It is emphatically introduced the technical plan about the process forming coarse specification raw silk of 150dtex(130/140D)in one time during reeling with the modified conjugated yarn equipment of FDF 01 by the use of mulberry cocoon as raw materials.

In order to investigate the influence of aggregate gradation on skeleton structure of asphalt macadam base,the exponential value method and uniform design method were applied to analyze the relationship between coarse aggregates relative proportion and the voids in the coarse aggregate [VCADRC] of asphalt macadam base.

In order to avoid gravity segregation and retain reasonable workability and homogeneity of fresh concrete mixtures,the volume fraction of the coarse aggregate in ordinary plastic concrete must be kept at a low level,and most of the coarse aggregates must be suspended in the mortar even if there are some contacts among them.

Seven different coarse aggregates are selected in this paper and its basic physical and mechanical capabilities are measured according to the criterion.

The influences of rough aggregate on mechanical properties of concrete;