Bridge Deck Bitumen In East Timor
Last updated: 2026-10-19
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Bridge Deck Bitumen In East Timor
Bridge deck bitumen in East Timor typically means Pen 60/70 or PG 64-22 grade supplied in 180 kg steel drums or 1 MT bulk bags, priced at USD 620–780 per metric ton CFR Dili in 2025, with 20–35 day transit from Surabaya, Singapore, or Darwin. A standard 120 m bridge deck (7 m wide, 100 mm asphalt) requires roughly 95–110 MT of bitumen, and projects typically specify PG 64-22 or Pen 60/70 with ≥ 65% elastic recovery for thermal movement in Timor-Leste's coastal climate.
Why Bridge Deck Bitumen Specs Differ in East Timor's Climate
East Timor sits in a tropical savanna zone with surface temperatures on unshaded bridge decks reaching 65–72°C, seasonal rainfall of 1,500–2,000 mm, and high humidity year-round. This combination drives specification requirements that differ from standard road pavement:
- Softening point ≥ 49°C (Pen 60/70) or PG 64-22 to resist rutting under deck heat gain
- Penetration at 25°C: 60–70 dmm for flexibility under expansion joints
- Ductility at 15°C ≥ 100 cm to accommodate thermal and traffic-induced flex
- Elastic recovery ≥ 65% (for modified grades, PG 70-22 or SBS PMB) at bridge joints
- Water absorption ≤ 0.2% — critical given monsoon humidity and salt spray on coastal crossings
Bridge decks in Dili, Baucau, and the Oecusse enclave face salt-laden air year-round. Where decks are within 500 m of the coast, many specifications now call for SBS polymer-modified bitumen (PMB) at PG 76-22, which costs 15–25% more than Pen 60/70 but extends deck surfacing life by an estimated 40–50%.
| Grade | Softening Point (°C) | Penetration (dmm) | Typical Use in Timor-Leste | Price CFR Dili (USD/MT) |
|---|---|---|---|---|
| Pen 60/70 | 49–56 | 60–70 | Rural bridge decks, low traffic | 620–680 |
| PG 64-22 | ≥ 64 | — | Standard national road bridges | 650–710 |
| PG 70-22 (PMB) | ≥ 70 | — | Coastal crossings, high axle loads | 720–780 |
| PG 76-22 (SBS PMB) | ≥ 76 | — | Dili urban bridges, strategic corridors | 760–840 |
Supply Chain: How Bitumen Reaches East Timor Bridge Projects
East Timor has no refinery and no domestic bitumen production. All bridge deck bitumen is imported, and the supply route determines both lead time and landed cost. Three practical routes dominate:
1. Surabaya/Java → Dili Port — 7–10 days sailing, most common for Indonesian-origin Pen 60/70; lowest freight cost (~USD 45–60/MT)
2. Singapore → Dili — 14–18 days, best for SBS PMB grades sourced from regional traders
3. Darwin → Dili — 5–7 days, highest freight (~USD 90–120/MT) but fastest for urgent bridge refurbishment
Dili Port (Porto de Díli) handles breakbulk and containerized cargo; drummed bitumen is offloaded by crane and trucked to site. For the 200 km Dili–Baucau corridor and southern coast bridges (Suai, Same), overland haulage adds USD 18–35/MT depending on road conditions and season.
| Cost Component | USD/MT | Share |
|---|---|---|
| FOB bitumen (Pen/PG base) | 520–560 | ~78% |
| Ocean freight to Dili | 45–60 | ~8% |
| Port handling & clearance | 25–35 | ~5% |
| Inland haulage | 18–35 | ~5% |
| Drums/packaging | 20–30 | ~4% |
| Total CFR + inland | 628–720 | 100% |
Key insight: Packaging choice matters more in East Timor than in most markets. Bulk bitumen tankers cannot discharge at Dili (no heated storage terminal), so 180 kg drums (≈ 5.65 drums per MT) or 1 MT jumbo bags are standard. Drum cost adds USD 20–30/MT but avoids the need for heated tank investment on site.
Volumes, Consumption, and Project Planning
Timor-Leste's annual bitumen consumption is estimated at 8,000–14,000 MT, with bridge deck applications representing roughly 12–18% of that (960–2,500 MT/year). Major drivers include the national road rehabilitation program, the Dili–Suai highway bridges, and municipal bridge replacement in Liquiçá and Manatuto.
| Deck Area (m²) | Asphalt Thickness | Hot Mix Tonnage | Bitumen Content (~5.5%) |
|---|---|---|---|
| 400 (e.g., 40 m × 10 m) | 80 mm | 75–85 MT | 4.2–4.7 MT |
| 800 | 80 mm | 150–170 MT | 8.3–9.4 MT |
| 1,400 (120 m × 7 m × 2 lanes) | 100 mm | 280–320 MT | 15.5–17.6 MT |
| 3,000 (major river bridge) | 100 mm | 600–680 MT | 33–37 MT |
Planning note: Waterproofing membrane bitumen (applied under the asphalt layer on the concrete deck) adds a further 1.2–2.5 kg/m², i.e., 0.5–7.5 MT depending on deck size. Do not omit this line from procurement — it is frequently underestimated in East Timor tenders.
Lead times: allow 45–60 days from purchase order to on-site delivery for drummed Pen 60/70 via Surabaya, and 60–75 days for SBS PMB via Singapore. During the November–March wet season, Dili Port congestion and road washouts can add 7–14 days.
Quality, Testing, and Compliance Considerations
East Timor does not yet publish a standalone national bitumen standard; most public tenders reference AASHTO M 320 (PG grading), ASTM D946 (Pen grade), or Indonesian SNI 06-2456 equivalents. Practical compliance checklist for bridge deck supply:
- Certificate of Analysis (COA) per batch — penetration, softening point, ductility, viscosity at 135°C
- Third-party pre-shipment testing (SGS/Intertek Surabaya or Singapore) — adds USD 8–15/MT but resolves most tender disputes
- Retained samples sealed for 12 months minimum
- Heat stability test for PMB grades (separation test, ≤ 2.5°C difference)
- Flash point ≥ 230°C for safe drum transport in tropical conditions
Common failure mode in East Timor: drummed bitumen stored in direct sun for weeks before use. Store drums under shade or tarpaulin and rotate stock — surface softening and skin formation affect joint performance on bridge decks more than on standard roads.
FAQ: Bridge Deck Bitumen in East Timor
Q1: What grade of bitumen is used for bridge decks in East Timor?
Pen 60/70 is the baseline for most rural and low-traffic bridge decks, while PG 64-22 or SBS-modified PG 76-22 is specified for coastal and high-traffic crossings in Dili and Baucau. Coastal decks within 500 m of the sea increasingly require PMB for salt-spray and thermal resistance.
Q2: How much does bridge deck bitumen cost delivered to Dili?
Expect USD 620–710/MT CFR Dili for Pen 60/70 and PG 64-22 in 2025, rising to USD 760–840/MT for SBS PG 76-22. Add USD 18–35/MT for inland haulage to sites outside Dili.
Q3: How long does delivery take from order to site?
Drummed Pen 60/70 from Surabaya takes 45–60 days door-to-site including production, sailing, and clearance. SBS PMB via Singapore runs 60–75 days. Add 7–14 days during the November–March wet season.
Q4: How much bitumen does a typical bridge deck need?
A 120 m × 7 m deck with 100 mm asphalt requires roughly 15–18 MT of bitumen in the mix, plus 0.5–2 MT for waterproofing membrane. Larger 3,000 m² river crossings need 33–37 MT in the mix alone.
Q5: Can bulk bitumen tankers discharge at Dili Port?
No — Dili Port has no heated bulk bitumen terminal, so shipments must arrive in 180 kg drums or 1 MT jumbo bags. This packaging adds USD 20–30/MT but is the only practical option for East Timor projects.
Plan Your Bridge Deck Bitumen Budget with 6Tar
Getting bridge deck bitumen numbers right in East Timor means accounting for grade, packaging, ocean freight, port clearance, and inland haulage — variables that shift by USD 100–150/MT between routes. Use the 6Tar cost calculator to build a landed-cost estimate for your specific deck area, grade, and delivery destination in Timor-Leste. Enter your tonnage, choose drum or jumbo bag packaging, select Surabaya, Singapore, or Darwin as origin, and get a CFR Dili plus inland delivery figure in under two minutes — before you commit to a tender price.