Method for producing hardened cement mineral material,...

Details Method for producing hardened cement mineral material,... Method for producing hardened cement mineral material,...

B - Operations, Transporting

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25/104, 259/2

B28B 17/02 (2006.01) C04B 24/04 (2006.01) C04B 24/10 (2006.01) C04B 24/18 (2006.01)

Patent

CA 1293111

Abstract of the Disclosure The invention concerns a method for produc- ing a hardened mineral product, especially concrete. The method utilizes a hydraulically setting binding agent, which is subjected to a hydration reaction with water for at least 1 hour, preferably for 4...40 hours, by producing a water/binding agent paste containing components for retardation of binding agent crystallization together with other possible admix- tures, e.g., accelerators. When the binding agent reaches an appropriate degree of hydration, preferably 10...90%, the unset paste is complemented with fillers for producing the desired mineral mix, after which the end product is shaped as desired and hardened. The water/binding agent paste is agitated in order to promote the hydration reaction, and when required, admixed with an additional amount of the retarding component of the binding agent crystallization. Furthermore, the invention includes an apparatus for hydrating the binding agent with a facility for subjecting the paste to compacting pressurization in order to improve hydration.

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