Table 3.

Electrical conductivity values measured in leachates, obtained at different L/S ratios. (Raw: untreated sample; 240 CM: samples treated in the concrete mixer for 240 min; 60–120 Abr.: samples treated in the sieving drum for 60 and 120 min abrasion (Abr.) time respectively).

L/S (L/kg)	Plant A
	Raw	240 CM	Abr. 60	Abr. 120
	(mS/cm)
0.3	19.53 ± 0.31	Not investigated	13.31 ± 0.54	6.64 ± 0.30
1.0	9.63 ± 1.87		5.27 ± 0.57	3.64 ± 0.12
2.0	3.35 ± 0.13		2.47 ± 0.37	1.72 ± 0.10
3.0	2.03 ± 0.07		1.38 ± 0.10	1.03 ± 0.03
4.0	1.53 ± 0.07		0.93 ± 0.03	0.73 ± 0.01
L/S (L/kg)	Plant B
	Raw	240 CM	Abr. 60	Abr. 120
	(mS/cm)
0.3	7.08 ± 1.24	7.40 ± 1.59	4.50 ± 0.35	3.88 ± 0.22
1.0	3.19 ± 0.35	3.73 ± 0.29	2.97 ± 0.16	2.77 ± 0.27
2.0	1.85 ± 0.12	2.00 ± 0.17	1.56 ± 0.07	1.37 ± 0.04
3.0	1.35 ± 0.08	1.24 ± 0.12	1.02 ± 0.02	1.10 ± 0.04
4.0	1.18 ± 0.06	1.07 ± 0.12	0.86 ± 0.19	0.63 ± 0.03