Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Visual appearance of as-collected raw materials (top image) and their particle appearance obtained with SEM (bottom image) used for morphological comparison: (a) red mud (RM), (b) fly ash (FA), (c) limestone (LS), (d) clay (C), (e) slag (SL).
