5837-18 - Types of Overlays and Their Functions Purposes of...

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Types of Overlays and Their Functions Purposes of Overlay: 1. To correct surface deficiencies, such as: a) To improve skid resistance b) To enhance appearance c) To reduce surface roughness d) To improve surface drainage e) To retard climate-related deterioration (such as hardening of asphalt surface) 2. To improve structural capacity. Types of Overlay (1) Asphalt overlays on asphalt pavement (2) Asphalt overlays on PCC pavement (3) Porous asphalt friction course on PCC pavement (4) Unbonded PCC overlay on PCC pavement (5) Partially bonded PCC overlay on PCC pavement (6) Bonded PCC overlay on PCC pavement (7) Unbonded PCC overlay on asphalt pavement (8) Bonded PCC overlay on asphalt pavement
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Asphalt overlays on asphalt pavement Advantages: (1) To add load carrying capacity. (2) To remove deteriorated surface (if milling is done before overlay.) Disadvantages: (1) If overlay is put on cracked pavement without milling, reflective cracking will occur. (2) If the problem is due to inadequate mixture (e.g. rutting due to an inadequate mixture), overlaying
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This note was uploaded on 05/26/2011 for the course TTE 5837 taught by Professor Staff during the Spring '11 term at University of Florida.

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5837-18 - Types of Overlays and Their Functions Purposes of...

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