【摘要】 二灰碎石已广泛应用于高等级公路工程的基层 ,但在实际应用中 ,二灰用量过多容易产生温缩和干缩裂缝 ,而二灰用量过少又会造成强度不足 ,这与混合料的配合比及级配密切相关。因此 ,如何确定最优配合比和级配是重要的实际问题。南京新机场跑道工程的二灰碎石基层在实施前进行了对比试验 ,得出了具有借鉴价值的优化配合比。实践还证明 ,集料的粗颗粒含量可以适当超出公路规范级配的限定更多还原

【Abstract】 The subbase material mixed with lime, fly-ash and broken stones has been widely used in the highway engineering. It is important to determine the optimum mix proportion and grading of the material. A field test was made before the construction of the runway project of Nanjing International Airport. This paper is a report of obtained results in this experiment.更多还原