CA2145738A1 - Binder for hydraulically setting self-levelling floor screeds - Google Patents
Binder for hydraulically setting self-levelling floor screedsInfo
- Publication number
- CA2145738A1 CA2145738A1 CA 2145738 CA2145738A CA2145738A1 CA 2145738 A1 CA2145738 A1 CA 2145738A1 CA 2145738 CA2145738 CA 2145738 CA 2145738 A CA2145738 A CA 2145738A CA 2145738 A1 CA2145738 A1 CA 2145738A1
- Authority
- CA
- Canada
- Prior art keywords
- calcium sulphate
- weight
- binder
- binder according
- days
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- 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
- C04B2111/60—Flooring materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Floor Finish (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Soil Working Implements (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Working-Up Tar And Pitch (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to a binder for hydraulically setting self-levelling floor screeds or industrial floors com-prising a mixture of calcium sulphate and slag sand, in which reactive aluminates, calculated as CA, which can if desired be partially replaced by calcium hydroxide, are present, with the mixture in the three-material diagram calcium sulphate/slag sand/reactive aluminate being made up within a window which extends along the calcium sulphate - slag sand axis from 35 to 70% by weight of calcium sulphate, calculated as CaSO4, and in the direction of reactive aluminates from about 0.5 to 5% by weight, in such a way that a standard mortar prism comprising a mixture of three parts by weight of quartz sand and one part by weight of a binder at an age of 28 days, 21 days of which is storage at 20°C and 65%
relative atmospheric humidity, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.
relative atmospheric humidity, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.
Description
214~738 Binder for hydraulically setting self-levelling floor screeds The invention relates to a binder for hydrauli-cally setting self-levelling floor screeds comprising a mixture of calcium sulphate and slag sand.
DE-C 38 43 635 discloses the use for self-levelling floor screeds of a binder comprising calcium sulphate alpha-hemihydrate and flour-like slag sand in a ratio of from 90:10 to 70:30, if desired together with ayy eyates and additives. The calcium sulphate alpha-hemihydrate here has a favourable influence on the initial strength. Such slurry screeds generally possess, as a result of the high proportion of calcium sulphate, a sufficiently low shrinkage on drying and final setting and a sufficient surface strength, with the latter becoming poorer with increasing slag sand contents, for which reason its content is restricted to the prescribed range. This thus leads to a very high usage of calcium sulphate alpha-hemihydrate which is a product which is relatively complicated to produce and thus expensive.
A screed based on slag sand would be, owing to its long reaction time, extremely sensitive to drying out and would run the risk of suffering from lack of mois-ture. Rewatering would counteract this, but is inconvenient and thus undesired. In addition, strength and surface problems occur which are caused by insufficient reaction of slag sand. Even amounts of up to 30% by weight of calcium sulphate hemihydrate, which does give a more favourable initial ~trength, reduce only the sensitivity to drying out, but do not eliminate this or the surface problems resulting from early carbonation.
It is known that, in sulphate slag cement in accordance with 2IN 4210 (1954), which has long been no longer available and contained, apart from slag sand and calcium sulphate, up to about 2.5% by weight of Portland cement clinker, the problem of the insufficient surface strength does not exist, but the Portland cement clinker here impairs the shrinkage behaviour resultiDg in form-ation of cracks which have been accepted in concrete but are not tolerable in a screed.
*) the German standard -A screed based on calcium sulphate and a Portland cement or Portland cement clinker is low in shrinkage and, with rising Portland cement content, tends to blow if the screed becomes wet. Thus, a correspQn~;ng screed is sensitive to aqueous base coats or primers as are used nowadays in place of those which contain organic liquids as solvent. To counter this problem, according to exactly the abovementioned DE-C 38 43 625, slag sand is used in place of the Portland cement or its clinker, 80 as to make the screed water-resistant and insensitive to blowing.
It is an object of the invention to provide a binder which makes possible the production of hydraulically setting self-levelling floor screeds i which have, with a reduced proportion of calcium sulphate, a sufficient surface strength.
