Study on Cracking Resistance of Basalt Fiber-Reinforced Microbond Asphalt Macadam

Table 4

Performance indices and test results of basalt fibers.

Test item	Technical requirement	Measured value
Breaking strength (MPa)	≥1,500	2325
Elongation at break (%)	≤3.1	2.58
Oil absorption rate (%)	≥50	51.1
Combustible content (%)	0.1∼1.0	0.5
Water content (%)	≤0.2	0.08
Heat resistance-break strength retention (%)	≥85	92

The heat resistance is defined as the break strength retention after 4 h of continuous heating in an oven at 250°C.