Influence of Fiber Type on Low-Temperature Fracture Performance of Presawed Asphalt Mixture Beams

Table 5

Calculation of fracture toughness .

Temperature (°C)	Presawed migration (mm)	(MPa·mm^0.5)
		Plain	Polyester fiber	Basalt fiber	Lignin fiber
−10	0	9054.489	9769.687	9629.451	9839.804
	20	9830.455	9162.002	8881.533	10681.212
	40	14051.52	13383.07	13425.14	15963.390
0	0	9966.015	10120.27	9475.193	9068.513
	20	9465.84427	10587.722	12116.281	10120.273
	40	13897.26	15308.960	14547.020	14874.230
10	0	9839.804	9068.513	10643.820	9769.686
	20	11405.758	9942.642	11976.046	10157.669
	40	13766.38	16580.420	15037.84	14799.440