DE882975C - Process for the production of crack-free porous building blocks from brown coal filter ash - Google Patents

Process for the production of crack-free porous building blocks from brown coal filter ash

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Publication number
DE882975C
DE882975C DEV3331A DEV0003331A DE882975C DE 882975 C DE882975 C DE 882975C DE V3331 A DEV3331 A DE V3331A DE V0003331 A DEV0003331 A DE V0003331A DE 882975 C DE882975 C DE 882975C
Authority
DE
Germany
Prior art keywords
crack
building blocks
brown coal
production
porous building
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.)
Expired
Application number
DEV3331A
Other languages
German (de)
Inventor
Reinhard Ernst Dr Phil N Vogel
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEV3331A priority Critical patent/DE882975C/en
Application granted granted Critical
Publication of DE882975C publication Critical patent/DE882975C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18Compositions 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 mixtures of the silica-lime type
    • C04B28/184Compositions 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 mixtures of the silica-lime type based on an oxide other than lime

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Verfahren zur Herstellung rissefre-ier poröser Bausteine aus Braunkohlenfilterasche In der Zementindustrie setzt man dem normalen Portlandzemeint: zur Regeilung der Abbind!eizeiten: Ca:lciiumsu,lfa,t in. Form von Gips, Ca, S04 -I- a H20, zu. Dieser Gipsgehalt: darf 3 % nicht überschreiten,. E s war nun gelungen:, aus Bra.unl<ohleinhlteraischei von kolloidaler Feinheit, ,deren Mindestcalciumgehalt als Ca0 d.oo/o, aber nicht mehr als 65% beträgt und, deren. Veirhäl.tnis von CaJCiumoxyd zu Eiseis noxyd -f- Magneisiumoxyd; der rormel (der Wortkanin bis auf 3,0 siteiigen) entspricht, poiröse! Bausteinie mit oder ohne Zugabe von Sand und wei:teirhi i mit oder ohne Zugabe von, Zement in: Weise, zu fertigen:, wobei die Härtung beii Raumteimpeiraitur oder mit: Hilfe überhitzten Dampfes vorgenommen wird., Zur Herstellung der porösen, Steinei wird die Filteirasche mit nicht mehr als, dein Hälfte ihres Gewichtes mit warmem Waisiser von; 5o biss 6o° angemacht und das Schaummittel gleichzeitig mit dem Wasser oder nachträglich zugesetzt. Natron oder Kaliwasserglas kann zugefügt werden.Process for the production of crack-free porous building blocks from lignite filter ash. In the cement industry, the normal portland zemein is used to regulate the setting times: Ca: lciiumsu, lfa, t in the form of gypsum, Ca, S04 -I- a H20. This gypsum content: must not exceed 3%. It was now a success: from brown oil containing colloidal fineness, the minimum calcium content of which is Ca0 doo / o, but not more than 65%, and whose. Ratio of calcium oxide to ice ice oxide -f- magnesium oxide; the rormel (corresponds to the word Kanin up to 3.0 sides), poirose! Building blocks with or without the addition of sand and white, with or without the addition of, cement in: manner, to manufacture, whereby the hardening is carried out with room filling or with: the help of superheated steam Filter ash with no more than your half their weight with warm waisiser from; 5o to 6o ° and the foam concentrate added at the same time as the water or afterwards. Soda or potassium water glass can be added.

Der Brei wird rasch geschlagen in entsprechenden Maschinen. Nach Gießen ins Formeln erfolgt die Härtung in, feu chteir- Luft odar ins überhitztem Dampf. Es. zeigte sich nun, daß die fertigen Steiinci oftmals, nach Wochen; oder Monaten Risse erhielten, insbesondere Steinei, die in überhitztem. Dampf gehärtet warLen. Die,- Erscheinung ist. in, erster Lidlie nicht auf das Sehwinden des Gesteins zurü,ckzuführen und einer damit verbundenen höheren Kraft der Zusammenziehung über die Kraft der Zugfestigkeit, sondern auf den hohen Gehalt an Sulfaten, insbesondere Cadcium-sulfat; sie trat ebenso bei einem Gehalt von etwa 30 bis 45 0/0- Sand i,, z. B. feinem Quarzsand, auf. Diese Sulfate verursachen das Treiben und damit Sprengen dies Verbandes. Deir Gehalt an Sulfaten von 5 bis, g°/o zeigt, dafi der größte Teil als: Cal,ciumsulfat vorliegen ruß. Dies Ca S04, welches beim Anmachen der porösem; Steine in Ca S04 +:2 H20 übergeht, verliert bei hoher Temperatur wiedersein Wasser. (Bei noTmadem Druck siedet Gips .bei ioi,5°.) Nach Abkühlung und Lägeirung der Steinei nimmst das Calciurusulfat wieder Wasser auf undkamn diaddurch,denVer'b#and I sprengen.The pulp is quickly beaten in appropriate machines. After pouring into the formulas, hardening takes place in feu chteir air or in superheated steam. It. it was now found that the finished stone often, after weeks; or months ago cracked eggs, especially stone eggs that were in overheated. Steam hardened. The, - appearance is. In, firstly, Lidlie cannot be attributed to the windy sight of the rock and the associated higher force of contraction over the force of tensile strength, but to the high content of sulphates, especially cadcium sulphate; it also occurred at a level of about 30 to 45 0/0 sand i ,, z. B. fine quartz sand. These sulfates cause this association to drift and thus burst. The sulphate content of 5 to .g% shows that the greater part is present as calcium sulphate soot. This Ca SO4, which when the porous; Stones in Ca S04 +: 2 H20 passes over, loses its water again at high temperatures. (If the pressure is not high, plaster of paris boils at 10.5 °.) After the stones have cooled and stored, the calcium sulphate absorbs water again and is able to get through the joint and break it up.

