Calcium hydroxide
Calcium hydroxide, also known as slaked lime, is a chemical compound with the formula Ca(OH)2. It dissolves slightly in water. It is a base. It can be made by the chloralkali process. It can be dehydrated (remove the water) to calcium oxide by heat. It can be used to neutralize acidic soils.
Calcium Hydroxide Media
SEM image of fractured hardened cement paste, showing plates of calcium hydroxide and needles of ettringite (micron scale)