Table 1. Compressive and Flexural Strength of Cement Mortars Containing HO-G or GO at days 3 and 28.

	day 3		day 28
samples	compressive strengtha Mean (MPa)/changeb (%)	flexural strengtha Mean (MPa)/changeb (%)	compressive strengtha Mean (MPa)/changeb (%)	flexural strengtha Mean (MPa)/changeb (%)
A0	31.8 ± 1.3/0	5.2 ± 0.17/0	50.5 ± 0.78/0	11.4 ± 0.22/0
B0.01	33.7 ± 1.23/+5.97	5.5 ± 0.26/+5.77	57.9 ± 1.42/+14.65	12.3 ± 0.17/+7.89
B0.03	36.7 ± 0.79/+15.41	6.2 ± 0.26/+19.23	60.4 ± 0.75/+19.60	13.4 ± 0.11/+17.54
B0.05	33.8 ± 0.36/+6.29	6.5 ± 0.06/+25	58.7 ± 1.06/+16.24	13.5 ± 0.3/+18.42
B0.07	31.9 ± 0.82/+0.31	6.1 ± 0.24/+17.31	54.9 ± 0.82/+8.71	12.7 ± 0.35/+11.40
B0.09	29.2 ± 1.25/–8.18	5.4 ± 0.17/+3.85	49.9 ± 0.67/–1.18	12.2 ± 0.08/+7.01
C0.005	33.9 ± 0.79/+6.6	5.5 ± 0.13/+5.77	56.2 ± 0.52/+11.29	11.9 ± 0.17/+4.39
C0.01	36.4 ± 0.44/+14.47	5.4 ± 0.36/+3.85	59.9 ± 0.66/+18.61	12.1 ± 0.25/+6.14
C0.03	40.9 ± 1.56/+28.62	5.4 ± 0.2/+3.85	61.2 ± 0.26/+21.19	12.3 ± 0.13/+7.89
C0.05	35.8 ± 0.95/+12.58	5.2 ± 0.18/+0	57.9 ± 0.44/+14.65	11.9 ± 0.2/+4.39
C0.07	32.6 ± 0.36/+2.52	5.1 ± 0.2/–1.92	52.4 ± 0.72/+3.76	11.7 ± 0.17/+2.63
C0.09	32.1 ± 0.82/+0.94	4.8 ± 0.26/–7.69	48.6 ± 0.2/–3.76	11.3 ± 0.2/–0.88

^{a Mean}± standard deviation (SD).

^bCompared to A₀.