Assertion: gypsum's amount | /r/Causes | setting
Facets:
Source sentences:
text: My experiments have shown that reasonable strength may be secured by mixing from, 5% to 75 95% of calcined gypsum with from 95% 'to 5% Portland cement and a necessary amount of water to cause hydration and setting of the mix, and that such strength is favorably comparable with the strength of either materal alone, refrence being made to the following table: