Table 6.

Compressive strength of samples subjected to 100 freezing-thawing cycles and for reference material.

	CR		CF
Sample No.	subjected to frost action	reference	subjected to frost action	reference
	Compressive strength [MPa]
1	74.53	69.15	77.71	72.71
2	73.88	72.43	75.31	69.93
3	73.72	73.17	80.44	72.39
4	64.07	70.27	75.05	72.82
5	72.92	69.99	71.73	71.97
6	75.77	73.3	75.16	73.24
Mean value	72.48	71.39	75.90	72.18
Standard deviation	4.23	1.80	2.93	1.18