CS276047B6 - White Portland cement - Google Patents

White Portland cement Download PDF

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Publication number
CS276047B6
CS276047B6 CS881104A CS110488A CS276047B6 CS 276047 B6 CS276047 B6 CS 276047B6 CS 881104 A CS881104 A CS 881104A CS 110488 A CS110488 A CS 110488A CS 276047 B6 CS276047 B6 CS 276047B6
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CS
Czechoslovakia
Prior art keywords
weight
white portland
cement
portland cement
gypsum
Prior art date
Application number
CS881104A
Other languages
Czech (cs)
Slovak (sk)
Inventor
Marta Ing Ligdova
Marian Ing Csc Miazdra
Ladislav Ing Ligda
Milan Harsani
Pavol Ing Hascik
Stefan Burcl
Danuse Ing Blazkova
Frantisek Ing Facek
Original Assignee
Marta Ing Ligdova
Marian Ing Csc Miazdra
Ladislav Ing Ligda
Milan Harsani
Pavol Ing Hascik
Stefan Burcl
Danuse Ing Blazkova
Frantisek Ing Facek
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 Marta Ing Ligdova, Marian Ing Csc Miazdra, Ladislav Ing Ligda, Milan Harsani, Pavol Ing Hascik, Stefan Burcl, Danuse Ing Blazkova, Frantisek Ing Facek filed Critical Marta Ing Ligdova
Priority to CS881104A priority Critical patent/CS276047B6/en
Publication of CS276047B6 publication Critical patent/CS276047B6/en

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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
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/062—Purification products of smoke, fume or exhaust-gases
    • C04B18/064—Gypsum
    • 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
    • C04B2103/20—Retarders
    • C04B2103/22—Set retarders
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Riešenie sa týká bieleho portlandského ce-: mentu s regulátorem doby tuhnutia. Pre požadované parametre bieleho portlandského cementu ako regulátora tuhnutia sa používá odpadný priemyslový sádrovec z leštiaren- ských kalov znečistěných od 3 do 25 % hmotnostných fluoridu vápenatého, s obsahom oxi- dov železa pod 0,4 % hmotnostných, s be- lostou nad 80" na Standard síranu barnatého. Obsah odpadného sadrovca v bielom portland- skom cemente je od 4 do 11 % hmotnostných.The solution relates to a white Portland wall with a setting time controller. For the required parameters of white Portland cement as a solidification regulator, waste industrial gypsum from polished sludge contaminated with from 3 to 25% by weight of calcium fluoride is used, with an iron oxide content below 0.4% by weight, with an above 80% by weight. Barium sulphate standard The content of gypsum waste in white Portland cement is from 4 to 11% by weight.

Description

Vynález sa týká bieleho portlandského cementu s regulátorem doby tuhnutia. V podstatě vynález rieši reguláciu doby tuhnutia bieleho portlandského cementu.The invention relates to white Portland cement with a setting time controller. In essence, the invention addresses the setting time of the setting time of white Portland cement.

Biely portlandský slinok sa oproti běžnému portlandskému slinku líši v zásadě v obsahu farbiacich oxidov, najma oxidu železitého, ktorého obsahuje najviac 0,3 % hmotnostných. Z mineralogického hladiska biely portlandský slinok má znížený obsah tetrakalcium aluminát ferritu (C^AF) do 1 % hmotnostného.White Portland clinker differs in principle from conventional Portland clinker in the content of coloring oxides, in particular iron oxide, which contains not more than 0.3% by weight. From a mineralogical point of view, white Portland clinker has a reduced content of tetracalcium aluminate ferrite (C ^ AF) to 1% by weight.

Tuhnutie bieleho portlandského cementu okrem vyzrážania koloidných hydrokremičitanov a znižovania rozpustnosti hlinitanov, prechodom na nerozpustné soli, resp. tvorby polopriepustnej blány okolo hydratačného zrna si vyžaduje, aby výsledný produkt před i po hydratácii si zachoval bielu farbu, resp. aby přísada neovplyvníla (neznížila) požadovaná bielu farbu výsledného produktu.Solidification of white Portland cement in addition to precipitation of colloidal hydrosilicates and reduction of solubility of aluminates, by transition to insoluble salts, resp. The formation of a semi-permeable membrane around the hydration grain requires that the resulting product retain its white color before and after hydration, resp. so that the additive does not affect (reduce) the desired white color of the final product.

Přísada použitá pre reguláciu doby tuhnutia bieleho portlandského cementu musí okrem samotného zabezpečenia regulácie spínat i požiadavku na bělost.The additive used to control the setting time of white Portland cement must, in addition to providing the control itself, also switch to the whiteness requirement.

