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SARA fractions are typical ranges by ASTM D4124 or TLC-FID (ASTM D7500 / IP 391). Actual values vary by crude source — always request refinery SARA certificate. RAP binder recovery per ASTM D2172 / EN 12697-3 required before blending study.
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AASHTO PP 66 — Used for asphalt pavement design in the US and internationally. T₂₀ₘₘ estimates the peak pavement temperature at 20 mm depth based on air temperature and latitude.
T₂₀ₘₘ = 0.9645 × [Tair,max − 0.00618·Lat² + 0.2289·Lat + 42.2] − 17.78Tair,max = highest recorded yearly maximum air temperature (°C) Lat = geographical latitude of the site (degrees)
Tair,max
All-time recorded yearly max
— °C
T₂₀ₘₘ
Peak pavement temp
— °C
+2°C Hwy
Highways
— °C
Lat
Geographic latitude
—°
Values will appear after calculation.
Reference: AASHTO PP 66 · LTPPBind v3.1 · Witczak et al. Climate data: Web Data + local web sources — higher value used
EN 1337-3 (Annex B) — European standard for structural bearings. Uses the same T₂₀ₘₘ formula as AASHTO for determining the high-temperature grade of bituminous layers.
T₂₀ₘₘ = 0.9645 × [Tair,max − 0.00618·Lat² + 0.2289·Lat + 42.2] − 17.78Same formula as AASHTO PP 66 — adopted in EN 1337-3 Annex B. Tair,max = maximum air temperature from climate records (°C) · Lat = latitude (degrees)
Tair,max
All-time recorded yearly max
— °C
T₂₀ₘₘ
Peak pavement temp at 20mm
— °C
+2°C Hwy
Highways
— °C
Lat
Geographic latitude
—°
Values will appear after calculation.
Reference: EN 1337-3:2005 Annex B · European Standard for Structural Bearings Climate data: Web Data + local web sources — higher value used
IRC 37:2018 (Indian Roads Congress) — IRC:37-2018 (4th Revision) specifies peak pavement temperature for mix design using the AASHTO T₂₀ₘₘ approach. Adds +2°C reliability factor for National Highways and Expressways. Mix design per IRC:111-2009 (BC/DBM), IS 17127:2019 (SMA), IRC:139-2019 (Low-Volume Roads). Binder selection per IS 73:2013 (VG) and IS 15462:2019 (PMB Type I/II/III, CRMB). MoRTH Circular 19-Apr-2024 mandates PMB on all Expressways/High-traffic NHs.
T₂₀ₘₘ = 0.9645 × [Tair,max − 0.00618·Lat² + 0.2289·Lat + 42.2] − 17.78Tair,max = highest recorded annual max air temp from IMD / Web Data sources (°C) Lat = latitude of project site (degrees) +2 °C reliability factor for Highways (IRC 37:2018)
Tair,max
Highest yearly max (all sources)
— °C
T₂₀ₘₘ base
Peak pavement temp
— °C
Lat
Geographic latitude
—°
Values will appear after calculation.
Reference: IRC:37-2018 — Guidelines for Design of Flexible Pavements (4th Revision) · IRC:111-2009 — Specifications for Dense Graded Bituminous Mixes · IS 17127:2019 — Stone Matrix Asphalt · IS 73:2013 · IS 15462:2019 · IRC:139-2019 · MoRTH 5th Rev.2013+Amd 2023 · MoRTH Circular 19-Apr-2024 Indian Roads Congress · Climate data: Web Data + IMD + local sources — higher value used
✈ FAA/ICAO Airport Design Pavement Design and Simulation
Visualise
AI-powered pavement design intelligence
AI Engine
Design Temperature
—
°C · T₂₀ₘₘ + traffic load
—
Risk Assessment
Thermal rutting
—
Structural fatigue
—
Moisture damage
—
Estimated Service Life
—years
Binder Grade Suitability
Road Design Cross-Section
Road Performance Forecast
AI Engineering Recommendations
Analysing…
🚀 Simulation Suite
Launch specialist module → inherits current project data
WorldPaveAI
AI Enabled Global Sustainable Airport & Road Infrastructure Intelligence Platform
Mechanistic–Empirical Design · Digital Twin Simulation · Real-time Structural Analysis
IRC:37-2018AASHTO MEEN 12697 / EME2Austroads AGPT02NCHRP 646IRC:58-2015AASHTO RigidEurocode EN 1337UK HD 26JTG D50Perpetual Design
Wearing Course / SMA
Binder Course / DBM
Base Layer / EME2
Granular Sub-base
Subgrade
εt (Tensile Strain)
εv (Compressive)
PCC Slab
DLC / CTB
Subbase
Subgrade
Edge Stress
Corner Stress
Warping/Curl
♾
Structural Status: Checking…
Adjust sliders to compute strain response
Wearing Course Thickness60
mm · SMA / BC / BBTM · 30–120 mm
Binder / DBM Course80
mm · DBM / AC-Base · 0–200 mm
Base Layer Thickness120
mm · BM / EME2 / Granular · 0–300 mm
Sub-base Thickness200
mm · Granular / Stabilised · 100–500 mm
Subgrade CBR (%)8
California Bearing Ratio · 2–30 %
Design Traffic (msa)100
Million Standard Axles · 1–600 msa (Very Heavy = 600 msa)
AC Modulus E (MPa)3500
Stiffness · Standard 3500 · EME2 14000 MPa
Design Temperature (°C)40
Max pavement temp T₂₀ₘₘ · affects rutting risk
PCC Slab Thickness300
mm · PCC Slab · IRC:58-2015 min 300mm (>100msa) / 250mm (50-100msa) / AASHTO Rigid min 200mm
DLC Thickness100
mm · Dry Lean Concrete base · 0–200 mm
CTB / Stabilised Base0
mm · Cement Treated Base · 0–300 mm
Subbase Thickness200
mm · Granular / GSB · 100–500 mm
Subgrade CBR (%)8
California Bearing Ratio · 2–30 %
Design Traffic (msa)150
Million Standard Axles · design CVPD
PCC Flexural Strength (MPa)4.5
MR (Modulus of Rupture) · IRC:58: 4.5 MPa min · 3.0–6.5 MPa
ΔT Temp Differential (°C)16
Top-to-bottom ΔT · IRC:58-2015 Table 4 (h=300mm): Zone I=15.8°C, Zone II=16.8°C, Zone III=21.0°C, Zone IV=18.1°C · AASHTO MEPDG≈14°C
Tensile Strain εt
—
µε at base of AC
—
Compressive Strain εv
—
µε at subgrade top
—
Fatigue Life Nf
—
Million repetitions
—
Rutting Life Nr
—
Million repetitions
—
DESIGN LIFE
—
Years (at design traffic)
—
Structural Number SN
—
AASHTO equivalent SN
—
🏗️ Structural Layer Outputs
PCC Slab Thickness
—
mm · Portland Cement Concrete
—
DLC Thickness
—
mm · Dry Lean Concrete
—
CTB Thickness
—
mm · Cement Treated Base
—
Subbase Thickness
—
mm · Granular / GSB
—
⚙️ Mechanistic Stress Outputs (Westergaard)
Edge Stress σe
—
MPa · critical load case
—
Corner Stress σc
—
MPa · at slab corner
—
Interior Stress σi
—
MPa · at slab interior
—
Warping + Curling Stress
—
MPa · env. + load combined
—
📊 Empirical Performance Outputs
Fatigue Life
—
Years (at design traffic)
—
Faulting / Joint Deterioration
—
mm · predicted joint faulting
—
Pumping Risk
—
Index (0–10)
—
Crack Probability
—
% · end-of-design-life
—
Layer
Material
THICKNESS
Modulus
Coeff.
Scale
Layer
Material
THICKNESS
E / k-value
STANDARD
⚠️ ME Pavement Design simulation uses calibrated analytical models (Boussinesq multi-layer M-E for flexible; Westergaard stress equations for rigid). Results are indicative for comparative analysis only. Final design must use site-specific IITPAVE / KENPAVE / AASHTO ME / JPCP-MEPDG / IRC:58 software with field data.
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AI-Powered Asphalt Binder Selection for Road Engineers Worldwide
WorldPaveAI is the world's most comprehensive free AI tool for asphalt binder grade selection and pavement design, covering India (VG-10 VG-20 VG-30 VG-40 per IS 73:2013, PMB Type I II III per IS 15462:2019, CRMB 55 60 65, IRC 37:2018, MoRTH 5th revision, SMA per IS 17127:2019), USA and Canada (AASHTO M320 PG grades PG 52-28 to PG 82-22, MSCR M332-23 H V E grades, Superpave AASHTO R35, FAA P-401 airport), Europe (EN 12591:2009+A1:2022 pen grades 20/30 to 160/220, EN 14023 PMB 25/55-55 to 10/40-70, EN 13108-1 asphalt mix, German TL Asphalt, French NF EN, UK CS 229), Gulf GCC (ASTM D3381, PG 70-10 PG 76-10 PG 82-10 PG 88-10, Qatar MMUP ASHGHAL, Saudi SASO MOMRA, Abu Dhabi DoT UAE), Australia New Zealand (AS 2008 Class 170-600, Austroads AGPT04 A35E A20E A10E A35P, VicRoads TMR MRWA NZTA), Africa (SABITA SANS 307 TRH8 COLTO S-E1 S-E2 S-E3, Kenya KURA Tanzania TANROADS Nigeria FMW Ethiopia ERA), China (JTG F40-2004 AH-30 AH-50 AH-70 AH-90 AH-110 AH-130 SBS-I-C SBS-I-D), Japan (JIS K2207:2023:2023 PEN 60-80 PMB Type I II III-H NEXCO JRA 2023), Korea (KS M2201:2022 AP-5 AP-3 MOLIT KEC), Southeast Asia (Malaysia JKR ATJ Indonesia SNI Philippines DPWH Thailand TIS Vietnam MOT Singapore LTA), Central Asia, Latin America, Caribbean, and Pacific regions. The platform calculates pavement design temperature T₂₀ₘₘ using AASHTO PP 66 from live GPS weather data, provides Risk Dashboard with rutting risk score fatigue cracking probability thermal cracking index moisture damage risk design reliability (AASHTO 93 R=90/95/97.5%), Climate Geo Intelligence Layer with Köppen classification IPCC AR6 SSP scenarios and binder grade shift projections, Standards TQR compliance report, Supply Chain Intelligence, RAP recycling optimizer, M-E Digital Twin, and airport pavement design. Powered by Worldcon Technologies Pvt. Ltd. India. Free, no login required.
USA AASHTO Superpave suppliers: Ergon asphalt binder PG grade, Calumet bitumen, Vulcan Materials aggregate, Martin Marietta aggregates, CRH Americas, Astec Industries asphalt plant, Pine Test Equipment, Cooper Research lab, Troxler nuclear gauge.
Europe EN 12591 bitumen suppliers: Nynas Sweden UK Germany Belgium, Neste Finland, Total Bitumen France, Shell Bitumen Netherlands UK, BP Bitumen UK, Colas France, Repsol Cepsa Spain, ENI Italy, Orlen Lotos Poland, MOL Hungary, OMV Austria, TUPRAS Turkey, CONTROLS Group Italy lab, ELE International UK lab, Anton Paar Austria rheometer.
Gulf GCC ASTM D3381 suppliers: ADNOC Distribution UAE, Saudi Aramco Total Bitumen, KNPC Kuwait, Qatar Petroleum Woqod, Oman Oil Company, BAPCO Bahrain, PG 76-10 PG 82-10 desert road, Qatar MMUP approved, Abu Dhabi DoT approved, Saudi SASO 5005 approved.
Australia Austroads AS 2008 suppliers: Viva Energy Shell bitumen, BP Australia, Puma Energy, Bitumix, Fulton Hogan road contractor, Downer EDI road, Boral aggregates, OPC/PPC Australia, NATA accredited lab, VicRoads approved, TMR Queensland approved.
