Method of rolling a plastically deformable material
First Claim
1. A method of rolling a plastically deformable material, viz., a material which behaves as a single phase which is deformed plastically when subjected to deformation forces, which comprises:
- (a) compounding a plastically deformable composite material comprising the following constituents;
(A) inorganic solid particles of a material selected from the group consisting of hydraulic cement, fly ash, and mixtures thereof, said particles having a size of from 0.5 to 100 μ
m;
(B) silica particles having a size of from 50 Å
to 0.5 μ
m and being at least one order of magnitude smaller than the cement/fly ash particles A;
a surface-active dispersing system; and
water;
the amount of the particles A constituting from B 40% to 70% by weight of the composite material and substantially corresponding to dense packing thereof with the particles B being homogeneously arranged in the voids between the cement/fly ash particles A, the amount of water constituting from 7-20% by weight of the composite material and substantially corresponding to the amount necessary to fill the voids between the solid particles of the composite material, and the dispersing system being present in an amount sufficient to impart to the composite material a plastic consistency in a stress field of up to 200 kg/cm2 ;
(b) introducing the composite material into a wedge-like space defined between oppositely arranged surface parts, at least one of said parts being gas-permeable and substantially impervious to said material; and
(c) moving said surface parts so as to entrain the material towards and through the throat or gorge of said space,the composite material retaining substantially all of its original water content after steps (b) and (c) and continuing to behave as a one-phase plastically deformable material.
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Accused Products
Abstract
A method of rolling a plastically deformable material which behaves as a single phase and which is deformed plastically when subject to deformation forces, which material comprises from 40% to 70% by weight of hydraulic cement and/or fly-ash particles A of from 0.5 to 100 μm, silica particles B of from 50 Å to 0.5 μm (which are at least one order of magnitude smaller than the cement/fly-ash particles A), a surface-active dispersing system present in an amount sufficient to impart to the composite material a plastic consistency in a stress field of up to 200 kg/cm sq., and from 7% to 20% by weight water; the silica particles B being homogeneously arranged in the voids between the densely packed cement/fly-ash particles A, and the amount of water substantially corresponding to the amount necessary to fill the voids between the solid particles of the composite material. In accordance with the method, the composite material is introduced into a wedge-like space defined between oppositely arranged surface parts, at least one of which is gas-permeable, e.g., a continuous band or belt, and the surface parts are moved relative to the material so as to entrain or roll it towards and through the throat or gorge of the space. The plastically deformable material retains substantially all of its original water content and continues to behave as a one-phase, plastically deformable material after rolling, and possesses a substantially smooth and uniform outer surface without material defects.
77 Citations
20 Claims
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1. A method of rolling a plastically deformable material, viz., a material which behaves as a single phase which is deformed plastically when subjected to deformation forces, which comprises:
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(a) compounding a plastically deformable composite material comprising the following constituents; (A) inorganic solid particles of a material selected from the group consisting of hydraulic cement, fly ash, and mixtures thereof, said particles having a size of from 0.5 to 100 μ
m;(B) silica particles having a size of from 50 Å
to 0.5 μ
m and being at least one order of magnitude smaller than the cement/fly ash particles A;
a surface-active dispersing system; and
water;the amount of the particles A constituting from B 40% to 70% by weight of the composite material and substantially corresponding to dense packing thereof with the particles B being homogeneously arranged in the voids between the cement/fly ash particles A, the amount of water constituting from 7-20% by weight of the composite material and substantially corresponding to the amount necessary to fill the voids between the solid particles of the composite material, and the dispersing system being present in an amount sufficient to impart to the composite material a plastic consistency in a stress field of up to 200 kg/cm2 ; (b) introducing the composite material into a wedge-like space defined between oppositely arranged surface parts, at least one of said parts being gas-permeable and substantially impervious to said material; and (c) moving said surface parts so as to entrain the material towards and through the throat or gorge of said space, the composite material retaining substantially all of its original water content after steps (b) and (c) and continuing to behave as a one-phase plastically deformable material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of rolling a plastically deformable material, viz., a material which behaves as a single phase which is deformed plastically when subjected to deformation forces, which comprises:
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(a) compounding a plastically deformable composite material comprising the following constituents; (A) from 40 to 70% by weight of inorganic solid particles of a material selected from the group consisting of hydraulic cement, fly ash, and mixtures thereof, said particles having a size of from 0.5 to 100 μ
m;(B) from 5 to 30% by weight of ultrafine silica particles having a size of from 50 Å
to 0.5 μ
m and being at least one order of magnitude smaller than the cement/fly ash particles A;(C) from 2 to 10% by weight of a solid plasticizing agent; (D) from 5 to 30% by weight of smooth rod-like or acicular bodies having an aspect ratio of from 3;
1 to 100;
1 and a diameter of the order of 0.5 to 10 μ
m;(E) from 0.5 to 10% by weight of reinforcing fibers having an aspect ratio of at least 100;
1;
a surface-active dispersing system; and
from 7-20% by weight water;the cement/fly ash particles A being densely packed with the particles B being homogeneously arranged in the voids therebetween, the amount of water substantially corresponding to the amount necessary to fill the voids between the solid particles of the composite material, and the dispersing system being present in an amount sufficient to impart to the composite material a plastic consistency in a stress field of up to 200 kg/cm2 ; (b) introducing the composite material into a wedge-like space defined between oppositely arranged surface parts, at least one of said parts being a gas-permeable band which is substantially impervious to said material; (c) moving said surface parts so as to roll the material towards and through the throat or gorge of said space, the composite material retaining substantially all of its original water content after steps (b) and (c) and continuing to behave as a one-phase plastically deformable material; and (d) peeling the gas-permeable band off the rolled material by bending it away from the material at a sharp angle.
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Specification