FR2464350A1 - Biodegradable formwork for concrete - provides protection over concrete-maturing period and is applicable to marine structures - Google Patents
Biodegradable formwork for concrete - provides protection over concrete-maturing period and is applicable to marine structures Download PDFInfo
- Publication number
- FR2464350A1 FR2464350A1 FR7921497A FR7921497A FR2464350A1 FR 2464350 A1 FR2464350 A1 FR 2464350A1 FR 7921497 A FR7921497 A FR 7921497A FR 7921497 A FR7921497 A FR 7921497A FR 2464350 A1 FR2464350 A1 FR 2464350A1
- Authority
- FR
- France
- Prior art keywords
- concrete
- formwork
- biodegradable
- applicable
- provides protection
- 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- Withdrawn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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G9/00—Forming or shuttering elements for general use
- E04G9/02—Forming boards or similar elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
La présente invention a pour objet l'utilisation de coffrages ou enveloppes autodestructibles ou biodégradables dans le domaine du génie civil de la construction du traitement des résidus. The present invention relates to the use of self-destructing or biodegradable forms or envelopes in the field of civil engineering in the construction of the treatment of residues.
La mise en plece de béton constitué soit d'agrégats classiques et de ciment soit de résidus ou sous-produits industriels convenoblement traités necéssite un coffrage adapté à la forme de l'ouvrage et qui est ensuite retiré aprés la prise du béton l'aspect et les volumes ne permettant pas de le laisser en place.The placing of concrete made up either of conventional aggregates and of cement or of residues or industrial by-products suitably treated requires a formwork adapted to the shape of the structure and which is then removed after the setting of the concrete the appearance and volumes do not allow to leave it in place.
Ces coffrages sont en général réalisés en métal bois produits plastiques ou divers pour btre solides et durables et permettre le plus grand nombre possible de réemplois en raison de leur prix de revient. Dans certains autres cas ils sont réalisés plus légèrement et laissés en place, on éléments perdus, mais cela n0est possible que pour les parties non visibles d'un ouvrage. These forms are generally made of metal, wood, plastic or various products to be solid and durable and allow the greatest possible number of re-uses because of their cost price. In some other cases they are made more lightly and left in place, there are lost elements, but this is only possible for the non-visible parts of a structure.
Certaines réalisations comma les protections à lo mer les digues les talus ne permettent la mise en place des éléments préfabriqués q'aprés un temps de prise et séchage long assurant une tenue de la réalisation en phase finale; en effet une mise en place hative risque des dégats de manutention et entrains une attaque des éléments comme la mer sur un ouvrage trop fragile et,trop frais. Certain constructions such as protections at sea, sea walls, embankments only allow the installation of prefabricated elements after a long setting and drying time ensuring that the construction is held in the final phase; in fact an early installation risks handling damage and leads to an attack of elements such as the sea on a too fragile and too fresh structure.
L'invention a pour objet de remédier à ces inconvénients en utilisant des coffrages du type défini dans le présent document. The object of the invention is to remedy these drawbacks by using formwork of the type defined in this document.
Ces coffrages sont faits a partir des produits mis au point par l'industrie chimique ou d'autres industries, a base de produits tels que plastiques végéteaux textiles ou autres et dont le traitement approprié leur permet do présenter les caractéristiques évoquées. These forms are made from products developed by the chemical industry or other industries, based on products such as plastics, textile plants or others and whose appropriate treatment allows them to have the characteristics mentioned.
La forme du coffrage est adaptée à l'ouvrage envisagé etle remplissage on béton est fait suivant les règles d'usage. The form of the formwork is adapted to the planned work and the filling on concrete is done according to the rules of use.
Dès q'une lègére prise permet la manutention la pièce est prise par un moyen de levage adapté et elle est mise aussitot à sa place finale avec son coffrage.As soon as a light grip allows handling the part is taken by a suitable lifting means and it is immediately put in its final place with its formwork.
Cette mise en place peut être faite entre 2 et 8 jours aprés mise en place du béton, tandis que par le procédé classique avec décoffrage avant mise on place et suivant la nature des opérations le délai de eise en place aprés fabrication peut aller de 25 à 80 jours.This installation can be done between 2 and 8 days after placing the concrete, while using the conventional process with formwork before placing and depending on the nature of the operations, the time to set up after manufacturing can range from 25 to 80 days.
Ce coffrcge aide à la tenue du béton et permet une manipulation facile en évitant les risques de bris, et en mème temps il assure une parfåite protection de l'ouvrage aux divers éléments extérieurs tels que la mer et il permet au béton de faire une prise dans les conditions finales de destination sans avoir à risquer une autre
manipulation avec ses risques.This form helps to hold the concrete and allows easy handling avoiding the risk of breakage, and at the same time it provides perfect protection of the structure against various external elements such as the sea and it allows the concrete to set in the final destination conditions without having to risk another
manipulation with its risks.
La durée de vie de ce coffrage est de I00 jours minimum et cette
protection est donc assurés dans les meilleures conditions pour la
prise parfaite du béton0
Passé ce délai le coffrage se détruit de lui-mème et disparait
en laissant à l'ouvrage son aspact final de béton et ses resistan-
ces correspondant à la période minimum de I00 jours de protection.The lifespan of this formwork is at least 100 days and this
protection is therefore ensured under the best conditions for the
perfect setting of concrete0
After this time the formwork destroys itself and disappears
leaving the final concrete aspact and its resistance to the structure
these corresponding to the minimum period of I00 days of protection.
Le résultat final est identique à tous autres procédés et le fait de l'autodestruction laisse place nette de tous éléments de coffrage. The final result is identical to all other processes and the fact of self-destruction leaves room for all formwork elements.
Les formes les plus diverses peuvent étre utilisées puisque les impératifs de décoffrage qui sont lourds en général n'existent pas dans le présent procédé. The most diverse forms can be used since the formwork requirements which are heavy in general do not exist in the present process.
Dans les problèmes plus complexes qui rendent difficile une mise en place de pièces il peut être procédé à la misewen place du cof frage et à son coullage de béton en place. La protection à l'eau peut être alors trés réduite dans le temps0 In more complex problems which make it difficult to place parts, the cof frage can be placed and its concrete poured in place. Protection against water can then be very reduced over time0
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7921497A FR2464350A1 (en) | 1979-08-28 | 1979-08-28 | Biodegradable formwork for concrete - provides protection over concrete-maturing period and is applicable to marine structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7921497A FR2464350A1 (en) | 1979-08-28 | 1979-08-28 | Biodegradable formwork for concrete - provides protection over concrete-maturing period and is applicable to marine structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2464350A1 true FR2464350A1 (en) | 1981-03-06 |
Family
ID=9229109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7921497A Withdrawn FR2464350A1 (en) | 1979-08-28 | 1979-08-28 | Biodegradable formwork for concrete - provides protection over concrete-maturing period and is applicable to marine structures |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2464350A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089051A2 (en) * | 1982-03-17 | 1983-09-21 | Norsk Hydro A/S | Self-disintegrating formwork |
-
1979
- 1979-08-28 FR FR7921497A patent/FR2464350A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089051A2 (en) * | 1982-03-17 | 1983-09-21 | Norsk Hydro A/S | Self-disintegrating formwork |
| EP0089051A3 (en) * | 1982-03-17 | 1985-05-02 | Norsk Hydro A/S | Self-disintegrating formwork |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |