Variation characteristics of the grain size distribution of gravel by rotary crushing and mixing method focused on single particle strength test

摘要

The characteristic of crushing by twister method is investigated using single particle strength test. The main conclusions are asfollows(1) The crushing pattern and strength of particles were found. It is thought to be an important factor in crushing tests using twistermethod.(2) A variety of stresses in the particles have been confirmed through the degree of scattering.(3) Crushing stress defined can be predicted according to particle size shown Fig 4. ğœ_ğ¶ depend on not only ğ·50, but also thequality of mother materials consisted.(4) The samples did not satisfy the JGS standard. Samples after crushing became well-graded gravel using twister method.In the future, the factors that change according to the number of rotation and their crush mechanism will be studied. And therelationship between the characteristics of the particles obtained in this study and the twister method will be examined.