This object is achieved by reactive aluminates, calculated as CA, which can if desired be partially replaced by calcium hydroxide, being present in addition to calcium sulphate and slag sand, with the mixture in the three-material diagram calcium sulphate/slag sand/reactive aluminate being made up within a window which extends along the calcium sulphate - slag sand axis from 35 to 70% by weight of calcium sulphate, calculated as CaS04, and in the direction of reactive aluminates from about 0.5 to 5% by weight, in such a way that a st~n~rd mortar prism comprising a mixture of three parts by weight of quartz sand and one part by weight of a binder at an age of 28 days, 21 days of which is storage at 20C and 65% relative atmospheric humidity after previous moist or water storage, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.
This makes it possible to produce water-resistant self-levelling screeds which are suitable even for industrial floors and which have a high in-i~ial strength, sufficient ~urface strength with high final compressive strength and a shrinkage on drying and final setting which is 80 small that no tearing or dishing results.
The st~n~rd mortar prisms are produced in ~` 214S73~
accordance with the European St~n~rd EN 196 Part 1 which i8 applicable to cement, using a ratio of water to binder of about 0.46. The measurement of the shrinkage is carried out on the st~n~rd mortar prisms in accordance with the directions of EN 196 at an age of 28 days with initial moist storage for two days and subsequent water storage for five days.
Furthermore, the formulation is advantageously made up within the window of the three-material diagram in such a way that swelling on water storage for 26 days, (after prior moist storage for two days) is at most 1 mm/m, in particular 0.5 mm!m.
The reactive aluminates can be present, in particular, in the form of C12A7 and/or C3A which have an excess of CaO and thus, in the reaction in the fresh mortar, on the one hand eliminate calcium hydroxide and, on the other hand, increase the surface strength by formation of aluminate hydration products. The Ca(OH) 2 which is eliminated serves as a buffer against early carbonation of the fresh mortar on the screed surface.
The reactive aluminates can, however, also be present in the form of CA or C~AF, with a part of the reactive aluminates being able to be replaced by calcium hydroxide.
The proportion of the reactive aluminates is preferably below 2.5% by weight.
The reactive aluminates can, together with reactive silicates such as C2S and C3S, be present, for instance, in the form of aluminous or fused aluminous cement, Portland cement clinker or Portland cement, iron Portland cement or blast furnace slag cement or mixtures thereof.
The individual components are milled separately and subsequently mixed. Here, the individual components should preferably have a Blaine specific surface area of at least 3000 cm~/g.
Suitable forms of calcium sulphate, which posi-tively influences virtually only theinitialstrength, are CaSO~.xH20 in general and also mixtures of various calcium -sulphates, i.e. it is possible to use, for example, calcium sulphate beta-hemihydrate but also, and indeed in particular, hard plaster having a water requirement of ~ 0.4 such as calcium sulphate alpha-hemihydrate or anhyrite-II or anhydrite-III, if desired as a mixture, with the use of calcium sulphate alpha-hemihydrate being particularly preferred. The calcium sulphate can be used in finely milled or powder $orm. Particularly for use in travelling mixers, it i8 also possible to use moist FGD
gypsum (flue gas desulphurization gypsum) which is then to be m;Ye~ in during the production of the fresh mortar.
The same applies to returned material from travelling mixers which has been freed of ayy~eyate.
Suitable ayy~eyates are, for example, quartz sands, gra~els, chippings or other quartz-cont~;n;ng materials. Furthermore, additives such as stone flours and fly ashes can be added.
In addition, it is possible to add activators, in particular for the slag sand, e.g. chloride, retarders, accelerators, stabilizers and flow improvers.
Several binder compositions and the shrinkage and swelling values of st~n~d mortar prisms prepared therefrom and having an age of 28 days are given below.
