Assertion: gypsum's amount | /r/HasProperty | small
Facets:
Source sentences:
text: The reaction of gypsum with (C3A) will retard the setting time of cement (i.e. prolong the setting time), which is necessary for concreting operations to be completed perfectly, if the amount of gypsum is small the setting time will be short, however, addition large amount of gypsum to the clinker during its grinding will delay the harden of the cement paste and producing a large amount of heat during the reaction and solidification of concrete.