LU87511A1 - METHOD FOR PRODUCING POWDER-SHAPED CONCRETE AND PAINT SEALING SURCHARGE - Google Patents

Description

- Q Ί 1¾ 1 i GRAND-DUCHÉ DE LUXEMBOURG

Brevet N ° ....... Q ....... L · ........ sü ............... * ....

Monsieur le Ministre du ............... —— ............................ ïüaxi D'Economie et des Classes Moyennes rp. ,, zguS | Service de la Propriété Intellectuelle liter elivre .................-......................... .- Igg). LUXEMBOURG i

Demande de Brevet d’invention --J -: ----- (1) I. Requête

Energiagazdàlkodàsi ....... Intézet, Bern ...... rkp * ........ 33 * H-Budapest.IXet (2)

Kefflim. "Epit.8a ^ ..... 9 f H-Budapest VII______ représentées par Monsieur Jean Waxweiler, 55 rue des Bruyères, Howaid / agissant en qualité de mandataire (3) dépose (nt) ce ..trois ... .... may ...... rail ...... ne.uf ..... c.ent ....... qu.atre ~ Y.in.g.tr-neuf. ........................... .................. (4) à. ..... 15 * 00 ...... heures, au Ministère de l'Économie et des Classes Moyennes, à Luxembourg: 1. la présente requête pour l'obtention d'un brevet d'invention concernant:

Process for the production of powdered concrete and painter's ^ ................... ..................... ..................

2. la description en langue ............................................ ...................... de l'invention en trois exemplaires; 3 .......................... / ...................... ................... planches de dessin, en trois exemplaires; 4. la quittance des taxes versées au Bureau de l’Enregistrement à Luxembourg, le ............. Q.3.0 5.19 89_________________; 5. la délégation de pouvoir, datée de ......................................... .................................................. ................ le ................................. ................................; 6. le document d’ayant cause (authorization); déclare (nt) en assumant la responsabilité de cette déclaration, que l ’(es) inventeurfe) est (sont):. (6) KAVASSY MLklôs, TusnâdL u. 22 / b, H-Bi * 3apeèt XXIj KDN TiVadàr, Rsrepesi u.

I28-13Ö, ..... g-Éûicl ^ ..... Saigitarj ^ n, .....

Ybl * m.ü.51, H- ^ gétâë ^ àn; WÜëïMi Bârï ^ ---------------- ·; ----------------------------- -------------------------------------------- revendique (nt) pour la susdite demande de brevet la priorité d'une (des) demande (s) de (7) _________________________ / _______________________________________________ déposée (s) en (8) _____ i_________________________________________________________ le (9) JL --------- ----- -------------------------------------------------- -------------------------------------------------- ------------------------------------------------- sous le N ° (10) ______________________________________________________________________________________________________________________________________________________________________________ au nom de (11) ____________________________________________________________________________________________________________________________________________________________________________ 'élit (élisent) domicile pour lui (elle) et, si désigné, pour son mandataire, à Luxembourg________ __________________________ 55 rue..jdes ~ Bruyèrea ^ .... HoiMald ------------------------------------ -------------------------------------------------- ------------------------------------- (12) soHicite (nt) la délivrance d'un brevet d'inventionpour l'objet décrit et représenté dans les annexes susmentionnées, avec ajournement de cette délivrap: é à ------- / .... / --------------- -------------------------------------------------- -------------------------------------------------- ------------------- mois. (13)

Le dl ^ Sîf / mandataire: __________________.... -------------------------------------- -------------------------------------------------- -------------------------------------------------- --- (14) Π. Procès-verbal de Dépôt

La susdite demande de brevet d'invention a été déposée au Ministère de l'Économie et des Classes Moyennes, Service de la Propriété Intellectuelle à Luxembourg, en date du: 03 * 05 * 1989 i * LrifcX J- y j & y 'V' \ /> \ Pr. Le Ministre de l'Economie et des Classes Moyennes, à ....... ÎEÆ ..... heures \\ pd

