Ground glass coated building element mfr. - using mortar contg. ground glass particles

摘要

Building components of concrete or similar cast prods. having a surface at least partially covered with a hard material for exposure to the outside, are prepd. by (a) fusing a mixt. of sand, soda, lime and crushed glass and forming blocks of glass; (b) crushing and grinding the glass blocks and sepg. the powder into different particle size fractions from 4-35 mm.; (c) selecting one of these fractions and sieving to remove scrap and grinding dust; (d) adding the ground glass fraction into a surface mortar and (e) applying the mortar to the surfaces of the building components. Building blocks are prepd. with at least one surface covered with glass which may be coloured and forms an attractive decorative finish.