粉煤灰在路面底基层中的应用

Application of Fly Ash in Subbase of Pavement

粉煤灰已广泛用于高速公路的路基及高等级路面的基层和底基层,特别是底基层结构形式多采用石灰、粉煤灰稳定细粒土(简称二灰土),取代了以前较常用的石灰稳定土,进一步提高了工程质量和道路的使用品质。

Fly Ash has been widely used in expressway＇s roadbed, as well as base and subbase of high-grade pavement. Especially, the subbase structures usually adopt lime and fly ash stabilized fine-grain soil（lime-ash soil for short） to replace previous common lime stabilized soil, that improves the engineering quality and service quality of road further.