LT4506B - Gypsum retarder - Google Patents

Gypsum retarder Download PDF

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Publication number
LT4506B
LT4506B LT98-082A LT98082A LT4506B LT 4506 B LT4506 B LT 4506B LT 98082 A LT98082 A LT 98082A LT 4506 B LT4506 B LT 4506B
Authority
LT
Lithuania
Prior art keywords
gypsum
construction
retarder
curing
well
Prior art date
Application number
LT98-082A
Other languages
Lithuanian (lt)
Other versions
LT98082A (en
Inventor
Algimantas Kazragis
Gediminas Marčiukaitis
Gintaras Jurkėnas
Original Assignee
Vilniaus Gedimino technikos universitetas
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 Vilniaus Gedimino technikos universitetas filed Critical Vilniaus Gedimino technikos universitetas
Priority to LT98-082A priority Critical patent/LT4506B/en
Publication of LT98082A publication Critical patent/LT98082A/en
Publication of LT4506B publication Critical patent/LT4506B/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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/124—Amides
    • 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
    • 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
    • C04B2103/24—Hardening 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
    • C04B2111/72—Repairing or restoring existing buildings or building materials

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  • 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)

Abstract

The gypsum plaster hardening inhibitor consists of: carbamide and inorganic substance compound with a mass ratio of 40:1. The gypsum plaster hardening inhibitor may be used in construction and renovation works, as well as for industrial production of gypsum concrete products.

Description

Išradimas naudojamas statybos pramonėje.The invention is used in the construction industry.

Yra žinoma, kad statybinio gipso rišimosi ir kietėjimo procesui sulėtinti naudojami įvairūs lėtikliai (A. G. Komar: Stroitelnyje materialy i izdelija. M., “V skola”, 1988) - stalių, kaišų bei kazeino klijai, spyglių nuoviras, sulfitinio spirito žlaugtai, kalkių tešla, kalkių-klijų emulsija, taip pat kalio ir natrio fosfatai bei boratai, koncentruotas natrio chlorido tirpalas (praskiestas tirpalas procesą greitina) ir karštas vanduo. Išvardintų medžiagų panaudojimo trūkumas - ilga jų paruošimo (brinkinimo, virinimo, filtravimo) trukmė bei receptūros neapibrėžtumas (klijai, spyglių nuoviras, žlaugtai, kalkių-klijų emulsija), gipso - priedų mišinių išsisluoksniavimas bei sukietėjusio gipso mechaninio atsparumo sumažėjimas (kalkių tešla, fosfatai ir boratai), taip pat proceso komplikavimas vandens kaitinimu bei priedų poveikio neapibrėžtumu, nesant galimybės išlaikyti pastovią mišinio temperatūrą (karštas vanduo).Various retardants are known to slow down the process of binding and curing of gypsum in construction (AG Komar: Stroitelny materialy i dellelia. M., "V skola", 1988) - joinery, dowel and casein glue, needle decoction, sulfite spirit slurry, lime dough. , lime-glue emulsion as well as potassium and sodium phosphates and borates, concentrated sodium chloride solution (dilute solution speeds up the process) and hot water. The disadvantages of using the listed materials are the long preparation time (swelling, boiling, filtration) and the uncertainty of the formulation (glue, needle decoction, slurries, lime-glue emulsion), layering of gypsum-admixtures and reduction of hardened gypsum mechanical resistance (lime dough, phosphate borates), as well as complication of the process by heating the water and the uncertainty of the effect of the additives by not being able to maintain a constant temperature of the mixture (hot water).

Rekomenduojamą lėtiklį sudaro du komponentai. Vienas iš jų organinė, sudaranti klatratus, medžiaga - karbamidas, gaminamas AB “Achema” (Jonava). Antrasis - neorganinis junginys. Karbamido ir neorganinio junginio masių santykis kompozicijoje - 40:1. Abu komponentai lėtina neorganinio kietėjimo procesą, vienok, esant mažesniam komponentų masių santykiui, mišinys išsisluoksniuoja, o esant didesniam - sumažėja mechaninis sukietėjusio produkto atsparumas. Statybinio gipso kietėjimo lėtiklio veikimas remiasi ne koloidų absorbcija rišančiosios medžiagos dalelių paviršiuje, bet pastarųjų įstrigimu molekulėse klatratus sudarančios ' 25 medžiagos tuštumose. Lėtiklis lengvai tirpsta 10 - 20 °C temperatūros vandenyje. Naudojant šį lėtiklį, statybinio gipso kietėjimo trukmė gali būti pratęsta iki 90 min.The recommended retarder consists of two components. One of them is the organic material that forms the clathrates, urea, which is produced by AB “Achema” (Jonava). The second is an inorganic compound. The weight ratio of urea to inorganic compound in the composition is 40: 1. Both components slow the process of inorganic curing, however, at lower mass ratios of the components, the mixture is peeled off and, at higher, the mechanical resistance of the hardened product is reduced. The action of a building gypsum curing retarder is not based on the absorption of colloids on the surface of the binder particles but on the entrapment of the latter in the voids of the clathrate material. Slowly soluble in water at 10 to 20 ° C. With this retarder, the curing time of the building plaster can be extended up to 90 minutes.