I 1 2 b Le chef du service de la propriété intellectuelle, A 68007 \ 'A. .-Λ * / -3 - r-, ν · "- EXPLICATIONS RELATIVES AU FORMULAIRECEjISEPÖT ^ (1) s'il ya lieu" Demande de certificat d'additiotinu brevet pnaariàl, à la demande de brevet principal No ... ......... du ............- (2) inscrire les nom, prénom, profession, adresse du demandeur, lorsque celui-ci est un particulier otnés dénomination sociale, formme juridique, address du siège social, lorsque le demandeur est une personne morale - (3) inscrire les nom, prénom, address du mandataire agrée, conseil en propriété industrial, muni d'un pouvoir spécial, s'il ya lieu: “représenté par ............ agissant en qualité de mandataire ”r _ /. ,> - (4) date de dépôt en toutes lettres - (S) titre de l'invention - (6) inscrire les noms, prénoms, adresses des inventeurs ou l'indication "(voir) désignation séparée (suivra)”, lorsque la dési- f) U ~ anation se fait ou se fera dans un document séparé, ou encore l'indication "ne pas mentionner”, lorsque l'inventeur signe ou signera un document de non-mention à joindre à une désignation L-3372

DESCRIPTION

FOR A PATENT APPLICATION IN

GRAND DUCHY OF LUXEMBOURG

Energiagazdâlkodàsi Intézet Bern rkp. 33 H-Budapest II

Kemikàl Epitöanyagipari Vàllalat Kazinczy 9 H-Budapest VII

Process for the production of powdery concrete and painter waterproofing surcharge Λ r t t

Process for the production of powdery concrete and painter waterproofing surcharges

The invention relates to a process for the production of a product (an admixture), sealing the pores, increasing the watertightness of the concrete or the painter, with the use of industrial by-products, silica powder or fluorocarbon silicic acid and / or with the use of the powdered slaked lime.

In the building industry, especially in the field of hydraulic engineering or civil engineering, the demand for waterproof concrete and reinforced concrete structures is increasing. The watertightness of the building structures is primarily identified by their own tightness and their own void content. The prerequisite for tightness is the admixture of strict, uniform grain division, the low water content, and the cement paste-saturated or supersaturated composition. In solidified concrete and painter, there is still so much pore content, even in the case of an ideal batch composition, that the sum of the cubic contents is created because of the workability, then removed open water, because of the inevitably mixed air, and because of the imperfection of the compression.

Water that has reached the surface of the structure penetrates into the pores through the capillary suction action and / or through other pressure gradients, saturates the structure and exits on the other side.

A 4468-2047 KK

ϊ, - 2 -

When creating waterproof concrete, our goal is that less and less moisture should seep through the concrete, so much can evaporate on the opposite side.

The waterproofing of the concrete is characterized by the value of such water pressure expressed in bar, on the 24-hour effect of which no moisture can be seen on the area under investigation during the test carried out according to MSZ 4715 (according to Hungarian standards), and the water penetrates one third of the thickness of the standardized concrete test specimen.

On this basis, the waterproof concretes are divided into 4 groups according to the Hungarian standard 4719 (MSZ 4719):

The sign of the applied water pressure of waterproof concrete according to MSZ 4715 vz 1 0.1 MPa (1 bar) vz 2 0.2 MPa (2 bar) vz 3 0.4 MPa (4 bar) vz 4 0.8 MPa (8 bar)

The practical assessment of the watertightness of a manufactured concrete construction differs from the above, and in the case of significant large process water pressures, the structure with watertightness, e.g. the water, can be removed over time. That is why the waterproofness classification of the concrete structures is characterized by the water quantity, seeping through 1 square meter for 24 hours at the greatest process water pressure, therefore a structure can be as follows: moderately waterproof max. 0.4 L / m2 x day waterproof max. 0.2 L / m2 x day extremely waterproof max. 0.1 L / m2 x day - 3 -

There are two ways to increase the watertightness of concrete and mortar constructions with cement binders: - The application of a waterproof coating layer from the direction of attack of the water, the disadvantage of which is the significant additional expenditure and additional work, and in the case of mechanical or corrosive damage to the coating, the below existing structure no longer remains watertight.

The modification of the composition of the concrete or mortar with the addition of the sealing aggregate, which makes this impermeable in the full cross-section of the structure, i.e. if the surface is damaged, the structure remains watertight.

From the above two methods, the use of the admixtures is equally more advantageous in technical and economic terms.

The admixtures - as defined by the MI. (Technical principles no.G4560-82 - are such liquid powdery (more rarely slurry-like products, which when stirring the fresh concrete, or possibly during their transport or subsequently in the prescribed - compared to the other components in a generally small - mass in the mixing device be loaded so that the individual properties of the fresh and / or solid concrete are made more advantageous, or so that the hardening process is influenced appropriately.

