Embodiments of a system and a method for manufacturing a cementitious panel can be used to produce a cementitious panel having a multi-layer air/water barrier membrane assembly. The layers of the membrane can be built up via a series of applicator stations applying a fluid composition using roll coating, for example. Between applicator stations the applied layer of fluid composition can be subjected to drying conditions via infrared heating. To help protect from the deleterious effects of infrared heating, the cementitious panel can be conveyed through a cooling tunnel after each drying section.

The use of a cementitious composition is described, as a coating for disposable foundry cores, said cementitious composition comprising at least one binder or hydraulic cement in a quantity ranging from 40% to 99.9% by weight with respect to the total weight of the cementitious composition; possibly one or more fillers in a quantity ranging from 0.1% to 60% by weight, with respect to the total weight of the cementitious composition, said filler preferably having a D99<100 m; at least one rheology modifying agent selected from cellulose, derivatives of cellulose such as methylhydroxyethylcellulose, vinyl acetate/versatate copolymers, polycarboxylate ether polymer, or a mixture thereof, in a quantity ranging from 0.1% to 5% by weight with respect to the total weight of the cementitious composition. A disposable foundry core is also described, having at least one coating layer based on said cementitious composition.

Embodiments of a system and a method for manufacturing a cementitious panel can be used to produce a cementitious panel having a multi-layer air/water barrier membrane assembly. The layers of the membrane can be built up via a series of applicator stations applying a fluid composition using roll coating, for example. Between applicator stations the applied layer of fluid composition can be subjected to drying conditions via infrared heating. To help protect from the deleterious effects of infrared heating, the cementitious panel can be conveyed through a cooling tunnel after each drying section.