Išradimo tikslas - Įgalinti statybininkus, naudojančius statybos remonto darbuose statybinio gipso skiedinius, atlikti darbus kokybiškai, be nereikalingos skubos bei iš anksto paruošiant didesnius skiedinio kiekius, tuo ekonomiškiau išnaudojant medžiagą.The purpose of the invention is to enable builders using mortar for construction repairs to perform the work in a qualitative manner, without unnecessary urgency, and by pre-preparing larger volumes of mortar, thus making the most economic use of the material.

Statybinio gipso kietėjimo lėtiklis gali būti panaudotas statybos remonto darbuose, taip pat gaminant gipsbetoninius panelius bei kitus dirbinius pramoniniu būdu.The curing retardant for gypsum can be used in construction repairs, as well as in the industrial production of gypsum panels and other articles.

Pagrindiniai išradimo esmę apibūdinantys požymiai ir privalumai:The main features and advantages characterizing the invention are as follows:

- įvedamas priedo kiekis tesudaro 4 % sauso lėtiklio, kietėjimo trukmė gali būti prailginta iki 90 min.,- additive content only 4% dry retarder, curing time can be extended up to 90 minutes,

- statybinio gipso skiedinys, turįs lėtiklio, panaudojimo metu 10 neišsisluoksniuoja,- the mortar containing the retardant plaster does not exfoliate during use,

- lėtiklio įvedimas į statybinio gipso skiedinį nesumažina sukretėjusio produkto mechaninio stiprumo,- the introduction of a retarder into the mortar does not reduce the mechanical strength of the product plastered,

- įvedant lėtiklį, gali būti naudojamas statybinis gipsas, gautas iš fosfogipso.- Construction gypsum derived from phosphogypsum may be used for introducing the retarder.

Claims (2)

IŠRADIMO APIBRĖŽTISDEFINITION OF INVENTION 1. Statybinio gipso kietėjimo lėtiklis, turintis organinių ir neorganinių 5 medžiagų, besiskiriantis tuo, kad jį sudaro organinės medžiagos karbamido ir neorganinės medžiagos mišinys, kai jų masių santykis atitinkamai yra 40 : L1. Building plaster hardening agent containing organic and inorganic substances 5, characterized in that it consists of a mixture of organic matter urea and inorganic material in a weight ratio of 40: L respectively. 2. Statybinio gipso kietėjimo lėtiklio, nurodyto 1 punkte, panaudojimas statybos ir remonto darbuose ir gipsbetonio dirbinių gamybai.2. Use of the gypsum curing retarder referred to in point 1 for use in construction and repair work and in the manufacture of gypsum concrete products.
LT98-082A 1998-06-02 1998-06-02 Gypsum retarder LT4506B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LT98-082A LT4506B (en) 1998-06-02 1998-06-02 Gypsum retarder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LT98-082A LT4506B (en) 1998-06-02 1998-06-02 Gypsum retarder

Publications (2)

Publication Number Publication Date
LT98082A LT98082A (en) 1998-12-28
LT4506B true LT4506B (en) 1999-05-25

Family

ID=19721981

Family Applications (1)

Application Number Title Priority Date Filing Date
LT98-082A LT4506B (en) 1998-06-02 1998-06-02 Gypsum retarder

Country Status (1)

Country Link
LT (1) LT4506B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793235A (en) 1954-09-27 1957-05-21 Du Pont Recovery of glycols from polyester production

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793235A (en) 1954-09-27 1957-05-21 Du Pont Recovery of glycols from polyester production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
A.G. KOMAR: "Stoitelnyje materialy i izdelija"

Also Published As

Publication number Publication date
LT98082A (en) 1998-12-28

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