Calcium oxide, whose formula is CaO, and its product of interaction with (H2O) water - Ca (OH) 2 ("fluff," or hydrated lime) are widely used in the construction industry.
Calcium oxide kabani ifomula Cao, futhi ukusabela umkhiqizo wawo nge (H2O) amanzi - Ca (OH) 2 ("pushonka" noma slaked lime) baye bathola isicelo ebanzi ekuhwebeni isakhiwo.