Industrial versus Laboratory Clinker Processing Using Grinding Aids (Scale Effect)

Table 5

Ec and cement properties following laboratory grinding.

	Control cement		Cement with glycol-based GA at 530 g/ton		Cement with amine-based GA at 460 g/ton
Test number	1	2	1	2	1	2
Ec, kWh/ton	43.27	43.27	39.6	38.87	40.33	40.33
	43.27 (0%)		39.23 (1.31%)		40.33 (0%)
Blaine, cm^2/g	3870	3825	3810	3775	3880	3790
	3848 (0.82%)		3792 (0.65%)		3835 (1.66%)
R-90, %	5.8	5.3	6.7	7.4	5.7	6.4
	5.55 (6.37%)		7.05 (7.02%)		6.05 (8.2%)
R-45, %	18.3	17.7	23	23.3	19.6	22
	18 (2.36%)		23.15 (0.91%)		20.8 (8.16%)
	0.893	0.888	0.782	0.81	0.748	0.771
	0.891 (0.39%)		0.796 (2.48%)		0.759 (2.14%)
, m	23.5	25.1	27.8	26.92	29	25.8
	24.3 (4.65%)		27.35 (2.32%)		27.4 (8.26%)
Water demand, %	27.7	27.8	27.9	27.5	27.7	27.3
	27.75 (0.25%)		27.7 (1.02%)		27.5 (1.03%)
Final setting, min	210	215	225	215	205	190
	212.5 (1.7%)		220 (3.21%)		197.5 (5.37%)
1-day compression, MPa	14.3	14.7	16.3	15.9	17	15.8
	14.5 (1.95%)		16.1 (1.75%)		16.4 (5.17%)
28-day compression, MPa	46.4	44.8	42	44.2	54.3	49.2
	45.6 (2.48%)		43.1 (3.61%)		51.7 (6.97%)

The mean of two values is considered for analysis. The COV is given between parentheses.