Used in construction as a key component in cement and mortar, where it hardens by reacting with carbon dioxide in the air. Widely applied in environmental management for flue gas treatment to reduce sulfur emissions from power plants. Serves in water treatment to adjust pH and remove impurities. Employed in the steel industry to remove impurities during the smelting process. Also utilized in the production of paper, glass, and various chemicals. In agriculture, it helps neutralize acidic soils and acts as a disinfectant.