<p>The invention relates to the manufacture of concrete roof tiles having increased early strength. In particular, this is produced by including crushed waste concrete in the cementitious mixture. For example, the increased strength is obtained if (i) crushed waste concrete is used as a replacement for aggregate; (ii) crushed waste concrete is used as a nucleating agent; and (iii) crushed waste concrete is graded such that it can be used to replace aggregate and to effect nucleation.</p>
申请公布号
AT145637(T)
申请公布日期
1996.12.15
申请号
AT19930911794T
申请日期
1993.04.27
申请人
BRAAS & CO. GMBH
发明人
ONABOLU, KUNLE;BARKER, HOWARD, ANTHONY;SMITH, BERNARD, EASOM 7 THE GRANGE;BRAAS, JUERGEN;DRECHSLER, ANDREAS;CZAPLA, BERNHARD;NEUPERT, DANIEL