Volume 31, Issue 1 (January 2003)
Optimal Quality Characteristic Evaluation for Asphalt Mixing Plants
The development of a quality system for asphalt mixing plants based on original statistical development is the subject of the current investigation. Quantitative evaluation of the quality characteristic under study and distinguishing the quality level for the plant production process have been analyzed. Results for the diagnostic parameter and quality characteristic evaluations (statistical estimations) have been analyzed and compared, employing process capability indices and the control chart method. Quality evaluation of the asphalt mixture produced based on the quality mark (QM) characteristic presented during a previous analysis and corresponding statistical analysis for diagnostic parameters of the presented results and their practical application are discussed. Additional development of the QM characteristic prediction model has been fulfilled and applied in practice. Results presenting the quality mark characteristic behavior with respect to an elaborated general index have been compared with analogous behavior generated using conventional indices for quality mark evaluation. The model presented for quality mark evaluation regarding asphalt mixing plant production and its practical application provides a significant level of efficiency, but requires further development.