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questions :obtaining tricalcium silicate
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[Visitor (112.0.*.*)]answers [Chinese ]Time :2022-06-03
The hydration process of tricalcium silicate is divided into five stages: pre-induction (15min), induction phase, acceleration phase, recession period, and stabilization phase.

Pre-induction: a sharp chemical reaction occurs immediately after the addition of water, but the duration is shorter and ends within 15min.

Induction period: the reaction rate is extremely slow, lasting 2 to 4 hours (the cement slurry remains plastic). The initial coagulation time is basically equivalent to the end of the induction period.

Acceleration period: The reaction is accelerated again, the reaction rate increases over time, and a second exothermic peak appears. At the peak, this stage ends (4 to 8h), at which time the final condensation time has passed, and the cement stone begins to harden.

Deceleration period: hydration decay period, the reaction rate decreases with time (12~24h), and the hydration is gradually controlled by the diffusion rate.
Stabilization period: the reaction rate is very low, the reaction process tends to be stable, and the hydration is completely controlled by the diffusion rate.

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