The watertightness of the concrete or mortar can also improve with the use of such plasticizers and plasticizers, suitable for water savings, because the capillary pore volume is reduced by the reduction in the unnecessary quantity of hydration not required for hydration. But this is only a side effect of the above agent.

i - 4 -

The sealing admixtures (with the symbol T) narrow or seal the capillary cavities of the concrete or mortar, or they make the pore walls watertight, which reduces the water absorption, the mass of the leakage, the penetration of the pressurized water. The waterproofing agents, which have a plasticizer side effect, can be used in this way with the reduction in the amount of open water not necessary for cement hydration to produce a more porous, less porous structure, increased impermeability increasing effect.

Means of very different wording are proposed for the use of fillers. Part of it has a plasticizer effect, these work by reducing the W / Z factor. Another part is a fine mineral ground product that reduces the porosity by yellowing. Other types swell up excited by the water, blocking the further way of the water. Hydrophobic materials are also used which reduce the water absorption of the concrete.

The most important types of active ingredients: - Materials that reduce water penetration fine-broth inert substances, (concrete), fine-broth substances of hydraulic properties (trass, fly ash), materials with plasticizer effect (lignin sulfonate salts, water-soluble and water-dispersed polymers), air-cavity-forming materials (neutralized Tree resins) - Hydrophobic materials

Metal soap (sulfate salts, esters of fatty acids, oleate and stearic acid secondary products), butile stearate, petroleum secondary products, mineral oils, asphalts derived from distillation) - materials with mixed effects

Wax emulsions, naphthalene derived products, coal tar, sodium silicate, aluminum powder, hydrogen fluoride and silicon fluoride salts, hydrolysed proteins.

- 5 -

The mode of action of different types of funds differs from one another.

The reduction in water absorption and water permeability of the concrete can - due to the reduction in the amount of capillary voids - due to the narrowing and sealing of the capillary pores - result in a hydrophobic change in the capillary pores.

The reduction in the amount of capillary pores can be achieved primarily with the use of the plasticizer effect, as an event of the reduced water-cement factor, or the cement paste content.

The capillaries can be broken off using air void means. The artificially inserted, blocked air bubbles prevent the water from penetrating into the capillary system (this does not prevent the water penetration that occurs under pressure.) The reduction in WÖZ factor achieved by the plasticizers can also lead to the setting of the connection of the capillary system.

The narrowing or the sealing of the pores can be achieved with the addition of flour-fine mineral pulp product, which is stimulated by the water to swell to its own multiple volume or has mineral properties. The latter, in reaction with the lime released during the hydration of the cement, form calcium hydrosilicate gel, and the large volume gel plugs the capillaries. The use of the ground products is only advisable for concretes with a relatively low cement and fine particle content. In the case of large cement contents, this solution can increase the water demand of the mixture.

- 6 -

The change in the capillary system, hydrophobic, will occur with the addition of hydrophobic agents which increase the tension occurring between the cavity walls. According to the literature, this effect decreases with time in the porosity function of the concrete.

The new admixtures are generally combined.

In addition to waterproofness, the entered sealants also influence other physical-mechanical properties of the concrete.

In general - apart from plasticizers - they reduce the compressive strength of the concrete. This added effect must be taken into account when using admixtures.

According to the Technische Zweiggrundsät e (MI 04.560-82), the average is still appropriate if it results in a maximum reduction in compressive strength of 5%. In addition to the compressive strength, the adhesive strength and the tensile strength also generally decrease. Some of the funds also inhibit water transport, which is necessary for the undisturbed hydration of the cement, and they are therefore delays in imaging. In the case of a plasticizer side effect, this can be compensated for by the reduction in the W / Z factor, in other cases it must be combined with a hardening accelerator or taken into account when stripping. In some cases, the shrinkage of the concrete increases, but only within the permitted range when using concrete admixtures according to the principle mentioned above.

According to the method of this invention, the production of such sealing admixture enables the cheap by-products to be used as raw materials, which have an increasing water-tightness effect even in the case of small admixing quantities.

Dosage mass ratio of the powder mixture components is as follows:

Silica powder 40-60 mass%

Dried out calcium fluoride-silica 10-35 mass%

Powdered slaked lime 25-40 mass%

The product, produced with the method according to the invention, is added to the mixture when the dry raw materials of the concrete or painter are mixed together in 3-6%, the binder material mass of the cement, and then the wet mixing is carried out with the calculated water quantity.

