Lime and limestone are extensively used as construction materials and are also important raw materials for many industries. Limestone can be directly processed into stone materials and calcined into quicklime. Lime comes in two main forms: quicklime and slaked lime. The main component of quicklime is...CaO, commonly found in solid, block form, is pure white; however, it can appear pale gray or pale yellow when impurities are present. Quicklime absorbs moisture or reacts with water to become slaked lime, also known as hydrated lime, with the main component being Ca(OH)2. Hydrated lime is mixed to create lime mortar, lime putty, and lime砂浆, serving as coating materials and brick and tile adhesives.。