| 摘要 |
<p>A building mixture of small ûgrained macroporous concrete for paving slab and similar articles contains, % by weight: 9.5-23.5 of plaster-free Portland cement, 70.55-84.55 of granite screenings, 0.04-0.06 of construction gypsum, 0.095-0.242 of calcium nitrate, the water is the rest. Articles of such building mixture have a high abrasion resistance, a high frost-resistance and longevity.</p> |
