Civil Engineering Materials and Pavement Part I: Civil Engineering … · 2013. 2. 12. · CE115_1 Civil Engineering Materials and Pavement Systems Dr. Fouad Bayomy, PE Professor

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Civil Engineering Materials and Pavement Systems

Dr. Fouad Bayomy, PEProfessor of Civil Engineeringe-mail: [email protected]

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Part I: Civil Engineering Materials

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What do CE Material Engineers Do? Design Specify Select Construct Maintain Test and Evaluate Operate Manage

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What are CE Materials?

Portland Cement Concrete (PCC) Wood

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What are CE Materials? Steel

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What are CE Materials? Aluminum

Sohar Aluminum Smelter

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What are CE Materials? Asphalt Concrete

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What are CE Materials? Geosynthetics

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What are CE Materials? Portland Cement Concrete Asphalt Concrete Wood Steel Aluminum Fiber Reinforced Plastics Geosynthetics Soils

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Material Properties Physical Chemical Mechanical

Optical Electrical Magnetic Acoustic …….

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Physical Properties Unit Weight (Density), Specific Gravity Porosity, Voids Micro and Macro Structure Micro and Macro Texture Color, shape, surface heat absorption Moisture Content Thermal conductivity

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Chemical Properties They pertain to the composition and

potential reaction of a material to the surrounding environment Chemical composition Acidity Alkalinity Corrosion resistance

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Mechanical Properties They relate to the materials’ response to

applied loads (static and / or dynamic) Strength Stiffness (e.g. elastic modulus) Flexibility (ability to deform and recover shape) Toughness Fatigue resistance Deformation resistance (e.g. creep and rutting) Low Temperature cracking, and high temp

deformation …….

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CE Materials Courses at UI CE357 CE556 CE557

www.webs1.uidaho.edu/course numberwww.webs1.uidaho.edu/ce357

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Lab Testing

Head of testing machine

Steel ball

Rigid base

Specimen L/3L/3

L/3L/3L/3

Span length, L

25 mm min.

P

P

CE357 Lab

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X-ray Computed Tomography

X-Ray Source

Detector

Specimen

Collimator(window)

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Image Processing-Air Voids

Air Void

Asphalt Binder

Aggregate

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Field Testing using NDT

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Example: FWD

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Part II: Pavements

Civil Engineers Design, Construct, Maintain, Operate and Manage Pavement structures

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Pavement Types Flexible (Asphalt

Pavements) Rigid (Portland

Cement Concrete)

Highways Pavements

Airports Pavements

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Pavement Design Empirical Methods Mechanistic Methods

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AC

Granular Base

Subgrade

Granular Subbase

Empirical Design

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AC

Granular Base

Subgrade

Granular Subbase

Mechanistic DesignLoad stressdistribution

Subgrade

AC

Base

c = Confining stress d = Deviator stress = v - c

v = Vertical stress = c+ d

c

c

c

c=v + d

1-3.78

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Design Loads

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Materials Testing and Modeling

32

11

K

a

oct

K

aaR pp

pKM

Response depends on constitutive equation.

1

3

3

Pavement Construction Pavement Maintenance

Recycling

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Pavement Courses at UI CE475 CE575 CE577

www.webs1.uidaho.edu/course number

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Part III: Research and Development

Examples of Some Research Projects at UI/NIATT in the Pavements and Materials

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UI Pavement Lab

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Adopting Hi-Tech to Develop Simple- to-Use design tools

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Involvement of Undergraduate Students

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Collaboration with ITD

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Pavement Design Software

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Recognition of Students and Faculty at the ASCE 150th Anniversary National Convention In Washington, DC

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QuestionsContact Dr. BayomyPhone 885-6784e-mail: [email protected]

To Download the presentation:www.webs1.uidaho.edu/bayomy/ce115