| 摘要 |
The invention relates to a ready-for-use dual-component system including a portion (A) containing retarded aqueous-phase aluminous cement and an aqueous phase portion (B) for initiating the curing process. The portion (A) further includes boric acid or a salt thereof, at least one super-plasticizer and water. The portion (B) includes an initiator and water. According to the invention, the dual-component system meets the following requirements: a) the initiator includes uniquely lithium salts and contains a mixture of lithium hydroxide and at least another water-soluble lithium salt, preferably a lithium sulphate or carbonate; the total mass of the lithium element (Li) in the portion (B) is such that, after mixing with the portion (A), it ranges from 0.5 wt % to 2 wt % relative to the weight of aluminous cement in the portion (A), preferably from 0.8 wt % to 1.3 wt %; and c) the mass of the lithium element (Li) in the portion (B) added by the lithium hydroxide is such that, after mixing with the portion (A), it ranges from 0.1 wt % to 1 wt % relative to the weight of aluminous cement in the portion (A), preferably from 0.15 wt % to 0.4 wt %. |
