What should be done to protect test specimens during the curing process?

To protect test specimens during the curing process, covering them with plastic or wet burlap is crucial. This practice helps retain moisture, which is essential for the hydration process of materials like concrete. Proper moisture control prevents rapid evaporation, which could lead to surface cracking and uneven curing. Ensuring that the specimens stay adequately moist will promote a uniform cure, improving the strength and durability of the material being tested.

Keeping specimens in a heated area can over-dry them or cause thermal stresses, while exposure to air can lead to premature drying. Conversely, maintaining them in a chilled environment may slow down the curing process unnecessarily, potentially affecting the final strength and properties of the specimens. Thus, covering the specimens optimally balances moisture retention and temperature control during curing.