Mechanical Performance and Numerical Simulation of Basalt Fiber Reinforced Concrete (BFRC) Using Double-K Fracture Model and Virtual Crack Closure Technique (VCCT)

Table 4

Properties of air entraining admixture.

Test	Dosage (%)	Water reducing rate (%)	Air content (%)	Ratio of bleeding rate (%)	1 h change in air content (mm)	Setting time difference (min)		Compressive strength ratio (%)
						Initial setting	Final setting	3 d	7 d	28 d
Result	0.04	6.0	5.2	53	1.2	35	26	116	102	96
Specification	0.02∼0.05	≥6	4.5∼5.5	≤70	−1.5∼+1.5	−90∼+120	−90∼+120	≥90	≥90	≥85