It is
very obvious that the particle size of Blank cement is quite uneven
compared to the other two samples. Besides, TEA and PC-GA samples
seem sharper and stiffer than Blank sample. These phenomenon
prove that TEA and PC-GA can improve the particle
size distribution of cement. It can also be observed that there are
less fine substance absorbed on PC-GA cement particles than Blank
and TEA sample. Since absorbed fine substance can reduce impact
force during grinding process, this result can be used to explain the
high grinding efficiency of synthesized PC-GA.