Calcium Slag Reactive Calcium Other Water~ Shrinkage Swell-aulphate sand aluminate- hydro- wt. % binder ,/m ing alpha- wt.% cont~i ni ~g xide mm/m hemi- ~.~po tion wt.%
hydrat- wt. %
wt. %
42.7 6.8~ 0.5 0.47 0.128 0.859 46.4 3.4* 0.25 0.47 0.133 0.288 41.7 38.6 2.9 16.9* 0.46 0.16 0.288 63 2**~ ~ 0.45 0.096 0.263 34.6 62.4 3**~ 0.46 0.032 0.175 * Portland cement cl;n~r ** 16.7% by weight of bituminou~ coal fly ash + O.2% by w-ight of other material *** Al~minou~ cement **** 2% by weight of al~m;nou~ com-nt + 1% by w-ight of calcium hydL~'de
DE-C 38 43 635 discloses the use for self-levelling floor screeds of a binder comprising calcium sulphate alpha-hemihydrate and flour-like slag sand in a ratio of from 90:10 to 70:30, if desired together with ayy eyates and additives. The calcium sulphate alpha-hemihydrate here has a favourable influence on the initial strength. Such slurry screeds generally possess, as a result of the high proportion of calcium sulphate, a sufficiently low shrinkage on drying and final setting and a sufficient surface strength, with the latter becoming poorer with increasing slag sand contents, for which reason its content is restricted to the prescribed range. This thus leads to a very high usage of calcium sulphate alpha-hemihydrate which is a product which is relatively complicated to produce and thus expensive.
A screed based on slag sand would be, owing to its long reaction time, extremely sensitive to drying out and would run the risk of suffering from lack of mois-ture. Rewatering would counteract this, but is inconvenient and thus undesired. In addition, strength and surface problems occur which are caused by insufficient reaction of slag sand. Even amounts of up to 30% by weight of calcium sulphate hemihydrate, which does give a more favourable initial ~trength, reduce only the sensitivity to drying out, but do not eliminate this or the surface problems resulting from early carbonation.
It is known that, in sulphate slag cement in accordance with 2IN 4210 (1954), which has long been no longer available and contained, apart from slag sand and calcium sulphate, up to about 2.5% by weight of Portland cement clinker, the problem of the insufficient surface strength does not exist, but the Portland cement clinker here impairs the shrinkage behaviour resultiDg in form-ation of cracks which have been accepted in concrete but are not tolerable in a screed.
*) the German standard -A screed based on calcium sulphate and a Portland cement or Portland cement clinker is low in shrinkage and, with rising Portland cement content, tends to blow if the screed becomes wet. Thus, a correspQn~;ng screed is sensitive to aqueous base coats or primers as are used nowadays in place of those which contain organic liquids as solvent. To counter this problem, according to exactly the abovementioned DE-C 38 43 625, slag sand is used in place of the Portland cement or its clinker, 80 as to make the screed water-resistant and insensitive to blowing.
It is an object of the invention to provide a binder which makes possible the production of hydraulically setting self-levelling floor screeds i which have, with a reduced proportion of calcium sulphate, a sufficient surface strength.
This object is achieved by reactive aluminates, calculated as CA, which can if desired be partially replaced by calcium hydroxide, being present in addition to calcium sulphate and slag sand, with the mixture in the three-material diagram calcium sulphate/slag sand/reactive aluminate being made up within a window which extends along the calcium sulphate - slag sand axis from 35 to 70% by weight of calcium sulphate, calculated as CaS04, and in the direction of reactive aluminates from about 0.5 to 5% by weight, in such a way that a st~n~rd mortar prism comprising a mixture of three parts by weight of quartz sand and one part by weight of a binder at an age of 28 days, 21 days of which is storage at 20C and 65% relative atmospheric humidity after previous moist or water storage, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.
This makes it possible to produce water-resistant self-levelling screeds which are suitable even for industrial floors and which have a high in-i~ial strength, sufficient ~urface strength with high final compressive strength and a shrinkage on drying and final setting which is 80 small that no tearing or dishing results.
The st~n~rd mortar prisms are produced in ~` 214S73~
accordance with the European St~n~rd EN 196 Part 1 which i8 applicable to cement, using a ratio of water to binder of about 0.46. The measurement of the shrinkage is carried out on the st~n~rd mortar prisms in accordance with the directions of EN 196 at an age of 28 days with initial moist storage for two days and subsequent water storage for five days.
Furthermore, the formulation is advantageously made up within the window of the three-material diagram in such a way that swelling on water storage for 26 days, (after prior moist storage for two days) is at most 1 mm/m, in particular 0.5 mm!m.
The reactive aluminates can be present, in particular, in the form of C12A7 and/or C3A which have an excess of CaO and thus, in the reaction in the fresh mortar, on the one hand eliminate calcium hydroxide and, on the other hand, increase the surface strength by formation of aluminate hydration products. The Ca(OH) 2 which is eliminated serves as a buffer against early carbonation of the fresh mortar on the screed surface.
The reactive aluminates can, however, also be present in the form of CA or C~AF, with a part of the reactive aluminates being able to be replaced by calcium hydroxide.
The proportion of the reactive aluminates is preferably below 2.5% by weight.
The reactive aluminates can, together with reactive silicates such as C2S and C3S, be present, for instance, in the form of aluminous or fused aluminous cement, Portland cement clinker or Portland cement, iron Portland cement or blast furnace slag cement or mixtures thereof.
The individual components are milled separately and subsequently mixed. Here, the individual components should preferably have a Blaine specific surface area of at least 3000 cm~/g.
Suitable forms of calcium sulphate, which posi-tively influences virtually only theinitialstrength, are CaSO~.xH20 in general and also mixtures of various calcium -sulphates, i.e. it is possible to use, for example, calcium sulphate beta-hemihydrate but also, and indeed in particular, hard plaster having a water requirement of ~ 0.4 such as calcium sulphate alpha-hemihydrate or anhyrite-II or anhydrite-III, if desired as a mixture, with the use of calcium sulphate alpha-hemihydrate being particularly preferred. The calcium sulphate can be used in finely milled or powder $orm. Particularly for use in travelling mixers, it i8 also possible to use moist FGD
gypsum (flue gas desulphurization gypsum) which is then to be m;Ye~ in during the production of the fresh mortar.
The same applies to returned material from travelling mixers which has been freed of ayy~eyate.
Suitable ayy~eyates are, for example, quartz sands, gra~els, chippings or other quartz-cont~;n;ng materials. Furthermore, additives such as stone flours and fly ashes can be added.
In addition, it is possible to add activators, in particular for the slag sand, e.g. chloride, retarders, accelerators, stabilizers and flow improvers.
Several binder compositions and the shrinkage and swelling values of st~n~d mortar prisms prepared therefrom and having an age of 28 days are given below.
Calcium Slag Reactive Calcium Other Water~ Shrinkage Swell-aulphate sand aluminate- hydro- wt. % binder ,/m ing alpha- wt.% cont~i ni ~g xide mm/m hemi- ~.~po tion wt.%
hydrat- wt. %
wt. %
42.7 6.8~ 0.5 0.47 0.128 0.859 46.4 3.4* 0.25 0.47 0.133 0.288 41.7 38.6 2.9 16.9* 0.46 0.16 0.288 63 2**~ ~ 0.45 0.096 0.263 34.6 62.4 3**~ 0.46 0.032 0.175 * Portland cement cl;n~r ** 16.7% by weight of bituminou~ coal fly ash + O.2% by w-ight of other material *** Al~minou~ cement **** 2% by weight of al~m;nou~ com-nt + 1% by w-ight of calcium hydL~'de
Claims (9)
1. Binder for hydraulically setting self-levelling floor screeds comprising a mixture of calcium sulphate and slag sand, characterized in that reactive aluminates, calculated as CA, are present in addition to calcium sulphate and slag sand, with the mixture in the three-material diagram calcium sulphate/slag sand/reactive aluminate being made up within a window which extends along the calcium sulphate - slag sand axis from 35 to 70 % by weight of calcium sulphate, calculated as CaSO4, and in the direction of reactive aluminates from about 0.5 to 5% by weight, in such a way that a standard mortar prism comprising a mixture of three parts by weight of quartz sand and one part by weight of a binder at an age of 28 days, 21 days of which is storage at 20°C and 65%
relative atmospheric humidity after previous moist or water storage, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.
relative atmospheric humidity after previous moist or water storage, has a shrinkage of less than 0.3 mm/m, in particular less than 0.2 mm/m.
