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1. WO1998013179 - CONCRETE FORM LINER

Publication Number WO/1998/013179
Publication Date 02.04.1998
International Application No. PCT/US1997/016803
International Filing Date 23.09.1997
Chapter 2 Demand Filed 26.03.1998
IPC
B28B 7/36 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
28WORKING CEMENT, CLAY, OR STONE
BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
7Moulds; Cores; Mandrels
36Linings or coatings
E04G 9/10 2006.01
EFIXED CONSTRUCTIONS
04BUILDING
GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
9Forming or shuttering elements for general use
10with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
CPC
B28B 7/368
BPERFORMING OPERATIONS; TRANSPORTING
28WORKING CEMENT, CLAY, OR STONE
BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
7Moulds; Cores; Mandrels
36Linings or coatings, ; e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
368Absorbent linings
E04G 9/10
EFIXED CONSTRUCTIONS
04BUILDING
GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
9Forming or shuttering elements for general use
10with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
Applicants
  • E.I. DU PONT DE NEMOURS AND COMPANY [US]/[US]
Inventors
  • SERAFINI, Franco, Luigi
Agents
  • GORMAN, Thomas, W.
Priority Data
08/721,87327.09.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONCRETE FORM LINER
(FR) REVETEMENT POUR COFFRAGE A BETON
Abstract
(EN)
An improved concrete form liner includes a microporous membrane (14) having pores that transmit water, but prevent the passage of particles with a diameter of 2 microns or greater, and a porous sheet (16) having pores in the range of 0.2 microns to 60 microns on one side of the microporous membrane (14), the porous sheet (16) having an air permeability at least five times greater than that of the microporous membrane (14). The form liner (13) is permeable to air and water in a concrete mix, but is substantially impermeable to cement particles in the concrete mix. A drainage scrim (17) may be juxtaposed against the side of the microporous membrane (14) opposite the porous sheet (16).
(FR)
Un revêtement amélioré pour coffrage à béton comprend une membrane microporeuse (14) dont les pores laissent passer l'eau mais retiennent les particules d'un diamètre supérieur ou égal à 2 microns, et une feuille poreuse (16) dont les pores d'une taille comprise entre 0,2 micron et 60 microns située d'un côté de la membrane microporeuse (14); la feuille poreuse (16) se caractérisant par une perméabilité à l'air qui est au moins cinq fois supérieure à celle de la membrane microporeuse (14). Le revêtement (13) pour coffrage est perméable à l'air et à l'eau présents dans un mélange de béton, mais sensiblement imperméable aux particules de ciment présentes dans le mélange de béton. Un tamis (17) de drainage peut être juxtaposé contre le côté de la membrane microporeuse (14) située face à la feuille poreuse (16).
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