초록 ▼

Low density cementitious compositions are disclosed which are essentially the hydrated products from mixtures of inorganic hydratable binders such as gypsum and Portland cement with a novel lightweight aggregate material comprised of partially combusted bark particles obtained from bark-burning boil

Low density cementitious compositions are disclosed which are essentially the hydrated products from mixtures of inorganic hydratable binders such as gypsum and Portland cement with a novel lightweight aggregate material comprised of partially combusted bark particles obtained from bark-burning boiler furnaces of pulp processing concerns. Preferred compositions additionally incorporate conventional additives such as surfactants, fibrous materials, foam stabilizers and conventional lightweight aggregate such as expanded vermiculite to give products useful as lightweight thermal insulation concretes and fireproofings.

대표청구항 ▼

A hydratable composition which when mixed with water and allowed to hydrate hardens to a low density mass comprising a hydratable inorganic binder in admixture with from about 1 to about 50 percent by weight based on said composition of a lightweight aggregate comprised of combusted bark particles o

A hydratable composition which when mixed with water and allowed to hydrate hardens to a low density mass comprising a hydratable inorganic binder in admixture with from about 1 to about 50 percent by weight based on said composition of a lightweight aggregate comprised of combusted bark particles obtained by partially combusting essentially the bark, in particulate form, removed from logs in a furnace.