DE3618478A1 - Pulverulent anti-corrosion agent, preferably for reinforcement steel in concrete - Google Patents
Pulverulent anti-corrosion agent, preferably for reinforcement steel in concreteInfo
- Publication number
- DE3618478A1 DE3618478A1 DE19863618478 DE3618478A DE3618478A1 DE 3618478 A1 DE3618478 A1 DE 3618478A1 DE 19863618478 DE19863618478 DE 19863618478 DE 3618478 A DE3618478 A DE 3618478A DE 3618478 A1 DE3618478 A1 DE 3618478A1
- Authority
- DE
- Germany
- Prior art keywords
- mass
- concrete
- bitumen
- ethylene
- vinyl acetate
- 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.)
- Withdrawn
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 14
- 239000004567 concrete Substances 0.000 title claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 title claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000010426 asphalt Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 5
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 3
- 239000010959 steel Substances 0.000 claims abstract description 3
- 230000007797 corrosion Effects 0.000 claims description 9
- 239000011814 protection agent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 5
- 229920000578 graft copolymer Polymers 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002161 passivation Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000004035 construction material Substances 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 239000011294 coal tar pitch Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
- E04B1/642—Protecting metallic construction elements against corrosion
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/015—Anti-corrosion coatings or treating compositions, e.g. containing waterglass or based on another metal
-
- 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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/61—Corrosion inhibitors
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/26—Corrosion of reinforcement resistance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Wood Science & Technology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Titel der Erfindung
Pulverförmige Korrosionsschutzmittel, vorzugsweise für Bewehrungsstahl
in BetonTitle of the invention
Powdered anti-corrosion agents, preferably for reinforcing steel in concrete
Anwendungsgebiet der Erfindung
Die Erfindung betrifft pulverförmige Korrosionsschutzmittel für
den Schutz von Bewehrungsstahl in Baustoffen und Bauelementen
aus Silikatbeton, die keine dauerhafte Passivierung des Bewehrungsstahls
gewährleisten. Ihre Anwendung ist auch dort möglich,
wo an Korrosionsschutzmittel keine ästhetischen Anforderungen
gestellt werden.Field of application of the invention
The invention relates to powdered corrosion protection agents for the protection of reinforcing steel in building materials and components made of silicate concrete, which do not ensure permanent passivation of the reinforcing steel. They can also be used where there are no aesthetic requirements for corrosion protection agents.
Charakteristik der bekannten technischen Lösungen
Für den Korrosionsschutz von Bewehrungsstahl in Silikatbetonen
ist gemäß WP C 04 B/264 250 ein pulverförmiges Korrosionsschutzmittel
auf der Grundlage einer Mischung aus den bituminösen
Stoffen Steinkohlenteerpech oder Bitumen mit einem Erweichungspunkt
≦λτ70°C, aus den Hochpolymeren Polyethylen, Polyvinylchlorid
und/oder Polyamid, aus Portlandzement und Schiefermehl
bekannt.
Die Verwendung der Mischungszusammensetzung mit Steinkohlenteerpech
bewirkt ein besseres Korrosionsschutzverhalten im Vergleich
zu der mit geblasenem Bitumen. Medizinische Untersuchungen haben
ergeben, daß das Arbeiten mit Steinkohlenteerpech eine Gesundheitsgefährdung
darstellt.
Fernerhin zeigte sich bei der Verwendung von Polyvinylchlorid
im Prozeß des Verarbeitens nach dem Wirbelsinterverfahren und
der nachfolgenden Autoklavisierung des Silikatbetons eine geringfügige
thermische Spaltung, die den Korrosionsschutzeffekt
negativ beeinflußt.
Bei auftretenden mechanischen Belastungen im Verarbeitungsprozeß
neigt das Korrosionsschutzmittel der bekannten Rezepturen
zu hoher Sprödigkeit.Characteristic of the known technical solutions
According to WP C 04 B / 264 250, a powdery corrosion protection agent based on a mixture of the bituminous substances coal tar pitch or bitumen with a softening point ≦ λτ70 ° C, from the high polymers polyethylene, polyvinyl chloride and / or polyamide, is used for the corrosion protection of reinforcing steel in silicate concrete. known from Portland cement and slate flour.
The use of the mixture composition with coal tar pitch results in a better corrosion protection behavior compared to that with blown bitumen. Medical examinations have shown that working with coal tar pitch is a health hazard.
Furthermore, the use of polyvinyl chloride in the process of processing using the fluidized bed process and the subsequent autoclaving of the silicate concrete showed a slight thermal cracking, which has a negative effect on the corrosion protection effect.
If mechanical loads occur in the processing process, the anti-corrosion agent of the known formulations tends to be very brittle.
