Effects of Crumb Rubber Size and Concentration on Performance of Porous Asphalt Mixtures

Figure 4

Scanning Electron Microscopy (SEM) pictures for different sizes of crumb rubber particles: (a) #4~#20; (b) #20~#200; (c) #4~#200; (d) #100~#200; (e) #100~#200.

(a)

(b)

(c)

(d)

(e)