Thermal and Mechanical Properties of Geopolymers Exposed to High Temperature: A Literature Review

Table 1

Effects of different measures on thermal contraction.

Researchers	Villaquirán-Caicedo et al. [26]	Vickers et al. [51]	Kovářík et al. [52]	Rovnaník and Šafránková [53]
Raw materials	MK	FA	Clay and MK	MK and FA
Method	Adding RHA and silica fume.	Adding silica ash and aluminum base type filler.	Adding ceramic particle material.	Choosing chamotte as the thermally stable aggregate of mortar.
Conclusions	The geopolymer curve with silica fume is gentler, while the thermal shrinkage of geopolymers added with boiler slag is obvious.	The addition of filler can reduce the thermal shrinkage of geopolymers, and the effect of adding silica fume is better.	The higher content of fine ceramic particles can improve the thermal shrinkage of geopolymers.	The thermal shrinkage of MK paste is much larger than FA paste, but the difference of mortar is small.