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摘要

The invention relates to a process for producing a hardened stone material product, in particular concrete or mortar. According to the process, use is made of a hydraulic hardening binder, which is brought into hydration reaction with water for a period of at least approx. 1 hour, preferably for from 4 to 40 hours, by an aqueous slurry being formed from the binder, which slurry contains components which retard the crystallisation of the binder and also, where appropriate, other additives, such as accelerators. When the binder has reached a suitable degree of hydration, preferably a degree of hydration of between 10 and 90%, filler is added to the unsolidified slurry for the purpose of forming the stone material mass, after which the desired piece is formed and hardened. The aqueous slurry is stirred in order to promote the hydration reaction, and more of the component which retards the crystallisation of the binder is added if necessary. The invention also relates to a device for hydrating the binder, which device can be used to subject the slurry to a compressing pressure effect in order to render the hydration more effective.