Unique Uses:

Dentistry:

In dentistry, specifically the field of endodontics, the compound calcium hydroxide is extremely useful. The compound was first introduced by BW Herrman in 1920 and has been most useful in the last 40 years. Calcium hydroxide is used mainly to combat bacteria infecting a root canal, though it isn't categorized as a complete antiseptic. Calcium hydroxide is used mainly in a/n solution/epoxy with a water base. At room temperature, there is less than 0.2% of the calcium hydroxide dissolved (in water) in the form of calcium and hydroxide ions. When applying the solution to a tooth as an antiseptic, it is most advantageous to apply it for a time period between 24 hours and a week.

Concrete and Ancient Roman Architecture:

It is a well known fact that today lime is used in many concrete projects, but it is interesting to note that even in the time of the Romans, calcium hydroxide was used, and in such a way as to preserve the concrete for more than 2,000 years in near-perfect condition. Regular cheap concrete is comprised mainly of wet lime and sand, but it was the special recipe of wet lime and pozzolan ash from a volcano along with rock that kept the cement so strong. The reasons behind this lie in the atomic structures of sand vs. pozzolan ash. Pozzolan ash is relatively shapeless and unstructured, allowing the wet lime to react and form a concrete gel, capable of gluing together pieces of rock extremely solidly.
Water Purification and Treatment


Calcium Hydroxide is a commonly used purification utensil. It is used to soften, and neutralize acid in the water supply. It is also used to remove certain impurities, including silica. Calcium hydroxide is infused into the water after calcium carbonate is dissolved in the water by carbonic acid. the calcium hydroxide remains in the system until it is filtered out in the final steps of water purification.

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