CA1068308A - High temperature resistant concrete and manufacturing process - Google Patents

Abstract

A concrete resistant to high temperatures to allow its enameling. Concrete is obtained by cold mixing Portland cement, silica, another silica-based substance and a flux, such as sprayed glass with the addition of water, molding and normal setting. The concrete, once hardened, is covered with an enamel or other coating melting at high temperature and heated to a high temperature from 700.degree.C to 1500.degree.C, in order to cause melting and spreading of the 'E-mail. The concrete is then cooled. The presence of silica and the other silica-based substance causes the formation of insoluble, anhydrous calcium silicate upon heating. The presence of the flux removes the pores remaining in the cement and helps the melting and spreading of the enamel during heating. In the product obtained, the enamel is uniformly distributed over the entire surface of the block or of the peton board.

Description

`` `iQ68308 The pr ~ snte invention relates to ~ bloc8 or panel ~ of b ~ ton covered with é ~ garlic or all ~ reve- ~ ement ~ undulating ~ high ~
t ~ p ~ rature.
The pre ~ ente invention also relates to a proc ~ d ~ for obtaining the above-mentioned blocks and panels.
Da ~ la de ~ nde AU Ca ~ ada de ~ po ~ e 9 April 8, 1974, under the number 197,364, entitled "PROCEDE DE F ~ R ~ ATION DE A B ~ TON ~ NHYDR $ ~, by the ~ e i2venteur, we d ~ crlt a b ~ tone which can be heated ~ A
High tears without erosion. This b ~ your pcut therefore be covered of a garlic. This concrete is composed ~ plu8 particularly of PortlaDd cement, of ~ illce and sodlum or pota3sium sillcate. It was found that this bSton still contains dec porss and has a slightly rough surface ~ which - It prevents the uniform spreading of the enamel during cooking.
According to the pr ~ esto invention, it has been found that by having a melting at the co ~ aforementioned position ~ i'm helping great ~ ent ~ the font and the uniform element of the super ~ icid mail.
According to the pr ~ ente i ~ vention ~ we proceed from the following raQon ~;
; Portland cement is mixed with ailice and a sillcate dlun ~ tal aloslln a ~ nsi that a background ~ avee a qusntity of water ~ ppropriée.
The dough thus obtained is placed in a mold. Once the first ; b6 ~ on compl ~ tée, the bloo or the panel is covered with a reretem ~ nt .: fondant at high t ~ peraturo ~ such as ~ a 6mailJ and the ~ block ~ or breakdownQu ~
Have been around 6s in one round at a temperature between 700 C ot 1500C and ~ do preférenco to wrap around 1120C ~ of ta ~ on to liquefy the ~ nail qul then spreads over the surface of blocks or pannels leaves ~ nsuite to cool the blocks or panel ~ sil duro ~ covers the blocks or panel ~ of a ~ absolutely uniform lesson.
The percentages by weight of ~ diver ~ i ~ gredients can vary slightly coD ~ ideal ~ ents Portland cement between 10 ~ and 6q ~; silica enters 10 ~ and 60 ~; silicate of ~ odiu ~ or potassium between 4 ~ and ~ q ~; and the ~ undulating between 7 ~ and 70 ~. ~ e ~ fondants used ~ 80 ~ ~ 4 ~ from

