粉煤灰用于道路基层,量大面广。因此,大力推广粉煤灰铺筑路面基层,对综合开发粉煤灰资源,改善城市环境污染状况,具有重要意义。由于石灰和粉煤灰的火山灰反应长达10年之久,因此,粉煤灰混合料突出的特性是后期强度高,这与公路交通量增长的特点是一致的。粉煤灰有较好的重塑性,因此,有一定的裂缝愈合能力。粉煤灰 Fly ash is used in road bases and is widely used. Therefore, it is of great significance to vigorously promote the use of fly ash to build pavement bases for the comprehensive development of fly ash resources and improve the environmental pollution in cities. Since lime and fly ash have a volcanic ash reaction for as long as 10 years, the prominent feature of fly ash mixture is high strength in the later period, which is consistent with the characteristics of the increase in road traffic volume. Fly ash has good re-plasticity, so it has a certain ability to crack healing. Fly ash