SE455308B - PROTECTIVE LAYER INCLUDING GYPS, CEMENT AND ETHYL HYDROXICELLULOSA - Google Patents

PROTECTIVE LAYER INCLUDING GYPS, CEMENT AND ETHYL HYDROXICELLULOSA

Info

Publication number
SE455308B
SE455308B SE8203897A SE8203897A SE455308B SE 455308 B SE455308 B SE 455308B SE 8203897 A SE8203897 A SE 8203897A SE 8203897 A SE8203897 A SE 8203897A SE 455308 B SE455308 B SE 455308B
Authority
SE
Sweden
Prior art keywords
cement
water
gypsum
protective layer
ethyl
Prior art date
Application number
SE8203897A
Other languages
Swedish (sv)
Other versions
SE8203897D0 (en
SE8203897L (en
Inventor
B L C Hellstrom
N G Johansson
Original Assignee
Boliden Ab
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 Boliden Ab filed Critical Boliden Ab
Priority to SE8203897A priority Critical patent/SE455308B/en
Publication of SE8203897D0 publication Critical patent/SE8203897D0/en
Priority to DK267083A priority patent/DK158742C/en
Priority to FI832297A priority patent/FI71334C/en
Priority to NO832259A priority patent/NO156207C/en
Publication of SE8203897L publication Critical patent/SE8203897L/en
Publication of SE455308B publication Critical patent/SE455308B/en

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
    • 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
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/28—Polysaccharides or derivatives thereof
    • C04B26/285—Cellulose or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/02—Inorganic materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/14—Macromolecular materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing

Landscapes

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

Abstract

Protective coating layer which comprises plaster, cement, hydroxyethyl cellulose and a quantity of water which is required for setting the plaster and the cement. The protective layer which is produced can be used for outdoor storage for protecting against dust accumulation or water-leaching or as a protection against fire, in addition to which the layer, after application, dries rapidly, is water-soluble and can readily be strengthened mechanically.

Description

UI 10 15 20 25 30 35 455 sos É 2 liga och alltså ej medger skydd vid utomhuslagring. Vidare stelnar inte produkten tillräckligt snabbt, vilket är ett annat krav man reser vid utomhuslagring. UI 10 15 20 25 30 35 455 sos É 2 liga and thus does not allow protection during outdoor storage. Furthermore, the product does not solidify quickly enough, which is another requirement when traveling outdoors.

Ytterligare andra dammförhindrande skikt är kända, GB-A l,245,l56, GB-A 1,267,62l och GB-A 1,267,617, varvid ett hygroskopiskt salt och exempelvis gips blandas med vatten och läggas på de produkter, vars damning man vill för- hindra. Även dessa skikt är vattenlösliga.Still other dust-preventing layers are known, GB-A 1, 245, 156, GB-A 1,267,62l and GB-A 1,267,617, in which a hygroscopic salt and, for example, gypsum are mixed with water and applied to the products whose dusting is to be prevented. hinder. These layers are also water-soluble.

En metod att undertrycka damning vid bergbrytning är känd genom GB-A 1,39l,ll5, varvid berget begjutes med en vattenlösning av en polysackarid, såsom guar gum, natriumkarboxylmetylcellulosa. Denna lösning kan ge ett momentant skydd mot damning men ger inget varaktigt skydd.One method of suppressing dust mining is known from GB-A 1,391,155, wherein the rock is sprayed with an aqueous solution of a polysaccharide, such as guar gum, sodium carboxylmethylcellulose. This solution can provide instant protection against dusting but does not provide lasting protection.

Ett flambeständigt skyddsskíkt är känt genom SE-A 7603820-7, vilket skikt be- står av en oorganisk komponent vilken omfattar en vattenlösning av ett alkali- metallsilikat, lera och asbestfibrer samt en organisk komponent som omfattar en vattenlösning av karboxylmetylcellulosa, en stärkelseester, och/eller ett dext- rin, varvid den organiska komponenten utgör upp till nagra procent av den totala kompositionen. En sådan komposition uppvisar emellertid bland annat alltför lång härdningstid, > 48 tim.A flame retardant protective layer is known from SE-A 7603820-7, which layer consists of an inorganic component comprising an aqueous solution of an alkali metal silicate, clay and asbestos fibers and an organic component comprising an aqueous solution of carboxylmethylcellulose, a starch ester, and / or a dextrin, the organic component constituting up to a few percent of the total composition. However, such a composition has, among other things, too long a curing time,> 48 hours.

De krav som reses på ett skyddsskikt för utomhusskydd är bland annat att det skall effektivt skydda mot väta helst inom några timmmar och senast inom 24 tim; att det inte skall vara lösligt inom rimlig tid, vilket innebär 6-8 mån; att det skall vara miljövänligt och inte skada belagd produkt; samt att det skall vara lätt forcerbart så att lagrade produkter är lätt tillgängliga. Vid lagring av låg- värda produkter får dessutom skyddet inte kosta alltför mycket.The requirements that are raised for a protective layer for outdoor protection include that it must effectively protect against moisture, preferably within a few hours and no later than within 24 hours; that it should not be soluble within a reasonable time, which means 6-8 months; that it should be environmentally friendly and not damage the coated product; and that it should be easily forced so that stored products are easily accessible. When storing low-value products, the protection must not cost too much.

Beskrivning av föreliggande uppfinning Det har nu överraskande visat sig möjligt att man kan tillmötesgå ställda krav genom föreliggande uppfinning, som karaktäriseras av att skyddsskiktet omfattar cement, gips, etylhydroxietylcellulosa samt vatten i en mängd tillräcklig för att ge stelning av gips och cement.Description of the present invention It has now surprisingly been found possible to meet the requirements of the present invention, which is characterized in that the protective layer comprises cement, gypsum, ethyl hydroxyethylcellulose and water in an amount sufficient to provide solidification of gypsum and cement.

Ytterligare karaktäristika för uppfinningen framgår av hithörande patentkrav. 10 15 20 25 30 35 3 455 308 Exem 1 En 196 vattenlösning av etylhydroxietylcellxilosa (Bermoco1l® E 481, Berol Kemi, Stenungsund, Sverige) framställdes. I ett blandningskärl som rymde 7 m3 satsades därefter totalt 5 m3 bestående av 44 delar CaSO4 - 21-120, 22 delar cement samt 34 delar av nämnda 1% etylhydroxietylcellulosa-vattenlösning. Den totala vikten var 6,7 ton. Blandningen gjordes homogen genom omrörning med paddelomrörare under 1 tim.Further characteristics of the invention appear from the appended claims. 3 15 20 25 30 35 3 455 308 Example 1 A 196 aqueous solution of ethylhydroxyethylcellulose (Bermoco11® E 481, Berol Kemi, Stenungsund, Sweden) was prepared. In a mixing vessel containing 7 m 3, a total of 5 m 3 was then charged, consisting of 44 parts of CaSO 4 - 21-120, 22 parts of cement and 34 parts of the 1% ethyl hydroxyethylcellulose aqueous solution. The total weight was 6.7 tons. The mixture was made homogeneous by stirring with paddle stirrer for 1 hour.

Denna slurry med en viskositet av ca 1000 cPs sprutades över ett sandupplag som innehöll ca 1200 m3 sand, varvid först toppen och därefter sidorna begöts.This slurry with a viscosity of about 1000 cPs was sprayed over a sand storage containing about 1200 m3 of sand, whereby first the top and then the sides were sprayed.

Det utlagda skiktet torkade snabbt och var efter ca 11 tim hårt. Skyddsskiktet hade en medeltjocklek av ca 5 mm. Skyddsskiktet var helt stabilt inom 20 tim, var praktiskt taget olöslígt i vatten och uppvisade efter stelning en vattenper- meabilitet av 1 - l0'5 meter/sekund.The applied layer dried quickly and was hard after about 11 hours. The protective layer had an average thickness of about 5 mm. The protective layer was completely stable within 20 hours, was practically insoluble in water and after solidification showed a water permeability of 1 - 10'5 meters / second.

Exem A-D Olika beläggningsskikt med andra komponenter framställdes i jämförande syfte enligt nedanstående.Examples A-D Different coating layers with other components were prepared for comparative purposes as follows.

A 200 g H20 200 g CaSO4 - ZHZO 100 g cement 5 g karboximetylcellulosa a mg H20 sug caso4-2H¿o 20g cement 20g bentonit C 40 g ot-hemicellulosa 20 g bentonit 140 g CaS04 - 21120 200 g H20 10 15 20 25 30 35 455 308 4 D 175 g H20 200 g CaSO4 - 2H2o 100 g cement 3 g karboximetylcellulosa Kompositionerna enligt A och D gav stabila skyddsskikt först efter mer än 2 dygn. Kdmpositionerna enligt B och C stelnade inom rimlig tid 10-24 tim, men var båda vattenlösliga.A 200 g H20 200 g CaSO4 - ZHZO 100 g cement 5 g carboxymethylcellulose a mg H20 sug caso4-2H¿o 20g cement 20g bentonite C 40 g ot-hemicellulose 20 g bentonite 140 g CaSO4 - 21120 200 g H20 10 15 20 25 30 455 308 4 D 175 g H 2 O 200 g CaSO 4 - 2H 2 O 100 g cement 3 g carboxymethylcellulose The compositions according to A and D gave stable protective layers only after more than 2 days. The core compositions of B and C solidified within a reasonable time of 10-24 hours, but were both water soluble.