- 2 - ~

6l ~ 308 the following ingredients lo le ~ taphosphate d ~ c ~ lcium Ca (P3) 2 dqs rrittos or glass ~ abrupt wavy ~ m ~ n ~ pulsed chilled ~ ine ~ olt pulv ~ ri ~ 6 3O glass powder ~ eo ac ~ mplc3 following have de8 OE ~ aples pr ~ sheave. It ~ t heard that a great number of other co ~ po itions little ~ ent be very useful in le8 li ~ ites Dlentiol ~ born above do ~.
- 1 ~ ~ E
- 10 ~ e ~ éla ~ gc ~ ulvant has been prepared ~ par6s H61ango ~ grsnulo ~ trie (msill ~ de ta ~ is poid ~ en pourcsntage per inch arrfi) li ~ roY by weight ailico 16 7 9.5 ailice 24 7 9.5 ~ ilice 4 ~ 20 27-3 sllic ~ 200 10 13.6 ~ 59.9 ¢ i ~ ent Portland 15 20.4 silloato de ~ odium on poudro 7 9-5 . 20 ~ wanders in powder 7.5 10.2 Total lb ~ 73.5 lOO.
Ie ~ filange obtonu a ~ té additlonn6 d ~ aau en quantlt ~ au ~
~ anto for for ~ er uno pât- qul, a kings mold ~ e in de ~ noule3 for for ~ r ds blocks ~ t of ~ psnnesus, a ~ t ~ lsiJ ~ é ~ ~ u repos ~ u3qu ~ conplè-t ~ do not take concrete IB ~ urr ~ co dos bloos or pannesu ~ a étb ensuito reopening of a ~ nail do the corridor of ~ sir ~ - ~ es blocks thus covered of a ~ 2ail were placed in an oven and heated ~ s to uno te ~ p ~ rsture do 1120C for liqu ~ fior ll ~ msil After cool down the blocks and pan neaus ~ e had no disaggregation and the msil covered the aurface fs ~ on conpl ~ tement unlfor ~ e.
The following mixtures3 have been prepared and heated.

106 ~ 08 f ~ s ~ de ~ t ~ mp ~ rature3 varisn ~ eD ~ re 700 and 1500C using the ~ method described in lle ~ s ~ ple I ~
N ~ lan ~ e B
8ilics, granulom ~ sorting ~ ranging between 6 and 2G0 2 ~ by weight Portland cement 2q ~
potassium silicate 2 ¢ alclu metaphosphate ~ ~ 0 swaddle C
; ~ 10 sillce 15% by weight `: ci ~ ent Portland 25%
delicate potasoiu ~ 10 v ~ rro on powder 5 lOC ~

8111 ¢ ~ ~ o%
oi ~ nG Portla ~ d 6q ~
~ ilicate do oodiu ~ 4%
~ colored frit æ%
,; ~ o 100 N ~ lang ~
8ilico 40% on weight ~
oi ~ ent Portland l sodiu sili ~ 20 ~ powdered orre 3 lOC ~
In all ~ CB8 ~ lo p ~ oduit obte ~ u 6v ~ it ~ ubstsntielle ~ ent the ~ es caraot ~ rlstiques that 19 produces llex ~ ple I.

'' :

Claims (7)

THE ACHIEVEMENTS OF THE INVENTION ABOUT WHICH A RIGHT
EXCLUSIVE OF OWNERSHIP OR PRIVILEGE IS CLAIMED, ARE
DEFINED AS FOLLOWS: 1. As a building material, a molded mas obtained by heating to a temperature between 700 ° C and 1500 ° C, a molded and hardened mixture containing in percentage by weight 10% to 60%
Portland cement, 10% to 60% silica,?% to 20% silicate of a alkali metal and from 7% to 70% of a flux. 2. The product as defined in claim 1, in which the fondant is chosen from:
a) sprayed glass b) calcium metaphosphate. 3. The product as defined in claim 1, in which at least one of the faces of the molded mass is covered a coating melting at said chaffe temperature. 4. The product as defined in the claim 1, in which the silica is a mixture of silica powder of different grain sizes varying between 6 and 200 mesh screens square inch. 5. A process for manufacturing a block or panel used as a building material, comprising the mixture of Portland cement in quantities varying between 10% and 60%, silica in an amount varying between 10% and 60%, sodium silicate or potassium in an amount varying between 4% and 20% and a flux in quantity varying between 7% and 70%, all of these ingredients being sprayed and the percentages being by weight, and water to form a paste, molding this dough in a mold to form a molded mass, the rest of said mixture until there is concrete setting, the appli-cation of a coating melting at high temperature on at least one of the faces of the molded mass and the heating of said mass molded at a temperature varying between 700 ° C and 1500 ° C for cast iron and coating spreading and mass cooling for get the final product. 6. The method defined in claim 5, in which the fondant is chosen from a) calcium metaphosphate b) frits c) powdered glass 7. A method as defined in claim 6, in which the silica consists of a mixture of silica of different grain size rents passing through a sieve whose number of mesh per square inch ranges from 6 to 200.