What is the required temperature to dry the extracted aggregate to a constant weight?

• A. 230 ± 9 F
• B. 200 ± 5 F
• C. 240 ± 10 F
• D. 220 ± 8 F

Answer: (A)

The required temperature to dry the extracted aggregate to a constant weight is set at 230 ± 9°F. This specification is based on standards that ensure the aggregates are dried sufficiently to remove moisture while minimizing the risk of damaging the material or altering its properties.

The upper and lower limits around this temperature provide a range that allows for some flexibility in operational settings, accounting for variations in equipment and environmental conditions. Ensuring that the temperature stays within this specified range is critical because too high a temperature could lead to the degradation of the aggregate material, while too low a temperature might not adequately remove moisture, affecting accuracy in subsequent testing or applications.

Thus, this choice reflects the industry-standard practice to maintain quality and consistency when determining the moisture content in aggregate materials.