Assertion: mortar's cement | /r/HasProperty | mixed with water
Facets:
value: to form a hard structure
type: PURPOSE
Source sentences:
text: Cement undergoes chemical changes when mixed with water to form a hard structure.
text: Cement undergoes a chemical reaction when mixed with water, called hydration.
text: Cement starts to set when mixed with water, which causes a series of hydration chemical reactions.