The product hardens the coexistence of the mortar or concrete mix a little, which allows a 5-8 percent reduction in water addition. The cavity content, the binding time and the body density are not affected. In relation to the strength values of the calibration mixtures (exempt from the addition of the same composition), the strength of the mixtures with admixtures, especially the measured value, increased in 91 days (+50 - .. + 110%). This proves that the product participates in hydration, especially in the post-hardening period. The linear shrinkage of the concretes mixed with this product is uniform in comparison with the gauge, or of lesser value. In the course of the standardized water tightness test, the test specimens containing this product have proven to be watertight at 8 bar water pressure in relation to the gauge, which is completely watered down after the 1 bar pressure level. The mixing of the product does not interfere with the steam hardening of the prefabricated concrete elements and it does not contain any steel corrosion dangerous chloridion.

A B

- 9 -

The concrete technological effect of the product according to this invention is shown in comparison with the calibration measure freed from this admixture in the following tables:

Test results of the fresh concrete according to MSZ 4714

Sign sealant, flow pore body of the manufactured with bar ~ 'content: .dense ton- to this method rVolum.

mix. Cement masses% Cm Vol.% Kg / m3 TO - 53 2.7 2.354 TI 5 54 3.6 2.351 T2 10 50 4.5 2.314 T3 10 48 4.6 2.303

Test results of the compressive strength according to MSZ 4715

Sign of compressive strength on a 15th

Concrete Cm large square (15N / mm2) 7 days 28 days 91 days old old old TO 5.2 13.1 16.9 TL 9.6 17.3 23.7 T2 8.8 21.1 27.4 T3 20 , 3 31.4 35.9

Water resistance test results according to MSZ 4715

Sign of water absorption Max. One water

Concrete plus pressure level tightness mixture deep level (ML) (MM) <* - 10 - 48h 24h 24h 48h lBar 2Bar 4Bar 8Bar T0 750 1700 - 120 -

XXXX XXX

Tl 6 9 12 21 22 vz 8 T2 42 87 110 170 71 vz 2 T3 8 17 31 43 25 vz 8

Note: xxx At 2 bar pressure values, it was gradually moistened.

Linear incoming values according to MSZ 4715

Linear Incoming Sign (MM / M)

Mixing concrete 8 days 14 d. 28 d. 56 T. 91 T.

TO 0.058 0.116 0.252 0.349 0.388 TI 0.034 0.088 0.219 0.325 0.393 T2 0.107 0.179 0.398 0.461 0.495 T3 0.054 0.152 0.267 0.344 0.388

Note: The basic composition of the investigated concretes is as follows: 350 KSPC 20 cement from Vac 300 KG / m3 sandy gravel admixture 1800 KG / m3

Water additive 210 L / m3

Exemplary embodiments: 1st example

Concrete and painter waterproofing admixtures are manufactured. The aggregate materials are mixed together in the following mass percentage in the powder mixer. Silica powder 53 mass%

Calcium fluoride

Silica powder 14 mass% - 11 - * »* '% ·

Powdered slaked lime 33 masses ^ 3 mass% from the powder mixture is fed for the production of waterproof concrete with a 5 mass percent reduction in the amount of stirring water.

2nd example

The product is mixed together in a mass mixer different from the first example, where silica powder 44 mass%

Calcium fluoride silica powder 26 mass%

Powdered slaked lime 30 mass% are charged in the above proportions. The powder mixture is used to add 6 percent to the weight of the waterproof cement mortar, while reducing the planned agitation water by 8 percent by mass.

Claims (1)

4, - 12 -patent claim Process for the production of powdery admixture of concrete or a waterproofing effect (waterproofness corrective effect) with the use of silica powder, calcium fluoride-silica sludge and powdered lime, characterized in that the calcium fluoride-silica sludge is expediently pulverized by vacuum distillation. then it is crushed to a cement-fine dry powder, and then from 40-60 mass percent silica powder, from 10-35 mass percent calcium fluoride-silica powder and from 25-40 mass percent powdered lime, a uniform pale gray powder product is produced, which Mix the dry basic materials of the concrete or mortar in 3-6% of the binding material of the cement, before adding the moist machine stirring.