IMPROVEMENTS IN SANDWICH PANELS

摘要

A composite structural sandwich panel comprises spaced facing sheets of fibre reinforced cement or plywood and a lightweight cementitious core formed from a slurry of cement powder; water; a low density aggregate such as expanded plastics, exfoliated minerals such as perlite and vermiculite, ceramic or polymeric micro-spheres; and optional ingerdients including fly ash and lime. A modified carboxymethyl cellulose composition is added to the slurry to retain water and reduce localized migration of water into porous facing sheets at the interlace between the facing sheets and the core.