Effect of Metakaolin on Strength and Efflorescence Quantity of Cement-Based Composites

Table 5

Proportion of white efflorescence over total area (unit: %).

Mix	Exposure environment and age in days
	7 days; (NE)	56 days; (NE)	7 days; (CDE)	56 days; (CDE)	7 days; (LTE)	56 days; (LTE)
M0	34.14	47.85	31.85	34.09	44.60	57.04
M5	33.89	42.85	36.57	39.61	36.01	52.94
M10	15.87	34.42	21.90	31.59	20.53	41.38
M15	15.14	20.34	9.25	10.25	15.29	21.71
M20	33.29	35.22	15.88	25.04	28.65	32.27
M25	46.35	49.20	24.24	29.06	30.07	44.06