put course aggregate into mold first, then push binder into bottum of mold by a pipe, which cause less binder amount in concrete compare to norml concrete.
Thank you for your question...
First you have to look for many aspects...
What about shrinkage
What about Elasticity
What about could joint
Thank you again...
The main disadvantage of Two stage concrete is the lack of equipment required to inject the mortar with pre placed aggregate. In addition, the highly workable mortar is difficult to handle on site for the non-technical labor, which results in wastage of mortar.
First of all, you should realize some important aspect which is already exist in the concrete firs you have to pay attention to the placement process and joint, shrinkage, and aspects elasticity.
Feng Jin Thanks for sharing such a detailed document. I will go through it.
FYI
Sorry， 2015-Experimental study of the interfacial transition zone (ITZ) of model rock-filled concrete.pdf and 2014-Experimental study of filling capacity of self-compacting concrete and its influence on the properties of rock-filled concrete.pdf cannot upload due to restriction of copyright.
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