C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 9/12 (2006.01) C04B 28/04 (2006.01) C04B 28/06 (2006.01) C04B 28/10 (2006.01) C04B 28/32 (2006.01)
Patent
CA 2398793
Novel hydraulic cements are disclosed that include reactive magnesium oxide prepared by low temperature calcination. The cements can be formulated to suit a large number of applications with various setting times, strength and levels of sustainability either by adding iron salts such as ferrous sulfate or blending with other compatible faster setting hydraulic cements such as Portland cement or by using both methods. The compositions are able to incorporate relatively large amounts of low cost pozzolans such as fly ash to advantage as well as wastes. Many excellent properties are exhibited and in particular good comprehensive strength and resistance to sulfates is able to be achieved.
La présente invention concerne de nouveaux ciments hydrauliques contenant de l'oxyde de magnésium réactif obtenu par calcination à basse température. On peut formuler ces ciments de manière à les adapter à un grand nombre d'applications avec des temps de prise, une résistance et des niveaux de durabilité variés, en ajoutant des sels métalliques, tels que du sulfate ferreux, en les mélangeant à d'autres ciments compatibles à prise rapide, tels que le ciment Portland, ou les deux. Ces compositions peuvent relativement contenir de grandes quantités de ciment pouzzolanique à faible coût, notamment des cendres volantes et des déchets. En outre, ces ciments sont caractérisés par de nombreuses excellentes propriétés, particulièrement une bonne résistance globale aux sulfates.
Borden Ladner Gervais Llp
Tececo Pty Ltd.
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