Heat test (of cement)
From StructuralWiki
A test for determining the constancy of the volume of cement. Pats of cement mortar are made, protected against drying for twenty-four hours, then put in hot water or steam for five hours, after which they are removed and observed for signs of cracking and disintegration. If no such signs appear, the cement has proved satisfactory in respect to soundness. Same as boiling test.
