RESEARCH ON COMPACTION CHARACTERISTICS OF AEOLIAN SAND IN THE VIEW OF GRANULAR MATTER

We took aeolian sand as a kind of granular matter and studied its compaction characteristics in the view of guraular matter. According to the results of the laboratory compaction test,a compaction curve was plotted which was quite different from the clays and was similiar to double hump in shape. The two peaks in the curve meant that aeolian sand can be well-compacted whether it was dry or contented some water and water played different parts in the compaction process.and according to the results of vibrating compaction test,we can know that it was vibration acceleration and vibration time that affected the transform between Brazil-nut effects and anti-Brazil-nut effects,which also affected the compaction density. there were optimization values for both vibration acceleration and vibration time in that condition a optimized compaction density can be acquired. Also,field compaction tests were carride out(the amplitude of the machine was 0.4mm and the frequency was 48 Hertz). When the roadbed was compacted 5 times the degree of compaction was 96.8% and the value of CBR was 25.3 which were quite acceptable in the Specifications For Design Of Highway Subgrades.