This paper presents the volumetric and Marshall Stability characteristics of irradiated waste polyethylene terephthalate fiber-reinforced asphalt mix utilizing the analysis of variance. Exposing polymers to gamma radiation boosts its mechanical and thermal properties which have a direct impact on improving its strength. The influences of irradiated fiber and binder contents on the volumetric and strength properties have been identified via response surface methods (RSM). The RSM was used to determine the optimized contents of irradiated fiber and binder through central composite design (CCD). The results indicate that the interactions between the two independent variables are both influential. The high values of the coefficient of determination (R²) show a good agreement between the actual and predicted values. The numerical optimization elucidates that the optimal irradiated fiber and binder contents were 0.53% and 5.25% respectively. The absolute percent errors between the actual and predicted values were observed to be less than 7% for all the responses.

本文通过方差分析介绍了辐照废聚对苯二甲酸乙二醇酯纤维增强沥青混合料的体积和马歇尔稳定性特征。将聚合物暴露于伽玛射线可增强其机械性能和热性能，从而直接影响其强度的提高。辐射纤维和粘合剂含量对体积和强度性能的影响已通过响应面法（RSM）确定。RSM通过中央复合设计（CCD）用于确定辐照纤维和粘合剂的最佳含量。结果表明，两个自变量之间的相互作用都具有影响力。测定系数的高值（R ²）在实际值和预测值之间显示出良好的一致性。数值优化表明，最佳辐照纤维含量和粘结剂含量分别为0.53％和5.25％。对于所有响应，观察到的实际值和预测值之间的绝对百分比误差均小于7％。