Je známe, že do běžného portlandského cementu možno přidávat odpadný sádrovec, pričom je nutné dodržat obsah Fe^11 do 35 % hmotnostných (vi3. autorské osvedčenie č. 203 526), ktorý je sfarbený do hnedo-červena a preto nie je vhodný ako regulátor tuhnutia bieleho portlandského cementu. V odpadnom sádrovci použitom podlá tohto autorského osvedČenia je obsiahnutý fluorid vápenatý do 1 % hmotnostného.It is known that waste gypsum can be added to ordinary Portland cement, while it is necessary to keep the content of Fe ^ 11 up to 35% by weight (see author's certificate no. 203 526), which is colored brown-red and is therefore not suitable as a regulator. setting of white Portland cement. Calcium fluoride up to 1% by weight is present in the waste gypsum used according to this copyright certificate.

V súčasnosti sa na reguláciu doby tuhnutia bieleho portlandského cementu v ČSSR a i v zahraničí vačšinou používajú sádrové črepy. Je to odpad, ktorý vzniká zo sádrových foriem pri výrobě keramiky. Ich bělost sa obvykle pohybuje v rozmedzí 80 až 83’ na Standard BaSO4· Po chemickéj stránke obsahujú dihydrát síranu vápenatého (CaSO^ . 21^0). Množstvo sádrových črepov vhodných na reguláciu doby tuhnutia bieleho portlandského cementu produkovaných v ČSSR nie je dostatečné na pokrytie celej kapacity výroby bieleho portlandského cementu. Preto část sádrových črepov je zabezpečovaná dovozom.At present, gypsum shards are mostly used to regulate the setting time of white Portland cement in the Czechoslovak Socialist Republic and abroad. It is a waste that arises from gypsum molds in the production of ceramics. Their brightness is typically between 80 and 83 'to the standard BaSO4 · Chemically, comprising calcium sulphate dihydrate (CaSO ^. ^ 21 0). The amount of gypsum shards suitable for regulating the setting time of white Portland cement produced in the Czechoslovak Socialist Republic is not sufficient to cover the entire production capacity of white Portland cement. Therefore, part of the gypsum shards is secured by imports.

Uvedený problém rieši vynález, ktorého predmetom je biely portlandský cement. Podstatou vynálezu je, že ako přísada pre reguláciu doby tuhnutia sa použije 4 až 11 % hmotnostných odpadného sadrovca s obsahom od 3 do 25 % hmotnostných fluoridu vápenatého (CaFj). Odpadný sádrovec vzniká neutralizáciou leštiarenských kalov pri výrobě skla s nadbytkem hydroxidu vápenatého do 10 % hmotnostných. Obsah oxidov železa je u tohto odpadu pod 0,4 % hmot, a bělost nad 80’ na Standard BaSO^.This problem is solved by the invention, which relates to white Portland cement. The essence of the invention is that 4 to 11% by weight of waste gypsum with a content of from 3 to 25% by weight of calcium fluoride (CaF 3) is used as an additive for controlling the setting time. Waste gypsum is formed by neutralization of polishing sludge in the production of glass with an excess of calcium hydroxide up to 10% by weight. The iron oxide content of this waste is below 0.4% by weight, and the whiteness is above 80 ° to the BaSO 4 standard.

Výhodou použitia odpadného sadrovca oproti sádrovým črepom a oproti autorskému osvedčeniu č. 203 526 sú zvýšené pevnosti cementu a vyšší hmotnostný přídavek do cementu, čo ovplyvní i ekonomiku výroby. Ďalšou výhodou je vysoká bělost odpadného sadrovca použitého typu. *The advantage of using waste gypsum over gypsum shards and over the author's certificate no. 203,526 are increased cement strengths and higher weight addition to cement, which will also affect the economy of production. Another advantage is the high whiteness of the waste gypsum of the type used. *

Vyšším účinkom sú zvýšené pevnosti v tlaku a vyšší přídavek odpadného sadrovca, čo sa dokumentuje v ňásledujících případech:The higher effect is increased compressive strength and higher addition of waste gypsum, which is documented in the following cases:

Příklad prevedenia:Example design:

K bielemu portlandskému slinku zo ZCV, š.p. RohoŽník, zomletého na měrný povrch 400 m2.kg sme přidali za mletia sádrové črepy a odpadný sádrovec. Vzhladom k odlišným obsahom dihydrátu síranu vápenatého (CaSO^ . 21^0) u jednotlivých regulátorov tuhnutia boli množstvá prídavkov regulované podlá obsahu SO3 stahované na cement.To the white Portland clinker from ZCV, š.p. RohoŽník, ground to a specific surface area of 400 m 2 .kg, we added gypsum shards and waste gypsum during grinding. Due to the different contents of calcium sulphate dihydrate (CaSO 4. 21%) in the individual setting regulators, the amounts of additives controlled according to the SO 3 content were drawn onto the cement.

