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Pavement Maintenance Management


Quiz Questions

1.Alligator cracking or fatigue cracking is a series of interconnected cracks caused by fatigue failure of the asphalt concrete surface under repeated traffic loading. Alligator cracking occurs only in areas subjected to repeated traffic loading such as wheel path. Therefore, it would not occur over an entire area unless the entire area were subjected to traffic loading.
True
False
2. Bleeding is caused by excessive asphalt cement or tars in the mix, excess application of bituminous sealant, and/or low air void content.
True
False
3. Block cracking is caused mainly by shrinkage of the asphalt concrete and daily temperature cycling, which results in daily stress/strain cycling. It is not load associated. It usually indicates that the asphalt has hardened significantly. It normally occurs over a large proportion of pavement area, but sometimes will occur only in non traffic areas.
True
False
4. Which one of the following could cause a bump on the road.
Buckling or bulging of underlying Portland cement concrete (PCC) slabs in asphalt concrete (AC) overlay over PCC pavement.
Frost heave (ice, lens growth)
Infiltration and buildup of material in a crack in combination with traffic loading (sometimes called tenting)
All of the above)
5.Sags are small, abrupt, downward displacements of the pavement surface.
True
False
6.Swelling is distortion and displacement which occurs over large areas of the pavement surface, causing large and/or long dips in the pavement.
True
False
7.Corrugation also known as washboarding is caused by a combination of traffic action and unstable pavement surface or base.
Ture
False
8.Depressions are created by settlement of the foundation soil or are a result of improper construction. When filled with water can cause hydroplaning.
Ture
False
9.Edge cracking is parallel to and usually within 1 to 2 feet of the outer edge of the pavement. This distress is accelerated by traffic loading and can be caused by frost-weakened base or subgrade near the edge of the pavement:
True
False
10. Joint reflection cracks are mainly caused by the thermal or moisture induced movement of PCC slab beneath the AC surface.
Ture
False
11. Polished aggregate is caused by repeated traffic applications. It reduced the adhesion/friction with vehicle tires during driving or braking of vehicles.
True
False
12. A rut is a surface depression in the wheel path. Rutting stems from a permanent deformation in any of the pavement layers or subgrade, usually caused by consolidated or lateral movement of the materials due to traffic loads.
True
False
13. Shoving is caused by traffic loading. When traffic pushed against the pavement, it produces a short, abrupt wave in the pavement surface. This normally occurs in unstable liquid asphalt mix pavements.
True
False
14. Slippage cracks are half moon-shaped cracks produced when breaking or turning wheels cause the pavement surface to slide or deform. This distress usually occurs when there is low-strength surface mix or a poor bond between the surface and the next layer of the pavement structure.
True
False
15. Swell is caused by frost action in the subgrade or by swelling soil.
True
False
16. Weathering is caused by loss of asphalt or tar binder and dislodged aggregate particles. These distresses indicate that either the asphalt binder has hardened appreciably or that a poor quality mixture is present.
True
False