Vid framställning av kompositioner enligt föreliggande uppfinning tillföres lämp- ligen bara så mycket vatten som bindes av skíktet vid dess stelning, dvs huvud- sakligen upptages av cementen. Lämpliga viskositeter vid beredning, transport och applícering är 500 - 1500 cPs.In the preparation of compositions according to the present invention, suitably only as much water is added as is bound by the layer during its solidification, i.e. is mainly absorbed by the cement. Suitable viscosities for preparation, transport and application are 500 - 1500 cPs.

Etylhydroxietylcellulosan som användes som bindemedel kan ingå i en mängd av 0,2 - 396 i vattenlösningen. Vid högre mängder gar det ej att hantera vatten- lösningen på grund av cellulosaderivatets svällning.The ethylhydroxyethylcellulose used as a binder may be present in an amount of 0.2 to 396 in the aqueous solution. At higher amounts, it is not possible to handle the aqueous solution due to the swelling of the cellulose derivative.

Mängden cement i produkten kan självklart vara stor men fördyrar då också denna avsevärt. Viktrelationerna mellan gips och cement bör vara ca 3:1, men aldrig överstiga 6:1 eftersom lösligheten då blir alltför stor och den fysikaliska styrkan reduceras. Lämpligen bör ur kostnadssynpunkt gípsmängden inte vara mindre än mängden cement.The amount of cement in the product can of course be large, but then also makes it considerably more expensive. The weight ratios between gypsum and cement should be about 3: 1, but never exceed 6: 1 as the solubility then becomes too great and the physical strength is reduced. From a cost point of view, the amount of gypsum should not be less than the amount of cement.

Den ingående gipsen bör inte vara alltför grovkornig utan ha en huvudsaklig par- tikelstorlek under 0,25 mm, och med samtliga partiklar mindre än 1 mm.The constituent gypsum should not be too coarse-grained but have a main particle size below 0.25 mm, and with all particles less than 1 mm.

Den i exemplen ovan angivna gipsen har varit en dihydratgíps, CaS04 - 2320, men även anhydritgips eller semihydratgips kan användas. Vid användning av senare angivna kvaliteter sker en starkare stelning och sammanbindning i sam- band med att gipset omlagras till dihydratform. Vid användning av anhydritgips och semihydratgips mäste vattenmängden i blandningsskedet öka något. Total- mängden i det slutliga skiktet är dock densamma.The gypsum given in the examples above has been a dihydrate gypsum, CaSO 4 - 2320, but anhydrite gypsum or semi-hydrated gypsum can also be used. When using later specified qualities, a stronger solidification and bonding takes place in connection with the gypsum being rearranged into a dihydrate form. When using anhydrite gypsum and semi-hydrate gypsum, the amount of water in the mixing stage must increase slightly. However, the total amount in the final layer is the same.

För att accelerera härdningen kan CaCl2 tillföras skyddsskiktsprodukten i en 10 15 5 455 308 mängd av upp till 2 viktprocent.To accelerate the curing, CaCl 2 can be added to the protective layer product in an amount of up to 2% by weight.

Beroende pà typ av upplag och produkt, lagringsplats, och en rad andra omstän- digheter kan skyddsskiktets tjocklek variera mellan 1-10 mm, företrädesvis ce 2-5 mm.Depending on the type of storage and product, storage location, and a number of other circumstances, the thickness of the protective layer can vary between 1-10 mm, preferably about 2-5 mm.

Vid tillverkning på plats intill ett upplag kan det vara svårt att fastställa lämplig viskositet för produkten. Det har därvid visat sig lämpligt att genomföra ett trattprov, dvs att man fyller en tratt med lösning och tar tid på hur snabbt eller långsamt tratten tömmes. Vískositeten för en produkt med sammansättningen 225 g CaSO4 - 2H20, 75 g cement, 1,5 g etylhydroxietylcellulosa och 180 g vat- ten anses lämplig. Denne produkt rinner på 50 sekunder igenom en tratt med höjden 80 mm, övre diameter 120 mm och nedre diameter 14 mm. Är vatten- mängden 170 g är tiden 90 sekunder och är vattenmängden 190 g är tiden 35 se- kunder.When manufactured on site next to a warehouse, it can be difficult to determine the appropriate viscosity for the product. It has then proved appropriate to carry out a funnel test, ie to fill a funnel with solution and take time on how quickly or slowly the funnel is emptied. The viscosity of a product with the composition 225 g CaSO 4 - 2H 2 O, 75 g cement, 1.5 g ethylhydroxyethylcellulose and 180 g water is considered suitable. This product flows in 50 seconds through a funnel with a height of 80 mm, upper diameter 120 mm and lower diameter 14 mm. If the water volume is 170 g, the time is 90 seconds and if the water volume is 190 g, the time is 35 seconds.

