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.

First publication

1962

1960

2.

Area

Trpfical-sub trpfical countries

Temperatur climate

3.

Type of pavement

Flexible pavement

Flexible and rigit pavement

4.

Road

New and streagthen road

New road no with resurfacing and maitenance

5.

Traffic

Low and medium

Medium and heavy

6.

Nomogram

1 (flexible)

5 (flexible) and 3 (rigid)

7.

Recommended design road

Up to 15 years

Up to 20 – 40 years

8.

Recommended surfacing

Surfacing dressing (premix) Any type

9.

Equevalent value of load

Liddle formula SN ≤ 3, pt = 2.0

Liddle formula SN ≤ 3, pt = 2.5

2.0

2.0

10. Serviceability terminal

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 =

•

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

S4

=

S2 = 3 – 4

S5

= 15 – 29

S3 = 5 – 7

S6

=

Subgrade strength classes : S1 = < 2

•

(106 ESAL)

< 0.3

(CBR %)

8 – 14

> 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%)