Abstract
Typically, the selection of large aggregate particle size is mainly determined by the thickness of structures and the thickness of protective layer. The greater the aggregate diameter is, the smaller the specific surface is, and the smaller coating materials demand will be without specific requirements. It will affect the concrete flowability directly if there are too much big size of aggregates or the particle size is too big for forming a certain stable packing skeleton structure. The strength of the large diameter recycled self-compacting rock-fill concrete is low so that the primary cause of its failure mechanism is bond failure and bond slip in aggregate. Shear failure in aggregate is not easy to happen due to the strength of the aggregate is too low. For this reason, we put forward the general selection requirements for large diameter aggregate.
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