China JTG F40 suppliers: SINOPEC bitumen, PetroChina, CNOOC, Shandong Aosheng, Ketian Chemical SBS, Qilu Petrochemical SBS, XCMG asphalt paver, SANY road equipment, CCCC road contractor, JTG E20 standard lab.
Japan JIS K2207:2023 suppliers: Idemitsu Kosan, Cosmo Oil, ENEOS, Showa Shell bitumen Japan, Maeda Road Construction, Nippon Road, Taisei Road Japan, Ammann Japan asphalt plant, NEXCO approved supplier.
Southeast Asia JKR Bina Marga DPWH TIS suppliers: PETRONAS Bitumen Malaysia, Shell Malaysia, Pertamina Indonesia, PTT TIPCO Thailand, PetroVietnam, Petron Philippines, IJM Malaysia, Gamuda Malaysia, Waskita Indonesia, EEI Philippines, SIRIM Malaysia lab, BPPT Indonesia testing.
Africa SABITA SANS KURA ERA suppliers: Total South Africa, Engen SA, Tosas SA, NNPC Nigeria, Total Kenya, TotalEnergies Ethiopia, Concor SA road, Julius Berger Nigeria, Raubex SA road, CSIR South Africa lab, KURA labs Kenya, China Road Bridge CRBC Africa.
Global road additive suppliers: Iterchimica Italy antistrip warm mix, Ceca France Arkema additive, Kraton polymer SBS USA, Dynasol SBS Spain, Ingevity warm mix USA, Sasobit Sasol Germany, Evotherm bitumen additive, DUSLO Slovakia SBS, Versalis ENI Italy SBS, Huntsman additives, Dow Chemical bitumen, Chemical admixture supplier road additive, Admixture (ASTM C494) road product, Admixture (EN 934-2) infrastructure.
Global road machinery suppliers: Wirtgen Group Germany paver milling recycler, Vogele asphalt paver, Hamm roller compactor, Kleemann crusher, Dynapac Sweden asphalt roller, Caterpillar USA road equipment, Volvo CE Sweden road, Bomag Germany compaction, Sakai Japan roller, Ammann Switzerland asphalt plant, XCMG China paver, SANY China road, Marini Fayat France asphalt, Benninghoven Germany bitumen plant, Apollo India asphalt plant, Parker UK asphalt plant, Lintec Germany asphalt.
Global lab equipment suppliers: CONTROLS Group Italy pavement test, ELE International UK, Humboldt USA, Pine Test Equipment USA asphalt gyratory, Cooper Research UK bitumen, Anton Paar Austria DSR rheometer, Malvern Panalytical UK DSR, Cannon Instrument BBR USA, Aimil India testing, Tritech India equipment, NL Scientific India lab, Matest Italy civil lab, Wykeham Farrance UK, Dynatest Denmark FWD, KUAB Sweden FWD, Troxler USA nuclear gauge, James Instruments USA, Gilson USA aggregate sieve, Geneq Canada lab.
Pavement optimisation dashboard
AI-powered design for performance, cost and sustainability
AG
Traffic (MSA)
50million
1200
TEMPERATURE
55°C
30°C70°C
Subgrade CBR
8%
220
DESIGN LIFE
20years
1030
Binder type
Design for 60°C (traditional)
Actual climate designⓘ
Cost vs thickness trade-off
ⓘ
Conventional (VG) PMB / PMA
AI insight: PMB design achieves the same performance with 22% less thickness and 32% lower lifecycle cost.
Total thickness
125 mm
22% less ↓
Initial cost
₹1.08 Cr
8% higher ↑
Lifecycle cost
₹1.90 Cr
32% lower ↓
DESIGN LIFE
16 years
60% longer ↗
Pavement layer composition
ⓘ
Conventional (VG)
Total: 160 mm
PMB / PMA
Total: 125 mm
Lifecycle cost breakdown
ⓘ
Performance improvement
ⓘ
Results are AI-generated based on IRC-37, MEPDG and empirical models. Validate with detailed engineering analysis.
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