The Research Of Improving Lime Fly-ash Stabilized Crushed Stone Pavement Performance

This thesis is to deliver some conclusions after a lot of experiments on lime fly ash stabilized aggregate base course:This thesis has a general study of the mechanics property and pavement performance of the lime fly ash aggregate base courses in the view of the properties of the raw materials and the requirements for their application,the gradation and the ratio of aggregate,the mechanism for its strength,and the addictives influence on the strength.this thesis also compares the properties of the aggregates,single size or continuous gradation.then the thesis proposes the design method of embedded skeleton desith structure of lime fly ash stabilized aggregate mixtures.In the study of the interaction between the lime fly ash and aggregate,the thesis argues that the strength changes with the change of the aggregate gradation and the ratio of the materials,and the smaller the graded size and the ratio of lime-fly-ash to other materials are,the weaker the strength is,and this results in the weaker ability of anti-crushing,anti-water-erosion and anti-brushing.In the experiment where mixtures is added addictives,the thesis proposes that the strength of lime-fly-ash aggregate is inproved at the early periods when it is added addictives.The thesis also explores the construction quality control and test on lime fly ash aggregate base courses.Also the thesis compares the ways for them economically,the cost of lime ash fly stabilized aggregate is lower.