Loose, substantially sphere-shaped particles of a foamed plastic material, e.g., polystyrene, are blended with a binder consisting of a solution of 75-85% by weight of coal-tar pitch having a ring and ball softening point of 50.degree.-65.degree. C. in 15-25% by weight of phenol-free coal-tar oil having...http://www.google.es/patents/US4547331?utm_source=gb-gplus-sharePatente US4547331 - Method for manufacturing light-weight shaped concrete articles, such as block-shaped building elements
Method for manufacturing light-weight shaped concrete articles, such as ...