Es wurde gefunden, daß durch Hinzufügen von 5 bis 15 % calcinierteTonerde oder vonTonerdehydrat oder von Abfällen gebirannten Tons. au-s der, kearämiscben Industrie die Rissebiildung der Steine, nach dem Härtungsprozeißi zurückgedrängt wurde. Eine endgültige, sichere Lösung konnte jedoch auf diese Weise nicht erzieht werden. Dies; gelang erst dwr'ch Zugabe von 5 bis io% B,ariumoxydi oder einer Mischung von i,7 bis. 50%o Ba,ri,umoxyd: mit 1,5 bis 2,5% Ätznatron (Na OH), beide in, wäßriger Lösung auf die Gesamtmenge zugegeben: Auch kann: dass: ;ganzes Rariumoxyd durch dlie äquivalente Menage Na OH ersetzt wetrden. Es ist dabei gleichgültig, o#b die Filterasche 10 bda q.50/0 Sand, z. B. feinem Quarzsand; o&r auch -geringe Menagen Zement beigemischt erhält. Naturgemäß erniedrigt sieh dann der Alkalienzusatz. Durch die Zugabe von Bariumoxyd wird durch Bildung von schwerlöslichem Sulfat und Zurückdrängung der gesamten sauren Su.lfatwirkung infolge der Alkalkm die Ris.sebildung der Steine unterbunden und damit auch gleichzeitig die Druckfestigkeit erhöht.It has been found that adding 5 to 15% calcined clay or of alumina hydrate or clay fired from waste. besides, kearemia Industry the formation of cracks in the stones, pushed back after the hardening process became. A definitive, safe solution, however, could not be educated in this way will. This; succeeded only by adding 5 to 10% B, ariumoxydi or a mixture from i, 7 to. 50% o Ba, ri, umoxyd: with 1.5 to 2.5% caustic soda (Na OH), both in water Solution added to the total amount: Also can: that:; whole Rariumoxide through The equivalent cruet Na OH can be replaced. It doesn’t matter whether they are Filter ash 10 bda q.50 / 0 sand, e.g. B. fine quartz sand; o & r also - small cruets Receives mixed with cement. Naturally, the addition of alkali is then reduced. By the addition of barium oxide is caused by the formation of poorly soluble sulphate and displacement The formation of cracks in the stones is due to the total acidic sulphate effect as a result of the alkali prevented and thus also increased the compressive strength at the same time.

Claims (4)

PATENTANSPRÜCHE: r. Verfahren zur Hewsteddung rissefreier poröser Bausteine aus Bräunkohlenfiltemasche von kolloidlader Feinheit, in der dass Verhältnis von Ca O : Fe203 -I- Mg 0 = i,5 bis 3 beträgt; dadurch gekennzeichnet, daß die Braunkohlenfilterasche nach. Zusatz von 5 bis zo0/a Bariu@moxyd in bekannter Weise verformt und die Foirmlinge ans der Luft oder durch Dampfbärtung gehärtet weirdden. PATENT CLAIMS: r. Method for Hewsteddung crack-free porous Building blocks from brown coal filter mesh of colloidal fineness, in the ratio of Ca O: Fe 2 O 3 -I-Mg 0 = 1.5 to 3; characterized in that the lignite filter ash after. Addition of 5 to 10 / a Bariu @ moxyd deformed in a known manner and the Foirmlinge hardened in the air or by steam hardening. 2. Verfahren: nach Anspruch i, dadurch gekenuzeichn st, d03 der Asche noch Sand und/ oder 5 bis 15 % Tonerdie oder Tonor!dehyddrat oder Abfälle von: gebrannitem Ton zugersetzt werden. 2. Method: according to claim i, thereby gekenuzeichn st, d03 of the ash still sand and / or 5 to 15% alumina or clay dehydrated or wastes of burned clay are added. 3. Verfahren. nach Anspruch. i oder 2, dadurch gekennzeichnet, daß das Buriumoxyd durch die äquivalente Menge NaOH völlig ersetzt wird. 3. Procedure. according to claim. i or 2, characterized in that the burium oxide by the equivalent Amount of NaOH is completely replaced. 4. Verfahren nach. Anspruch i oder 2, dadurch gekennzeichnet, daß eine Mischung von 1,7 bis 5% Bariumoxyd mit 1,5 bis 2,50/ö NaOH zugesetzt wird,.4. Procedure according to. Claim i or 2, characterized in that that a mixture of 1.7 to 5% barium oxide with 1.5 to 2.50 / ö NaOH is added ,.
DEV3331A 1951-04-28 1951-04-28 Process for the production of crack-free porous building blocks from brown coal filter ash Expired DE882975C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV3331A DE882975C (en) 1951-04-28 1951-04-28 Process for the production of crack-free porous building blocks from brown coal filter ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV3331A DE882975C (en) 1951-04-28 1951-04-28 Process for the production of crack-free porous building blocks from brown coal filter ash

Publications (1)

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DE882975C true DE882975C (en) 1953-07-13

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DEV3331A Expired DE882975C (en) 1951-04-28 1951-04-28 Process for the production of crack-free porous building blocks from brown coal filter ash

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1076017B (en) * 1954-02-05 1960-02-18 Dr Karl Brandt Process for improving the setting behavior of binders based on latent hydraulic products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1076017B (en) * 1954-02-05 1960-02-18 Dr Karl Brandt Process for improving the setting behavior of binders based on latent hydraulic products

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