| 摘要 |
Fill and ground binding agent comprises (by wt.%) cement 1-30 pref. 1-15, more pref. 7-10; and waste (I) 99-70, (I) being fly ash or prods. of de-sulphurisation of granulated blast-furnace slag, mixed with water and/or air, pref. fly ash 99-85 pref. 93-90. The compsn. pref. contains water to a water binder index (water/(cement + fly ash) of 0.20-0.60 pref. 0.38. |
