Baseline Moisture Resistance of PWP Cement Composite Boards Reinforced with Internal Glass Fiber Reinforcement under Accelerated Wet-Dry Aging

Table 1

Physical properties and chemical composition.

(a) Chemical composition (%)

Materials	Al2O3	CaO	SiO2	Fe2O3	MgO	K2O	SO3
Portland cement	2.56	70.85	11.59	4.40	1.17	1.37	4.20
PWP	0.28	16.84	1.42	0.71	0.68	2.70	0.82

(b) Physical properties

Materials	Specific gravity	Moisture content; (% weight)	(% weight); Loss on ignition	pH
Portland cement	3.15	0.34	1.05	12
PWP	1.56	2.92	74.7	8