高性能二灰稳定碎石混合料设计和路用性能研究

Research on Mixture Design and Pavement Performance of High Performance Lime Fly-ash Stabilized Aggregate

为制备高性能二灰稳定碎石混合料,采用体积法对不同类型的二灰稳定碎石混合料进行了配合比设计,并通过无侧限抗压强度试验和劈裂强度试验对其进行了路用性能研究。结果表明:激活剂的加入使得二灰稳定碎石混合料的抗压强度、劈裂强度和抗压回弹模量均有大幅度的增长,并且能提高其抗冲刷性能,但抗温缩性能略有降低。

In order to prepare high performance lime fly-ash stabilized aggregate, different types of mixtures were designed with volume method, and pavement performance including strength, stiffness, anti-shrinkage and anti-erosion properties were studied. The results show that compressive strength, splitting tensile strength and compressive modulus of lime fly-ash stabilized aggregate can be greatly increased by adding activator. Lime fly ash stabilized aggregate with activator has better anti-erosion properties than the conventional one. And activator has little effect on anti-dry shrinkage properties of lime fly-ash stabilized aggregate, but it can decrease slightly the anti-temperature shrinkage performance.