Ziel der Erfindung
Mit der Erfindung soll ein pulverförmiges Korrosionsschutzmittel
für den Korrosionsschutz des Bewehrungsstahls in Silikatbetonen
zum Einsatz kommen, das beim Verarbeiten und der hydrothermalen
Härtung des Betons keine Gebrauchswertminderung erfährt
und für die im Prozeß des Herstellens und Verarbeitens
stehenden Menschen keine Gesundheitsgefährdung besteht.Aim of the invention
The invention is intended to use a powdered anticorrosive for the corrosion protection of the reinforcing steel in silicate concrete, which does not experience a reduction in utility value during processing and the hydrothermal hardening of the concrete and which poses no health risk to the people involved in the manufacturing and processing process.
Wesen der Erfindung
Die technische Aufgabe, die mit der Erfindung gelöst werden
soll, besteht in einem pulverförmigen Korrosionsschutzmittel
mit der Grundkomponente Bitumen, das eine Zerstörung des Schutzüberzuges
und Enthaftung am zu schützenden Gegenstand durch das
bei der Autoklavisierung des Betons herrschende Regime von
Druck, Temperatur und Alkalität ausschließt und eine hinreichende
Schlagzähigkeit als Schutzüberzug erzielt.
Auf der Grundlage einer Mischung aus Bitumen mit einem Erweichungspunkt
≦λτ70°C, aus Hochpolymeren und aus einem Stahlpassivierungsmittel
wird die Aufgabe erfindungsgemäß dadurch gelöst,
daß die Mischung aus
42-62 Masse-% Bitumen
36-55 Masse-% Kalziumhydroxid
2-7 Masse-% Ethylen-Vinylacetat-Kopolymer oder
4-10 Masse-% Ethylen-Vinylacetat-Vinylchlorid-
Pfropfkopolymerisat
0-6 Masse-% Polyvinylchlorid
besteht.Essence of the invention
The technical problem that is to be solved with the invention consists in a powdered corrosion protection agent with the basic component bitumen, which prevents the protective coating from being destroyed and detached from the object to be protected by the pressure, temperature and alkalinity regimes prevailing during the autoclaving of the concrete, and achieved sufficient impact strength as a protective coating.
Based on a mixture of bitumen with a softening point ≦ λτ70 ° C, of high polymers and a steel passivating agent, the object is achieved in that the mixture of
42-62 mass% bitumen
36-55% by mass calcium hydroxide
2-7% by mass of ethylene-vinyl acetate copolymer or
4-10% by mass of ethylene-vinyl acetate-vinyl chloride graft copolymer
0-6 mass% polyvinyl chloride
consists.
62 Masseprozent gemahlenes Bitumen 125/0 werden mit 36 Masseprozent Calziumhydroxid und 2 Masseprozent Ethylen-Vinylacetat- Copolymer intensiv vermischt und thermisch zu einer homogenen Schmelze verarbeitet. Nach dem Erkalten wird das Produkt durch Brechen, Mahlen und Sieben auf ein Brauchkorn im Bereich 100 . . . 300 µm aufbereitet.62 percent by weight of ground bitumen 125/0 becomes 36 percent by weight Calcium hydroxide and 2 mass percent ethylene vinyl acetate Copolymer mixed intensively and thermally to a homogeneous Melt processed. After cooling, the product is through Breaking, grinding and sifting on a grain in the area 100. . . 300 µm processed.
62 Masseprozent gemahlenes Bitumen 125/0 werden mit 36 Masseprozent
Calziumhydroxid und 4 Masseprozent Ethylen-Vinylacetat-
Vinylchlorid-Pfropfcopolymerisat als Pulver vorgemischt und zu
einer homogenen Schmelze verarbeitet. Die Aufbereitung erfolgt
analog Beispiel 1.
Folgende Tabelle gibt einen Überblick von möglichen
Mischungszusammensetzungen.
62 percent by weight of ground bitumen 125/0 are premixed as a powder with 36 percent by weight of calcium hydroxide and 4 percent by weight of ethylene-vinyl acetate-vinyl chloride graft copolymer and processed to form a homogeneous melt. The preparation is carried out analogously to example 1.
The following table provides an overview of possible mixture compositions.
