C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/22 (2006.01) C04B 14/10 (2006.01) C04B 20/00 (2006.01) C04B 38/00 (2006.01)
Patent
CA 2464901
A binder mix containing a hydraulic binding agent and an admixture mixed therewith, a process for preparing a hydraulically hardened binder mass, a calcinated kaolin product and a process for preparing the same. A paste-like composition is formed from the hydraulically hardening binding agent, a pozzolanically reacting admixture and water, which, when so desired, contains stone aggregate or similar filler, the paste-like composition is worked and the worked composition is allowed to harden to form the binder mass. The admixture comprises spherical, porous metakaolin agglomerates, the size of which is 2-200 microns and which have an open pore structure. The invention can be used to improve the manufacturing methods of cast concrete products and shorten the manufacturing times, and to provide concrete with better mechanical and chemical properties, as well as improve the fire and frost resistance of concrete.
L'invention porte: sur un mélange liant contenant un liant hydraulique et un adjuvant; sur le procédé de préparation d'une masse durcie de liant hydraté; et sur un produit de kaolin calciné et son procédé de préparation. A cet effet on forme une pâte comprenant le liant hydraulique, un adjuvant réagissant à la pouzzolane, et de l'eau, auquel on peut ajouter facultativement un agrégat pierreux ou une charge similaire, et qu'on laisse durcir pour former la masse du liant. L'adjuvant consiste en agglomérats de particules sphériques poreuses à pores ouverts de métakaolin, d'une taille comprise entre 2 et 200 µ. L'invention peut servir à améliorer les produits de béton moulé, à raccourcir les temps de fabrication, et à donner des bétons présentant de meilleures caractéristiques mécaniques et chimiques et une meilleure résistance au feu et au gel.
Kautar Oy
Nordkalk Oyj Abp (a Finnish Joint Stock Company)
Norton Rose Or S.e.n.c.r.l.,s.r.l./llp
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