Lime, Fly Ash Stabilized Natural Gravel Grassroots Structure Of The Applied Technology Research

In this paper, material composite design of the structure composed by soil-lime-flyash stabilized base course and the construction technics and the performance of this kind of structure were studied systematically. First in allusion to the characteristic of its components, the physics-mechanics characteristic and the strength mechanism were discussed in detail by using the chemical theory of ion exchange. On the basis of these results, the design method and procedure of lime-flyash grit composite were researched combining with the standard. Through the engineering practice of recent ten years, some modification were made as follows: the maximum size of the granular material was improved from 4cm to 10~12cm, the mud content rises to 7 percent from 3 percent, the strength was raised, also the construction became more convenient. And besides, according to the real instance of pavement technics in our city and the local material resource, we compiled the detailed construction technics. At last, the good performance of this structure was discussed, and the technical-economic analysis was made at the same time. The achievements of this paper has important reference value to instruct the design and construction of lime-flyash base structure in our city even in the other areas.