Microstructure Characteristics of GFRP Reinforcing Bars in Harsh Environment

Table 8

Results of moisture uptake of GFRP reinforcing bars.

Reference	Unconditioned		Conditioned				Within high durability limits
	Uptake (%)	Medium	Temperature (°C)	Time (days)	Sustained load	Uptake (%)	ACI 440.6 [62]	CSA S807 [63]
[7]	0.10	Water	80	58		1.80	Not Acceptable	Not Acceptable
[8]	0.23–1.15	Alkaline	50	21		0.25–1.36	Not Acceptable	Not Acceptable
[9]	0.00	Concrete	50	Saturation		0.44	Acceptable	Acceptable
[10]	0.10	Concrete	60	450		1.23–1.50	Not Acceptable	Not Acceptable
[11]	0.10	Concrete	60	288 & 372	x	1.95–2.54	Not Acceptable	Not Acceptable
[12]	0.05	Concrete	60	48.2	x	0.50	Acceptable	Acceptable
[23]	0.23–1.15	Alkaline	60	208.3		0.25–1.36	Not Acceptable	Not Acceptable
[42]	0.00	Seawater	65	365		5.10	Not Acceptable	Not Acceptable
[24]	0.02–0.15	Water	23	Saturation		0.20	Acceptable	Acceptable
[27]	0.05–1.59	Alkaline	50	21		0.06–1.63	Not Acceptable	Not Acceptable
[32]	0.01	Alkaline	60	720		0.74	Acceptable	Not Acceptable
[35]	0.37	Concrete	50	30	x	0.57	Acceptable	Acceptable
[40]	0.40	Alkaline	50	94		1.20	Not Acceptable	Not Acceptable
[44]	0.00	Alkaline	22	16.67		0.55	Acceptable	Acceptable
[46]	0.00	Alkaline	60	360.4	x	1.10	Not Acceptable	Not Acceptable
[48]	0.01	Alkaline	60	176		0.38	Acceptable	Acceptable