Application Research Of Fly-ash In High-grade Highway In Gansu Province

In the thesis, the different performance of fly-ash is studied in aspects of its application in high-grade highway in Gansu Province. Firstly, the strength tendency of lime fly-ash soil used in the pavement structure at various proportions and different compaction degree is analyzed on the basis of many laboratory tests and constructing test road. And the correlation between influencing factors and compressive strength is obtained through mathematic statistic method. Secondly, an additive coefficient of fly-ash cement concrete that can meet with the technical requirements on cement concrete pavement is provide according to theoretic analysis and experiment. Finally, using fly-ash to replace the mineral filler in asphalt mixture is researched. And the results show that each of technical indexes meets with the requirements of standard specification.