Methods for producing fiber cement products with fiber cement waste
AssigneeEtex Services NV
InventorLuc Van Der Heyden
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Abstract
The present invention relates to methods for the production of fresh cured fiber cement products. More particularly, the present invention provides methods for the production of fresh fiber cement products comprising cured fiber cement waste material, at least comprising the steps of: (a) Providing a cured fiber cement waste powder by comminuting cured fiber cement waste material; (b) Providing an aqueous fiber cement slurry comprising water, cementitious binder, natural or synthetic fibers and said cured fiber cement waste powder; (c) Forming a green fiber cement sheet from said aqueous fiber cement slurry; and (d) Autoclave-curing said green fiber cement sheet thereby providing a fresh fiber cement product.
Claims9
A method for the production of fresh fiber cement products comprising cured fiber cement waste material, comprising the steps of:
- (a) Providing a cured fiber cement waste powder by comminuting cured fiber cement waste material;
- (b) Providing an aqueous fiber cement slurry comprising water, cementitious binder, natural or synthetic fibers and said cured fiber cement waste powder;
- (c) Forming a green fiber cement sheet from said aqueous fiber cement slurry;
- (d) Pressing said green fiber cement sheet with a pressure of between about 100 kg/cm2 and 300 kg/cm2;
- and
- (e) Autoclave-curing said green fiber cement sheet, thereby providing a fresh fiber cement product,
- wherein said step (b) of providing an aqueous fiber cement slurry comprises mixing water, cementitious binder, natural or synthetic fibers and the cured fiber cement powder, such that the cured fiber cement powder is present in the aqueous fiber cement slurry in an amount of between about 10M % and about 40M % of the dry basis of said slurry, the unit M % referring to the mass percentage of the component over the total dry mass of the composition.
Dependencies are inferred from the claim text.