Assertion: gypsum's effect | /r/CapableOf | show definite reduction
Facets:
value: for two portland cements
type: OTHER
Source sentences:
text: The effects of increased sulfate content (total SO 3 2.26%–5.26%) on the early compressive strength of concrete cubes at up to 56 days were examined and showed a definite reduction at levels of SO 3 above 4.0% for two Portland cements (3.8% and 8.9% C 3 A, 2.34 and 2.76%