Advance Technologies for Highway
Pavement on Going in Vietnam
Assoc. Prof. Vu Duc Chinh
MS. Bui Ngoc Hung

INSTITUTE OF TRANSPORT SCIENCE AND TECHNOLOGY-ITST

Contents
1. Advance Technologies for Highway Engineering Ongoing inVietnam
2. Necessary Advance Technologies for Highway Engineering in nearFuture1. Advance Technologies for Highway Engineering ongoing

1. Repairing work of Thang Long Bridge pavement using Novabond(Hall Brothers Co.Ltd-USA).
2. Porous Asphalt (Taiyu Kensetsu Co.Ltd -Japan).
3. Modified Asphalt Concrete using Rekiphalt (Doro Kogyo Co.Ltd Japan).

1. Advance Technologies for Highway Engineering ongoing
1.1. Repairing work of Thang Long Bridge pavement

1. History
 Project of Repairing of Thang Long Bridge pavement performed from October
2009 to December 2009. Technology transfer by Striling Lloyd polychem Ltd-UK&VIPEXIM, JSC (UK).

 Structural consist of (from up to down):•

SMA, NMAS=12,5, 4cm.

•

SMA, NMAS=9,5, 3cm.

•

Bound coat (adhesion) layer.

•

Eleminator (waterproofing) layer.

•ZED S94 paint (protect the steel deck).

1. Advance Technologies for Highway Engineering ongoing
1.1. Repairing work of Thang Long Bridge pavement

1. Advance Technologies for Highway Engineering ongoing
1.1. Repairing work of Thang Long Bridge pavement

 After 3 month, appear damaged1. Advance Technologies for Highway Engineering ongoing
1.1. Repairing work of Thang Long Bridge pavement
2. Damaged repairing work: Performed by Hall Brothers Ltd company (USA).
 Repairing method:• Remove 7 cm SMA by machine.
• Paving 7 cm PAC. Novabond adhesive layer to be sprayed the same time
when paving PAC.
 Progress:• Almost entire damaged have been repaired.
• Continue to repair 12.000 m2 SMA pavement remaining (including SMA
locations not yet damaged). Intended to complete before December 2013.
3. Assessment:• Almost of the repaired position after 14 months are stable, not yet appear
damaged again, better for vehicle traffic.
4. Direction of Ministry of Transport of Vietnam (MOT):• Implement new projects, using Japanese technology to construction of newpavement on Thang Long Bridge.
• The project will be implemented when Nhat Tan Bridge Project finished.

1. Advance Technologies for Highway Engineering ongoing
1.2. Porous Asphalt (Japan)
1. Materials: Aggregate, Polymer Modified Asphalt (Asphalt with TAFPACK-SUPER TPS)

Gradation Range for Porous Asphalt
Sive Size (mm)Passing (%)#20#1326.5100
19.0
95-100
100
13.2
64-84
90-100
4.75
10-31
11-35
2.36
10-20
10-20
0.075
3-7
3-7

High-Viscosity Asphalt (with TPS modifier)
Test Items
Results Requirements
1234567

Penetration (25 de.C,1/10 mm)
Softening Point (de. C)
Ductility (15 de. C, cm)
Loss on TFOT (%)
Toughness (Nm)Tenacity (Nm)Viscosity at 60 de.C (Pa.s)

2. Mix Design Criteria

12345

Target Values for Porous Asphalt Mixture
Items
Target ValuesMarshall Stability (KN)
Min.5
Air Void (%)
About 20
Cantabro (%)
Max.20Permeable (cm/s)
Min. 10-2
Dynamic Stability
Min. 3000 pas/mm

4692.5
322
0.06
23.8
16.1
250.000

Min. 40
Min.80Min. 260
Max.06
Min.20Min. 15
Min.20.000

1. Advance Technologies for Highway Engineering ongoing
1.2. Porous Asphalt (Japan)
3. Laboratoty Testing: Finished (Accepted by VN Ministry of Transport - MOT).
Test Results
Test Items

