | DE1646412C3 (en) |
| DK (1) | DK134856B (en) |
| FR (1) | FR1570149A (en) |
| GB (1) | GB1164772A (en) |
| NL (1) | NL6807907A (en) |
| NO (1) | NO121648B (en) |
| SE (1) | SE340587B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1966658C3 (en) * | 1969-08-28 | 1982-03-11 | Höllfritsch, Erich, Dipl.-Volksw., 8501 Behringersdorf | Compound for screeds and methods of processing the compound |
| AT395417B (en) * | 1987-12-18 | 1992-12-28 | Terranova Ind Gmbh | ADDITIVE TO BUILDING MATERIAL MIXTURES CONTAINING ANHYDRITE |
-
1967
- 1967-06-14 DE DE19671646412 patent/DE1646412C3/en not_active Expired
-
1968
- 1968-05-15 CH CH749868A patent/CH530346A/en not_active IP Right Cessation
- 1968-05-15 AT AT465568A patent/AT280873B/en not_active IP Right Cessation
- 1968-05-18 NO NO194868A patent/NO121648B/no unknown
- 1968-06-04 SE SE741368A patent/SE340587B/xx unknown
- 1968-06-06 NL NL6807907A patent/NL6807907A/xx unknown
- 1968-06-11 FR FR1570149D patent/FR1570149A/fr not_active Expired
- 1968-06-12 DK DK274968A patent/DK134856B/en not_active IP Right Cessation
- 1968-06-12 BE BE716426D patent/BE716426A/xx not_active IP Right Cessation
- 1968-06-14 GB GB2845768A patent/GB1164772A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1646412C3 (en) | 1973-09-13 |
| GB1164772A (en) | 1969-09-24 |
| FR1570149A (en) | 1969-06-06 |
| DK134856C (en) | 1977-06-20 |
| DE1646412A1 (en) | 1970-08-06 |
| NO121648B (en) | 1971-03-22 |
| DK134856B (en) | 1977-01-31 |
| AT280873B (en) | 1970-04-27 |
| SE340587B (en) | 1971-11-22 |
| BE716426A (en) | 1968-11-04 |
| NL6807907A (en) | 1968-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1671017C3 (en) | Inorganic-organic building material | |
| DE2007603B2 (en) | Additive for hydraulic cement mixes and process for the preparation of an easily dispersible hydraulic cement mix | |
| EP0006135B1 (en) | Additive for inorganic binders, building material and process for its preparation | |
| DE2421222A1 (en) | USE OF THE CONDENSATION PRODUCTS OF DOUBLE NUCLEAR PHENOLS WITH FORMALDEHYDE AS A CONSTRUCTION MATERIAL | |
| CH530346A (en) | Water-resistant building material based on anhydrite | |
| EP0077904B1 (en) | Building material containing a polycondensation product | |
| DE2019781A1 (en) | Building compsn contng hydrated inorganicbin - | |
| DE2356637A1 (en) | High early strength binder - contg. cements, gypsum and formaldehyde-amino-1,3,5-triazine condensate contg. sulphonic acid gps. | |
| AT364640B (en) | BUILDING MATERIAL AND A METHOD FOR THE PRODUCTION THEREOF | |
| DE1646412B (en) | Waterproof building material based on anhydrite binder and process for its production | |
| EP0052212B1 (en) | Method of preparing aminoplast resins | |
| AT358976B (en) | ADDITIVES FOR INORGANIC BINDERS | |
| EP0221301B1 (en) | Storage-stable concentrated aqueous solutions of melamine formaldehyde condensates, process for their preparation and their use | |
| DE1671058B2 (en) | Method of making a building material | |
| DE1941576A1 (en) | Mortar contg modified triazine deriv resin | |
| DE2916705A1 (en) | Thermosetting plasticiser for use in concrete prodn. etc. - consists of sulphite-modified melamine resin and lignosulphonate-urea!-formaldehyde! resin co-condensate | |
| DE2424379B2 (en) | Condensation resins and their uses | |
| DE2353474C3 (en) | Process for the production of thermoset molded parts from cement | |
| DE1159839B (en) | Process for the production of construction elements from inorganic binders which bind with water | |
| DE1301580B (en) | Process for the production of a plastic, sulfur-containing synthetic resin compound | |
| CH543459A (en) | Epoxy-modified cement mortar | |
| CH686440A5 (en) | Modified melamine resins. | |
| DE2017882A1 (en) | Building compsn contng cyanuric acid dia-mi - - | |
| DE1211097B (en) | Sulphate-resistant, quick-setting spray mortar and process for its production | |
| DE1113405B (en) | Process for preventing the appearance of drifts in cements that have not been deposited |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |