Road Note 29 & 31

ROAD NOTE 31 AND ROAD NOTE 29 Perbedaan Road Note 31 dan Road Note 29

No.

Item Road Note 31 Road Note 29

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

First publication Area Type of pavement Road Traffic Nomogram Recommended design road Recommended surfacing Equevalent value of load Serviceability terminal

1962 Trpfical-sub trpfical countries Flexible pavement New and streagthen road Low and medium 1 (flexible) Up to 15 years Surfacing dressing (premix) Liddle formula SN ≤ 3, pt = 2.0 2.0

1960 Temperatur climate Flexible and rigit pavement New road no with resurfacing and maitenance Medium and heavy 5 (flexible) and 3 (rigid) Up to 20 – 40 years Any type Liddle formula SN ≤ 3, pt = 2.5 2.0

Komentar :

- Keduanya tidak menggunakan besaran kekakuan relatif lapisan (a) - Kurang bebas memilih jenis tiap lapis perkerasan - Cara AASHTO atau BM lebih bebas memilih jenis tiap lapisan karena

menggunakan besaran (a)

ROAD NOTE 31

• Issued by TRL (Transport Research Laboratory-UK) in 1993

• A Guide to the Structural Design of Bitumen-Surface Roads in Trofical

and Sub-Trofical Countries.

• Design are presented in the form of a structural cataloque.

• Traffic classes considere :

T1 = < 0.3 (106 ESAL) T5 = 3.0 – 6.0

T2 = 0.3 – 0.7 T6 = 6.0 – 10

T3 = 0.7 – 1.5 T7 = 10 – 17

T4 = 1.5 – 3.0 T8 = 17 – 30

• Subgrade strength classes :

S1 = < 2 (CBR %) S4 = 8 – 14

S2 = 3 – 4 S5 = 15 – 29

S3 = 5 – 7 S6 = > 30

• Designs are presented in 8 chart, each chart reprensetens a particular

combinations of layer materials

Chart 1 : Granular road base + surface dressing (not applicable for

traffic classes T7 and T8)

Chart 2 : Composite road base (unbound + cemented layer) + surface

drressing (not applicable for traffic classes T8)

Chart 3 : Granular road base + semi-structural surfacing (50 mm of

asphaltic materials) not applicable for traffic classes 7 and 8)

Chart 4 : Composite road base + semi-structural surfacing (not

applicable for traffic classes 1 and 2)

Chart 5 : Granular road base + structural surfacing (100 mm to 150

mm of asphaltic) applicable only for traffic classes 6, 7 and 8)

Chart 6 : Composite road base + structural surfacing (100 mm to 150

mm of asphaltic )

Chart 7 : Bitominous road base + semi-structural surfacing (not

applicable for traffic classes T1, T2 and T3) surface drressing

for for traffic classes T4, 50 mm asphaltic for 5, 6, 7 and 8)

Chart 8 : Cemented road base + surface dressing (not applicable for

traffic classes T9 and T8)

ROAD NOTE 29

• Design for New road no with resurfacing and maitenance.

• Type of pavement Flexible and rigit pavement. • Used nomogram 5 (flexible) and 3 (rigid).

Nomogram flexible pavement : Nomogram 1 : Thickness of sub-base Nomogram 2 : Rolled asphalt (minimum thickness of surfacing and road

base) Nomogram 3 : Dense macadam (minimum thickness of surfacing and road

base)

Nomogram 4 : Lean concrete, soil cement and cement-bound granular road base (minimum thickness of surfacing and road base)

Nomogram 5 : Wet-mix and dry-bound macadan road base (minimum

thickness of surfacing and road base)

Nomogram rigid pavement :

Nomogram 1 : Concrete (minimun Thickness of slaps) Nomogram 2 : Reinforcement (minimum weight for slaps) Nomogram 3 : Maximun spacing of joint for reinforced concrete slaps

• For cummulative commercial vehicle used 5 variantgrowth rate ( 3%,

4%, 5% and 6%)