Method of producing sand-lime bricks with a low bulk density
OwnerKarlhans Wesche, Peter H. Schubert +1inventors
InventorsKarlhans Wesche, Peter H. Schubert, Horst W. Glitza
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Abstract
A method for producing sand-lime bricks of low bulk density and having a green strength of at least 1 kp/cm.sup.2 in which at least 1% by weight of cement is added to a mixture of sand, lime and water and the mixture is then compacted in molds by vibration or under a pressure of less than 150 kp/cm.sup.2 to form bricks which are subsequently cured.
Claims15
A method for producing a sand-lime building brick of low bulk density comprising the steps of:
- (a) preparing a mixture of sand, lime, water and cement, said mixture consisting essentially of sand, lime and water and also including a relatively small amount of cement as a binder, said cement being present in relatively small amount in relation to the total amount of said sand, lime and water, said cement being present in an amount in excess of 1% by weight to provide said mixture with a green strength of at least 1 kg/cm.sup.2 subsequent to compaction of said mixture;
- (b) compacting said mixture in a mold at a pressure of less than 150 kg/cm.sup.2 to form green brick;
- (c) removing said green brick from said mold;
- (d) transporting said green brick to an autoclave;
- and
- (e) curing said green brick in the autoclave to form said building brick.
In a method for producing a sand-lime building brick by molding a mixture consisting essentially of sand, lime, and water in a mold under pressure to form green brick, removing the green brick from the mold and curing the green brick in an autoclave to produce said building brick, the improvements of:
- lowering the bulk density of the building brick by incorporating in said mixture a relatively small amount of cement as a binder, said amount being small in relation to the total amount of said sand, lime and water, and compacting said mixture at a pressure less than 150 kg/cm.sup.2 to form the green brick, said cement being present in said mixture in an amount sufficient to produce a green brick having a strength of at least 1 kg/cm.sup.2.
Dependencies are inferred from the claim text.