# Complex Method of Airfield Pavement Condition Evaluation Based on APCI Index
## 6 Conclusions  
Nowadays, there are many methods and procedures for the evaluation of airfield pavements condition. In the introduction section, a few of them are described. Unfortunately, there are only a few procedures that describe the condition of pavement in a more complex way. The most frequent method used for pavement condition assessment is the PCI procedure. This method is used by, e.g., the U.S. Army Corps of Engineers and is popular among engineering and government institutions. However, it is based only on observed surface damages and skips such parameters as load capacity, anti-skid properties, and evenness or structural properties, which are especially important at the airfields where \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Condition** & **APCIG** & **APCIF** & **APCIwG** & **APCIwF** & **APCINN** \\ \hline Good & 73 \(\div\) 100 & 70 \(\div\) 100 & 72 \(\div\) 100 & 72 \(\div\) 100 & 71 \(\div\) 100 \\ Satisfactory & 41 \(\div\) 72 & 36 \(\div\) 69 & 40 \(\div\) 71 & 39 \(\div\) 71 & 38 \(\div\) 70 \\ Bad & 0 \(\div\) 40 & 0 \(\div\) 35 & 0 \(\div\) 39 & 0 \(\div\) 38 & 0 \(\div\) 37 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Criteria for assessing the technical condition of natural pavements of airfield functional element based on the APCINN. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Condition** & **APCINN** & **Definition** \\ \hline Good & 71 \(\div\) 100 & The pavement is in good technical condition, has a small or no damage and requires only routine maintenance works. \\ \hline Satisfactory & 38 \(\div\) 70 & The pavement is in a sufficient technical condition, has damage with low and medium harm. In a short time, routine and more serious repairs should be carried out. \\ \hline Bad & 0 \(\div\) 37 & The pavement is in poor technical condition, has damage to high harmfulness that causes operational problems. Maintenance work should include immediate repairs and reconstructions. \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Criteria for assessing the technical condition of the natural pavement of airfield functional element. jet aircrafts operate. Non-reference to the above parameters prevents reliable assessment of the real technical condition of the airfield pavement. The management of airfield pavements should take place in a responsible manner. It should be based on reliable information on the technical condition of the pavement. Only this approach enables rational cost planning and managing of resources. The main goal of the paper was to present a complex approach to technical condition assessment of airfield pavements made in cement concrete and asphalt concrete, as well as natural pavements which are part of the ground maneuvering field on each airfield object. The authors proposed a new methodology, which gives a reliable tool for airport pavements management. The developed method is based on Airfield Pavement Condition Index and includes parameters that describe not only surface damages but also conducted repairs, load capacity of pavement construction, anti-skid properties, evenness and bond strength of the surface layer. This approach gives a much wider view of actual condition of airfield pavement. Each of the parameters is obtained in a standardized test. Presented mathematical models enable automation of the pavement assessment process. That can lower costs and speed up the whole evaluation. Moreover, presented weights can be changed in future to fit the method to specific conditions met at specific airfield pavements. In future projects authors, will try to use artificial intelligence to define the weights of model parameters based on test results obtained in years of previous and future research. Authors conduct advanced works on atmospheric corrosion impact on pavement degradation. The results of works can be used for pavement condition evaluation in the context of its durability. In the future, authors would like to use artificial intelligence for model optimization, in particular, to optimize the accepted weights of each parameter.