The Precision Statistical Analysis of Air Voids of Dense-Graded Asphalt Mixture Specimen Measured by Surface Dry Method

摘要

The detecting precision is an important aspect of error control. The Standard scheduled the bituminous mixture type and water absorption level to improve detecting precision. The date statistical analyses of water absorbing capacity water absorption and air voids of practical project are made. The conclusion is that the dispersion of water absorbing capacity and water absorption is obvious because of the existence of discrete values. According the variability analysis of air voids distribution in different level and range of water absorption and different range of air voids, the detecting precision of air voids impacted by the water absorption and how to control the detecting precision of air voids in different water absorption of and air voids range were analyzed. The air voids at different water absorption level or in different water absorption range was preliminary predicted, and calculated the necessary sample numbers in different water absorption range or air voids range for different degree of detecting precision.