Where does hydration collide?

In cement chemistry, hydration is the set of chemical reactions in which the anhydrous minerals of cement react with water to form new hydrated phases, chiefly calcium-silicate-hydrate and calcium hydroxide, whose interlocking growth is what makes a paste set and harden. Taylor's Cement chemistry details these reactions and the microstructure they build. The referent is the chemical incorporation of water into new solid phases, measured by degree of hydration and heat released, and it is a distinct construct from a baker's water ratio or a body's fluid balance, sharing only the word.[1]

Unit

The degree of hydration: fraction of cement reacted with water

Recovery means

Not applicable

Measured by

Followed by the heat of hydration, bound water content, and the degree of reaction over time

In physiology, hydration is the body's state of water balance, the match between fluid taken in and fluid lost through sweat, urine, and respiration, with dehydration the deficit that impairs performance and thermoregulation. The American College of Sports Medicine position stand on exercise and fluid replacement (Sawka et al., 2007) sets out how to gauge and maintain this balance around exercise. The referent is whole-body water status relative to need, tracked by body-mass change and urine or plasma markers, and it is its own construct apart from cement reacting with water or flour absorbing it.[2]

Unit

Body water status relative to need, as a fluid deficit or balance

Recovery means

Fluid intake restores balance; rehydration reverses a deficit

Measured by

Estimated from acute body-mass change, urine specific gravity or osmolality, and plasma osmolality