Therefore, the SEM morphologies of LW-TESCC-50 were characterized, and are demonstrated in Fig. 13.
It can be observed from Fig. 13(a) that both sand and the composite PCM are well distributed in the cement matrix.
Moreover, it can be further seen from both Fig. 13(a) & (b) that the composite PCM is well bonded with the cement matrix.
It shows that the phyllosilicate nature of the vermiculite can ensure good compatibility between the composite PCM and cement matrix.