Unit

Aggregate in North area

Aggregate in South area

Requirementby Japan

PA 13

PA 20

PA 13

PA 20%

5.0

4.8

4.4

4.2

g/cm32.1722.232

2.006

1.996

-

Air Void%

20.74

19.52

19.83

20.81

~ 20VMA%

29.68

27.71

28.69

29.25

-Permeability

cm/s----≥1.0×10-2

Interconnected porosity

%

15.39

14.48

14.99

16.36

-

Marshall Stability at 600CKN

4.97

6.63

7.07

5.92

≥ 3.5

Marshall Flow at 600C

mm

2.49

2.60

2.61

3.20

2-4

Marshall Stability Loss%

82.03

85.11

85.21

85.48

-

Cantabro Test

%

9.43

10.53

14.53

17.73

≤ 20cycle/mm

5727

6300

-10500≥ 3000Asphalt Content
Unit Weight

Dynamic Stability-DS

1. Advance Technologies for Highway Engineering ongoing
1.2. Porous Asphalt (Japan)
4. Paving and Testing on Site:• Experiment section at CauGie-NinhBinh Expressway: ongoing• Experiment section: Using PA 13• Thickness: 5cm on existing pavement• Length: 300 m; With: 30 m.
• Ongoing survey the existing pavement, preparation materials…
5. Further work:• Paving PA 13 (performed by Taiyu Kensetsu Co.Ltd -Japan and Vietnam
joint venture).
••••

Testing and assessment by ITST (expected to in approximately 12 months).
Make report for technology assessment (by ITST) submitted to the MOT.
Science and Technology Council of MOT (STC) will appraises and assesses
the Porous Asphalt Technology base on the reports of ITST.
MOT decision to allow technology applications in Vietnam (if successful)1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)
1. Purposes•

Repair Thanh Tri concrete bridge damaged pavement by permanentdeformation

1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)
2. Materials•Aggregate, Modified Asphalt

Aggregate
Sive Size,mmPassing, %1910012,5Modified Asphalt
Test Items

Requirement

Penetration at 25OC, 0.1mm≥ 40

95-100Softening Point, oC≥ 70

4,7555-70

Ductility ở 15OC, cm≥ 50

2,3635-50

Flash Point, OC≥ 280

0,618-30

TFOT, %

≤ 0.6

0,310-21

Toughness at 25OC, Nm≥ 16

0,156-16

Coating

≤ 5%

0,075

4-8

Asphalt
Content5-7

1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)
2. Materials•Adhesion layer, Water proofing layer

Adhesion layer –Caticoat R
Test Items

Requirement

Penetration at 25 deg.C,0.1mm≤ 60Softening Point, deg. C≥ 20Ductility ở 15C, cmPass

Flash Point, deg. CPass

Water proofing layer Fresh coat

Test Items

Requirement

1. Penetration at 25 deg.C, 0.1mm

1-5

2. Softening Point, deg. C≥ 80

3. Tensile strength, 23 deg C, N/mm2≥ 0.35

4. Percent deformation, %≥ 300

5. Alkali resistance, 23℃ (a)Normal6. Salt resistance, 23℃ (b)Normal7. Print resistance, 60℃

Normal1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)
3. Mix Design Criteria

No.

Test Items

Requirement

1Blow Number

75 x 2

2Marshall Stability at 600C, kN

min. 10

3Flow, mm2-44Air Void, %3-65VFA, %70 - 85

6Dinamic Stability (1.12 MPa, 60OC) (WheelTracking Test),

min. 3000

7Imersion Wheel Tracking Test, peeling area, %max. 5

1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)
4. Laboratoty Testing: Finished (Accepted by MOT).
5. Paving on site: Finished Experiment section at ThanhTri Bridge
 Consist of 3 adjacent sections : (1) Renkiphalt: 200m x 4m, (2) PAC (by VN Standard, PMB 3): 100m x 4m,(3) AC (bitumen 60/70 pen.): 50m x 4m
 Thickness: 7 cm (Two layer, 3cm and 4cm)

1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)
6. Testing and assessment on site: ongoing (by ITST)• After 3 days of construction finished: Pavement of 3 sections is good
• After 1 month of construction finished: Pavement of 3 sections is good
• After 3 months of construction finished: Pavement of 3 sections is good• After 6 months of construction finished: 3 sections permanent deformation appear

1. Advance Technologies for Highway Engineering ongoing
1.3. Modified Asphalt Concrete using Rekiphalt (Japan)

7. Solutions:•

Doro Kogyo Co.Ltd – Japan have been determinning the reasions

2. Necessary Advance Technologies for Highway Engineering in Vietnam

1. Solutions, advance technologies for limited the permanent deformation.
2. Advance technologies for pavement maintenance: (Micro Surfacing, FogSeals, Cape Seals…).
3. Semi-Flexible pavement technology.
4. Polyme modified asphalt emulsion technology.
5. Adhesion-water proofing material for concrete desk.

Some words from ITST:•

We hope Japanese companies bring new technologies early on Vietnam.

•The scientific collaboration between NILIM, Nippon Road Co. Ltd withITST creates many opportunities for improving our knowledge of scienceand technology, of Japan's culture.

•Thanks for these feelings of You and of Japanese people for us.

ISO 9001 : 2008

Thanks for the attention!