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

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Presentation on theme: "Dr. Wa'el M. Albawwab ECGD4228 Transportation Engineering II Summer 2008 Sat. 15:30-18:30 PM K115."— Presentation transcript:

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

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

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

4 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

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

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

7 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

8 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

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

10 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

36 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)

37 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

38 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

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

40 Dr. Wa'el M. Albawwab Rigid Pavement Surfaces

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


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