What is the maximum size permitted for GMM samples when cooled?

The maximum size permitted for GMM (Gyratory Compactor Method) samples when cooled is 1/4". This specification is important because it ensures that the sample sizes maintain consistency and accuracy in testing, which is crucial for assessing the characteristics of the asphalt mixture.

Larger sample sizes could introduce variability and potential inaccuracies in measurement and testing results. By restricting the size to 1/4", the methodology supports uniformity and reliability, enabling quality control processes to function effectively. Additionally, smaller samples are easier to handle and allow for more precise laboratory analysis, minimizing the risk of errors during the testing process.

Understanding these parameters helps in compliance with the standards set forth by agencies like FDOT and promotes higher quality in asphalt production and performance evaluation.