[vnuEndru]

Hi VNU ...

Hi,
Yes, you right, as far as I know young modulus correlates with compressive strength in uhpc, so I use compressive strength as indirect indicator for young modulus for now. I will incorporate some alumina aggregate and test for young modulus next ofc. Unfortunately I don't have any mixtures commercially available in my country. The only options is import (which is very expensive) or diy.
Silica fume is not the same as fumed silica. Silica fume is pozzolanic supplementary cementitious material which is usually used in all this commercial mixtures such as ducrete to achieve theirs superb characteristics. There are others pozzolan like metakaolin, but as far as I know SF is the most efficient. I know about dangers of working with materials like SF. I do my best in safety regards.