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本文着重研究了骨料最大粒径为４０ｍｍ的二级配钢纤维混凝土的抗折疲劳性能，得出了钢纤维含量对疲劳强度以及变形和裂缝在疲劳过程中变化的影响规律，提出了可用于路面工程设计的疲劳方程。由于采用较长钢纤维配制的二级配钢纤维混凝土具有常规一级配钢纤维混凝土相同的疲劳性能，且具有水泥用量低、收缩小、耐磨性好的优点，因而在路面工程中具有广泛的应用前景。
This paper focuses on the study of the flexural fatigue properties of the secondary steel-fiber reinforced concrete with the maximum aggregate size of 40mm. The influence of the steel fiber content on the fatigue strength and the variation of the deformation and cracks in the fatigue process is obtained. The fatigue equation of pavement engineering design. The secondary steel-fiber reinforced concrete with the longer steel fiber has the same fatigue properties as the conventional primary-grade steel fiber reinforced concrete and has the advantages of low cement content, small shrinkage and good abrasion resistance and thus has wide application in pavement engineering The application prospects.