| 摘要 |
<p>Building material compsn. consists of cement or cement-containing binder, >=0.05, pref. 0.1-6 wt. % of at least one cpd. splitting off aldehyde, pref. paraformaldehyde, and >=0.1, pref. 0.2-1.1 wt. % (all w.r.t. binder) and ammeline (cyanuric acid diamide) and opt. fillers and aggregates, pref. sand, flue dust, foamed plastics, wood fibre, glass wool, rock wool or mineral light aggregates. Compsn. is pref. used for prodn. of heat-treated finished parts, such as concrete blocks or pipes, ceilings, external wall slabs prestressed and steel concrete.</p> |
