Manufacture of cellular lightweight concrete slabs

Claim 1

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding an at least approximately parallelepipedic, cellular body from a concrete mass that in a given stage after molding is plastic but self-supporting, subsequently dividing said body, when it is resting on a first support and while the concrete mass thereof is still plastic, by horizontal cuts into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice at the time is lifted away from the remainder of the body resting on the first support and transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which at least one of every two broadsides of adjacent pairs of slices, which will be facing each other in the pile on said second support, is subjected to a treatment capable of at least reducing the risk of the occurence of a firm binding between the piled body slices during the steam-hardening process.

Claim 2

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding an at least approximately parallelepipedic, cellular body from a concrete mass that in a given stage after molding is plastic but self-supporting, subsequently dividing said body, when it is resting on a first support and while the concrete mass thereof is still plastic, by horizontal cuts into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice at the time is lifted away from the remainder of the body resting on the first support and transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which at least one of every two broadsides of adjacent pairs of slices, which will be facing each other in the pile on said second support, is subjected to a treatment capable of at least reducing the risk of the occurence of a firm binding between the piled body slices during the steam-hardening process.

Claim 8

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding an at least approximately parallelepipedic, cellular body from a concrete mass that in a given stage after molding is plastic but self-supporting, subsequently dividing said body, when it is resting on a first support and while the concrete mass thereof is still plastic, by horizontal cuts into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice after the other by means of a vertically and horizontally movable suction head is lifted away from the remainder of the body resting on the first support and transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which the upper broadside of each body slice resting on the first support is subjected to a compacting treatment before the suction head is brought to engage the same for transferring the body slice in question to said second support.

Claim 9

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding an at least approximately parallelepipedic, cellular body from a concrete mass that in a given stage after molding is plastic but self-supporting, subsequently dividing said body, when it is resting on a first support and while the concrete mass thereof is still plastic, by horizontal cuts into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice after the other by means of a vertically and horizontally movable suction head is lifted away from the remainder of the body resting on the first support and transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which the upper broadside of each body slice resting on the first support is subjected to a compacting treatment before the suction head is brought to engage the same for transferring the body slice in question to said second support.

Claim 10

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding a substantially parallelepipedic, plastic and self-supporting cellular body from a concrete mass, subsequently making horizontal cuts through said body, when it is resting on a first support and while the concrete mass thereof is still plastic, to thereby divide it into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice after the other is lifted away from the remainder of the body resting on the first support and transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which at least one of the two broadsides of each body slice is subjected before the steam-hardening process to a treatment that includes the application of a surface covering layer to said broadside.

Claim 11

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding a substantially parallelepipedic, plastic and self-supporting cellular body from a concrete mass, subsequently making horizontal cuts through said body, when it is resting on a first support and while the concrete mass thereof is still plastic, to thereby divide it into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice after the other is lifted away from the remainder of the body resting on the first support and transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which at least one of the two broadsides of each body slice is subjected before the steam-hardening process to a treatment that includes the application of a surface covering layer to said broadside.

Claim 18

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding a substantially parallelepipedic, plastic and self-supporting cellular body from a concrete mass, subsequently making horizontal cuts through said body, when it is resting on a first support and while the concrete mass thereof is still plastic, to thereby divide it into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice at the time is first separated and then lifted away from the remainder of the body resting on the first support for being transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which at least one broadside of each body slice is subjected to a surface treatment at least reducing the risk of the occurence of a firm binding before coming into contact with an adjacent slice in said pile on the second support, each recently separated slice being removed from the remainder of the body before the next slice is cut free therefrom.

Claim 19

A method of manufacturing cellular lightweight concrete products comprising the steps of first molding a substantially parallelepipedic, plastic and self-supporting cellular body from a concrete mass, subsequently making horizontal cuts through said body, when it is resting on a first support and while the concrete mass thereof is still plastic, to thereby divide it into a plurality of slab-like slices, each of which has a thickness that is substantially less than the original height of the body, and finally steam-hardening a plurality of the body slices thus obtained as a group in an autoclave, while they are rested one on top of the other to form a pile, and in which one body slice at the time is first separated and then lifted away from the remainder of the body resting on the first support for being transferred to a second support, on which the slices thus received are piled in reversed order, one on top of the other, and in which at least one broadside of each body slice is subjected to a surface treatment at least reducing the risk of the occurence of a firm binding before coming into contact with an adjacent slice in said pile on the second support, each recently separated slice being removed from the remainder of the body before the next slice is cut free therefrom.