: 1. 424/4002

: /

( ) Penetration Of Asphalt

: )(1mm ) (100 gm )(25 Co ) (1/100cm )(1/10mm

: .

: . ( 5cm + 1mm .) 50gm . ( 52 ). 1.0 . . . 1. 2. 3. 4. 5. 6. 7.

:1. )08 011( . 2. )(25Co 3. . 4. . 5. 52 52 52 .

:1. . 2. 50 gm 001 gm . 50gm 3. . 4. 5 . 5. . 6. 1cm . 1cm

: 3.89 - ( )Gravel ()Sand D60=7mm D30=2.7mm 2. : D10=0.7mm 3. 2,1 : ()GW 4.

4>01= 01CU=D60/D 1 >94.1= )01Cc=(D30)^2 /( D60* D

()California Bearing Ratio C.B.R

: ) (CBR : 1. , ) (Subgrade ) (sub-Base ( . ( Base Coarse 2. ( ) . 3. .

: ) (CBR : () () ( ) 1.954 in ( )0.05 in / min ( ) () () (.)5.0mm, 2.5mm () ()q 100 X = CBR () ,

5CBR 2.5 > CBR

.

) (CBR : (2) )(mm 5.2 0.5 5.7 01 7.21 )(Mpa 9.6 3.01 00.31 00.61 00.81

) (CBR : (3)

AASHTO 7A5,A6,A ,7A4,A5,A6,A ,7A2,A4,A6,A ,5-2-A-1-b, A 6-2-A3,A 4A-1-a , A-2-4 ,A

()Subgrade ()Subgrade )(sub-base Base course Base course

% 30 7- 3 02-7 05-02 05>

: ( ) = 661 46.11

: , : ) , (Mold , , . ).(50mm, 20mm, 5mm ( )0.01mm ) (2.27Kg . . . 1. 2. 3. 4. 5. 6. 7. 8.

:1. . 2. . 3. ( ) 4. () (5) (65) . 5. . 6. ( ) . 7. ) (4.5kg . 8. ( 69 ) . 9. () . 11. ) (4.5kg = 5101 52101 5101 57101 11015101 201301 401 501 . 11. . 21. .

:

(C.B.R) (N/cm2) 10 15 33 40 58 83 102 118 )( 0.5 1 2 2.5 3.75 5 7.5 10Stress (N/cm2) 120 100 80 60 40 20 0 0 1 2 3 4 5 6 7 8 9 10 Settlement (mm)

Stress at Penetration (2.5mm) = 44 N/cm2 Stress at Penetration (5mm) = 76 N/cm2 C.B.R (2.5mm)=(44/690)*100=6.4 C.B.R (5mm) = (76/1035)*100 =7.4% There For C.B.R (2.5)< C.B.R (5) Use C.B.R (5) = 7.4 %

: : 5)(C.B.R)2.5 < (C.B.R ()CBR 5 . %4.7=5) (C.B.R (7-20)% . ( )C.B.R ( )AASHTO ( 7 )A2, A4 , A6 , A )0()6-2-.(A ( 5% ) . -

-

Los Angelos Abrasion 5775 .

:131 ASTM C 69 AASHTO T

. . . : (227 ) (225) (89 ) ( 1 221) . (9764 ) ( 285 544 ) . : 1. 0. 5. 4.

0005 4854 0333

A B C

21 11 8

1. : D 01 0005 0 0225 0 C 01 0052 01 0052 0 1225 B A 0521 5.73 52 52 0521 91 52 52

01 0052

0521 91 5.21 01 0521 5.21 5.9 01 0005 01 5.9 3.6 3.6 57.4 57.4 63.2

01 0052 2225

:1. 5 kg (1. )W 0. 225 25 55 01 . ) w2)= 4405.4gm 3. : () = (2W1x 100 / )W1 w : 1 :W . 2 :w .

: : )001*1= (w1-w2)/(w (001*0005(/)4.5044-0005(= %9.11 =

: : % )03- 02( )04 03( )04( )05( -

- %)03 02( .