Table 3.

Descriptive statistics from Kruskal–Wallis tests (MPa versus Cement layer).

Immediate				After Aging
Cement (µm)	Median	Mean Rank	Z-Value	Cement (µm)	Median	Mean Rank	Z-Value
60	9.19	32.5	0.61	60	6.08	35.9	1.69
120	7.52	27.1	−1.06	120	5.54	33.5	0.94
180	9.45	31.9	0.45	180	2.69	22.1	−2.63
Overall		30.5		Overall		30.5