Skúšky pevnosti, stanovenie obsahu SO^ a stanovenie bělosti boli urobené podlá ČSN 72 2117, ČSN 72 2111, a ČSN 72 1089.Strength tests, determination of SO 2 content and determination of whiteness were performed according to ČSN 72 2117, ČSN 72 2111, and ČSN 72 1089.

1 - 1 - 4,4 4.4 % % sádrových plaster črepov shards 2,0 2.0 % % so3 Sat 3 V IN cemente cement 0,0 0.0 % % CaF2 CaF 2 V IN cemente cement 2 - 2 - 6,- 6, - % % odpadného waste sadrovca gypsum 2,0 2.0 % % so3 Sat 3 v in cemente cement 0,8 0.8 % % CaF2 CaF 2 v in cemente cement 3 - 3 - 5,5 5.5 % % sádrových plaster črepov shards 2,5 2.5 % % s°3 s ° 3 v in cemente cement 0,0 0.0 % % CaF2 CaF 2 v in cemente cement 4 - 4 - 7,5 7.5 % % odpadného waste sadrovca gypsum 2,5 2.5 % % s°3 s ° 3 v in cemente cement 1,0 1.0 % % CaF2 CaF 2 v in cemente cement 5 - 5 - 6,7 6.7 % % sádrových plaster črepov shards 3,0 3.0 % % so3 Sat 3 v in cemente cement 0,0 0.0 % % CaF2 CaF 2 v in cemente cement 6 - 6 - 9,0 9.0 % % odpadného waste sadrovca gypsum 3,0 3.0 % % so3 Sat 3 v in cemente cement 1,2 1.2 % % CaF2 CaF 2 v in cemente cement 7 - 7 - 7,8 7.8 % % sádrových plaster črepov shards 3,5 3.5 % % s°3 s ° 3 v in cemente cement 0,0 0.0 % % CaF2 CaF 2 v in cemente cement 8 - 8 - 10,4 10.4 % % odpadného waste sadrovca gypsum 3,5 3.5 % % so3 Sat 3 v in cemente cement 1,4 1.4 % % CaF2 CaF 2 v in cemente cement

TABULKATABLE

P.č. P.č. SO3 v cemente (zistené analyt.)SO 3 in cement (analytes determined) Pevnost v tlaku (MPa) Compressive strength (MPa) bělost (’) BaSO4 whiteness (') BaSO 4 3 dni 3 days ' 28 dní '28 days 1 1 1,97 1.97 32,5 32.5 55,0 55.0 81 81 2 2 1,79 1.79 37,4 37.4 61,9 61.9 81 81 3 3 2,22 2.22 35,8 35.8 59,6 59.6 81 81 4 4 2,16 2.16 37,3 37.3 60,5 60.5 82 82 5 5 2,65 2.65 33,6 33.6 61,3 61.3 81 81 6 6 2,73 2.73 37,1 37.1 62,6 62.6 82 82 7 7 3,18 3.18 27,3 27.3 61,7 61.7 81 81 8 8 3,28 3.28 35,8 35.8 66,7 66.7 83 83

PATENTOVÉ NÁROKYPATENT CLAIMS

Claims (1)

PATENTOVÉ NÁROKYPATENT CLAIMS Biely portlandský cement obsahujúci okrem bieleho portlandského slinku přísadu odpadného sadrovca s belostou nad 80’ na Standard síranu barnatého s obsahom oxidov železa pod 0,4 % hmot., vyznačujúci sa tým, že v přísadě odpadného sadrovca je přítomný fluorid vápenatý s obsahom od 3 do 25 % hmotnostných a že obsah odpadného sadrovca v bielom portlandskom cemente je od 4 do 11 % hmotnostných.White Portland cement containing, in addition to white Portland clinker, a waste gypsum additive with a whiteness above 80 'to a barium sulphate standard with an iron oxide content of less than 0,4% by weight, characterized in that calcium fluoride with a content of 3 to 3 g / w is present in the waste gypsum additive 25% by weight and that the content of waste gypsum in white Portland cement is from 4 to 11% by weight.
CS881104A 1988-02-22 1988-02-22 White Portland cement CS276047B6 (en)

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