| 摘要 |
<p>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.</p> |
