Microstructure Characteristics of GFRP Reinforcing Bars in Harsh Environment

Table 1

Summary of standardized testing for physical properties.

Property (unit)	Standardized test	Reference
Diameter (mm)	ACI 440.3R & ASTM D7205	[3, 16]
Void content (%)	ASTM D3171 & ASTM D2734	[17, 18]
Fiber content, by mass (%)	ASTM D3171 & ASTM E1868	[17, 19]
Moisture uptake (%)	ASTM D570	[20]
Glass transition temperature (°C)	ASTM E1356	[21]
Thermal expansion coefficient (/°C)	ASTM E831	[22]