Table 6.

Average elemental composition (wt.%) of the aggregates in the tested specimens.

	Specimen Marking
	White Inclusions		Brick Crumbles
	N1	N2	N3 Light	N4 Dark
Chemical Element, wt.%:
O	58.22	51.80	50.56	51.57
Si	9.60	10.36	25.34	23.86
Al	2.98	2.17	10.54	8.80
Ca	24.14	29.47	8.95	9.86
Mg	0.97	1.76	1.08	1.16
C	4.11	4.45	-	-
K	-	-	1.20	1.33
Fe	-	-	1.96	2.91
Na	-	-	0.37	0.51
Total, wt.%	100.0	100.0	100.0	100.0