What temperature range should a drying oven be set at for aggregate testing?

For aggregate testing, the correct temperature range for a drying oven is 230 ± 9 degrees Fahrenheit. This specific range is established to ensure that the aggregates are adequately dried without thermal damage that may occur at higher temperatures.

Drying aggregates at this temperature helps in achieving consistent moisture content measurements, which is crucial for determining the proper mix and properties of the concrete or asphalt produced. The use of 230 degrees Fahrenheit allows for a balance between effectively removing moisture and preventing unnecessary alteration of the physical properties of the aggregates, such as loss of strength or changes in gradation, which could affect overall performance.

Other temperatures, while potentially effective, may not conform to the standardized methods established in testing protocols, leading to susceptibility of test results to inaccuracies.