Experimental Study on Structural Mechanics of Asphalt Pavement by Digital Speckle Correlation Methods

Table 5

Center line shear strain of the asphalt layer bottom.

Working condition	Bottom of the upper layer/	Bottom of the middle layer/	Bottom of the lower layer/
Standard load	−0.003768	0.003234	0.005789
50% overload	−0.005441	0.006221	0.009878
	44.40%	92.37%	70.63%
100% overload	−0.008164	0.012155	0.013278
	116.67%	275.83%	129.36%