摘要:
A porous ceramic structure has a porous ceramic aggregate configured from a plurality of porous ceramic particles, and the ratio of the number of corners at locations where two other porous ceramic particles are facing a corner of a porous ceramic particle with respect to the number of corners of the porous ceramic particles included in the porous ceramic aggregate is 80% or greater.
摘要:
To facilitate the lifting of slab-like pieces of material separated from a block of material by substantially horizontal cuts, with the aid of a movable suction device acting upon the upper surface of an upper slab-like piece of material, a pressurized gaseous medium is caused to act in the region of the cut between the upper piece of material and the underlying slab-like piece of material or residual part of the block of material, either prior to and/or while lifting said upper piece. The pressurized medium is supplied into a least one cavity which has an open side and is formed in a movable cover means arranged along a substantially vertical side of the block subsequent to moving the cover means to a position in which it is sealingly connected to and each open cavity side thereof is covered by a portion of said block side, which portion extends along and reaches above and below said region of the cut.
摘要:
A process for the production of porous concrete building elements in which a large block is cast in a mould, the block while still plastic is cut up by means of tensioned cutting wires into plates or bricks by cuts made in planes parallel to the narrow edges of the block, the cut block is turned onto one of its broad faces so that the lines of division are in vertical planes, thus preventing deformation and sticking together of the cut elements, and while in this position the elements are steamhardened in an autoclave.
摘要:
The invention relates to an apparatus for cutting a block of material in a plastic state, more particularly lightweight concrete, the block being cut by a number of cutting wires, each tensioned between a clamping member retained above the block and a clamping member retained therebelow. The block is cut while being carried by carrying means engaging opposite sides of the block.
摘要:
Apparatus for cutting a block of material in a plastic state, more particularly light weight concrete, comprising a plurality of supports which extend transversely of a cutting direction and whose upper surfaces are formed with a plurality of projections; a plurality of rods extending in the cutting direction and loosely spaced out one beside the other between the projections, for carrying the block; and a number of cutting wires. The parts of the block disposed at a cutting wire width from one another cannot be pushed against one another, as is needed for cutting the parts of the block in a direction transverse of the cutting already performed, to prevent the tearing and crumbling of the parts of the block during the second cutting. This apparatus is improved in that the supports adjoin one another, and the projections and the rods are substantially of the same height and cooperate to form a flat table.