Dr. Wa'el M. Albawwab ECGD4228 Transportation Engineering II Summer 2008 Sat. 15:30-18:30 PM K115

Dr. Wa'el M. Albawwab  Pavement Purpose and Significance  Pavement Conditions  Pavement Types and Materials Lecture 4

Dr. Wa'el M. Albawwab  Pavement Materials  Pavement Structural Analysis  Pavement Design  Pavement Maintenance  Pavement Rehabilitation  Pavement Management Systems Pavement Engineering

Dr. Wa'el M. Albawwab  Road pavements are structures designed and built on existing grounds to facilitate smooth, safe, reliable, and convenient traffic flows. General Definition

Dr. Wa'el M. Albawwab  Flexible Pavements  Rigid Pavements  Mixed Pavements Categories of Road Paving

Dr. Wa'el M. Albawwab Category II: Rigid Pavements

Dr. Wa'el M. Albawwab  Portland cement concrete (PCC) pavements  Considered as rigid structures since PCC’s high modulus of elasticity does not allow them to flex appreciably under the applied traffic loads. Categories of Road Paving Rigid Pavements

Dr. Wa'el M. Albawwab  Extremely high volume traffic lanes  Freeway to freeway connections  Exit ramps with extremely heavy traffic Typical Applications of Rigid Pavements

Dr. Wa'el M. Albawwab  High durability  Longer service life  Suitable for flooding areas  Withstands ground water changes Advantages of Rigid Pavements

Dr. Wa'el M. Albawwab  May lose non-slip properties with time  Requires even sub-grade with uniform settling  May suffer ruptures at transverse joints Disadvantages of Rigid Pavements

Dr. Wa'el M. Albawwab Types of Rigid Pavements Jointed Plain Concrete Pavement (JPCP)

Dr. Wa'el M. Albawwab Types of Rigid Pavements Jointed Reinforced Concrete Pavement (JRCP)

Dr. Wa'el M. Albawwab Types of Rigid Pavements Continuous Reinforced Concrete Pavement (CRCP)

Dr. Wa'el M. Albawwab Types of Rigid Pavements Pre-stressed Concrete Pavement (PCP)

Dr. Wa'el M. Albawwab Surfaces of Rigid Pavements

Dr. Wa'el M. Albawwab Surfaces of Rigid Pavements

Dr. Wa'el M. Albawwab Surfaces of Rigid Pavements

Dr. Wa'el M. Albawwab Structure of Rigid Pavements

Dr. Wa'el M. Albawwab Load Distribution in Rigid Pavements

Dr. Wa'el M. Albawwab Load Effect in Rigid Pavements

Dr. Wa'el M. Albawwab Configuration of Rigid Pavements Heavy Traffic Volumes

Dr. Wa'el M. Albawwab Configuration of Rigid Pavements Light Traffic Volumes

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Condition vs. Time

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Longitudinal Fatigue Cracking

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Transverse Fatigue Cracking

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Diagonal Fatigue Cracking

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Spalled Corner Fatigue Cracking

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Faulting

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Punching

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Shattering

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Scaling and Polishing

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Water Bleeding at Slab Edges

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Frost Heaving

Dr. Wa'el M. Albawwab Distresses in Rigid Pavements Total Failures

Dr. Wa'el M. Albawwab Types of Rigid Pavement Jointed Plain Concrete Pavement (JPCP) Jointed Plain Concrete Pavement (JPCP)

Dr. Wa'el M. Albawwab Rigid Pavements Testing of Subgrade Properties  Characterized by strength and/or stiffness  California Bearing Ratio (CBR)  Measures shearing resistance  Typical values: %  Resilient Modulus (M R )  Measures stress-strain relationship  Typical values: 3, ,000 psi (20 – 275 MPa)

Dr. Wa'el M. Albawwab GradeCBR M R (psi) Typical Description Good ≥ 10 20,000 Gravels, crushed stone and sandy soils. GW, GP, GM, SW, SP, SM soils are often in this category. Fair 5 – 9 10,000 Clayey gravel and clayey sand, fine silt soils. GM, GC, SM, SC soils are often in this category. Poor 3 – 5 5,000 Fine silty sands, clays, silts, organic soils. CL, CH, ML, MH, CM, OL, OH soils are often in this category. Testing of Subgrade Properties

Dr. Wa'el M. Albawwab Types of Rigid Pavement Continuously Reinforced Concrete Pavement (CRCP) Continuously Reinforced Concrete Pavement (CRCP) Photo from the Concrete Reinforcing Steel Institute

Dr. Wa'el M. Albawwab Rigid Pavement – Construction Slipform Fixed form FYI – NOT TESTABLE

Dr. Wa'el M. Albawwab Rigid Pavement Surfaces

Dr. Wa'el M. Albawwab Paving of a Concrete Pavement