If a mixture needs reheating prior to compaction, best practice is to reheat inside the specimen mold.

• A. True
• B. Not applicable
• C. It depends on the binder
• D. False

Answer: (D)

Reheating should be done outside the specimen mold in a controlled environment so the material reaches the correct compaction temperature uniformly without applying pressure. Heating inside the mold is not advised because it can create uneven heat distribution, over-soften or drain the binder, and distort the mold or specimen under pressure. This can lead to inaccurate density, air voids, and stability results. The proper approach is to reheat the mixture in a controlled oven or bath to the required temperature, then promptly place it into the mold and compact while hot. The method isn’t dependent on the binder type; reheating inside the mold just introduces risks to accuracy and mold integrity. Therefore, the statement is not best practice.