Claims (1)
42-62 Masse-% Bitumen
36-55 Masse-% Kalziumhydroxid
2-7 Masse-% Ethylen-Vinylacetat-Kopolymer oder
4-10 Masse-% Ethylen-Vinylacetat-Vinylchlorid-Pfropfkondensat
0-16 Masse-% PolyvinylchloridPowdered corrosion protection agent, preferably for reinforcing steel in silicate concrete, based on a mixture of bitumen with a softening point ≦ λτ70 ° C, of high polymers and a steel passivating agent, characterized in that the mixture consists of
42-62 mass% bitumen
36-55% by mass calcium hydroxide
2-7% by mass of ethylene-vinyl acetate copolymer or
4-10% by mass of ethylene-vinyl acetate-vinyl chloride graft condensate
0-16 mass% polyvinyl chloride
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD27894985 | 1985-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3618478A1 true DE3618478A1 (en) | 1987-01-29 |
Family
ID=5569907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19863618478 Withdrawn DE3618478A1 (en) | 1985-07-25 | 1986-06-02 | Pulverulent anti-corrosion agent, preferably for reinforcement steel in concrete |
Country Status (3)
| Country | Link |
|---|---|
| BG (1) | BG47398A1 (en) |
| CS (1) | CS455886A1 (en) |
| DE (1) | DE3618478A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4023226C1 (en) * | 1990-07-21 | 1992-01-23 | Institut Fuer Baustoffpruefung Waldkirch Gmbh, 7808 Waldkirch, De | |
| CN104140584A (en) * | 2014-07-13 | 2014-11-12 | 河北奥磊防腐设备有限公司 | Fluoride crosslinked polyethylene high-temperature corrosion protection powder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1263953B (en) * | 1962-08-30 | 1968-03-21 | Kabel Metallwerke Ghh | Bituminous corrosion protection compound for metal-sheathed electrical cables with an outer protective cover made of polyvinyl chloride or vinyl chloride copolymers plasticized with monomeric plasticizers |
| DE1669275A1 (en) * | 1966-05-14 | 1971-10-28 | Riehm Hans | Anti-corrosive agents |
| DE2152312A1 (en) * | 1971-10-20 | 1973-04-26 | Gni I Pi Silikatnowo Betona Aw | Anticorrosion treating material for steel reinforcings - for concrete - contg sand quicklime and bitumen |
| DE3303217A1 (en) * | 1983-02-01 | 1984-08-02 | Lechler Chemie Gmbh, 7000 Stuttgart | Corrosion inhibitor based on calcined hydraulic lime |
| DD230706A3 (en) * | 1984-04-26 | 1985-12-11 | Bauakademie Ddr | POWDER-FUSED CORROSION PROTECTION, PREFERABLY FOR REINFORCEMENT STEEL IN SILICATE CONCRETE |
-
1986
- 1986-06-02 DE DE19863618478 patent/DE3618478A1/en not_active Withdrawn
- 1986-06-19 BG BG7543186A patent/BG47398A1/en unknown
- 1986-06-20 CS CS864558A patent/CS455886A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1263953B (en) * | 1962-08-30 | 1968-03-21 | Kabel Metallwerke Ghh | Bituminous corrosion protection compound for metal-sheathed electrical cables with an outer protective cover made of polyvinyl chloride or vinyl chloride copolymers plasticized with monomeric plasticizers |
| DE1669275A1 (en) * | 1966-05-14 | 1971-10-28 | Riehm Hans | Anti-corrosive agents |
| DE2152312A1 (en) * | 1971-10-20 | 1973-04-26 | Gni I Pi Silikatnowo Betona Aw | Anticorrosion treating material for steel reinforcings - for concrete - contg sand quicklime and bitumen |
| DE3303217A1 (en) * | 1983-02-01 | 1984-08-02 | Lechler Chemie Gmbh, 7000 Stuttgart | Corrosion inhibitor based on calcined hydraulic lime |
| DD230706A3 (en) * | 1984-04-26 | 1985-12-11 | Bauakademie Ddr | POWDER-FUSED CORROSION PROTECTION, PREFERABLY FOR REINFORCEMENT STEEL IN SILICATE CONCRETE |
Non-Patent Citations (2)
| Title |
|---|
| Chemical Abstracts, Vol. 88, 1978, Referat Nr. 172053y der JP 05 234/78 * |
| Derwent-Ref. Nr. 78066X/42, 1976, der JP 50-0 70 421 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4023226C1 (en) * | 1990-07-21 | 1992-01-23 | Institut Fuer Baustoffpruefung Waldkirch Gmbh, 7808 Waldkirch, De | |
| CN104140584A (en) * | 2014-07-13 | 2014-11-12 | 河北奥磊防腐设备有限公司 | Fluoride crosslinked polyethylene high-temperature corrosion protection powder |
| CN104140584B (en) * | 2014-07-13 | 2016-08-24 | 河北奥磊防腐设备有限公司 | Fluorination crosslinked polyethylene high-temperature anticorrosion powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CS455886A1 (en) | 1988-09-16 |
| BG47398A1 (en) | 1990-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8139 | Disposal/non-payment of the annual fee |