2. Binder according to Claim 1, characterized in that the formulation is made up within the window of the three-material diagram in such a way that the swelling on water storage for 26 days after prior moist storage for two days is at most 1 mm/m, in particular 0.5 mm/m.
3. Binder according to Claim 1 or 2, characterized in that the calcium sulphate is a plaster having a water requirement of < 0.4.
4. Binder according to Claim 3, characterized in that the calcium sulphate is calcium sulphate alpha-hemihydrate.
5. Binder according to Claim 1 or 2, characterized in that the calcium sulphate is a flue gas desulphurization gypsum.
6. Binder according to any one of Claims 1 to 5, characterized in that the reactive aluminates are present in an amount of up to 2.5% by weight.
7. Binder according to any one of Claims 1 to 6, characterized in that the reactive aluminates are intro-duced as aluminous cement and/or fused aluminous cement.
8. Binder according to any one of Claims 1 to 7, characterized in that the reactive aluminates are intro-duced as Portland cement and/or Portland cement clinker.
9. Binder according to any one of Claims 1 to 8, characterized in that the reactive aluminates are par-tially replaced by calcium hydroxide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4410850.8 | 1994-03-29 | ||
| DE19944410850 DE4410850C2 (en) | 1994-03-29 | 1994-03-29 | Process for the preparation of a binder for hydraulically setting liquid screeds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2145738A1 true CA2145738A1 (en) | 1995-09-30 |
Family
ID=6514128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2145738 Abandoned CA2145738A1 (en) | 1994-03-29 | 1995-03-28 | Binder for hydraulically setting self-levelling floor screeds |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0675088B1 (en) |
| JP (1) | JPH082950A (en) |
| AT (1) | ATE186287T1 (en) |
| CA (1) | CA2145738A1 (en) |
| CZ (1) | CZ290982B6 (en) |
| DE (2) | DE4410850C2 (en) |
| FI (1) | FI951503A (en) |
| HU (1) | HUT77957A (en) |
| NO (1) | NO951164L (en) |
| PL (1) | PL307885A1 (en) |
| RU (1) | RU95104230A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4434322C2 (en) * | 1993-09-28 | 1999-11-18 | Denki Kagaku Kogyo Kk | Cement admixture and their use in chemically prestressed concrete |
| DE19501100C2 (en) * | 1995-01-16 | 1999-10-21 | Pro Mineral Ges | Shotcrete binder mix |
| DE19612861A1 (en) * | 1995-06-22 | 1997-01-02 | Sicowa Verfahrenstech | Binder for mortar and concrete |
| GB2402671B (en) * | 2003-05-14 | 2006-08-09 | Transmix Group Ltd | Remediation of recycled glass waste |
| WO2007101855A2 (en) * | 2006-03-06 | 2007-09-13 | Akzo Nobel Coatings International B.V. | Method of applying a top layer of a floor |
| JP5407112B2 (en) * | 2007-03-23 | 2014-02-05 | 宇部興産株式会社 | Cement-based solidification material for high pressure injection method and high pressure injection method |
| PL2080742T3 (en) | 2008-01-15 | 2015-05-29 | Heidelbergcement Ag | Sulphate foundry cement |
| DE102012009722B3 (en) * | 2012-05-16 | 2013-08-08 | Quick-Mix Gruppe Gmbh & Co. Kg | Binder mixture and dry mortar composition |
