基于水泥稳定碎石抗裂性能不足 ,利用粉煤灰的填充作用和火山灰效应 ,按水泥稳定碎石基层中水泥剂量的 30 %、4 0 %、5 0 %、6 0 %和 70 %等量替代水泥的方法成型了大量水泥粉煤灰稳定碎石基层的试件 ,并进行路用性能试验研究。结果表明 ,粉煤灰按 30 %等量取代的水泥稳定碎石基层具有良好的路用性能 ,尤其是抗裂性能。最后利用扫描电子显微镜对水泥粉煤灰碎石的路用性能形成机理进行了分析 Based on the lack of anti-cracking performance of cement stabilized macadam, with the fly ash filling and volcanic ash effect, according to 30%, 40%, 50%, 60% and 70% of the cement dosage in the cement stabilized macadam Instead of cement, a large number of specimens of cement-flyash stabilized macadam were formed and the road performance test was carried out. The results show that the cement stabilized macadam base with 30% fly ash replaced has good road performance, especially anti-cracking performance. Finally, the formation mechanism of road performance of cement fly ash was analyzed by scanning electron microscope