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1Angus_Cement
Term | Definition |
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Portland cement | is a hydraulic cement that hardens in water to form a water-resistant compound |
Hydration | The setting and hardening of concrete are the result of chemical and physical processes that take place between Portland cement and water |
C-S-H | is believed to be the material governing concrete strength. |
Structure of C-S-H | It has amorphous structure making up of poorly organized layers and is called glue gel binder |
CH | This product is a hexagonal crystal often forming stacks of plates. |
Pre-induction period (Hydration) | Initial hydrolysis; dissolution of ions |
Induction period (Hydration) | Continued dissolution of ions |
Acceleration (Hydration) | Initial formation of hydration products |
Deceleration (Hydration) | Continued formation of hydration products |
Steady State (Hydration) | Slow formation of hydration products |
Setting | refers to the stiffening of the cement paste or the change from a plastic state to a solid state |
Initial set | indicates the beginning of forming of gel or beginning of solidification |
Final set | It represents approximately the time after which strength develops at a significant rate |
False set | is the name given to the abnormal premature stiffening of cement within a few minutes of mixing with water |