PAVEMENT ENGINEERING

Anno accademico 2020/2021 - 1° anno - Curriculum Ingegneria dei trasporti
Docenti: Salvatore CAFISO e Alessandro SEVERINO
Crediti: 6
SSD: ICAR/04 - STRADE, FERROVIE ED AEROPORTI
Organizzazione didattica: 150 ore d'impegno totale, 92 di studio individuale, 28 di lezione frontale, 30 di esercitazione
Semestre:

Obiettivi formativi

This course will provide students knowledge and skills relevant to asphalt materials and pavement design and maintenance, including material selection and characterization, mix design of asphalt concrete, design of pavement layers using both empirical and mechanistic methods, performance evaluation of existing pavements using visual inspection, manual system, high speed equipment and instrumented vehicles, and laboratory testing of materials.


Modalità di svolgimento dell'insegnamento

Lectures, tutorials, exercises, and project work.


Frequenza lezioni

Attendance is strongly suggested


Contenuti del corso

1

Traffic, environmental conditions, soil and drainage

Weather and Environment factors. Traffic and load distribution concepts. Load Equivalency Factors. Subgrade, Subbase, Drainage. Soil stabilization concept and methods.

Material characterization and asphalt mix design

Historical background. Pavement performances. Pavement Type: Flexible pavement, Rigid pavement, Special Pavement: Draining-Sound Absorbent, Composite. Asphalt Concrete. Properties and characteristics of binders and aggregates. Laboratory material characterization. Viscoelastic nature of asphalt and direct measure of stiffness. Types, properties and design of asphalt mixes. Marshall and Superpave mix Design. Harmonized European Specifications.

Structural design

Resilient modulus, Dynamic modulus of asphalt concrete. Fatigue cracking, Rutting and permanent deformation. Pavement performance and analysis period. Pavements catalogs. Empirical Methods. Mechanicistic-Empirical Methods.

Maintenance and rehabilitation

Maintenance and rehabilitation of asphalt pavement. Pavement Management Systems (PMS). Pavement Survey. Nondestructive tests. Bearing capacity, Unevenness, Skid resistance and surface texture, visual evaluation of Distress. Overlay design.


Testi di riferimento

American Association of State Highway and Transportation Officials – AASHTO (1993). Guide for Design of Pavement Structures, 4th Edition.

American Association of State Highway and Transportation Officials – AASHTO (2008). Mechanistic-Empirical Pavement Design Guide.

Huang Y. H. (2003). Pavement Analysis and Design. Prentice Hall.

Mallick R. B., El-Korchi T. (2008). Pavement Engineering. Chapman and Hall/CRC.


Verifica dell'apprendimento

Modalità di verifica dell'apprendimento

Oral examination: mid-term (40%) and final (40%)

Timely execution and discussion of the assigned homeworks and final pavement design project (20%).

 

Attendance and active participation will be positively evaluated.


Esempi di domande e/o esercizi frequenti

Exam questions

Materials

  1. Subgrade Definition and stress distribution
  2. Subgrade classification
  3. Bearing Capacity Investigation Plate test (static, Dynamic)
  4. Bearing Capacity Investigation Resilient Modulus
  5. Bearing Capacity Investigation Empirical tests (CBR, DCP)
  6. Compaction
  7. Soil Stabilization
  8. Drainage Typology and Design
  9. Aggregate Characteristics
  10. Aggregate Gradation
  11. Asphalt Concrete components and Mix Volumetric properties
  12. Asphalt binder typologies
  13. Asphalt binder empirical classification
  14. Asphalt binder rheology: viscosity
  15. Asphalt binder rheology: complex modulus
  16. Asphalt binder rheology: stiffness and Strength
  17. Asphalt Binder Performance Grade
  18. Asphalt Concrete Mix Design: Marshall
  19. Asphalt Concrete Mix Design: Superpave
  20. Asphalt Concrete Characteristics: Complex Modulus
  21. Asphalt Concrete Characteristics: Moduli Laboratory testing
  22. Asphalt Concrete Characteristics: Moduli empirical formulas

 

Design

  1. AASHTO empirical Design: Structural Number (PSI, Mr, R, S, ESAL)
  2. AASHTO empirical Design: Swelling
  3. AASHTO empirical Design: Layer coefficients and thickness distribution
  4. AASHTO Overlay design
  5. Empirical Mechanistic Design: Traffic Factors
  6. Empirical Mechanistic Design: Environmental factors
  7. Empirical Mechanistic Design: Multilayer Elastic System
  8. Empirical Mechanistic Design: Fatigue cracking
  9. Empirical Mechanistic Design: Rutting

 

Maintenance

  1. Pavement bearing capacity: Falling Weight Deflectometer
  2. Skid resistance: GRIP, SCRIM
  3. Pavement longitudinal profile: micro-macro-mega texture (MPD, IRI)
  4. Pavement surface distress