Sodium Sulphate Effect on Cement Produced with Building Stone Waste

Table 8

Compressive and flexural strength data of the specimens which were cured for 7, 28, or 56 days.

Experiments	Specimen ages (days)	The specimens exposed to water
		RC	DC1	DC2	DC3	AC1	AC2	AC3	MC1	MC2	MC3
Compressive strength (N/mm^2)	7	28.5	27.1	26.05	17.41	20.0	16.0	11.7	18.50	17.2	12.90
	28	47.4	41.4	41.00	31.55	32.2	26.2	19.2	31.80	27.1	19.75
	56	49.7	43.7	43.85	34.25	34.9	28.7	22.0	34.55	29.7	22.50
Flexural strength (N/mm^2)	7	4.31	4.27	4.51	3.69	3.16	3.11	2.42	3.1	3.08	2.35
	28	7.56	7.63	6.30	6.02	5.84	4.80	3.60	4.8	3.90	2.95
	56	8.59	8.37	7.55	6.80	6.61	5.40	4.70	5.6	5.32	4.79