Claims (4)

10 15 20 455 508 s PATENTKRAV10 15 20 455 508 s PATENT REQUIREMENTS 1. Skyddsbeläggningskikt omfattande gips, k ä n n e t e c k n a t av att det förutom gips omfattar cement och etylhydroxietylcellulosa samt erforderlig mängd vatten för stelníng av gips och cement, samt eventuellt en tillsats av CaClg, varvid víktförhållandet gipszcement understiger 6:1, mängden vatten är så stor att en viskositet av 500 - 1500 cPs föreligger; och varvid mängden etylhydroxíetylcellulosa utgör 0,2 - 3 viktprocent av ingående vatten.Protective coating layer comprising gypsum, characterized in that in addition to gypsum it comprises cement and ethyl hydroxyethylcellulose and the required amount of water for solidification of gypsum and cement, and optionally an addition of CaCl a viscosity of 500 - 1500 cPs is present; and wherein the amount of ethylhydroxyethylcellulose is 0.2 to 3% by weight of the constituent water. 2. Skyddsbeläggningsskikt enligt krav 1, k ä n n e t e c k n a t av att vikt- förhållandet gípswement är 3:1.Protective coating layer according to Claim 1, characterized in that the weight ratio gípswement is 3: 1. 3. Skyddsbeläggningsskikt enligt ett eller flera av kraven 1-2, k ä n n e- t e c k n a t av att det dessutom innehåller CaClz i en mängd av upp till 2 vikt- procent.Protective coating layer according to one or more of Claims 1 to 2, characterized in that it also contains CaCl 2 in an amount of up to 2% by weight. 4. Skyddsbeläggningsskikt enligt ett eller flera av föregående krav, k ä n- n e t e c k n a t av att det är utlagt med en skikttjocklek av 1-10 mm, företrä- desvis 2-5 mm.Protective coating layer according to one or more of the preceding claims, characterized in that it is laid with a layer thickness of 1-10 mm, preferably 2-5 mm.
SE8203897A 1982-06-23 1982-06-23 PROTECTIVE LAYER INCLUDING GYPS, CEMENT AND ETHYL HYDROXICELLULOSA SE455308B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE8203897A SE455308B (en) 1982-06-23 1982-06-23 PROTECTIVE LAYER INCLUDING GYPS, CEMENT AND ETHYL HYDROXICELLULOSA
DK267083A DK158742C (en) 1982-06-23 1983-06-10 PROTECTIVE SURFACE LAYER
FI832297A FI71334C (en) 1982-06-23 1983-06-22 SKYDDANDE BELAEGGNINGSSKIKT
NO832259A NO156207C (en) 1982-06-23 1983-06-22 PROTECTIVE COATING LAYER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8203897A SE455308B (en) 1982-06-23 1982-06-23 PROTECTIVE LAYER INCLUDING GYPS, CEMENT AND ETHYL HYDROXICELLULOSA

Publications (3)

Publication Number Publication Date
SE8203897D0 SE8203897D0 (en) 1982-06-23
SE8203897L SE8203897L (en) 1983-12-24
SE455308B true SE455308B (en) 1988-07-04

Family

ID=20347162

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8203897A SE455308B (en) 1982-06-23 1982-06-23 PROTECTIVE LAYER INCLUDING GYPS, CEMENT AND ETHYL HYDROXICELLULOSA

Country Status (4)

Country Link
DK (1) DK158742C (en)
FI (1) FI71334C (en)
NO (1) NO156207C (en)
SE (1) SE455308B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015886A1 (en) * 1993-01-13 1994-07-21 Nachtman Thomas J Sprayable composition and method for forming a foamed outdoor protective cover layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015886A1 (en) * 1993-01-13 1994-07-21 Nachtman Thomas J Sprayable composition and method for forming a foamed outdoor protective cover layer

Also Published As

Publication number Publication date
DK267083D0 (en) 1983-06-10
FI832297A0 (en) 1983-06-22
SE8203897D0 (en) 1982-06-23
DK267083A (en) 1983-12-24
NO156207C (en) 1987-08-12
DK158742C (en) 1990-12-03
NO156207B (en) 1987-05-04
DK158742B (en) 1990-07-09
NO832259L (en) 1983-12-27
FI71334C (en) 1986-12-19
FI71334B (en) 1986-09-09
FI832297L (en) 1983-12-24
SE8203897L (en) 1983-12-24

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