Grouting material

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 28/02 (2006.01) C04B 18/14 (2006.01) C04B 20/00 (2006.01) C04B 22/14 (2006.01) C04B 24/06 (2006.01) C04B 24/22 (2006.01)

Patent

CA 2659051

A grout comprising a microparticulate material of 5000 cm2/g or greater Blaine specific surface area composed of 30 to 60 mass% of cement clinker and 40 to 70 mass% of blast-furnace slag and, per 100 parts by mass of the sum of cement clinker and blast-furnace slag, 0.5 to 3 parts by mass, in terms of SO3, of gypsum, wherein per 100 parts by mass of microparticulate material mentioned above, there are incorporated 4 to 8 parts by mass of calcium aluminate quick hardening admixture (i), 0.05 to 0.2 part by mass of setting regulator (ii) and 0.5 to 1.7 parts by mass of high-performance water-reducing agent (iii). This grout maintains a low viscous state over a prolonged period of time, being capable of gel time control and excels in short-time strength development.

La présente invention concerne un coulis comprenant un matériau sous forme de microparticules de surface spécifique de Blaine supérieure ou égale à 5000 cm<SUP>2</SUP>/g composé de 30 à 60 % en masse de scorie de ciment et de 40 à 70 % en masse de laitier de haut fourneau et, pour 100 parties en masse de la somme de scorie de ciment et de laitier de haut fourneau, de 0,5 à 3 parties en masse, en termes de SO<SUB>3</SUB>, de gypse. Pour 100 parties en masse de matériau sous forme de microparticules mentionné ci-dessus, on incorpore de 4 à 8 parties en masse de mélange à prise rapide d'aluminate de calcium (i), de 0,05 à 0,2 partie en masse de régulateur de prise (ii) et de 0,5 à 1,7 partie en masse d'agent réducteur d'eau à rendement élevé (iii). Ce coulis maintient un état faiblement visqueux sur une période prolongée, peut réguler la durée de gel et excelle en termes d'obtention rapide de la robustesse requise.

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