By actual examples,the article introduces a new technology in situ measurement of the roadbed compaction density--the additional mass method,and introduces in detail its theory,method and technology,instruments and equipment and its testing results.

Study on the relationship between compact density and compaction energy of CuCr alloys by explosive compaction;

Through analysis on the construction technics and equipment capability of asphalt pavement , the paper points out the respective deviation reasons between the design homogeneity and actual homogeneity of aggregate,temperature and compact density in the asphalt pavement construction.

The experimental results indicate that compacted MSW is a typical heterogeneous porous media and the average air permeability in the horizontal direction ( \-h) is 7 5—20 0 times of that in the vertical direction compacted direction ( v); Air permeability decline with the increase of compacted density exponentiall.

The results indicate that gas permeability Kh,Kv decline with compacted density increment in exponential relation for all three decomposing stage MSW and decline with water conten.

The results showed that the value of the compacted density was a key factor for electrochemical properties of the microencapsulated natural graphite.