| 摘要 |
<p>Porous concrete which is produced from cement, an aggregate in the form of sand, water and a pore-forming foaming agent. The aggregate is slag sand ground to a particle size of 0/2 mm and having a fine particle fraction below 0.125 mm of from 3 to 20% by weight. If desired, up to 25% by weight of natural sand can be mixed into the slag sand.</p> |
