集料吸水率对沥青混合料最佳油石比的影响

Effects of Specific Absorption of Aggregate on Optimum Proportion of Asphalt

试验时发现集料吸水率对沥青混合料最佳油石比有着较大的影响。采用正交试验方法分析集料吸水率、纤维用量、水泥掺量及成型温度这4个因素对沥青混合料最佳油石比的影响程度。试验结果表明:在4个因素中,纤维用量对沥青混合料最佳油石比的影响最大,而集料吸水率的影响有所减弱。通过验证试验得出:沥青混合料中添加纤维能有效地减小集料吸水率的波动对沥青混合料最佳油石比的影响。

The fact that specific absorption of aggregate has important effects on the optimum proportion of asphalt is detected by the tests. The 4 factors, such as specific absorption of aggregate, dosage of fiber, dosage of cement and molding temperature, were assembled properly by orthogonal design method, the effects of the factors on the optimum proportion of asphalt were studied at the same time. The results of the test indicate that the dosage of fiber in asphalt mixture is the most important factor in the 4 factors and the effect of specific absorption of aggregate is weakened at the same time. Verifying test indicates adding fiber into asphalt mixture can weaken the effect of specific absorption of aggregate on the optimum proportion of asphalt.