Research Article
Modelling of Asphalt’s Adhesive Behaviour Using Classification and Regression Tree (CART) Analysis
Table 2
Variables used in the model.
| Variable | Explanation |
| Fresh | Binary variable: 1 for fresh samples or otherwise 0 | Si3N4, NH3, OH, CH3 | Binary variables for tip type: 1 for a specific tip type or otherwise 0. Tip type is 0 for COOH | SB4, SB5, SBS4, SBS5 | Binary variables for binder type: 1 for a specific binder type or otherwise 0 | CNT% | % of carbon nanotubes | SWNT (or CNT) | Binary variable for CNT type: 1 for SWNT type and 0 for MWNT type |
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