| FR3063999B1 (en) * | 2017-03-16 | 2021-04-30 | Groupe Marais | HYDRAULIC BINDER FOR LOW-CARBON MORTAR AND MORTAR CONTAINING SUCH A HYDRAULIC BINDER |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5499126A (en) * | 1978-01-23 | 1979-08-04 | Asahi Chemical Ind | Self levelling flooring composition |
| JPS54157128A (en) * | 1978-06-01 | 1979-12-11 | Japan Process Eng | Selfflevelling flooring material composition |
| GB2042496B (en) * | 1979-02-28 | 1983-02-09 | Mitsubishi Mining & Cement Co | Process for producing gypsum-based hardened body |
| DE3049003A1 (en) * | 1979-05-04 | 1981-09-10 | Japan Process Engineering Co. Ltd., 107 Tokyo | Hydraulic binder comprising blast furnace slag and calcium sulphate - with alkali(ne earth) cpd. set accelerator and chloride or sulphate as hardener |
| DE2953652C1 (en) * | 1979-05-09 | 1986-05-28 | Japan Process Engineering Co. Ltd., Tokio/Tokyo | Hydraulic inorganic mass |
| GB2077251B (en) * | 1980-06-09 | 1984-03-28 | Masuda Yoshitaka | Slag cement composition |
| KR850000256B1 (en) * | 1984-06-27 | 1985-03-14 | 은희권 | The composition of hydraulic cement |
| DE3527982A1 (en) * | 1985-08-03 | 1987-02-05 | Sicowa Verfahrenstech | Mortar mix for faster-setting cement screeds |
| IN168901B (en) * | 1986-12-09 | 1991-07-06 | Raffaele Cioffi | |
| ES2043958T3 (en) * | 1988-06-24 | 1994-01-01 | Pro Mineral Ges | PROCEDURE FOR THE PREPARATION OF A HYDRAULIC BINDING AGENT THAT SOLVES RAPIDLY AFTER Kneading WITH WATER. |
| DE3843625C3 (en) * | 1988-06-24 | 1998-05-20 | Pro Mineral Ges | Process for the preparation of hydraulic binder mixtures which solidify more quickly after being mixed with water, with adjustable early strength and defined water resistance of the hardened masses produced therefrom |
-
1994
- 1994-03-29 DE DE19944410850 patent/DE4410850C2/en not_active Expired - Fee Related
-
1995
- 1995-02-23 HU HU9500552A patent/HUT77957A/en unknown
- 1995-03-23 AT AT95104256T patent/ATE186287T1/en active
- 1995-03-23 DE DE59507157T patent/DE59507157D1/en not_active Revoked
- 1995-03-23 EP EP19950104256 patent/EP0675088B1/en not_active Revoked
- 1995-03-27 PL PL30788595A patent/PL307885A1/en unknown
- 1995-03-27 CZ CZ1995766A patent/CZ290982B6/en not_active IP Right Cessation
- 1995-03-27 NO NO951164A patent/NO951164L/en unknown
- 1995-03-28 JP JP7069894A patent/JPH082950A/en active Pending
- 1995-03-28 RU RU95104230/03A patent/RU95104230A/en unknown
- 1995-03-28 CA CA 2145738 patent/CA2145738A1/en not_active Abandoned
- 1995-03-29 FI FI951503A patent/FI951503A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HU9500552D0 (en) | 1995-04-28 |
| EP0675088B1 (en) | 1999-11-03 |
| JPH082950A (en) | 1996-01-09 |
| CZ290982B6 (en) | 2002-11-13 |
| HUT77957A (en) | 1998-12-28 |
| FI951503A0 (en) | 1995-03-29 |
| DE4410850A1 (en) | 1995-10-05 |
| EP0675088A2 (en) | 1995-10-04 |
| PL307885A1 (en) | 1995-10-02 |
| EP0675088A3 (en) | 1996-08-21 |
| ATE186287T1 (en) | 1999-11-15 |
| DE59507157D1 (en) | 1999-12-09 |
| DE4410850C2 (en) | 1997-12-11 |
| RU95104230A (en) | 1996-12-20 |
| NO951164L (en) | 1995-10-02 |
| CZ76695A3 (en) | 1995-11-15 |
| FI951503A (en) | 1995-09-30 |
| NO951164D0 (en) | 1995-03-27 |
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |