29.7. Problems

Try these first

1. 1.

   What is the purpose of a dowel bar in rigid pavement?

   Hint

   Think about the role of the dowel as a connector of weight.

2. 2.

   Define thermal expansion in concrete.

   Hint

   What happens to materials when they get warmer?

3. 3.

   What type of joint accommodates thermal expansion in concrete?

   • Expansion Joint
   • Contraction Joint
   • Control Joint

   Hint

   Think about which joint type deals with heat.

4. 4.

   True or False: Tie bars are used to transfer loads between two concrete slabs.

   • True
   • False

   Hint

   Consider the role tie bars play versus dowel bars.

5. 5.

   Design an expansion joint for a concrete pavement 25 cm thick for an area experiencing temperature variations of 25°C throughout the year. Determine the joint width needed.

   Hint

   Consider the thermal coefficient for concrete and use the temperature change.

6. 6.

   Given the wheel loads acting on multiple lanes of pavement, analyze the point of maximum stress for both edge and corner conditions. Elucidate steps taken.

   Hint

   Refer to appropriate equations based on load types and positions.