PAVEMENT ENGINEERING

This course will provide students with technical knowledge and skills relevant to the field of Pavement Engineering and it has been designed for highways-related engineers and managers or anyone who wishes to extend their knowledge of asphalt materials, pavement design and maintenance.

The course begins by investigating each of the constituent materials followed by consideration of Asphalt Concrete mix composition and design. The course deals with bitumen, aggregates and asphalt materials.

Pavement design is then considered, with recent changes in design procedures from empirical to analytical methods being described. The assessment of pavement conditions and design for maintenance of pavements including overlay design will also be discussed.

Lectures, tutorials, exercises, and project work.

Attendance is strongly suggested

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.

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

pdf copies of the lessons will be distribuited to the students before the class presentation

Oral examination: mid-term (30%) + final (45%) + homeworks and final pavement design project (25%).

mid term exam is optional for the student

1) Mid term exam: topics listed in questions: A) 1÷10; 12; 16; 17 - B) 1÷3

2) Final exam: topics listed in questions: A) 11; 13÷15; 18; 19 - B) 4÷10 - C) 1÷4

Only Final exam: all topics in the list of questions

3) Timely execution and quality of the assigned homeworks and quality of the final pavement design project

Attendance and active participation will be positively evaluated.

Topics and Exam questions

A) Materials

1.Subgrade classification [3.0]

2.Bearing Capacity Investigation Plate test (static plate, FWD, LWD) [3.0]

3.Bearing Capacity Investigation Resilient Modulus [3.0]

4.Bearing Capacity Investigation Empirical tests (CBR) [3.0]

5.Compaction (proctor test, site control) [3.0]

6.Seasonal variation, equivalent design value of Mr [3.0]

7.Aggregate characteristics and laboratory test [5.1; 5.2, 5.3]

8.Asphalt Concrete components and Mix Volumetric properties [5.4]

9.Asphalt binder typologies and applications (natural, artificial, cutback, emulsion, foamed, modified, special) [6.1]

10.Asphalt binder empirical testing and classification [6.2]

11.Asphalt binder rheology: viscosity definition and laboratory test (dynamic, kinematic viscosity) [6.2]

12.Asphalt binder stiffness (IP, Van der Poel) [6.2]

13.Asphalt binder rheology: viscosity and complex modulus (RV, DSR) [6.3]

14.Asphalt binder rheology: Ageing, stiffness and Strength (RTFO, PAV, BBR, DTT) [6.3]

15.Asphalt Binder Performance Grade [6.4]

16.Asphalt Concrete Mix Design: Marshall [7.0]

17.Asphalt Concrete Mix Design: Superpave [5.3; 8.0]

18.Asphalt Concrete Characteristics: Complex Modulus model and definition [9.0]

19.Asphalt Concrete Characteristics: Modulus Laboratory testing and empirical formulas [9.0]

B) Design

1.Empirical Mechanistic Design: Traffic factors (Traffic load types and distribution) [2.0]

2.Empirical Mechanistic Design: Environmental factors (temperature, moisture) [2.0]

3.AASHTO empirical Design: Equivalent Standard Axle Load, ESALs in the design period [2.0]

4.AASHTO empirical Design: Structural Number (PSI, Mr, R, S, ESAL) [12.0]

5.AASHTO empirical Design: Swelling [12.0]

6.AASHTO empirical Design: Layer coefficients and thickness distribution [12.0]

7.AASHTO Overlay design [16.0]

8.Empirical Mechanistic Design: Multilayer Elastic System [10.0]

9.Empirical Mechanistic Design: Fatigue cracking model, laboratory test and design formulas [10.0]

10.Empirical Mechanistic Design: Rutting model, laboratory test and design formulas [10.0]

C) Maintenance

1.Effective Pavement bearing capacity: Falling Weight Deflectometer (test, layer moduli, SNeff) [11.0]

2.Skid resistance: GRIP, SCRIM (equipment and coefficient estimation) [13.0]

3.Pavement longitudinal profile: micro-macro-mega texture, MPD, IRI (equipment and coefficient estimation) [13.0]

4.Pavement surface distress: classification and measurement systems (cracks, rutting) [10.0; 13.0]