highly significantP < 0.05
When P < 0.01, it is highly significant; when P < 0.05, it is significant; when P > 0.05, it is not significant: RA replacement rate ( P = 0.005 < 0.01): Highly significant, indicating that the RA properties are the core variable determining the performance of RAC; NC content ( P = 0.028 < 0.05): Significant, suggesting that NC has a statistically reliable optimization effect on the performance of RAC; Water gel ratio ( P = 0.083 > 0.05): Not significant, indicating that within the range of 0.35–0.45, the influence of the water gel ratio can be compensated by the combined effect of NC and RA.