High early strength pozzolan cement blends

Details High early strength pozzolan cement blends High early strength pozzolan cement blends

C - Chemistry, Metallurgy

04

B

C04B 28/22 (2006.01) C04B 28/04 (2006.01) C04B 28/24 (2006.01)

Patent

CA 2739657

A high early strength pozzolan cement includes larger sized pozzolan particles and smaller sized hydraulic cement particles which contain tricalcium silicate (e.g., Portland cement). Particles larger than 10 µm are predominantly (50%, 65%, 75%, 85% or 95%) pozzolan particles, and particles smaller than 10 µm are predominantly (50%, 65%, 75%, 85% or 95%) hydraulic cement particles. Excess calcium from the hydraulic cement forms calcium hydroxide available for reaction with the pozzolan particles, optionally in combination with supplemental lime. At least 30%, 40%, 45%, 55%, 65% or 75% of the pozzolan cement (combined pozzolan and hydraulic cement particles) consists of pozzolan, and less than 70%, 60%, 55%, 45%, 35% or 25% consists of hydraulic cement.

Ciment pouzzolanique à haute résistance initiale comprenant de grosses particules pouzzolaniques et de petites particules de ciment hydraulique lesquelles contiennent du silicate tricalcique (par ex., le ciment Portland). Des particules supérieures à 10 µm sont principalement (50 %, 65 %, 75 %, 85 % ou 95 %) des particules pouzzolaniques et des particules inférieures à 10 µm sont principalement (50 %, 65 %, 75 %, 85 % ou 95 %) des particules de ciment hydraulique. L'excès de calcium du ciment hydraulique forme de l'hydroxyde de calcium disponible pour réagir avec les particules pouzzolaniques, éventuellement en association avec une quantité supplémentaire de chaux. Au moins 30 %, 40 %, 45 %, 55 %, 65 % ou 75 % du ciment pouzzolanique (particules pouzzolaniques et de ciment hydraulique combinées) est constitué de pouzzolane, et moins de 70 %, 60 %, 55 %, 45 %, 35 % ou 25 % est constitué de ciment hydraulique.

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