B IRI : ( 11,800
Poor Poor Poor
SMA SMA TN TN
SMA Hyb ( A
SMA 11 12 13
+ 13-0 B.C D (1/100mm) (%) (%) D
D DF 4.75mm 20 20 13-5mm 50 20
: :. : : 13-5 5-0 : :, 1
H13.10) 1/31/4 50 75 100 50 75 100 +30
80 50 JH 8m PrI 3m IRI IRI IRI (km) IRI(mm/m) (km) IRI(mm/m)
IRI AASHO 5 MPR=4*exp(-0.36*IRI)+1 MPR r=0.82 IRI(mm/m) MPR 10
RCCP 31 13 30 IC H12.7